1 /* BFD back-end for PDP-11 a.out binaries.
2 Copyright (C) 2001-2021 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, 1, 16, false, 0, complain_overflow_signed
,0,"16", true, 0x0000ffff,0x0000ffff, false),
284 HOWTO( 1, 0, 1, 16, true, 0, complain_overflow_signed
,0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
285 HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_signed
,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 NAME (aout
, swap_exec_header_out
) (abfd
, execp
, & exec_bytes
);
370 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
373 if (bfd_bwrite ((void *) &exec_bytes
, (bfd_size_type
) EXEC_BYTES_SIZE
, abfd
)
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
, (file_ptr
) (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
, (file_ptr
) (N_TRELOFF (execp
)), SEEK_SET
) != 0
392 || !NAME (aout
, squirt_out_relocs
) (abfd
, obj_textsec (abfd
))
393 || bfd_seek (abfd
, (file_ptr
) (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 /* Now fill in fields in the raw data, from the fields in the exec struct. */
466 PUT_MAGIC (abfd
, execp
->a_info
, bytes
->e_info
);
467 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
468 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
469 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
470 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
471 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
472 PUT_WORD (abfd
, 0, bytes
->e_unused
);
474 if ((execp
->a_trsize
== 0 || execp
->a_text
== 0)
475 && (execp
->a_drsize
== 0 || execp
->a_data
== 0))
476 PUT_WORD (abfd
, A_FLAG_RELOC_STRIPPED
, bytes
->e_flag
);
477 else if (execp
->a_trsize
== execp
->a_text
478 && execp
->a_drsize
== execp
->a_data
)
479 PUT_WORD (abfd
, 0, bytes
->e_flag
);
482 /* TODO: print a proper warning message. */
483 fprintf (stderr
, "BFD:%s:%d: internal error\n", __FILE__
, __LINE__
);
484 PUT_WORD (abfd
, 0, bytes
->e_flag
);
488 /* Make all the section for an a.out file. */
491 NAME (aout
, make_sections
) (bfd
*abfd
)
493 if (obj_textsec (abfd
) == NULL
&& bfd_make_section (abfd
, ".text") == NULL
)
495 if (obj_datasec (abfd
) == NULL
&& bfd_make_section (abfd
, ".data") == NULL
)
497 if (obj_bsssec (abfd
) == NULL
&& bfd_make_section (abfd
, ".bss") == NULL
)
502 /* Some a.out variant thinks that the file open in ABFD
503 checking is an a.out file. Do some more checking, and set up
504 for access if it really is. Call back to the calling
505 environment's "finish up" function just before returning, to
506 handle any last-minute setup. */
509 NAME (aout
, some_aout_object_p
) (bfd
*abfd
,
510 struct internal_exec
*execp
,
511 bfd_cleanup (*callback_to_real_object_p
) (bfd
*))
513 struct aout_data_struct
*rawptr
, *oldrawptr
;
515 size_t amt
= sizeof (struct aout_data_struct
);
517 rawptr
= bfd_zalloc (abfd
, amt
);
521 oldrawptr
= abfd
->tdata
.aout_data
;
522 abfd
->tdata
.aout_data
= rawptr
;
524 /* Copy the contents of the old tdata struct. */
525 if (oldrawptr
!= NULL
)
526 *abfd
->tdata
.aout_data
= *oldrawptr
;
528 abfd
->tdata
.aout_data
->a
.hdr
= &rawptr
->e
;
529 *(abfd
->tdata
.aout_data
->a
.hdr
) = *execp
; /* Copy in the internal_exec struct. */
530 execp
= abfd
->tdata
.aout_data
->a
.hdr
;
532 /* Set the file flags. */
533 abfd
->flags
= BFD_NO_FLAGS
;
534 if (execp
->a_drsize
|| execp
->a_trsize
)
535 abfd
->flags
|= HAS_RELOC
;
536 /* Setting of EXEC_P has been deferred to the bottom of this function. */
538 abfd
->flags
|= HAS_LINENO
| HAS_DEBUG
| HAS_SYMS
| HAS_LOCALS
;
539 if (N_DYNAMIC (execp
))
540 abfd
->flags
|= DYNAMIC
;
542 if (N_MAGIC (execp
) == ZMAGIC
)
544 abfd
->flags
|= D_PAGED
| WP_TEXT
;
545 adata (abfd
).magic
= z_magic
;
547 else if (N_MAGIC (execp
) == NMAGIC
)
549 abfd
->flags
|= WP_TEXT
;
550 adata (abfd
).magic
= n_magic
;
552 else if (N_MAGIC (execp
) == OMAGIC
)
553 adata (abfd
).magic
= o_magic
;
554 else if (N_MAGIC (execp
) == IMAGIC
)
555 adata (abfd
).magic
= i_magic
;
558 /* Should have been checked with N_BADMAG before this routine
563 abfd
->start_address
= execp
->a_entry
;
565 obj_aout_symbols (abfd
) = NULL
;
566 abfd
->symcount
= execp
->a_syms
/ sizeof (struct external_nlist
);
568 /* The default relocation entry size is that of traditional V7 Unix. */
569 obj_reloc_entry_size (abfd
) = RELOC_SIZE
;
571 /* The default symbol entry size is that of traditional Unix. */
572 obj_symbol_entry_size (abfd
) = EXTERNAL_NLIST_SIZE
;
575 bfd_init_window (&obj_aout_sym_window (abfd
));
576 bfd_init_window (&obj_aout_string_window (abfd
));
579 obj_aout_external_syms (abfd
) = NULL
;
580 obj_aout_external_strings (abfd
) = NULL
;
581 obj_aout_sym_hashes (abfd
) = NULL
;
583 if (! NAME (aout
, make_sections
) (abfd
))
586 obj_datasec (abfd
)->size
= execp
->a_data
;
587 obj_bsssec (abfd
)->size
= execp
->a_bss
;
589 obj_textsec (abfd
)->flags
=
590 (execp
->a_trsize
!= 0
591 ? (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_RELOC
)
592 : (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
));
593 obj_datasec (abfd
)->flags
=
594 (execp
->a_drsize
!= 0
595 ? (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
| SEC_RELOC
)
596 : (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_HAS_CONTENTS
));
597 obj_bsssec (abfd
)->flags
= SEC_ALLOC
;
599 #ifdef THIS_IS_ONLY_DOCUMENTATION
600 /* The common code can't fill in these things because they depend
601 on either the start address of the text segment, the rounding
602 up of virtual addresses between segments, or the starting file
603 position of the text segment -- all of which varies among different
604 versions of a.out. */
606 /* Call back to the format-dependent code to fill in the rest of the
607 fields and do any further cleanup. Things that should be filled
608 in by the callback: */
609 struct exec
*execp
= exec_hdr (abfd
);
611 obj_textsec (abfd
)->size
= N_TXTSIZE (execp
);
612 /* Data and bss are already filled in since they're so standard. */
614 /* The virtual memory addresses of the sections. */
615 obj_textsec (abfd
)->vma
= N_TXTADDR (execp
);
616 obj_datasec (abfd
)->vma
= N_DATADDR (execp
);
617 obj_bsssec (abfd
)->vma
= N_BSSADDR (execp
);
619 /* The file offsets of the sections. */
620 obj_textsec (abfd
)->filepos
= N_TXTOFF (execp
);
621 obj_datasec (abfd
)->filepos
= N_DATOFF (execp
);
623 /* The file offsets of the relocation info. */
624 obj_textsec (abfd
)->rel_filepos
= N_TRELOFF (execp
);
625 obj_datasec (abfd
)->rel_filepos
= N_DRELOFF (execp
);
627 /* The file offsets of the string table and symbol table. */
628 obj_str_filepos (abfd
) = N_STROFF (execp
);
629 obj_sym_filepos (abfd
) = N_SYMOFF (execp
);
631 /* Determine the architecture and machine type of the object file. */
632 abfd
->obj_arch
= bfd_arch_obscure
;
634 adata(abfd
)->page_size
= TARGET_PAGE_SIZE
;
635 adata(abfd
)->segment_size
= SEGMENT_SIZE
;
636 adata(abfd
)->exec_bytes_size
= EXEC_BYTES_SIZE
;
638 return _bfd_no_cleanup
;
640 /* The architecture is encoded in various ways in various a.out variants,
641 or is not encoded at all in some of them. The relocation size depends
642 on the architecture and the a.out variant. Finally, the return value
643 is the bfd_target vector in use. If an error occurs, return zero and
644 set bfd_error to the appropriate error code.
646 Formats such as b.out, which have additional fields in the a.out
647 header, should cope with them in this callback as well. */
648 #endif /* DOCUMENTATION */
650 cleanup
= (*callback_to_real_object_p
)(abfd
);
652 /* Now that the segment addresses have been worked out, take a better
653 guess at whether the file is executable. If the entry point
654 is within the text segment, assume it is. (This makes files
655 executable even if their entry point address is 0, as long as
656 their text starts at zero.).
658 This test had to be changed to deal with systems where the text segment
659 runs at a different location than the default. The problem is that the
660 entry address can appear to be outside the text segment, thus causing an
661 erroneous conclusion that the file isn't executable.
663 To fix this, we now accept any non-zero entry point as an indication of
664 executability. This will work most of the time, since only the linker
665 sets the entry point, and that is likely to be non-zero for most systems. */
667 if (execp
->a_entry
!= 0
668 || (execp
->a_entry
>= obj_textsec (abfd
)->vma
669 && execp
->a_entry
< (obj_textsec (abfd
)->vma
670 + obj_textsec (abfd
)->size
)
671 && execp
->a_trsize
== 0
672 && execp
->a_drsize
== 0))
673 abfd
->flags
|= EXEC_P
;
677 struct stat stat_buf
;
679 /* The original heuristic doesn't work in some important cases.
680 The a.out file has no information about the text start
681 address. For files (like kernels) linked to non-standard
682 addresses (ld -Ttext nnn) the entry point may not be between
683 the default text start (obj_textsec(abfd)->vma) and
684 (obj_textsec(abfd)->vma) + text size. This is not just a mach
685 issue. Many kernels are loaded at non standard addresses. */
686 if (abfd
->iostream
!= NULL
687 && (abfd
->flags
& BFD_IN_MEMORY
) == 0
688 && (fstat(fileno((FILE *) (abfd
->iostream
)), &stat_buf
) == 0)
689 && ((stat_buf
.st_mode
& 0111) != 0))
690 abfd
->flags
|= EXEC_P
;
692 #endif /* STAT_FOR_EXEC */
697 abfd
->tdata
.aout_data
= oldrawptr
;
702 /* Initialize ABFD for use with a.out files. */
705 NAME (aout
, mkobject
) (bfd
*abfd
)
707 struct aout_data_struct
*rawptr
;
708 size_t amt
= sizeof (struct aout_data_struct
);
710 bfd_set_error (bfd_error_system_call
);
712 /* Use an intermediate variable for clarity. */
713 rawptr
= bfd_zalloc (abfd
, amt
);
718 abfd
->tdata
.aout_data
= rawptr
;
719 exec_hdr (abfd
) = &(rawptr
->e
);
721 obj_textsec (abfd
) = NULL
;
722 obj_datasec (abfd
) = NULL
;
723 obj_bsssec (abfd
) = NULL
;
728 /* Keep track of machine architecture and machine type for
729 a.out's. Return the <<machine_type>> for a particular
730 architecture and machine, or <<M_UNKNOWN>> if that exact architecture
731 and machine can't be represented in a.out format.
733 If the architecture is understood, machine type 0 (default)
734 is always understood. */
737 NAME (aout
, machine_type
) (enum bfd_architecture arch
,
738 unsigned long machine
,
741 enum machine_type arch_flags
;
743 arch_flags
= M_UNKNOWN
;
750 || machine
== bfd_mach_sparc
751 || machine
== bfd_mach_sparc_sparclite
752 || machine
== bfd_mach_sparc_v9
)
753 arch_flags
= M_SPARC
;
754 else if (machine
== bfd_mach_sparc_sparclet
)
755 arch_flags
= M_SPARCLET
;
760 || machine
== bfd_mach_i386_i386
761 || machine
== bfd_mach_i386_i386_intel_syntax
)
766 if (machine
== 0) arch_flags
= M_ARM
;
774 case bfd_mach_mips3000
:
775 arch_flags
= M_MIPS1
;
777 case bfd_mach_mips4000
: /* MIPS3 */
778 case bfd_mach_mips4400
:
779 case bfd_mach_mips8000
: /* MIPS4 */
780 case bfd_mach_mips6000
: /* Real MIPS2: */
781 arch_flags
= M_MIPS2
;
784 arch_flags
= M_UNKNOWN
;
792 case 0: arch_flags
= M_NS32532
; break;
793 case 32032: arch_flags
= M_NS32032
; break;
794 case 32532: arch_flags
= M_NS32532
; break;
795 default: arch_flags
= M_UNKNOWN
; break;
800 /* TODO: arch_flags = M_PDP11; */
809 arch_flags
= M_UNKNOWN
;
812 if (arch_flags
!= M_UNKNOWN
)
818 /* Set the architecture and the machine of the ABFD to the
819 values ARCH and MACHINE. Verify that @ABFD's format
820 can support the architecture required. */
823 NAME (aout
, set_arch_mach
) (bfd
*abfd
,
824 enum bfd_architecture arch
,
825 unsigned long machine
)
827 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
830 if (arch
!= bfd_arch_unknown
)
834 NAME (aout
, machine_type
) (arch
, machine
, &unknown
);
839 obj_reloc_entry_size (abfd
) = RELOC_SIZE
;
841 return (*aout_backend_info(abfd
)->set_sizes
) (abfd
);
845 adjust_o_magic (bfd
*abfd
, struct internal_exec
*execp
)
847 file_ptr pos
= adata (abfd
).exec_bytes_size
;
850 asection
*text
= obj_textsec (abfd
);
851 asection
*data
= obj_datasec (abfd
);
852 asection
*bss
= obj_bsssec (abfd
);
856 if (!text
->user_set_vma
)
861 pos
+= execp
->a_text
;
862 vma
+= execp
->a_text
;
865 if (!data
->user_set_vma
)
873 execp
->a_text
+= pad
;
880 if (!bss
->user_set_vma
)
886 else if (data
->size
> 0 || bss
->size
> 0) /* PR25677: for objcopy --extract-symbol */
888 /* The VMA of the .bss section is set by the VMA of the
889 .data section plus the size of the .data section. We may
890 need to add padding bytes to make this true. */
891 pad
= bss
->vma
- vma
;
896 execp
->a_data
= data
->size
+ pad
;
898 execp
->a_bss
= bss
->size
;
900 N_SET_MAGIC (execp
, OMAGIC
);
904 adjust_z_magic (bfd
*abfd
, struct internal_exec
*execp
)
906 bfd_size_type data_pad
, text_pad
;
908 const struct aout_backend_data
*abdp
;
909 /* TRUE if text includes exec header. */
911 asection
*text
= obj_textsec (abfd
);
912 asection
*data
= obj_datasec (abfd
);
913 asection
*bss
= obj_bsssec (abfd
);
915 abdp
= aout_backend_info (abfd
);
919 && (abdp
->text_includes_header
920 || obj_aout_subformat (abfd
) == q_magic_format
));
921 text
->filepos
= (ztih
922 ? adata (abfd
).exec_bytes_size
923 : adata (abfd
).zmagic_disk_block_size
);
924 if (!text
->user_set_vma
)
926 /* ?? Do we really need to check for relocs here? */
927 text
->vma
= ((abfd
->flags
& HAS_RELOC
)
930 ? abdp
->default_text_vma
+ adata (abfd
).exec_bytes_size
931 : abdp
->default_text_vma
));
936 /* The .text section is being loaded at an unusual address. We
937 may need to pad it such that the .data section starts at a page
940 text_pad
= ((text
->filepos
- text
->vma
)
941 & (adata (abfd
).page_size
- 1));
943 text_pad
= (-text
->vma
944 & (adata (abfd
).page_size
- 1));
947 /* Find start of data. */
950 text_end
= text
->filepos
+ execp
->a_text
;
951 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
955 /* Note that if page_size == zmagic_disk_block_size, then
956 filepos == page_size, and this case is the same as the ztih
958 text_end
= execp
->a_text
;
959 text_pad
+= BFD_ALIGN (text_end
, adata (abfd
).page_size
) - text_end
;
960 text_end
+= text
->filepos
;
962 execp
->a_text
+= text_pad
;
965 if (!data
->user_set_vma
)
968 vma
= text
->vma
+ execp
->a_text
;
969 data
->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
971 if (abdp
&& abdp
->zmagic_mapped_contiguous
)
973 text_pad
= data
->vma
- (text
->vma
+ execp
->a_text
);
974 /* Only pad the text section if the data
975 section is going to be placed after it. */
977 execp
->a_text
+= text_pad
;
979 data
->filepos
= text
->filepos
+ execp
->a_text
;
981 /* Fix up exec header while we're at it. */
982 if (ztih
&& (!abdp
|| (abdp
&& !abdp
->exec_header_not_counted
)))
983 execp
->a_text
+= adata (abfd
).exec_bytes_size
;
984 N_SET_MAGIC (execp
, ZMAGIC
);
986 /* Spec says data section should be rounded up to page boundary. */
987 execp
->a_data
= align_power (data
->size
, bss
->alignment_power
);
988 execp
->a_data
= BFD_ALIGN (execp
->a_data
, adata (abfd
).page_size
);
989 data_pad
= execp
->a_data
- data
->size
;
992 if (!bss
->user_set_vma
)
993 bss
->vma
= data
->vma
+ execp
->a_data
;
994 /* If the BSS immediately follows the data section and extra space
995 in the page is left after the data section, fudge data
996 in the header so that the bss section looks smaller by that
997 amount. We'll start the bss section there, and lie to the OS.
998 (Note that a linker script, as well as the above assignment,
999 could have explicitly set the BSS vma to immediately follow
1000 the data section.) */
1001 if (align_power (bss
->vma
, bss
->alignment_power
) == data
->vma
+ execp
->a_data
)
1002 execp
->a_bss
= data_pad
> bss
->size
? 0 : bss
->size
- data_pad
;
1004 execp
->a_bss
= bss
->size
;
1008 adjust_n_magic (bfd
*abfd
, struct internal_exec
*execp
)
1010 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1013 asection
*text
= obj_textsec (abfd
);
1014 asection
*data
= obj_datasec (abfd
);
1015 asection
*bss
= obj_bsssec (abfd
);
1018 text
->filepos
= pos
;
1019 if (!text
->user_set_vma
)
1023 pos
+= execp
->a_text
;
1024 vma
+= execp
->a_text
;
1027 data
->filepos
= pos
;
1028 if (!data
->user_set_vma
)
1029 data
->vma
= BFD_ALIGN (vma
, adata (abfd
).segment_size
);
1032 /* Since BSS follows data immediately, see if it needs alignment. */
1034 pad
= align_power (vma
, bss
->alignment_power
) - vma
;
1035 execp
->a_data
= data
->size
+ pad
;
1036 pos
+= execp
->a_data
;
1039 if (!bss
->user_set_vma
)
1044 /* Fix up exec header. */
1045 execp
->a_bss
= bss
->size
;
1046 N_SET_MAGIC (execp
, NMAGIC
);
1050 adjust_i_magic (bfd
*abfd
, struct internal_exec
*execp
)
1052 file_ptr pos
= adata (abfd
).exec_bytes_size
;
1055 asection
*text
= obj_textsec (abfd
);
1056 asection
*data
= obj_datasec (abfd
);
1057 asection
*bss
= obj_bsssec (abfd
);
1060 text
->filepos
= pos
;
1061 if (!text
->user_set_vma
)
1065 pos
+= execp
->a_text
;
1068 data
->filepos
= pos
;
1069 if (!data
->user_set_vma
)
1073 /* Since BSS follows data immediately, see if it needs alignment. */
1075 pad
= align_power (vma
, bss
->alignment_power
) - vma
;
1076 execp
->a_data
= data
->size
+ pad
;
1077 pos
+= execp
->a_data
;
1080 if (!bss
->user_set_vma
)
1085 /* Fix up exec header. */
1086 execp
->a_bss
= bss
->size
;
1087 N_SET_MAGIC (execp
, IMAGIC
);
1091 NAME (aout
, adjust_sizes_and_vmas
) (bfd
*abfd
)
1093 struct internal_exec
*execp
= exec_hdr (abfd
);
1095 if (! NAME (aout
, make_sections
) (abfd
))
1098 if (adata (abfd
).magic
!= undecided_magic
)
1101 execp
->a_text
= align_power (obj_textsec (abfd
)->size
,
1102 obj_textsec (abfd
)->alignment_power
);
1104 /* Rule (heuristic) for when to pad to a new page. Note that there
1105 are (at least) two ways demand-paged (ZMAGIC) files have been
1106 handled. Most Berkeley-based systems start the text segment at
1107 (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
1108 segment right after the exec header; the latter is counted in the
1109 text segment size, and is paged in by the kernel with the rest of
1112 /* This perhaps isn't the right way to do this, but made it simpler for me
1113 to understand enough to implement it. Better would probably be to go
1114 right from BFD flags to alignment/positioning characteristics. But the
1115 old code was sloppy enough about handling the flags, and had enough
1116 other magic, that it was a little hard for me to understand. I think
1117 I understand it better now, but I haven't time to do the cleanup this
1121 adata (abfd
).magic
= i_magic
;
1122 else if (abfd
->flags
& WP_TEXT
)
1123 adata (abfd
).magic
= n_magic
;
1125 adata (abfd
).magic
= o_magic
;
1127 #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
1129 fprintf (stderr
, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
1131 switch (adata (abfd
).magic
)
1133 case n_magic
: str
= "NMAGIC"; break;
1134 case o_magic
: str
= "OMAGIC"; break;
1135 case i_magic
: str
= "IMAGIC"; break;
1136 case z_magic
: str
= "ZMAGIC"; break;
1141 obj_textsec (abfd
)->vma
, obj_textsec (abfd
)->size
,
1142 obj_textsec (abfd
)->alignment_power
,
1143 obj_datasec (abfd
)->vma
, obj_datasec (abfd
)->size
,
1144 obj_datasec (abfd
)->alignment_power
,
1145 obj_bsssec (abfd
)->vma
, obj_bsssec (abfd
)->size
,
1146 obj_bsssec (abfd
)->alignment_power
);
1150 switch (adata (abfd
).magic
)
1153 adjust_o_magic (abfd
, execp
);
1156 adjust_z_magic (abfd
, execp
);
1159 adjust_n_magic (abfd
, execp
);
1162 adjust_i_magic (abfd
, execp
);
1168 #ifdef BFD_AOUT_DEBUG
1169 fprintf (stderr
, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
1170 obj_textsec (abfd
)->vma
, execp
->a_text
,
1171 obj_textsec (abfd
)->filepos
,
1172 obj_datasec (abfd
)->vma
, execp
->a_data
,
1173 obj_datasec (abfd
)->filepos
,
1174 obj_bsssec (abfd
)->vma
, execp
->a_bss
);
1180 /* Called by the BFD in response to a bfd_make_section request. */
1183 NAME (aout
, new_section_hook
) (bfd
*abfd
, asection
*newsect
)
1185 /* Align to double at least. */
1186 newsect
->alignment_power
= bfd_get_arch_info(abfd
)->section_align_power
;
1188 if (bfd_get_format (abfd
) == bfd_object
)
1190 if (obj_textsec (abfd
) == NULL
1191 && !strcmp (newsect
->name
, ".text"))
1193 obj_textsec(abfd
)= newsect
;
1194 newsect
->target_index
= N_TEXT
;
1196 else if (obj_datasec (abfd
) == NULL
1197 && !strcmp (newsect
->name
, ".data"))
1199 obj_datasec (abfd
) = newsect
;
1200 newsect
->target_index
= N_DATA
;
1202 else if (obj_bsssec (abfd
) == NULL
1203 && !strcmp (newsect
->name
, ".bss"))
1205 obj_bsssec (abfd
) = newsect
;
1206 newsect
->target_index
= N_BSS
;
1210 /* We allow more than three sections internally. */
1211 return _bfd_generic_new_section_hook (abfd
, newsect
);
1215 NAME (aout
, set_section_contents
) (bfd
*abfd
,
1217 const void * location
,
1219 bfd_size_type count
)
1221 if (! abfd
->output_has_begun
)
1223 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
1227 if (section
== obj_bsssec (abfd
))
1229 bfd_set_error (bfd_error_no_contents
);
1233 if (section
!= obj_textsec (abfd
)
1234 && section
!= obj_datasec (abfd
))
1237 /* xgettext:c-format */
1238 (_("%pB: can not represent section `%pA' in a.out object file format"),
1240 bfd_set_error (bfd_error_nonrepresentable_section
);
1246 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0
1247 || bfd_bwrite (location
, count
, abfd
) != count
)
1254 /* Read the external symbols from an a.out file. */
1257 aout_get_external_symbols (bfd
*abfd
)
1259 if (obj_aout_external_syms (abfd
) == NULL
)
1261 bfd_size_type count
;
1262 struct external_nlist
*syms
;
1264 count
= exec_hdr (abfd
)->a_syms
/ EXTERNAL_NLIST_SIZE
;
1266 /* PR 17512: file: 011f5a08. */
1269 obj_aout_external_syms (abfd
) = NULL
;
1270 obj_aout_external_sym_count (abfd
) = count
;
1275 if (! bfd_get_file_window (abfd
, obj_sym_filepos (abfd
),
1276 exec_hdr (abfd
)->a_syms
,
1277 &obj_aout_sym_window (abfd
), true))
1279 syms
= (struct external_nlist
*) obj_aout_sym_window (abfd
).data
;
1281 /* We allocate using malloc to make the values easy to free
1282 later on. If we put them on the objalloc it might not be
1283 possible to free them. */
1284 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0)
1286 syms
= (struct external_nlist
*)
1287 _bfd_malloc_and_read (abfd
, count
* EXTERNAL_NLIST_SIZE
,
1288 count
* EXTERNAL_NLIST_SIZE
);
1293 obj_aout_external_syms (abfd
) = syms
;
1294 obj_aout_external_sym_count (abfd
) = count
;
1297 if (obj_aout_external_strings (abfd
) == NULL
1298 && exec_hdr (abfd
)->a_syms
!= 0)
1300 unsigned char string_chars
[BYTES_IN_LONG
];
1301 bfd_size_type stringsize
;
1303 bfd_size_type amt
= BYTES_IN_LONG
;
1305 /* Get the size of the strings. */
1306 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
1307 || bfd_bread ((void *) string_chars
, amt
, abfd
) != amt
)
1309 stringsize
= H_GET_32 (abfd
, string_chars
);
1310 if (stringsize
== 0)
1312 else if (stringsize
< BYTES_IN_LONG
1313 || (size_t) stringsize
!= stringsize
)
1315 bfd_set_error (bfd_error_bad_value
);
1320 if (stringsize
>= BYTES_IN_LONG
)
1322 if (! bfd_get_file_window (abfd
, obj_str_filepos (abfd
), stringsize
+ 1,
1323 &obj_aout_string_window (abfd
), true))
1325 strings
= (char *) obj_aout_string_window (abfd
).data
;
1330 strings
= (char *) bfd_malloc (stringsize
+ 1);
1331 if (strings
== NULL
)
1334 if (stringsize
>= BYTES_IN_LONG
)
1336 /* Keep the string count in the buffer for convenience
1337 when indexing with e_strx. */
1338 amt
= stringsize
- BYTES_IN_LONG
;
1339 if (bfd_bread (strings
+ BYTES_IN_LONG
, amt
, abfd
) != amt
)
1346 /* Ensure that a zero index yields an empty string. */
1347 memset (strings
, 0, BYTES_IN_LONG
);
1349 /* Ensure that the string buffer is NUL terminated. */
1350 strings
[stringsize
] = 0;
1352 obj_aout_external_strings (abfd
) = strings
;
1353 obj_aout_external_string_size (abfd
) = stringsize
;
1359 /* Translate an a.out symbol into a BFD symbol. The desc, other, type
1360 and symbol->value fields of CACHE_PTR will be set from the a.out
1361 nlist structure. This function is responsible for setting
1362 symbol->flags and symbol->section, and adjusting symbol->value. */
1365 translate_from_native_sym_flags (bfd
*abfd
,
1366 aout_symbol_type
*cache_ptr
)
1370 if (is_stab (cache_ptr
->type
, cache_ptr
->symbol
.name
))
1374 /* This is a debugging symbol. */
1375 cache_ptr
->symbol
.flags
= BSF_DEBUGGING
;
1377 /* Work out the symbol section. */
1378 switch (cache_ptr
->type
)
1386 sec
= obj_textsec (abfd
);
1390 sec
= obj_datasec (abfd
);
1394 sec
= obj_bsssec (abfd
);
1397 sec
= bfd_abs_section_ptr
;
1401 cache_ptr
->symbol
.section
= sec
;
1402 cache_ptr
->symbol
.value
-= sec
->vma
;
1407 /* Get the default visibility. This does not apply to all types, so
1408 we just hold it in a local variable to use if wanted. */
1409 if ((cache_ptr
->type
& N_EXT
) == 0)
1410 visible
= BSF_LOCAL
;
1412 visible
= BSF_GLOBAL
;
1414 switch (cache_ptr
->type
)
1417 case N_ABS
: case N_ABS
| N_EXT
:
1418 cache_ptr
->symbol
.section
= bfd_abs_section_ptr
;
1419 cache_ptr
->symbol
.flags
= visible
;
1422 case N_UNDF
| N_EXT
:
1423 if (cache_ptr
->symbol
.value
!= 0)
1425 /* This is a common symbol. */
1426 cache_ptr
->symbol
.flags
= BSF_GLOBAL
;
1427 cache_ptr
->symbol
.section
= bfd_com_section_ptr
;
1431 cache_ptr
->symbol
.flags
= 0;
1432 cache_ptr
->symbol
.section
= bfd_und_section_ptr
;
1436 case N_TEXT
: case N_TEXT
| N_EXT
:
1437 cache_ptr
->symbol
.section
= obj_textsec (abfd
);
1438 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1439 cache_ptr
->symbol
.flags
= visible
;
1442 case N_DATA
: case N_DATA
| N_EXT
:
1443 cache_ptr
->symbol
.section
= obj_datasec (abfd
);
1444 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1445 cache_ptr
->symbol
.flags
= visible
;
1448 case N_BSS
: case N_BSS
| N_EXT
:
1449 cache_ptr
->symbol
.section
= obj_bsssec (abfd
);
1450 cache_ptr
->symbol
.value
-= cache_ptr
->symbol
.section
->vma
;
1451 cache_ptr
->symbol
.flags
= visible
;
1458 /* Set the fields of SYM_POINTER according to CACHE_PTR. */
1461 translate_to_native_sym_flags (bfd
*abfd
,
1463 struct external_nlist
*sym_pointer
)
1465 bfd_vma value
= cache_ptr
->value
;
1468 const char *name
= cache_ptr
->name
!= NULL
? cache_ptr
->name
: "*unknown*";
1470 /* Mask out any existing type bits in case copying from one section
1472 if (!is_stab (sym_pointer
->e_type
[0], name
))
1473 sym_pointer
->e_type
[0] &= ~N_TYPE
;
1475 sec
= bfd_asymbol_section (cache_ptr
);
1480 /* This case occurs, e.g., for the *DEBUG* section of a COFF
1483 /* xgettext:c-format */
1484 (_("%pB: can not represent section for symbol `%s' in a.out object file format"),
1486 bfd_set_error (bfd_error_nonrepresentable_section
);
1490 if (sec
->output_section
!= NULL
)
1492 off
= sec
->output_offset
;
1493 sec
= sec
->output_section
;
1496 if (bfd_is_abs_section (sec
))
1497 sym_pointer
->e_type
[0] |= N_ABS
;
1498 else if (sec
== obj_textsec (abfd
))
1499 sym_pointer
->e_type
[0] |= N_TEXT
;
1500 else if (sec
== obj_datasec (abfd
))
1501 sym_pointer
->e_type
[0] |= N_DATA
;
1502 else if (sec
== obj_bsssec (abfd
))
1503 sym_pointer
->e_type
[0] |= N_BSS
;
1504 else if (bfd_is_und_section (sec
))
1505 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1506 else if (bfd_is_com_section (sec
))
1507 sym_pointer
->e_type
[0] = N_UNDF
| N_EXT
;
1511 /* xgettext:c-format */
1512 (_("%pB: can not represent section `%pA' in a.out object file format"),
1514 bfd_set_error (bfd_error_nonrepresentable_section
);
1518 /* Turn the symbol from section relative to absolute again */
1519 value
+= sec
->vma
+ off
;
1521 if ((cache_ptr
->flags
& BSF_DEBUGGING
) != 0)
1522 sym_pointer
->e_type
[0] = ((aout_symbol_type
*) cache_ptr
)->type
;
1523 else if ((cache_ptr
->flags
& BSF_GLOBAL
) != 0)
1524 sym_pointer
->e_type
[0] |= N_EXT
;
1526 PUT_WORD(abfd
, value
, sym_pointer
->e_value
);
1531 /* Native-level interface to symbols. */
1534 NAME (aout
, make_empty_symbol
) (bfd
*abfd
)
1536 size_t amt
= sizeof (aout_symbol_type
);
1537 aout_symbol_type
*new_symbol_type
= bfd_zalloc (abfd
, amt
);
1539 if (!new_symbol_type
)
1541 new_symbol_type
->symbol
.the_bfd
= abfd
;
1543 return &new_symbol_type
->symbol
;
1546 /* Translate a set of external symbols into internal symbols. */
1549 NAME (aout
, translate_symbol_table
) (bfd
*abfd
,
1550 aout_symbol_type
*in
,
1551 struct external_nlist
*ext
,
1552 bfd_size_type count
,
1554 bfd_size_type strsize
,
1557 struct external_nlist
*ext_end
;
1559 ext_end
= ext
+ count
;
1560 for (; ext
< ext_end
; ext
++, in
++)
1565 x
= GET_WORD (abfd
, ext
->e_strx
);
1566 in
->symbol
.the_bfd
= abfd
;
1568 /* For the normal symbols, the zero index points at the number
1569 of bytes in the string table but is to be interpreted as the
1570 null string. For the dynamic symbols, the number of bytes in
1571 the string table is stored in the __DYNAMIC structure and the
1572 zero index points at an actual string. */
1573 if (x
== 0 && ! dynamic
)
1574 in
->symbol
.name
= "";
1575 else if (x
< strsize
)
1576 in
->symbol
.name
= str
+ x
;
1580 (_("%pB: invalid string offset %" PRIu64
" >= %" PRIu64
),
1581 abfd
, (uint64_t) x
, (uint64_t) strsize
);
1582 bfd_set_error (bfd_error_bad_value
);
1586 ovly
= H_GET_8 (abfd
, ext
->e_ovly
);
1590 (_("%pB: symbol indicates overlay (not supported)"), abfd
);
1591 bfd_set_error (bfd_error_bad_value
);
1595 in
->symbol
.value
= GET_WORD (abfd
, ext
->e_value
);
1596 /* e_desc is zero for normal symbols but for .stab symbols it
1597 carries the desc field in our extended 2.11BSD format. */
1598 in
->desc
= H_GET_16 (abfd
, ext
->e_desc
);
1600 in
->type
= H_GET_8 (abfd
, ext
->e_type
);
1601 in
->symbol
.udata
.p
= NULL
;
1603 if (! translate_from_native_sym_flags (abfd
, in
))
1607 in
->symbol
.flags
|= BSF_DYNAMIC
;
1613 /* We read the symbols into a buffer, which is discarded when this
1614 function exits. We read the strings into a buffer large enough to
1615 hold them all plus all the cached symbol entries. */
1618 NAME (aout
, slurp_symbol_table
) (bfd
*abfd
)
1620 struct external_nlist
*old_external_syms
;
1621 aout_symbol_type
*cached
;
1622 bfd_size_type cached_size
;
1624 /* If there's no work to be done, don't do any. */
1625 if (obj_aout_symbols (abfd
) != NULL
)
1628 old_external_syms
= obj_aout_external_syms (abfd
);
1630 if (! aout_get_external_symbols (abfd
))
1633 cached_size
= obj_aout_external_sym_count (abfd
);
1634 cached_size
*= sizeof (aout_symbol_type
);
1635 cached
= bfd_zmalloc (cached_size
);
1636 if (cached
== NULL
&& cached_size
!= 0)
1639 /* Convert from external symbol information to internal. */
1640 if (! (NAME (aout
, translate_symbol_table
)
1642 obj_aout_external_syms (abfd
),
1643 obj_aout_external_sym_count (abfd
),
1644 obj_aout_external_strings (abfd
),
1645 obj_aout_external_string_size (abfd
),
1652 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
1654 obj_aout_symbols (abfd
) = cached
;
1656 /* It is very likely that anybody who calls this function will not
1657 want the external symbol information, so if it was allocated
1658 because of our call to aout_get_external_symbols, we free it up
1659 right away to save space. */
1660 if (old_external_syms
== NULL
1661 && obj_aout_external_syms (abfd
) != NULL
)
1664 bfd_free_window (&obj_aout_sym_window (abfd
));
1666 free (obj_aout_external_syms (abfd
));
1668 obj_aout_external_syms (abfd
) = NULL
;
1674 /* We use a hash table when writing out symbols so that we only write
1675 out a particular string once. This helps particularly when the
1676 linker writes out stabs debugging entries, because each different
1677 contributing object file tends to have many duplicate stabs
1680 This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
1681 if BFD_TRADITIONAL_FORMAT is set. */
1683 /* Get the index of a string in a strtab, adding it if it is not
1686 static inline bfd_size_type
1687 add_to_stringtab (bfd
*abfd
,
1688 struct bfd_strtab_hash
*tab
,
1693 bfd_size_type str_index
;
1695 /* An index of 0 always means the empty string. */
1696 if (str
== 0 || *str
== '\0')
1699 /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
1700 doesn't understand a hashed string table. */
1702 if ((abfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1705 str_index
= _bfd_stringtab_add (tab
, str
, hash
, copy
);
1707 if (str_index
!= (bfd_size_type
) -1)
1708 /* Add BYTES_IN_LONG to the return value to account for the
1709 space taken up by the string table size. */
1710 str_index
+= BYTES_IN_LONG
;
1715 /* Write out a strtab. ABFD is already at the right location in the
1719 emit_stringtab (bfd
*abfd
, struct bfd_strtab_hash
*tab
)
1721 bfd_byte buffer
[BYTES_IN_LONG
];
1723 /* The string table starts with the size. */
1724 H_PUT_32 (abfd
, _bfd_stringtab_size (tab
) + BYTES_IN_LONG
, buffer
);
1725 if (bfd_bwrite ((void *) buffer
, (bfd_size_type
) BYTES_IN_LONG
, abfd
)
1729 return _bfd_stringtab_emit (abfd
, tab
);
1733 NAME (aout
, write_syms
) (bfd
*abfd
)
1735 unsigned int count
;
1736 asymbol
**generic
= bfd_get_outsymbols (abfd
);
1737 struct bfd_strtab_hash
*strtab
;
1739 strtab
= _bfd_stringtab_init ();
1743 for (count
= 0; count
< bfd_get_symcount (abfd
); count
++)
1745 asymbol
*g
= generic
[count
];
1747 struct external_nlist nsp
;
1749 indx
= add_to_stringtab (abfd
, strtab
, g
->name
, false);
1750 if (indx
== (bfd_size_type
) -1)
1752 PUT_WORD (abfd
, indx
, nsp
.e_strx
);
1754 if (bfd_asymbol_flavour(g
) == abfd
->xvec
->flavour
)
1756 H_PUT_16 (abfd
, aout_symbol (g
)->desc
, nsp
.e_desc
);
1757 H_PUT_8 (abfd
, 0, nsp
.e_ovly
);
1758 H_PUT_8 (abfd
, aout_symbol (g
)->type
, nsp
.e_type
);
1762 H_PUT_16 (abfd
, 0, nsp
.e_desc
);
1763 H_PUT_8 (abfd
, 0, nsp
.e_ovly
);
1764 H_PUT_8 (abfd
, 0, nsp
.e_type
);
1767 if (! translate_to_native_sym_flags (abfd
, g
, &nsp
))
1770 if (bfd_bwrite ((void *)&nsp
, (bfd_size_type
) EXTERNAL_NLIST_SIZE
, abfd
)
1771 != EXTERNAL_NLIST_SIZE
)
1774 /* NB: `KEEPIT' currently overlays `udata.p', so set this only
1775 here, at the end. */
1779 if (! emit_stringtab (abfd
, strtab
))
1782 _bfd_stringtab_free (strtab
);
1787 _bfd_stringtab_free (strtab
);
1793 NAME (aout
, canonicalize_symtab
) (bfd
*abfd
, asymbol
**location
)
1795 unsigned int counter
= 0;
1796 aout_symbol_type
*symbase
;
1798 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
1801 for (symbase
= obj_aout_symbols (abfd
); counter
++ < bfd_get_symcount (abfd
);)
1802 *(location
++) = (asymbol
*)(symbase
++);
1804 return bfd_get_symcount (abfd
);
1808 /* Output extended relocation information to a file in target byte order. */
1811 pdp11_aout_swap_reloc_out (bfd
*abfd
, arelent
*g
, bfd_byte
*natptr
)
1817 asymbol
*sym
= *(g
->sym_ptr_ptr
);
1818 asection
*output_section
= sym
->section
->output_section
;
1821 fprintf (stderr
, "BFD: can't do this reloc addend stuff\n");
1823 r_pcrel
= g
->howto
->pc_relative
;
1825 if (bfd_is_abs_section (output_section
))
1827 else if (output_section
== obj_textsec (abfd
))
1829 else if (output_section
== obj_datasec (abfd
))
1831 else if (output_section
== obj_bsssec (abfd
))
1833 else if (bfd_is_und_section (output_section
))
1835 else if (bfd_is_com_section (output_section
))
1840 BFD_ASSERT (r_type
!= -1);
1845 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
1847 reloc_entry
= r_index
<< 4 | r_type
| r_pcrel
;
1849 PUT_WORD (abfd
, reloc_entry
, natptr
);
1852 /* BFD deals internally with all things based from the section they're
1853 in. so, something in 10 bytes into a text section with a base of
1854 50 would have a symbol (.text+10) and know .text vma was 50.
1856 Aout keeps all it's symbols based from zero, so the symbol would
1857 contain 60. This macro subs the base of each section from the value
1858 to give the true offset from the section */
1861 #define MOVE_ADDRESS(ad) \
1864 /* Undefined symbol. */ \
1865 if (r_index < bfd_get_symcount (abfd)) \
1866 cache_ptr->sym_ptr_ptr = symbols + r_index; \
1867 cache_ptr->addend = ad; \
1871 /* Defined, section relative. replace symbol with pointer to \
1872 symbol which points to section. */ \
1876 case N_TEXT | N_EXT: \
1877 cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
1878 cache_ptr->addend = ad - su->textsec->vma; \
1881 case N_DATA | N_EXT: \
1882 cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
1883 cache_ptr->addend = ad - su->datasec->vma; \
1886 case N_BSS | N_EXT: \
1887 cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
1888 cache_ptr->addend = ad - su->bsssec->vma; \
1892 case N_ABS | N_EXT: \
1893 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
1894 cache_ptr->addend = ad; \
1900 pdp11_aout_swap_reloc_in (bfd
* abfd
,
1902 arelent
* cache_ptr
,
1903 bfd_size_type offset
,
1905 bfd_size_type symcount
)
1907 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
1908 unsigned int r_index
;
1913 reloc_entry
= GET_WORD (abfd
, (void *) bytes
);
1915 r_pcrel
= reloc_entry
& RELFLG
;
1917 cache_ptr
->address
= offset
;
1918 cache_ptr
->howto
= howto_table_pdp11
+ (r_pcrel
? 1 : 0);
1920 if ((reloc_entry
& RTYPE
) == RABS
)
1923 r_index
= RINDEX (reloc_entry
);
1925 /* r_extern reflects whether the symbol the reloc is against is
1927 r_extern
= (reloc_entry
& RTYPE
) == REXT
;
1929 if (r_extern
&& r_index
>= symcount
)
1931 /* We could arrange to return an error, but it might be useful
1932 to see the file even if it is bad. FIXME: Of course this
1933 means that objdump -r *doesn't* see the actual reloc, and
1934 objcopy silently writes a different reloc. */
1942 /* Read and swap the relocs for a section. */
1945 NAME (aout
, slurp_reloc_table
) (bfd
*abfd
, sec_ptr asect
, asymbol
**symbols
)
1948 bfd_size_type count
;
1949 bfd_size_type reloc_size
;
1951 arelent
*reloc_cache
;
1953 unsigned int counter
= 0;
1956 if (asect
->relocation
)
1959 if (asect
->flags
& SEC_CONSTRUCTOR
)
1962 if (asect
== obj_datasec (abfd
))
1963 reloc_size
= exec_hdr(abfd
)->a_drsize
;
1964 else if (asect
== obj_textsec (abfd
))
1965 reloc_size
= exec_hdr(abfd
)->a_trsize
;
1966 else if (asect
== obj_bsssec (abfd
))
1970 bfd_set_error (bfd_error_invalid_operation
);
1974 if (bfd_seek (abfd
, asect
->rel_filepos
, SEEK_SET
) != 0)
1976 relocs
= _bfd_malloc_and_read (abfd
, reloc_size
, reloc_size
);
1977 if (relocs
== NULL
&& reloc_size
!= 0)
1980 each_size
= obj_reloc_entry_size (abfd
);
1981 count
= reloc_size
/ each_size
;
1983 /* Count the number of NON-ZERO relocs, this is the count we want. */
1985 unsigned int real_count
= 0;
1987 for (counter
= 0; counter
< count
; counter
++)
1991 x
= GET_WORD (abfd
, (char *) relocs
+ each_size
* counter
);
1999 reloc_cache
= bfd_zmalloc (count
* sizeof (arelent
));
2000 if (reloc_cache
== NULL
&& count
!= 0)
2003 cache_ptr
= reloc_cache
;
2008 counter
++, rptr
+= RELOC_SIZE
, cache_ptr
++)
2010 while (GET_WORD (abfd
, (void *) rptr
) == 0)
2013 if ((char *) rptr
>= (char *) relocs
+ reloc_size
)
2017 pdp11_aout_swap_reloc_in (abfd
, rptr
, cache_ptr
,
2018 (bfd_size_type
) ((char *) rptr
- (char *) relocs
),
2020 (bfd_size_type
) bfd_get_symcount (abfd
));
2023 /* Just in case, if rptr >= relocs + reloc_size should happen
2025 BFD_ASSERT (counter
== count
);
2029 asect
->relocation
= reloc_cache
;
2030 asect
->reloc_count
= cache_ptr
- reloc_cache
;
2035 /* Write out a relocation section into an object file. */
2038 NAME (aout
, squirt_out_relocs
) (bfd
*abfd
, asection
*section
)
2041 unsigned char *native
;
2042 unsigned int count
= section
->reloc_count
;
2043 bfd_size_type natsize
;
2045 natsize
= section
->size
;
2046 native
= bfd_zalloc (abfd
, natsize
);
2050 generic
= section
->orelocation
;
2051 if (generic
!= NULL
)
2057 if ((*generic
)->howto
== NULL
2058 || (*generic
)->sym_ptr_ptr
== NULL
)
2060 bfd_set_error (bfd_error_invalid_operation
);
2061 _bfd_error_handler (_("%pB: attempt to write out "
2062 "unknown reloc type"), abfd
);
2063 bfd_release (abfd
, native
);
2066 r
= native
+ (*generic
)->address
;
2067 pdp11_aout_swap_reloc_out (abfd
, *generic
, r
);
2073 if (bfd_bwrite ((void *) native
, natsize
, abfd
) != natsize
)
2075 bfd_release (abfd
, native
);
2079 bfd_release (abfd
, native
);
2083 /* This is stupid. This function should be a boolean predicate. */
2086 NAME (aout
, canonicalize_reloc
) (bfd
*abfd
,
2091 arelent
*tblptr
= section
->relocation
;
2094 if (section
== obj_bsssec (abfd
))
2100 if (!(tblptr
|| NAME (aout
, slurp_reloc_table
)(abfd
, section
, symbols
)))
2103 if (section
->flags
& SEC_CONSTRUCTOR
)
2105 arelent_chain
*chain
= section
->constructor_chain
;
2107 for (count
= 0; count
< section
->reloc_count
; count
++)
2109 *relptr
++ = &chain
->relent
;
2110 chain
= chain
->next
;
2115 tblptr
= section
->relocation
;
2117 for (count
= 0; count
++ < section
->reloc_count
;)
2118 *relptr
++ = tblptr
++;
2123 return section
->reloc_count
;
2127 NAME (aout
, get_reloc_upper_bound
) (bfd
*abfd
, sec_ptr asect
)
2129 bfd_size_type count
;
2131 if (bfd_get_format (abfd
) != bfd_object
)
2133 bfd_set_error (bfd_error_invalid_operation
);
2137 if (asect
->flags
& SEC_CONSTRUCTOR
)
2138 count
= asect
->reloc_count
;
2139 else if (asect
== obj_datasec (abfd
))
2140 count
= exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
2141 else if (asect
== obj_textsec (abfd
))
2142 count
= exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
2143 else if (asect
== obj_bsssec (abfd
))
2147 bfd_set_error (bfd_error_invalid_operation
);
2151 if (count
>= LONG_MAX
/ sizeof (arelent
*))
2153 bfd_set_error (bfd_error_file_too_big
);
2156 return (count
+ 1) * sizeof (arelent
*);
2161 NAME (aout
, get_symtab_upper_bound
) (bfd
*abfd
)
2163 if (!NAME (aout
, slurp_symbol_table
) (abfd
))
2166 return (bfd_get_symcount (abfd
) + 1) * (sizeof (aout_symbol_type
*));
2170 NAME (aout
, get_lineno
) (bfd
* abfd ATTRIBUTE_UNUSED
,
2171 asymbol
* symbol ATTRIBUTE_UNUSED
)
2177 NAME (aout
, get_symbol_info
) (bfd
* abfd ATTRIBUTE_UNUSED
,
2181 bfd_symbol_info (symbol
, ret
);
2183 if (ret
->type
== '?')
2185 int type_code
= aout_symbol(symbol
)->type
& 0xff;
2186 const char *stab_name
= bfd_get_stab_name (type_code
);
2187 static char buf
[10];
2189 if (stab_name
== NULL
)
2191 sprintf(buf
, "(%d)", type_code
);
2195 ret
->stab_type
= type_code
;
2196 ret
->stab_other
= (unsigned) (aout_symbol(symbol
)->other
& 0xff);
2197 ret
->stab_desc
= (unsigned) (aout_symbol(symbol
)->desc
& 0xffff);
2198 ret
->stab_name
= stab_name
;
2203 NAME (aout
, print_symbol
) (bfd
* abfd
,
2206 bfd_print_symbol_type how
)
2208 FILE *file
= (FILE *) afile
;
2212 case bfd_print_symbol_name
:
2214 fprintf(file
,"%s", symbol
->name
);
2216 case bfd_print_symbol_more
:
2217 fprintf(file
,"%4x %2x %2x",
2218 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2219 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2220 (unsigned) (aout_symbol (symbol
)->type
));
2222 case bfd_print_symbol_all
:
2224 const char *section_name
= symbol
->section
->name
;
2226 bfd_print_symbol_vandf (abfd
, (void *) file
, symbol
);
2228 fprintf (file
," %-5s %04x %02x %02x",
2230 (unsigned) (aout_symbol (symbol
)->desc
& 0xffff),
2231 (unsigned) (aout_symbol (symbol
)->other
& 0xff),
2232 (unsigned) (aout_symbol (symbol
)->type
& 0xff));
2234 fprintf(file
," %s", symbol
->name
);
2240 /* If we don't have to allocate more than 1MB to hold the generic
2241 symbols, we use the generic minisymbol method: it's faster, since
2242 it only translates the symbols once, not multiple times. */
2243 #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
2245 /* Read minisymbols. For minisymbols, we use the unmodified a.out
2246 symbols. The minisymbol_to_symbol function translates these into
2247 BFD asymbol structures. */
2250 NAME (aout
, read_minisymbols
) (bfd
*abfd
,
2253 unsigned int *sizep
)
2256 /* We could handle the dynamic symbols here as well, but it's
2257 easier to hand them off. */
2258 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2260 if (! aout_get_external_symbols (abfd
))
2263 if (obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2264 return _bfd_generic_read_minisymbols (abfd
, dynamic
, minisymsp
, sizep
);
2266 *minisymsp
= (void *) obj_aout_external_syms (abfd
);
2268 /* By passing the external symbols back from this routine, we are
2269 giving up control over the memory block. Clear
2270 obj_aout_external_syms, so that we do not try to free it
2272 obj_aout_external_syms (abfd
) = NULL
;
2274 *sizep
= EXTERNAL_NLIST_SIZE
;
2275 return obj_aout_external_sym_count (abfd
);
2278 /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
2279 unmodified a.out symbol. The SYM argument is a structure returned
2280 by bfd_make_empty_symbol, which we fill in here. */
2283 NAME (aout
, minisymbol_to_symbol
) (bfd
*abfd
,
2285 const void * minisym
,
2289 || obj_aout_external_sym_count (abfd
) < MINISYM_THRESHOLD
)
2290 return _bfd_generic_minisymbol_to_symbol (abfd
, dynamic
, minisym
, sym
);
2292 memset (sym
, 0, sizeof (aout_symbol_type
));
2294 /* We call translate_symbol_table to translate a single symbol. */
2295 if (! (NAME (aout
, translate_symbol_table
)
2297 (aout_symbol_type
*) sym
,
2298 (struct external_nlist
*) minisym
,
2300 obj_aout_external_strings (abfd
),
2301 obj_aout_external_string_size (abfd
),
2308 /* Provided a BFD, a section and an offset into the section, calculate
2309 and return the name of the source file and the line nearest to the
2313 NAME (aout
, find_nearest_line
) (bfd
*abfd
,
2317 const char **filename_ptr
,
2318 const char **functionname_ptr
,
2319 unsigned int *line_ptr
,
2320 unsigned int *discriminator_ptr
)
2322 /* Run down the file looking for the filename, function and linenumber. */
2324 const char *directory_name
= NULL
;
2325 const char *main_file_name
= NULL
;
2326 const char *current_file_name
= NULL
;
2327 const char *line_file_name
= NULL
; /* Value of current_file_name at line number. */
2328 bfd_vma low_line_vma
= 0;
2329 bfd_vma low_func_vma
= 0;
2331 size_t filelen
, funclen
;
2334 *filename_ptr
= bfd_get_filename (abfd
);
2335 *functionname_ptr
= NULL
;
2337 if (discriminator_ptr
)
2338 *discriminator_ptr
= 0;
2340 if (symbols
!= NULL
)
2342 for (p
= symbols
; *p
; p
++)
2344 aout_symbol_type
*q
= (aout_symbol_type
*)(*p
);
2349 /* If this looks like a file name symbol, and it comes after
2350 the line number we have found so far, but before the
2351 offset, then we have probably not found the right line
2353 if (q
->symbol
.value
<= offset
2354 && ((q
->symbol
.value
> low_line_vma
2355 && (line_file_name
!= NULL
2357 || (q
->symbol
.value
> low_func_vma
2360 const char * symname
;
2362 symname
= q
->symbol
.name
;
2365 && strlen (symname
) > 2
2366 && strcmp (symname
+ strlen (symname
) - 2, ".o") == 0)
2368 if (q
->symbol
.value
> low_line_vma
)
2371 line_file_name
= NULL
;
2373 if (q
->symbol
.value
> low_func_vma
)
2380 /* If this symbol is less than the offset, but greater than
2381 the line number we have found so far, then we have not
2382 found the right line number. */
2383 if (q
->symbol
.value
<= offset
)
2385 if (q
->symbol
.value
> low_line_vma
)
2388 line_file_name
= NULL
;
2390 if (q
->symbol
.value
> low_func_vma
)
2394 main_file_name
= current_file_name
= q
->symbol
.name
;
2395 /* Look ahead to next symbol to check if that too is an N_SO. */
2399 q
= (aout_symbol_type
*)(*p
);
2400 if (q
->type
!= (int) N_SO
)
2403 /* Found a second N_SO First is directory; second is filename. */
2404 directory_name
= current_file_name
;
2405 main_file_name
= current_file_name
= q
->symbol
.name
;
2406 if (obj_textsec(abfd
) != section
)
2410 current_file_name
= q
->symbol
.name
;
2416 /* We'll keep this if it resolves nearer than the one we have
2418 if (q
->symbol
.value
>= low_line_vma
2419 && q
->symbol
.value
<= offset
)
2421 *line_ptr
= q
->desc
;
2422 low_line_vma
= q
->symbol
.value
;
2423 line_file_name
= current_file_name
;
2429 /* We'll keep this if it is nearer than the one we have already. */
2430 if (q
->symbol
.value
>= low_func_vma
&&
2431 q
->symbol
.value
<= offset
)
2433 low_func_vma
= q
->symbol
.value
;
2434 func
= (asymbol
*) q
;
2436 else if (q
->symbol
.value
> offset
)
2446 main_file_name
= line_file_name
;
2448 if (main_file_name
== NULL
2449 || main_file_name
[0] == '/'
2450 || directory_name
== NULL
)
2453 filelen
= strlen (directory_name
) + strlen (main_file_name
);
2457 funclen
= strlen (bfd_asymbol_name (func
));
2459 free (adata (abfd
).line_buf
);
2460 if (filelen
+ funclen
== 0)
2461 adata (abfd
).line_buf
= buf
= NULL
;
2464 buf
= bfd_malloc ((bfd_size_type
) filelen
+ funclen
+ 3);
2465 adata (abfd
).line_buf
= buf
;
2470 if (main_file_name
!= NULL
)
2472 if (main_file_name
[0] == '/' || directory_name
== NULL
)
2473 *filename_ptr
= main_file_name
;
2477 /* PR binutils/20891: In a corrupt input file both
2478 main_file_name and directory_name can be empty... */
2479 * filename_ptr
= NULL
;
2482 snprintf (buf
, filelen
+ 1, "%s%s", directory_name
,
2484 *filename_ptr
= buf
;
2492 const char *function
= func
->name
;
2497 /* PR binutils/20892: In a corrupt input file func can be empty. */
2498 * functionname_ptr
= NULL
;
2501 /* The caller expects a symbol name. We actually have a
2502 function name, without the leading underscore. Put the
2503 underscore back in, so that the caller gets a symbol name. */
2504 if (bfd_get_symbol_leading_char (abfd
) == '\0')
2505 strcpy (buf
, function
);
2508 buf
[0] = bfd_get_symbol_leading_char (abfd
);
2509 strcpy (buf
+ 1, function
);
2512 /* Have to remove : stuff. */
2513 colon
= strchr (buf
, ':');
2516 *functionname_ptr
= buf
;
2523 NAME (aout
, sizeof_headers
) (bfd
*abfd
,
2524 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2526 return adata (abfd
).exec_bytes_size
;
2529 /* Free all information we have cached for this BFD. We can always
2530 read it again later if we need it. */
2533 NAME (aout
, bfd_free_cached_info
) (bfd
*abfd
)
2537 if (bfd_get_format (abfd
) != bfd_object
)
2540 #define BFCI_FREE(x) do { free (x); x = NULL; } while (0)
2541 BFCI_FREE (obj_aout_symbols (abfd
));
2544 obj_aout_external_syms (abfd
) = 0;
2545 bfd_free_window (&obj_aout_sym_window (abfd
));
2546 bfd_free_window (&obj_aout_string_window (abfd
));
2547 obj_aout_external_strings (abfd
) = 0;
2549 BFCI_FREE (obj_aout_external_syms (abfd
));
2550 BFCI_FREE (obj_aout_external_strings (abfd
));
2552 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2553 BFCI_FREE (o
->relocation
);
2559 /* Routine to create an entry in an a.out link hash table. */
2561 struct bfd_hash_entry
*
2562 NAME (aout
, link_hash_newfunc
) (struct bfd_hash_entry
*entry
,
2563 struct bfd_hash_table
*table
,
2566 struct aout_link_hash_entry
*ret
= (struct aout_link_hash_entry
*) entry
;
2568 /* Allocate the structure if it has not already been allocated by a
2571 ret
= bfd_hash_allocate (table
, sizeof (* ret
));
2575 /* Call the allocation method of the superclass. */
2576 ret
= (struct aout_link_hash_entry
*)
2577 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
);
2580 /* Set local fields. */
2581 ret
->written
= false;
2585 return (struct bfd_hash_entry
*) ret
;
2588 /* Initialize an a.out link hash table. */
2591 NAME (aout
, link_hash_table_init
) (struct aout_link_hash_table
*table
,
2593 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
2594 struct bfd_hash_table
*,
2596 unsigned int entsize
)
2598 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
2601 /* Create an a.out link hash table. */
2603 struct bfd_link_hash_table
*
2604 NAME (aout
, link_hash_table_create
) (bfd
*abfd
)
2606 struct aout_link_hash_table
*ret
;
2607 size_t amt
= sizeof (struct aout_link_hash_table
);
2609 ret
= bfd_malloc (amt
);
2612 if (! NAME (aout
, link_hash_table_init
) (ret
, abfd
,
2613 NAME (aout
, link_hash_newfunc
),
2614 sizeof (struct aout_link_hash_entry
)))
2622 /* Free up the internal symbols read from an a.out file. */
2625 aout_link_free_symbols (bfd
*abfd
)
2627 if (obj_aout_external_syms (abfd
) != NULL
)
2630 bfd_free_window (&obj_aout_sym_window (abfd
));
2632 free ((void *) obj_aout_external_syms (abfd
));
2634 obj_aout_external_syms (abfd
) = NULL
;
2637 if (obj_aout_external_strings (abfd
) != NULL
)
2640 bfd_free_window (&obj_aout_string_window (abfd
));
2642 free ((void *) obj_aout_external_strings (abfd
));
2644 obj_aout_external_strings (abfd
) = NULL
;
2649 /* Given an a.out BFD, add symbols to the global hash table as
2653 NAME (aout
, link_add_symbols
) (bfd
*abfd
, struct bfd_link_info
*info
)
2655 switch (bfd_get_format (abfd
))
2658 return aout_link_add_object_symbols (abfd
, info
);
2660 return _bfd_generic_link_add_archive_symbols
2661 (abfd
, info
, aout_link_check_archive_element
);
2663 bfd_set_error (bfd_error_wrong_format
);
2668 /* Add symbols from an a.out object file. */
2671 aout_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2673 if (! aout_get_external_symbols (abfd
))
2675 if (! aout_link_add_symbols (abfd
, info
))
2677 if (! info
->keep_memory
)
2679 if (! aout_link_free_symbols (abfd
))
2685 /* Look through the internal symbols to see if this object file should
2686 be included in the link. We should include this object file if it
2687 defines any symbols which are currently undefined. If this object
2688 file defines a common symbol, then we may adjust the size of the
2689 known symbol but we do not include the object file in the link
2690 (unless there is some other reason to include it). */
2693 aout_link_check_ar_symbols (bfd
*abfd
,
2694 struct bfd_link_info
*info
,
2698 struct external_nlist
*p
;
2699 struct external_nlist
*pend
;
2704 /* Look through all the symbols. */
2705 p
= obj_aout_external_syms (abfd
);
2706 pend
= p
+ obj_aout_external_sym_count (abfd
);
2707 strings
= obj_aout_external_strings (abfd
);
2708 for (; p
< pend
; p
++)
2710 int type
= H_GET_8 (abfd
, p
->e_type
);
2711 const char *name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
2712 struct bfd_link_hash_entry
*h
;
2714 /* Ignore symbols that are not externally visible. This is an
2715 optimization only, as we check the type more thoroughly
2717 if ((type
& N_EXT
) == 0
2718 || is_stab(type
, name
)
2722 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
2724 /* We are only interested in symbols that are currently
2725 undefined or common. */
2727 || (h
->type
!= bfd_link_hash_undefined
2728 && h
->type
!= bfd_link_hash_common
))
2731 if (type
== (N_TEXT
| N_EXT
)
2732 || type
== (N_DATA
| N_EXT
)
2733 || type
== (N_BSS
| N_EXT
)
2734 || type
== (N_ABS
| N_EXT
))
2736 /* This object file defines this symbol. We must link it
2737 in. This is true regardless of whether the current
2738 definition of the symbol is undefined or common. If the
2739 current definition is common, we have a case in which we
2740 have already seen an object file including
2742 and this object file from the archive includes
2744 In such a case we must include this object file.
2746 FIXME: The SunOS 4.1.3 linker will pull in the archive
2747 element if the symbol is defined in the .data section,
2748 but not if it is defined in the .text section. That
2749 seems a bit crazy to me, and I haven't implemented it.
2750 However, it might be correct. */
2751 if (!(*info
->callbacks
2752 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
2758 if (type
== (N_UNDF
| N_EXT
))
2762 value
= GET_WORD (abfd
, p
->e_value
);
2765 /* This symbol is common in the object from the archive
2767 if (h
->type
== bfd_link_hash_undefined
)
2772 symbfd
= h
->u
.undef
.abfd
;
2775 /* This symbol was created as undefined from
2776 outside BFD. We assume that we should link
2777 in the object file. This is done for the -u
2778 option in the linker. */
2779 if (!(*info
->callbacks
2780 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
2785 /* Turn the current link symbol into a common
2786 symbol. It is already on the undefs list. */
2787 h
->type
= bfd_link_hash_common
;
2788 h
->u
.c
.p
= bfd_hash_allocate (&info
->hash
->table
,
2789 sizeof (struct bfd_link_hash_common_entry
));
2790 if (h
->u
.c
.p
== NULL
)
2793 h
->u
.c
.size
= value
;
2795 /* FIXME: This isn't quite right. The maximum
2796 alignment of a common symbol should be set by the
2797 architecture of the output file, not of the input
2799 power
= bfd_log2 (value
);
2800 if (power
> bfd_get_arch_info (abfd
)->section_align_power
)
2801 power
= bfd_get_arch_info (abfd
)->section_align_power
;
2802 h
->u
.c
.p
->alignment_power
= power
;
2804 h
->u
.c
.p
->section
= bfd_make_section_old_way (symbfd
,
2809 /* Adjust the size of the common symbol if
2811 if (value
> h
->u
.c
.size
)
2812 h
->u
.c
.size
= value
;
2818 /* We do not need this object file. */
2822 /* Check a single archive element to see if we need to include it in
2823 the link. *PNEEDED is set according to whether this element is
2824 needed in the link or not. This is called from
2825 _bfd_generic_link_add_archive_symbols. */
2828 aout_link_check_archive_element (bfd
*abfd
,
2829 struct bfd_link_info
*info
,
2830 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
2831 const char *name ATTRIBUTE_UNUSED
,
2837 if (!aout_get_external_symbols (abfd
))
2841 if (!aout_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
2847 /* Potentially, the add_archive_element hook may have set a
2848 substitute BFD for us. */
2851 if (!info
->keep_memory
2852 && !aout_link_free_symbols (oldbfd
))
2854 if (!aout_get_external_symbols (abfd
))
2857 if (!aout_link_add_symbols (abfd
, info
))
2861 if (!info
->keep_memory
|| !needed
)
2863 if (!aout_link_free_symbols (abfd
))
2870 /* Add all symbols from an object file to the hash table. */
2873 aout_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2875 bool (*add_one_symbol
)
2876 (struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
2877 bfd_vma
, const char *, bool, bool, struct bfd_link_hash_entry
**);
2878 struct external_nlist
*syms
;
2879 bfd_size_type sym_count
;
2882 struct aout_link_hash_entry
**sym_hash
;
2883 struct external_nlist
*p
;
2884 struct external_nlist
*pend
;
2886 syms
= obj_aout_external_syms (abfd
);
2887 sym_count
= obj_aout_external_sym_count (abfd
);
2888 strings
= obj_aout_external_strings (abfd
);
2889 if (info
->keep_memory
)
2894 if (aout_backend_info (abfd
)->add_dynamic_symbols
!= NULL
)
2896 if (! ((*aout_backend_info (abfd
)->add_dynamic_symbols
)
2897 (abfd
, info
, &syms
, &sym_count
, &strings
)))
2901 /* We keep a list of the linker hash table entries that correspond
2902 to particular symbols. We could just look them up in the hash
2903 table, but keeping the list is more efficient. Perhaps this
2904 should be conditional on info->keep_memory. */
2905 sym_hash
= bfd_alloc (abfd
,
2906 sym_count
* sizeof (struct aout_link_hash_entry
*));
2907 if (sym_hash
== NULL
&& sym_count
!= 0)
2909 obj_aout_sym_hashes (abfd
) = sym_hash
;
2911 add_one_symbol
= aout_backend_info (abfd
)->add_one_symbol
;
2912 if (add_one_symbol
== NULL
)
2913 add_one_symbol
= _bfd_generic_link_add_one_symbol
;
2916 pend
= p
+ sym_count
;
2917 for (; p
< pend
; p
++, sym_hash
++)
2928 type
= H_GET_8 (abfd
, p
->e_type
);
2930 /* PR 19629: Corrupt binaries can contain illegal string offsets. */
2931 if (GET_WORD (abfd
, p
->e_strx
) >= obj_aout_external_string_size (abfd
))
2933 name
= strings
+ GET_WORD (abfd
, p
->e_strx
);
2935 /* Ignore debugging symbols. */
2936 if (is_stab (type
, name
))
2939 value
= GET_WORD (abfd
, p
->e_value
);
2945 /* Shouldn't be any types not covered. */
2956 /* Ignore symbols that are not externally visible. */
2959 case N_UNDF
| N_EXT
:
2962 section
= bfd_und_section_ptr
;
2966 section
= bfd_com_section_ptr
;
2969 section
= bfd_abs_section_ptr
;
2971 case N_TEXT
| N_EXT
:
2972 section
= obj_textsec (abfd
);
2973 value
-= bfd_section_vma (section
);
2975 case N_DATA
| N_EXT
:
2976 /* Treat N_SETV symbols as N_DATA symbol; see comment in
2977 translate_from_native_sym_flags. */
2978 section
= obj_datasec (abfd
);
2979 value
-= bfd_section_vma (section
);
2982 section
= obj_bsssec (abfd
);
2983 value
-= bfd_section_vma (section
);
2987 if (! ((*add_one_symbol
)
2988 (info
, abfd
, name
, flags
, section
, value
, string
, copy
, false,
2989 (struct bfd_link_hash_entry
**) sym_hash
)))
2992 /* Restrict the maximum alignment of a common symbol based on
2993 the architecture, since a.out has no way to represent
2994 alignment requirements of a section in a .o file. FIXME:
2995 This isn't quite right: it should use the architecture of the
2996 output file, not the input files. */
2997 if ((*sym_hash
)->root
.type
== bfd_link_hash_common
2998 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
>
2999 bfd_get_arch_info (abfd
)->section_align_power
))
3000 (*sym_hash
)->root
.u
.c
.p
->alignment_power
=
3001 bfd_get_arch_info (abfd
)->section_align_power
;
3003 /* If this is a set symbol, and we are not building sets, then
3004 it is possible for the hash entry to not have been set. In
3005 such a case, treat the symbol as not globally defined. */
3006 if ((*sym_hash
)->root
.type
== bfd_link_hash_new
)
3008 BFD_ASSERT ((flags
& BSF_CONSTRUCTOR
) != 0);
3016 /* Look up an entry in an the header file hash table. */
3018 #define aout_link_includes_lookup(table, string, create, copy) \
3019 ((struct aout_link_includes_entry *) \
3020 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
3022 /* The function to create a new entry in the header file hash table. */
3024 static struct bfd_hash_entry
*
3025 aout_link_includes_newfunc (struct bfd_hash_entry
*entry
,
3026 struct bfd_hash_table
*table
,
3029 struct aout_link_includes_entry
* ret
=
3030 (struct aout_link_includes_entry
*) entry
;
3032 /* Allocate the structure if it has not already been allocated by a
3035 ret
= bfd_hash_allocate (table
,
3036 sizeof (struct aout_link_includes_entry
));
3040 /* Call the allocation method of the superclass. */
3041 ret
= ((struct aout_link_includes_entry
*)
3042 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
3044 /* Set local fields. */
3047 return (struct bfd_hash_entry
*) ret
;
3050 /* Write out a symbol that was not associated with an a.out input
3054 aout_link_write_other_symbol (struct bfd_hash_entry
*bh
, void *data
)
3056 struct aout_link_hash_entry
*h
= (struct aout_link_hash_entry
*) bh
;
3057 struct aout_final_link_info
*flaginfo
= (struct aout_final_link_info
*) data
;
3061 struct external_nlist outsym
;
3065 if (h
->root
.type
== bfd_link_hash_warning
)
3067 h
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
3068 if (h
->root
.type
== bfd_link_hash_new
)
3072 output_bfd
= flaginfo
->output_bfd
;
3074 if (aout_backend_info (output_bfd
)->write_dynamic_symbol
!= NULL
)
3076 if (! ((*aout_backend_info (output_bfd
)->write_dynamic_symbol
)
3077 (output_bfd
, flaginfo
->info
, h
)))
3079 /* FIXME: No way to handle errors. */
3089 /* An indx of -2 means the symbol must be written. */
3091 && (flaginfo
->info
->strip
== strip_all
3092 || (flaginfo
->info
->strip
== strip_some
3093 && bfd_hash_lookup (flaginfo
->info
->keep_hash
, h
->root
.root
.string
,
3094 false, false) == NULL
)))
3097 switch (h
->root
.type
)
3101 /* Avoid variable not initialized warnings. */
3103 case bfd_link_hash_new
:
3104 /* This can happen for set symbols when sets are not being
3107 case bfd_link_hash_undefined
:
3108 type
= N_UNDF
| N_EXT
;
3111 case bfd_link_hash_defined
:
3112 case bfd_link_hash_defweak
:
3116 sec
= h
->root
.u
.def
.section
->output_section
;
3117 BFD_ASSERT (bfd_is_abs_section (sec
)
3118 || sec
->owner
== output_bfd
);
3119 if (sec
== obj_textsec (output_bfd
))
3120 type
= h
->root
.type
== bfd_link_hash_defined
? N_TEXT
: N_WEAKT
;
3121 else if (sec
== obj_datasec (output_bfd
))
3122 type
= h
->root
.type
== bfd_link_hash_defined
? N_DATA
: N_WEAKD
;
3123 else if (sec
== obj_bsssec (output_bfd
))
3124 type
= h
->root
.type
== bfd_link_hash_defined
? N_BSS
: N_WEAKB
;
3126 type
= h
->root
.type
== bfd_link_hash_defined
? N_ABS
: N_WEAKA
;
3128 val
= (h
->root
.u
.def
.value
3130 + h
->root
.u
.def
.section
->output_offset
);
3133 case bfd_link_hash_common
:
3134 type
= N_UNDF
| N_EXT
;
3135 val
= h
->root
.u
.c
.size
;
3137 case bfd_link_hash_undefweak
:
3141 case bfd_link_hash_indirect
:
3142 case bfd_link_hash_warning
:
3143 /* FIXME: Ignore these for now. The circumstances under which
3144 they should be written out are not clear to me. */
3148 H_PUT_8 (output_bfd
, type
, outsym
.e_type
);
3149 H_PUT_8 (output_bfd
, 0, outsym
.e_ovly
);
3150 indx
= add_to_stringtab (output_bfd
, flaginfo
->strtab
, h
->root
.root
.string
,
3152 if (indx
== (bfd_size_type
) -1)
3153 /* FIXME: No way to handle errors. */
3156 PUT_WORD (output_bfd
, 0, outsym
.e_desc
);
3157 PUT_WORD (output_bfd
, indx
, outsym
.e_strx
);
3158 PUT_WORD (output_bfd
, val
, outsym
.e_value
);
3160 amt
= EXTERNAL_NLIST_SIZE
;
3161 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0
3162 || bfd_bwrite ((void *) &outsym
, amt
, output_bfd
) != amt
)
3163 /* FIXME: No way to handle errors. */
3166 flaginfo
->symoff
+= amt
;
3167 h
->indx
= obj_aout_external_sym_count (output_bfd
);
3168 ++obj_aout_external_sym_count (output_bfd
);
3173 /* Handle a link order which is supposed to generate a reloc. */
3176 aout_link_reloc_link_order (struct aout_final_link_info
*flaginfo
,
3178 struct bfd_link_order
*p
)
3180 struct bfd_link_order_reloc
*pr
;
3183 reloc_howto_type
*howto
;
3184 file_ptr
*reloff_ptr
;
3185 struct reloc_std_external srel
;
3187 bfd_size_type rel_size
;
3191 if (p
->type
== bfd_section_reloc_link_order
)
3194 if (bfd_is_abs_section (pr
->u
.section
))
3195 r_index
= N_ABS
| N_EXT
;
3198 BFD_ASSERT (pr
->u
.section
->owner
== flaginfo
->output_bfd
);
3199 r_index
= pr
->u
.section
->target_index
;
3204 struct aout_link_hash_entry
*h
;
3206 BFD_ASSERT (p
->type
== bfd_symbol_reloc_link_order
);
3208 h
= ((struct aout_link_hash_entry
*)
3209 bfd_wrapped_link_hash_lookup (flaginfo
->output_bfd
, flaginfo
->info
,
3210 pr
->u
.name
, false, false, true));
3216 /* We decided to strip this symbol, but it turns out that we
3217 can't. Note that we lose the other and desc information
3218 here. I don't think that will ever matter for a global
3222 if (!aout_link_write_other_symbol (&h
->root
.root
, flaginfo
))
3228 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3229 (flaginfo
->info
, pr
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
3234 howto
= bfd_reloc_type_lookup (flaginfo
->output_bfd
, pr
->reloc
);
3237 bfd_set_error (bfd_error_bad_value
);
3241 if (o
== obj_textsec (flaginfo
->output_bfd
))
3242 reloff_ptr
= &flaginfo
->treloff
;
3243 else if (o
== obj_datasec (flaginfo
->output_bfd
))
3244 reloff_ptr
= &flaginfo
->dreloff
;
3249 MY_put_reloc(flaginfo
->output_bfd
, r_extern
, r_index
, p
->offset
, howto
,
3259 fprintf (stderr
, "TODO: line %d in bfd/pdp11.c\n", __LINE__
);
3261 r_pcrel
= howto
->pc_relative
;
3262 r_baserel
= (howto
->type
& 8) != 0;
3263 r_jmptable
= (howto
->type
& 16) != 0;
3264 r_relative
= (howto
->type
& 32) != 0;
3265 r_length
= howto
->size
;
3267 PUT_WORD (flaginfo
->output_bfd
, p
->offset
, srel
.r_address
);
3268 if (bfd_header_big_endian (flaginfo
->output_bfd
))
3270 srel
.r_index
[0] = r_index
>> 16;
3271 srel
.r_index
[1] = r_index
>> 8;
3272 srel
.r_index
[2] = r_index
;
3274 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
3275 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
3276 | (r_baserel
? RELOC_STD_BITS_BASEREL_BIG
: 0)
3277 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_BIG
: 0)
3278 | (r_relative
? RELOC_STD_BITS_RELATIVE_BIG
: 0)
3279 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
3283 srel
.r_index
[2] = r_index
>> 16;
3284 srel
.r_index
[1] = r_index
>> 8;
3285 srel
.r_index
[0] = r_index
;
3287 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
3288 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
3289 | (r_baserel
? RELOC_STD_BITS_BASEREL_LITTLE
: 0)
3290 | (r_jmptable
? RELOC_STD_BITS_JMPTABLE_LITTLE
: 0)
3291 | (r_relative
? RELOC_STD_BITS_RELATIVE_LITTLE
: 0)
3292 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
3296 rel_ptr
= (void *) &srel
;
3298 /* We have to write the addend into the object file, since
3299 standard a.out relocs are in place. It would be more
3300 reliable if we had the current contents of the file here,
3301 rather than assuming zeroes, but we can't read the file since
3302 it was opened using bfd_openw. */
3303 if (pr
->addend
!= 0)
3306 bfd_reloc_status_type r
;
3310 size
= bfd_get_reloc_size (howto
);
3311 buf
= bfd_zmalloc (size
);
3312 if (buf
== NULL
&& size
!= 0)
3314 r
= MY_relocate_contents (howto
, flaginfo
->output_bfd
,
3321 case bfd_reloc_outofrange
:
3323 case bfd_reloc_overflow
:
3324 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3325 (flaginfo
->info
, NULL
,
3326 (p
->type
== bfd_section_reloc_link_order
3327 ? bfd_section_name (pr
->u
.section
)
3329 howto
->name
, pr
->addend
, NULL
,
3330 (asection
*) NULL
, (bfd_vma
) 0);
3333 ok
= bfd_set_section_contents (flaginfo
->output_bfd
, o
,
3335 (file_ptr
) p
->offset
,
3342 rel_size
= obj_reloc_entry_size (flaginfo
->output_bfd
);
3343 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0
3344 || bfd_bwrite (rel_ptr
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
3347 *reloff_ptr
+= rel_size
;
3349 /* Assert that the relocs have not run into the symbols, and that n
3350 the text relocs have not run into the data relocs. */
3351 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3352 && (reloff_ptr
!= &flaginfo
->treloff
3354 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3359 /* Get the section corresponding to a reloc index. */
3361 static inline asection
*
3362 aout_reloc_type_to_section (bfd
*abfd
, int type
)
3366 case RTEXT
: return obj_textsec (abfd
);
3367 case RDATA
: return obj_datasec (abfd
);
3368 case RBSS
: return obj_bsssec (abfd
);
3369 case RABS
: return bfd_abs_section_ptr
;
3370 case REXT
: return bfd_und_section_ptr
;
3376 pdp11_aout_link_input_section (struct aout_final_link_info
*flaginfo
,
3378 asection
*input_section
,
3380 bfd_size_type rel_size
,
3383 bool (*check_dynamic_reloc
)
3384 (struct bfd_link_info
*, bfd
*, asection
*,
3385 struct aout_link_hash_entry
*, void *, bfd_byte
*, bool *, bfd_vma
*);
3388 struct external_nlist
*syms
;
3390 struct aout_link_hash_entry
**sym_hashes
;
3395 output_bfd
= flaginfo
->output_bfd
;
3396 check_dynamic_reloc
= aout_backend_info (output_bfd
)->check_dynamic_reloc
;
3398 BFD_ASSERT (obj_reloc_entry_size (input_bfd
) == RELOC_SIZE
);
3399 BFD_ASSERT (input_bfd
->xvec
->header_byteorder
3400 == output_bfd
->xvec
->header_byteorder
);
3402 relocatable
= bfd_link_relocatable (flaginfo
->info
);
3403 syms
= obj_aout_external_syms (input_bfd
);
3404 strings
= obj_aout_external_strings (input_bfd
);
3405 sym_hashes
= obj_aout_sym_hashes (input_bfd
);
3406 symbol_map
= flaginfo
->symbol_map
;
3409 rel_end
= rel
+ rel_size
;
3410 for (; rel
< rel_end
; rel
+= RELOC_SIZE
)
3417 reloc_howto_type
*howto
;
3418 struct aout_link_hash_entry
*h
= NULL
;
3420 bfd_reloc_status_type r
;
3423 reloc_entry
= GET_WORD (input_bfd
, (void *) rel
);
3424 if (reloc_entry
== 0)
3428 unsigned int howto_idx
;
3430 r_index
= (reloc_entry
& RIDXMASK
) >> 4;
3431 r_type
= reloc_entry
& RTYPE
;
3432 r_pcrel
= reloc_entry
& RELFLG
;
3433 r_addr
= (char *) rel
- (char *) relocs
;
3435 r_extern
= (r_type
== REXT
);
3437 howto_idx
= r_pcrel
;
3438 if (howto_idx
< TABLE_SIZE (howto_table_pdp11
))
3439 howto
= howto_table_pdp11
+ howto_idx
;
3442 _bfd_error_handler (_("%pB: unsupported relocation type"),
3444 bfd_set_error (bfd_error_bad_value
);
3451 /* We are generating a relocatable output file, and must
3452 modify the reloc accordingly. */
3455 /* If we know the symbol this relocation is against,
3456 convert it into a relocation against a section. This
3457 is what the native linker does. */
3458 h
= sym_hashes
[r_index
];
3460 && (h
->root
.type
== bfd_link_hash_defined
3461 || h
->root
.type
== bfd_link_hash_defweak
))
3463 asection
*output_section
;
3465 /* Compute a new r_index. */
3466 output_section
= h
->root
.u
.def
.section
->output_section
;
3467 if (output_section
== obj_textsec (output_bfd
))
3469 else if (output_section
== obj_datasec (output_bfd
))
3471 else if (output_section
== obj_bsssec (output_bfd
))
3476 /* Add the symbol value and the section VMA to the
3477 addend stored in the contents. */
3478 relocation
= (h
->root
.u
.def
.value
3479 + output_section
->vma
3480 + h
->root
.u
.def
.section
->output_offset
);
3484 /* We must change r_index according to the symbol
3486 r_index
= symbol_map
[r_index
];
3492 /* We decided to strip this symbol, but it
3493 turns out that we can't. Note that we
3494 lose the other and desc information here.
3495 I don't think that will ever matter for a
3501 if (!aout_link_write_other_symbol (&h
->root
.root
,
3511 name
= strings
+ GET_WORD (input_bfd
,
3512 syms
[r_index
].e_strx
);
3513 (*flaginfo
->info
->callbacks
->unattached_reloc
)
3514 (flaginfo
->info
, name
, input_bfd
, input_section
,
3523 /* Write out the new r_index value. */
3524 reloc_entry
= GET_WORD (input_bfd
, rel
);
3525 reloc_entry
&= RIDXMASK
;
3526 reloc_entry
|= r_index
<< 4;
3527 PUT_WORD (input_bfd
, reloc_entry
, rel
);
3533 /* This is a relocation against a section. We must
3534 adjust by the amount that the section moved. */
3535 section
= aout_reloc_type_to_section (input_bfd
, r_type
);
3536 relocation
= (section
->output_section
->vma
3537 + section
->output_offset
3541 /* Change the address of the relocation. */
3542 fprintf (stderr
, "TODO: change the address of the relocation\n");
3544 /* Adjust a PC relative relocation by removing the reference
3545 to the original address in the section and including the
3546 reference to the new address. */
3548 relocation
-= (input_section
->output_section
->vma
3549 + input_section
->output_offset
3550 - input_section
->vma
);
3552 #ifdef MY_relocatable_reloc
3553 MY_relocatable_reloc (howto
, output_bfd
, rel
, relocation
, r_addr
);
3556 if (relocation
== 0)
3559 r
= MY_relocate_contents (howto
,
3560 input_bfd
, relocation
,
3567 /* We are generating an executable, and must do a full
3572 h
= sym_hashes
[r_index
];
3575 && (h
->root
.type
== bfd_link_hash_defined
3576 || h
->root
.type
== bfd_link_hash_defweak
))
3578 relocation
= (h
->root
.u
.def
.value
3579 + h
->root
.u
.def
.section
->output_section
->vma
3580 + h
->root
.u
.def
.section
->output_offset
);
3583 && h
->root
.type
== bfd_link_hash_undefweak
)
3595 section
= aout_reloc_type_to_section (input_bfd
, r_type
);
3596 relocation
= (section
->output_section
->vma
3597 + section
->output_offset
3600 relocation
+= input_section
->vma
;
3603 if (check_dynamic_reloc
!= NULL
)
3607 if (! ((*check_dynamic_reloc
)
3608 (flaginfo
->info
, input_bfd
, input_section
, h
,
3609 (void *) rel
, contents
, &skip
, &relocation
)))
3615 /* Now warn if a global symbol is undefined. We could not
3616 do this earlier, because check_dynamic_reloc might want
3617 to skip this reloc. */
3618 if (hundef
&& ! bfd_link_pic (flaginfo
->info
))
3623 name
= h
->root
.root
.string
;
3625 name
= strings
+ GET_WORD (input_bfd
, syms
[r_index
].e_strx
);
3626 (*flaginfo
->info
->callbacks
->undefined_symbol
)
3627 (flaginfo
->info
, name
, input_bfd
, input_section
,
3631 r
= MY_final_link_relocate (howto
,
3632 input_bfd
, input_section
,
3633 contents
, r_addr
, relocation
,
3637 if (r
!= bfd_reloc_ok
)
3642 case bfd_reloc_outofrange
:
3644 case bfd_reloc_overflow
:
3651 name
= strings
+ GET_WORD (input_bfd
,
3652 syms
[r_index
].e_strx
);
3657 s
= aout_reloc_type_to_section (input_bfd
, r_type
);
3658 name
= bfd_section_name (s
);
3660 (*flaginfo
->info
->callbacks
->reloc_overflow
)
3661 (flaginfo
->info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3662 (bfd_vma
) 0, input_bfd
, input_section
, r_addr
);
3672 /* Link an a.out section into the output file. */
3675 aout_link_input_section (struct aout_final_link_info
*flaginfo
,
3677 asection
*input_section
,
3678 file_ptr
*reloff_ptr
,
3679 bfd_size_type rel_size
)
3681 bfd_size_type input_size
;
3684 /* Get the section contents. */
3685 input_size
= input_section
->size
;
3686 if (! bfd_get_section_contents (input_bfd
, input_section
,
3687 (void *) flaginfo
->contents
,
3688 (file_ptr
) 0, input_size
))
3691 /* Read in the relocs if we haven't already done it. */
3692 if (aout_section_data (input_section
) != NULL
3693 && aout_section_data (input_section
)->relocs
!= NULL
)
3694 relocs
= aout_section_data (input_section
)->relocs
;
3697 relocs
= flaginfo
->relocs
;
3700 if (bfd_seek (input_bfd
, input_section
->rel_filepos
, SEEK_SET
) != 0
3701 || bfd_bread (relocs
, rel_size
, input_bfd
) != rel_size
)
3706 /* Relocate the section contents. */
3707 if (! pdp11_aout_link_input_section (flaginfo
, input_bfd
, input_section
,
3708 (bfd_byte
*) relocs
,
3709 rel_size
, flaginfo
->contents
))
3712 /* Write out the section contents. */
3713 if (! bfd_set_section_contents (flaginfo
->output_bfd
,
3714 input_section
->output_section
,
3715 (void *) flaginfo
->contents
,
3716 (file_ptr
) input_section
->output_offset
,
3720 /* If we are producing relocatable output, the relocs were
3721 modified, and we now write them out. */
3722 if (bfd_link_relocatable (flaginfo
->info
) && rel_size
> 0)
3724 if (bfd_seek (flaginfo
->output_bfd
, *reloff_ptr
, SEEK_SET
) != 0)
3726 if (bfd_bwrite (relocs
, rel_size
, flaginfo
->output_bfd
) != rel_size
)
3728 *reloff_ptr
+= rel_size
;
3730 /* Assert that the relocs have not run into the symbols, and
3731 that if these are the text relocs they have not run into the
3733 BFD_ASSERT (*reloff_ptr
<= obj_sym_filepos (flaginfo
->output_bfd
)
3734 && (reloff_ptr
!= &flaginfo
->treloff
3736 <= obj_datasec (flaginfo
->output_bfd
)->rel_filepos
)));
3742 /* Link an a.out input BFD into the output file. */
3745 aout_link_input_bfd (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
3747 BFD_ASSERT (bfd_get_format (input_bfd
) == bfd_object
);
3749 /* If this is a dynamic object, it may need special handling. */
3750 if ((input_bfd
->flags
& DYNAMIC
) != 0
3751 && aout_backend_info (input_bfd
)->link_dynamic_object
!= NULL
)
3752 return ((*aout_backend_info (input_bfd
)->link_dynamic_object
)
3753 (flaginfo
->info
, input_bfd
));
3755 /* Get the symbols. We probably have them already, unless
3756 flaginfo->info->keep_memory is FALSE. */
3757 if (! aout_get_external_symbols (input_bfd
))
3760 /* Write out the symbols and get a map of the new indices. The map
3761 is placed into flaginfo->symbol_map. */
3762 if (! aout_link_write_symbols (flaginfo
, input_bfd
))
3765 /* Relocate and write out the sections. These functions use the
3766 symbol map created by aout_link_write_symbols. The linker_mark
3767 field will be set if these sections are to be included in the
3768 link, which will normally be the case. */
3769 if (obj_textsec (input_bfd
)->linker_mark
)
3771 if (! aout_link_input_section (flaginfo
, input_bfd
,
3772 obj_textsec (input_bfd
),
3774 exec_hdr (input_bfd
)->a_trsize
))
3777 if (obj_datasec (input_bfd
)->linker_mark
)
3779 if (! aout_link_input_section (flaginfo
, input_bfd
,
3780 obj_datasec (input_bfd
),
3782 exec_hdr (input_bfd
)->a_drsize
))
3786 /* If we are not keeping memory, we don't need the symbols any
3787 longer. We still need them if we are keeping memory, because the
3788 strings in the hash table point into them. */
3789 if (! flaginfo
->info
->keep_memory
)
3791 if (! aout_link_free_symbols (input_bfd
))
3798 /* Do the final link step. This is called on the output BFD. The
3799 INFO structure should point to a list of BFDs linked through the
3800 link.next field which can be used to find each BFD which takes part
3801 in the output. Also, each section in ABFD should point to a list
3802 of bfd_link_order structures which list all the input sections for
3803 the output section. */
3806 NAME (aout
, final_link
) (bfd
*abfd
,
3807 struct bfd_link_info
*info
,
3808 void (*callback
) (bfd
*, file_ptr
*, file_ptr
*, file_ptr
*))
3810 struct aout_final_link_info aout_info
;
3811 bool includes_hash_initialized
= false;
3813 bfd_size_type trsize
, drsize
;
3814 bfd_size_type max_contents_size
;
3815 bfd_size_type max_relocs_size
;
3816 bfd_size_type max_sym_count
;
3817 struct bfd_link_order
*p
;
3819 bool have_link_order_relocs
;
3821 if (bfd_link_pic (info
))
3822 abfd
->flags
|= DYNAMIC
;
3824 separate_i_d
= info
->separate_code
;
3825 aout_info
.info
= info
;
3826 aout_info
.output_bfd
= abfd
;
3827 aout_info
.contents
= NULL
;
3828 aout_info
.relocs
= NULL
;
3829 aout_info
.symbol_map
= NULL
;
3830 aout_info
.output_syms
= NULL
;
3832 if (!bfd_hash_table_init_n (&aout_info
.includes
.root
,
3833 aout_link_includes_newfunc
,
3834 sizeof (struct aout_link_includes_entry
),
3837 includes_hash_initialized
= true;
3839 /* Figure out the largest section size. Also, if generating
3840 relocatable output, count the relocs. */
3843 max_contents_size
= 0;
3844 max_relocs_size
= 0;
3846 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3850 if (bfd_link_relocatable (info
))
3852 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
3854 trsize
+= exec_hdr (sub
)->a_trsize
;
3855 drsize
+= exec_hdr (sub
)->a_drsize
;
3859 /* FIXME: We need to identify the .text and .data sections
3860 and call get_reloc_upper_bound and canonicalize_reloc to
3861 work out the number of relocs needed, and then multiply
3862 by the reloc size. */
3864 /* xgettext:c-format */
3865 (_("%pB: relocatable link from %s to %s not supported"),
3866 abfd
, sub
->xvec
->name
, abfd
->xvec
->name
);
3867 bfd_set_error (bfd_error_invalid_operation
);
3872 if (bfd_get_flavour (sub
) == bfd_target_aout_flavour
)
3874 sz
= obj_textsec (sub
)->size
;
3875 if (sz
> max_contents_size
)
3876 max_contents_size
= sz
;
3877 sz
= obj_datasec (sub
)->size
;
3878 if (sz
> max_contents_size
)
3879 max_contents_size
= sz
;
3881 sz
= exec_hdr (sub
)->a_trsize
;
3882 if (sz
> max_relocs_size
)
3883 max_relocs_size
= sz
;
3884 sz
= exec_hdr (sub
)->a_drsize
;
3885 if (sz
> max_relocs_size
)
3886 max_relocs_size
= sz
;
3888 sz
= obj_aout_external_sym_count (sub
);
3889 if (sz
> max_sym_count
)
3894 if (bfd_link_relocatable (info
))
3896 if (obj_textsec (abfd
) != NULL
)
3897 trsize
+= (_bfd_count_link_order_relocs (obj_textsec (abfd
)
3898 ->map_head
.link_order
)
3899 * obj_reloc_entry_size (abfd
));
3900 if (obj_datasec (abfd
) != NULL
)
3901 drsize
+= (_bfd_count_link_order_relocs (obj_datasec (abfd
)
3902 ->map_head
.link_order
)
3903 * obj_reloc_entry_size (abfd
));
3906 exec_hdr (abfd
)->a_trsize
= trsize
;
3907 exec_hdr (abfd
)->a_drsize
= drsize
;
3908 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
3910 /* Adjust the section sizes and vmas according to the magic number.
3911 This sets a_text, a_data and a_bss in the exec_hdr and sets the
3912 filepos for each section. */
3913 if (! NAME (aout
, adjust_sizes_and_vmas
) (abfd
))
3916 /* The relocation and symbol file positions differ among a.out
3917 targets. We are passed a callback routine from the backend
3918 specific code to handle this.
3919 FIXME: At this point we do not know how much space the symbol
3920 table will require. This will not work for any (nonstandard)
3921 a.out target that needs to know the symbol table size before it
3922 can compute the relocation file positions. */
3923 (*callback
) (abfd
, &aout_info
.treloff
, &aout_info
.dreloff
,
3925 obj_textsec (abfd
)->rel_filepos
= aout_info
.treloff
;
3926 obj_datasec (abfd
)->rel_filepos
= aout_info
.dreloff
;
3927 obj_sym_filepos (abfd
) = aout_info
.symoff
;
3929 /* We keep a count of the symbols as we output them. */
3930 obj_aout_external_sym_count (abfd
) = 0;
3932 /* We accumulate the string table as we write out the symbols. */
3933 aout_info
.strtab
= _bfd_stringtab_init ();
3934 if (aout_info
.strtab
== NULL
)
3937 /* Allocate buffers to hold section contents and relocs. */
3938 aout_info
.contents
= bfd_malloc (max_contents_size
);
3939 aout_info
.relocs
= bfd_malloc (max_relocs_size
);
3940 aout_info
.symbol_map
= bfd_malloc (max_sym_count
* sizeof (int *));
3941 aout_info
.output_syms
= bfd_malloc ((max_sym_count
+ 1)
3942 * sizeof (struct external_nlist
));
3943 if ((aout_info
.contents
== NULL
&& max_contents_size
!= 0)
3944 || (aout_info
.relocs
== NULL
&& max_relocs_size
!= 0)
3945 || (aout_info
.symbol_map
== NULL
&& max_sym_count
!= 0)
3946 || aout_info
.output_syms
== NULL
)
3949 /* If we have a symbol named __DYNAMIC, force it out now. This is
3950 required by SunOS. Doing this here rather than in sunos.c is a
3951 hack, but it's easier than exporting everything which would be
3954 struct aout_link_hash_entry
*h
;
3956 h
= aout_link_hash_lookup (aout_hash_table (info
), "__DYNAMIC",
3957 false, false, false);
3959 aout_link_write_other_symbol (&h
->root
.root
, &aout_info
);
3962 /* The most time efficient way to do the link would be to read all
3963 the input object files into memory and then sort out the
3964 information into the output file. Unfortunately, that will
3965 probably use too much memory. Another method would be to step
3966 through everything that composes the text section and write it
3967 out, and then everything that composes the data section and write
3968 it out, and then write out the relocs, and then write out the
3969 symbols. Unfortunately, that requires reading stuff from each
3970 input file several times, and we will not be able to keep all the
3971 input files open simultaneously, and reopening them will be slow.
3973 What we do is basically process one input file at a time. We do
3974 everything we need to do with an input file once--copy over the
3975 section contents, handle the relocation information, and write
3976 out the symbols--and then we throw away the information we read
3977 from it. This approach requires a lot of lseeks of the output
3978 file, which is unfortunate but still faster than reopening a lot
3981 We use the output_has_begun field of the input BFDs to see
3982 whether we have already handled it. */
3983 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3984 sub
->output_has_begun
= false;
3986 /* Mark all sections which are to be included in the link. This
3987 will normally be every section. We need to do this so that we
3988 can identify any sections which the linker has decided to not
3990 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3992 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
3993 if (p
->type
== bfd_indirect_link_order
)
3994 p
->u
.indirect
.section
->linker_mark
= true;
3997 have_link_order_relocs
= false;
3998 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4000 for (p
= o
->map_head
.link_order
;
4004 if (p
->type
== bfd_indirect_link_order
4005 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
4006 == bfd_target_aout_flavour
))
4010 input_bfd
= p
->u
.indirect
.section
->owner
;
4011 if (! input_bfd
->output_has_begun
)
4013 if (! aout_link_input_bfd (&aout_info
, input_bfd
))
4015 input_bfd
->output_has_begun
= true;
4018 else if (p
->type
== bfd_section_reloc_link_order
4019 || p
->type
== bfd_symbol_reloc_link_order
)
4020 /* These are handled below. */
4021 have_link_order_relocs
= true;
4024 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
4030 /* Write out any symbols that we have not already written out. */
4031 bfd_hash_traverse (&info
->hash
->table
,
4032 aout_link_write_other_symbol
,
4035 /* Now handle any relocs we were asked to create by the linker.
4036 These did not come from any input file. We must do these after
4037 we have written out all the symbols, so that we know the symbol
4039 if (have_link_order_relocs
)
4041 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4043 for (p
= o
->map_head
.link_order
;
4047 if (p
->type
== bfd_section_reloc_link_order
4048 || p
->type
== bfd_symbol_reloc_link_order
)
4050 if (! aout_link_reloc_link_order (&aout_info
, o
, p
))
4057 free (aout_info
.contents
);
4058 aout_info
.contents
= NULL
;
4059 free (aout_info
.relocs
);
4060 aout_info
.relocs
= NULL
;
4061 free (aout_info
.symbol_map
);
4062 aout_info
.symbol_map
= NULL
;
4063 free (aout_info
.output_syms
);
4064 aout_info
.output_syms
= NULL
;
4065 if (includes_hash_initialized
)
4067 bfd_hash_table_free (&aout_info
.includes
.root
);
4068 includes_hash_initialized
= false;
4071 /* Finish up any dynamic linking we may be doing. */
4072 if (aout_backend_info (abfd
)->finish_dynamic_link
!= NULL
)
4074 if (! (*aout_backend_info (abfd
)->finish_dynamic_link
) (abfd
, info
))
4078 /* Update the header information. */
4079 abfd
->symcount
= obj_aout_external_sym_count (abfd
);
4080 exec_hdr (abfd
)->a_syms
= abfd
->symcount
* EXTERNAL_NLIST_SIZE
;
4081 obj_str_filepos (abfd
) = obj_sym_filepos (abfd
) + exec_hdr (abfd
)->a_syms
;
4082 obj_textsec (abfd
)->reloc_count
=
4083 exec_hdr (abfd
)->a_trsize
/ obj_reloc_entry_size (abfd
);
4084 obj_datasec (abfd
)->reloc_count
=
4085 exec_hdr (abfd
)->a_drsize
/ obj_reloc_entry_size (abfd
);
4087 /* Write out the string table, unless there are no symbols. */
4088 if (abfd
->symcount
> 0)
4090 if (bfd_seek (abfd
, obj_str_filepos (abfd
), SEEK_SET
) != 0
4091 || ! emit_stringtab (abfd
, aout_info
.strtab
))
4094 else if (obj_textsec (abfd
)->reloc_count
== 0
4095 && obj_datasec (abfd
)->reloc_count
== 0)
4097 /* The layout of a typical a.out file is header, text, data,
4098 relocs, symbols, string table. When there are no relocs,
4099 symbols or string table, the last thing in the file is data
4100 and a_data may be rounded up. However we may have a smaller
4101 sized .data section and thus not written final padding. The
4102 same thing can happen with text if there is no data. Write
4103 final padding here to extend the file. */
4106 if (exec_hdr (abfd
)->a_data
> obj_datasec (abfd
)->size
)
4107 pos
= obj_datasec (abfd
)->filepos
+ exec_hdr (abfd
)->a_data
;
4108 else if (obj_datasec (abfd
)->size
== 0
4109 && exec_hdr (abfd
)->a_text
> obj_textsec (abfd
)->size
)
4110 pos
= obj_textsec (abfd
)->filepos
+ exec_hdr (abfd
)->a_text
;
4115 if (bfd_seek (abfd
, pos
- 1, SEEK_SET
) != 0
4116 || bfd_bwrite (&b
, (bfd_size_type
) 1, abfd
) != 1)
4124 free (aout_info
.contents
);
4125 free (aout_info
.relocs
);
4126 free (aout_info
.symbol_map
);
4127 free (aout_info
.output_syms
);
4128 if (includes_hash_initialized
)
4129 bfd_hash_table_free (&aout_info
.includes
.root
);
4133 /* Adjust and write out the symbols for an a.out file. Set the new
4134 symbol indices into a symbol_map. */
4137 aout_link_write_symbols (struct aout_final_link_info
*flaginfo
, bfd
*input_bfd
)
4140 bfd_size_type sym_count
;
4142 enum bfd_link_strip strip
;
4143 enum bfd_link_discard discard
;
4144 struct external_nlist
*outsym
;
4145 bfd_size_type strtab_index
;
4146 struct external_nlist
*sym
;
4147 struct external_nlist
*sym_end
;
4148 struct aout_link_hash_entry
**sym_hash
;
4153 output_bfd
= flaginfo
->output_bfd
;
4154 sym_count
= obj_aout_external_sym_count (input_bfd
);
4155 strings
= obj_aout_external_strings (input_bfd
);
4156 strip
= flaginfo
->info
->strip
;
4157 discard
= flaginfo
->info
->discard
;
4158 outsym
= flaginfo
->output_syms
;
4160 /* First write out a symbol for this object file, unless we are
4161 discarding such symbols. */
4162 if (strip
!= strip_all
4163 && (strip
!= strip_some
4164 || bfd_hash_lookup (flaginfo
->info
->keep_hash
,
4165 bfd_get_filename (input_bfd
),
4166 false, false) != NULL
)
4167 && discard
!= discard_all
)
4169 H_PUT_8 (output_bfd
, N_TEXT
, outsym
->e_type
);
4170 H_PUT_8 (output_bfd
, 0, outsym
->e_ovly
);
4171 H_PUT_16 (output_bfd
, 0, outsym
->e_desc
);
4172 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4173 bfd_get_filename (input_bfd
), false);
4174 if (strtab_index
== (bfd_size_type
) -1)
4176 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4177 PUT_WORD (output_bfd
,
4178 (bfd_section_vma (obj_textsec (input_bfd
)->output_section
)
4179 + obj_textsec (input_bfd
)->output_offset
),
4181 ++obj_aout_external_sym_count (output_bfd
);
4187 sym
= obj_aout_external_syms (input_bfd
);
4188 sym_end
= sym
+ sym_count
;
4189 sym_hash
= obj_aout_sym_hashes (input_bfd
);
4190 symbol_map
= flaginfo
->symbol_map
;
4191 memset (symbol_map
, 0, (size_t) sym_count
* sizeof *symbol_map
);
4192 for (; sym
< sym_end
; sym
++, sym_hash
++, symbol_map
++)
4196 struct aout_link_hash_entry
*h
;
4202 /* We set *symbol_map to 0 above for all symbols. If it has
4203 already been set to -1 for this symbol, it means that we are
4204 discarding it because it appears in a duplicate header file.
4205 See the N_BINCL code below. */
4206 if (*symbol_map
== -1)
4209 /* Initialize *symbol_map to -1, which means that the symbol was
4210 not copied into the output file. We will change it later if
4211 we do copy the symbol over. */
4214 type
= H_GET_8 (input_bfd
, sym
->e_type
);
4215 name
= strings
+ GET_WORD (input_bfd
, sym
->e_strx
);
4221 /* Pass this symbol through. It is the target of an
4222 indirect or warning symbol. */
4223 val
= GET_WORD (input_bfd
, sym
->e_value
);
4228 /* Skip this symbol, which is the target of an indirect
4229 symbol that we have changed to no longer be an indirect
4236 struct aout_link_hash_entry
*hresolve
;
4238 /* We have saved the hash table entry for this symbol, if
4239 there is one. Note that we could just look it up again
4240 in the hash table, provided we first check that it is an
4244 /* Use the name from the hash table, in case the symbol was
4247 name
= h
->root
.root
.string
;
4249 /* If this is an indirect or warning symbol, then change
4250 hresolve to the base symbol. We also change *sym_hash so
4251 that the relocation routines relocate against the real
4255 && (h
->root
.type
== bfd_link_hash_indirect
4256 || h
->root
.type
== bfd_link_hash_warning
))
4258 hresolve
= (struct aout_link_hash_entry
*) h
->root
.u
.i
.link
;
4259 while (hresolve
->root
.type
== bfd_link_hash_indirect
4260 || hresolve
->root
.type
== bfd_link_hash_warning
)
4261 hresolve
= ((struct aout_link_hash_entry
*)
4262 hresolve
->root
.u
.i
.link
);
4263 *sym_hash
= hresolve
;
4266 /* If the symbol has already been written out, skip it. */
4268 && h
->root
.type
!= bfd_link_hash_warning
4271 if ((type
& N_TYPE
) == N_INDR
4272 || type
== N_WARNING
)
4274 *symbol_map
= h
->indx
;
4278 /* See if we are stripping this symbol. */
4284 case strip_debugger
:
4285 if (is_stab (type
, name
))
4289 if (bfd_hash_lookup (flaginfo
->info
->keep_hash
, name
,
4290 false, false) == NULL
)
4304 /* Get the value of the symbol. */
4305 if (is_stab (type
, name
))
4310 symsec
= bfd_abs_section_ptr
;
4318 symsec
= obj_textsec (input_bfd
);
4322 symsec
= obj_datasec (input_bfd
);
4326 symsec
= obj_bsssec (input_bfd
);
4329 val
= GET_WORD (input_bfd
, sym
->e_value
);
4331 else if ((type
& N_TYPE
) == N_TEXT
4333 symsec
= obj_textsec (input_bfd
);
4334 else if ((type
& N_TYPE
) == N_DATA
4336 symsec
= obj_datasec (input_bfd
);
4337 else if ((type
& N_TYPE
) == N_BSS
4339 symsec
= obj_bsssec (input_bfd
);
4340 else if ((type
& N_TYPE
) == N_ABS
4342 symsec
= bfd_abs_section_ptr
;
4343 else if (((type
& N_TYPE
) == N_INDR
4344 && (hresolve
== NULL
4345 || (hresolve
->root
.type
!= bfd_link_hash_defined
4346 && hresolve
->root
.type
!= bfd_link_hash_defweak
4347 && hresolve
->root
.type
!= bfd_link_hash_common
)))
4348 || type
== N_WARNING
)
4350 /* Pass the next symbol through unchanged. The
4351 condition above for indirect symbols is so that if
4352 the indirect symbol was defined, we output it with
4353 the correct definition so the debugger will
4356 val
= GET_WORD (input_bfd
, sym
->e_value
);
4361 /* If we get here with an indirect symbol, it means that
4362 we are outputting it with a real definition. In such
4363 a case we do not want to output the next symbol,
4364 which is the target of the indirection. */
4365 if ((type
& N_TYPE
) == N_INDR
)
4370 /* We need to get the value from the hash table. We use
4371 hresolve so that if we have defined an indirect
4372 symbol we output the final definition. */
4375 switch (type
& N_TYPE
)
4378 symsec
= obj_textsec (input_bfd
);
4381 symsec
= obj_datasec (input_bfd
);
4384 symsec
= obj_bsssec (input_bfd
);
4387 symsec
= bfd_abs_section_ptr
;
4394 else if (hresolve
->root
.type
== bfd_link_hash_defined
4395 || hresolve
->root
.type
== bfd_link_hash_defweak
)
4397 asection
*input_section
;
4398 asection
*output_section
;
4400 /* This case usually means a common symbol which was
4401 turned into a defined symbol. */
4402 input_section
= hresolve
->root
.u
.def
.section
;
4403 output_section
= input_section
->output_section
;
4404 BFD_ASSERT (bfd_is_abs_section (output_section
)
4405 || output_section
->owner
== output_bfd
);
4406 val
= (hresolve
->root
.u
.def
.value
4407 + bfd_section_vma (output_section
)
4408 + input_section
->output_offset
);
4410 /* Get the correct type based on the section. If
4411 this is a constructed set, force it to be
4412 globally visible. */
4421 if (output_section
== obj_textsec (output_bfd
))
4422 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
4425 else if (output_section
== obj_datasec (output_bfd
))
4426 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
4429 else if (output_section
== obj_bsssec (output_bfd
))
4430 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
4434 type
|= (hresolve
->root
.type
== bfd_link_hash_defined
4438 else if (hresolve
->root
.type
== bfd_link_hash_common
)
4439 val
= hresolve
->root
.u
.c
.size
;
4440 else if (hresolve
->root
.type
== bfd_link_hash_undefweak
)
4449 val
= (symsec
->output_section
->vma
4450 + symsec
->output_offset
4451 + (GET_WORD (input_bfd
, sym
->e_value
)
4454 /* If this is a global symbol set the written flag, and if
4455 it is a local symbol see if we should discard it. */
4459 h
->indx
= obj_aout_external_sym_count (output_bfd
);
4461 else if ((type
& N_TYPE
) != N_SETT
4462 && (type
& N_TYPE
) != N_SETD
4463 && (type
& N_TYPE
) != N_SETB
4464 && (type
& N_TYPE
) != N_SETA
)
4469 case discard_sec_merge
:
4472 if (!is_stab (type
, name
)
4473 && bfd_is_local_label_name (input_bfd
, name
))
4487 /* An N_BINCL symbol indicates the start of the stabs
4488 entries for a header file. We need to scan ahead to the
4489 next N_EINCL symbol, ignoring nesting, adding up all the
4490 characters in the symbol names, not including the file
4491 numbers in types (the first number after an open
4493 if (type
== N_BINCL
)
4495 struct external_nlist
*incl_sym
;
4497 struct aout_link_includes_entry
*incl_entry
;
4498 struct aout_link_includes_totals
*t
;
4502 for (incl_sym
= sym
+ 1; incl_sym
< sym_end
; incl_sym
++)
4506 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
4507 if (incl_type
== N_EINCL
)
4513 else if (incl_type
== N_BINCL
)
4519 s
= strings
+ GET_WORD (input_bfd
, incl_sym
->e_strx
);
4520 for (; *s
!= '\0'; s
++)
4525 /* Skip the file number. */
4527 while (ISDIGIT (*s
))
4535 /* If we have already included a header file with the
4536 same value, then replace this one with an N_EXCL
4538 copy
= ! flaginfo
->info
->keep_memory
;
4539 incl_entry
= aout_link_includes_lookup (&flaginfo
->includes
,
4541 if (incl_entry
== NULL
)
4543 for (t
= incl_entry
->totals
; t
!= NULL
; t
= t
->next
)
4544 if (t
->total
== val
)
4548 /* This is the first time we have seen this header
4549 file with this set of stabs strings. */
4550 t
= bfd_hash_allocate (&flaginfo
->includes
.root
,
4555 t
->next
= incl_entry
->totals
;
4556 incl_entry
->totals
= t
;
4562 /* This is a duplicate header file. We must change
4563 it to be an N_EXCL entry, and mark all the
4564 included symbols to prevent outputting them. */
4568 for (incl_sym
= sym
+ 1, incl_map
= symbol_map
+ 1;
4570 incl_sym
++, incl_map
++)
4574 incl_type
= H_GET_8 (input_bfd
, incl_sym
->e_type
);
4575 if (incl_type
== N_EINCL
)
4584 else if (incl_type
== N_BINCL
)
4593 /* Copy this symbol into the list of symbols we are going to
4595 H_PUT_8 (output_bfd
, type
, outsym
->e_type
);
4596 H_PUT_8 (output_bfd
, H_GET_8 (input_bfd
, sym
->e_ovly
), outsym
->e_ovly
);
4597 H_PUT_16 (output_bfd
, H_GET_16 (input_bfd
, sym
->e_desc
), outsym
->e_desc
);
4599 if (! flaginfo
->info
->keep_memory
)
4601 /* name points into a string table which we are going to
4602 free. If there is a hash table entry, use that string.
4603 Otherwise, copy name into memory. */
4605 name
= h
->root
.root
.string
;
4609 strtab_index
= add_to_stringtab (output_bfd
, flaginfo
->strtab
,
4611 if (strtab_index
== (bfd_size_type
) -1)
4613 PUT_WORD (output_bfd
, strtab_index
, outsym
->e_strx
);
4614 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
4615 *symbol_map
= obj_aout_external_sym_count (output_bfd
);
4616 ++obj_aout_external_sym_count (output_bfd
);
4620 /* Write out the output symbols we have just constructed. */
4621 if (outsym
> flaginfo
->output_syms
)
4625 if (bfd_seek (output_bfd
, flaginfo
->symoff
, SEEK_SET
) != 0)
4627 size
= outsym
- flaginfo
->output_syms
;
4628 size
*= EXTERNAL_NLIST_SIZE
;
4629 if (bfd_bwrite ((void *) flaginfo
->output_syms
, size
, output_bfd
) != size
)
4631 flaginfo
->symoff
+= size
;
4637 /* Write out a symbol that was not associated with an a.out input
4641 bfd_getp32 (const void *p
)
4643 const bfd_byte
*addr
= p
;
4646 v
= (unsigned long) addr
[1] << 24;
4647 v
|= (unsigned long) addr
[0] << 16;
4648 v
|= (unsigned long) addr
[3] << 8;
4649 v
|= (unsigned long) addr
[2];
4653 #define COERCE32(x) (((bfd_signed_vma) (x) ^ 0x80000000) - 0x80000000)
4655 static bfd_signed_vma
4656 bfd_getp_signed_32 (const void *p
)
4658 const bfd_byte
*addr
= p
;
4661 v
= (unsigned long) addr
[1] << 24;
4662 v
|= (unsigned long) addr
[0] << 16;
4663 v
|= (unsigned long) addr
[3] << 8;
4664 v
|= (unsigned long) addr
[2];
4665 return COERCE32 (v
);
4669 bfd_putp32 (bfd_vma data
, void *p
)
4673 addr
[0] = (data
>> 16) & 0xff;
4674 addr
[1] = (data
>> 24) & 0xff;
4675 addr
[2] = (data
>> 0) & 0xff;
4676 addr
[3] = (data
>> 8) & 0xff;
4679 const bfd_target
MY (vec
) =
4681 TARGETNAME
, /* Name. */
4682 bfd_target_aout_flavour
,
4683 BFD_ENDIAN_LITTLE
, /* Target byte order (little). */
4684 BFD_ENDIAN_LITTLE
, /* Target headers byte order (little). */
4685 (HAS_RELOC
| EXEC_P
| /* Object flags. */
4686 HAS_LINENO
| HAS_DEBUG
|
4687 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
),
4688 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
| SEC_CODE
| SEC_DATA
),
4689 MY_symbol_leading_char
,
4690 AR_PAD_CHAR
, /* AR_pad_char. */
4691 15, /* AR_max_namelen. */
4692 0, /* match priority. */
4693 TARGET_KEEP_UNUSED_SECTION_SYMBOLS
, /* keep unused section symbols. */
4694 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
4695 bfd_getp32
, bfd_getp_signed_32
, bfd_putp32
,
4696 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* Data. */
4697 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
4698 bfd_getp32
, bfd_getp_signed_32
, bfd_putp32
,
4699 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* Headers. */
4700 { /* bfd_check_format. */
4703 bfd_generic_archive_p
,
4706 { /* bfd_set_format. */
4707 _bfd_bool_bfd_false_error
,
4709 _bfd_generic_mkarchive
,
4710 _bfd_bool_bfd_false_error
4712 { /* bfd_write_contents. */
4713 _bfd_bool_bfd_false_error
,
4714 MY_write_object_contents
,
4715 _bfd_write_archive_contents
,
4716 _bfd_bool_bfd_false_error
4719 BFD_JUMP_TABLE_GENERIC (MY
),
4720 BFD_JUMP_TABLE_COPY (MY
),
4721 BFD_JUMP_TABLE_CORE (MY
),
4722 BFD_JUMP_TABLE_ARCHIVE (MY
),
4723 BFD_JUMP_TABLE_SYMBOLS (MY
),
4724 BFD_JUMP_TABLE_RELOCS (MY
),
4725 BFD_JUMP_TABLE_WRITE (MY
),
4726 BFD_JUMP_TABLE_LINK (MY
),
4727 BFD_JUMP_TABLE_DYNAMIC (MY
),
4729 /* Alternative_target. */
4732 (void *) MY_backend_data