1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 91, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 Most of this hacked by Steve Chamberlain,
30 BFD supports a number of different flavours of coff format.
31 The major differences between formats are the sizes and
32 alignments of fields in structures on disk, and the occasional
35 Coff in all its varieties is implemented with a few common
36 files and a number of implementation specific files. For
37 example, The 88k bcs coff format is implemented in the file
38 @file{coff-m88k.c}. This file @code{#include}s
39 @file{coff/m88k.h} which defines the external structure of the
40 coff format for the 88k, and @file{coff/internal.h} which
41 defines the internal structure. @file{coff-m88k.c} also
42 defines the relocations used by the 88k format
45 The Intel i960 processor version of coff is implemented in
46 @file{coff-i960.c}. This file has the same structure as
47 @file{coff-m88k.c}, except that it includes @file{coff/i960.h}
48 rather than @file{coff-m88k.h}.
51 Porting to a new version of coff
53 The recommended method is to select from the existing
54 implementations the version of coff which is most like the one
55 you want to use. For example, we'll say that i386 coff is
56 the one you select, and that your coff flavour is called foo.
57 Copy @file{i386coff.c} to @file{foocoff.c}, copy
58 @file{../include/coff/i386.h} to @file{../include/coff/foo.h},
59 and add the lines to @file{targets.c} and @file{Makefile.in}
60 so that your new back end is used. Alter the shapes of the
61 structures in @file{../include/coff/foo.h} so that they match
62 what you need. You will probably also have to add
63 @code{#ifdef}s to the code in @file{coff/internal.h} and
64 @file{coffcode.h} if your version of coff is too wild.
66 You can verify that your new BFD backend works quite simply by
67 building @file{objdump} from the @file{binutils} directory,
68 and making sure that its version of what's going on and your
69 host system's idea (assuming it has the pretty standard coff
70 dump utility, usually called @code{att-dump} or just
71 @code{dump}) are the same. Then clean up your code, and send
72 what you've done to Cygnus. Then your stuff will be in the
73 next release, and you won't have to keep integrating it.
76 How the coff backend works
81 The Coff backend is split into generic routines that are
82 applicable to any Coff target and routines that are specific
83 to a particular target. The target-specific routines are
84 further split into ones which are basically the same for all
85 Coff targets except that they use the external symbol format
86 or use different values for certain constants.
88 The generic routines are in @file{coffgen.c}. These routines
89 work for any Coff target. They use some hooks into the target
90 specific code; the hooks are in a @code{bfd_coff_backend_data}
91 structure, one of which exists for each target.
93 The essentially similar target-specific routines are in
94 @file{coffcode.h}. This header file includes executable C code.
95 The various Coff targets first include the appropriate Coff
96 header file, make any special defines that are needed, and
97 then include @file{coffcode.h}.
99 Some of the Coff targets then also have additional routines in
100 the target source file itself.
102 For example, @file{coff-i960.c} includes
103 @file{coff/internal.h} and @file{coff/i960.h}. It then
104 defines a few constants, such as @code{I960}, and includes
105 @file{coffcode.h}. Since the i960 has complex relocation
106 types, @file{coff-i960.c} also includes some code to
107 manipulate the i960 relocs. This code is not in
108 @file{coffcode.h} because it would not be used by any other
114 Each flavour of coff supported in BFD has its own header file
115 describing the external layout of the structures. There is also
116 an internal description of the coff layout, in
117 @file{coff/internal.h}. A major function of the
118 coff backend is swapping the bytes and twiddling the bits to
119 translate the external form of the structures into the normal
120 internal form. This is all performed in the
121 @code{bfd_swap}_@i{thing}_@i{direction} routines. Some
122 elements are different sizes between different versions of
123 coff; it is the duty of the coff version specific include file
124 to override the definitions of various packing routines in
125 @file{coffcode.h}. E.g., the size of line number entry in coff is
126 sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
127 @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
128 correct one. No doubt, some day someone will find a version of
129 coff which has a varying field size not catered to at the
130 moment. To port BFD, that person will have to add more @code{#defines}.
131 Three of the bit twiddling routines are exported to
132 @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
133 and @code{coff_swap_linno_in}. @code{GDB} reads the symbol
134 table on its own, but uses BFD to fix things up. More of the
135 bit twiddlers are exported for @code{gas};
136 @code{coff_swap_aux_out}, @code{coff_swap_sym_out},
137 @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
138 @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
139 @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
140 of all the symbol table and reloc drudgery itself, thereby
141 saving the internal BFD overhead, but uses BFD to swap things
142 on the way out, making cross ports much safer. Doing so also
143 allows BFD (and thus the linker) to use the same header files
144 as @code{gas}, which makes one avenue to disaster disappear.
149 The simple canonical form for symbols used by BFD is not rich
150 enough to keep all the information available in a coff symbol
151 table. The back end gets around this problem by keeping the original
152 symbol table around, "behind the scenes".
154 When a symbol table is requested (through a call to
155 @code{bfd_canonicalize_symtab}), a request gets through to
156 @code{coff_get_normalized_symtab}. This reads the symbol table from
157 the coff file and swaps all the structures inside into the
158 internal form. It also fixes up all the pointers in the table
159 (represented in the file by offsets from the first symbol in
160 the table) into physical pointers to elements in the new
161 internal table. This involves some work since the meanings of
162 fields change depending upon context: a field that is a
163 pointer to another structure in the symbol table at one moment
164 may be the size in bytes of a structure at the next. Another
165 pass is made over the table. All symbols which mark file names
166 (<<C_FILE>> symbols) are modified so that the internal
167 string points to the value in the auxent (the real filename)
168 rather than the normal text associated with the symbol
171 At this time the symbol names are moved around. Coff stores
172 all symbols less than nine characters long physically
173 within the symbol table; longer strings are kept at the end of
174 the file in the string table. This pass moves all strings
175 into memory and replaces them with pointers to the strings.
178 The symbol table is massaged once again, this time to create
179 the canonical table used by the BFD application. Each symbol
180 is inspected in turn, and a decision made (using the
181 @code{sclass} field) about the various flags to set in the
182 @code{asymbol}. @xref{Symbols}. The generated canonical table
183 shares strings with the hidden internal symbol table.
185 Any linenumbers are read from the coff file too, and attached
186 to the symbols which own the functions the linenumbers belong to.
191 Writing a symbol to a coff file which didn't come from a coff
192 file will lose any debugging information. The @code{asymbol}
193 structure remembers the BFD from which the symbol was taken, and on
194 output the back end makes sure that the same destination target as
195 source target is present.
197 When the symbols have come from a coff file then all the
198 debugging information is preserved.
200 Symbol tables are provided for writing to the back end in a
201 vector of pointers to pointers. This allows applications like
202 the linker to accumulate and output large symbol tables
203 without having to do too much byte copying.
205 This function runs through the provided symbol table and
206 patches each symbol marked as a file place holder
207 (@code{C_FILE}) to point to the next file place holder in the
208 list. It also marks each @code{offset} field in the list with
209 the offset from the first symbol of the current symbol.
211 Another function of this procedure is to turn the canonical
212 value form of BFD into the form used by coff. Internally, BFD
213 expects symbol values to be offsets from a section base; so a
214 symbol physically at 0x120, but in a section starting at
215 0x100, would have the value 0x20. Coff expects symbols to
216 contain their final value, so symbols have their values
217 changed at this point to reflect their sum with their owning
218 section. This transformation uses the
219 <<output_section>> field of the @code{asymbol}'s
220 @code{asection} @xref{Sections}.
222 o <<coff_mangle_symbols>>
224 This routine runs though the provided symbol table and uses
225 the offsets generated by the previous pass and the pointers
226 generated when the symbol table was read in to create the
227 structured hierachy required by coff. It changes each pointer
228 to a symbol into the index into the symbol table of the asymbol.
230 o <<coff_write_symbols>>
232 This routine runs through the symbol table and patches up the
233 symbols from their internal form into the coff way, calls the
234 bit twiddlers, and writes out the table to the file.
243 The hidden information for an <<asymbol>> is described in a
244 <<combined_entry_type>>:
248 .typedef struct coff_ptr_struct
251 . {* Remembers the offset from the first symbol in the file for
252 . this symbol. Generated by coff_renumber_symbols. *}
253 .unsigned int offset;
255 . {* Should the value of this symbol be renumbered. Used for
256 . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
257 .unsigned int fix_value : 1;
259 . {* Should the tag field of this symbol be renumbered.
260 . Created by coff_pointerize_aux. *}
261 .unsigned int fix_tag : 1;
263 . {* Should the endidx field of this symbol be renumbered.
264 . Created by coff_pointerize_aux. *}
265 .unsigned int fix_end : 1;
267 . {* Should the x_csect.x_scnlen field be renumbered.
268 . Created by coff_pointerize_aux. *}
269 .unsigned int fix_scnlen : 1;
271 . {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the
272 . index into the line number entries. Set by
273 . coff_slurp_symbol_table. *}
274 .unsigned int fix_line : 1;
276 . {* The container for the symbol structure as read and translated
280 . union internal_auxent auxent;
281 . struct internal_syment syment;
283 .} combined_entry_type;
286 .{* Each canonical asymbol really looks like this: *}
288 .typedef struct coff_symbol_struct
290 . {* The actual symbol which the rest of BFD works with *}
293 . {* A pointer to the hidden information for this symbol *}
294 .combined_entry_type *native;
296 . {* A pointer to the linenumber information for this symbol *}
297 .struct lineno_cache_entry *lineno;
299 . {* Have the line numbers been relocated yet ? *}
300 .boolean done_lineno;
309 #include "coffswap.h"
312 #define STRING_SIZE_SIZE (4)
314 /* void warning(); */
317 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
318 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
319 * NOTE: If you add to/change this routine, you should mirror the changes
320 * in styp_to_sec_flags().
323 sec_to_styp_flags (sec_name
, sec_flags
)
324 CONST
char *sec_name
;
329 if (!strcmp (sec_name
, _TEXT
))
331 styp_flags
= STYP_TEXT
;
333 else if (!strcmp (sec_name
, _DATA
))
335 styp_flags
= STYP_DATA
;
337 else if (!strcmp (sec_name
, _BSS
))
339 styp_flags
= STYP_BSS
;
342 else if (!strcmp (sec_name
, _COMMENT
))
344 styp_flags
= STYP_INFO
;
345 #endif /* _COMMENT */
348 else if (!strcmp (sec_name
, _LIB
))
350 styp_flags
= STYP_LIB
;
354 else if (!strcmp (sec_name
, _LIT
))
356 styp_flags
= STYP_LIT
;
359 else if (!strcmp (sec_name
, ".debug"))
362 styp_flags
= STYP_DEBUG
;
364 styp_flags
= STYP_INFO
;
367 else if (!strncmp (sec_name
, ".stab", 5))
369 styp_flags
= STYP_INFO
;
372 else if (!strcmp (sec_name
, ".edata"))
374 styp_flags
= STYP_DATA
;
378 else if (!strcmp (sec_name
, _PAD
))
380 styp_flags
= STYP_PAD
;
382 else if (!strcmp (sec_name
, _LOADER
))
384 styp_flags
= STYP_LOADER
;
387 /* Try and figure out what it should be */
388 else if (sec_flags
& SEC_CODE
)
390 styp_flags
= STYP_TEXT
;
392 else if (sec_flags
& SEC_DATA
)
394 styp_flags
= STYP_DATA
;
396 else if (sec_flags
& SEC_READONLY
)
398 #ifdef STYP_LIT /* 29k readonly text/data section */
399 styp_flags
= STYP_LIT
;
401 styp_flags
= STYP_TEXT
;
402 #endif /* STYP_LIT */
404 else if (sec_flags
& SEC_LOAD
)
406 styp_flags
= STYP_TEXT
;
408 else if (sec_flags
& SEC_ALLOC
)
410 styp_flags
= STYP_BSS
;
414 if ((sec_flags
& (SEC_NEVER_LOAD
| SEC_COFF_SHARED_LIBRARY
)) != 0)
415 styp_flags
|= STYP_NOLOAD
;
419 if (sec_flags
& SEC_LINK_ONCE
)
420 styp_flags
|= IMAGE_SCN_LNK_COMDAT
;
426 * Return a word with SEC_* flags set to represent the incoming
427 * STYP_* flags (from scnhdr.s_flags). The inverse of this
428 * function is sec_to_styp_flags().
429 * NOTE: If you add to/change this routine, you should mirror the changes
430 * in sec_to_styp_flags().
433 styp_to_sec_flags (abfd
, hdr
, name
)
438 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
439 long styp_flags
= internal_s
->s_flags
;
440 flagword sec_flags
= 0;
443 if (styp_flags
& STYP_NOLOAD
)
445 sec_flags
|= SEC_NEVER_LOAD
;
447 #endif /* STYP_NOLOAD */
449 /* For 386 COFF, at least, an unloadable text or data section is
450 actually a shared library section. */
451 if (styp_flags
& STYP_TEXT
)
453 if (sec_flags
& SEC_NEVER_LOAD
)
454 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
456 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
458 else if (styp_flags
& STYP_DATA
)
460 if (sec_flags
& SEC_NEVER_LOAD
)
461 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
463 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
465 else if (styp_flags
& STYP_BSS
)
467 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
468 if (sec_flags
& SEC_NEVER_LOAD
)
469 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
472 sec_flags
|= SEC_ALLOC
;
474 else if (styp_flags
& STYP_INFO
)
476 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
477 defined. coff_compute_section_file_positions uses
478 COFF_PAGE_SIZE to ensure that the low order bits of the
479 section VMA and the file offset match. If we don't know
480 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
481 and demand page loading of the file will fail. */
482 #ifdef COFF_PAGE_SIZE
483 sec_flags
|= SEC_DEBUGGING
;
486 else if (styp_flags
& STYP_PAD
)
490 else if (strcmp (name
, _TEXT
) == 0)
492 if (sec_flags
& SEC_NEVER_LOAD
)
493 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
495 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
497 else if (strcmp (name
, _DATA
) == 0)
499 if (sec_flags
& SEC_NEVER_LOAD
)
500 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
502 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
504 else if (strcmp (name
, _BSS
) == 0)
506 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
507 if (sec_flags
& SEC_NEVER_LOAD
)
508 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
511 sec_flags
|= SEC_ALLOC
;
513 else if (strcmp (name
, ".debug") == 0
515 || strcmp (name
, _COMMENT
) == 0
517 || strncmp (name
, ".stab", 5) == 0)
519 #ifdef COFF_PAGE_SIZE
520 sec_flags
|= SEC_DEBUGGING
;
524 else if (strcmp (name
, _LIB
) == 0)
528 else if (strcmp (name
, _LIT
) == 0)
530 sec_flags
= SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
;
535 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
538 #ifdef STYP_LIT /* A29k readonly text/data section type */
539 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
541 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
543 #endif /* STYP_LIT */
544 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
545 if (styp_flags
& STYP_OTHER_LOAD
)
547 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
549 #endif /* STYP_SDATA */
552 if (styp_flags
& IMAGE_SCN_LNK_REMOVE
)
553 sec_flags
|= SEC_EXCLUDE
;
555 if (styp_flags
& IMAGE_SCN_LNK_COMDAT
)
557 sec_flags
|= SEC_LINK_ONCE
;
559 /* Unfortunately, the PE format stores essential information in
560 the symbol table, of all places. We need to extract that
561 information now, so that objdump and the linker will know how
562 to handle the section without worrying about the symbols. We
563 can't call slurp_symtab, because the linker doesn't want the
566 if (_bfd_coff_get_external_symbols (abfd
))
568 bfd_byte
*esym
, *esymend
;
570 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
571 esymend
= esym
+ obj_raw_syment_count (abfd
) * SYMESZ
;
573 while (esym
< esymend
)
575 struct internal_syment isym
;
577 bfd_coff_swap_sym_in (abfd
, (PTR
) esym
, (PTR
) &isym
);
579 if (sizeof (internal_s
->s_name
) > SYMNMLEN
)
581 /* This case implies that the matching symbol name
582 will be in the string table. */
586 if (isym
.n_sclass
== C_STAT
587 && isym
.n_type
== T_NULL
588 && isym
.n_numaux
== 1)
590 char buf
[SYMNMLEN
+ 1];
593 symname
= _bfd_coff_internal_syment_name (abfd
, &isym
, buf
);
597 if (strcmp (name
, symname
) == 0)
599 union internal_auxent aux
;
601 /* This is the section symbol. */
603 bfd_coff_swap_aux_in (abfd
, (PTR
) (esym
+ SYMESZ
),
604 isym
.n_type
, isym
.n_sclass
,
605 0, isym
.n_numaux
, (PTR
) &aux
);
607 switch (aux
.x_scn
.x_comdat
)
609 case IMAGE_COMDAT_SELECT_NODUPLICATES
:
610 sec_flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
614 case IMAGE_COMDAT_SELECT_ANY
:
615 sec_flags
|= SEC_LINK_DUPLICATES_DISCARD
;
618 case IMAGE_COMDAT_SELECT_SAME_SIZE
:
619 sec_flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
622 case IMAGE_COMDAT_SELECT_EXACT_MATCH
:
623 sec_flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
626 case IMAGE_COMDAT_SELECT_ASSOCIATIVE
:
627 /* FIXME: This is not currently implemented. */
628 sec_flags
|= SEC_LINK_DUPLICATES_DISCARD
;
636 esym
+= (isym
.n_numaux
+ 1) * SYMESZ
;
645 #define get_index(symbol) ((symbol)->udata.i)
649 bfd_coff_backend_data
653 Special entry points for gdb to swap in coff symbol table parts:
656 . void (*_bfd_coff_swap_aux_in) PARAMS ((
665 . void (*_bfd_coff_swap_sym_in) PARAMS ((
670 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
676 Special entry points for gas to swap out coff parts:
678 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
687 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
692 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
697 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
702 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
707 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
712 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
718 Special entry points for generic COFF routines to call target
719 dependent COFF routines:
721 . unsigned int _bfd_filhsz;
722 . unsigned int _bfd_aoutsz;
723 . unsigned int _bfd_scnhsz;
724 . unsigned int _bfd_symesz;
725 . unsigned int _bfd_auxesz;
726 . unsigned int _bfd_relsz;
727 . unsigned int _bfd_linesz;
728 . boolean _bfd_coff_long_filenames;
729 . boolean _bfd_coff_long_section_names;
730 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
734 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
738 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
742 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
746 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
748 . PTR internal_filehdr));
749 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
751 . PTR internal_filehdr));
752 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
754 . PTR internal_filehdr,
755 . PTR internal_aouthdr));
756 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
758 . PTR internal_scnhdr,
759 . const char *name));
760 . void (*_bfd_set_alignment_hook) PARAMS ((
763 . PTR internal_scnhdr));
764 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
766 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
768 . struct internal_syment *sym));
769 . boolean (*_bfd_coff_pointerize_aux_hook) PARAMS ((
771 . combined_entry_type *table_base,
772 . combined_entry_type *symbol,
773 . unsigned int indaux,
774 . combined_entry_type *aux));
775 . boolean (*_bfd_coff_print_aux) PARAMS ((
778 . combined_entry_type *table_base,
779 . combined_entry_type *symbol,
780 . combined_entry_type *aux,
781 . unsigned int indaux));
782 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
784 . struct bfd_link_info *link_info,
785 . struct bfd_link_order *link_order,
788 . unsigned int *src_ptr,
789 . unsigned int *dst_ptr));
790 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
792 . asection *input_section,
794 . unsigned int shrink,
795 . struct bfd_link_info *link_info));
796 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
798 . struct internal_syment *));
799 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
801 . boolean (*_bfd_coff_start_final_link) PARAMS ((
803 . struct bfd_link_info *info));
804 . boolean (*_bfd_coff_relocate_section) PARAMS ((
806 . struct bfd_link_info *info,
808 . asection *input_section,
809 . bfd_byte *contents,
810 . struct internal_reloc *relocs,
811 . struct internal_syment *syms,
812 . asection **sections));
813 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
816 . struct internal_reloc *rel,
817 . struct coff_link_hash_entry *h,
818 . struct internal_syment *sym,
819 . bfd_vma *addendp));
820 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
822 . struct bfd_link_info *info,
825 . struct internal_reloc *reloc,
826 . boolean *adjustedp));
827 . boolean (*_bfd_coff_link_add_one_symbol) PARAMS ((
828 . struct bfd_link_info *info,
834 . const char *string,
837 . struct bfd_link_hash_entry **hashp));
839 .} bfd_coff_backend_data;
841 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
843 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
844 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
846 .#define bfd_coff_swap_sym_in(a,e,i) \
847 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
849 .#define bfd_coff_swap_lineno_in(a,e,i) \
850 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
852 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
853 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
855 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
856 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
858 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
859 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
861 .#define bfd_coff_swap_sym_out(abfd, i,o) \
862 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
864 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
865 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
867 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
868 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
870 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
871 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
873 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
874 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
875 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
876 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
877 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
878 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
879 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
880 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
881 .#define bfd_coff_long_section_names(abfd) \
882 . (coff_backend_info (abfd)->_bfd_coff_long_section_names)
883 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
884 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
886 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
887 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
889 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
890 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
892 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
893 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
895 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
896 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
898 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
899 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
900 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
901 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
903 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
904 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
906 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
907 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
909 .#define bfd_coff_slurp_symbol_table(abfd)\
910 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
912 .#define bfd_coff_symname_in_debug(abfd, sym)\
913 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
915 .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
916 . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
917 . (abfd, file, base, symbol, aux, indaux))
919 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
920 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
921 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
923 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
924 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
925 . (abfd, section, reloc, shrink, link_info))
927 .#define bfd_coff_sym_is_global(abfd, sym)\
928 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
931 .#define bfd_coff_compute_section_file_positions(abfd)\
932 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
935 .#define bfd_coff_start_final_link(obfd, info)\
936 . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
938 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
939 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
940 . (obfd, info, ibfd, o, con, rel, isyms, secs))
941 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
942 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
943 . (abfd, sec, rel, h, sym, addendp))
944 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
945 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
946 . (obfd, info, ibfd, sec, rel, adjustedp))
947 .#define bfd_coff_link_add_one_symbol(info,abfd,name,flags,section,value,string,cp,coll,hashp)\
948 . ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\
949 . (info, abfd, name, flags, section, value, string, cp, coll, hashp))
953 /* See whether the magic number matches. */
956 coff_bad_format_hook (abfd
, filehdr
)
960 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
962 if (BADMAG (*internal_f
))
965 /* if the optional header is NULL or not the correct size then
966 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
967 and Intel 960 readwrite headers (I960WRMAGIC) is that the
968 optional header is of a different size.
970 But the mips keeps extra stuff in it's opthdr, so dont check
974 #if defined(M88) || defined(I960)
975 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
983 initialize a section structure with information peculiar to this
984 particular implementation of coff
988 coff_new_section_hook (abfd
, section
)
992 section
->alignment_power
= COFF_DEFAULT_SECTION_ALIGNMENT_POWER
;
995 if (xcoff_data (abfd
)->text_align_power
!= 0
996 && strcmp (bfd_get_section_name (abfd
, section
), ".text") == 0)
997 section
->alignment_power
= xcoff_data (abfd
)->text_align_power
;
998 if (xcoff_data (abfd
)->data_align_power
!= 0
999 && strcmp (bfd_get_section_name (abfd
, section
), ".data") == 0)
1000 section
->alignment_power
= xcoff_data (abfd
)->data_align_power
;
1003 /* Allocate aux records for section symbols, to store size and
1006 @@ The 10 is a guess at a plausible maximum number of aux entries
1007 (but shouldn't be a constant). */
1008 coffsymbol (section
->symbol
)->native
=
1009 (combined_entry_type
*) bfd_zalloc (abfd
,
1010 sizeof (combined_entry_type
) * 10);
1012 /* The .stab section must be aligned to 2**2 at most, because
1013 otherwise there may be gaps in the section which gdb will not
1014 know how to interpret. Examining the section name is a hack, but
1015 that is also how gdb locates the section.
1016 We need to handle the .ctors and .dtors sections similarly, to
1017 avoid introducing null words in the tables. */
1018 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 2
1019 && (strncmp (section
->name
, ".stab", 5) == 0
1020 || strcmp (section
->name
, ".ctors") == 0
1021 || strcmp (section
->name
, ".dtors") == 0))
1022 section
->alignment_power
= 2;
1024 /* Similarly, the .stabstr section must be aligned to 2**0 at most. */
1025 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 0
1026 && strncmp (section
->name
, ".stabstr", 8) == 0)
1027 section
->alignment_power
= 0;
1034 /* Set the alignment of a BFD section. */
1037 coff_set_alignment_hook (abfd
, section
, scnhdr
)
1042 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
1045 for (i
= 0; i
< 32; i
++)
1046 if ((1 << i
) >= hdr
->s_align
)
1048 section
->alignment_power
= i
;
1054 /* a couple of macros to help setting the alignment power field */
1055 #define ALIGN_SET(field,x,y) \
1056 if (((field) & IMAGE_SCN_ALIGN_64BYTES) == x )\
1058 section->alignment_power = y;\
1061 #define ELIFALIGN_SET(field,x,y) \
1062 else if (( (field) & IMAGE_SCN_ALIGN_64BYTES) == x ) \
1064 section->alignment_power = y;\
1068 coff_set_alignment_hook (abfd
, section
, scnhdr
)
1073 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
1075 ALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_64BYTES
, 6)
1076 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_32BYTES
, 5)
1077 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_16BYTES
, 4)
1078 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_8BYTES
, 3)
1079 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_4BYTES
, 2)
1080 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_2BYTES
, 1)
1081 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_1BYTES
, 0)
1083 #ifdef POWERPC_LE_PE
1084 if (strcmp (section
->name
, ".idata$2") == 0)
1086 section
->alignment_power
= 0;
1088 else if (strcmp (section
->name
, ".idata$3") == 0)
1090 section
->alignment_power
= 0;
1092 else if (strcmp (section
->name
, ".idata$4") == 0)
1094 section
->alignment_power
= 2;
1096 else if (strcmp (section
->name
, ".idata$5") == 0)
1098 section
->alignment_power
= 2;
1100 else if (strcmp (section
->name
, ".idata$6") == 0)
1102 section
->alignment_power
= 1;
1104 else if (strcmp (section
->name
, ".reloc") == 0)
1106 section
->alignment_power
= 1;
1108 else if (strncmp (section
->name
, ".stab", 5) == 0)
1110 section
->alignment_power
= 2;
1114 #ifdef COFF_IMAGE_WITH_PE
1115 /* In a PE image file, the s_paddr field holds the virtual size of a
1116 section, while the s_size field holds the raw size. */
1117 if (hdr
->s_paddr
!= 0)
1119 if (coff_section_data (abfd
, section
) == NULL
)
1121 section
->used_by_bfd
=
1122 (PTR
) bfd_zalloc (abfd
, sizeof (struct coff_section_tdata
));
1123 if (section
->used_by_bfd
== NULL
)
1125 /* FIXME: Return error. */
1129 if (pei_section_data (abfd
, section
) == NULL
)
1131 coff_section_data (abfd
, section
)->tdata
=
1132 (PTR
) bfd_zalloc (abfd
, sizeof (struct pei_section_tdata
));
1133 if (coff_section_data (abfd
, section
)->tdata
== NULL
)
1135 /* FIXME: Return error. */
1139 pei_section_data (abfd
, section
)->virt_size
= hdr
->s_paddr
;
1145 #undef ELIFALIGN_SET
1147 #else /* ! COFF_WITH_PE */
1150 /* We grossly abuse this function to handle XCOFF overflow headers.
1151 When we see one, we correct the reloc and line number counts in the
1152 real header, and remove the section we just created. */
1155 coff_set_alignment_hook (abfd
, section
, scnhdr
)
1160 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
1164 if ((hdr
->s_flags
& STYP_OVRFLO
) == 0)
1167 real_sec
= coff_section_from_bfd_index (abfd
, hdr
->s_nreloc
);
1168 if (real_sec
== NULL
)
1171 real_sec
->reloc_count
= hdr
->s_paddr
;
1172 real_sec
->lineno_count
= hdr
->s_vaddr
;
1174 for (ps
= &abfd
->sections
; *ps
!= NULL
; ps
= &(*ps
)->next
)
1179 --abfd
->section_count
;
1185 #else /* ! RS6000COFF_C */
1187 #define coff_set_alignment_hook \
1188 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
1190 #endif /* ! RS6000COFF_C */
1191 #endif /* ! COFF_WITH_PE */
1194 #ifndef coff_mkobject
1196 coff_mkobject (abfd
)
1199 coff_data_type
*coff
;
1201 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*) bfd_zalloc (abfd
, sizeof (coff_data_type
));
1202 if (abfd
->tdata
.coff_obj_data
== 0)
1204 coff
= coff_data (abfd
);
1205 coff
->symbols
= (coff_symbol_type
*) NULL
;
1206 coff
->conversion_table
= (unsigned int *) NULL
;
1207 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
1208 coff
->relocbase
= 0;
1209 coff
->local_toc_sym_map
= 0;
1211 /* make_abs_section(abfd);*/
1217 /* Create the COFF backend specific information. */
1218 #ifndef coff_mkobject_hook
1220 coff_mkobject_hook (abfd
, filehdr
, aouthdr
)
1225 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1226 coff_data_type
*coff
;
1228 if (coff_mkobject (abfd
) == false)
1231 coff
= coff_data (abfd
);
1233 coff
->sym_filepos
= internal_f
->f_symptr
;
1235 /* These members communicate important constants about the symbol
1236 table to GDB's symbol-reading code. These `constants'
1237 unfortunately vary among coff implementations... */
1238 coff
->local_n_btmask
= N_BTMASK
;
1239 coff
->local_n_btshft
= N_BTSHFT
;
1240 coff
->local_n_tmask
= N_TMASK
;
1241 coff
->local_n_tshift
= N_TSHIFT
;
1242 coff
->local_symesz
= SYMESZ
;
1243 coff
->local_auxesz
= AUXESZ
;
1244 coff
->local_linesz
= LINESZ
;
1246 obj_raw_syment_count (abfd
) =
1247 obj_conv_table_size (abfd
) =
1248 internal_f
->f_nsyms
;
1251 if ((internal_f
->f_flags
& F_SHROBJ
) != 0)
1252 abfd
->flags
|= DYNAMIC
;
1253 if (aouthdr
!= NULL
&& internal_f
->f_opthdr
>= AOUTSZ
)
1255 struct internal_aouthdr
*internal_a
=
1256 (struct internal_aouthdr
*) aouthdr
;
1257 struct xcoff_tdata
*xcoff
;
1259 xcoff
= xcoff_data (abfd
);
1260 xcoff
->full_aouthdr
= true;
1261 xcoff
->toc
= internal_a
->o_toc
;
1262 xcoff
->sntoc
= internal_a
->o_sntoc
;
1263 xcoff
->snentry
= internal_a
->o_snentry
;
1264 xcoff
->text_align_power
= internal_a
->o_algntext
;
1265 xcoff
->data_align_power
= internal_a
->o_algndata
;
1266 xcoff
->modtype
= internal_a
->o_modtype
;
1267 xcoff
->cputype
= internal_a
->o_cputype
;
1268 xcoff
->maxdata
= internal_a
->o_maxdata
;
1269 xcoff
->maxstack
= internal_a
->o_maxstack
;
1277 /* Determine the machine architecture and type. FIXME: This is target
1278 dependent because the magic numbers are defined in the target
1279 dependent header files. But there is no particular need for this.
1280 If the magic numbers were moved to a separate file, this function
1281 would be target independent and would also be much more successful
1282 at linking together COFF files for different architectures. */
1285 coff_set_arch_mach_hook (abfd
, filehdr
)
1290 enum bfd_architecture arch
;
1291 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1294 switch (internal_f
->f_magic
)
1298 arch
= bfd_arch_powerpc
;
1299 machine
= 0; /* what does this mean? (krk) */
1305 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
1306 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
1307 arch
= bfd_arch_i386
;
1311 #ifdef A29K_MAGIC_BIG
1312 case A29K_MAGIC_BIG
:
1313 case A29K_MAGIC_LITTLE
:
1314 arch
= bfd_arch_a29k
;
1320 arch
= bfd_arch_arm
;
1327 #ifdef MC68KBCSMAGIC
1330 #ifdef APOLLOM68KMAGIC
1331 case APOLLOM68KMAGIC
:
1333 #ifdef LYNXCOFFMAGIC
1336 arch
= bfd_arch_m68k
;
1344 arch
= bfd_arch_m88k
;
1350 arch
= bfd_arch_z8k
;
1351 switch (internal_f
->f_flags
& F_MACHMASK
)
1354 machine
= bfd_mach_z8001
;
1357 machine
= bfd_mach_z8002
;
1366 arch
= bfd_arch_i860
;
1373 arch
= bfd_arch_i960
;
1374 switch (F_I960TYPE
& internal_f
->f_flags
)
1378 machine
= bfd_mach_i960_core
;
1381 machine
= bfd_mach_i960_kb_sb
;
1384 machine
= bfd_mach_i960_mc
;
1387 machine
= bfd_mach_i960_xa
;
1390 machine
= bfd_mach_i960_ca
;
1393 machine
= bfd_mach_i960_ka_sa
;
1396 machine
= bfd_mach_i960_jx
;
1399 machine
= bfd_mach_i960_hx
;
1413 if (xcoff_data (abfd
)->cputype
!= -1)
1414 cputype
= xcoff_data (abfd
)->cputype
& 0xff;
1417 /* We did not get a value from the a.out header. If the
1418 file has not been stripped, we may be able to get the
1419 architecture information from the first symbol, if it
1420 is a .file symbol. */
1421 if (obj_raw_syment_count (abfd
) == 0)
1425 bfd_byte buf
[SYMESZ
];
1426 struct internal_syment sym
;
1428 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1429 || bfd_read (buf
, 1, SYMESZ
, abfd
) != SYMESZ
)
1431 coff_swap_sym_in (abfd
, (PTR
) buf
, (PTR
) &sym
);
1432 if (sym
.n_sclass
== C_FILE
)
1433 cputype
= sym
.n_type
& 0xff;
1439 /* FIXME: We don't handle all cases here. */
1445 /* PowerPC Macs use the same magic numbers as RS/6000
1446 (because that's how they were bootstrapped originally),
1447 but they are always PowerPC architecture. */
1448 arch
= bfd_arch_powerpc
;
1451 arch
= bfd_arch_rs6000
;
1453 #endif /* POWERMAC */
1457 arch
= bfd_arch_powerpc
;
1460 case 2: /* 64 bit PowerPC */
1461 arch
= bfd_arch_powerpc
;
1465 arch
= bfd_arch_powerpc
;
1469 arch
= bfd_arch_rs6000
;
1479 arch
= bfd_arch_we32k
;
1486 arch
= bfd_arch_h8300
;
1487 machine
= bfd_mach_h8300
;
1488 /* !! FIXME this probably isn't the right place for this */
1489 abfd
->flags
|= BFD_IS_RELAXABLE
;
1495 arch
= bfd_arch_h8300
;
1496 machine
= bfd_mach_h8300h
;
1497 /* !! FIXME this probably isn't the right place for this */
1498 abfd
->flags
|= BFD_IS_RELAXABLE
;
1504 arch
= bfd_arch_h8300
;
1505 machine
= bfd_mach_h8300s
;
1506 /* !! FIXME this probably isn't the right place for this */
1507 abfd
->flags
|= BFD_IS_RELAXABLE
;
1511 #ifdef SH_ARCH_MAGIC_BIG
1512 case SH_ARCH_MAGIC_BIG
:
1513 case SH_ARCH_MAGIC_LITTLE
:
1521 arch
= bfd_arch_h8500
;
1528 #ifdef LYNXCOFFMAGIC
1531 arch
= bfd_arch_sparc
;
1536 #ifdef TIC80_ARCH_MAGIC
1537 case TIC80_ARCH_MAGIC
:
1538 arch
= bfd_arch_tic80
;
1542 default: /* Unreadable input file type */
1543 arch
= bfd_arch_obscure
;
1547 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1551 #ifdef SYMNAME_IN_DEBUG
1554 symname_in_debug_hook (abfd
, sym
)
1556 struct internal_syment
*sym
;
1558 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1563 #define symname_in_debug_hook \
1564 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1570 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1572 static boolean coff_pointerize_aux_hook
1573 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1574 unsigned int, combined_entry_type
*));
1578 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1580 combined_entry_type
*table_base
;
1581 combined_entry_type
*symbol
;
1582 unsigned int indaux
;
1583 combined_entry_type
*aux
;
1585 int class = symbol
->u
.syment
.n_sclass
;
1587 if ((class == C_EXT
|| class == C_HIDEXT
)
1588 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1590 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
1592 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
1593 table_base
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
1594 aux
->fix_scnlen
= 1;
1597 /* Return true to indicate that the caller should not do any
1598 further work on this auxent. */
1602 /* Return false to indicate that this auxent should be handled by
1610 /* We don't want to pointerize bal entries. */
1612 static boolean coff_pointerize_aux_hook
1613 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1614 unsigned int, combined_entry_type
*));
1618 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1620 combined_entry_type
*table_base
;
1621 combined_entry_type
*symbol
;
1622 unsigned int indaux
;
1623 combined_entry_type
*aux
;
1625 /* Return true if we don't want to pointerize this aux entry, which
1626 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1628 && (symbol
->u
.syment
.n_sclass
== C_LEAFPROC
1629 || symbol
->u
.syment
.n_sclass
== C_LEAFSTAT
1630 || symbol
->u
.syment
.n_sclass
== C_LEAFEXT
));
1635 #define coff_pointerize_aux_hook 0
1638 #endif /* ! RS6000COFF_C */
1640 /* Print an aux entry. This returns true if it has printed it. */
1642 static boolean coff_print_aux
1643 PARAMS ((bfd
*, FILE *, combined_entry_type
*, combined_entry_type
*,
1644 combined_entry_type
*, unsigned int));
1647 coff_print_aux (abfd
, file
, table_base
, symbol
, aux
, indaux
)
1650 combined_entry_type
*table_base
;
1651 combined_entry_type
*symbol
;
1652 combined_entry_type
*aux
;
1653 unsigned int indaux
;
1656 if ((symbol
->u
.syment
.n_sclass
== C_EXT
1657 || symbol
->u
.syment
.n_sclass
== C_HIDEXT
)
1658 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1660 /* This is a csect entry. */
1661 fprintf (file
, "AUX ");
1662 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) != XTY_LD
)
1664 BFD_ASSERT (! aux
->fix_scnlen
);
1665 fprintf (file
, "val %5ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1669 fprintf (file
, "indx ");
1670 if (! aux
->fix_scnlen
)
1671 fprintf (file
, "%4ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1673 fprintf (file
, "%4ld",
1674 (long) (aux
->u
.auxent
.x_csect
.x_scnlen
.p
- table_base
));
1677 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1678 aux
->u
.auxent
.x_csect
.x_parmhash
,
1679 (unsigned int) aux
->u
.auxent
.x_csect
.x_snhash
,
1680 SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
),
1681 SMTYP_ALIGN (aux
->u
.auxent
.x_csect
.x_smtyp
),
1682 (unsigned int) aux
->u
.auxent
.x_csect
.x_smclas
,
1683 aux
->u
.auxent
.x_csect
.x_stab
,
1684 (unsigned int) aux
->u
.auxent
.x_csect
.x_snstab
);
1689 /* Return false to indicate that no special action was taken. */
1697 To write relocations, the back end steps though the
1698 canonical relocation table and create an
1699 @code{internal_reloc}. The symbol index to use is removed from
1700 the @code{offset} field in the symbol table supplied. The
1701 address comes directly from the sum of the section base
1702 address and the relocation offset; the type is dug directly
1703 from the howto field. Then the @code{internal_reloc} is
1704 swapped into the shape of an @code{external_reloc} and written
1711 static int compare_arelent_ptr
PARAMS ((const PTR
, const PTR
));
1713 /* AUX's ld wants relocations to be sorted */
1715 compare_arelent_ptr (x
, y
)
1719 const arelent
**a
= (const arelent
**) x
;
1720 const arelent
**b
= (const arelent
**) y
;
1721 bfd_size_type aadr
= (*a
)->address
;
1722 bfd_size_type badr
= (*b
)->address
;
1724 return (aadr
< badr
? -1 : badr
< aadr
? 1 : 0);
1727 #endif /* TARG_AUX */
1730 coff_write_relocs (abfd
, first_undef
)
1736 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1739 struct external_reloc dst
;
1745 /* sort relocations before we write them out */
1746 p
= (arelent
**) bfd_malloc (s
->reloc_count
* sizeof (arelent
*));
1747 if (p
== NULL
&& s
->reloc_count
> 0)
1749 memcpy (p
, s
->orelocation
, s
->reloc_count
* sizeof (arelent
*));
1750 qsort (p
, s
->reloc_count
, sizeof (arelent
*), compare_arelent_ptr
);
1753 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1755 for (i
= 0; i
< s
->reloc_count
; i
++)
1757 struct internal_reloc n
;
1759 memset ((PTR
) & n
, 0, sizeof (n
));
1761 /* Now we've renumbered the symbols we know where the
1762 undefined symbols live in the table. Check the reloc
1763 entries for symbols who's output bfd isn't the right one.
1764 This is because the symbol was undefined (which means
1765 that all the pointers are never made to point to the same
1766 place). This is a bad thing,'cause the symbols attached
1767 to the output bfd are indexed, so that the relocation
1768 entries know which symbol index they point to. So we
1769 have to look up the output symbol here. */
1771 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1774 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1775 asymbol
**outsyms
= abfd
->outsymbols
;
1776 for (i
= first_undef
; outsyms
[i
]; i
++)
1778 const char *intable
= outsyms
[i
]->name
;
1779 if (strcmp (intable
, sname
) == 0) {
1780 /* got a hit, so repoint the reloc */
1781 q
->sym_ptr_ptr
= outsyms
+ i
;
1787 n
.r_vaddr
= q
->address
+ s
->vma
;
1790 /* The 29k const/consth reloc pair is a real kludge. The consth
1791 part doesn't have a symbol; it has an offset. So rebuilt
1793 if (q
->howto
->type
== R_IHCONST
)
1794 n
.r_symndx
= q
->addend
;
1799 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1800 /* This is a relocation relative to the absolute symbol. */
1804 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1805 /* Take notice if the symbol reloc points to a symbol
1806 we don't have in our symbol table. What should we
1808 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1813 #ifdef SWAP_OUT_RELOC_OFFSET
1814 n
.r_offset
= q
->addend
;
1818 /* Work out reloc type from what is required */
1819 SELECT_RELOC (n
, q
->howto
);
1821 n
.r_type
= q
->howto
->type
;
1823 coff_swap_reloc_out (abfd
, &n
, &dst
);
1824 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1837 /* Set flags and magic number of a coff file from architecture and machine
1838 type. Result is true if we can represent the arch&type, false if not. */
1841 coff_set_flags (abfd
, magicp
, flagsp
)
1844 unsigned short *flagsp
;
1846 switch (bfd_get_arch (abfd
))
1851 switch (bfd_get_mach (abfd
))
1853 case bfd_mach_z8001
:
1856 case bfd_mach_z8002
:
1870 *magicp
= I960ROMAGIC
;
1872 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1873 I960RWMAGIC); FIXME???
1875 switch (bfd_get_mach (abfd
))
1877 case bfd_mach_i960_core
:
1880 case bfd_mach_i960_kb_sb
:
1883 case bfd_mach_i960_mc
:
1886 case bfd_mach_i960_xa
:
1889 case bfd_mach_i960_ca
:
1892 case bfd_mach_i960_ka_sa
:
1895 case bfd_mach_i960_jx
:
1898 case bfd_mach_i960_hx
:
1915 case bfd_arch_powerpc
:
1922 *magicp
= I386MAGIC
;
1924 /* Just overwrite the usual value if we're doing Lynx. */
1925 *magicp
= LYNXCOFFMAGIC
;
1932 *magicp
= I860MAGIC
;
1938 #ifdef APOLLOM68KMAGIC
1939 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1941 /* NAMES_HAVE_UNDERSCORE may be defined by coff-u68k.c. */
1942 #ifdef NAMES_HAVE_UNDERSCORE
1943 *magicp
= MC68KBCSMAGIC
;
1945 *magicp
= MC68MAGIC
;
1949 /* Just overwrite the usual value if we're doing Lynx. */
1950 *magicp
= LYNXCOFFMAGIC
;
1958 *magicp
= MC88OMAGIC
;
1963 case bfd_arch_h8300
:
1964 switch (bfd_get_mach (abfd
))
1966 case bfd_mach_h8300
:
1967 *magicp
= H8300MAGIC
;
1969 case bfd_mach_h8300h
:
1970 *magicp
= H8300HMAGIC
;
1972 case bfd_mach_h8300s
:
1973 *magicp
= H8300SMAGIC
;
1979 #ifdef SH_ARCH_MAGIC_BIG
1981 if (bfd_big_endian (abfd
))
1982 *magicp
= SH_ARCH_MAGIC_BIG
;
1984 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1990 case bfd_arch_sparc
:
1991 *magicp
= SPARCMAGIC
;
1993 /* Just overwrite the usual value if we're doing Lynx. */
1994 *magicp
= LYNXCOFFMAGIC
;
2001 case bfd_arch_h8500
:
2002 *magicp
= H8500MAGIC
;
2006 #ifdef A29K_MAGIC_BIG
2008 if (bfd_big_endian (abfd
))
2009 *magicp
= A29K_MAGIC_BIG
;
2011 *magicp
= A29K_MAGIC_LITTLE
;
2017 case bfd_arch_we32k
:
2018 *magicp
= WE32KMAGIC
;
2024 case bfd_arch_rs6000
:
2026 case bfd_arch_powerpc
:
2028 *magicp
= U802TOCMAGIC
;
2033 default: /* Unknown architecture */
2034 /* return false; -- fall through to "return false" below, to avoid
2035 "statement never reached" errors on the one below. */
2044 coff_set_arch_mach (abfd
, arch
, machine
)
2046 enum bfd_architecture arch
;
2047 unsigned long machine
;
2050 unsigned short dummy2
;
2052 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
2055 if (arch
!= bfd_arch_unknown
&&
2056 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
2057 return false; /* We can't represent this type */
2059 return true; /* We're easy ... */
2063 /* Calculate the file position for each section. */
2066 coff_compute_section_file_positions (abfd
)
2070 asection
*previous
= (asection
*) NULL
;
2071 file_ptr sofar
= FILHSZ
;
2079 /* On XCOFF, if we have symbols, set up the .debug section. */
2080 if (bfd_get_symcount (abfd
) > 0)
2083 bfd_size_type i
, symcount
;
2087 symcount
= bfd_get_symcount (abfd
);
2088 for (symp
= abfd
->outsymbols
, i
= 0; i
< symcount
; symp
++, i
++)
2090 coff_symbol_type
*cf
;
2092 cf
= coff_symbol_from (abfd
, *symp
);
2094 && cf
->native
!= NULL
2095 && SYMNAME_IN_DEBUG (&cf
->native
->u
.syment
))
2099 len
= strlen (bfd_asymbol_name (*symp
));
2108 dsec
= bfd_make_section_old_way (abfd
, ".debug");
2111 dsec
->_raw_size
= sz
;
2112 dsec
->flags
|= SEC_HAS_CONTENTS
;
2117 #ifdef COFF_IMAGE_WITH_PE
2119 if (coff_data (abfd
)->link_info
)
2121 page_size
= pe_data (abfd
)->pe_opthdr
.FileAlignment
;
2124 page_size
= PE_DEF_FILE_ALIGNMENT
;
2126 #ifdef COFF_PAGE_SIZE
2127 int page_size
= COFF_PAGE_SIZE
;
2131 if (bfd_get_start_address (abfd
))
2133 /* A start address may have been added to the original file. In this
2134 case it will need an optional header to record it. */
2135 abfd
->flags
|= EXEC_P
;
2138 if (abfd
->flags
& EXEC_P
)
2141 else if (xcoff_data (abfd
)->full_aouthdr
)
2144 sofar
+= SMALL_AOUTSZ
;
2147 sofar
+= abfd
->section_count
* SCNHSZ
;
2150 /* XCOFF handles overflows in the reloc and line number count fields
2151 by allocating a new section header to hold the correct counts. */
2152 for (current
= abfd
->sections
; current
!= NULL
; current
= current
->next
)
2153 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2157 for (current
= abfd
->sections
, count
= 1;
2158 current
!= (asection
*) NULL
;
2159 current
= current
->next
, ++count
)
2161 current
->target_index
= count
;
2163 /* Only deal with sections which have contents */
2164 if (!(current
->flags
& SEC_HAS_CONTENTS
))
2167 /* Align the sections in the file to the same boundary on
2168 which they are aligned in virtual memory. I960 doesn't
2169 do this (FIXME) so we can stay in sync with Intel. 960
2170 doesn't yet page from files... */
2172 if ((abfd
->flags
& EXEC_P
) != 0)
2174 /* make sure this section is aligned on the right boundary - by
2175 padding the previous section up if necessary */
2178 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
2179 if (previous
!= (asection
*) NULL
)
2181 previous
->_raw_size
+= sofar
- old_sofar
;
2187 /* In demand paged files the low order bits of the file offset
2188 must match the low order bits of the virtual address. */
2189 #ifdef COFF_PAGE_SIZE
2190 if ((abfd
->flags
& D_PAGED
) != 0
2191 && (current
->flags
& SEC_ALLOC
) != 0)
2192 sofar
+= (current
->vma
- sofar
) % page_size
;
2194 current
->filepos
= sofar
;
2196 #ifdef COFF_IMAGE_WITH_PE
2197 /* With PE we have to pad each section to be a multiple of its
2198 page size too, and remember both sizes. */
2200 if (coff_section_data (abfd
, current
) == NULL
)
2202 current
->used_by_bfd
=
2203 (PTR
) bfd_zalloc (abfd
, sizeof (struct coff_section_tdata
));
2204 if (current
->used_by_bfd
== NULL
)
2206 /* FIXME: Return error. */
2210 if (pei_section_data (abfd
, current
) == NULL
)
2212 coff_section_data (abfd
, current
)->tdata
=
2213 (PTR
) bfd_zalloc (abfd
, sizeof (struct pei_section_tdata
));
2214 if (coff_section_data (abfd
, current
)->tdata
== NULL
)
2216 /* FIXME: Return error. */
2220 if (pei_section_data (abfd
, current
)->virt_size
== 0)
2221 pei_section_data (abfd
, current
)->virt_size
= current
->_raw_size
;
2223 current
->_raw_size
= (current
->_raw_size
+ page_size
-1) & -page_size
;
2226 sofar
+= current
->_raw_size
;
2229 /* make sure that this section is of the right size too */
2230 if ((abfd
->flags
& EXEC_P
) == 0)
2232 bfd_size_type old_size
;
2234 old_size
= current
->_raw_size
;
2235 current
->_raw_size
= BFD_ALIGN (current
->_raw_size
,
2236 1 << current
->alignment_power
);
2237 sofar
+= current
->_raw_size
- old_size
;
2242 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
2243 current
->_raw_size
+= sofar
- old_sofar
;
2248 /* Force .lib sections to start at zero. The vma is then
2249 incremented in coff_set_section_contents. This is right for
2251 if (strcmp (current
->name
, _LIB
) == 0)
2252 bfd_set_section_vma (abfd
, current
, 0);
2258 /* Make sure the relocations are aligned. */
2259 sofar
= BFD_ALIGN (sofar
, 1 << COFF_DEFAULT_SECTION_ALIGNMENT_POWER
);
2261 obj_relocbase (abfd
) = sofar
;
2262 abfd
->output_has_begun
= true;
2268 /* This can never work, because it is called too late--after the
2269 section positions have been set. I can't figure out what it is
2270 for, so I am going to disable it--Ian Taylor 20 March 1996. */
2272 /* If .file, .text, .data, .bss symbols are missing, add them. */
2273 /* @@ Should we only be adding missing symbols, or overriding the aux
2274 values for existing section symbols? */
2276 coff_add_missing_symbols (abfd
)
2279 unsigned int nsyms
= bfd_get_symcount (abfd
);
2280 asymbol
**sympp
= abfd
->outsymbols
;
2283 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
2285 for (i
= 0; i
< nsyms
; i
++)
2287 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
2291 /* only do this if there is a coff representation of the input
2293 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
2298 name
= csym
->symbol
.name
;
2301 if (!strcmp (name
, _TEXT
))
2304 else if (!strcmp (name
, ".wtext"))
2307 else if (!strcmp (name
, _DATA
))
2309 else if (!strcmp (name
, _BSS
))
2313 /* Now i == bfd_get_symcount (abfd). */
2314 /* @@ For now, don't deal with .file symbol. */
2317 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
2319 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
2320 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
2323 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
2326 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
2330 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
2332 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
2334 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
2335 BFD_ASSERT (i
== nsyms
);
2336 bfd_set_symtab (abfd
, sympp2
, nsyms
);
2345 coff_write_object_contents (abfd
)
2349 boolean hasrelocs
= false;
2350 boolean haslinno
= false;
2352 file_ptr reloc_base
;
2353 file_ptr lineno_base
;
2355 unsigned long reloc_size
= 0;
2356 unsigned long lnno_size
= 0;
2357 boolean long_section_names
;
2358 asection
*text_sec
= NULL
;
2359 asection
*data_sec
= NULL
;
2360 asection
*bss_sec
= NULL
;
2361 struct internal_filehdr internal_f
;
2362 struct internal_aouthdr internal_a
;
2363 #ifdef COFF_LONG_SECTION_NAMES
2364 size_t string_size
= STRING_SIZE_SIZE
;
2367 bfd_set_error (bfd_error_system_call
);
2369 /* Make a pass through the symbol table to count line number entries and
2370 put them into the correct asections */
2372 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
2374 if (abfd
->output_has_begun
== false)
2375 coff_compute_section_file_positions (abfd
);
2377 reloc_base
= obj_relocbase (abfd
);
2379 /* Work out the size of the reloc and linno areas */
2381 for (current
= abfd
->sections
; current
!= NULL
; current
=
2383 reloc_size
+= current
->reloc_count
* RELSZ
;
2385 lineno_base
= reloc_base
+ reloc_size
;
2386 sym_base
= lineno_base
+ lnno_size
;
2388 /* Indicate in each section->line_filepos its actual file address */
2389 for (current
= abfd
->sections
; current
!= NULL
; current
=
2392 if (current
->lineno_count
)
2394 current
->line_filepos
= lineno_base
;
2395 current
->moving_line_filepos
= lineno_base
;
2396 lineno_base
+= current
->lineno_count
* LINESZ
;
2400 current
->line_filepos
= 0;
2402 if (current
->reloc_count
)
2404 current
->rel_filepos
= reloc_base
;
2405 reloc_base
+= current
->reloc_count
* RELSZ
;
2409 current
->rel_filepos
= 0;
2413 /* Write section headers to the file. */
2414 internal_f
.f_nscns
= 0;
2416 if ((abfd
->flags
& EXEC_P
) != 0)
2417 scn_base
= FILHSZ
+ AOUTSZ
;
2422 if (xcoff_data (abfd
)->full_aouthdr
)
2425 scn_base
+= SMALL_AOUTSZ
;
2429 if (bfd_seek (abfd
, scn_base
, SEEK_SET
) != 0)
2432 long_section_names
= false;
2433 for (current
= abfd
->sections
;
2435 current
= current
->next
)
2437 struct internal_scnhdr section
;
2440 /* If we've got a .reloc section, remember. */
2442 #ifdef COFF_IMAGE_WITH_PE
2443 if (strcmp (current
->name
, ".reloc") == 0)
2445 pe_data (abfd
)->has_reloc_section
= 1;
2450 internal_f
.f_nscns
++;
2452 strncpy (section
.s_name
, current
->name
, SCNNMLEN
);
2454 #ifdef COFF_LONG_SECTION_NAMES
2455 /* Handle long section names as in PE. This must be compatible
2456 with the code in coff_write_symbols. */
2460 len
= strlen (current
->name
);
2463 memset (section
.s_name
, 0, SCNNMLEN
);
2464 sprintf (section
.s_name
, "/%lu", (unsigned long) string_size
);
2465 string_size
+= len
+ 1;
2466 long_section_names
= true;
2472 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2473 Ian Taylor <ian@cygnus.com>. */
2474 if (strcmp (current
->name
, _LIB
) == 0)
2475 section
.s_vaddr
= 0;
2478 section
.s_vaddr
= current
->vma
;
2479 section
.s_paddr
= current
->lma
;
2480 section
.s_size
= current
->_raw_size
;
2483 section
.s_paddr
= 0;
2485 #ifdef COFF_IMAGE_WITH_PE
2486 /* Reminder: s_paddr holds the virtual size of the section. */
2487 if (coff_section_data (abfd
, current
) != NULL
2488 && pei_section_data (abfd
, current
) != NULL
)
2489 section
.s_paddr
= pei_section_data (abfd
, current
)->virt_size
;
2491 section
.s_paddr
= 0;
2495 If this section has no size or is unloadable then the scnptr
2498 if (current
->_raw_size
== 0 ||
2499 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2501 section
.s_scnptr
= 0;
2505 section
.s_scnptr
= current
->filepos
;
2507 section
.s_relptr
= current
->rel_filepos
;
2508 section
.s_lnnoptr
= current
->line_filepos
;
2509 section
.s_nreloc
= current
->reloc_count
;
2510 section
.s_nlnno
= current
->lineno_count
;
2511 if (current
->reloc_count
!= 0)
2513 if (current
->lineno_count
!= 0)
2517 /* Indicate the use of an XCOFF overflow section header. */
2518 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2520 section
.s_nreloc
= 0xffff;
2521 section
.s_nlnno
= 0xffff;
2525 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
2527 if (!strcmp (current
->name
, _TEXT
))
2531 else if (!strcmp (current
->name
, _DATA
))
2535 else if (!strcmp (current
->name
, _BSS
))
2541 section
.s_align
= (current
->alignment_power
2542 ? 1 << current
->alignment_power
2547 #ifdef COFF_IMAGE_WITH_PE
2548 /* suppress output of the sections if they are null. ld includes
2549 the bss and data sections even if there is no size assigned
2550 to them. NT loader doesn't like it if these section headers are
2551 included if the sections themselves are not needed */
2552 if (section
.s_size
== 0)
2553 internal_f
.f_nscns
--;
2558 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
2559 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2564 /* PE stores COMDAT section information in the symbol table. If
2565 this section is supposed to have some COMDAT info, track down
2566 the symbol in the symbol table and modify it. */
2567 if ((current
->flags
& SEC_LINK_ONCE
) != 0)
2569 unsigned int i
, count
;
2571 coff_symbol_type
*csym
;
2573 count
= bfd_get_symcount (abfd
);
2574 for (i
= 0, psym
= abfd
->outsymbols
; i
< count
; i
++, psym
++)
2576 /* Here *PSYM is the section symbol for CURRENT. */
2578 if (strcmp ((*psym
)->name
, current
->name
) == 0)
2580 csym
= coff_symbol_from (abfd
, *psym
);
2582 || csym
->native
== NULL
2583 || csym
->native
->u
.syment
.n_numaux
< 1
2584 || csym
->native
->u
.syment
.n_sclass
!= C_STAT
2585 || csym
->native
->u
.syment
.n_type
!= T_NULL
)
2592 Note that we might not if we're converting the file from
2593 some other object file format. */
2596 combined_entry_type
*aux
;
2598 /* We don't touch the x_checksum field. The
2599 x_associated field is not currently supported. */
2601 aux
= csym
->native
+ 1;
2602 switch (current
->flags
& SEC_LINK_DUPLICATES
)
2604 case SEC_LINK_DUPLICATES_DISCARD
:
2605 aux
->u
.auxent
.x_scn
.x_comdat
= IMAGE_COMDAT_SELECT_ANY
;
2608 case SEC_LINK_DUPLICATES_ONE_ONLY
:
2609 aux
->u
.auxent
.x_scn
.x_comdat
=
2610 IMAGE_COMDAT_SELECT_NODUPLICATES
;
2613 case SEC_LINK_DUPLICATES_SAME_SIZE
:
2614 aux
->u
.auxent
.x_scn
.x_comdat
=
2615 IMAGE_COMDAT_SELECT_SAME_SIZE
;
2618 case SEC_LINK_DUPLICATES_SAME_CONTENTS
:
2619 aux
->u
.auxent
.x_scn
.x_comdat
=
2620 IMAGE_COMDAT_SELECT_EXACT_MATCH
;
2625 #endif /* COFF_WITH_PE */
2629 /* XCOFF handles overflows in the reloc and line number count fields
2630 by creating a new section header to hold the correct values. */
2631 for (current
= abfd
->sections
; current
!= NULL
; current
= current
->next
)
2633 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2635 struct internal_scnhdr scnhdr
;
2638 internal_f
.f_nscns
++;
2639 strncpy (&(scnhdr
.s_name
[0]), current
->name
, 8);
2640 scnhdr
.s_paddr
= current
->reloc_count
;
2641 scnhdr
.s_vaddr
= current
->lineno_count
;
2643 scnhdr
.s_scnptr
= 0;
2644 scnhdr
.s_relptr
= current
->rel_filepos
;
2645 scnhdr
.s_lnnoptr
= current
->line_filepos
;
2646 scnhdr
.s_nreloc
= current
->target_index
;
2647 scnhdr
.s_nlnno
= current
->target_index
;
2648 scnhdr
.s_flags
= STYP_OVRFLO
;
2649 if (coff_swap_scnhdr_out (abfd
, &scnhdr
, &buff
) == 0
2650 || bfd_write ((PTR
) &buff
, 1, SCNHSZ
, abfd
) != SCNHSZ
)
2656 /* OK, now set up the filehdr... */
2658 /* Don't include the internal abs section in the section count */
2661 We will NOT put a fucking timestamp in the header here. Every time you
2662 put it back, I will come in and take it out again. I'm sorry. This
2663 field does not belong here. We fill it with a 0 so it compares the
2664 same but is not a reasonable time. -- gnu@cygnus.com
2666 internal_f
.f_timdat
= 0;
2668 internal_f
.f_flags
= 0;
2670 if (abfd
->flags
& EXEC_P
)
2671 internal_f
.f_opthdr
= AOUTSZ
;
2674 internal_f
.f_opthdr
= 0;
2676 if (xcoff_data (abfd
)->full_aouthdr
)
2677 internal_f
.f_opthdr
= AOUTSZ
;
2679 internal_f
.f_opthdr
= SMALL_AOUTSZ
;
2684 internal_f
.f_flags
|= F_RELFLG
;
2686 internal_f
.f_flags
|= F_LNNO
;
2687 if (abfd
->flags
& EXEC_P
)
2688 internal_f
.f_flags
|= F_EXEC
;
2690 /* FIXME: this is wrong for PPC_PE! */
2691 if (bfd_little_endian (abfd
))
2692 internal_f
.f_flags
|= F_AR32WR
;
2694 internal_f
.f_flags
|= F_AR32W
;
2697 FIXME, should do something about the other byte orders and
2702 if ((abfd
->flags
& DYNAMIC
) != 0)
2703 internal_f
.f_flags
|= F_SHROBJ
;
2704 if (bfd_get_section_by_name (abfd
, _LOADER
) != NULL
)
2705 internal_f
.f_flags
|= F_DYNLOAD
;
2708 memset (&internal_a
, 0, sizeof internal_a
);
2710 /* Set up architecture-dependent stuff */
2713 unsigned int magic
= 0;
2714 unsigned short flags
= 0;
2715 coff_set_flags (abfd
, &magic
, &flags
);
2716 internal_f
.f_magic
= magic
;
2717 internal_f
.f_flags
|= flags
;
2718 /* ...and the "opt"hdr... */
2721 #ifdef ULTRA3 /* NYU's machine */
2722 /* FIXME: This is a bogus check. I really want to see if there
2723 * is a .shbss or a .shdata section, if so then set the magic
2724 * number to indicate a shared data executable.
2726 if (internal_f
.f_nscns
>= 7)
2727 internal_a
.magic
= SHMAGIC
; /* Shared magic */
2730 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
2731 #define __A_MAGIC_SET__
2734 internal_a
.magic
= TIC80_ARCH_MAGIC
;
2735 #define __A_MAGIC_SET__
2738 /* FIXME: What are the a.out magic numbers for the i860? */
2739 internal_a
.magic
= 0;
2740 #define __A_MAGIC_SET__
2743 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
2744 #define __A_MAGIC_SET__
2747 #define __A_MAGIC_SET__
2748 internal_a
.magic
= PAGEMAGICBCS
;
2752 #define __A_MAGIC_SET__
2753 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2756 #if defined(M68) || defined(WE32K) || defined(M68K)
2757 #define __A_MAGIC_SET__
2759 internal_a
.magic
= LYNXCOFFMAGIC
;
2761 #if defined(TARG_AUX)
2762 internal_a
.magic
= (abfd
->flags
& D_PAGED
? PAGEMAGICPEXECPAGED
:
2763 abfd
->flags
& WP_TEXT
? PAGEMAGICPEXECSWAPPED
:
2764 PAGEMAGICEXECSWAPPED
);
2766 #if defined (PAGEMAGICPEXECPAGED)
2767 internal_a
.magic
= PAGEMAGICPEXECPAGED
;
2769 #endif /* TARG_AUX */
2771 #endif /* M68 || WE32K || M68K */
2774 #define __A_MAGIC_SET__
2775 internal_a
.magic
= ZMAGIC
;
2778 #define __A_MAGIC_SET__
2779 internal_a
.magic
= IMAGE_NT_OPTIONAL_HDR_MAGIC
;
2782 #define __A_MAGIC_SET__
2784 internal_a
.magic
= LYNXCOFFMAGIC
;
2786 internal_a
.magic
= ZMAGIC
;
2791 #define __A_MAGIC_SET__
2793 internal_a
.magic
= LYNXCOFFMAGIC
;
2798 #define __A_MAGIC_SET__
2799 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2800 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2801 RS6K_AOUTHDR_OMAGIC
;
2804 #ifndef __A_MAGIC_SET__
2805 #include "Your aouthdr magic number is not being set!"
2807 #undef __A_MAGIC_SET__
2811 /* FIXME: Does anybody ever set this to another value? */
2812 internal_a
.vstamp
= 0;
2814 /* Now should write relocs, strings, syms */
2815 obj_sym_filepos (abfd
) = sym_base
;
2817 if (bfd_get_symcount (abfd
) != 0)
2821 if (!coff_add_missing_symbols (abfd
))
2824 if (!coff_renumber_symbols (abfd
, &firstundef
))
2826 coff_mangle_symbols (abfd
);
2827 if (! coff_write_symbols (abfd
))
2829 if (! coff_write_linenumbers (abfd
))
2831 if (! coff_write_relocs (abfd
, firstundef
))
2834 #ifdef COFF_IMAGE_WITH_PE
2836 else if ((abfd
->flags
& EXEC_P
) != 0)
2840 /* PowerPC PE appears to require that all executable files be
2841 rounded up to the page size. */
2844 BFD_ALIGN (sym_base
, COFF_PAGE_SIZE
) - 1,
2846 || bfd_write (&b
, 1, 1, abfd
) != 1)
2852 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2853 backend linker, and obj_raw_syment_count is not valid until after
2854 coff_write_symbols is called. */
2855 if (obj_raw_syment_count (abfd
) != 0)
2857 internal_f
.f_symptr
= sym_base
;
2859 /* AIX appears to require that F_RELFLG not be set if there are
2860 local symbols but no relocations. */
2861 internal_f
.f_flags
&=~ F_RELFLG
;
2866 if (long_section_names
)
2867 internal_f
.f_symptr
= sym_base
;
2869 internal_f
.f_symptr
= 0;
2870 internal_f
.f_flags
|= F_LSYMS
;
2875 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2876 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2880 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2881 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2885 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2886 if (internal_a
.bsize
&& bss_sec
->vma
< internal_a
.data_start
)
2887 internal_a
.data_start
= bss_sec
->vma
;
2890 internal_a
.entry
= bfd_get_start_address (abfd
);
2891 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2894 if (xcoff_data (abfd
)->full_aouthdr
)
2897 asection
*loader_sec
;
2899 internal_a
.vstamp
= 1;
2901 internal_a
.o_snentry
= xcoff_data (abfd
)->snentry
;
2902 if (internal_a
.o_snentry
== 0)
2903 internal_a
.entry
= (bfd_vma
) -1;
2905 if (text_sec
!= NULL
)
2907 internal_a
.o_sntext
= text_sec
->target_index
;
2908 internal_a
.o_algntext
= bfd_get_section_alignment (abfd
, text_sec
);
2912 internal_a
.o_sntext
= 0;
2913 internal_a
.o_algntext
= 0;
2915 if (data_sec
!= NULL
)
2917 internal_a
.o_sndata
= data_sec
->target_index
;
2918 internal_a
.o_algndata
= bfd_get_section_alignment (abfd
, data_sec
);
2922 internal_a
.o_sndata
= 0;
2923 internal_a
.o_algndata
= 0;
2925 loader_sec
= bfd_get_section_by_name (abfd
, ".loader");
2926 if (loader_sec
!= NULL
)
2927 internal_a
.o_snloader
= loader_sec
->target_index
;
2929 internal_a
.o_snloader
= 0;
2930 if (bss_sec
!= NULL
)
2931 internal_a
.o_snbss
= bss_sec
->target_index
;
2933 internal_a
.o_snbss
= 0;
2935 toc
= xcoff_data (abfd
)->toc
;
2936 internal_a
.o_toc
= toc
;
2937 internal_a
.o_sntoc
= xcoff_data (abfd
)->sntoc
;
2939 internal_a
.o_modtype
= xcoff_data (abfd
)->modtype
;
2940 if (xcoff_data (abfd
)->cputype
!= -1)
2941 internal_a
.o_cputype
= xcoff_data (abfd
)->cputype
;
2944 switch (bfd_get_arch (abfd
))
2946 case bfd_arch_rs6000
:
2947 internal_a
.o_cputype
= 4;
2949 case bfd_arch_powerpc
:
2950 if (bfd_get_mach (abfd
) == 0)
2951 internal_a
.o_cputype
= 3;
2953 internal_a
.o_cputype
= 1;
2959 internal_a
.o_maxstack
= xcoff_data (abfd
)->maxstack
;
2960 internal_a
.o_maxdata
= xcoff_data (abfd
)->maxdata
;
2964 /* now write them */
2965 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2969 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) buff
);
2970 if (bfd_write ((PTR
) buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2973 if (abfd
->flags
& EXEC_P
)
2975 /* Note that peicode.h fills in a PEAOUTHDR, not an AOUTHDR.
2976 include/coff/pe.h sets AOUTSZ == sizeof(PEAOUTHDR)) */
2978 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) buff
);
2979 if (bfd_write ((PTR
) buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2988 /* XCOFF seems to always write at least a small a.out header. */
2989 coff_swap_aouthdr_out (abfd
, (PTR
) &internal_a
, (PTR
) &buff
);
2990 if (xcoff_data (abfd
)->full_aouthdr
)
2993 size
= SMALL_AOUTSZ
;
2994 if (bfd_write ((PTR
) &buff
, 1, size
, abfd
) != size
)
3003 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
3008 bfd_size_type count
;
3010 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
3011 coff_compute_section_file_positions (abfd
);
3013 #if defined(_LIB) && !defined(TARG_AUX)
3015 /* The physical address field of a .lib section is used to hold the
3016 number of shared libraries in the section. This code counts the
3017 number of sections being written, and increments the lma field
3020 I have found no documentation on the contents of this section.
3021 Experimentation indicates that the section contains zero or more
3022 records, each of which has the following structure:
3024 - a (four byte) word holding the length of this record, in words,
3025 - a word that always seems to be set to "2",
3026 - the path to a shared library, null-terminated and then padded
3027 to a whole word boundary.
3029 bfd_assert calls have been added to alert if an attempt is made
3030 to write a section which doesn't follow these assumptions. The
3031 code has been tested on ISC 4.1 by me, and on SCO by Robert Lipe
3032 <robertl@arnet.com> (Thanks!).
3034 Gvran Uddeborg <gvran@uddeborg.pp.se> */
3036 if (strcmp (section
->name
, _LIB
) == 0)
3038 bfd_byte
*rec
, *recend
;
3040 rec
= (bfd_byte
*) location
;
3041 recend
= rec
+ count
;
3042 while (rec
< recend
)
3045 rec
+= bfd_get_32 (abfd
, rec
) * 4;
3048 BFD_ASSERT (rec
== recend
);
3053 /* Don't write out bss sections - one way to do this is to
3054 see if the filepos has not been set. */
3055 if (section
->filepos
== 0)
3058 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
3063 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
3069 coff_close_and_cleanup (abfd
)
3072 if (!bfd_read_p (abfd
))
3073 switch (abfd
->format
)
3076 if (!_bfd_write_archive_contents (abfd
))
3080 if (!coff_write_object_contents (abfd
))
3084 bfd_set_error (bfd_error_invalid_operation
);
3088 /* We depend on bfd_close to free all the memory on the obstack. */
3089 /* FIXME if bfd_release is not using obstacks! */
3096 buy_and_read (abfd
, where
, seek_direction
, size
)
3102 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
3105 if (bfd_seek (abfd
, where
, seek_direction
) != 0
3106 || bfd_read (area
, 1, size
, abfd
) != size
)
3109 } /* buy_and_read() */
3115 Creating the linenumber table is done by reading in the entire
3116 coff linenumber table, and creating another table for internal use.
3118 A coff linenumber table is structured so that each function
3119 is marked as having a line number of 0. Each line within the
3120 function is an offset from the first line in the function. The
3121 base of the line number information for the table is stored in
3122 the symbol associated with the function.
3124 The information is copied from the external to the internal
3125 table, and each symbol which marks a function is marked by
3128 How does this work ?
3133 coff_slurp_line_table (abfd
, asect
)
3137 LINENO
*native_lineno
;
3138 alent
*lineno_cache
;
3140 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
3142 native_lineno
= (LINENO
*) buy_and_read (abfd
,
3143 asect
->line_filepos
,
3146 asect
->lineno_count
));
3148 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
3149 if (lineno_cache
== NULL
)
3153 unsigned int counter
= 0;
3154 alent
*cache_ptr
= lineno_cache
;
3155 LINENO
*src
= native_lineno
;
3157 while (counter
< asect
->lineno_count
)
3159 struct internal_lineno dst
;
3160 coff_swap_lineno_in (abfd
, src
, &dst
);
3161 cache_ptr
->line_number
= dst
.l_lnno
;
3163 if (cache_ptr
->line_number
== 0)
3167 coff_symbol_type
*sym
;
3170 symndx
= dst
.l_addr
.l_symndx
;
3171 if (symndx
< 0 || symndx
>= obj_raw_syment_count (abfd
))
3173 (*_bfd_error_handler
)
3174 ("%s: warning: illegal symbol index %ld in line numbers",
3175 bfd_get_filename (abfd
), dst
.l_addr
.l_symndx
);
3179 /* FIXME: We should not be casting between ints and
3180 pointers like this. */
3181 sym
= ((coff_symbol_type
*)
3182 ((symndx
+ obj_raw_syments (abfd
))
3183 ->u
.syment
._n
._n_n
._n_zeroes
));
3184 cache_ptr
->u
.sym
= (asymbol
*) sym
;
3185 if (sym
->lineno
!= NULL
&& ! warned
)
3187 (*_bfd_error_handler
)
3188 ("%s: warning: duplicate line number information for `%s'",
3189 bfd_get_filename (abfd
),
3190 bfd_asymbol_name (&sym
->symbol
));
3192 sym
->lineno
= cache_ptr
;
3196 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
3197 - bfd_section_vma (abfd
, asect
);
3198 } /* If no linenumber expect a symbol index */
3204 cache_ptr
->line_number
= 0;
3207 asect
->lineno
= lineno_cache
;
3208 /* FIXME, free native_lineno here, or use alloca or something. */
3213 coff_slurp_symbol_table (abfd
)
3216 combined_entry_type
*native_symbols
;
3217 coff_symbol_type
*cached_area
;
3218 unsigned int *table_ptr
;
3220 unsigned int number_of_symbols
= 0;
3222 if (obj_symbols (abfd
))
3225 /* Read in the symbol table */
3226 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
3231 /* Allocate enough room for all the symbols in cached form */
3232 cached_area
= ((coff_symbol_type
*)
3234 (obj_raw_syment_count (abfd
)
3235 * sizeof (coff_symbol_type
))));
3237 if (cached_area
== NULL
)
3239 table_ptr
= ((unsigned int *)
3241 (obj_raw_syment_count (abfd
)
3242 * sizeof (unsigned int))));
3244 if (table_ptr
== NULL
)
3248 coff_symbol_type
*dst
= cached_area
;
3249 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
3250 unsigned int this_index
= 0;
3251 while (this_index
< last_native_index
)
3253 combined_entry_type
*src
= native_symbols
+ this_index
;
3254 table_ptr
[this_index
] = number_of_symbols
;
3255 dst
->symbol
.the_bfd
= abfd
;
3257 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
3258 /* We use the native name field to point to the cached field. */
3259 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
3260 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
3261 src
->u
.syment
.n_scnum
);
3262 dst
->symbol
.flags
= 0;
3263 dst
->done_lineno
= false;
3265 switch (src
->u
.syment
.n_sclass
)
3270 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
3271 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
3272 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
3274 /* Fall through to next case */
3283 /* PE uses storage class 0x68 to denote a section symbol */
3285 /* PE uses storage class 0x67 for a weak external symbol. */
3288 if ((src
->u
.syment
.n_scnum
) == 0)
3290 if ((src
->u
.syment
.n_value
) == 0)
3292 dst
->symbol
.section
= bfd_und_section_ptr
;
3293 dst
->symbol
.value
= 0;
3297 dst
->symbol
.section
= bfd_com_section_ptr
;
3298 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3303 /* Base the value as an index from the base of the
3306 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
3307 dst
->symbol
.value
= (src
->u
.syment
.n_value
3308 - dst
->symbol
.section
->vma
);
3310 if (ISFCN ((src
->u
.syment
.n_type
)))
3312 /* A function ext does not go at the end of a
3314 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
3319 /* A C_HIDEXT symbol is not global. */
3320 if (src
->u
.syment
.n_sclass
== C_HIDEXT
)
3321 dst
->symbol
.flags
= BSF_LOCAL
;
3322 /* A symbol with a csect entry should not go at the end. */
3323 if (src
->u
.syment
.n_numaux
> 0)
3324 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
3328 if (src
->u
.syment
.n_sclass
== C_NT_WEAK
)
3329 dst
->symbol
.flags
= BSF_WEAK
;
3334 case C_STAT
: /* static */
3336 case C_LEAFSTAT
: /* static leaf procedure */
3338 case C_LABEL
: /* label */
3339 if (src
->u
.syment
.n_scnum
== -2)
3340 dst
->symbol
.flags
= BSF_DEBUGGING
;
3342 dst
->symbol
.flags
= BSF_LOCAL
;
3344 /* Base the value as an index from the base of the
3345 section, if there is one. */
3346 if (dst
->symbol
.section
)
3347 dst
->symbol
.value
= (src
->u
.syment
.n_value
3348 - dst
->symbol
.section
->vma
);
3350 dst
->symbol
.value
= src
->u
.syment
.n_value
;
3353 case C_MOS
: /* member of structure */
3354 case C_EOS
: /* end of structure */
3355 #ifdef NOTDEF /* C_AUTOARG has the same value */
3357 case C_GLBLREG
: /* A29k-specific storage class */
3360 case C_REGPARM
: /* register parameter */
3361 case C_REG
: /* register variable */
3363 case C_AUTOARG
: /* 960-specific storage class */
3365 case C_TPDEF
: /* type definition */
3367 case C_AUTO
: /* automatic variable */
3368 case C_FIELD
: /* bit field */
3369 case C_ENTAG
: /* enumeration tag */
3370 case C_MOE
: /* member of enumeration */
3371 case C_MOU
: /* member of union */
3372 case C_UNTAG
: /* union tag */
3373 dst
->symbol
.flags
= BSF_DEBUGGING
;
3374 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3377 case C_FILE
: /* file name */
3378 case C_STRTAG
: /* structure tag */
3393 dst
->symbol
.flags
= BSF_DEBUGGING
;
3394 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3398 case C_BINCL
: /* beginning of include file */
3399 case C_EINCL
: /* ending of include file */
3400 /* The value is actually a pointer into the line numbers
3401 of the file. We locate the line number entry, and
3402 set the section to the section which contains it, and
3403 the value to the index in that section. */
3407 dst
->symbol
.flags
= BSF_DEBUGGING
;
3408 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
3409 if (sec
->line_filepos
<= (file_ptr
) src
->u
.syment
.n_value
3410 && ((file_ptr
) (sec
->line_filepos
3411 + sec
->lineno_count
* LINESZ
)
3412 > (file_ptr
) src
->u
.syment
.n_value
))
3415 dst
->symbol
.value
= 0;
3418 dst
->symbol
.section
= sec
;
3419 dst
->symbol
.value
= ((src
->u
.syment
.n_value
3420 - sec
->line_filepos
)
3428 dst
->symbol
.flags
= BSF_DEBUGGING
;
3430 /* The value is actually a symbol index. Save a pointer
3431 to the symbol instead of the index. FIXME: This
3432 should use a union. */
3433 src
->u
.syment
.n_value
=
3434 (long) (native_symbols
+ src
->u
.syment
.n_value
);
3435 dst
->symbol
.value
= src
->u
.syment
.n_value
;
3440 case C_BLOCK
: /* ".bb" or ".eb" */
3441 case C_FCN
: /* ".bf" or ".ef" */
3442 case C_EFCN
: /* physical end of function */
3443 dst
->symbol
.flags
= BSF_LOCAL
;
3444 /* Base the value as an index from the base of the
3446 dst
->symbol
.value
= (src
->u
.syment
.n_value
3447 - dst
->symbol
.section
->vma
);
3451 case C_EXTDEF
: /* external definition */
3452 case C_ULABEL
: /* undefined label */
3453 case C_USTATIC
: /* undefined static */
3454 #ifndef COFF_WITH_PE
3455 /* C_LINE in regular coff is 0x68. NT has taken over this storage
3456 class to represent a section symbol */
3457 case C_LINE
: /* line # reformatted as symbol table entry */
3458 /* NT uses 0x67 for a weak symbol, not C_ALIAS. */
3459 case C_ALIAS
: /* duplicate tag */
3461 case C_HIDDEN
: /* ext symbol in dmert public lib */
3463 (*_bfd_error_handler
)
3464 ("%s: Unrecognized storage class %d for %s symbol `%s'",
3465 bfd_get_filename (abfd
), src
->u
.syment
.n_sclass
,
3466 dst
->symbol
.section
->name
, dst
->symbol
.name
);
3467 dst
->symbol
.flags
= BSF_DEBUGGING
;
3468 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3472 /* BFD_ASSERT(dst->symbol.flags != 0);*/
3476 dst
->symbol
.udata
.i
= 0;
3477 dst
->lineno
= (alent
*) NULL
;
3478 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
3480 number_of_symbols
++;
3481 } /* walk the native symtab */
3482 } /* bfdize the native symtab */
3484 obj_symbols (abfd
) = cached_area
;
3485 obj_raw_syments (abfd
) = native_symbols
;
3487 bfd_get_symcount (abfd
) = number_of_symbols
;
3488 obj_convert (abfd
) = table_ptr
;
3489 /* Slurp the line tables for each section too */
3495 coff_slurp_line_table (abfd
, p
);
3500 } /* coff_slurp_symbol_table() */
3502 /* Check whether a symbol is globally visible. This is used by the
3503 COFF backend linker code in cofflink.c, since a couple of targets
3504 have globally visible symbols which are not class C_EXT. This
3505 function need not handle the case of n_class == C_EXT. */
3507 #undef OTHER_GLOBAL_CLASS
3510 #define OTHER_GLOBAL_CLASS C_LEAFEXT
3514 #define OTHER_GLOBAL_CLASS C_SECTION
3517 #ifdef OTHER_GLOBAL_CLASS
3520 coff_sym_is_global (abfd
, syment
)
3522 struct internal_syment
*syment
;
3524 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
3529 #undef OTHER_GLOBAL_CLASS
3531 #else /* ! defined (OTHER_GLOBAL_CLASS) */
3533 /* sym_is_global should not be defined if it has nothing to do. */
3535 #define coff_sym_is_global 0
3537 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
3543 Coff relocations are easily transformed into the internal BFD form
3546 Reading a coff relocation table is done in the following stages:
3548 o Read the entire coff relocation table into memory.
3550 o Process each relocation in turn; first swap it from the
3551 external to the internal form.
3553 o Turn the symbol referenced in the relocation's symbol index
3554 into a pointer into the canonical symbol table.
3555 This table is the same as the one returned by a call to
3556 @code{bfd_canonicalize_symtab}. The back end will call that
3557 routine and save the result if a canonicalization hasn't been done.
3559 o The reloc index is turned into a pointer to a howto
3560 structure, in a back end specific way. For instance, the 386
3561 and 960 use the @code{r_type} to directly produce an index
3562 into a howto table vector; the 88k subtracts a number from the
3563 @code{r_type} field and creates an addend field.
3569 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
3571 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
3572 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
3573 coffsym = (obj_symbols (abfd) \
3574 + (cache_ptr->sym_ptr_ptr - symbols)); \
3576 coffsym = coff_symbol_from (abfd, ptr); \
3577 if (coffsym != (coff_symbol_type *) NULL \
3578 && coffsym->native->u.syment.n_scnum == 0) \
3579 cache_ptr->addend = 0; \
3580 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
3581 && ptr->section != (asection *) NULL) \
3582 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
3584 cache_ptr->addend = 0; \
3589 coff_slurp_reloc_table (abfd
, asect
, symbols
)
3594 RELOC
*native_relocs
;
3595 arelent
*reloc_cache
;
3600 if (asect
->relocation
)
3602 if (asect
->reloc_count
== 0)
3604 if (asect
->flags
& SEC_CONSTRUCTOR
)
3606 if (!coff_slurp_symbol_table (abfd
))
3609 (RELOC
*) buy_and_read (abfd
,
3613 asect
->reloc_count
));
3614 reloc_cache
= (arelent
*)
3615 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
3617 if (reloc_cache
== NULL
)
3621 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
3623 #ifdef RELOC_PROCESSING
3624 struct internal_reloc dst
;
3625 struct external_reloc
*src
;
3627 cache_ptr
= reloc_cache
+ idx
;
3628 src
= native_relocs
+ idx
;
3629 coff_swap_reloc_in (abfd
, src
, &dst
);
3631 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
3633 struct internal_reloc dst
;
3635 struct external_reloc
*src
;
3637 cache_ptr
= reloc_cache
+ idx
;
3638 src
= native_relocs
+ idx
;
3640 coff_swap_reloc_in (abfd
, src
, &dst
);
3643 cache_ptr
->address
= dst
.r_vaddr
;
3645 if (dst
.r_symndx
!= -1)
3647 if (dst
.r_symndx
< 0 || dst
.r_symndx
>= obj_conv_table_size (abfd
))
3649 (*_bfd_error_handler
)
3650 ("%s: warning: illegal symbol index %ld in relocs",
3651 bfd_get_filename (abfd
), dst
.r_symndx
);
3652 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
3657 cache_ptr
->sym_ptr_ptr
= (symbols
3658 + obj_convert (abfd
)[dst
.r_symndx
]);
3659 ptr
= *(cache_ptr
->sym_ptr_ptr
);
3664 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
3668 /* The symbols definitions that we have read in have been
3669 relocated as if their sections started at 0. But the offsets
3670 refering to the symbols in the raw data have not been
3671 modified, so we have to have a negative addend to compensate.
3673 Note that symbols which used to be common must be left alone */
3675 /* Calculate any reloc addend by looking at the symbol */
3676 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
3678 cache_ptr
->address
-= asect
->vma
;
3679 /* !! cache_ptr->section = (asection *) NULL;*/
3681 /* Fill in the cache_ptr->howto field from dst.r_type */
3682 RTYPE2HOWTO (cache_ptr
, &dst
);
3685 if (cache_ptr
->howto
== NULL
)
3687 (*_bfd_error_handler
)
3688 ("%s: illegal relocation type %d at address 0x%lx",
3689 bfd_get_filename (abfd
), dst
.r_type
, (long) dst
.r_vaddr
);
3690 bfd_set_error (bfd_error_bad_value
);
3695 asect
->relocation
= reloc_cache
;
3699 #ifndef coff_rtype_to_howto
3702 /* Get the howto structure for a reloc. This is only used if the file
3703 including this one defines coff_relocate_section to be
3704 _bfd_coff_generic_relocate_section, so it is OK if it does not
3705 always work. It is the responsibility of the including file to
3706 make sure it is reasonable if it is needed. */
3708 static reloc_howto_type
*coff_rtype_to_howto
3709 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
3710 struct coff_link_hash_entry
*, struct internal_syment
*,
3714 static reloc_howto_type
*
3715 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
3718 struct internal_reloc
*rel
;
3719 struct coff_link_hash_entry
*h
;
3720 struct internal_syment
*sym
;
3725 RTYPE2HOWTO (&genrel
, rel
);
3726 return genrel
.howto
;
3729 #else /* ! defined (RTYPE2HOWTO) */
3731 #define coff_rtype_to_howto NULL
3733 #endif /* ! defined (RTYPE2HOWTO) */
3734 #endif /* ! defined (coff_rtype_to_howto) */
3736 /* This is stupid. This function should be a boolean predicate. */
3738 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
3744 arelent
*tblptr
= section
->relocation
;
3745 unsigned int count
= 0;
3748 if (section
->flags
& SEC_CONSTRUCTOR
)
3750 /* this section has relocs made up by us, they are not in the
3751 file, so take them out of their chain and place them into
3752 the data area provided */
3753 arelent_chain
*chain
= section
->constructor_chain
;
3754 for (count
= 0; count
< section
->reloc_count
; count
++)
3756 *relptr
++ = &chain
->relent
;
3757 chain
= chain
->next
;
3763 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
3766 tblptr
= section
->relocation
;
3768 for (; count
++ < section
->reloc_count
;)
3769 *relptr
++ = tblptr
++;
3774 return section
->reloc_count
;
3779 coff_sym_filepos (abfd
)
3782 return obj_sym_filepos (abfd
);
3786 #ifndef coff_reloc16_estimate
3787 #define coff_reloc16_estimate dummy_reloc16_estimate
3790 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
3792 asection
*input_section
;
3794 unsigned int shrink
;
3795 struct bfd_link_info
*link_info
;
3802 #ifndef coff_reloc16_extra_cases
3803 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3804 /* This works even if abort is not declared in any header file. */
3806 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
3809 struct bfd_link_info
*link_info
;
3810 struct bfd_link_order
*link_order
;
3813 unsigned int *src_ptr
;
3814 unsigned int *dst_ptr
;
3820 /* If coff_relocate_section is defined, we can use the optimized COFF
3821 backend linker. Otherwise we must continue to use the old linker. */
3822 #ifdef coff_relocate_section
3823 #ifndef coff_bfd_link_hash_table_create
3824 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3826 #ifndef coff_bfd_link_add_symbols
3827 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3829 #ifndef coff_bfd_final_link
3830 #define coff_bfd_final_link _bfd_coff_final_link
3832 #else /* ! defined (coff_relocate_section) */
3833 #define coff_relocate_section NULL
3834 #ifndef coff_bfd_link_hash_table_create
3835 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3837 #ifndef coff_bfd_link_add_symbols
3838 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3840 #define coff_bfd_final_link _bfd_generic_final_link
3841 #endif /* ! defined (coff_relocate_section) */
3842 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3844 #ifndef coff_start_final_link
3845 #define coff_start_final_link NULL
3848 #ifndef coff_adjust_symndx
3849 #define coff_adjust_symndx NULL
3852 #ifndef coff_link_add_one_symbol
3853 #define coff_link_add_one_symbol _bfd_generic_link_add_one_symbol
3856 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
3858 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
3859 coff_swap_aux_out
, coff_swap_sym_out
,
3860 coff_swap_lineno_out
, coff_swap_reloc_out
,
3861 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
3862 coff_swap_scnhdr_out
,
3863 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
3864 #ifdef COFF_LONG_FILENAMES
3869 #ifdef COFF_LONG_SECTION_NAMES
3874 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
3875 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
3876 coff_mkobject_hook
, styp_to_sec_flags
, coff_set_alignment_hook
,
3877 coff_slurp_symbol_table
, symname_in_debug_hook
, coff_pointerize_aux_hook
,
3878 coff_print_aux
, coff_reloc16_extra_cases
, coff_reloc16_estimate
,
3879 coff_sym_is_global
, coff_compute_section_file_positions
,
3880 coff_start_final_link
, coff_relocate_section
, coff_rtype_to_howto
,
3881 coff_adjust_symndx
, coff_link_add_one_symbol
3884 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3885 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3886 #define coff_get_section_contents _bfd_generic_get_section_contents
3888 #ifndef coff_bfd_copy_private_symbol_data
3889 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3892 #ifndef coff_bfd_copy_private_section_data
3893 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3896 #ifndef coff_bfd_copy_private_bfd_data
3897 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3900 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3901 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3903 #ifndef coff_bfd_print_private_bfd_data
3904 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3907 #ifndef coff_bfd_is_local_label_name
3908 #define coff_bfd_is_local_label_name bfd_generic_is_local_label_name
3910 #ifndef coff_read_minisymbols
3911 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3913 #ifndef coff_minisymbol_to_symbol
3914 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3917 /* The reloc lookup routine must be supplied by each individual COFF
3919 #ifndef coff_bfd_reloc_type_lookup
3920 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3923 #ifndef coff_bfd_get_relocated_section_contents
3924 #define coff_bfd_get_relocated_section_contents \
3925 bfd_generic_get_relocated_section_contents
3927 #ifndef coff_bfd_relax_section
3928 #define coff_bfd_relax_section bfd_generic_relax_section