1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 Most of this hacked by Steve Chamberlain,
30 BFD supports a number of different flavours of coff format.
31 The major differences between formats are the sizes and
32 alignments of fields in structures on disk, and the occasional
35 Coff in all its varieties is implemented with a few common
36 files and a number of implementation specific files. For
37 example, The 88k bcs coff format is implemented in the file
38 @file{coff-m88k.c}. This file @code{#include}s
39 @file{coff/m88k.h} which defines the external structure of the
40 coff format for the 88k, and @file{coff/internal.h} which
41 defines the internal structure. @file{coff-m88k.c} also
42 defines the relocations used by the 88k format
45 The Intel i960 processor version of coff is implemented in
46 @file{coff-i960.c}. This file has the same structure as
47 @file{coff-m88k.c}, except that it includes @file{coff/i960.h}
48 rather than @file{coff-m88k.h}.
51 Porting to a new version of coff
53 The recommended method is to select from the existing
54 implementations the version of coff which is most like the one
55 you want to use. For example, we'll say that i386 coff is
56 the one you select, and that your coff flavour is called foo.
57 Copy @file{i386coff.c} to @file{foocoff.c}, copy
58 @file{../include/coff/i386.h} to @file{../include/coff/foo.h},
59 and add the lines to @file{targets.c} and @file{Makefile.in}
60 so that your new back end is used. Alter the shapes of the
61 structures in @file{../include/coff/foo.h} so that they match
62 what you need. You will probably also have to add
63 @code{#ifdef}s to the code in @file{coff/internal.h} and
64 @file{coffcode.h} if your version of coff is too wild.
66 You can verify that your new BFD backend works quite simply by
67 building @file{objdump} from the @file{binutils} directory,
68 and making sure that its version of what's going on and your
69 host system's idea (assuming it has the pretty standard coff
70 dump utility, usually called @code{att-dump} or just
71 @code{dump}) are the same. Then clean up your code, and send
72 what you've done to Cygnus. Then your stuff will be in the
73 next release, and you won't have to keep integrating it.
76 How the coff backend works
81 The Coff backend is split into generic routines that are
82 applicable to any Coff target and routines that are specific
83 to a particular target. The target-specific routines are
84 further split into ones which are basically the same for all
85 Coff targets except that they use the external symbol format
86 or use different values for certain constants.
88 The generic routines are in @file{coffgen.c}. These routines
89 work for any Coff target. They use some hooks into the target
90 specific code; the hooks are in a @code{bfd_coff_backend_data}
91 structure, one of which exists for each target.
93 The essentially similar target-specific routines are in
94 @file{coffcode.h}. This header file includes executable C code.
95 The various Coff targets first include the appropriate Coff
96 header file, make any special defines that are needed, and
97 then include @file{coffcode.h}.
99 Some of the Coff targets then also have additional routines in
100 the target source file itself.
102 For example, @file{coff-i960.c} includes
103 @file{coff/internal.h} and @file{coff/i960.h}. It then
104 defines a few constants, such as @code{I960}, and includes
105 @file{coffcode.h}. Since the i960 has complex relocation
106 types, @file{coff-i960.c} also includes some code to
107 manipulate the i960 relocs. This code is not in
108 @file{coffcode.h} because it would not be used by any other
114 Each flavour of coff supported in BFD has its own header file
115 describing the external layout of the structures. There is also
116 an internal description of the coff layout, in
117 @file{coff/internal.h}. A major function of the
118 coff backend is swapping the bytes and twiddling the bits to
119 translate the external form of the structures into the normal
120 internal form. This is all performed in the
121 @code{bfd_swap}_@i{thing}_@i{direction} routines. Some
122 elements are different sizes between different versions of
123 coff; it is the duty of the coff version specific include file
124 to override the definitions of various packing routines in
125 @file{coffcode.h}. E.g., the size of line number entry in coff is
126 sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
127 @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
128 correct one. No doubt, some day someone will find a version of
129 coff which has a varying field size not catered to at the
130 moment. To port BFD, that person will have to add more @code{#defines}.
131 Three of the bit twiddling routines are exported to
132 @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
133 and @code{coff_swap_linno_in}. @code{GDB} reads the symbol
134 table on its own, but uses BFD to fix things up. More of the
135 bit twiddlers are exported for @code{gas};
136 @code{coff_swap_aux_out}, @code{coff_swap_sym_out},
137 @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
138 @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
139 @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
140 of all the symbol table and reloc drudgery itself, thereby
141 saving the internal BFD overhead, but uses BFD to swap things
142 on the way out, making cross ports much safer. Doing so also
143 allows BFD (and thus the linker) to use the same header files
144 as @code{gas}, which makes one avenue to disaster disappear.
149 The simple canonical form for symbols used by BFD is not rich
150 enough to keep all the information available in a coff symbol
151 table. The back end gets around this problem by keeping the original
152 symbol table around, "behind the scenes".
154 When a symbol table is requested (through a call to
155 @code{bfd_canonicalize_symtab}), a request gets through to
156 @code{coff_get_normalized_symtab}. This reads the symbol table from
157 the coff file and swaps all the structures inside into the
158 internal form. It also fixes up all the pointers in the table
159 (represented in the file by offsets from the first symbol in
160 the table) into physical pointers to elements in the new
161 internal table. This involves some work since the meanings of
162 fields change depending upon context: a field that is a
163 pointer to another structure in the symbol table at one moment
164 may be the size in bytes of a structure at the next. Another
165 pass is made over the table. All symbols which mark file names
166 (<<C_FILE>> symbols) are modified so that the internal
167 string points to the value in the auxent (the real filename)
168 rather than the normal text associated with the symbol
171 At this time the symbol names are moved around. Coff stores
172 all symbols less than nine characters long physically
173 within the symbol table; longer strings are kept at the end of
174 the file in the string table. This pass moves all strings
175 into memory and replaces them with pointers to the strings.
178 The symbol table is massaged once again, this time to create
179 the canonical table used by the BFD application. Each symbol
180 is inspected in turn, and a decision made (using the
181 @code{sclass} field) about the various flags to set in the
182 @code{asymbol}. @xref{Symbols}. The generated canonical table
183 shares strings with the hidden internal symbol table.
185 Any linenumbers are read from the coff file too, and attached
186 to the symbols which own the functions the linenumbers belong to.
191 Writing a symbol to a coff file which didn't come from a coff
192 file will lose any debugging information. The @code{asymbol}
193 structure remembers the BFD from which the symbol was taken, and on
194 output the back end makes sure that the same destination target as
195 source target is present.
197 When the symbols have come from a coff file then all the
198 debugging information is preserved.
200 Symbol tables are provided for writing to the back end in a
201 vector of pointers to pointers. This allows applications like
202 the linker to accumulate and output large symbol tables
203 without having to do too much byte copying.
205 This function runs through the provided symbol table and
206 patches each symbol marked as a file place holder
207 (@code{C_FILE}) to point to the next file place holder in the
208 list. It also marks each @code{offset} field in the list with
209 the offset from the first symbol of the current symbol.
211 Another function of this procedure is to turn the canonical
212 value form of BFD into the form used by coff. Internally, BFD
213 expects symbol values to be offsets from a section base; so a
214 symbol physically at 0x120, but in a section starting at
215 0x100, would have the value 0x20. Coff expects symbols to
216 contain their final value, so symbols have their values
217 changed at this point to reflect their sum with their owning
218 section. This transformation uses the
219 <<output_section>> field of the @code{asymbol}'s
220 @code{asection} @xref{Sections}.
222 o <<coff_mangle_symbols>>
224 This routine runs though the provided symbol table and uses
225 the offsets generated by the previous pass and the pointers
226 generated when the symbol table was read in to create the
227 structured hierachy required by coff. It changes each pointer
228 to a symbol into the index into the symbol table of the asymbol.
230 o <<coff_write_symbols>>
232 This routine runs through the symbol table and patches up the
233 symbols from their internal form into the coff way, calls the
234 bit twiddlers, and writes out the table to the file.
243 The hidden information for an <<asymbol>> is described in a
244 <<combined_entry_type>>:
248 .typedef struct coff_ptr_struct
251 . {* Remembers the offset from the first symbol in the file for
252 . this symbol. Generated by coff_renumber_symbols. *}
253 .unsigned int offset;
255 . {* Should the value of this symbol be renumbered. Used for
256 . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
257 .unsigned int fix_value : 1;
259 . {* Should the tag field of this symbol be renumbered.
260 . Created by coff_pointerize_aux. *}
261 .unsigned int fix_tag : 1;
263 . {* Should the endidx field of this symbol be renumbered.
264 . Created by coff_pointerize_aux. *}
265 .unsigned int fix_end : 1;
267 . {* Should the x_csect.x_scnlen field be renumbered.
268 . Created by coff_pointerize_aux. *}
269 .unsigned int fix_scnlen : 1;
271 . {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the
272 . index into the line number entries. Set by
273 . coff_slurp_symbol_table. *}
274 .unsigned int fix_line : 1;
276 . {* The container for the symbol structure as read and translated
280 . union internal_auxent auxent;
281 . struct internal_syment syment;
283 .} combined_entry_type;
286 .{* Each canonical asymbol really looks like this: *}
288 .typedef struct coff_symbol_struct
290 . {* The actual symbol which the rest of BFD works with *}
293 . {* A pointer to the hidden information for this symbol *}
294 .combined_entry_type *native;
296 . {* A pointer to the linenumber information for this symbol *}
297 .struct lineno_cache_entry *lineno;
299 . {* Have the line numbers been relocated yet ? *}
300 .boolean done_lineno;
309 #include "coffswap.h"
312 #define STRING_SIZE_SIZE (4)
314 /* void warning(); */
317 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
318 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
319 * NOTE: If you add to/change this routine, you should mirror the changes
320 * in styp_to_sec_flags().
323 sec_to_styp_flags (sec_name
, sec_flags
)
324 CONST
char *sec_name
;
329 if (!strcmp (sec_name
, _TEXT
))
331 styp_flags
= STYP_TEXT
;
333 else if (!strcmp (sec_name
, _DATA
))
335 styp_flags
= STYP_DATA
;
337 else if (!strcmp (sec_name
, _BSS
))
339 styp_flags
= STYP_BSS
;
342 else if (!strcmp (sec_name
, _COMMENT
))
344 styp_flags
= STYP_INFO
;
345 #endif /* _COMMENT */
348 else if (!strcmp (sec_name
, _LIB
))
350 styp_flags
= STYP_LIB
;
354 else if (!strcmp (sec_name
, _LIT
))
356 styp_flags
= STYP_LIT
;
359 else if (!strcmp (sec_name
, ".debug"))
362 styp_flags
= STYP_DEBUG
;
364 styp_flags
= STYP_INFO
;
367 else if (!strncmp (sec_name
, ".stab", 5))
369 styp_flags
= STYP_INFO
;
372 else if (!strcmp (sec_name
, ".edata"))
374 styp_flags
= STYP_DATA
;
378 else if (!strcmp (sec_name
, _PAD
))
380 styp_flags
= STYP_PAD
;
382 else if (!strcmp (sec_name
, _LOADER
))
384 styp_flags
= STYP_LOADER
;
387 /* Try and figure out what it should be */
388 else if (sec_flags
& SEC_CODE
)
390 styp_flags
= STYP_TEXT
;
392 else if (sec_flags
& SEC_DATA
)
394 styp_flags
= STYP_DATA
;
396 else if (sec_flags
& SEC_READONLY
)
398 #ifdef STYP_LIT /* 29k readonly text/data section */
399 styp_flags
= STYP_LIT
;
401 styp_flags
= STYP_TEXT
;
402 #endif /* STYP_LIT */
404 else if (sec_flags
& SEC_LOAD
)
406 styp_flags
= STYP_TEXT
;
408 else if (sec_flags
& SEC_ALLOC
)
410 styp_flags
= STYP_BSS
;
414 if ((sec_flags
& (SEC_NEVER_LOAD
| SEC_COFF_SHARED_LIBRARY
)) != 0)
415 styp_flags
|= STYP_NOLOAD
;
419 if (sec_flags
& SEC_LINK_ONCE
)
420 styp_flags
|= IMAGE_SCN_LNK_COMDAT
;
426 * Return a word with SEC_* flags set to represent the incoming
427 * STYP_* flags (from scnhdr.s_flags). The inverse of this
428 * function is sec_to_styp_flags().
429 * NOTE: If you add to/change this routine, you should mirror the changes
430 * in sec_to_styp_flags().
433 styp_to_sec_flags (abfd
, hdr
, name
)
438 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
439 long styp_flags
= internal_s
->s_flags
;
440 flagword sec_flags
= 0;
443 if (styp_flags
& STYP_NOLOAD
)
445 sec_flags
|= SEC_NEVER_LOAD
;
447 #endif /* STYP_NOLOAD */
449 /* For 386 COFF, at least, an unloadable text or data section is
450 actually a shared library section. */
451 if (styp_flags
& STYP_TEXT
)
453 if (sec_flags
& SEC_NEVER_LOAD
)
454 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
456 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
458 else if (styp_flags
& STYP_DATA
)
460 if (sec_flags
& SEC_NEVER_LOAD
)
461 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
463 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
465 else if (styp_flags
& STYP_BSS
)
467 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
468 if (sec_flags
& SEC_NEVER_LOAD
)
469 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
472 sec_flags
|= SEC_ALLOC
;
474 else if (styp_flags
& STYP_INFO
)
476 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
477 defined. coff_compute_section_file_positions uses
478 COFF_PAGE_SIZE to ensure that the low order bits of the
479 section VMA and the file offset match. If we don't know
480 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
481 and demand page loading of the file will fail. */
482 #ifdef COFF_PAGE_SIZE
483 sec_flags
|= SEC_DEBUGGING
;
486 else if (styp_flags
& STYP_PAD
)
490 else if (strcmp (name
, _TEXT
) == 0)
492 if (sec_flags
& SEC_NEVER_LOAD
)
493 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
495 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
497 else if (strcmp (name
, _DATA
) == 0)
499 if (sec_flags
& SEC_NEVER_LOAD
)
500 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
502 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
504 else if (strcmp (name
, _BSS
) == 0)
506 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
507 if (sec_flags
& SEC_NEVER_LOAD
)
508 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
511 sec_flags
|= SEC_ALLOC
;
513 else if (strcmp (name
, ".debug") == 0
515 || strcmp (name
, _COMMENT
) == 0
517 || strncmp (name
, ".stab", 5) == 0)
519 #ifdef COFF_PAGE_SIZE
520 sec_flags
|= SEC_DEBUGGING
;
524 else if (strcmp (name
, _LIB
) == 0)
528 else if (strcmp (name
, _LIT
) == 0)
530 sec_flags
= SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
;
535 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
538 #ifdef STYP_LIT /* A29k readonly text/data section type */
539 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
541 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
543 #endif /* STYP_LIT */
544 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
545 if (styp_flags
& STYP_OTHER_LOAD
)
547 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
549 #endif /* STYP_SDATA */
552 if (styp_flags
& IMAGE_SCN_LNK_REMOVE
)
553 sec_flags
|= SEC_EXCLUDE
;
555 if (styp_flags
& IMAGE_SCN_LNK_COMDAT
)
557 sec_flags
|= SEC_LINK_ONCE
;
559 /* Unfortunately, the PE format stores essential information in
560 the symbol table, of all places. We need to extract that
561 information now, so that objdump and the linker will know how
562 to handle the section without worrying about the symbols. We
563 can't call slurp_symtab, because the linker doesn't want the
566 if (_bfd_coff_get_external_symbols (abfd
))
568 bfd_byte
*esym
, *esymend
;
570 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
571 esymend
= esym
+ obj_raw_syment_count (abfd
) * SYMESZ
;
573 while (esym
< esymend
)
575 struct internal_syment isym
;
577 bfd_coff_swap_sym_in (abfd
, (PTR
) esym
, (PTR
) &isym
);
579 if (sizeof (internal_s
->s_name
) > SYMNMLEN
)
581 /* This case implies that the matching symbol name
582 will be in the string table. */
586 if (isym
.n_sclass
== C_STAT
587 && isym
.n_type
== T_NULL
588 && isym
.n_numaux
== 1)
590 char buf
[SYMNMLEN
+ 1];
593 symname
= _bfd_coff_internal_syment_name (abfd
, &isym
, buf
);
597 if (strcmp (name
, symname
) == 0)
599 union internal_auxent aux
;
601 /* This is the section symbol. */
603 bfd_coff_swap_aux_in (abfd
, (PTR
) (esym
+ SYMESZ
),
604 isym
.n_type
, isym
.n_sclass
,
605 0, isym
.n_numaux
, (PTR
) &aux
);
607 switch (aux
.x_scn
.x_comdat
)
609 case IMAGE_COMDAT_SELECT_NODUPLICATES
:
610 sec_flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
614 case IMAGE_COMDAT_SELECT_ANY
:
615 sec_flags
|= SEC_LINK_DUPLICATES_DISCARD
;
618 case IMAGE_COMDAT_SELECT_SAME_SIZE
:
619 sec_flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
622 case IMAGE_COMDAT_SELECT_EXACT_MATCH
:
623 sec_flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
626 case IMAGE_COMDAT_SELECT_ASSOCIATIVE
:
627 /* FIXME: This is not currently implemented. */
628 sec_flags
|= SEC_LINK_DUPLICATES_DISCARD
;
636 esym
+= (isym
.n_numaux
+ 1) * SYMESZ
;
645 #define get_index(symbol) ((symbol)->udata.i)
649 bfd_coff_backend_data
653 Special entry points for gdb to swap in coff symbol table parts:
656 . void (*_bfd_coff_swap_aux_in) PARAMS ((
665 . void (*_bfd_coff_swap_sym_in) PARAMS ((
670 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
676 Special entry points for gas to swap out coff parts:
678 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
687 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
692 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
697 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
702 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
707 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
712 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
718 Special entry points for generic COFF routines to call target
719 dependent COFF routines:
721 . unsigned int _bfd_filhsz;
722 . unsigned int _bfd_aoutsz;
723 . unsigned int _bfd_scnhsz;
724 . unsigned int _bfd_symesz;
725 . unsigned int _bfd_auxesz;
726 . unsigned int _bfd_relsz;
727 . unsigned int _bfd_linesz;
728 . boolean _bfd_coff_long_filenames;
729 . boolean _bfd_coff_long_section_names;
730 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
734 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
738 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
742 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
746 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
748 . PTR internal_filehdr));
749 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
751 . PTR internal_filehdr));
752 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
754 . PTR internal_filehdr,
755 . PTR internal_aouthdr));
756 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
758 . PTR internal_scnhdr,
759 . const char *name));
760 . void (*_bfd_set_alignment_hook) PARAMS ((
763 . PTR internal_scnhdr));
764 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
766 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
768 . struct internal_syment *sym));
769 . boolean (*_bfd_coff_pointerize_aux_hook) PARAMS ((
771 . combined_entry_type *table_base,
772 . combined_entry_type *symbol,
773 . unsigned int indaux,
774 . combined_entry_type *aux));
775 . boolean (*_bfd_coff_print_aux) PARAMS ((
778 . combined_entry_type *table_base,
779 . combined_entry_type *symbol,
780 . combined_entry_type *aux,
781 . unsigned int indaux));
782 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
784 . struct bfd_link_info *link_info,
785 . struct bfd_link_order *link_order,
788 . unsigned int *src_ptr,
789 . unsigned int *dst_ptr));
790 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
792 . asection *input_section,
794 . unsigned int shrink,
795 . struct bfd_link_info *link_info));
796 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
798 . struct internal_syment *));
799 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
801 . boolean (*_bfd_coff_start_final_link) PARAMS ((
803 . struct bfd_link_info *info));
804 . boolean (*_bfd_coff_relocate_section) PARAMS ((
806 . struct bfd_link_info *info,
808 . asection *input_section,
809 . bfd_byte *contents,
810 . struct internal_reloc *relocs,
811 . struct internal_syment *syms,
812 . asection **sections));
813 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
816 . struct internal_reloc *rel,
817 . struct coff_link_hash_entry *h,
818 . struct internal_syment *sym,
819 . bfd_vma *addendp));
820 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
822 . struct bfd_link_info *info,
825 . struct internal_reloc *reloc,
826 . boolean *adjustedp));
827 . boolean (*_bfd_coff_link_add_one_symbol) PARAMS ((
828 . struct bfd_link_info *info,
834 . const char *string,
837 . struct bfd_link_hash_entry **hashp));
839 .} bfd_coff_backend_data;
841 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
843 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
844 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
846 .#define bfd_coff_swap_sym_in(a,e,i) \
847 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
849 .#define bfd_coff_swap_lineno_in(a,e,i) \
850 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
852 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
853 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
855 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
856 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
858 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
859 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
861 .#define bfd_coff_swap_sym_out(abfd, i,o) \
862 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
864 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
865 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
867 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
868 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
870 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
871 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
873 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
874 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
875 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
876 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
877 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
878 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
879 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
880 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
881 .#define bfd_coff_long_section_names(abfd) \
882 . (coff_backend_info (abfd)->_bfd_coff_long_section_names)
883 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
884 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
886 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
887 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
889 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
890 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
892 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
893 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
895 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
896 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
898 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
899 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
900 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
901 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
903 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
904 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
906 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
907 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
909 .#define bfd_coff_slurp_symbol_table(abfd)\
910 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
912 .#define bfd_coff_symname_in_debug(abfd, sym)\
913 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
915 .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
916 . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
917 . (abfd, file, base, symbol, aux, indaux))
919 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
920 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
921 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
923 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
924 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
925 . (abfd, section, reloc, shrink, link_info))
927 .#define bfd_coff_sym_is_global(abfd, sym)\
928 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
931 .#define bfd_coff_compute_section_file_positions(abfd)\
932 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
935 .#define bfd_coff_start_final_link(obfd, info)\
936 . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
938 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
939 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
940 . (obfd, info, ibfd, o, con, rel, isyms, secs))
941 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
942 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
943 . (abfd, sec, rel, h, sym, addendp))
944 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
945 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
946 . (obfd, info, ibfd, sec, rel, adjustedp))
947 .#define bfd_coff_link_add_one_symbol(info,abfd,name,flags,section,value,string,cp,coll,hashp)\
948 . ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\
949 . (info, abfd, name, flags, section, value, string, cp, coll, hashp))
953 /* See whether the magic number matches. */
956 coff_bad_format_hook (abfd
, filehdr
)
960 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
962 if (BADMAG (*internal_f
))
965 /* if the optional header is NULL or not the correct size then
966 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
967 and Intel 960 readwrite headers (I960WRMAGIC) is that the
968 optional header is of a different size.
970 But the mips keeps extra stuff in it's opthdr, so dont check
974 #if defined(M88) || defined(I960)
975 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
983 initialize a section structure with information peculiar to this
984 particular implementation of coff
988 coff_new_section_hook (abfd
, section
)
992 section
->alignment_power
= COFF_DEFAULT_SECTION_ALIGNMENT_POWER
;
995 if (xcoff_data (abfd
)->text_align_power
!= 0
996 && strcmp (bfd_get_section_name (abfd
, section
), ".text") == 0)
997 section
->alignment_power
= xcoff_data (abfd
)->text_align_power
;
998 if (xcoff_data (abfd
)->data_align_power
!= 0
999 && strcmp (bfd_get_section_name (abfd
, section
), ".data") == 0)
1000 section
->alignment_power
= xcoff_data (abfd
)->data_align_power
;
1003 /* Allocate aux records for section symbols, to store size and
1006 @@ The 10 is a guess at a plausible maximum number of aux entries
1007 (but shouldn't be a constant). */
1008 coffsymbol (section
->symbol
)->native
=
1009 (combined_entry_type
*) bfd_zalloc (abfd
,
1010 sizeof (combined_entry_type
) * 10);
1012 /* The .stab section must be aligned to 2**2 at most, because
1013 otherwise there may be gaps in the section which gdb will not
1014 know how to interpret. Examining the section name is a hack, but
1015 that is also how gdb locates the section.
1016 We need to handle the .ctors and .dtors sections similarly, to
1017 avoid introducing null words in the tables. */
1018 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 2
1019 && (strncmp (section
->name
, ".stab", 5) == 0
1020 || strcmp (section
->name
, ".ctors") == 0
1021 || strcmp (section
->name
, ".dtors") == 0))
1022 section
->alignment_power
= 2;
1024 /* Similarly, the .stabstr section must be aligned to 2**0 at most. */
1025 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 0
1026 && strncmp (section
->name
, ".stabstr", 8) == 0)
1027 section
->alignment_power
= 0;
1034 /* Set the alignment of a BFD section. */
1037 coff_set_alignment_hook (abfd
, section
, scnhdr
)
1042 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
1045 for (i
= 0; i
< 32; i
++)
1046 if ((1 << i
) >= hdr
->s_align
)
1048 section
->alignment_power
= i
;
1054 /* a couple of macros to help setting the alignment power field */
1055 #define ALIGN_SET(field,x,y) \
1056 if (((field) & IMAGE_SCN_ALIGN_64BYTES) == x )\
1058 section->alignment_power = y;\
1061 #define ELIFALIGN_SET(field,x,y) \
1062 else if (( (field) & IMAGE_SCN_ALIGN_64BYTES) == x ) \
1064 section->alignment_power = y;\
1068 coff_set_alignment_hook (abfd
, section
, scnhdr
)
1073 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
1075 ALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_64BYTES
, 6)
1076 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_32BYTES
, 5)
1077 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_16BYTES
, 4)
1078 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_8BYTES
, 3)
1079 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_4BYTES
, 2)
1080 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_2BYTES
, 1)
1081 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_1BYTES
, 0)
1083 #ifdef POWERPC_LE_PE
1084 if (strcmp (section
->name
, ".idata$2") == 0)
1086 section
->alignment_power
= 0;
1088 else if (strcmp (section
->name
, ".idata$3") == 0)
1090 section
->alignment_power
= 0;
1092 else if (strcmp (section
->name
, ".idata$4") == 0)
1094 section
->alignment_power
= 2;
1096 else if (strcmp (section
->name
, ".idata$5") == 0)
1098 section
->alignment_power
= 2;
1100 else if (strcmp (section
->name
, ".idata$6") == 0)
1102 section
->alignment_power
= 1;
1104 else if (strcmp (section
->name
, ".reloc") == 0)
1106 section
->alignment_power
= 1;
1108 else if (strncmp (section
->name
, ".stab", 5) == 0)
1110 section
->alignment_power
= 2;
1114 #ifdef COFF_IMAGE_WITH_PE
1115 /* In a PE image file, the s_paddr field holds the virtual size of a
1116 section, while the s_size field holds the raw size. */
1117 if (hdr
->s_paddr
!= 0)
1119 if (coff_section_data (abfd
, section
) == NULL
)
1121 section
->used_by_bfd
=
1122 (PTR
) bfd_zalloc (abfd
, sizeof (struct coff_section_tdata
));
1123 if (section
->used_by_bfd
== NULL
)
1125 /* FIXME: Return error. */
1129 if (pei_section_data (abfd
, section
) == NULL
)
1131 coff_section_data (abfd
, section
)->tdata
=
1132 (PTR
) bfd_zalloc (abfd
, sizeof (struct pei_section_tdata
));
1133 if (coff_section_data (abfd
, section
)->tdata
== NULL
)
1135 /* FIXME: Return error. */
1139 pei_section_data (abfd
, section
)->virt_size
= hdr
->s_paddr
;
1145 #undef ELIFALIGN_SET
1147 #else /* ! COFF_WITH_PE */
1150 /* We grossly abuse this function to handle XCOFF overflow headers.
1151 When we see one, we correct the reloc and line number counts in the
1152 real header, and remove the section we just created. */
1155 coff_set_alignment_hook (abfd
, section
, scnhdr
)
1160 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
1164 if ((hdr
->s_flags
& STYP_OVRFLO
) == 0)
1167 real_sec
= coff_section_from_bfd_index (abfd
, hdr
->s_nreloc
);
1168 if (real_sec
== NULL
)
1171 real_sec
->reloc_count
= hdr
->s_paddr
;
1172 real_sec
->lineno_count
= hdr
->s_vaddr
;
1174 for (ps
= &abfd
->sections
; *ps
!= NULL
; ps
= &(*ps
)->next
)
1179 --abfd
->section_count
;
1185 #else /* ! RS6000COFF_C */
1187 #define coff_set_alignment_hook \
1188 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
1190 #endif /* ! RS6000COFF_C */
1191 #endif /* ! COFF_WITH_PE */
1194 #ifndef coff_mkobject
1196 coff_mkobject (abfd
)
1199 coff_data_type
*coff
;
1201 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*) bfd_zalloc (abfd
, sizeof (coff_data_type
));
1202 if (abfd
->tdata
.coff_obj_data
== 0)
1204 coff
= coff_data (abfd
);
1205 coff
->symbols
= (coff_symbol_type
*) NULL
;
1206 coff
->conversion_table
= (unsigned int *) NULL
;
1207 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
1208 coff
->relocbase
= 0;
1209 coff
->local_toc_sym_map
= 0;
1211 /* make_abs_section(abfd);*/
1217 /* Create the COFF backend specific information. */
1218 #ifndef coff_mkobject_hook
1220 coff_mkobject_hook (abfd
, filehdr
, aouthdr
)
1225 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1226 coff_data_type
*coff
;
1228 if (coff_mkobject (abfd
) == false)
1231 coff
= coff_data (abfd
);
1233 coff
->sym_filepos
= internal_f
->f_symptr
;
1235 /* These members communicate important constants about the symbol
1236 table to GDB's symbol-reading code. These `constants'
1237 unfortunately vary among coff implementations... */
1238 coff
->local_n_btmask
= N_BTMASK
;
1239 coff
->local_n_btshft
= N_BTSHFT
;
1240 coff
->local_n_tmask
= N_TMASK
;
1241 coff
->local_n_tshift
= N_TSHIFT
;
1242 coff
->local_symesz
= SYMESZ
;
1243 coff
->local_auxesz
= AUXESZ
;
1244 coff
->local_linesz
= LINESZ
;
1246 obj_raw_syment_count (abfd
) =
1247 obj_conv_table_size (abfd
) =
1248 internal_f
->f_nsyms
;
1251 if ((internal_f
->f_flags
& F_SHROBJ
) != 0)
1252 abfd
->flags
|= DYNAMIC
;
1253 if (aouthdr
!= NULL
&& internal_f
->f_opthdr
>= AOUTSZ
)
1255 struct internal_aouthdr
*internal_a
=
1256 (struct internal_aouthdr
*) aouthdr
;
1257 struct xcoff_tdata
*xcoff
;
1259 xcoff
= xcoff_data (abfd
);
1260 xcoff
->full_aouthdr
= true;
1261 xcoff
->toc
= internal_a
->o_toc
;
1262 xcoff
->sntoc
= internal_a
->o_sntoc
;
1263 xcoff
->snentry
= internal_a
->o_snentry
;
1264 xcoff
->text_align_power
= internal_a
->o_algntext
;
1265 xcoff
->data_align_power
= internal_a
->o_algndata
;
1266 xcoff
->modtype
= internal_a
->o_modtype
;
1267 xcoff
->cputype
= internal_a
->o_cputype
;
1268 xcoff
->maxdata
= internal_a
->o_maxdata
;
1269 xcoff
->maxstack
= internal_a
->o_maxstack
;
1277 /* Determine the machine architecture and type. FIXME: This is target
1278 dependent because the magic numbers are defined in the target
1279 dependent header files. But there is no particular need for this.
1280 If the magic numbers were moved to a separate file, this function
1281 would be target independent and would also be much more successful
1282 at linking together COFF files for different architectures. */
1285 coff_set_arch_mach_hook (abfd
, filehdr
)
1290 enum bfd_architecture arch
;
1291 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1294 switch (internal_f
->f_magic
)
1298 arch
= bfd_arch_powerpc
;
1299 machine
= 0; /* what does this mean? (krk) */
1305 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
1306 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
1307 arch
= bfd_arch_i386
;
1311 #ifdef A29K_MAGIC_BIG
1312 case A29K_MAGIC_BIG
:
1313 case A29K_MAGIC_LITTLE
:
1314 arch
= bfd_arch_a29k
;
1320 arch
= bfd_arch_arm
;
1327 #ifdef MC68KBCSMAGIC
1330 #ifdef APOLLOM68KMAGIC
1331 case APOLLOM68KMAGIC
:
1333 #ifdef LYNXCOFFMAGIC
1336 arch
= bfd_arch_m68k
;
1344 arch
= bfd_arch_m88k
;
1350 arch
= bfd_arch_z8k
;
1351 switch (internal_f
->f_flags
& F_MACHMASK
)
1354 machine
= bfd_mach_z8001
;
1357 machine
= bfd_mach_z8002
;
1366 arch
= bfd_arch_i860
;
1373 arch
= bfd_arch_i960
;
1374 switch (F_I960TYPE
& internal_f
->f_flags
)
1378 machine
= bfd_mach_i960_core
;
1381 machine
= bfd_mach_i960_kb_sb
;
1384 machine
= bfd_mach_i960_mc
;
1387 machine
= bfd_mach_i960_xa
;
1390 machine
= bfd_mach_i960_ca
;
1393 machine
= bfd_mach_i960_ka_sa
;
1396 machine
= bfd_mach_i960_jx
;
1399 machine
= bfd_mach_i960_hx
;
1413 if (xcoff_data (abfd
)->cputype
!= -1)
1414 cputype
= xcoff_data (abfd
)->cputype
& 0xff;
1417 /* We did not get a value from the a.out header. If the
1418 file has not been stripped, we may be able to get the
1419 architecture information from the first symbol, if it
1420 is a .file symbol. */
1421 if (obj_raw_syment_count (abfd
) == 0)
1425 bfd_byte buf
[SYMESZ
];
1426 struct internal_syment sym
;
1428 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1429 || bfd_read (buf
, 1, SYMESZ
, abfd
) != SYMESZ
)
1431 coff_swap_sym_in (abfd
, (PTR
) buf
, (PTR
) &sym
);
1432 if (sym
.n_sclass
== C_FILE
)
1433 cputype
= sym
.n_type
& 0xff;
1439 /* FIXME: We don't handle all cases here. */
1445 /* PowerPC Macs use the same magic numbers as RS/6000
1446 (because that's how they were bootstrapped originally),
1447 but they are always PowerPC architecture. */
1448 arch
= bfd_arch_powerpc
;
1451 arch
= bfd_arch_rs6000
;
1453 #endif /* POWERMAC */
1457 arch
= bfd_arch_powerpc
;
1460 case 2: /* 64 bit PowerPC */
1461 arch
= bfd_arch_powerpc
;
1465 arch
= bfd_arch_powerpc
;
1469 arch
= bfd_arch_rs6000
;
1479 arch
= bfd_arch_we32k
;
1486 arch
= bfd_arch_h8300
;
1487 machine
= bfd_mach_h8300
;
1488 /* !! FIXME this probably isn't the right place for this */
1489 abfd
->flags
|= BFD_IS_RELAXABLE
;
1495 arch
= bfd_arch_h8300
;
1496 machine
= bfd_mach_h8300h
;
1497 /* !! FIXME this probably isn't the right place for this */
1498 abfd
->flags
|= BFD_IS_RELAXABLE
;
1504 arch
= bfd_arch_h8300
;
1505 machine
= bfd_mach_h8300s
;
1506 /* !! FIXME this probably isn't the right place for this */
1507 abfd
->flags
|= BFD_IS_RELAXABLE
;
1511 #ifdef SH_ARCH_MAGIC_BIG
1512 case SH_ARCH_MAGIC_BIG
:
1513 case SH_ARCH_MAGIC_LITTLE
:
1521 arch
= bfd_arch_h8500
;
1528 #ifdef LYNXCOFFMAGIC
1531 arch
= bfd_arch_sparc
;
1536 default: /* Unreadable input file type */
1537 arch
= bfd_arch_obscure
;
1541 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1545 #ifdef SYMNAME_IN_DEBUG
1548 symname_in_debug_hook (abfd
, sym
)
1550 struct internal_syment
*sym
;
1552 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1557 #define symname_in_debug_hook \
1558 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1564 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1566 static boolean coff_pointerize_aux_hook
1567 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1568 unsigned int, combined_entry_type
*));
1572 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1574 combined_entry_type
*table_base
;
1575 combined_entry_type
*symbol
;
1576 unsigned int indaux
;
1577 combined_entry_type
*aux
;
1579 int class = symbol
->u
.syment
.n_sclass
;
1581 if ((class == C_EXT
|| class == C_HIDEXT
)
1582 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1584 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
1586 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
1587 table_base
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
1588 aux
->fix_scnlen
= 1;
1591 /* Return true to indicate that the caller should not do any
1592 further work on this auxent. */
1596 /* Return false to indicate that this auxent should be handled by
1604 /* We don't want to pointerize bal entries. */
1606 static boolean coff_pointerize_aux_hook
1607 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1608 unsigned int, combined_entry_type
*));
1612 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1614 combined_entry_type
*table_base
;
1615 combined_entry_type
*symbol
;
1616 unsigned int indaux
;
1617 combined_entry_type
*aux
;
1619 /* Return true if we don't want to pointerize this aux entry, which
1620 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1622 && (symbol
->u
.syment
.n_sclass
== C_LEAFPROC
1623 || symbol
->u
.syment
.n_sclass
== C_LEAFSTAT
1624 || symbol
->u
.syment
.n_sclass
== C_LEAFEXT
));
1629 #define coff_pointerize_aux_hook 0
1632 #endif /* ! RS6000COFF_C */
1634 /* Print an aux entry. This returns true if it has printed it. */
1636 static boolean coff_print_aux
1637 PARAMS ((bfd
*, FILE *, combined_entry_type
*, combined_entry_type
*,
1638 combined_entry_type
*, unsigned int));
1641 coff_print_aux (abfd
, file
, table_base
, symbol
, aux
, indaux
)
1644 combined_entry_type
*table_base
;
1645 combined_entry_type
*symbol
;
1646 combined_entry_type
*aux
;
1647 unsigned int indaux
;
1650 if ((symbol
->u
.syment
.n_sclass
== C_EXT
1651 || symbol
->u
.syment
.n_sclass
== C_HIDEXT
)
1652 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1654 /* This is a csect entry. */
1655 fprintf (file
, "AUX ");
1656 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) != XTY_LD
)
1658 BFD_ASSERT (! aux
->fix_scnlen
);
1659 fprintf (file
, "val %5ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1663 fprintf (file
, "indx ");
1664 if (! aux
->fix_scnlen
)
1665 fprintf (file
, "%4ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1667 fprintf (file
, "%4ld",
1668 (long) (aux
->u
.auxent
.x_csect
.x_scnlen
.p
- table_base
));
1671 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1672 aux
->u
.auxent
.x_csect
.x_parmhash
,
1673 (unsigned int) aux
->u
.auxent
.x_csect
.x_snhash
,
1674 SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
),
1675 SMTYP_ALIGN (aux
->u
.auxent
.x_csect
.x_smtyp
),
1676 (unsigned int) aux
->u
.auxent
.x_csect
.x_smclas
,
1677 aux
->u
.auxent
.x_csect
.x_stab
,
1678 (unsigned int) aux
->u
.auxent
.x_csect
.x_snstab
);
1683 /* Return false to indicate that no special action was taken. */
1691 To write relocations, the back end steps though the
1692 canonical relocation table and create an
1693 @code{internal_reloc}. The symbol index to use is removed from
1694 the @code{offset} field in the symbol table supplied. The
1695 address comes directly from the sum of the section base
1696 address and the relocation offset; the type is dug directly
1697 from the howto field. Then the @code{internal_reloc} is
1698 swapped into the shape of an @code{external_reloc} and written
1705 static int compare_arelent_ptr
PARAMS ((const PTR
, const PTR
));
1707 /* AUX's ld wants relocations to be sorted */
1709 compare_arelent_ptr (x
, y
)
1713 const arelent
**a
= (const arelent
**) x
;
1714 const arelent
**b
= (const arelent
**) y
;
1715 bfd_size_type aadr
= (*a
)->address
;
1716 bfd_size_type badr
= (*b
)->address
;
1718 return (aadr
< badr
? -1 : badr
< aadr
? 1 : 0);
1721 #endif /* TARG_AUX */
1724 coff_write_relocs (abfd
, first_undef
)
1730 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1733 struct external_reloc dst
;
1739 /* sort relocations before we write them out */
1740 p
= (arelent
**) bfd_malloc (s
->reloc_count
* sizeof (arelent
*));
1741 if (p
== NULL
&& s
->reloc_count
> 0)
1743 memcpy (p
, s
->orelocation
, s
->reloc_count
* sizeof (arelent
*));
1744 qsort (p
, s
->reloc_count
, sizeof (arelent
*), compare_arelent_ptr
);
1747 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1749 for (i
= 0; i
< s
->reloc_count
; i
++)
1751 struct internal_reloc n
;
1753 memset ((PTR
) & n
, 0, sizeof (n
));
1755 /* Now we've renumbered the symbols we know where the
1756 undefined symbols live in the table. Check the reloc
1757 entries for symbols who's output bfd isn't the right one.
1758 This is because the symbol was undefined (which means
1759 that all the pointers are never made to point to the same
1760 place). This is a bad thing,'cause the symbols attached
1761 to the output bfd are indexed, so that the relocation
1762 entries know which symbol index they point to. So we
1763 have to look up the output symbol here. */
1765 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1768 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1769 asymbol
**outsyms
= abfd
->outsymbols
;
1770 for (i
= first_undef
; outsyms
[i
]; i
++)
1772 const char *intable
= outsyms
[i
]->name
;
1773 if (strcmp (intable
, sname
) == 0) {
1774 /* got a hit, so repoint the reloc */
1775 q
->sym_ptr_ptr
= outsyms
+ i
;
1781 n
.r_vaddr
= q
->address
+ s
->vma
;
1784 /* The 29k const/consth reloc pair is a real kludge. The consth
1785 part doesn't have a symbol; it has an offset. So rebuilt
1787 if (q
->howto
->type
== R_IHCONST
)
1788 n
.r_symndx
= q
->addend
;
1793 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1794 /* This is a relocation relative to the absolute symbol. */
1798 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1799 /* Take notice if the symbol reloc points to a symbol
1800 we don't have in our symbol table. What should we
1802 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1807 #ifdef SWAP_OUT_RELOC_OFFSET
1808 n
.r_offset
= q
->addend
;
1812 /* Work out reloc type from what is required */
1813 SELECT_RELOC (n
, q
->howto
);
1815 n
.r_type
= q
->howto
->type
;
1817 coff_swap_reloc_out (abfd
, &n
, &dst
);
1818 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1831 /* Set flags and magic number of a coff file from architecture and machine
1832 type. Result is true if we can represent the arch&type, false if not. */
1835 coff_set_flags (abfd
, magicp
, flagsp
)
1838 unsigned short *flagsp
;
1840 switch (bfd_get_arch (abfd
))
1845 switch (bfd_get_mach (abfd
))
1847 case bfd_mach_z8001
:
1850 case bfd_mach_z8002
:
1864 *magicp
= I960ROMAGIC
;
1866 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1867 I960RWMAGIC); FIXME???
1869 switch (bfd_get_mach (abfd
))
1871 case bfd_mach_i960_core
:
1874 case bfd_mach_i960_kb_sb
:
1877 case bfd_mach_i960_mc
:
1880 case bfd_mach_i960_xa
:
1883 case bfd_mach_i960_ca
:
1886 case bfd_mach_i960_ka_sa
:
1889 case bfd_mach_i960_jx
:
1892 case bfd_mach_i960_hx
:
1909 case bfd_arch_powerpc
:
1916 *magicp
= I386MAGIC
;
1918 /* Just overwrite the usual value if we're doing Lynx. */
1919 *magicp
= LYNXCOFFMAGIC
;
1926 *magicp
= I860MAGIC
;
1932 #ifdef APOLLOM68KMAGIC
1933 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1935 /* NAMES_HAVE_UNDERSCORE may be defined by coff-u68k.c. */
1936 #ifdef NAMES_HAVE_UNDERSCORE
1937 *magicp
= MC68KBCSMAGIC
;
1939 *magicp
= MC68MAGIC
;
1943 /* Just overwrite the usual value if we're doing Lynx. */
1944 *magicp
= LYNXCOFFMAGIC
;
1952 *magicp
= MC88OMAGIC
;
1957 case bfd_arch_h8300
:
1958 switch (bfd_get_mach (abfd
))
1960 case bfd_mach_h8300
:
1961 *magicp
= H8300MAGIC
;
1963 case bfd_mach_h8300h
:
1964 *magicp
= H8300HMAGIC
;
1966 case bfd_mach_h8300s
:
1967 *magicp
= H8300SMAGIC
;
1973 #ifdef SH_ARCH_MAGIC_BIG
1975 if (bfd_big_endian (abfd
))
1976 *magicp
= SH_ARCH_MAGIC_BIG
;
1978 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1984 case bfd_arch_sparc
:
1985 *magicp
= SPARCMAGIC
;
1987 /* Just overwrite the usual value if we're doing Lynx. */
1988 *magicp
= LYNXCOFFMAGIC
;
1995 case bfd_arch_h8500
:
1996 *magicp
= H8500MAGIC
;
2000 #ifdef A29K_MAGIC_BIG
2002 if (bfd_big_endian (abfd
))
2003 *magicp
= A29K_MAGIC_BIG
;
2005 *magicp
= A29K_MAGIC_LITTLE
;
2011 case bfd_arch_we32k
:
2012 *magicp
= WE32KMAGIC
;
2018 case bfd_arch_rs6000
:
2020 case bfd_arch_powerpc
:
2022 *magicp
= U802TOCMAGIC
;
2027 default: /* Unknown architecture */
2028 /* return false; -- fall through to "return false" below, to avoid
2029 "statement never reached" errors on the one below. */
2038 coff_set_arch_mach (abfd
, arch
, machine
)
2040 enum bfd_architecture arch
;
2041 unsigned long machine
;
2044 unsigned short dummy2
;
2046 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
2049 if (arch
!= bfd_arch_unknown
&&
2050 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
2051 return false; /* We can't represent this type */
2053 return true; /* We're easy ... */
2057 /* Calculate the file position for each section. */
2060 coff_compute_section_file_positions (abfd
)
2064 asection
*previous
= (asection
*) NULL
;
2065 file_ptr sofar
= FILHSZ
;
2073 /* On XCOFF, if we have symbols, set up the .debug section. */
2074 if (bfd_get_symcount (abfd
) > 0)
2077 bfd_size_type i
, symcount
;
2081 symcount
= bfd_get_symcount (abfd
);
2082 for (symp
= abfd
->outsymbols
, i
= 0; i
< symcount
; symp
++, i
++)
2084 coff_symbol_type
*cf
;
2086 cf
= coff_symbol_from (abfd
, *symp
);
2088 && cf
->native
!= NULL
2089 && SYMNAME_IN_DEBUG (&cf
->native
->u
.syment
))
2093 len
= strlen (bfd_asymbol_name (*symp
));
2102 dsec
= bfd_make_section_old_way (abfd
, ".debug");
2105 dsec
->_raw_size
= sz
;
2106 dsec
->flags
|= SEC_HAS_CONTENTS
;
2111 #ifdef COFF_IMAGE_WITH_PE
2113 if (coff_data (abfd
)->link_info
)
2115 page_size
= pe_data (abfd
)->pe_opthdr
.FileAlignment
;
2118 page_size
= PE_DEF_FILE_ALIGNMENT
;
2120 #ifdef COFF_PAGE_SIZE
2121 int page_size
= COFF_PAGE_SIZE
;
2125 if (bfd_get_start_address (abfd
))
2127 /* A start address may have been added to the original file. In this
2128 case it will need an optional header to record it. */
2129 abfd
->flags
|= EXEC_P
;
2132 if (abfd
->flags
& EXEC_P
)
2135 else if (xcoff_data (abfd
)->full_aouthdr
)
2138 sofar
+= SMALL_AOUTSZ
;
2141 sofar
+= abfd
->section_count
* SCNHSZ
;
2144 /* XCOFF handles overflows in the reloc and line number count fields
2145 by allocating a new section header to hold the correct counts. */
2146 for (current
= abfd
->sections
; current
!= NULL
; current
= current
->next
)
2147 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2151 for (current
= abfd
->sections
, count
= 1;
2152 current
!= (asection
*) NULL
;
2153 current
= current
->next
, ++count
)
2155 current
->target_index
= count
;
2157 /* Only deal with sections which have contents */
2158 if (!(current
->flags
& SEC_HAS_CONTENTS
))
2161 /* Align the sections in the file to the same boundary on
2162 which they are aligned in virtual memory. I960 doesn't
2163 do this (FIXME) so we can stay in sync with Intel. 960
2164 doesn't yet page from files... */
2166 if ((abfd
->flags
& EXEC_P
) != 0)
2168 /* make sure this section is aligned on the right boundary - by
2169 padding the previous section up if necessary */
2172 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
2173 if (previous
!= (asection
*) NULL
)
2175 previous
->_raw_size
+= sofar
- old_sofar
;
2181 /* In demand paged files the low order bits of the file offset
2182 must match the low order bits of the virtual address. */
2183 #ifdef COFF_PAGE_SIZE
2184 if ((abfd
->flags
& D_PAGED
) != 0
2185 && (current
->flags
& SEC_ALLOC
) != 0)
2186 sofar
+= (current
->vma
- sofar
) % page_size
;
2188 current
->filepos
= sofar
;
2190 #ifdef COFF_IMAGE_WITH_PE
2191 /* With PE we have to pad each section to be a multiple of its
2192 page size too, and remember both sizes. */
2194 if (coff_section_data (abfd
, current
) == NULL
)
2196 current
->used_by_bfd
=
2197 (PTR
) bfd_zalloc (abfd
, sizeof (struct coff_section_tdata
));
2198 if (current
->used_by_bfd
== NULL
)
2200 /* FIXME: Return error. */
2204 if (pei_section_data (abfd
, current
) == NULL
)
2206 coff_section_data (abfd
, current
)->tdata
=
2207 (PTR
) bfd_zalloc (abfd
, sizeof (struct pei_section_tdata
));
2208 if (coff_section_data (abfd
, current
)->tdata
== NULL
)
2210 /* FIXME: Return error. */
2214 if (pei_section_data (abfd
, current
)->virt_size
== 0)
2215 pei_section_data (abfd
, current
)->virt_size
= current
->_raw_size
;
2217 current
->_raw_size
= (current
->_raw_size
+ page_size
-1) & -page_size
;
2220 sofar
+= current
->_raw_size
;
2223 /* make sure that this section is of the right size too */
2224 if ((abfd
->flags
& EXEC_P
) == 0)
2226 bfd_size_type old_size
;
2228 old_size
= current
->_raw_size
;
2229 current
->_raw_size
= BFD_ALIGN (current
->_raw_size
,
2230 1 << current
->alignment_power
);
2231 sofar
+= current
->_raw_size
- old_size
;
2236 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
2237 current
->_raw_size
+= sofar
- old_sofar
;
2242 /* Force .lib sections to start at zero. The vma is then
2243 incremented in coff_set_section_contents. This is right for
2245 if (strcmp (current
->name
, _LIB
) == 0)
2246 bfd_set_section_vma (abfd
, current
, 0);
2252 obj_relocbase (abfd
) = sofar
;
2253 abfd
->output_has_begun
= true;
2259 /* This can never work, because it is called too late--after the
2260 section positions have been set. I can't figure out what it is
2261 for, so I am going to disable it--Ian Taylor 20 March 1996. */
2263 /* If .file, .text, .data, .bss symbols are missing, add them. */
2264 /* @@ Should we only be adding missing symbols, or overriding the aux
2265 values for existing section symbols? */
2267 coff_add_missing_symbols (abfd
)
2270 unsigned int nsyms
= bfd_get_symcount (abfd
);
2271 asymbol
**sympp
= abfd
->outsymbols
;
2274 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
2276 for (i
= 0; i
< nsyms
; i
++)
2278 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
2282 /* only do this if there is a coff representation of the input
2284 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
2289 name
= csym
->symbol
.name
;
2292 if (!strcmp (name
, _TEXT
))
2295 else if (!strcmp (name
, ".wtext"))
2298 else if (!strcmp (name
, _DATA
))
2300 else if (!strcmp (name
, _BSS
))
2304 /* Now i == bfd_get_symcount (abfd). */
2305 /* @@ For now, don't deal with .file symbol. */
2308 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
2310 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
2311 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
2314 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
2317 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
2321 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
2323 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
2325 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
2326 BFD_ASSERT (i
== nsyms
);
2327 bfd_set_symtab (abfd
, sympp2
, nsyms
);
2336 coff_write_object_contents (abfd
)
2340 boolean hasrelocs
= false;
2341 boolean haslinno
= false;
2343 file_ptr reloc_base
;
2344 file_ptr lineno_base
;
2346 unsigned long reloc_size
= 0;
2347 unsigned long lnno_size
= 0;
2348 boolean long_section_names
;
2349 asection
*text_sec
= NULL
;
2350 asection
*data_sec
= NULL
;
2351 asection
*bss_sec
= NULL
;
2352 struct internal_filehdr internal_f
;
2353 struct internal_aouthdr internal_a
;
2354 #ifdef COFF_LONG_SECTION_NAMES
2355 size_t string_size
= STRING_SIZE_SIZE
;
2358 bfd_set_error (bfd_error_system_call
);
2360 /* Make a pass through the symbol table to count line number entries and
2361 put them into the correct asections */
2363 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
2365 if (abfd
->output_has_begun
== false)
2366 coff_compute_section_file_positions (abfd
);
2368 reloc_base
= obj_relocbase (abfd
);
2370 /* Work out the size of the reloc and linno areas */
2372 for (current
= abfd
->sections
; current
!= NULL
; current
=
2374 reloc_size
+= current
->reloc_count
* RELSZ
;
2376 lineno_base
= reloc_base
+ reloc_size
;
2377 sym_base
= lineno_base
+ lnno_size
;
2379 /* Indicate in each section->line_filepos its actual file address */
2380 for (current
= abfd
->sections
; current
!= NULL
; current
=
2383 if (current
->lineno_count
)
2385 current
->line_filepos
= lineno_base
;
2386 current
->moving_line_filepos
= lineno_base
;
2387 lineno_base
+= current
->lineno_count
* LINESZ
;
2391 current
->line_filepos
= 0;
2393 if (current
->reloc_count
)
2395 current
->rel_filepos
= reloc_base
;
2396 reloc_base
+= current
->reloc_count
* RELSZ
;
2400 current
->rel_filepos
= 0;
2404 /* Write section headers to the file. */
2405 internal_f
.f_nscns
= 0;
2407 if ((abfd
->flags
& EXEC_P
) != 0)
2408 scn_base
= FILHSZ
+ AOUTSZ
;
2413 if (xcoff_data (abfd
)->full_aouthdr
)
2416 scn_base
+= SMALL_AOUTSZ
;
2420 if (bfd_seek (abfd
, scn_base
, SEEK_SET
) != 0)
2423 long_section_names
= false;
2424 for (current
= abfd
->sections
;
2426 current
= current
->next
)
2428 struct internal_scnhdr section
;
2431 /* If we've got a .reloc section, remember. */
2433 #ifdef COFF_IMAGE_WITH_PE
2434 if (strcmp (current
->name
, ".reloc") == 0)
2436 pe_data (abfd
)->has_reloc_section
= 1;
2441 internal_f
.f_nscns
++;
2443 strncpy (section
.s_name
, current
->name
, SCNNMLEN
);
2445 #ifdef COFF_LONG_SECTION_NAMES
2446 /* Handle long section names as in PE. This must be compatible
2447 with the code in coff_write_symbols. */
2451 len
= strlen (current
->name
);
2454 memset (section
.s_name
, 0, SCNNMLEN
);
2455 sprintf (section
.s_name
, "/%lu", (unsigned long) string_size
);
2456 string_size
+= len
+ 1;
2457 long_section_names
= true;
2463 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2464 Ian Taylor <ian@cygnus.com>. */
2465 if (strcmp (current
->name
, _LIB
) == 0)
2466 section
.s_vaddr
= 0;
2469 section
.s_vaddr
= current
->vma
;
2470 section
.s_paddr
= current
->lma
;
2471 section
.s_size
= current
->_raw_size
;
2474 section
.s_paddr
= 0;
2476 #ifdef COFF_IMAGE_WITH_PE
2477 /* Reminder: s_paddr holds the virtual size of the section. */
2478 if (coff_section_data (abfd
, current
) != NULL
2479 && pei_section_data (abfd
, current
) != NULL
)
2480 section
.s_paddr
= pei_section_data (abfd
, current
)->virt_size
;
2482 section
.s_paddr
= 0;
2486 If this section has no size or is unloadable then the scnptr
2489 if (current
->_raw_size
== 0 ||
2490 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2492 section
.s_scnptr
= 0;
2496 section
.s_scnptr
= current
->filepos
;
2498 section
.s_relptr
= current
->rel_filepos
;
2499 section
.s_lnnoptr
= current
->line_filepos
;
2500 section
.s_nreloc
= current
->reloc_count
;
2501 section
.s_nlnno
= current
->lineno_count
;
2502 if (current
->reloc_count
!= 0)
2504 if (current
->lineno_count
!= 0)
2508 /* Indicate the use of an XCOFF overflow section header. */
2509 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2511 section
.s_nreloc
= 0xffff;
2512 section
.s_nlnno
= 0xffff;
2516 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
2518 if (!strcmp (current
->name
, _TEXT
))
2522 else if (!strcmp (current
->name
, _DATA
))
2526 else if (!strcmp (current
->name
, _BSS
))
2532 section
.s_align
= (current
->alignment_power
2533 ? 1 << current
->alignment_power
2538 #ifdef COFF_IMAGE_WITH_PE
2539 /* suppress output of the sections if they are null. ld includes
2540 the bss and data sections even if there is no size assigned
2541 to them. NT loader doesn't like it if these section headers are
2542 included if the sections themselves are not needed */
2543 if (section
.s_size
== 0)
2544 internal_f
.f_nscns
--;
2549 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
2550 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2555 /* PE stores COMDAT section information in the symbol table. If
2556 this section is supposed to have some COMDAT info, track down
2557 the symbol in the symbol table and modify it. */
2558 if ((current
->flags
& SEC_LINK_ONCE
) != 0)
2560 unsigned int i
, count
;
2562 coff_symbol_type
*csym
;
2564 count
= bfd_get_symcount (abfd
);
2565 for (i
= 0, psym
= abfd
->outsymbols
; i
< count
; i
++, psym
++)
2567 /* Here *PSYM is the section symbol for CURRENT. */
2569 if (strcmp ((*psym
)->name
, current
->name
) == 0)
2571 csym
= coff_symbol_from (abfd
, *psym
);
2573 || csym
->native
== NULL
2574 || csym
->native
->u
.syment
.n_numaux
< 1
2575 || csym
->native
->u
.syment
.n_sclass
!= C_STAT
2576 || csym
->native
->u
.syment
.n_type
!= T_NULL
)
2583 Note that we might not if we're converting the file from
2584 some other object file format. */
2587 combined_entry_type
*aux
;
2589 /* We don't touch the x_checksum field. The
2590 x_associated field is not currently supported. */
2592 aux
= csym
->native
+ 1;
2593 switch (current
->flags
& SEC_LINK_DUPLICATES
)
2595 case SEC_LINK_DUPLICATES_DISCARD
:
2596 aux
->u
.auxent
.x_scn
.x_comdat
= IMAGE_COMDAT_SELECT_ANY
;
2599 case SEC_LINK_DUPLICATES_ONE_ONLY
:
2600 aux
->u
.auxent
.x_scn
.x_comdat
=
2601 IMAGE_COMDAT_SELECT_NODUPLICATES
;
2604 case SEC_LINK_DUPLICATES_SAME_SIZE
:
2605 aux
->u
.auxent
.x_scn
.x_comdat
=
2606 IMAGE_COMDAT_SELECT_SAME_SIZE
;
2609 case SEC_LINK_DUPLICATES_SAME_CONTENTS
:
2610 aux
->u
.auxent
.x_scn
.x_comdat
=
2611 IMAGE_COMDAT_SELECT_EXACT_MATCH
;
2616 #endif /* COFF_WITH_PE */
2620 /* XCOFF handles overflows in the reloc and line number count fields
2621 by creating a new section header to hold the correct values. */
2622 for (current
= abfd
->sections
; current
!= NULL
; current
= current
->next
)
2624 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2626 struct internal_scnhdr scnhdr
;
2629 internal_f
.f_nscns
++;
2630 strncpy (&(scnhdr
.s_name
[0]), current
->name
, 8);
2631 scnhdr
.s_paddr
= current
->reloc_count
;
2632 scnhdr
.s_vaddr
= current
->lineno_count
;
2634 scnhdr
.s_scnptr
= 0;
2635 scnhdr
.s_relptr
= current
->rel_filepos
;
2636 scnhdr
.s_lnnoptr
= current
->line_filepos
;
2637 scnhdr
.s_nreloc
= current
->target_index
;
2638 scnhdr
.s_nlnno
= current
->target_index
;
2639 scnhdr
.s_flags
= STYP_OVRFLO
;
2640 if (coff_swap_scnhdr_out (abfd
, &scnhdr
, &buff
) == 0
2641 || bfd_write ((PTR
) &buff
, 1, SCNHSZ
, abfd
) != SCNHSZ
)
2647 /* OK, now set up the filehdr... */
2649 /* Don't include the internal abs section in the section count */
2652 We will NOT put a fucking timestamp in the header here. Every time you
2653 put it back, I will come in and take it out again. I'm sorry. This
2654 field does not belong here. We fill it with a 0 so it compares the
2655 same but is not a reasonable time. -- gnu@cygnus.com
2657 internal_f
.f_timdat
= 0;
2659 internal_f
.f_flags
= 0;
2661 if (abfd
->flags
& EXEC_P
)
2662 internal_f
.f_opthdr
= AOUTSZ
;
2665 internal_f
.f_opthdr
= 0;
2667 if (xcoff_data (abfd
)->full_aouthdr
)
2668 internal_f
.f_opthdr
= AOUTSZ
;
2670 internal_f
.f_opthdr
= SMALL_AOUTSZ
;
2675 internal_f
.f_flags
|= F_RELFLG
;
2677 internal_f
.f_flags
|= F_LNNO
;
2678 if (abfd
->flags
& EXEC_P
)
2679 internal_f
.f_flags
|= F_EXEC
;
2681 /* FIXME: this is wrong for PPC_PE! */
2682 if (bfd_little_endian (abfd
))
2683 internal_f
.f_flags
|= F_AR32WR
;
2685 internal_f
.f_flags
|= F_AR32W
;
2688 FIXME, should do something about the other byte orders and
2693 if ((abfd
->flags
& DYNAMIC
) != 0)
2694 internal_f
.f_flags
|= F_SHROBJ
;
2695 if (bfd_get_section_by_name (abfd
, _LOADER
) != NULL
)
2696 internal_f
.f_flags
|= F_DYNLOAD
;
2699 memset (&internal_a
, 0, sizeof internal_a
);
2701 /* Set up architecture-dependent stuff */
2704 unsigned int magic
= 0;
2705 unsigned short flags
= 0;
2706 coff_set_flags (abfd
, &magic
, &flags
);
2707 internal_f
.f_magic
= magic
;
2708 internal_f
.f_flags
|= flags
;
2709 /* ...and the "opt"hdr... */
2712 #ifdef ULTRA3 /* NYU's machine */
2713 /* FIXME: This is a bogus check. I really want to see if there
2714 * is a .shbss or a .shdata section, if so then set the magic
2715 * number to indicate a shared data executable.
2717 if (internal_f
.f_nscns
>= 7)
2718 internal_a
.magic
= SHMAGIC
; /* Shared magic */
2721 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
2722 #define __A_MAGIC_SET__
2725 internal_a
.magic
= TIC80MAGIC
;
2726 #define __A_MAGIC_SET__
2729 /* FIXME: What are the a.out magic numbers for the i860? */
2730 internal_a
.magic
= 0;
2731 #define __A_MAGIC_SET__
2734 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
2735 #define __A_MAGIC_SET__
2738 #define __A_MAGIC_SET__
2739 internal_a
.magic
= PAGEMAGICBCS
;
2743 #define __A_MAGIC_SET__
2744 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2747 #if defined(M68) || defined(WE32K) || defined(M68K)
2748 #define __A_MAGIC_SET__
2750 internal_a
.magic
= LYNXCOFFMAGIC
;
2752 #if defined(TARG_AUX)
2753 internal_a
.magic
= (abfd
->flags
& D_PAGED
? PAGEMAGICPEXECPAGED
:
2754 abfd
->flags
& WP_TEXT
? PAGEMAGICPEXECSWAPPED
:
2755 PAGEMAGICEXECSWAPPED
);
2757 #if defined (PAGEMAGICPEXECPAGED)
2758 internal_a
.magic
= PAGEMAGICPEXECPAGED
;
2760 #endif /* TARG_AUX */
2762 #endif /* M68 || WE32K || M68K */
2765 #define __A_MAGIC_SET__
2766 internal_a
.magic
= ZMAGIC
;
2769 #define __A_MAGIC_SET__
2770 internal_a
.magic
= IMAGE_NT_OPTIONAL_HDR_MAGIC
;
2773 #define __A_MAGIC_SET__
2775 internal_a
.magic
= LYNXCOFFMAGIC
;
2777 internal_a
.magic
= ZMAGIC
;
2782 #define __A_MAGIC_SET__
2784 internal_a
.magic
= LYNXCOFFMAGIC
;
2789 #define __A_MAGIC_SET__
2790 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2791 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2792 RS6K_AOUTHDR_OMAGIC
;
2795 #ifndef __A_MAGIC_SET__
2796 #include "Your aouthdr magic number is not being set!"
2798 #undef __A_MAGIC_SET__
2802 /* FIXME: Does anybody ever set this to another value? */
2803 internal_a
.vstamp
= 0;
2805 /* Now should write relocs, strings, syms */
2806 obj_sym_filepos (abfd
) = sym_base
;
2808 if (bfd_get_symcount (abfd
) != 0)
2812 if (!coff_add_missing_symbols (abfd
))
2815 if (!coff_renumber_symbols (abfd
, &firstundef
))
2817 coff_mangle_symbols (abfd
);
2818 if (! coff_write_symbols (abfd
))
2820 if (! coff_write_linenumbers (abfd
))
2822 if (! coff_write_relocs (abfd
, firstundef
))
2825 #ifdef COFF_IMAGE_WITH_PE
2827 else if ((abfd
->flags
& EXEC_P
) != 0)
2831 /* PowerPC PE appears to require that all executable files be
2832 rounded up to the page size. */
2835 BFD_ALIGN (sym_base
, COFF_PAGE_SIZE
) - 1,
2837 || bfd_write (&b
, 1, 1, abfd
) != 1)
2843 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2844 backend linker, and obj_raw_syment_count is not valid until after
2845 coff_write_symbols is called. */
2846 if (obj_raw_syment_count (abfd
) != 0)
2848 internal_f
.f_symptr
= sym_base
;
2850 /* AIX appears to require that F_RELFLG not be set if there are
2851 local symbols but no relocations. */
2852 internal_f
.f_flags
&=~ F_RELFLG
;
2857 if (long_section_names
)
2858 internal_f
.f_symptr
= sym_base
;
2860 internal_f
.f_symptr
= 0;
2861 internal_f
.f_flags
|= F_LSYMS
;
2866 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2867 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2871 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2872 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2876 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2877 if (internal_a
.bsize
&& bss_sec
->vma
< internal_a
.data_start
)
2878 internal_a
.data_start
= bss_sec
->vma
;
2881 internal_a
.entry
= bfd_get_start_address (abfd
);
2882 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2885 if (xcoff_data (abfd
)->full_aouthdr
)
2888 asection
*loader_sec
;
2890 internal_a
.vstamp
= 1;
2892 internal_a
.o_snentry
= xcoff_data (abfd
)->snentry
;
2893 if (internal_a
.o_snentry
== 0)
2894 internal_a
.entry
= (bfd_vma
) -1;
2896 if (text_sec
!= NULL
)
2898 internal_a
.o_sntext
= text_sec
->target_index
;
2899 internal_a
.o_algntext
= bfd_get_section_alignment (abfd
, text_sec
);
2903 internal_a
.o_sntext
= 0;
2904 internal_a
.o_algntext
= 0;
2906 if (data_sec
!= NULL
)
2908 internal_a
.o_sndata
= data_sec
->target_index
;
2909 internal_a
.o_algndata
= bfd_get_section_alignment (abfd
, data_sec
);
2913 internal_a
.o_sndata
= 0;
2914 internal_a
.o_algndata
= 0;
2916 loader_sec
= bfd_get_section_by_name (abfd
, ".loader");
2917 if (loader_sec
!= NULL
)
2918 internal_a
.o_snloader
= loader_sec
->target_index
;
2920 internal_a
.o_snloader
= 0;
2921 if (bss_sec
!= NULL
)
2922 internal_a
.o_snbss
= bss_sec
->target_index
;
2924 internal_a
.o_snbss
= 0;
2926 toc
= xcoff_data (abfd
)->toc
;
2927 internal_a
.o_toc
= toc
;
2928 internal_a
.o_sntoc
= xcoff_data (abfd
)->sntoc
;
2930 internal_a
.o_modtype
= xcoff_data (abfd
)->modtype
;
2931 if (xcoff_data (abfd
)->cputype
!= -1)
2932 internal_a
.o_cputype
= xcoff_data (abfd
)->cputype
;
2935 switch (bfd_get_arch (abfd
))
2937 case bfd_arch_rs6000
:
2938 internal_a
.o_cputype
= 4;
2940 case bfd_arch_powerpc
:
2941 if (bfd_get_mach (abfd
) == 0)
2942 internal_a
.o_cputype
= 3;
2944 internal_a
.o_cputype
= 1;
2950 internal_a
.o_maxstack
= xcoff_data (abfd
)->maxstack
;
2951 internal_a
.o_maxdata
= xcoff_data (abfd
)->maxdata
;
2955 /* now write them */
2956 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2960 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) buff
);
2961 if (bfd_write ((PTR
) buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2964 if (abfd
->flags
& EXEC_P
)
2966 /* Note that peicode.h fills in a PEAOUTHDR, not an AOUTHDR.
2967 include/coff/pe.h sets AOUTSZ == sizeof(PEAOUTHDR)) */
2969 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) buff
);
2970 if (bfd_write ((PTR
) buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2979 /* XCOFF seems to always write at least a small a.out header. */
2980 coff_swap_aouthdr_out (abfd
, (PTR
) &internal_a
, (PTR
) &buff
);
2981 if (xcoff_data (abfd
)->full_aouthdr
)
2984 size
= SMALL_AOUTSZ
;
2985 if (bfd_write ((PTR
) &buff
, 1, size
, abfd
) != size
)
2994 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2999 bfd_size_type count
;
3001 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
3002 coff_compute_section_file_positions (abfd
);
3004 #if defined(_LIB) && !defined(TARG_AUX)
3006 /* The physical address field of a .lib section is used to hold the
3007 number of shared libraries in the section. This code counts the
3008 number of sections being written, and increments the lma field
3011 I have found no documentation on the contents of this section.
3012 Experimentation indicates that the section contains zero or more
3013 records, each of which has the following structure:
3015 - a (four byte) word holding the length of this record, in words,
3016 - a word that always seems to be set to "2",
3017 - the path to a shared library, null-terminated and then padded
3018 to a whole word boundary.
3020 bfd_assert calls have been added to alert if an attempt is made
3021 to write a section which doesn't follow these assumptions. The
3022 code has been tested on ISC 4.1 by me, and on SCO by Robert Lipe
3023 <robertl@arnet.com> (Thanks!).
3025 Gvran Uddeborg <gvran@uddeborg.pp.se> */
3027 if (strcmp (section
->name
, _LIB
) == 0)
3029 bfd_byte
*rec
, *recend
;
3031 rec
= (bfd_byte
*) location
;
3032 recend
= rec
+ count
;
3033 while (rec
< recend
)
3036 rec
+= bfd_get_32 (abfd
, rec
) * 4;
3039 BFD_ASSERT (rec
== recend
);
3044 /* Don't write out bss sections - one way to do this is to
3045 see if the filepos has not been set. */
3046 if (section
->filepos
== 0)
3049 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
3054 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
3060 coff_close_and_cleanup (abfd
)
3063 if (!bfd_read_p (abfd
))
3064 switch (abfd
->format
)
3067 if (!_bfd_write_archive_contents (abfd
))
3071 if (!coff_write_object_contents (abfd
))
3075 bfd_set_error (bfd_error_invalid_operation
);
3079 /* We depend on bfd_close to free all the memory on the obstack. */
3080 /* FIXME if bfd_release is not using obstacks! */
3087 buy_and_read (abfd
, where
, seek_direction
, size
)
3093 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
3096 if (bfd_seek (abfd
, where
, seek_direction
) != 0
3097 || bfd_read (area
, 1, size
, abfd
) != size
)
3100 } /* buy_and_read() */
3106 Creating the linenumber table is done by reading in the entire
3107 coff linenumber table, and creating another table for internal use.
3109 A coff linenumber table is structured so that each function
3110 is marked as having a line number of 0. Each line within the
3111 function is an offset from the first line in the function. The
3112 base of the line number information for the table is stored in
3113 the symbol associated with the function.
3115 The information is copied from the external to the internal
3116 table, and each symbol which marks a function is marked by
3119 How does this work ?
3124 coff_slurp_line_table (abfd
, asect
)
3128 LINENO
*native_lineno
;
3129 alent
*lineno_cache
;
3131 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
3133 native_lineno
= (LINENO
*) buy_and_read (abfd
,
3134 asect
->line_filepos
,
3137 asect
->lineno_count
));
3139 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
3140 if (lineno_cache
== NULL
)
3144 unsigned int counter
= 0;
3145 alent
*cache_ptr
= lineno_cache
;
3146 LINENO
*src
= native_lineno
;
3148 while (counter
< asect
->lineno_count
)
3150 struct internal_lineno dst
;
3151 coff_swap_lineno_in (abfd
, src
, &dst
);
3152 cache_ptr
->line_number
= dst
.l_lnno
;
3154 if (cache_ptr
->line_number
== 0)
3158 coff_symbol_type
*sym
;
3161 symndx
= dst
.l_addr
.l_symndx
;
3162 if (symndx
< 0 || symndx
>= obj_raw_syment_count (abfd
))
3164 (*_bfd_error_handler
)
3165 ("%s: warning: illegal symbol index %ld in line numbers",
3166 bfd_get_filename (abfd
), dst
.l_addr
.l_symndx
);
3170 /* FIXME: We should not be casting between ints and
3171 pointers like this. */
3172 sym
= ((coff_symbol_type
*)
3173 ((symndx
+ obj_raw_syments (abfd
))
3174 ->u
.syment
._n
._n_n
._n_zeroes
));
3175 cache_ptr
->u
.sym
= (asymbol
*) sym
;
3176 if (sym
->lineno
!= NULL
&& ! warned
)
3178 (*_bfd_error_handler
)
3179 ("%s: warning: duplicate line number information for `%s'",
3180 bfd_get_filename (abfd
),
3181 bfd_asymbol_name (&sym
->symbol
));
3183 sym
->lineno
= cache_ptr
;
3187 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
3188 - bfd_section_vma (abfd
, asect
);
3189 } /* If no linenumber expect a symbol index */
3195 cache_ptr
->line_number
= 0;
3198 asect
->lineno
= lineno_cache
;
3199 /* FIXME, free native_lineno here, or use alloca or something. */
3204 coff_slurp_symbol_table (abfd
)
3207 combined_entry_type
*native_symbols
;
3208 coff_symbol_type
*cached_area
;
3209 unsigned int *table_ptr
;
3211 unsigned int number_of_symbols
= 0;
3213 if (obj_symbols (abfd
))
3216 /* Read in the symbol table */
3217 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
3222 /* Allocate enough room for all the symbols in cached form */
3223 cached_area
= ((coff_symbol_type
*)
3225 (obj_raw_syment_count (abfd
)
3226 * sizeof (coff_symbol_type
))));
3228 if (cached_area
== NULL
)
3230 table_ptr
= ((unsigned int *)
3232 (obj_raw_syment_count (abfd
)
3233 * sizeof (unsigned int))));
3235 if (table_ptr
== NULL
)
3239 coff_symbol_type
*dst
= cached_area
;
3240 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
3241 unsigned int this_index
= 0;
3242 while (this_index
< last_native_index
)
3244 combined_entry_type
*src
= native_symbols
+ this_index
;
3245 table_ptr
[this_index
] = number_of_symbols
;
3246 dst
->symbol
.the_bfd
= abfd
;
3248 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
3249 /* We use the native name field to point to the cached field. */
3250 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
3251 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
3252 src
->u
.syment
.n_scnum
);
3253 dst
->symbol
.flags
= 0;
3254 dst
->done_lineno
= false;
3256 switch (src
->u
.syment
.n_sclass
)
3261 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
3262 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
3263 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
3265 /* Fall through to next case */
3274 /* PE uses storage class 0x68 to denote a section symbol */
3276 /* PE uses storage class 0x67 for a weak external symbol. */
3279 if ((src
->u
.syment
.n_scnum
) == 0)
3281 if ((src
->u
.syment
.n_value
) == 0)
3283 dst
->symbol
.section
= bfd_und_section_ptr
;
3284 dst
->symbol
.value
= 0;
3288 dst
->symbol
.section
= bfd_com_section_ptr
;
3289 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3294 /* Base the value as an index from the base of the
3297 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
3298 dst
->symbol
.value
= (src
->u
.syment
.n_value
3299 - dst
->symbol
.section
->vma
);
3301 if (ISFCN ((src
->u
.syment
.n_type
)))
3303 /* A function ext does not go at the end of a
3305 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
3310 /* A C_HIDEXT symbol is not global. */
3311 if (src
->u
.syment
.n_sclass
== C_HIDEXT
)
3312 dst
->symbol
.flags
= BSF_LOCAL
;
3313 /* A symbol with a csect entry should not go at the end. */
3314 if (src
->u
.syment
.n_numaux
> 0)
3315 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
3319 if (src
->u
.syment
.n_sclass
== C_NT_WEAK
)
3320 dst
->symbol
.flags
= BSF_WEAK
;
3325 case C_STAT
: /* static */
3327 case C_LEAFSTAT
: /* static leaf procedure */
3329 case C_LABEL
: /* label */
3330 if (src
->u
.syment
.n_scnum
== -2)
3331 dst
->symbol
.flags
= BSF_DEBUGGING
;
3333 dst
->symbol
.flags
= BSF_LOCAL
;
3335 /* Base the value as an index from the base of the
3336 section, if there is one. */
3337 if (dst
->symbol
.section
)
3338 dst
->symbol
.value
= (src
->u
.syment
.n_value
3339 - dst
->symbol
.section
->vma
);
3341 dst
->symbol
.value
= src
->u
.syment
.n_value
;
3344 case C_MOS
: /* member of structure */
3345 case C_EOS
: /* end of structure */
3346 #ifdef NOTDEF /* C_AUTOARG has the same value */
3348 case C_GLBLREG
: /* A29k-specific storage class */
3351 case C_REGPARM
: /* register parameter */
3352 case C_REG
: /* register variable */
3354 case C_AUTOARG
: /* 960-specific storage class */
3356 case C_TPDEF
: /* type definition */
3358 case C_AUTO
: /* automatic variable */
3359 case C_FIELD
: /* bit field */
3360 case C_ENTAG
: /* enumeration tag */
3361 case C_MOE
: /* member of enumeration */
3362 case C_MOU
: /* member of union */
3363 case C_UNTAG
: /* union tag */
3364 dst
->symbol
.flags
= BSF_DEBUGGING
;
3365 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3368 case C_FILE
: /* file name */
3369 case C_STRTAG
: /* structure tag */
3384 dst
->symbol
.flags
= BSF_DEBUGGING
;
3385 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3389 case C_BINCL
: /* beginning of include file */
3390 case C_EINCL
: /* ending of include file */
3391 /* The value is actually a pointer into the line numbers
3392 of the file. We locate the line number entry, and
3393 set the section to the section which contains it, and
3394 the value to the index in that section. */
3398 dst
->symbol
.flags
= BSF_DEBUGGING
;
3399 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
3400 if (sec
->line_filepos
<= (file_ptr
) src
->u
.syment
.n_value
3401 && ((file_ptr
) (sec
->line_filepos
3402 + sec
->lineno_count
* LINESZ
)
3403 > (file_ptr
) src
->u
.syment
.n_value
))
3406 dst
->symbol
.value
= 0;
3409 dst
->symbol
.section
= sec
;
3410 dst
->symbol
.value
= ((src
->u
.syment
.n_value
3411 - sec
->line_filepos
)
3419 dst
->symbol
.flags
= BSF_DEBUGGING
;
3421 /* The value is actually a symbol index. Save a pointer
3422 to the symbol instead of the index. FIXME: This
3423 should use a union. */
3424 src
->u
.syment
.n_value
=
3425 (long) (native_symbols
+ src
->u
.syment
.n_value
);
3426 dst
->symbol
.value
= src
->u
.syment
.n_value
;
3431 case C_BLOCK
: /* ".bb" or ".eb" */
3432 case C_FCN
: /* ".bf" or ".ef" */
3433 case C_EFCN
: /* physical end of function */
3434 dst
->symbol
.flags
= BSF_LOCAL
;
3435 /* Base the value as an index from the base of the
3437 dst
->symbol
.value
= (src
->u
.syment
.n_value
3438 - dst
->symbol
.section
->vma
);
3442 case C_EXTDEF
: /* external definition */
3443 case C_ULABEL
: /* undefined label */
3444 case C_USTATIC
: /* undefined static */
3445 #ifndef COFF_WITH_PE
3446 /* C_LINE in regular coff is 0x68. NT has taken over this storage
3447 class to represent a section symbol */
3448 case C_LINE
: /* line # reformatted as symbol table entry */
3449 /* NT uses 0x67 for a weak symbol, not C_ALIAS. */
3450 case C_ALIAS
: /* duplicate tag */
3452 case C_HIDDEN
: /* ext symbol in dmert public lib */
3454 (*_bfd_error_handler
)
3455 ("%s: Unrecognized storage class %d for %s symbol `%s'",
3456 bfd_get_filename (abfd
), src
->u
.syment
.n_sclass
,
3457 dst
->symbol
.section
->name
, dst
->symbol
.name
);
3458 dst
->symbol
.flags
= BSF_DEBUGGING
;
3459 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3463 /* BFD_ASSERT(dst->symbol.flags != 0);*/
3467 dst
->symbol
.udata
.i
= 0;
3468 dst
->lineno
= (alent
*) NULL
;
3469 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
3471 number_of_symbols
++;
3472 } /* walk the native symtab */
3473 } /* bfdize the native symtab */
3475 obj_symbols (abfd
) = cached_area
;
3476 obj_raw_syments (abfd
) = native_symbols
;
3478 bfd_get_symcount (abfd
) = number_of_symbols
;
3479 obj_convert (abfd
) = table_ptr
;
3480 /* Slurp the line tables for each section too */
3486 coff_slurp_line_table (abfd
, p
);
3491 } /* coff_slurp_symbol_table() */
3493 /* Check whether a symbol is globally visible. This is used by the
3494 COFF backend linker code in cofflink.c, since a couple of targets
3495 have globally visible symbols which are not class C_EXT. This
3496 function need not handle the case of n_class == C_EXT. */
3498 #undef OTHER_GLOBAL_CLASS
3501 #define OTHER_GLOBAL_CLASS C_LEAFEXT
3505 #define OTHER_GLOBAL_CLASS C_SECTION
3508 #ifdef OTHER_GLOBAL_CLASS
3511 coff_sym_is_global (abfd
, syment
)
3513 struct internal_syment
*syment
;
3515 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
3520 #undef OTHER_GLOBAL_CLASS
3522 #else /* ! defined (OTHER_GLOBAL_CLASS) */
3524 /* sym_is_global should not be defined if it has nothing to do. */
3526 #define coff_sym_is_global 0
3528 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
3534 Coff relocations are easily transformed into the internal BFD form
3537 Reading a coff relocation table is done in the following stages:
3539 o Read the entire coff relocation table into memory.
3541 o Process each relocation in turn; first swap it from the
3542 external to the internal form.
3544 o Turn the symbol referenced in the relocation's symbol index
3545 into a pointer into the canonical symbol table.
3546 This table is the same as the one returned by a call to
3547 @code{bfd_canonicalize_symtab}. The back end will call that
3548 routine and save the result if a canonicalization hasn't been done.
3550 o The reloc index is turned into a pointer to a howto
3551 structure, in a back end specific way. For instance, the 386
3552 and 960 use the @code{r_type} to directly produce an index
3553 into a howto table vector; the 88k subtracts a number from the
3554 @code{r_type} field and creates an addend field.
3560 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
3562 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
3563 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
3564 coffsym = (obj_symbols (abfd) \
3565 + (cache_ptr->sym_ptr_ptr - symbols)); \
3567 coffsym = coff_symbol_from (abfd, ptr); \
3568 if (coffsym != (coff_symbol_type *) NULL \
3569 && coffsym->native->u.syment.n_scnum == 0) \
3570 cache_ptr->addend = 0; \
3571 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
3572 && ptr->section != (asection *) NULL) \
3573 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
3575 cache_ptr->addend = 0; \
3580 coff_slurp_reloc_table (abfd
, asect
, symbols
)
3585 RELOC
*native_relocs
;
3586 arelent
*reloc_cache
;
3591 if (asect
->relocation
)
3593 if (asect
->reloc_count
== 0)
3595 if (asect
->flags
& SEC_CONSTRUCTOR
)
3597 if (!coff_slurp_symbol_table (abfd
))
3600 (RELOC
*) buy_and_read (abfd
,
3604 asect
->reloc_count
));
3605 reloc_cache
= (arelent
*)
3606 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
3608 if (reloc_cache
== NULL
)
3612 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
3614 #ifdef RELOC_PROCESSING
3615 struct internal_reloc dst
;
3616 struct external_reloc
*src
;
3618 cache_ptr
= reloc_cache
+ idx
;
3619 src
= native_relocs
+ idx
;
3620 coff_swap_reloc_in (abfd
, src
, &dst
);
3622 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
3624 struct internal_reloc dst
;
3626 struct external_reloc
*src
;
3628 cache_ptr
= reloc_cache
+ idx
;
3629 src
= native_relocs
+ idx
;
3631 coff_swap_reloc_in (abfd
, src
, &dst
);
3634 cache_ptr
->address
= dst
.r_vaddr
;
3636 if (dst
.r_symndx
!= -1)
3638 if (dst
.r_symndx
< 0 || dst
.r_symndx
>= obj_conv_table_size (abfd
))
3640 (*_bfd_error_handler
)
3641 ("%s: warning: illegal symbol index %ld in relocs",
3642 bfd_get_filename (abfd
), dst
.r_symndx
);
3643 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
3648 cache_ptr
->sym_ptr_ptr
= (symbols
3649 + obj_convert (abfd
)[dst
.r_symndx
]);
3650 ptr
= *(cache_ptr
->sym_ptr_ptr
);
3655 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
3659 /* The symbols definitions that we have read in have been
3660 relocated as if their sections started at 0. But the offsets
3661 refering to the symbols in the raw data have not been
3662 modified, so we have to have a negative addend to compensate.
3664 Note that symbols which used to be common must be left alone */
3666 /* Calculate any reloc addend by looking at the symbol */
3667 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
3669 cache_ptr
->address
-= asect
->vma
;
3670 /* !! cache_ptr->section = (asection *) NULL;*/
3672 /* Fill in the cache_ptr->howto field from dst.r_type */
3673 RTYPE2HOWTO (cache_ptr
, &dst
);
3676 if (cache_ptr
->howto
== NULL
)
3678 (*_bfd_error_handler
)
3679 ("%s: illegal relocation type %d at address 0x%lx",
3680 bfd_get_filename (abfd
), dst
.r_type
, (long) dst
.r_vaddr
);
3681 bfd_set_error (bfd_error_bad_value
);
3686 asect
->relocation
= reloc_cache
;
3690 #ifndef coff_rtype_to_howto
3693 /* Get the howto structure for a reloc. This is only used if the file
3694 including this one defines coff_relocate_section to be
3695 _bfd_coff_generic_relocate_section, so it is OK if it does not
3696 always work. It is the responsibility of the including file to
3697 make sure it is reasonable if it is needed. */
3699 static reloc_howto_type
*coff_rtype_to_howto
3700 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
3701 struct coff_link_hash_entry
*, struct internal_syment
*,
3705 static reloc_howto_type
*
3706 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
3709 struct internal_reloc
*rel
;
3710 struct coff_link_hash_entry
*h
;
3711 struct internal_syment
*sym
;
3716 RTYPE2HOWTO (&genrel
, rel
);
3717 return genrel
.howto
;
3720 #else /* ! defined (RTYPE2HOWTO) */
3722 #define coff_rtype_to_howto NULL
3724 #endif /* ! defined (RTYPE2HOWTO) */
3725 #endif /* ! defined (coff_rtype_to_howto) */
3727 /* This is stupid. This function should be a boolean predicate. */
3729 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
3735 arelent
*tblptr
= section
->relocation
;
3736 unsigned int count
= 0;
3739 if (section
->flags
& SEC_CONSTRUCTOR
)
3741 /* this section has relocs made up by us, they are not in the
3742 file, so take them out of their chain and place them into
3743 the data area provided */
3744 arelent_chain
*chain
= section
->constructor_chain
;
3745 for (count
= 0; count
< section
->reloc_count
; count
++)
3747 *relptr
++ = &chain
->relent
;
3748 chain
= chain
->next
;
3754 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
3757 tblptr
= section
->relocation
;
3759 for (; count
++ < section
->reloc_count
;)
3760 *relptr
++ = tblptr
++;
3765 return section
->reloc_count
;
3770 coff_sym_filepos (abfd
)
3773 return obj_sym_filepos (abfd
);
3777 #ifndef coff_reloc16_estimate
3778 #define coff_reloc16_estimate dummy_reloc16_estimate
3781 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
3783 asection
*input_section
;
3785 unsigned int shrink
;
3786 struct bfd_link_info
*link_info
;
3793 #ifndef coff_reloc16_extra_cases
3794 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3795 /* This works even if abort is not declared in any header file. */
3797 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
3800 struct bfd_link_info
*link_info
;
3801 struct bfd_link_order
*link_order
;
3804 unsigned int *src_ptr
;
3805 unsigned int *dst_ptr
;
3811 /* If coff_relocate_section is defined, we can use the optimized COFF
3812 backend linker. Otherwise we must continue to use the old linker. */
3813 #ifdef coff_relocate_section
3814 #ifndef coff_bfd_link_hash_table_create
3815 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3817 #ifndef coff_bfd_link_add_symbols
3818 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3820 #ifndef coff_bfd_final_link
3821 #define coff_bfd_final_link _bfd_coff_final_link
3823 #else /* ! defined (coff_relocate_section) */
3824 #define coff_relocate_section NULL
3825 #ifndef coff_bfd_link_hash_table_create
3826 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3828 #ifndef coff_bfd_link_add_symbols
3829 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3831 #define coff_bfd_final_link _bfd_generic_final_link
3832 #endif /* ! defined (coff_relocate_section) */
3833 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3835 #ifndef coff_start_final_link
3836 #define coff_start_final_link NULL
3839 #ifndef coff_adjust_symndx
3840 #define coff_adjust_symndx NULL
3843 #ifndef coff_link_add_one_symbol
3844 #define coff_link_add_one_symbol _bfd_generic_link_add_one_symbol
3847 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
3849 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
3850 coff_swap_aux_out
, coff_swap_sym_out
,
3851 coff_swap_lineno_out
, coff_swap_reloc_out
,
3852 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
3853 coff_swap_scnhdr_out
,
3854 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
3855 #ifdef COFF_LONG_FILENAMES
3860 #ifdef COFF_LONG_SECTION_NAMES
3865 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
3866 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
3867 coff_mkobject_hook
, styp_to_sec_flags
, coff_set_alignment_hook
,
3868 coff_slurp_symbol_table
, symname_in_debug_hook
, coff_pointerize_aux_hook
,
3869 coff_print_aux
, coff_reloc16_extra_cases
, coff_reloc16_estimate
,
3870 coff_sym_is_global
, coff_compute_section_file_positions
,
3871 coff_start_final_link
, coff_relocate_section
, coff_rtype_to_howto
,
3872 coff_adjust_symndx
, coff_link_add_one_symbol
3875 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3876 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3877 #define coff_get_section_contents _bfd_generic_get_section_contents
3879 #ifndef coff_bfd_copy_private_symbol_data
3880 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3883 #ifndef coff_bfd_copy_private_section_data
3884 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3887 #ifndef coff_bfd_copy_private_bfd_data
3888 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3891 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3892 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3894 #ifndef coff_bfd_print_private_bfd_data
3895 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3898 #ifndef coff_bfd_is_local_label
3899 #define coff_bfd_is_local_label bfd_generic_is_local_label
3901 #ifndef coff_read_minisymbols
3902 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3904 #ifndef coff_minisymbol_to_symbol
3905 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3908 /* The reloc lookup routine must be supplied by each individual COFF
3910 #ifndef coff_bfd_reloc_type_lookup
3911 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3914 #ifndef coff_bfd_get_relocated_section_contents
3915 #define coff_bfd_get_relocated_section_contents \
3916 bfd_generic_get_relocated_section_contents
3918 #ifndef coff_bfd_relax_section
3919 #define coff_bfd_relax_section bfd_generic_relax_section