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;
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
;
1502 /* start-sanitize-h8s */
1505 arch
= bfd_arch_h8300
;
1506 machine
= bfd_mach_h8300s
;
1507 /* !! FIXME this probably isn't the right place for this */
1508 abfd
->flags
|= BFD_IS_RELAXABLE
;
1512 /* end-sanitize-h8s */
1513 #ifdef SH_ARCH_MAGIC_BIG
1514 case SH_ARCH_MAGIC_BIG
:
1515 case SH_ARCH_MAGIC_LITTLE
:
1523 arch
= bfd_arch_h8500
;
1530 #ifdef LYNXCOFFMAGIC
1533 arch
= bfd_arch_sparc
;
1538 default: /* Unreadable input file type */
1539 arch
= bfd_arch_obscure
;
1543 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1547 #ifdef SYMNAME_IN_DEBUG
1550 symname_in_debug_hook (abfd
, sym
)
1552 struct internal_syment
*sym
;
1554 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1559 #define symname_in_debug_hook \
1560 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1566 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1568 static boolean coff_pointerize_aux_hook
1569 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1570 unsigned int, combined_entry_type
*));
1574 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1576 combined_entry_type
*table_base
;
1577 combined_entry_type
*symbol
;
1578 unsigned int indaux
;
1579 combined_entry_type
*aux
;
1581 int class = symbol
->u
.syment
.n_sclass
;
1583 if ((class == C_EXT
|| class == C_HIDEXT
)
1584 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1586 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
1588 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
1589 table_base
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
1590 aux
->fix_scnlen
= 1;
1593 /* Return true to indicate that the caller should not do any
1594 further work on this auxent. */
1598 /* Return false to indicate that this auxent should be handled by
1606 /* We don't want to pointerize bal entries. */
1608 static boolean coff_pointerize_aux_hook
1609 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1610 unsigned int, combined_entry_type
*));
1614 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1616 combined_entry_type
*table_base
;
1617 combined_entry_type
*symbol
;
1618 unsigned int indaux
;
1619 combined_entry_type
*aux
;
1621 /* Return true if we don't want to pointerize this aux entry, which
1622 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1624 && (symbol
->u
.syment
.n_sclass
== C_LEAFPROC
1625 || symbol
->u
.syment
.n_sclass
== C_LEAFSTAT
1626 || symbol
->u
.syment
.n_sclass
== C_LEAFEXT
));
1631 #define coff_pointerize_aux_hook 0
1634 #endif /* ! RS6000COFF_C */
1636 /* Print an aux entry. This returns true if it has printed it. */
1638 static boolean coff_print_aux
1639 PARAMS ((bfd
*, FILE *, combined_entry_type
*, combined_entry_type
*,
1640 combined_entry_type
*, unsigned int));
1643 coff_print_aux (abfd
, file
, table_base
, symbol
, aux
, indaux
)
1646 combined_entry_type
*table_base
;
1647 combined_entry_type
*symbol
;
1648 combined_entry_type
*aux
;
1649 unsigned int indaux
;
1652 if ((symbol
->u
.syment
.n_sclass
== C_EXT
1653 || symbol
->u
.syment
.n_sclass
== C_HIDEXT
)
1654 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1656 /* This is a csect entry. */
1657 fprintf (file
, "AUX ");
1658 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) != XTY_LD
)
1660 BFD_ASSERT (! aux
->fix_scnlen
);
1661 fprintf (file
, "val %5ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1665 fprintf (file
, "indx ");
1666 if (! aux
->fix_scnlen
)
1667 fprintf (file
, "%4ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1669 fprintf (file
, "%4ld",
1670 (long) (aux
->u
.auxent
.x_csect
.x_scnlen
.p
- table_base
));
1673 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1674 aux
->u
.auxent
.x_csect
.x_parmhash
,
1675 (unsigned int) aux
->u
.auxent
.x_csect
.x_snhash
,
1676 SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
),
1677 SMTYP_ALIGN (aux
->u
.auxent
.x_csect
.x_smtyp
),
1678 (unsigned int) aux
->u
.auxent
.x_csect
.x_smclas
,
1679 aux
->u
.auxent
.x_csect
.x_stab
,
1680 (unsigned int) aux
->u
.auxent
.x_csect
.x_snstab
);
1685 /* Return false to indicate that no special action was taken. */
1693 To write relocations, the back end steps though the
1694 canonical relocation table and create an
1695 @code{internal_reloc}. The symbol index to use is removed from
1696 the @code{offset} field in the symbol table supplied. The
1697 address comes directly from the sum of the section base
1698 address and the relocation offset; the type is dug directly
1699 from the howto field. Then the @code{internal_reloc} is
1700 swapped into the shape of an @code{external_reloc} and written
1707 static int compare_arelent_ptr
PARAMS ((const PTR
, const PTR
));
1709 /* AUX's ld wants relocations to be sorted */
1711 compare_arelent_ptr (x
, y
)
1715 const arelent
**a
= (const arelent
**) x
;
1716 const arelent
**b
= (const arelent
**) y
;
1717 bfd_size_type aadr
= (*a
)->address
;
1718 bfd_size_type badr
= (*b
)->address
;
1720 return (aadr
< badr
? -1 : badr
< aadr
? 1 : 0);
1723 #endif /* TARG_AUX */
1726 coff_write_relocs (abfd
, first_undef
)
1732 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1735 struct external_reloc dst
;
1741 /* sort relocations before we write them out */
1742 p
= (arelent
**) bfd_malloc (s
->reloc_count
* sizeof (arelent
*));
1743 if (p
== NULL
&& s
->reloc_count
> 0)
1745 memcpy (p
, s
->orelocation
, s
->reloc_count
* sizeof (arelent
*));
1746 qsort (p
, s
->reloc_count
, sizeof (arelent
*), compare_arelent_ptr
);
1749 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1751 for (i
= 0; i
< s
->reloc_count
; i
++)
1753 struct internal_reloc n
;
1755 memset ((PTR
) & n
, 0, sizeof (n
));
1757 /* Now we've renumbered the symbols we know where the
1758 undefined symbols live in the table. Check the reloc
1759 entries for symbols who's output bfd isn't the right one.
1760 This is because the symbol was undefined (which means
1761 that all the pointers are never made to point to the same
1762 place). This is a bad thing,'cause the symbols attached
1763 to the output bfd are indexed, so that the relocation
1764 entries know which symbol index they point to. So we
1765 have to look up the output symbol here. */
1767 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1770 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1771 asymbol
**outsyms
= abfd
->outsymbols
;
1772 for (i
= first_undef
; outsyms
[i
]; i
++)
1774 const char *intable
= outsyms
[i
]->name
;
1775 if (strcmp (intable
, sname
) == 0) {
1776 /* got a hit, so repoint the reloc */
1777 q
->sym_ptr_ptr
= outsyms
+ i
;
1783 n
.r_vaddr
= q
->address
+ s
->vma
;
1786 /* The 29k const/consth reloc pair is a real kludge. The consth
1787 part doesn't have a symbol; it has an offset. So rebuilt
1789 if (q
->howto
->type
== R_IHCONST
)
1790 n
.r_symndx
= q
->addend
;
1795 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1796 /* This is a relocation relative to the absolute symbol. */
1800 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1801 /* Take notice if the symbol reloc points to a symbol
1802 we don't have in our symbol table. What should we
1804 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1809 #ifdef SWAP_OUT_RELOC_OFFSET
1810 n
.r_offset
= q
->addend
;
1814 /* Work out reloc type from what is required */
1815 SELECT_RELOC (n
, q
->howto
);
1817 n
.r_type
= q
->howto
->type
;
1819 coff_swap_reloc_out (abfd
, &n
, &dst
);
1820 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1833 /* Set flags and magic number of a coff file from architecture and machine
1834 type. Result is true if we can represent the arch&type, false if not. */
1837 coff_set_flags (abfd
, magicp
, flagsp
)
1840 unsigned short *flagsp
;
1842 switch (bfd_get_arch (abfd
))
1847 switch (bfd_get_mach (abfd
))
1849 case bfd_mach_z8001
:
1852 case bfd_mach_z8002
:
1866 *magicp
= I960ROMAGIC
;
1868 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1869 I960RWMAGIC); FIXME???
1871 switch (bfd_get_mach (abfd
))
1873 case bfd_mach_i960_core
:
1876 case bfd_mach_i960_kb_sb
:
1879 case bfd_mach_i960_mc
:
1882 case bfd_mach_i960_xa
:
1885 case bfd_mach_i960_ca
:
1888 case bfd_mach_i960_ka_sa
:
1891 case bfd_mach_i960_jx
:
1894 case bfd_mach_i960_hx
:
1911 case bfd_arch_powerpc
:
1918 *magicp
= I386MAGIC
;
1920 /* Just overwrite the usual value if we're doing Lynx. */
1921 *magicp
= LYNXCOFFMAGIC
;
1928 *magicp
= I860MAGIC
;
1934 #ifdef APOLLOM68KMAGIC
1935 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1937 *magicp
= MC68MAGIC
;
1940 /* Just overwrite the usual value if we're doing Lynx. */
1941 *magicp
= LYNXCOFFMAGIC
;
1949 *magicp
= MC88OMAGIC
;
1954 case bfd_arch_h8300
:
1955 switch (bfd_get_mach (abfd
))
1957 case bfd_mach_h8300
:
1958 *magicp
= H8300MAGIC
;
1960 case bfd_mach_h8300h
:
1961 *magicp
= H8300HMAGIC
;
1963 /* start-sanitize-h8s */
1964 case bfd_mach_h8300s
:
1965 *magicp
= H8300SMAGIC
;
1967 /* end-sanitize-h8s */
1972 #ifdef SH_ARCH_MAGIC_BIG
1974 if (bfd_big_endian (abfd
))
1975 *magicp
= SH_ARCH_MAGIC_BIG
;
1977 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1983 case bfd_arch_sparc
:
1984 *magicp
= SPARCMAGIC
;
1986 /* Just overwrite the usual value if we're doing Lynx. */
1987 *magicp
= LYNXCOFFMAGIC
;
1994 case bfd_arch_h8500
:
1995 *magicp
= H8500MAGIC
;
1999 #ifdef A29K_MAGIC_BIG
2001 if (bfd_big_endian (abfd
))
2002 *magicp
= A29K_MAGIC_BIG
;
2004 *magicp
= A29K_MAGIC_LITTLE
;
2010 case bfd_arch_we32k
:
2011 *magicp
= WE32KMAGIC
;
2017 case bfd_arch_rs6000
:
2019 case bfd_arch_powerpc
:
2021 *magicp
= U802TOCMAGIC
;
2026 default: /* Unknown architecture */
2027 /* return false; -- fall through to "return false" below, to avoid
2028 "statement never reached" errors on the one below. */
2037 coff_set_arch_mach (abfd
, arch
, machine
)
2039 enum bfd_architecture arch
;
2040 unsigned long machine
;
2043 unsigned short dummy2
;
2045 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
2048 if (arch
!= bfd_arch_unknown
&&
2049 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
2050 return false; /* We can't represent this type */
2052 return true; /* We're easy ... */
2056 /* Calculate the file position for each section. */
2059 coff_compute_section_file_positions (abfd
)
2063 asection
*previous
= (asection
*) NULL
;
2064 file_ptr sofar
= FILHSZ
;
2072 /* On XCOFF, if we have symbols, set up the .debug section. */
2073 if (bfd_get_symcount (abfd
) > 0)
2076 bfd_size_type i
, symcount
;
2080 symcount
= bfd_get_symcount (abfd
);
2081 for (symp
= abfd
->outsymbols
, i
= 0; i
< symcount
; symp
++, i
++)
2083 coff_symbol_type
*cf
;
2085 cf
= coff_symbol_from (abfd
, *symp
);
2087 && cf
->native
!= NULL
2088 && SYMNAME_IN_DEBUG (&cf
->native
->u
.syment
))
2092 len
= strlen (bfd_asymbol_name (*symp
));
2101 dsec
= bfd_make_section_old_way (abfd
, ".debug");
2104 dsec
->_raw_size
= sz
;
2105 dsec
->flags
|= SEC_HAS_CONTENTS
;
2110 #ifdef COFF_IMAGE_WITH_PE
2112 if (coff_data (abfd
)->link_info
)
2114 page_size
= pe_data (abfd
)->pe_opthdr
.FileAlignment
;
2117 page_size
= PE_DEF_FILE_ALIGNMENT
;
2119 #ifdef COFF_PAGE_SIZE
2120 int page_size
= COFF_PAGE_SIZE
;
2124 if (bfd_get_start_address (abfd
))
2126 /* A start address may have been added to the original file. In this
2127 case it will need an optional header to record it. */
2128 abfd
->flags
|= EXEC_P
;
2131 if (abfd
->flags
& EXEC_P
)
2134 else if (xcoff_data (abfd
)->full_aouthdr
)
2137 sofar
+= SMALL_AOUTSZ
;
2140 sofar
+= abfd
->section_count
* SCNHSZ
;
2143 /* XCOFF handles overflows in the reloc and line number count fields
2144 by allocating a new section header to hold the correct counts. */
2145 for (current
= abfd
->sections
; current
!= NULL
; current
= current
->next
)
2146 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2150 for (current
= abfd
->sections
, count
= 1;
2151 current
!= (asection
*) NULL
;
2152 current
= current
->next
, ++count
)
2154 current
->target_index
= count
;
2156 /* Only deal with sections which have contents */
2157 if (!(current
->flags
& SEC_HAS_CONTENTS
))
2160 /* Align the sections in the file to the same boundary on
2161 which they are aligned in virtual memory. I960 doesn't
2162 do this (FIXME) so we can stay in sync with Intel. 960
2163 doesn't yet page from files... */
2165 if ((abfd
->flags
& EXEC_P
) != 0)
2167 /* make sure this section is aligned on the right boundary - by
2168 padding the previous section up if necessary */
2171 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
2172 if (previous
!= (asection
*) NULL
)
2174 previous
->_raw_size
+= sofar
- old_sofar
;
2180 /* In demand paged files the low order bits of the file offset
2181 must match the low order bits of the virtual address. */
2182 #ifdef COFF_PAGE_SIZE
2183 if ((abfd
->flags
& D_PAGED
) != 0
2184 && (current
->flags
& SEC_ALLOC
) != 0)
2185 sofar
+= (current
->vma
- sofar
) % page_size
;
2187 current
->filepos
= sofar
;
2190 /* With PE we have to pad each section to be a multiple of its
2191 page size too, and remember both sizes. */
2193 if (coff_section_data (abfd
, current
) == NULL
)
2195 current
->used_by_bfd
=
2196 (PTR
) bfd_zalloc (abfd
, sizeof (struct coff_section_tdata
));
2197 if (current
->used_by_bfd
== NULL
)
2199 /* FIXME: Return error. */
2203 if (pei_section_data (abfd
, current
) == NULL
)
2205 coff_section_data (abfd
, current
)->tdata
=
2206 (PTR
) bfd_zalloc (abfd
, sizeof (struct pei_section_tdata
));
2207 if (coff_section_data (abfd
, current
)->tdata
== NULL
)
2209 /* FIXME: Return error. */
2213 if (pei_section_data (abfd
, current
)->virt_size
== 0)
2214 pei_section_data (abfd
, current
)->virt_size
= current
->_raw_size
;
2216 current
->_raw_size
= (current
->_raw_size
+ page_size
-1) & -page_size
;
2219 sofar
+= current
->_raw_size
;
2222 /* make sure that this section is of the right size too */
2223 if ((abfd
->flags
& EXEC_P
) == 0)
2224 current
->_raw_size
= BFD_ALIGN (current
->_raw_size
,
2225 1 << current
->alignment_power
);
2229 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
2230 current
->_raw_size
+= sofar
- old_sofar
;
2235 /* Force .lib sections to start at zero. The vma is then
2236 incremented in coff_set_section_contents. This is right for
2238 if (strcmp (current
->name
, _LIB
) == 0)
2239 bfd_set_section_vma (abfd
, current
, 0);
2245 obj_relocbase (abfd
) = sofar
;
2246 abfd
->output_has_begun
= true;
2252 /* This can never work, because it is called too late--after the
2253 section positions have been set. I can't figure out what it is
2254 for, so I am going to disable it--Ian Taylor 20 March 1996. */
2256 /* If .file, .text, .data, .bss symbols are missing, add them. */
2257 /* @@ Should we only be adding missing symbols, or overriding the aux
2258 values for existing section symbols? */
2260 coff_add_missing_symbols (abfd
)
2263 unsigned int nsyms
= bfd_get_symcount (abfd
);
2264 asymbol
**sympp
= abfd
->outsymbols
;
2267 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
2269 for (i
= 0; i
< nsyms
; i
++)
2271 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
2275 /* only do this if there is a coff representation of the input
2277 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
2282 name
= csym
->symbol
.name
;
2285 if (!strcmp (name
, _TEXT
))
2288 else if (!strcmp (name
, ".wtext"))
2291 else if (!strcmp (name
, _DATA
))
2293 else if (!strcmp (name
, _BSS
))
2297 /* Now i == bfd_get_symcount (abfd). */
2298 /* @@ For now, don't deal with .file symbol. */
2301 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
2303 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
2304 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
2307 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
2310 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
2314 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
2316 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
2318 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
2319 BFD_ASSERT (i
== nsyms
);
2320 bfd_set_symtab (abfd
, sympp2
, nsyms
);
2329 coff_write_object_contents (abfd
)
2333 boolean hasrelocs
= false;
2334 boolean haslinno
= false;
2336 file_ptr reloc_base
;
2337 file_ptr lineno_base
;
2339 unsigned long reloc_size
= 0;
2340 unsigned long lnno_size
= 0;
2341 boolean long_section_names
;
2342 asection
*text_sec
= NULL
;
2343 asection
*data_sec
= NULL
;
2344 asection
*bss_sec
= NULL
;
2345 struct internal_filehdr internal_f
;
2346 struct internal_aouthdr internal_a
;
2347 #ifdef COFF_LONG_SECTION_NAMES
2348 size_t string_size
= STRING_SIZE_SIZE
;
2351 bfd_set_error (bfd_error_system_call
);
2353 /* Make a pass through the symbol table to count line number entries and
2354 put them into the correct asections */
2356 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
2358 if (abfd
->output_has_begun
== false)
2359 coff_compute_section_file_positions (abfd
);
2361 reloc_base
= obj_relocbase (abfd
);
2363 /* Work out the size of the reloc and linno areas */
2365 for (current
= abfd
->sections
; current
!= NULL
; current
=
2367 reloc_size
+= current
->reloc_count
* RELSZ
;
2369 lineno_base
= reloc_base
+ reloc_size
;
2370 sym_base
= lineno_base
+ lnno_size
;
2372 /* Indicate in each section->line_filepos its actual file address */
2373 for (current
= abfd
->sections
; current
!= NULL
; current
=
2376 if (current
->lineno_count
)
2378 current
->line_filepos
= lineno_base
;
2379 current
->moving_line_filepos
= lineno_base
;
2380 lineno_base
+= current
->lineno_count
* LINESZ
;
2384 current
->line_filepos
= 0;
2386 if (current
->reloc_count
)
2388 current
->rel_filepos
= reloc_base
;
2389 reloc_base
+= current
->reloc_count
* RELSZ
;
2393 current
->rel_filepos
= 0;
2397 /* Write section headers to the file. */
2398 internal_f
.f_nscns
= 0;
2400 if ((abfd
->flags
& EXEC_P
) != 0)
2401 scn_base
= FILHSZ
+ AOUTSZ
;
2406 if (xcoff_data (abfd
)->full_aouthdr
)
2409 scn_base
+= SMALL_AOUTSZ
;
2413 if (bfd_seek (abfd
, scn_base
, SEEK_SET
) != 0)
2416 long_section_names
= false;
2417 for (current
= abfd
->sections
;
2419 current
= current
->next
)
2421 struct internal_scnhdr section
;
2424 /* If we've got a .reloc section, remember. */
2426 #ifdef COFF_IMAGE_WITH_PE
2427 if (strcmp (current
->name
, ".reloc") == 0)
2429 pe_data (abfd
)->has_reloc_section
= 1;
2434 internal_f
.f_nscns
++;
2436 strncpy (section
.s_name
, current
->name
, SCNNMLEN
);
2438 #ifdef COFF_LONG_SECTION_NAMES
2439 /* Handle long section names as in PE. This must be compatible
2440 with the code in coff_write_symbols. */
2444 len
= strlen (current
->name
);
2447 memset (section
.s_name
, 0, SCNNMLEN
);
2448 sprintf (section
.s_name
, "/%lu", (unsigned long) string_size
);
2449 string_size
+= len
+ 1;
2450 long_section_names
= true;
2456 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2457 Ian Taylor <ian@cygnus.com>. */
2458 if (strcmp (current
->name
, _LIB
) == 0)
2459 section
.s_vaddr
= 0;
2462 section
.s_vaddr
= current
->vma
;
2463 section
.s_paddr
= current
->lma
;
2464 section
.s_size
= current
->_raw_size
;
2467 /* Reminder: s_paddr holds the virtual size of the section. */
2468 if (coff_section_data (abfd
, current
) != NULL
2469 && pei_section_data (abfd
, current
) != NULL
)
2470 section
.s_paddr
= pei_section_data (abfd
, current
)->virt_size
;
2472 section
.s_paddr
= 0;
2476 If this section has no size or is unloadable then the scnptr
2479 if (current
->_raw_size
== 0 ||
2480 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2482 section
.s_scnptr
= 0;
2486 section
.s_scnptr
= current
->filepos
;
2488 section
.s_relptr
= current
->rel_filepos
;
2489 section
.s_lnnoptr
= current
->line_filepos
;
2490 section
.s_nreloc
= current
->reloc_count
;
2491 section
.s_nlnno
= current
->lineno_count
;
2492 if (current
->reloc_count
!= 0)
2494 if (current
->lineno_count
!= 0)
2498 /* Indicate the use of an XCOFF overflow section header. */
2499 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2501 section
.s_nreloc
= 0xffff;
2502 section
.s_nlnno
= 0xffff;
2506 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
2508 if (!strcmp (current
->name
, _TEXT
))
2512 else if (!strcmp (current
->name
, _DATA
))
2516 else if (!strcmp (current
->name
, _BSS
))
2522 section
.s_align
= (current
->alignment_power
2523 ? 1 << current
->alignment_power
2528 #ifdef COFF_IMAGE_WITH_PE
2529 /* suppress output of the sections if they are null. ld includes
2530 the bss and data sections even if there is no size assigned
2531 to them. NT loader doesn't like it if these section headers are
2532 included if the sections themselves are not needed */
2533 if (section
.s_size
== 0)
2534 internal_f
.f_nscns
--;
2539 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
2540 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2545 /* PE stores COMDAT section information in the symbol table. If
2546 this section is supposed to have some COMDAT info, track down
2547 the symbol in the symbol table and modify it. */
2548 if ((current
->flags
& SEC_LINK_ONCE
) != 0)
2550 unsigned int i
, count
;
2552 coff_symbol_type
*csym
;
2554 count
= bfd_get_symcount (abfd
);
2555 for (i
= 0, psym
= abfd
->outsymbols
; i
< count
; i
++, psym
++)
2557 /* Here *PSYM is the section symbol for CURRENT. */
2559 if (strcmp ((*psym
)->name
, current
->name
) == 0)
2561 csym
= coff_symbol_from (abfd
, *psym
);
2563 || csym
->native
== NULL
2564 || csym
->native
->u
.syment
.n_numaux
< 1
2565 || csym
->native
->u
.syment
.n_sclass
!= C_STAT
2566 || csym
->native
->u
.syment
.n_type
!= T_NULL
)
2573 Note that we might not if we're converting the file from
2574 some other object file format. */
2577 combined_entry_type
*aux
;
2579 /* We don't touch the x_checksum field. The
2580 x_associated field is not currently supported. */
2582 aux
= csym
->native
+ 1;
2583 switch (current
->flags
& SEC_LINK_DUPLICATES
)
2585 case SEC_LINK_DUPLICATES_DISCARD
:
2586 aux
->u
.auxent
.x_scn
.x_comdat
= IMAGE_COMDAT_SELECT_ANY
;
2589 case SEC_LINK_DUPLICATES_ONE_ONLY
:
2590 aux
->u
.auxent
.x_scn
.x_comdat
=
2591 IMAGE_COMDAT_SELECT_NODUPLICATES
;
2594 case SEC_LINK_DUPLICATES_SAME_SIZE
:
2595 aux
->u
.auxent
.x_scn
.x_comdat
=
2596 IMAGE_COMDAT_SELECT_SAME_SIZE
;
2599 case SEC_LINK_DUPLICATES_SAME_CONTENTS
:
2600 aux
->u
.auxent
.x_scn
.x_comdat
=
2601 IMAGE_COMDAT_SELECT_EXACT_MATCH
;
2606 #endif /* COFF_WITH_PE */
2610 /* XCOFF handles overflows in the reloc and line number count fields
2611 by creating a new section header to hold the correct values. */
2612 for (current
= abfd
->sections
; current
!= NULL
; current
= current
->next
)
2614 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2616 struct internal_scnhdr scnhdr
;
2619 internal_f
.f_nscns
++;
2620 strncpy (&(scnhdr
.s_name
[0]), current
->name
, 8);
2621 scnhdr
.s_paddr
= current
->reloc_count
;
2622 scnhdr
.s_vaddr
= current
->lineno_count
;
2624 scnhdr
.s_scnptr
= 0;
2625 scnhdr
.s_relptr
= current
->rel_filepos
;
2626 scnhdr
.s_lnnoptr
= current
->line_filepos
;
2627 scnhdr
.s_nreloc
= current
->target_index
;
2628 scnhdr
.s_nlnno
= current
->target_index
;
2629 scnhdr
.s_flags
= STYP_OVRFLO
;
2630 if (coff_swap_scnhdr_out (abfd
, &scnhdr
, &buff
) == 0
2631 || bfd_write ((PTR
) &buff
, 1, SCNHSZ
, abfd
) != SCNHSZ
)
2637 /* OK, now set up the filehdr... */
2639 /* Don't include the internal abs section in the section count */
2642 We will NOT put a fucking timestamp in the header here. Every time you
2643 put it back, I will come in and take it out again. I'm sorry. This
2644 field does not belong here. We fill it with a 0 so it compares the
2645 same but is not a reasonable time. -- gnu@cygnus.com
2647 internal_f
.f_timdat
= 0;
2649 internal_f
.f_flags
= 0;
2651 if (abfd
->flags
& EXEC_P
)
2652 internal_f
.f_opthdr
= AOUTSZ
;
2655 internal_f
.f_opthdr
= 0;
2657 if (xcoff_data (abfd
)->full_aouthdr
)
2658 internal_f
.f_opthdr
= AOUTSZ
;
2660 internal_f
.f_opthdr
= SMALL_AOUTSZ
;
2665 internal_f
.f_flags
|= F_RELFLG
;
2667 internal_f
.f_flags
|= F_LNNO
;
2668 if (abfd
->flags
& EXEC_P
)
2669 internal_f
.f_flags
|= F_EXEC
;
2671 /* FIXME: this is wrong for PPC_PE! */
2672 if (bfd_little_endian (abfd
))
2673 internal_f
.f_flags
|= F_AR32WR
;
2675 internal_f
.f_flags
|= F_AR32W
;
2678 FIXME, should do something about the other byte orders and
2683 if ((abfd
->flags
& DYNAMIC
) != 0)
2684 internal_f
.f_flags
|= F_SHROBJ
;
2685 if (bfd_get_section_by_name (abfd
, _LOADER
) != NULL
)
2686 internal_f
.f_flags
|= F_DYNLOAD
;
2689 memset (&internal_a
, 0, sizeof internal_a
);
2691 /* Set up architecture-dependent stuff */
2694 unsigned int magic
= 0;
2695 unsigned short flags
= 0;
2696 coff_set_flags (abfd
, &magic
, &flags
);
2697 internal_f
.f_magic
= magic
;
2698 internal_f
.f_flags
|= flags
;
2699 /* ...and the "opt"hdr... */
2702 #ifdef ULTRA3 /* NYU's machine */
2703 /* FIXME: This is a bogus check. I really want to see if there
2704 * is a .shbss or a .shdata section, if so then set the magic
2705 * number to indicate a shared data executable.
2707 if (internal_f
.f_nscns
>= 7)
2708 internal_a
.magic
= SHMAGIC
; /* Shared magic */
2711 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
2712 #define __A_MAGIC_SET__
2715 /* FIXME: What are the a.out magic numbers for the i860? */
2716 internal_a
.magic
= 0;
2717 #define __A_MAGIC_SET__
2720 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
2721 #define __A_MAGIC_SET__
2724 #define __A_MAGIC_SET__
2725 internal_a
.magic
= PAGEMAGICBCS
;
2729 #define __A_MAGIC_SET__
2730 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2733 #if defined(M68) || defined(WE32K) || defined(M68K)
2734 #define __A_MAGIC_SET__
2736 internal_a
.magic
= LYNXCOFFMAGIC
;
2738 #if defined(TARG_AUX)
2739 internal_a
.magic
= (abfd
->flags
& D_PAGED
? PAGEMAGICPEXECPAGED
:
2740 abfd
->flags
& WP_TEXT
? PAGEMAGICPEXECSWAPPED
:
2741 PAGEMAGICEXECSWAPPED
);
2743 #if defined (PAGEMAGICPEXECPAGED)
2744 internal_a
.magic
= PAGEMAGICPEXECPAGED
;
2746 #endif /* TARG_AUX */
2748 #endif /* M68 || WE32K || M68K */
2751 #define __A_MAGIC_SET__
2752 internal_a
.magic
= ZMAGIC
;
2755 #define __A_MAGIC_SET__
2756 internal_a
.magic
= IMAGE_NT_OPTIONAL_HDR_MAGIC
;
2759 #define __A_MAGIC_SET__
2761 internal_a
.magic
= LYNXCOFFMAGIC
;
2763 internal_a
.magic
= ZMAGIC
;
2768 #define __A_MAGIC_SET__
2770 internal_a
.magic
= LYNXCOFFMAGIC
;
2775 #define __A_MAGIC_SET__
2776 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2777 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2778 RS6K_AOUTHDR_OMAGIC
;
2781 #ifndef __A_MAGIC_SET__
2782 #include "Your aouthdr magic number is not being set!"
2784 #undef __A_MAGIC_SET__
2788 /* FIXME: Does anybody ever set this to another value? */
2789 internal_a
.vstamp
= 0;
2791 /* Now should write relocs, strings, syms */
2792 obj_sym_filepos (abfd
) = sym_base
;
2794 if (bfd_get_symcount (abfd
) != 0)
2798 if (!coff_add_missing_symbols (abfd
))
2801 if (!coff_renumber_symbols (abfd
, &firstundef
))
2803 coff_mangle_symbols (abfd
);
2804 if (! coff_write_symbols (abfd
))
2806 if (! coff_write_linenumbers (abfd
))
2808 if (! coff_write_relocs (abfd
, firstundef
))
2811 #ifdef COFF_IMAGE_WITH_PE
2813 else if ((abfd
->flags
& EXEC_P
) != 0)
2817 /* PowerPC PE appears to require that all executable files be
2818 rounded up to the page size. */
2821 BFD_ALIGN (sym_base
, COFF_PAGE_SIZE
) - 1,
2823 || bfd_write (&b
, 1, 1, abfd
) != 1)
2829 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2830 backend linker, and obj_raw_syment_count is not valid until after
2831 coff_write_symbols is called. */
2832 if (obj_raw_syment_count (abfd
) != 0)
2834 internal_f
.f_symptr
= sym_base
;
2836 /* AIX appears to require that F_RELFLG not be set if there are
2837 local symbols but no relocations. */
2838 internal_f
.f_flags
&=~ F_RELFLG
;
2843 if (long_section_names
)
2844 internal_f
.f_symptr
= sym_base
;
2846 internal_f
.f_symptr
= 0;
2847 internal_f
.f_flags
|= F_LSYMS
;
2852 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2853 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2857 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2858 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2862 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2863 if (internal_a
.bsize
&& bss_sec
->vma
< internal_a
.data_start
)
2864 internal_a
.data_start
= bss_sec
->vma
;
2867 internal_a
.entry
= bfd_get_start_address (abfd
);
2868 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2871 if (xcoff_data (abfd
)->full_aouthdr
)
2874 asection
*loader_sec
;
2876 internal_a
.vstamp
= 1;
2878 internal_a
.o_snentry
= xcoff_data (abfd
)->snentry
;
2879 if (internal_a
.o_snentry
== 0)
2880 internal_a
.entry
= (bfd_vma
) -1;
2882 if (text_sec
!= NULL
)
2884 internal_a
.o_sntext
= text_sec
->target_index
;
2885 internal_a
.o_algntext
= bfd_get_section_alignment (abfd
, text_sec
);
2889 internal_a
.o_sntext
= 0;
2890 internal_a
.o_algntext
= 0;
2892 if (data_sec
!= NULL
)
2894 internal_a
.o_sndata
= data_sec
->target_index
;
2895 internal_a
.o_algndata
= bfd_get_section_alignment (abfd
, data_sec
);
2899 internal_a
.o_sndata
= 0;
2900 internal_a
.o_algndata
= 0;
2902 loader_sec
= bfd_get_section_by_name (abfd
, ".loader");
2903 if (loader_sec
!= NULL
)
2904 internal_a
.o_snloader
= loader_sec
->target_index
;
2906 internal_a
.o_snloader
= 0;
2907 if (bss_sec
!= NULL
)
2908 internal_a
.o_snbss
= bss_sec
->target_index
;
2910 internal_a
.o_snbss
= 0;
2912 toc
= xcoff_data (abfd
)->toc
;
2913 internal_a
.o_toc
= toc
;
2914 internal_a
.o_sntoc
= xcoff_data (abfd
)->sntoc
;
2916 internal_a
.o_modtype
= xcoff_data (abfd
)->modtype
;
2917 if (xcoff_data (abfd
)->cputype
!= -1)
2918 internal_a
.o_cputype
= xcoff_data (abfd
)->cputype
;
2921 switch (bfd_get_arch (abfd
))
2923 case bfd_arch_rs6000
:
2924 internal_a
.o_cputype
= 4;
2926 case bfd_arch_powerpc
:
2927 if (bfd_get_mach (abfd
) == 0)
2928 internal_a
.o_cputype
= 3;
2930 internal_a
.o_cputype
= 1;
2936 internal_a
.o_maxstack
= xcoff_data (abfd
)->maxstack
;
2937 internal_a
.o_maxdata
= xcoff_data (abfd
)->maxdata
;
2941 /* now write them */
2942 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2946 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) buff
);
2947 if (bfd_write ((PTR
) buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2950 if (abfd
->flags
& EXEC_P
)
2952 /* Note that peicode.h fills in a PEAOUTHDR, not an AOUTHDR.
2953 include/coff/pe.h sets AOUTSZ == sizeof(PEAOUTHDR)) */
2955 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) buff
);
2956 if (bfd_write ((PTR
) buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2965 /* XCOFF seems to always write at least a small a.out header. */
2966 coff_swap_aouthdr_out (abfd
, (PTR
) &internal_a
, (PTR
) &buff
);
2967 if (xcoff_data (abfd
)->full_aouthdr
)
2970 size
= SMALL_AOUTSZ
;
2971 if (bfd_write ((PTR
) &buff
, 1, size
, abfd
) != size
)
2980 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2985 bfd_size_type count
;
2987 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
2988 coff_compute_section_file_positions (abfd
);
2992 /* The physical address field of a .lib section is used to hold the
2993 number of shared libraries in the section. This code counts the
2994 number of sections being written, and increments the lma field
2997 I have found no documentation on the contents of this section.
2998 Experimentation indicates that the section contains zero or more
2999 records, each of which has the following structure:
3001 - a (four byte) word holding the length of this record, in words,
3002 - a word that always seems to be set to "2",
3003 - the path to a shared library, null-terminated and then padded
3004 to a whole word boundary.
3006 bfd_assert calls have been added to alert if an attempt is made
3007 to write a section which doesn't follow these assumptions. The
3008 code has been tested on ISC 4.1 by me, and on SCO by Robert Lipe
3009 <robertl@arnet.com> (Thanks!).
3011 Gvran Uddeborg <gvran@uddeborg.pp.se> */
3013 if (strcmp (section
->name
, _LIB
) == 0)
3015 bfd_byte
*rec
, *recend
;
3017 rec
= (bfd_byte
*) location
;
3018 recend
= rec
+ count
;
3019 while (rec
< recend
)
3022 rec
+= bfd_get_32 (abfd
, rec
) * 4;
3025 BFD_ASSERT (rec
== recend
);
3030 /* Don't write out bss sections - one way to do this is to
3031 see if the filepos has not been set. */
3032 if (section
->filepos
== 0)
3035 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
3040 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
3046 coff_close_and_cleanup (abfd
)
3049 if (!bfd_read_p (abfd
))
3050 switch (abfd
->format
)
3053 if (!_bfd_write_archive_contents (abfd
))
3057 if (!coff_write_object_contents (abfd
))
3061 bfd_set_error (bfd_error_invalid_operation
);
3065 /* We depend on bfd_close to free all the memory on the obstack. */
3066 /* FIXME if bfd_release is not using obstacks! */
3073 buy_and_read (abfd
, where
, seek_direction
, size
)
3079 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
3082 if (bfd_seek (abfd
, where
, seek_direction
) != 0
3083 || bfd_read (area
, 1, size
, abfd
) != size
)
3086 } /* buy_and_read() */
3092 Creating the linenumber table is done by reading in the entire
3093 coff linenumber table, and creating another table for internal use.
3095 A coff linenumber table is structured so that each function
3096 is marked as having a line number of 0. Each line within the
3097 function is an offset from the first line in the function. The
3098 base of the line number information for the table is stored in
3099 the symbol associated with the function.
3101 The information is copied from the external to the internal
3102 table, and each symbol which marks a function is marked by
3105 How does this work ?
3110 coff_slurp_line_table (abfd
, asect
)
3114 LINENO
*native_lineno
;
3115 alent
*lineno_cache
;
3117 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
3119 native_lineno
= (LINENO
*) buy_and_read (abfd
,
3120 asect
->line_filepos
,
3123 asect
->lineno_count
));
3125 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
3126 if (lineno_cache
== NULL
)
3130 unsigned int counter
= 0;
3131 alent
*cache_ptr
= lineno_cache
;
3132 LINENO
*src
= native_lineno
;
3134 while (counter
< asect
->lineno_count
)
3136 struct internal_lineno dst
;
3137 coff_swap_lineno_in (abfd
, src
, &dst
);
3138 cache_ptr
->line_number
= dst
.l_lnno
;
3140 if (cache_ptr
->line_number
== 0)
3142 coff_symbol_type
*sym
=
3143 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
3144 + obj_raw_syments (abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
3145 cache_ptr
->u
.sym
= (asymbol
*) sym
;
3146 if (sym
->lineno
!= NULL
)
3148 (*_bfd_error_handler
)
3149 ("%s: warning: duplicate line number information for `%s'",
3150 bfd_get_filename (abfd
),
3151 bfd_asymbol_name (&sym
->symbol
));
3153 sym
->lineno
= cache_ptr
;
3157 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
3158 - bfd_section_vma (abfd
, asect
);
3159 } /* If no linenumber expect a symbol index */
3165 cache_ptr
->line_number
= 0;
3168 asect
->lineno
= lineno_cache
;
3169 /* FIXME, free native_lineno here, or use alloca or something. */
3174 coff_slurp_symbol_table (abfd
)
3177 combined_entry_type
*native_symbols
;
3178 coff_symbol_type
*cached_area
;
3179 unsigned int *table_ptr
;
3181 unsigned int number_of_symbols
= 0;
3183 if (obj_symbols (abfd
))
3186 /* Read in the symbol table */
3187 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
3192 /* Allocate enough room for all the symbols in cached form */
3193 cached_area
= ((coff_symbol_type
*)
3195 (obj_raw_syment_count (abfd
)
3196 * sizeof (coff_symbol_type
))));
3198 if (cached_area
== NULL
)
3200 table_ptr
= ((unsigned int *)
3202 (obj_raw_syment_count (abfd
)
3203 * sizeof (unsigned int))));
3205 if (table_ptr
== NULL
)
3209 coff_symbol_type
*dst
= cached_area
;
3210 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
3211 unsigned int this_index
= 0;
3212 while (this_index
< last_native_index
)
3214 combined_entry_type
*src
= native_symbols
+ this_index
;
3215 table_ptr
[this_index
] = number_of_symbols
;
3216 dst
->symbol
.the_bfd
= abfd
;
3218 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
3219 /* We use the native name field to point to the cached field. */
3220 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
3221 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
3222 src
->u
.syment
.n_scnum
);
3223 dst
->symbol
.flags
= 0;
3224 dst
->done_lineno
= false;
3226 switch (src
->u
.syment
.n_sclass
)
3231 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
3232 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
3233 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
3235 /* Fall through to next case */
3244 /* PE uses storage class 0x68 to denote a section symbol */
3246 /* PE uses storage class 0x67 for a weak external symbol. */
3249 if ((src
->u
.syment
.n_scnum
) == 0)
3251 if ((src
->u
.syment
.n_value
) == 0)
3253 dst
->symbol
.section
= bfd_und_section_ptr
;
3254 dst
->symbol
.value
= 0;
3258 dst
->symbol
.section
= bfd_com_section_ptr
;
3259 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3264 /* Base the value as an index from the base of the
3267 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
3268 dst
->symbol
.value
= (src
->u
.syment
.n_value
3269 - dst
->symbol
.section
->vma
);
3271 if (ISFCN ((src
->u
.syment
.n_type
)))
3273 /* A function ext does not go at the end of a
3275 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
3280 /* A C_HIDEXT symbol is not global. */
3281 if (src
->u
.syment
.n_sclass
== C_HIDEXT
)
3282 dst
->symbol
.flags
= BSF_LOCAL
;
3283 /* A symbol with a csect entry should not go at the end. */
3284 if (src
->u
.syment
.n_numaux
> 0)
3285 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
3289 if (src
->u
.syment
.n_sclass
== C_NT_WEAK
)
3290 dst
->symbol
.flags
= BSF_WEAK
;
3295 case C_STAT
: /* static */
3297 case C_LEAFSTAT
: /* static leaf procedure */
3299 case C_LABEL
: /* label */
3300 if (src
->u
.syment
.n_scnum
== -2)
3301 dst
->symbol
.flags
= BSF_DEBUGGING
;
3303 dst
->symbol
.flags
= BSF_LOCAL
;
3305 /* Base the value as an index from the base of the
3306 section, if there is one. */
3307 if (dst
->symbol
.section
)
3308 dst
->symbol
.value
= (src
->u
.syment
.n_value
3309 - dst
->symbol
.section
->vma
);
3311 dst
->symbol
.value
= src
->u
.syment
.n_value
;
3314 case C_MOS
: /* member of structure */
3315 case C_EOS
: /* end of structure */
3316 #ifdef NOTDEF /* C_AUTOARG has the same value */
3318 case C_GLBLREG
: /* A29k-specific storage class */
3321 case C_REGPARM
: /* register parameter */
3322 case C_REG
: /* register variable */
3324 case C_AUTOARG
: /* 960-specific storage class */
3326 case C_TPDEF
: /* type definition */
3328 case C_AUTO
: /* automatic variable */
3329 case C_FIELD
: /* bit field */
3330 case C_ENTAG
: /* enumeration tag */
3331 case C_MOE
: /* member of enumeration */
3332 case C_MOU
: /* member of union */
3333 case C_UNTAG
: /* union tag */
3334 dst
->symbol
.flags
= BSF_DEBUGGING
;
3335 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3338 case C_FILE
: /* file name */
3339 case C_STRTAG
: /* structure tag */
3354 dst
->symbol
.flags
= BSF_DEBUGGING
;
3355 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3359 case C_BINCL
: /* beginning of include file */
3360 case C_EINCL
: /* ending of include file */
3361 /* The value is actually a pointer into the line numbers
3362 of the file. We locate the line number entry, and
3363 set the section to the section which contains it, and
3364 the value to the index in that section. */
3368 dst
->symbol
.flags
= BSF_DEBUGGING
;
3369 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
3370 if (sec
->line_filepos
<= (file_ptr
) src
->u
.syment
.n_value
3371 && ((file_ptr
) (sec
->line_filepos
3372 + sec
->lineno_count
* LINESZ
)
3373 > (file_ptr
) src
->u
.syment
.n_value
))
3376 dst
->symbol
.value
= 0;
3379 dst
->symbol
.section
= sec
;
3380 dst
->symbol
.value
= ((src
->u
.syment
.n_value
3381 - sec
->line_filepos
)
3389 dst
->symbol
.flags
= BSF_DEBUGGING
;
3391 /* The value is actually a symbol index. Save a pointer
3392 to the symbol instead of the index. FIXME: This
3393 should use a union. */
3394 src
->u
.syment
.n_value
=
3395 (long) (native_symbols
+ src
->u
.syment
.n_value
);
3396 dst
->symbol
.value
= src
->u
.syment
.n_value
;
3401 case C_BLOCK
: /* ".bb" or ".eb" */
3402 case C_FCN
: /* ".bf" or ".ef" */
3403 case C_EFCN
: /* physical end of function */
3404 dst
->symbol
.flags
= BSF_LOCAL
;
3405 /* Base the value as an index from the base of the
3407 dst
->symbol
.value
= (src
->u
.syment
.n_value
3408 - dst
->symbol
.section
->vma
);
3412 case C_EXTDEF
: /* external definition */
3413 case C_ULABEL
: /* undefined label */
3414 case C_USTATIC
: /* undefined static */
3415 #ifndef COFF_WITH_PE
3416 /* C_LINE in regular coff is 0x68. NT has taken over this storage
3417 class to represent a section symbol */
3418 case C_LINE
: /* line # reformatted as symbol table entry */
3419 /* NT uses 0x67 for a weak symbol, not C_ALIAS. */
3420 case C_ALIAS
: /* duplicate tag */
3422 case C_HIDDEN
: /* ext symbol in dmert public lib */
3424 (*_bfd_error_handler
)
3425 ("%s: Unrecognized storage class %d for %s symbol `%s'",
3426 bfd_get_filename (abfd
), src
->u
.syment
.n_sclass
,
3427 dst
->symbol
.section
->name
, dst
->symbol
.name
);
3428 dst
->symbol
.flags
= BSF_DEBUGGING
;
3429 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3433 /* BFD_ASSERT(dst->symbol.flags != 0);*/
3437 dst
->symbol
.udata
.i
= 0;
3438 dst
->lineno
= (alent
*) NULL
;
3439 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
3441 number_of_symbols
++;
3442 } /* walk the native symtab */
3443 } /* bfdize the native symtab */
3445 obj_symbols (abfd
) = cached_area
;
3446 obj_raw_syments (abfd
) = native_symbols
;
3448 bfd_get_symcount (abfd
) = number_of_symbols
;
3449 obj_convert (abfd
) = table_ptr
;
3450 /* Slurp the line tables for each section too */
3456 coff_slurp_line_table (abfd
, p
);
3461 } /* coff_slurp_symbol_table() */
3463 /* Check whether a symbol is globally visible. This is used by the
3464 COFF backend linker code in cofflink.c, since a couple of targets
3465 have globally visible symbols which are not class C_EXT. This
3466 function need not handle the case of n_class == C_EXT. */
3468 #undef OTHER_GLOBAL_CLASS
3471 #define OTHER_GLOBAL_CLASS C_LEAFEXT
3475 #define OTHER_GLOBAL_CLASS C_SECTION
3478 #ifdef OTHER_GLOBAL_CLASS
3481 coff_sym_is_global (abfd
, syment
)
3483 struct internal_syment
*syment
;
3485 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
3490 #undef OTHER_GLOBAL_CLASS
3492 #else /* ! defined (OTHER_GLOBAL_CLASS) */
3494 /* sym_is_global should not be defined if it has nothing to do. */
3496 #define coff_sym_is_global 0
3498 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
3504 Coff relocations are easily transformed into the internal BFD form
3507 Reading a coff relocation table is done in the following stages:
3509 o Read the entire coff relocation table into memory.
3511 o Process each relocation in turn; first swap it from the
3512 external to the internal form.
3514 o Turn the symbol referenced in the relocation's symbol index
3515 into a pointer into the canonical symbol table.
3516 This table is the same as the one returned by a call to
3517 @code{bfd_canonicalize_symtab}. The back end will call that
3518 routine and save the result if a canonicalization hasn't been done.
3520 o The reloc index is turned into a pointer to a howto
3521 structure, in a back end specific way. For instance, the 386
3522 and 960 use the @code{r_type} to directly produce an index
3523 into a howto table vector; the 88k subtracts a number from the
3524 @code{r_type} field and creates an addend field.
3530 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
3532 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
3533 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
3534 coffsym = (obj_symbols (abfd) \
3535 + (cache_ptr->sym_ptr_ptr - symbols)); \
3537 coffsym = coff_symbol_from (abfd, ptr); \
3538 if (coffsym != (coff_symbol_type *) NULL \
3539 && coffsym->native->u.syment.n_scnum == 0) \
3540 cache_ptr->addend = 0; \
3541 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
3542 && ptr->section != (asection *) NULL) \
3543 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
3545 cache_ptr->addend = 0; \
3550 coff_slurp_reloc_table (abfd
, asect
, symbols
)
3555 RELOC
*native_relocs
;
3556 arelent
*reloc_cache
;
3561 if (asect
->relocation
)
3563 if (asect
->reloc_count
== 0)
3565 if (asect
->flags
& SEC_CONSTRUCTOR
)
3567 if (!coff_slurp_symbol_table (abfd
))
3570 (RELOC
*) buy_and_read (abfd
,
3574 asect
->reloc_count
));
3575 reloc_cache
= (arelent
*)
3576 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
3578 if (reloc_cache
== NULL
)
3582 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
3584 #ifdef RELOC_PROCESSING
3585 struct internal_reloc dst
;
3586 struct external_reloc
*src
;
3588 cache_ptr
= reloc_cache
+ idx
;
3589 src
= native_relocs
+ idx
;
3590 coff_swap_reloc_in (abfd
, src
, &dst
);
3592 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
3594 struct internal_reloc dst
;
3596 struct external_reloc
*src
;
3598 cache_ptr
= reloc_cache
+ idx
;
3599 src
= native_relocs
+ idx
;
3601 coff_swap_reloc_in (abfd
, src
, &dst
);
3604 cache_ptr
->address
= dst
.r_vaddr
;
3606 if (dst
.r_symndx
!= -1)
3608 /* @@ Should never be greater than count of symbols! */
3609 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
3611 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[dst
.r_symndx
];
3612 ptr
= *(cache_ptr
->sym_ptr_ptr
);
3616 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
3620 /* The symbols definitions that we have read in have been
3621 relocated as if their sections started at 0. But the offsets
3622 refering to the symbols in the raw data have not been
3623 modified, so we have to have a negative addend to compensate.
3625 Note that symbols which used to be common must be left alone */
3627 /* Calculate any reloc addend by looking at the symbol */
3628 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
3630 cache_ptr
->address
-= asect
->vma
;
3631 /* !! cache_ptr->section = (asection *) NULL;*/
3633 /* Fill in the cache_ptr->howto field from dst.r_type */
3634 RTYPE2HOWTO (cache_ptr
, &dst
);
3639 asect
->relocation
= reloc_cache
;
3643 #ifndef coff_rtype_to_howto
3646 /* Get the howto structure for a reloc. This is only used if the file
3647 including this one defines coff_relocate_section to be
3648 _bfd_coff_generic_relocate_section, so it is OK if it does not
3649 always work. It is the responsibility of the including file to
3650 make sure it is reasonable if it is needed. */
3652 static reloc_howto_type
*coff_rtype_to_howto
3653 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
3654 struct coff_link_hash_entry
*, struct internal_syment
*,
3658 static reloc_howto_type
*
3659 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
3662 struct internal_reloc
*rel
;
3663 struct coff_link_hash_entry
*h
;
3664 struct internal_syment
*sym
;
3669 RTYPE2HOWTO (&genrel
, rel
);
3670 return genrel
.howto
;
3673 #else /* ! defined (RTYPE2HOWTO) */
3675 #define coff_rtype_to_howto NULL
3677 #endif /* ! defined (RTYPE2HOWTO) */
3678 #endif /* ! defined (coff_rtype_to_howto) */
3680 /* This is stupid. This function should be a boolean predicate. */
3682 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
3688 arelent
*tblptr
= section
->relocation
;
3689 unsigned int count
= 0;
3692 if (section
->flags
& SEC_CONSTRUCTOR
)
3694 /* this section has relocs made up by us, they are not in the
3695 file, so take them out of their chain and place them into
3696 the data area provided */
3697 arelent_chain
*chain
= section
->constructor_chain
;
3698 for (count
= 0; count
< section
->reloc_count
; count
++)
3700 *relptr
++ = &chain
->relent
;
3701 chain
= chain
->next
;
3707 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
3710 tblptr
= section
->relocation
;
3712 for (; count
++ < section
->reloc_count
;)
3713 *relptr
++ = tblptr
++;
3718 return section
->reloc_count
;
3723 coff_sym_filepos (abfd
)
3726 return obj_sym_filepos (abfd
);
3730 #ifndef coff_reloc16_estimate
3731 #define coff_reloc16_estimate dummy_reloc16_estimate
3734 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
3736 asection
*input_section
;
3738 unsigned int shrink
;
3739 struct bfd_link_info
*link_info
;
3746 #ifndef coff_reloc16_extra_cases
3747 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3748 /* This works even if abort is not declared in any header file. */
3750 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
3753 struct bfd_link_info
*link_info
;
3754 struct bfd_link_order
*link_order
;
3757 unsigned int *src_ptr
;
3758 unsigned int *dst_ptr
;
3764 /* If coff_relocate_section is defined, we can use the optimized COFF
3765 backend linker. Otherwise we must continue to use the old linker. */
3766 #ifdef coff_relocate_section
3767 #ifndef coff_bfd_link_hash_table_create
3768 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3770 #ifndef coff_bfd_link_add_symbols
3771 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3773 #ifndef coff_bfd_final_link
3774 #define coff_bfd_final_link _bfd_coff_final_link
3776 #else /* ! defined (coff_relocate_section) */
3777 #define coff_relocate_section NULL
3778 #ifndef coff_bfd_link_hash_table_create
3779 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3781 #ifndef coff_bfd_link_add_symbols
3782 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3784 #define coff_bfd_final_link _bfd_generic_final_link
3785 #endif /* ! defined (coff_relocate_section) */
3786 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3788 #ifndef coff_start_final_link
3789 #define coff_start_final_link NULL
3792 #ifndef coff_adjust_symndx
3793 #define coff_adjust_symndx NULL
3796 #ifndef coff_link_add_one_symbol
3797 #define coff_link_add_one_symbol _bfd_generic_link_add_one_symbol
3800 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
3802 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
3803 coff_swap_aux_out
, coff_swap_sym_out
,
3804 coff_swap_lineno_out
, coff_swap_reloc_out
,
3805 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
3806 coff_swap_scnhdr_out
,
3807 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
3808 #ifdef COFF_LONG_FILENAMES
3813 #ifdef COFF_LONG_SECTION_NAMES
3818 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
3819 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
3820 coff_mkobject_hook
, styp_to_sec_flags
, coff_set_alignment_hook
,
3821 coff_slurp_symbol_table
, symname_in_debug_hook
, coff_pointerize_aux_hook
,
3822 coff_print_aux
, coff_reloc16_extra_cases
, coff_reloc16_estimate
,
3823 coff_sym_is_global
, coff_compute_section_file_positions
,
3824 coff_start_final_link
, coff_relocate_section
, coff_rtype_to_howto
,
3825 coff_adjust_symndx
, coff_link_add_one_symbol
3828 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3829 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3830 #define coff_get_section_contents _bfd_generic_get_section_contents
3832 #ifndef coff_bfd_copy_private_symbol_data
3833 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3836 #ifndef coff_bfd_copy_private_section_data
3837 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3840 #ifndef coff_bfd_copy_private_bfd_data
3841 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3844 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3845 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3847 #ifndef coff_bfd_print_private_bfd_data
3848 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3851 #ifndef coff_bfd_is_local_label
3852 #define coff_bfd_is_local_label bfd_generic_is_local_label
3854 #ifndef coff_read_minisymbols
3855 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3857 #ifndef coff_minisymbol_to_symbol
3858 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3861 /* The reloc lookup routine must be supplied by each individual COFF
3863 #ifndef coff_bfd_reloc_type_lookup
3864 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3867 #ifndef coff_bfd_get_relocated_section_contents
3868 #define coff_bfd_get_relocated_section_contents \
3869 bfd_generic_get_relocated_section_contents
3871 #ifndef coff_bfd_relax_section
3872 #define coff_bfd_relax_section bfd_generic_relax_section