1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 Most of this hacked by Steve Chamberlain,
30 BFD supports a number of different flavours of coff format.
31 The major differences between formats are the sizes and
32 alignments of fields in structures on disk, and the occasional
35 Coff in all its varieties is implemented with a few common
36 files and a number of implementation specific files. For
37 example, The 88k bcs coff format is implemented in the file
38 @file{coff-m88k.c}. This file @code{#include}s
39 @file{coff/m88k.h} which defines the external structure of the
40 coff format for the 88k, and @file{coff/internal.h} which
41 defines the internal structure. @file{coff-m88k.c} also
42 defines the relocations used by the 88k format
45 The Intel i960 processor version of coff is implemented in
46 @file{coff-i960.c}. This file has the same structure as
47 @file{coff-m88k.c}, except that it includes @file{coff/i960.h}
48 rather than @file{coff-m88k.h}.
51 Porting to a new version of coff
53 The recommended method is to select from the existing
54 implementations the version of coff which is most like the one
55 you want to use. For example, we'll say that i386 coff is
56 the one you select, and that your coff flavour is called foo.
57 Copy @file{i386coff.c} to @file{foocoff.c}, copy
58 @file{../include/coff/i386.h} to @file{../include/coff/foo.h},
59 and add the lines to @file{targets.c} and @file{Makefile.in}
60 so that your new back end is used. Alter the shapes of the
61 structures in @file{../include/coff/foo.h} so that they match
62 what you need. You will probably also have to add
63 @code{#ifdef}s to the code in @file{coff/internal.h} and
64 @file{coffcode.h} if your version of coff is too wild.
66 You can verify that your new BFD backend works quite simply by
67 building @file{objdump} from the @file{binutils} directory,
68 and making sure that its version of what's going on and your
69 host system's idea (assuming it has the pretty standard coff
70 dump utility, usually called @code{att-dump} or just
71 @code{dump}) are the same. Then clean up your code, and send
72 what you've done to Cygnus. Then your stuff will be in the
73 next release, and you won't have to keep integrating it.
76 How the coff backend works
81 The Coff backend is split into generic routines that are
82 applicable to any Coff target and routines that are specific
83 to a particular target. The target-specific routines are
84 further split into ones which are basically the same for all
85 Coff targets except that they use the external symbol format
86 or use different values for certain constants.
88 The generic routines are in @file{coffgen.c}. These routines
89 work for any Coff target. They use some hooks into the target
90 specific code; the hooks are in a @code{bfd_coff_backend_data}
91 structure, one of which exists for each target.
93 The essentially similar target-specific routines are in
94 @file{coffcode.h}. This header file includes executable C code.
95 The various Coff targets first include the appropriate Coff
96 header file, make any special defines that are needed, and
97 then include @file{coffcode.h}.
99 Some of the Coff targets then also have additional routines in
100 the target source file itself.
102 For example, @file{coff-i960.c} includes
103 @file{coff/internal.h} and @file{coff/i960.h}. It then
104 defines a few constants, such as @code{I960}, and includes
105 @file{coffcode.h}. Since the i960 has complex relocation
106 types, @file{coff-i960.c} also includes some code to
107 manipulate the i960 relocs. This code is not in
108 @file{coffcode.h} because it would not be used by any other
114 Each flavour of coff supported in BFD has its own header file
115 describing the external layout of the structures. There is also
116 an internal description of the coff layout, in
117 @file{coff/internal.h}. A major function of the
118 coff backend is swapping the bytes and twiddling the bits to
119 translate the external form of the structures into the normal
120 internal form. This is all performed in the
121 @code{bfd_swap}_@i{thing}_@i{direction} routines. Some
122 elements are different sizes between different versions of
123 coff; it is the duty of the coff version specific include file
124 to override the definitions of various packing routines in
125 @file{coffcode.h}. E.g., the size of line number entry in coff is
126 sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
127 @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
128 correct one. No doubt, some day someone will find a version of
129 coff which has a varying field size not catered to at the
130 moment. To port BFD, that person will have to add more @code{#defines}.
131 Three of the bit twiddling routines are exported to
132 @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
133 and @code{coff_swap_linno_in}. @code{GDB} reads the symbol
134 table on its own, but uses BFD to fix things up. More of the
135 bit twiddlers are exported for @code{gas};
136 @code{coff_swap_aux_out}, @code{coff_swap_sym_out},
137 @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
138 @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
139 @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
140 of all the symbol table and reloc drudgery itself, thereby
141 saving the internal BFD overhead, but uses BFD to swap things
142 on the way out, making cross ports much safer. Doing so also
143 allows BFD (and thus the linker) to use the same header files
144 as @code{gas}, which makes one avenue to disaster disappear.
149 The simple canonical form for symbols used by BFD is not rich
150 enough to keep all the information available in a coff symbol
151 table. The back end gets around this problem by keeping the original
152 symbol table around, "behind the scenes".
154 When a symbol table is requested (through a call to
155 @code{bfd_canonicalize_symtab}), a request gets through to
156 @code{coff_get_normalized_symtab}. This reads the symbol table from
157 the coff file and swaps all the structures inside into the
158 internal form. It also fixes up all the pointers in the table
159 (represented in the file by offsets from the first symbol in
160 the table) into physical pointers to elements in the new
161 internal table. This involves some work since the meanings of
162 fields change depending upon context: a field that is a
163 pointer to another structure in the symbol table at one moment
164 may be the size in bytes of a structure at the next. Another
165 pass is made over the table. All symbols which mark file names
166 (<<C_FILE>> symbols) are modified so that the internal
167 string points to the value in the auxent (the real filename)
168 rather than the normal text associated with the symbol
171 At this time the symbol names are moved around. Coff stores
172 all symbols less than nine characters long physically
173 within the symbol table; longer strings are kept at the end of
174 the file in the string table. This pass moves all strings
175 into memory and replaces them with pointers to the strings.
178 The symbol table is massaged once again, this time to create
179 the canonical table used by the BFD application. Each symbol
180 is inspected in turn, and a decision made (using the
181 @code{sclass} field) about the various flags to set in the
182 @code{asymbol}. @xref{Symbols}. The generated canonical table
183 shares strings with the hidden internal symbol table.
185 Any linenumbers are read from the coff file too, and attached
186 to the symbols which own the functions the linenumbers belong to.
191 Writing a symbol to a coff file which didn't come from a coff
192 file will lose any debugging information. The @code{asymbol}
193 structure remembers the BFD from which the symbol was taken, and on
194 output the back end makes sure that the same destination target as
195 source target is present.
197 When the symbols have come from a coff file then all the
198 debugging information is preserved.
200 Symbol tables are provided for writing to the back end in a
201 vector of pointers to pointers. This allows applications like
202 the linker to accumulate and output large symbol tables
203 without having to do too much byte copying.
205 This function runs through the provided symbol table and
206 patches each symbol marked as a file place holder
207 (@code{C_FILE}) to point to the next file place holder in the
208 list. It also marks each @code{offset} field in the list with
209 the offset from the first symbol of the current symbol.
211 Another function of this procedure is to turn the canonical
212 value form of BFD into the form used by coff. Internally, BFD
213 expects symbol values to be offsets from a section base; so a
214 symbol physically at 0x120, but in a section starting at
215 0x100, would have the value 0x20. Coff expects symbols to
216 contain their final value, so symbols have their values
217 changed at this point to reflect their sum with their owning
218 section. This transformation uses the
219 <<output_section>> field of the @code{asymbol}'s
220 @code{asection} @xref{Sections}.
222 o <<coff_mangle_symbols>>
224 This routine runs though the provided symbol table and uses
225 the offsets generated by the previous pass and the pointers
226 generated when the symbol table was read in to create the
227 structured hierachy required by coff. It changes each pointer
228 to a symbol into the index into the symbol table of the asymbol.
230 o <<coff_write_symbols>>
232 This routine runs through the symbol table and patches up the
233 symbols from their internal form into the coff way, calls the
234 bit twiddlers, and writes out the table to the file.
243 The hidden information for an <<asymbol>> is described in a
244 <<combined_entry_type>>:
248 .typedef struct coff_ptr_struct
251 . {* Remembers the offset from the first symbol in the file for
252 . this symbol. Generated by coff_renumber_symbols. *}
253 .unsigned int offset;
255 . {* Should the value of this symbol be renumbered. Used for
256 . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
257 .unsigned int fix_value : 1;
259 . {* Should the tag field of this symbol be renumbered.
260 . Created by coff_pointerize_aux. *}
261 .unsigned int fix_tag : 1;
263 . {* Should the endidx field of this symbol be renumbered.
264 . Created by coff_pointerize_aux. *}
265 .unsigned int fix_end : 1;
267 . {* Should the x_csect.x_scnlen field be renumbered.
268 . Created by coff_pointerize_aux. *}
269 .unsigned int fix_scnlen : 1;
271 . {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the
272 . index into the line number entries. Set by
273 . coff_slurp_symbol_table. *}
274 .unsigned int fix_line : 1;
276 . {* The container for the symbol structure as read and translated
280 . union internal_auxent auxent;
281 . struct internal_syment syment;
283 .} combined_entry_type;
286 .{* Each canonical asymbol really looks like this: *}
288 .typedef struct coff_symbol_struct
290 . {* The actual symbol which the rest of BFD works with *}
293 . {* A pointer to the hidden information for this symbol *}
294 .combined_entry_type *native;
296 . {* A pointer to the linenumber information for this symbol *}
297 .struct lineno_cache_entry *lineno;
299 . {* Have the line numbers been relocated yet ? *}
300 .boolean done_lineno;
309 #include "coffswap.h"
312 #define STRING_SIZE_SIZE (4)
314 /* void warning(); */
317 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
318 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
319 * NOTE: If you add to/change this routine, you should mirror the changes
320 * in styp_to_sec_flags().
323 sec_to_styp_flags (sec_name
, sec_flags
)
324 CONST
char *sec_name
;
329 if (!strcmp (sec_name
, _TEXT
))
331 styp_flags
= STYP_TEXT
;
333 else if (!strcmp (sec_name
, _DATA
))
335 styp_flags
= STYP_DATA
;
337 else if (!strcmp (sec_name
, _BSS
))
339 styp_flags
= STYP_BSS
;
342 else if (!strcmp (sec_name
, _COMMENT
))
344 styp_flags
= STYP_INFO
;
345 #endif /* _COMMENT */
348 else if (!strcmp (sec_name
, _LIB
))
350 styp_flags
= STYP_LIB
;
354 else if (!strcmp (sec_name
, _LIT
))
356 styp_flags
= STYP_LIT
;
359 else if (!strcmp (sec_name
, ".debug"))
362 styp_flags
= STYP_DEBUG
;
364 styp_flags
= STYP_INFO
;
367 else if (!strncmp (sec_name
, ".stab", 5))
369 styp_flags
= STYP_INFO
;
372 else if (!strcmp (sec_name
, ".edata"))
374 styp_flags
= STYP_DATA
;
378 else if (!strcmp (sec_name
, _PAD
))
380 styp_flags
= STYP_PAD
;
382 else if (!strcmp (sec_name
, _LOADER
))
384 styp_flags
= STYP_LOADER
;
387 /* Try and figure out what it should be */
388 else if (sec_flags
& SEC_CODE
)
390 styp_flags
= STYP_TEXT
;
392 else if (sec_flags
& SEC_DATA
)
394 styp_flags
= STYP_DATA
;
396 else if (sec_flags
& SEC_READONLY
)
398 #ifdef STYP_LIT /* 29k readonly text/data section */
399 styp_flags
= STYP_LIT
;
401 styp_flags
= STYP_TEXT
;
402 #endif /* STYP_LIT */
404 else if (sec_flags
& SEC_LOAD
)
406 styp_flags
= STYP_TEXT
;
408 else if (sec_flags
& SEC_ALLOC
)
410 styp_flags
= STYP_BSS
;
414 if ((sec_flags
& (SEC_NEVER_LOAD
| SEC_COFF_SHARED_LIBRARY
)) != 0)
415 styp_flags
|= STYP_NOLOAD
;
419 if (sec_flags
& SEC_LINK_ONCE
)
420 styp_flags
|= IMAGE_SCN_LNK_COMDAT
;
426 * Return a word with SEC_* flags set to represent the incoming
427 * STYP_* flags (from scnhdr.s_flags). The inverse of this
428 * function is sec_to_styp_flags().
429 * NOTE: If you add to/change this routine, you should mirror the changes
430 * in sec_to_styp_flags().
433 styp_to_sec_flags (abfd
, hdr
, name
)
438 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
439 long styp_flags
= internal_s
->s_flags
;
440 flagword sec_flags
= 0;
443 if (styp_flags
& STYP_NOLOAD
)
445 sec_flags
|= SEC_NEVER_LOAD
;
447 #endif /* STYP_NOLOAD */
449 /* For 386 COFF, at least, an unloadable text or data section is
450 actually a shared library section. */
451 if (styp_flags
& STYP_TEXT
)
453 if (sec_flags
& SEC_NEVER_LOAD
)
454 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
456 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
458 else if (styp_flags
& STYP_DATA
)
460 if (sec_flags
& SEC_NEVER_LOAD
)
461 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
463 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
465 else if (styp_flags
& STYP_BSS
)
467 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
468 if (sec_flags
& SEC_NEVER_LOAD
)
469 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
472 sec_flags
|= SEC_ALLOC
;
474 else if (styp_flags
& STYP_INFO
)
476 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
477 defined. coff_compute_section_file_positions uses
478 COFF_PAGE_SIZE to ensure that the low order bits of the
479 section VMA and the file offset match. If we don't know
480 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
481 and demand page loading of the file will fail. */
482 #ifdef COFF_PAGE_SIZE
483 sec_flags
|= SEC_DEBUGGING
;
486 else if (styp_flags
& STYP_PAD
)
490 else if (strcmp (name
, _TEXT
) == 0)
492 if (sec_flags
& SEC_NEVER_LOAD
)
493 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
495 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
497 else if (strcmp (name
, _DATA
) == 0)
499 if (sec_flags
& SEC_NEVER_LOAD
)
500 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
502 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
504 else if (strcmp (name
, _BSS
) == 0)
506 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
507 if (sec_flags
& SEC_NEVER_LOAD
)
508 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
511 sec_flags
|= SEC_ALLOC
;
513 else if (strcmp (name
, ".debug") == 0
515 || strcmp (name
, _COMMENT
) == 0
517 || strncmp (name
, ".stab", 5) == 0)
519 #ifdef COFF_PAGE_SIZE
520 sec_flags
|= SEC_DEBUGGING
;
524 else if (strcmp (name
, _LIB
) == 0)
528 else if (strcmp (name
, _LIT
) == 0)
530 sec_flags
= SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
;
535 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
538 #ifdef STYP_LIT /* A29k readonly text/data section type */
539 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
541 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
543 #endif /* STYP_LIT */
544 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
545 if (styp_flags
& STYP_OTHER_LOAD
)
547 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
549 #endif /* STYP_SDATA */
552 if (styp_flags
& IMAGE_SCN_LNK_REMOVE
)
553 sec_flags
|= SEC_EXCLUDE
;
555 if (styp_flags
& IMAGE_SCN_LNK_COMDAT
)
557 sec_flags
|= SEC_LINK_ONCE
;
559 /* Unfortunately, the PE format stores essential information in
560 the symbol table, of all places. We need to extract that
561 information now, so that objdump and the linker will know how
562 to handle the section without worrying about the symbols. We
563 can't call slurp_symtab, because the linker doesn't want the
566 if (_bfd_coff_get_external_symbols (abfd
))
568 bfd_byte
*esym
, *esymend
;
570 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
571 esymend
= esym
+ obj_raw_syment_count (abfd
) * SYMESZ
;
573 while (esym
< esymend
)
575 struct internal_syment isym
;
577 bfd_coff_swap_sym_in (abfd
, (PTR
) esym
, (PTR
) &isym
);
579 if (sizeof (internal_s
->s_name
) > SYMNMLEN
)
581 /* This case implies that the matching symbol name
582 will be in the string table. */
586 if (isym
.n_sclass
== C_STAT
587 && isym
.n_type
== T_NULL
588 && isym
.n_numaux
== 1
589 && isym
._n
._n_n
._n_zeroes
!= 0)
591 char buf
[SYMNMLEN
+ 1];
593 memcpy (buf
, isym
._n
._n_name
, SYMNMLEN
);
594 buf
[SYMNMLEN
] = '\0';
596 if (strcmp (name
, buf
) == 0)
598 union internal_auxent aux
;
600 /* This is the section symbol. */
602 bfd_coff_swap_aux_in (abfd
, (PTR
) (esym
+ SYMESZ
),
603 isym
.n_type
, isym
.n_sclass
,
604 0, isym
.n_numaux
, (PTR
) &aux
);
606 switch (aux
.x_scn
.x_comdat
)
608 case IMAGE_COMDAT_SELECT_NODUPLICATES
:
609 sec_flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
613 case IMAGE_COMDAT_SELECT_ANY
:
614 sec_flags
|= SEC_LINK_DUPLICATES_DISCARD
;
617 case IMAGE_COMDAT_SELECT_SAME_SIZE
:
618 sec_flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
621 case IMAGE_COMDAT_SELECT_EXACT_MATCH
:
622 sec_flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
625 case IMAGE_COMDAT_SELECT_ASSOCIATIVE
:
626 /* FIXME: This is not currently implemented. */
627 sec_flags
|= SEC_LINK_DUPLICATES_DISCARD
;
635 esym
+= (isym
.n_numaux
+ 1) * SYMESZ
;
644 #define get_index(symbol) ((symbol)->udata.i)
648 bfd_coff_backend_data
652 Special entry points for gdb to swap in coff symbol table parts:
655 . void (*_bfd_coff_swap_aux_in) PARAMS ((
664 . void (*_bfd_coff_swap_sym_in) PARAMS ((
669 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
675 Special entry points for gas to swap out coff parts:
677 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
686 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
691 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
696 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
701 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
706 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
711 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
717 Special entry points for generic COFF routines to call target
718 dependent COFF routines:
720 . unsigned int _bfd_filhsz;
721 . unsigned int _bfd_aoutsz;
722 . unsigned int _bfd_scnhsz;
723 . unsigned int _bfd_symesz;
724 . unsigned int _bfd_auxesz;
725 . unsigned int _bfd_relsz;
726 . unsigned int _bfd_linesz;
727 . boolean _bfd_coff_long_filenames;
728 . boolean _bfd_coff_long_section_names;
729 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
733 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
737 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
741 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
745 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
747 . PTR internal_filehdr));
748 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
750 . PTR internal_filehdr));
751 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
753 . PTR internal_filehdr,
754 . PTR internal_aouthdr));
755 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
757 . PTR internal_scnhdr,
758 . const char *name));
759 . void (*_bfd_set_alignment_hook) PARAMS ((
762 . PTR internal_scnhdr));
763 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
765 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
767 . struct internal_syment *sym));
768 . boolean (*_bfd_coff_pointerize_aux_hook) PARAMS ((
770 . combined_entry_type *table_base,
771 . combined_entry_type *symbol,
772 . unsigned int indaux,
773 . combined_entry_type *aux));
774 . boolean (*_bfd_coff_print_aux) PARAMS ((
777 . combined_entry_type *table_base,
778 . combined_entry_type *symbol,
779 . combined_entry_type *aux,
780 . unsigned int indaux));
781 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
783 . struct bfd_link_info *link_info,
784 . struct bfd_link_order *link_order,
787 . unsigned int *src_ptr,
788 . unsigned int *dst_ptr));
789 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
791 . asection *input_section,
793 . unsigned int shrink,
794 . struct bfd_link_info *link_info));
795 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
797 . struct internal_syment *));
798 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
800 . boolean (*_bfd_coff_start_final_link) PARAMS ((
802 . struct bfd_link_info *info));
803 . boolean (*_bfd_coff_relocate_section) PARAMS ((
805 . struct bfd_link_info *info,
807 . asection *input_section,
808 . bfd_byte *contents,
809 . struct internal_reloc *relocs,
810 . struct internal_syment *syms,
811 . asection **sections));
812 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
815 . struct internal_reloc *rel,
816 . struct coff_link_hash_entry *h,
817 . struct internal_syment *sym,
818 . bfd_vma *addendp));
819 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
821 . struct bfd_link_info *info,
824 . struct internal_reloc *reloc,
825 . boolean *adjustedp));
826 . boolean (*_bfd_coff_link_add_one_symbol) PARAMS ((
827 . struct bfd_link_info *info,
833 . const char *string,
836 . struct bfd_link_hash_entry **hashp));
838 .} bfd_coff_backend_data;
840 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
842 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
843 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
845 .#define bfd_coff_swap_sym_in(a,e,i) \
846 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
848 .#define bfd_coff_swap_lineno_in(a,e,i) \
849 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
851 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
852 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
854 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
855 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
857 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
858 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
860 .#define bfd_coff_swap_sym_out(abfd, i,o) \
861 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
863 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
864 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
866 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
867 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
869 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
870 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
872 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
873 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
874 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
875 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
876 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
877 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
878 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
879 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
880 .#define bfd_coff_long_section_names(abfd) \
881 . (coff_backend_info (abfd)->_bfd_coff_long_section_names)
882 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
883 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
885 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
886 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
888 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
889 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
891 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
892 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
894 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
895 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
897 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
898 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
899 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
900 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
902 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
903 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
905 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
906 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
908 .#define bfd_coff_slurp_symbol_table(abfd)\
909 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
911 .#define bfd_coff_symname_in_debug(abfd, sym)\
912 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
914 .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
915 . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
916 . (abfd, file, base, symbol, aux, indaux))
918 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
919 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
920 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
922 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
923 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
924 . (abfd, section, reloc, shrink, link_info))
926 .#define bfd_coff_sym_is_global(abfd, sym)\
927 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
930 .#define bfd_coff_compute_section_file_positions(abfd)\
931 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
934 .#define bfd_coff_start_final_link(obfd, info)\
935 . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
937 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
938 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
939 . (obfd, info, ibfd, o, con, rel, isyms, secs))
940 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
941 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
942 . (abfd, sec, rel, h, sym, addendp))
943 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
944 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
945 . (obfd, info, ibfd, sec, rel, adjustedp))
946 .#define bfd_coff_link_add_one_symbol(info,abfd,name,flags,section,value,string,cp,coll,hashp)\
947 . ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\
948 . (info, abfd, name, flags, section, value, string, cp, coll, hashp))
952 /* See whether the magic number matches. */
955 coff_bad_format_hook (abfd
, filehdr
)
959 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
961 if (BADMAG (*internal_f
))
964 /* if the optional header is NULL or not the correct size then
965 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
966 and Intel 960 readwrite headers (I960WRMAGIC) is that the
967 optional header is of a different size.
969 But the mips keeps extra stuff in it's opthdr, so dont check
973 #if defined(M88) || defined(I960)
974 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
982 initialize a section structure with information peculiar to this
983 particular implementation of coff
987 coff_new_section_hook (abfd
, section
)
991 section
->alignment_power
= COFF_DEFAULT_SECTION_ALIGNMENT_POWER
;
994 if (xcoff_data (abfd
)->text_align_power
!= 0
995 && strcmp (bfd_get_section_name (abfd
, section
), ".text") == 0)
996 section
->alignment_power
= xcoff_data (abfd
)->text_align_power
;
997 if (xcoff_data (abfd
)->data_align_power
!= 0
998 && strcmp (bfd_get_section_name (abfd
, section
), ".data") == 0)
999 section
->alignment_power
= xcoff_data (abfd
)->data_align_power
;
1002 /* Allocate aux records for section symbols, to store size and
1005 @@ The 10 is a guess at a plausible maximum number of aux entries
1006 (but shouldn't be a constant). */
1007 coffsymbol (section
->symbol
)->native
=
1008 (combined_entry_type
*) bfd_zalloc (abfd
,
1009 sizeof (combined_entry_type
) * 10);
1011 /* The .stab section must be aligned to 2**2 at most, because
1012 otherwise there may be gaps in the section which gdb will not
1013 know how to interpret. Examining the section name is a hack, but
1014 that is also how gdb locates the section.
1015 We need to handle the .ctors and .dtors sections similarly, to
1016 avoid introducing null words in the tables. */
1017 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 2
1018 && (strncmp (section
->name
, ".stab", 5) == 0
1019 || strcmp (section
->name
, ".ctors") == 0
1020 || strcmp (section
->name
, ".dtors") == 0))
1021 section
->alignment_power
= 2;
1023 /* Similarly, the .stabstr section must be aligned to 2**0 at most. */
1024 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 0
1025 && strncmp (section
->name
, ".stabstr", 8) == 0)
1026 section
->alignment_power
= 0;
1033 /* Set the alignment of a BFD section. */
1036 coff_set_alignment_hook (abfd
, section
, scnhdr
)
1041 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
1044 for (i
= 0; i
< 32; i
++)
1045 if ((1 << i
) >= hdr
->s_align
)
1047 section
->alignment_power
= i
;
1053 /* a couple of macros to help setting the alignment power field */
1054 #define ALIGN_SET(field,x,y) \
1055 if (((field) & IMAGE_SCN_ALIGN_64BYTES) == x )\
1057 section->alignment_power = y;\
1060 #define ELIFALIGN_SET(field,x,y) \
1061 else if (( (field) & IMAGE_SCN_ALIGN_64BYTES) == x ) \
1063 section->alignment_power = y;\
1067 coff_set_alignment_hook (abfd
, section
, scnhdr
)
1072 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
1074 ALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_64BYTES
, 6)
1075 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_32BYTES
, 5)
1076 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_16BYTES
, 4)
1077 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_8BYTES
, 3)
1078 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_4BYTES
, 2)
1079 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_2BYTES
, 1)
1080 ELIFALIGN_SET (hdr
->s_flags
, IMAGE_SCN_ALIGN_1BYTES
, 0)
1082 #ifdef POWERPC_LE_PE
1083 if (strcmp (section
->name
, ".idata$2") == 0)
1085 section
->alignment_power
= 0;
1087 else if (strcmp (section
->name
, ".idata$3") == 0)
1089 section
->alignment_power
= 0;
1091 else if (strcmp (section
->name
, ".idata$4") == 0)
1093 section
->alignment_power
= 2;
1095 else if (strcmp (section
->name
, ".idata$5") == 0)
1097 section
->alignment_power
= 2;
1099 else if (strcmp (section
->name
, ".idata$6") == 0)
1101 section
->alignment_power
= 1;
1103 else if (strcmp (section
->name
, ".reloc") == 0)
1105 section
->alignment_power
= 1;
1107 else if (strncmp (section
->name
, ".stab", 5) == 0)
1109 section
->alignment_power
= 2;
1114 #undef ELIFALIGN_SET
1116 #else /* ! COFF_WITH_PE */
1119 /* We grossly abuse this function to handle XCOFF overflow headers.
1120 When we see one, we correct the reloc and line number counts in the
1121 real header, and remove the section we just created. */
1124 coff_set_alignment_hook (abfd
, section
, scnhdr
)
1129 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
1133 if ((hdr
->s_flags
& STYP_OVRFLO
) == 0)
1136 real_sec
= coff_section_from_bfd_index (abfd
, hdr
->s_nreloc
);
1137 if (real_sec
== NULL
)
1140 real_sec
->reloc_count
= hdr
->s_paddr
;
1141 real_sec
->lineno_count
= hdr
->s_vaddr
;
1143 for (ps
= &abfd
->sections
; *ps
!= NULL
; ps
= &(*ps
)->next
)
1148 --abfd
->section_count
;
1154 #else /* ! RS6000COFF_C */
1156 #define coff_set_alignment_hook \
1157 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
1159 #endif /* ! RS6000COFF_C */
1160 #endif /* ! COFF_WITH_PE */
1163 #ifndef coff_mkobject
1165 coff_mkobject (abfd
)
1168 coff_data_type
*coff
;
1170 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*) bfd_zalloc (abfd
, sizeof (coff_data_type
));
1171 if (abfd
->tdata
.coff_obj_data
== 0)
1173 coff
= coff_data (abfd
);
1174 coff
->symbols
= (coff_symbol_type
*) NULL
;
1175 coff
->conversion_table
= (unsigned int *) NULL
;
1176 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
1177 coff
->relocbase
= 0;
1178 coff
->local_toc_sym_map
= 0;
1180 /* make_abs_section(abfd);*/
1186 /* Create the COFF backend specific information. */
1187 #ifndef coff_mkobject_hook
1189 coff_mkobject_hook (abfd
, filehdr
, aouthdr
)
1194 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1195 coff_data_type
*coff
;
1197 if (coff_mkobject (abfd
) == false)
1200 coff
= coff_data (abfd
);
1202 coff
->sym_filepos
= internal_f
->f_symptr
;
1204 /* These members communicate important constants about the symbol
1205 table to GDB's symbol-reading code. These `constants'
1206 unfortunately vary among coff implementations... */
1207 coff
->local_n_btmask
= N_BTMASK
;
1208 coff
->local_n_btshft
= N_BTSHFT
;
1209 coff
->local_n_tmask
= N_TMASK
;
1210 coff
->local_n_tshift
= N_TSHIFT
;
1211 coff
->local_symesz
= SYMESZ
;
1212 coff
->local_auxesz
= AUXESZ
;
1213 coff
->local_linesz
= LINESZ
;
1215 obj_raw_syment_count (abfd
) =
1216 obj_conv_table_size (abfd
) =
1217 internal_f
->f_nsyms
;
1220 if ((internal_f
->f_flags
& F_SHROBJ
) != 0)
1221 abfd
->flags
|= DYNAMIC
;
1222 if (aouthdr
!= NULL
&& internal_f
->f_opthdr
>= AOUTSZ
)
1224 struct internal_aouthdr
*internal_a
=
1225 (struct internal_aouthdr
*) aouthdr
;
1226 struct xcoff_tdata
*xcoff
;
1228 xcoff
= xcoff_data (abfd
);
1229 xcoff
->full_aouthdr
= true;
1230 xcoff
->toc
= internal_a
->o_toc
;
1231 xcoff
->sntoc
= internal_a
->o_sntoc
;
1232 xcoff
->snentry
= internal_a
->o_snentry
;
1233 xcoff
->text_align_power
= internal_a
->o_algntext
;
1234 xcoff
->data_align_power
= internal_a
->o_algndata
;
1235 xcoff
->modtype
= internal_a
->o_modtype
;
1236 xcoff
->cputype
= internal_a
->o_cputype
;
1237 xcoff
->maxdata
= internal_a
->o_maxdata
;
1238 xcoff
->maxstack
= internal_a
->o_maxstack
;
1246 /* Determine the machine architecture and type. FIXME: This is target
1247 dependent because the magic numbers are defined in the target
1248 dependent header files. But there is no particular need for this.
1249 If the magic numbers were moved to a separate file, this function
1250 would be target independent and would also be much more successful
1251 at linking together COFF files for different architectures. */
1254 coff_set_arch_mach_hook (abfd
, filehdr
)
1259 enum bfd_architecture arch
;
1260 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1263 switch (internal_f
->f_magic
)
1267 arch
= bfd_arch_powerpc
;
1268 machine
= 0; /* what does this mean? (krk) */
1274 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
1275 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
1276 arch
= bfd_arch_i386
;
1280 #ifdef A29K_MAGIC_BIG
1281 case A29K_MAGIC_BIG
:
1282 case A29K_MAGIC_LITTLE
:
1283 arch
= bfd_arch_a29k
;
1289 arch
= bfd_arch_arm
;
1296 #ifdef MC68KBCSMAGIC
1299 #ifdef APOLLOM68KMAGIC
1300 case APOLLOM68KMAGIC
:
1302 #ifdef LYNXCOFFMAGIC
1305 arch
= bfd_arch_m68k
;
1313 arch
= bfd_arch_m88k
;
1319 arch
= bfd_arch_z8k
;
1320 switch (internal_f
->f_flags
& F_MACHMASK
)
1323 machine
= bfd_mach_z8001
;
1326 machine
= bfd_mach_z8002
;
1335 arch
= bfd_arch_i860
;
1342 arch
= bfd_arch_i960
;
1343 switch (F_I960TYPE
& internal_f
->f_flags
)
1347 machine
= bfd_mach_i960_core
;
1350 machine
= bfd_mach_i960_kb_sb
;
1353 machine
= bfd_mach_i960_mc
;
1356 machine
= bfd_mach_i960_xa
;
1359 machine
= bfd_mach_i960_ca
;
1362 machine
= bfd_mach_i960_ka_sa
;
1365 machine
= bfd_mach_i960_jx
;
1368 machine
= bfd_mach_i960_hx
;
1382 if (xcoff_data (abfd
)->cputype
!= -1)
1383 cputype
= xcoff_data (abfd
)->cputype
& 0xff;
1386 /* We did not get a value from the a.out header. If the
1387 file has not been stripped, we may be able to get the
1388 architecture information from the first symbol, if it
1389 is a .file symbol. */
1390 if (obj_raw_syment_count (abfd
) == 0)
1394 bfd_byte buf
[SYMESZ
];
1395 struct internal_syment sym
;
1397 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1398 || bfd_read (buf
, 1, SYMESZ
, abfd
) != SYMESZ
)
1400 coff_swap_sym_in (abfd
, (PTR
) buf
, (PTR
) &sym
);
1401 if (sym
.n_sclass
== C_FILE
)
1402 cputype
= sym
.n_type
& 0xff;
1408 /* FIXME: We don't handle all cases here. */
1414 /* PowerPC Macs use the same magic numbers as RS/6000
1415 (because that's how they were bootstrapped originally),
1416 but they are always PowerPC architecture. */
1417 arch
= bfd_arch_powerpc
;
1420 arch
= bfd_arch_rs6000
;
1422 #endif /* POWERMAC */
1426 arch
= bfd_arch_powerpc
;
1429 case 2: /* 64 bit PowerPC */
1430 arch
= bfd_arch_powerpc
;
1434 arch
= bfd_arch_powerpc
;
1438 arch
= bfd_arch_rs6000
;
1448 arch
= bfd_arch_we32k
;
1455 arch
= bfd_arch_h8300
;
1456 machine
= bfd_mach_h8300
;
1457 /* !! FIXME this probably isn't the right place for this */
1458 abfd
->flags
|= BFD_IS_RELAXABLE
;
1464 arch
= bfd_arch_h8300
;
1465 machine
= bfd_mach_h8300h
;
1466 /* !! FIXME this probably isn't the right place for this */
1467 abfd
->flags
|= BFD_IS_RELAXABLE
;
1471 #ifdef SH_ARCH_MAGIC_BIG
1472 case SH_ARCH_MAGIC_BIG
:
1473 case SH_ARCH_MAGIC_LITTLE
:
1481 arch
= bfd_arch_h8500
;
1488 #ifdef LYNXCOFFMAGIC
1491 arch
= bfd_arch_sparc
;
1496 default: /* Unreadable input file type */
1497 arch
= bfd_arch_obscure
;
1501 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1505 #ifdef SYMNAME_IN_DEBUG
1508 symname_in_debug_hook (abfd
, sym
)
1510 struct internal_syment
*sym
;
1512 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1517 #define symname_in_debug_hook \
1518 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1524 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1526 static boolean coff_pointerize_aux_hook
1527 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1528 unsigned int, combined_entry_type
*));
1532 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1534 combined_entry_type
*table_base
;
1535 combined_entry_type
*symbol
;
1536 unsigned int indaux
;
1537 combined_entry_type
*aux
;
1539 int class = symbol
->u
.syment
.n_sclass
;
1541 if ((class == C_EXT
|| class == C_HIDEXT
)
1542 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1544 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
1546 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
1547 table_base
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
1548 aux
->fix_scnlen
= 1;
1551 /* Return true to indicate that the caller should not do any
1552 further work on this auxent. */
1556 /* Return false to indicate that this auxent should be handled by
1564 /* We don't want to pointerize bal entries. */
1566 static boolean coff_pointerize_aux_hook
1567 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1568 unsigned int, combined_entry_type
*));
1572 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1574 combined_entry_type
*table_base
;
1575 combined_entry_type
*symbol
;
1576 unsigned int indaux
;
1577 combined_entry_type
*aux
;
1579 /* Return true if we don't want to pointerize this aux entry, which
1580 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1582 && (symbol
->u
.syment
.n_sclass
== C_LEAFPROC
1583 || symbol
->u
.syment
.n_sclass
== C_LEAFSTAT
1584 || symbol
->u
.syment
.n_sclass
== C_LEAFEXT
));
1589 #define coff_pointerize_aux_hook 0
1592 #endif /* ! RS6000COFF_C */
1594 /* Print an aux entry. This returns true if it has printed it. */
1596 static boolean coff_print_aux
1597 PARAMS ((bfd
*, FILE *, combined_entry_type
*, combined_entry_type
*,
1598 combined_entry_type
*, unsigned int));
1601 coff_print_aux (abfd
, file
, table_base
, symbol
, aux
, indaux
)
1604 combined_entry_type
*table_base
;
1605 combined_entry_type
*symbol
;
1606 combined_entry_type
*aux
;
1607 unsigned int indaux
;
1610 if ((symbol
->u
.syment
.n_sclass
== C_EXT
1611 || symbol
->u
.syment
.n_sclass
== C_HIDEXT
)
1612 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1614 /* This is a csect entry. */
1615 fprintf (file
, "AUX ");
1616 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) != XTY_LD
)
1618 BFD_ASSERT (! aux
->fix_scnlen
);
1619 fprintf (file
, "val %5ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1623 fprintf (file
, "indx ");
1624 if (! aux
->fix_scnlen
)
1625 fprintf (file
, "%4ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1627 fprintf (file
, "%4ld",
1628 (long) (aux
->u
.auxent
.x_csect
.x_scnlen
.p
- table_base
));
1631 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1632 aux
->u
.auxent
.x_csect
.x_parmhash
,
1633 (unsigned int) aux
->u
.auxent
.x_csect
.x_snhash
,
1634 SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
),
1635 SMTYP_ALIGN (aux
->u
.auxent
.x_csect
.x_smtyp
),
1636 (unsigned int) aux
->u
.auxent
.x_csect
.x_smclas
,
1637 aux
->u
.auxent
.x_csect
.x_stab
,
1638 (unsigned int) aux
->u
.auxent
.x_csect
.x_snstab
);
1643 /* Return false to indicate that no special action was taken. */
1651 To write relocations, the back end steps though the
1652 canonical relocation table and create an
1653 @code{internal_reloc}. The symbol index to use is removed from
1654 the @code{offset} field in the symbol table supplied. The
1655 address comes directly from the sum of the section base
1656 address and the relocation offset; the type is dug directly
1657 from the howto field. Then the @code{internal_reloc} is
1658 swapped into the shape of an @code{external_reloc} and written
1665 static int compare_arelent_ptr
PARAMS ((const PTR
, const PTR
));
1667 /* AUX's ld wants relocations to be sorted */
1669 compare_arelent_ptr (x
, y
)
1673 const arelent
**a
= (const arelent
**) x
;
1674 const arelent
**b
= (const arelent
**) y
;
1675 bfd_size_type aadr
= (*a
)->address
;
1676 bfd_size_type badr
= (*b
)->address
;
1678 return (aadr
< badr
? -1 : badr
< aadr
? 1 : 0);
1681 #endif /* TARG_AUX */
1684 coff_write_relocs (abfd
, first_undef
)
1690 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1693 struct external_reloc dst
;
1699 /* sort relocations before we write them out */
1700 p
= (arelent
**) bfd_malloc (s
->reloc_count
* sizeof (arelent
*));
1701 if (p
== NULL
&& s
->reloc_count
> 0)
1703 memcpy (p
, s
->orelocation
, s
->reloc_count
* sizeof (arelent
*));
1704 qsort (p
, s
->reloc_count
, sizeof (arelent
*), compare_arelent_ptr
);
1707 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1709 for (i
= 0; i
< s
->reloc_count
; i
++)
1711 struct internal_reloc n
;
1713 memset ((PTR
) & n
, 0, sizeof (n
));
1715 /* Now we've renumbered the symbols we know where the
1716 undefined symbols live in the table. Check the reloc
1717 entries for symbols who's output bfd isn't the right one.
1718 This is because the symbol was undefined (which means
1719 that all the pointers are never made to point to the same
1720 place). This is a bad thing,'cause the symbols attached
1721 to the output bfd are indexed, so that the relocation
1722 entries know which symbol index they point to. So we
1723 have to look up the output symbol here. */
1725 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1728 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1729 asymbol
**outsyms
= abfd
->outsymbols
;
1730 for (i
= first_undef
; outsyms
[i
]; i
++)
1732 const char *intable
= outsyms
[i
]->name
;
1733 if (strcmp (intable
, sname
) == 0) {
1734 /* got a hit, so repoint the reloc */
1735 q
->sym_ptr_ptr
= outsyms
+ i
;
1741 n
.r_vaddr
= q
->address
+ s
->vma
;
1744 /* The 29k const/consth reloc pair is a real kludge. The consth
1745 part doesn't have a symbol; it has an offset. So rebuilt
1747 if (q
->howto
->type
== R_IHCONST
)
1748 n
.r_symndx
= q
->addend
;
1753 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1754 /* This is a relocation relative to the absolute symbol. */
1758 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1759 /* Take notice if the symbol reloc points to a symbol
1760 we don't have in our symbol table. What should we
1762 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1767 #ifdef SWAP_OUT_RELOC_OFFSET
1768 n
.r_offset
= q
->addend
;
1772 /* Work out reloc type from what is required */
1773 SELECT_RELOC (n
, q
->howto
);
1775 n
.r_type
= q
->howto
->type
;
1777 coff_swap_reloc_out (abfd
, &n
, &dst
);
1778 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1791 /* Set flags and magic number of a coff file from architecture and machine
1792 type. Result is true if we can represent the arch&type, false if not. */
1795 coff_set_flags (abfd
, magicp
, flagsp
)
1798 unsigned short *flagsp
;
1800 switch (bfd_get_arch (abfd
))
1805 switch (bfd_get_mach (abfd
))
1807 case bfd_mach_z8001
:
1810 case bfd_mach_z8002
:
1824 *magicp
= I960ROMAGIC
;
1826 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1827 I960RWMAGIC); FIXME???
1829 switch (bfd_get_mach (abfd
))
1831 case bfd_mach_i960_core
:
1834 case bfd_mach_i960_kb_sb
:
1837 case bfd_mach_i960_mc
:
1840 case bfd_mach_i960_xa
:
1843 case bfd_mach_i960_ca
:
1846 case bfd_mach_i960_ka_sa
:
1849 case bfd_mach_i960_jx
:
1852 case bfd_mach_i960_hx
:
1869 case bfd_arch_powerpc
:
1876 *magicp
= I386MAGIC
;
1878 /* Just overwrite the usual value if we're doing Lynx. */
1879 *magicp
= LYNXCOFFMAGIC
;
1886 *magicp
= I860MAGIC
;
1892 #ifdef APOLLOM68KMAGIC
1893 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1895 *magicp
= MC68MAGIC
;
1898 /* Just overwrite the usual value if we're doing Lynx. */
1899 *magicp
= LYNXCOFFMAGIC
;
1907 *magicp
= MC88OMAGIC
;
1912 case bfd_arch_h8300
:
1913 switch (bfd_get_mach (abfd
))
1915 case bfd_mach_h8300
:
1916 *magicp
= H8300MAGIC
;
1918 case bfd_mach_h8300h
:
1919 *magicp
= H8300HMAGIC
;
1925 #ifdef SH_ARCH_MAGIC_BIG
1927 if (bfd_big_endian (abfd
))
1928 *magicp
= SH_ARCH_MAGIC_BIG
;
1930 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1936 case bfd_arch_sparc
:
1937 *magicp
= SPARCMAGIC
;
1939 /* Just overwrite the usual value if we're doing Lynx. */
1940 *magicp
= LYNXCOFFMAGIC
;
1947 case bfd_arch_h8500
:
1948 *magicp
= H8500MAGIC
;
1952 #ifdef A29K_MAGIC_BIG
1954 if (bfd_big_endian (abfd
))
1955 *magicp
= A29K_MAGIC_BIG
;
1957 *magicp
= A29K_MAGIC_LITTLE
;
1963 case bfd_arch_we32k
:
1964 *magicp
= WE32KMAGIC
;
1970 case bfd_arch_rs6000
:
1972 case bfd_arch_powerpc
:
1974 *magicp
= U802TOCMAGIC
;
1979 default: /* Unknown architecture */
1980 /* return false; -- fall through to "return false" below, to avoid
1981 "statement never reached" errors on the one below. */
1990 coff_set_arch_mach (abfd
, arch
, machine
)
1992 enum bfd_architecture arch
;
1993 unsigned long machine
;
1996 unsigned short dummy2
;
1998 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
2001 if (arch
!= bfd_arch_unknown
&&
2002 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
2003 return false; /* We can't represent this type */
2005 return true; /* We're easy ... */
2009 /* Calculate the file position for each section. */
2012 coff_compute_section_file_positions (abfd
)
2016 asection
*previous
= (asection
*) NULL
;
2017 file_ptr sofar
= FILHSZ
;
2025 /* On XCOFF, if we have symbols, set up the .debug section. */
2026 if (bfd_get_symcount (abfd
) > 0)
2029 bfd_size_type i
, symcount
;
2033 symcount
= bfd_get_symcount (abfd
);
2034 for (symp
= abfd
->outsymbols
, i
= 0; i
< symcount
; symp
++, i
++)
2036 coff_symbol_type
*cf
;
2038 cf
= coff_symbol_from (abfd
, *symp
);
2040 && cf
->native
!= NULL
2041 && SYMNAME_IN_DEBUG (&cf
->native
->u
.syment
))
2045 len
= strlen (bfd_asymbol_name (*symp
));
2054 dsec
= bfd_make_section_old_way (abfd
, ".debug");
2057 dsec
->_raw_size
= sz
;
2058 dsec
->flags
|= SEC_HAS_CONTENTS
;
2063 #ifdef COFF_IMAGE_WITH_PE
2065 if (coff_data (abfd
)->link_info
)
2067 page_size
= pe_data (abfd
)->pe_opthdr
.FileAlignment
;
2070 page_size
= PE_DEF_FILE_ALIGNMENT
;
2072 #ifdef COFF_PAGE_SIZE
2073 int page_size
= COFF_PAGE_SIZE
;
2077 if (bfd_get_start_address (abfd
))
2079 /* A start address may have been added to the original file. In this
2080 case it will need an optional header to record it. */
2081 abfd
->flags
|= EXEC_P
;
2084 if (abfd
->flags
& EXEC_P
)
2087 else if (xcoff_data (abfd
)->full_aouthdr
)
2090 sofar
+= SMALL_AOUTSZ
;
2093 sofar
+= abfd
->section_count
* SCNHSZ
;
2096 /* XCOFF handles overflows in the reloc and line number count fields
2097 by allocating a new section header to hold the correct counts. */
2098 for (current
= abfd
->sections
; current
!= NULL
; current
= current
->next
)
2099 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2103 for (current
= abfd
->sections
, count
= 1;
2104 current
!= (asection
*) NULL
;
2105 current
= current
->next
, ++count
)
2107 current
->target_index
= count
;
2109 /* Only deal with sections which have contents */
2110 if (!(current
->flags
& SEC_HAS_CONTENTS
))
2113 /* Align the sections in the file to the same boundary on
2114 which they are aligned in virtual memory. I960 doesn't
2115 do this (FIXME) so we can stay in sync with Intel. 960
2116 doesn't yet page from files... */
2118 if ((abfd
->flags
& EXEC_P
) != 0)
2120 /* make sure this section is aligned on the right boundary - by
2121 padding the previous section up if necessary */
2124 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
2125 if (previous
!= (asection
*) NULL
)
2127 previous
->_raw_size
+= sofar
- old_sofar
;
2133 /* In demand paged files the low order bits of the file offset
2134 must match the low order bits of the virtual address. */
2135 #ifdef COFF_PAGE_SIZE
2136 if ((abfd
->flags
& D_PAGED
) != 0
2137 && (current
->flags
& SEC_ALLOC
) != 0)
2138 sofar
+= (current
->vma
- sofar
) % page_size
;
2140 current
->filepos
= sofar
;
2142 #ifdef COFF_IMAGE_WITH_PE
2143 /* With PE we have to pad each section to be a multiple of its page size
2144 too, and remember both sizes. Cooked_size becomes very useful. */
2145 current
->_cooked_size
= current
->_raw_size
;
2146 current
->_raw_size
= (current
->_raw_size
+ page_size
-1) & -page_size
;
2149 sofar
+= current
->_raw_size
;
2152 /* make sure that this section is of the right size too */
2153 if ((abfd
->flags
& EXEC_P
) == 0)
2154 current
->_raw_size
= BFD_ALIGN (current
->_raw_size
,
2155 1 << current
->alignment_power
);
2159 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
2160 current
->_raw_size
+= sofar
- old_sofar
;
2165 /* Force .lib sections to start at zero. The vma is then
2166 incremented in coff_set_section_contents. This is right for
2168 if (strcmp (current
->name
, _LIB
) == 0)
2169 bfd_set_section_vma (abfd
, current
, 0);
2175 obj_relocbase (abfd
) = sofar
;
2176 abfd
->output_has_begun
= true;
2182 /* This can never work, because it is called too late--after the
2183 section positions have been set. I can't figure out what it is
2184 for, so I am going to disable it--Ian Taylor 20 March 1996. */
2186 /* If .file, .text, .data, .bss symbols are missing, add them. */
2187 /* @@ Should we only be adding missing symbols, or overriding the aux
2188 values for existing section symbols? */
2190 coff_add_missing_symbols (abfd
)
2193 unsigned int nsyms
= bfd_get_symcount (abfd
);
2194 asymbol
**sympp
= abfd
->outsymbols
;
2197 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
2199 for (i
= 0; i
< nsyms
; i
++)
2201 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
2205 /* only do this if there is a coff representation of the input
2207 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
2212 name
= csym
->symbol
.name
;
2215 if (!strcmp (name
, _TEXT
))
2218 else if (!strcmp (name
, ".wtext"))
2221 else if (!strcmp (name
, _DATA
))
2223 else if (!strcmp (name
, _BSS
))
2227 /* Now i == bfd_get_symcount (abfd). */
2228 /* @@ For now, don't deal with .file symbol. */
2231 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
2233 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
2234 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
2237 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
2240 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
2244 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
2246 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
2248 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
2249 BFD_ASSERT (i
== nsyms
);
2250 bfd_set_symtab (abfd
, sympp2
, nsyms
);
2259 coff_write_object_contents (abfd
)
2263 boolean hasrelocs
= false;
2264 boolean haslinno
= false;
2266 file_ptr reloc_base
;
2267 file_ptr lineno_base
;
2269 unsigned long reloc_size
= 0;
2270 unsigned long lnno_size
= 0;
2271 asection
*text_sec
= NULL
;
2272 asection
*data_sec
= NULL
;
2273 asection
*bss_sec
= NULL
;
2274 struct internal_filehdr internal_f
;
2275 struct internal_aouthdr internal_a
;
2276 #ifdef COFF_LONG_SECTION_NAMES
2277 size_t string_size
= STRING_SIZE_SIZE
;
2280 bfd_set_error (bfd_error_system_call
);
2282 /* Make a pass through the symbol table to count line number entries and
2283 put them into the correct asections */
2285 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
2287 if (abfd
->output_has_begun
== false)
2288 coff_compute_section_file_positions (abfd
);
2290 reloc_base
= obj_relocbase (abfd
);
2292 /* Work out the size of the reloc and linno areas */
2294 for (current
= abfd
->sections
; current
!= NULL
; current
=
2296 reloc_size
+= current
->reloc_count
* RELSZ
;
2298 lineno_base
= reloc_base
+ reloc_size
;
2299 sym_base
= lineno_base
+ lnno_size
;
2301 /* Indicate in each section->line_filepos its actual file address */
2302 for (current
= abfd
->sections
; current
!= NULL
; current
=
2305 if (current
->lineno_count
)
2307 current
->line_filepos
= lineno_base
;
2308 current
->moving_line_filepos
= lineno_base
;
2309 lineno_base
+= current
->lineno_count
* LINESZ
;
2313 current
->line_filepos
= 0;
2315 if (current
->reloc_count
)
2317 current
->rel_filepos
= reloc_base
;
2318 reloc_base
+= current
->reloc_count
* RELSZ
;
2322 current
->rel_filepos
= 0;
2326 /* Write section headers to the file. */
2327 internal_f
.f_nscns
= 0;
2329 if ((abfd
->flags
& EXEC_P
) != 0)
2330 scn_base
= FILHSZ
+ AOUTSZ
;
2335 if (xcoff_data (abfd
)->full_aouthdr
)
2338 scn_base
+= SMALL_AOUTSZ
;
2342 if (bfd_seek (abfd
, scn_base
, SEEK_SET
) != 0)
2345 for (current
= abfd
->sections
;
2347 current
= current
->next
)
2349 struct internal_scnhdr section
;
2352 /* If we've got a .reloc section, remember. */
2354 #ifdef COFF_IMAGE_WITH_PE
2355 if (strcmp (current
->name
, ".reloc") == 0)
2357 pe_data (abfd
)->has_reloc_section
= 1;
2362 internal_f
.f_nscns
++;
2364 strncpy (section
.s_name
, current
->name
, SCNNMLEN
);
2366 #ifdef COFF_LONG_SECTION_NAMES
2367 /* Handle long section names as in PE. This must be compatible
2368 with the code in coff_write_symbols. */
2372 len
= strlen (current
->name
);
2375 memset (section
.s_name
, 0, SCNNMLEN
);
2376 sprintf (section
.s_name
, "/%d", string_size
);
2377 string_size
+= len
+ 1;
2383 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2384 Ian Taylor <ian@cygnus.com>. */
2385 if (strcmp (current
->name
, _LIB
) == 0)
2386 section
.s_vaddr
= 0;
2389 section
.s_vaddr
= current
->vma
;
2390 section
.s_paddr
= current
->lma
;
2391 section
.s_size
= current
->_raw_size
;
2394 section
.s_paddr
= current
->_cooked_size
;
2398 If this section has no size or is unloadable then the scnptr
2401 if (current
->_raw_size
== 0 ||
2402 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2404 section
.s_scnptr
= 0;
2408 section
.s_scnptr
= current
->filepos
;
2410 section
.s_relptr
= current
->rel_filepos
;
2411 section
.s_lnnoptr
= current
->line_filepos
;
2412 section
.s_nreloc
= current
->reloc_count
;
2413 section
.s_nlnno
= current
->lineno_count
;
2414 if (current
->reloc_count
!= 0)
2416 if (current
->lineno_count
!= 0)
2420 /* Indicate the use of an XCOFF overflow section header. */
2421 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2423 section
.s_nreloc
= 0xffff;
2424 section
.s_nlnno
= 0xffff;
2428 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
2430 if (!strcmp (current
->name
, _TEXT
))
2434 else if (!strcmp (current
->name
, _DATA
))
2438 else if (!strcmp (current
->name
, _BSS
))
2444 section
.s_align
= (current
->alignment_power
2445 ? 1 << current
->alignment_power
2450 #ifdef COFF_IMAGE_WITH_PE
2451 /* suppress output of the sections if they are null. ld includes
2452 the bss and data sections even if there is no size assigned
2453 to them. NT loader doesn't like it if these section headers are
2454 included if the sections themselves are not needed */
2455 if (section
.s_size
== 0)
2456 internal_f
.f_nscns
--;
2461 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
2462 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2467 /* PE stores COMDAT section information in the symbol table. If
2468 this section is supposed to have some COMDAT info, track down
2469 the symbol in the symbol table and modify it. */
2470 if ((current
->flags
& SEC_LINK_ONCE
) != 0)
2472 unsigned int i
, count
;
2475 count
= bfd_get_symcount (abfd
);
2476 for (i
= 0, psym
= abfd
->outsymbols
; i
< count
; i
++, psym
++)
2478 coff_symbol_type
*csym
;
2479 combined_entry_type
*aux
;
2481 if (strcmp ((*psym
)->name
, current
->name
) != 0)
2484 csym
= coff_symbol_from (abfd
, *psym
);
2486 || csym
->native
== NULL
2487 || csym
->native
->u
.syment
.n_numaux
< 1
2488 || csym
->native
->u
.syment
.n_sclass
!= C_STAT
2489 || csym
->native
->u
.syment
.n_type
!= T_NULL
)
2492 /* Here *PSYM is the section symbol for CURRENT. */
2494 /* We don't touch the x_checksum field. The
2495 x_associated field is not currently supported. */
2497 aux
= csym
->native
+ 1;
2498 switch (current
->flags
& SEC_LINK_DUPLICATES
)
2500 case SEC_LINK_DUPLICATES_DISCARD
:
2501 aux
->u
.auxent
.x_scn
.x_comdat
= IMAGE_COMDAT_SELECT_ANY
;
2504 case SEC_LINK_DUPLICATES_ONE_ONLY
:
2505 aux
->u
.auxent
.x_scn
.x_comdat
=
2506 IMAGE_COMDAT_SELECT_NODUPLICATES
;
2509 case SEC_LINK_DUPLICATES_SAME_SIZE
:
2510 aux
->u
.auxent
.x_scn
.x_comdat
=
2511 IMAGE_COMDAT_SELECT_SAME_SIZE
;
2514 case SEC_LINK_DUPLICATES_SAME_CONTENTS
:
2515 aux
->u
.auxent
.x_scn
.x_comdat
=
2516 IMAGE_COMDAT_SELECT_EXACT_MATCH
;
2521 #endif /* COFF_WITH_PE */
2525 /* XCOFF handles overflows in the reloc and line number count fields
2526 by creating a new section header to hold the correct values. */
2527 for (current
= abfd
->sections
; current
!= NULL
; current
= current
->next
)
2529 if (current
->reloc_count
>= 0xffff || current
->lineno_count
>= 0xffff)
2531 struct internal_scnhdr scnhdr
;
2534 internal_f
.f_nscns
++;
2535 strncpy (&(scnhdr
.s_name
[0]), current
->name
, 8);
2536 scnhdr
.s_paddr
= current
->reloc_count
;
2537 scnhdr
.s_vaddr
= current
->lineno_count
;
2539 scnhdr
.s_scnptr
= 0;
2540 scnhdr
.s_relptr
= current
->rel_filepos
;
2541 scnhdr
.s_lnnoptr
= current
->line_filepos
;
2542 scnhdr
.s_nreloc
= current
->target_index
;
2543 scnhdr
.s_nlnno
= current
->target_index
;
2544 scnhdr
.s_flags
= STYP_OVRFLO
;
2545 if (coff_swap_scnhdr_out (abfd
, &scnhdr
, &buff
) == 0
2546 || bfd_write ((PTR
) &buff
, 1, SCNHSZ
, abfd
) != SCNHSZ
)
2552 /* OK, now set up the filehdr... */
2554 /* Don't include the internal abs section in the section count */
2557 We will NOT put a fucking timestamp in the header here. Every time you
2558 put it back, I will come in and take it out again. I'm sorry. This
2559 field does not belong here. We fill it with a 0 so it compares the
2560 same but is not a reasonable time. -- gnu@cygnus.com
2562 internal_f
.f_timdat
= 0;
2564 internal_f
.f_flags
= 0;
2566 if (abfd
->flags
& EXEC_P
)
2567 internal_f
.f_opthdr
= AOUTSZ
;
2570 internal_f
.f_opthdr
= 0;
2572 if (xcoff_data (abfd
)->full_aouthdr
)
2573 internal_f
.f_opthdr
= AOUTSZ
;
2575 internal_f
.f_opthdr
= SMALL_AOUTSZ
;
2580 internal_f
.f_flags
|= F_RELFLG
;
2582 internal_f
.f_flags
|= F_LNNO
;
2583 if (abfd
->flags
& EXEC_P
)
2584 internal_f
.f_flags
|= F_EXEC
;
2586 /* FIXME: this is wrong for PPC_PE! */
2587 if (bfd_little_endian (abfd
))
2588 internal_f
.f_flags
|= F_AR32WR
;
2590 internal_f
.f_flags
|= F_AR32W
;
2593 FIXME, should do something about the other byte orders and
2598 if ((abfd
->flags
& DYNAMIC
) != 0)
2599 internal_f
.f_flags
|= F_SHROBJ
;
2600 if (bfd_get_section_by_name (abfd
, _LOADER
) != NULL
)
2601 internal_f
.f_flags
|= F_DYNLOAD
;
2604 memset (&internal_a
, 0, sizeof internal_a
);
2606 /* Set up architecture-dependent stuff */
2609 unsigned int magic
= 0;
2610 unsigned short flags
= 0;
2611 coff_set_flags (abfd
, &magic
, &flags
);
2612 internal_f
.f_magic
= magic
;
2613 internal_f
.f_flags
|= flags
;
2614 /* ...and the "opt"hdr... */
2617 #ifdef ULTRA3 /* NYU's machine */
2618 /* FIXME: This is a bogus check. I really want to see if there
2619 * is a .shbss or a .shdata section, if so then set the magic
2620 * number to indicate a shared data executable.
2622 if (internal_f
.f_nscns
>= 7)
2623 internal_a
.magic
= SHMAGIC
; /* Shared magic */
2626 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
2627 #define __A_MAGIC_SET__
2630 /* FIXME: What are the a.out magic numbers for the i860? */
2631 internal_a
.magic
= 0;
2632 #define __A_MAGIC_SET__
2635 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
2636 #define __A_MAGIC_SET__
2639 #define __A_MAGIC_SET__
2640 internal_a
.magic
= PAGEMAGICBCS
;
2644 #define __A_MAGIC_SET__
2645 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2648 #if defined(M68) || defined(WE32K) || defined(M68K)
2649 #define __A_MAGIC_SET__
2651 internal_a
.magic
= LYNXCOFFMAGIC
;
2653 #if defined(TARG_AUX)
2654 internal_a
.magic
= (abfd
->flags
& D_PAGED
? PAGEMAGICPEXECPAGED
:
2655 abfd
->flags
& WP_TEXT
? PAGEMAGICPEXECSWAPPED
:
2656 PAGEMAGICEXECSWAPPED
);
2658 #if defined (PAGEMAGICPEXECPAGED)
2659 internal_a
.magic
= PAGEMAGICPEXECPAGED
;
2661 #endif /* TARG_AUX */
2663 #endif /* M68 || WE32K || M68K */
2666 #define __A_MAGIC_SET__
2667 internal_a
.magic
= ZMAGIC
;
2670 #define __A_MAGIC_SET__
2671 internal_a
.magic
= IMAGE_NT_OPTIONAL_HDR_MAGIC
;
2674 #define __A_MAGIC_SET__
2676 internal_a
.magic
= LYNXCOFFMAGIC
;
2678 internal_a
.magic
= ZMAGIC
;
2683 #define __A_MAGIC_SET__
2685 internal_a
.magic
= LYNXCOFFMAGIC
;
2690 #define __A_MAGIC_SET__
2691 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2692 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2693 RS6K_AOUTHDR_OMAGIC
;
2696 #ifndef __A_MAGIC_SET__
2697 #include "Your aouthdr magic number is not being set!"
2699 #undef __A_MAGIC_SET__
2703 /* FIXME: Does anybody ever set this to another value? */
2704 internal_a
.vstamp
= 0;
2706 /* Now should write relocs, strings, syms */
2707 obj_sym_filepos (abfd
) = sym_base
;
2709 if (bfd_get_symcount (abfd
) != 0)
2713 if (!coff_add_missing_symbols (abfd
))
2716 if (!coff_renumber_symbols (abfd
, &firstundef
))
2718 coff_mangle_symbols (abfd
);
2719 if (! coff_write_symbols (abfd
))
2721 if (! coff_write_linenumbers (abfd
))
2723 if (! coff_write_relocs (abfd
, firstundef
))
2726 #ifdef COFF_IMAGE_WITH_PE
2728 else if ((abfd
->flags
& EXEC_P
) != 0)
2732 /* PowerPC PE appears to require that all executable files be
2733 rounded up to the page size. */
2736 BFD_ALIGN (sym_base
, COFF_PAGE_SIZE
) - 1,
2738 || bfd_write (&b
, 1, 1, abfd
) != 1)
2744 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2745 backend linker, and obj_raw_syment_count is not valid until after
2746 coff_write_symbols is called. */
2747 if (obj_raw_syment_count (abfd
) != 0)
2749 internal_f
.f_symptr
= sym_base
;
2751 /* AIX appears to require that F_RELFLG not be set if there are
2752 local symbols but no relocations. */
2753 internal_f
.f_flags
&=~ F_RELFLG
;
2758 internal_f
.f_symptr
= 0;
2759 internal_f
.f_flags
|= F_LSYMS
;
2764 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2765 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2769 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2770 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2774 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2775 if (internal_a
.bsize
&& bss_sec
->vma
< internal_a
.data_start
)
2776 internal_a
.data_start
= bss_sec
->vma
;
2779 internal_a
.entry
= bfd_get_start_address (abfd
);
2780 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2783 if (xcoff_data (abfd
)->full_aouthdr
)
2786 asection
*loader_sec
;
2788 internal_a
.vstamp
= 1;
2790 internal_a
.o_snentry
= xcoff_data (abfd
)->snentry
;
2791 if (internal_a
.o_snentry
== 0)
2792 internal_a
.entry
= (bfd_vma
) -1;
2794 if (text_sec
!= NULL
)
2796 internal_a
.o_sntext
= text_sec
->target_index
;
2797 internal_a
.o_algntext
= bfd_get_section_alignment (abfd
, text_sec
);
2801 internal_a
.o_sntext
= 0;
2802 internal_a
.o_algntext
= 0;
2804 if (data_sec
!= NULL
)
2806 internal_a
.o_sndata
= data_sec
->target_index
;
2807 internal_a
.o_algndata
= bfd_get_section_alignment (abfd
, data_sec
);
2811 internal_a
.o_sndata
= 0;
2812 internal_a
.o_algndata
= 0;
2814 loader_sec
= bfd_get_section_by_name (abfd
, ".loader");
2815 if (loader_sec
!= NULL
)
2816 internal_a
.o_snloader
= loader_sec
->target_index
;
2818 internal_a
.o_snloader
= 0;
2819 if (bss_sec
!= NULL
)
2820 internal_a
.o_snbss
= bss_sec
->target_index
;
2822 internal_a
.o_snbss
= 0;
2824 toc
= xcoff_data (abfd
)->toc
;
2825 internal_a
.o_toc
= toc
;
2826 internal_a
.o_sntoc
= xcoff_data (abfd
)->sntoc
;
2828 internal_a
.o_modtype
= xcoff_data (abfd
)->modtype
;
2829 if (xcoff_data (abfd
)->cputype
!= -1)
2830 internal_a
.o_cputype
= xcoff_data (abfd
)->cputype
;
2833 switch (bfd_get_arch (abfd
))
2835 case bfd_arch_rs6000
:
2836 internal_a
.o_cputype
= 4;
2838 case bfd_arch_powerpc
:
2839 if (bfd_get_mach (abfd
) == 0)
2840 internal_a
.o_cputype
= 3;
2842 internal_a
.o_cputype
= 1;
2848 internal_a
.o_maxstack
= xcoff_data (abfd
)->maxstack
;
2849 internal_a
.o_maxdata
= xcoff_data (abfd
)->maxdata
;
2853 /* now write them */
2854 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2858 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) buff
);
2859 if (bfd_write ((PTR
) buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2862 if (abfd
->flags
& EXEC_P
)
2864 /* Note that peicode.h fills in a PEAOUTHDR, not an AOUTHDR.
2865 include/coff/pe.h sets AOUTSZ == sizeof(PEAOUTHDR)) */
2867 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) buff
);
2868 if (bfd_write ((PTR
) buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2877 /* XCOFF seems to always write at least a small a.out header. */
2878 coff_swap_aouthdr_out (abfd
, (PTR
) &internal_a
, (PTR
) &buff
);
2879 if (xcoff_data (abfd
)->full_aouthdr
)
2882 size
= SMALL_AOUTSZ
;
2883 if (bfd_write ((PTR
) &buff
, 1, size
, abfd
) != size
)
2892 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2897 bfd_size_type count
;
2899 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
2900 coff_compute_section_file_positions (abfd
);
2904 /* The physical address field of a .lib section is used to hold the
2905 number of shared libraries in the section. This code counts the
2906 number of sections being written, and increments the lma field
2909 I have found no documentation on the contents of this section.
2910 Experimentation indicates that the section contains zero or more
2911 records, each of which has the following structure:
2913 - a (four byte) word holding the length of this record, in words,
2914 - a word that always seems to be set to "2",
2915 - the path to a shared library, null-terminated and then padded
2916 to a whole word boundary.
2918 bfd_assert calls have been added to alert if an attempt is made
2919 to write a section which doesn't follow these assumptions. The
2920 code has been tested on ISC 4.1 by me, and on SCO by Robert Lipe
2921 <robertl@arnet.com> (Thanks!).
2923 Gvran Uddeborg <gvran@uddeborg.pp.se> */
2925 if (strcmp (section
->name
, _LIB
) == 0)
2927 bfd_byte
*rec
, *recend
;
2929 rec
= (bfd_byte
*) location
;
2930 recend
= rec
+ count
;
2931 while (rec
< recend
)
2934 rec
+= bfd_get_32 (abfd
, rec
) * 4;
2937 BFD_ASSERT (rec
== recend
);
2942 /* Don't write out bss sections - one way to do this is to
2943 see if the filepos has not been set. */
2944 if (section
->filepos
== 0)
2947 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
2952 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
2958 coff_close_and_cleanup (abfd
)
2961 if (!bfd_read_p (abfd
))
2962 switch (abfd
->format
)
2965 if (!_bfd_write_archive_contents (abfd
))
2969 if (!coff_write_object_contents (abfd
))
2973 bfd_set_error (bfd_error_invalid_operation
);
2977 /* We depend on bfd_close to free all the memory on the obstack. */
2978 /* FIXME if bfd_release is not using obstacks! */
2985 buy_and_read (abfd
, where
, seek_direction
, size
)
2991 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
2994 if (bfd_seek (abfd
, where
, seek_direction
) != 0
2995 || bfd_read (area
, 1, size
, abfd
) != size
)
2998 } /* buy_and_read() */
3004 Creating the linenumber table is done by reading in the entire
3005 coff linenumber table, and creating another table for internal use.
3007 A coff linenumber table is structured so that each function
3008 is marked as having a line number of 0. Each line within the
3009 function is an offset from the first line in the function. The
3010 base of the line number information for the table is stored in
3011 the symbol associated with the function.
3013 The information is copied from the external to the internal
3014 table, and each symbol which marks a function is marked by
3017 How does this work ?
3022 coff_slurp_line_table (abfd
, asect
)
3026 LINENO
*native_lineno
;
3027 alent
*lineno_cache
;
3029 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
3031 native_lineno
= (LINENO
*) buy_and_read (abfd
,
3032 asect
->line_filepos
,
3035 asect
->lineno_count
));
3037 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
3038 if (lineno_cache
== NULL
)
3042 unsigned int counter
= 0;
3043 alent
*cache_ptr
= lineno_cache
;
3044 LINENO
*src
= native_lineno
;
3046 while (counter
< asect
->lineno_count
)
3048 struct internal_lineno dst
;
3049 coff_swap_lineno_in (abfd
, src
, &dst
);
3050 cache_ptr
->line_number
= dst
.l_lnno
;
3052 if (cache_ptr
->line_number
== 0)
3054 coff_symbol_type
*sym
=
3055 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
3056 + obj_raw_syments (abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
3057 cache_ptr
->u
.sym
= (asymbol
*) sym
;
3058 if (sym
->lineno
!= NULL
)
3060 (*_bfd_error_handler
)
3061 ("%s: warning: duplicate line number information for `%s'",
3062 bfd_get_filename (abfd
),
3063 bfd_asymbol_name (&sym
->symbol
));
3065 sym
->lineno
= cache_ptr
;
3069 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
3070 - bfd_section_vma (abfd
, asect
);
3071 } /* If no linenumber expect a symbol index */
3077 cache_ptr
->line_number
= 0;
3080 asect
->lineno
= lineno_cache
;
3081 /* FIXME, free native_lineno here, or use alloca or something. */
3086 coff_slurp_symbol_table (abfd
)
3089 combined_entry_type
*native_symbols
;
3090 coff_symbol_type
*cached_area
;
3091 unsigned int *table_ptr
;
3093 unsigned int number_of_symbols
= 0;
3095 if (obj_symbols (abfd
))
3098 /* Read in the symbol table */
3099 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
3104 /* Allocate enough room for all the symbols in cached form */
3105 cached_area
= ((coff_symbol_type
*)
3107 (obj_raw_syment_count (abfd
)
3108 * sizeof (coff_symbol_type
))));
3110 if (cached_area
== NULL
)
3112 table_ptr
= ((unsigned int *)
3114 (obj_raw_syment_count (abfd
)
3115 * sizeof (unsigned int))));
3117 if (table_ptr
== NULL
)
3121 coff_symbol_type
*dst
= cached_area
;
3122 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
3123 unsigned int this_index
= 0;
3124 while (this_index
< last_native_index
)
3126 combined_entry_type
*src
= native_symbols
+ this_index
;
3127 table_ptr
[this_index
] = number_of_symbols
;
3128 dst
->symbol
.the_bfd
= abfd
;
3130 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
3131 /* We use the native name field to point to the cached field. */
3132 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
3133 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
3134 src
->u
.syment
.n_scnum
);
3135 dst
->symbol
.flags
= 0;
3136 dst
->done_lineno
= false;
3138 switch (src
->u
.syment
.n_sclass
)
3143 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
3144 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
3145 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
3147 /* Fall through to next case */
3156 /* PE uses storage class 0x68 to denote a section symbol */
3158 /* PE uses storage class 0x67 for a weak external symbol. */
3161 if ((src
->u
.syment
.n_scnum
) == 0)
3163 if ((src
->u
.syment
.n_value
) == 0)
3165 dst
->symbol
.section
= bfd_und_section_ptr
;
3166 dst
->symbol
.value
= 0;
3170 dst
->symbol
.section
= bfd_com_section_ptr
;
3171 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3176 /* Base the value as an index from the base of the
3179 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
3180 dst
->symbol
.value
= (src
->u
.syment
.n_value
3181 - dst
->symbol
.section
->vma
);
3183 if (ISFCN ((src
->u
.syment
.n_type
)))
3185 /* A function ext does not go at the end of a
3187 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
3192 /* A C_HIDEXT symbol is not global. */
3193 if (src
->u
.syment
.n_sclass
== C_HIDEXT
)
3194 dst
->symbol
.flags
= BSF_LOCAL
;
3195 /* A symbol with a csect entry should not go at the end. */
3196 if (src
->u
.syment
.n_numaux
> 0)
3197 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
3201 if (src
->u
.syment
.n_sclass
== C_NT_WEAK
)
3202 dst
->symbol
.flags
= BSF_WEAK
;
3207 case C_STAT
: /* static */
3209 case C_LEAFSTAT
: /* static leaf procedure */
3211 case C_LABEL
: /* label */
3212 if (src
->u
.syment
.n_scnum
== -2)
3213 dst
->symbol
.flags
= BSF_DEBUGGING
;
3215 dst
->symbol
.flags
= BSF_LOCAL
;
3217 /* Base the value as an index from the base of the
3218 section, if there is one. */
3219 if (dst
->symbol
.section
)
3220 dst
->symbol
.value
= (src
->u
.syment
.n_value
3221 - dst
->symbol
.section
->vma
);
3223 dst
->symbol
.value
= src
->u
.syment
.n_value
;
3226 case C_MOS
: /* member of structure */
3227 case C_EOS
: /* end of structure */
3228 #ifdef NOTDEF /* C_AUTOARG has the same value */
3230 case C_GLBLREG
: /* A29k-specific storage class */
3233 case C_REGPARM
: /* register parameter */
3234 case C_REG
: /* register variable */
3236 case C_AUTOARG
: /* 960-specific storage class */
3238 case C_TPDEF
: /* type definition */
3240 case C_AUTO
: /* automatic variable */
3241 case C_FIELD
: /* bit field */
3242 case C_ENTAG
: /* enumeration tag */
3243 case C_MOE
: /* member of enumeration */
3244 case C_MOU
: /* member of union */
3245 case C_UNTAG
: /* union tag */
3246 dst
->symbol
.flags
= BSF_DEBUGGING
;
3247 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3250 case C_FILE
: /* file name */
3251 case C_STRTAG
: /* structure tag */
3266 dst
->symbol
.flags
= BSF_DEBUGGING
;
3267 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3271 case C_BINCL
: /* beginning of include file */
3272 case C_EINCL
: /* ending of include file */
3273 /* The value is actually a pointer into the line numbers
3274 of the file. We locate the line number entry, and
3275 set the section to the section which contains it, and
3276 the value to the index in that section. */
3280 dst
->symbol
.flags
= BSF_DEBUGGING
;
3281 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
3282 if (sec
->line_filepos
<= (file_ptr
) src
->u
.syment
.n_value
3283 && ((file_ptr
) (sec
->line_filepos
3284 + sec
->lineno_count
* LINESZ
)
3285 > (file_ptr
) src
->u
.syment
.n_value
))
3288 dst
->symbol
.value
= 0;
3291 dst
->symbol
.section
= sec
;
3292 dst
->symbol
.value
= ((src
->u
.syment
.n_value
3293 - sec
->line_filepos
)
3301 dst
->symbol
.flags
= BSF_DEBUGGING
;
3303 /* The value is actually a symbol index. Save a pointer
3304 to the symbol instead of the index. FIXME: This
3305 should use a union. */
3306 src
->u
.syment
.n_value
=
3307 (long) (native_symbols
+ src
->u
.syment
.n_value
);
3308 dst
->symbol
.value
= src
->u
.syment
.n_value
;
3313 case C_BLOCK
: /* ".bb" or ".eb" */
3314 case C_FCN
: /* ".bf" or ".ef" */
3315 case C_EFCN
: /* physical end of function */
3316 dst
->symbol
.flags
= BSF_LOCAL
;
3317 /* Base the value as an index from the base of the
3319 dst
->symbol
.value
= (src
->u
.syment
.n_value
3320 - dst
->symbol
.section
->vma
);
3324 case C_EXTDEF
: /* external definition */
3325 case C_ULABEL
: /* undefined label */
3326 case C_USTATIC
: /* undefined static */
3327 #ifndef COFF_WITH_PE
3328 /* C_LINE in regular coff is 0x68. NT has taken over this storage
3329 class to represent a section symbol */
3330 case C_LINE
: /* line # reformatted as symbol table entry */
3331 /* NT uses 0x67 for a weak symbol, not C_ALIAS. */
3332 case C_ALIAS
: /* duplicate tag */
3334 case C_HIDDEN
: /* ext symbol in dmert public lib */
3336 (*_bfd_error_handler
)
3337 ("%s: Unrecognized storage class %d for %s symbol `%s'",
3338 bfd_get_filename (abfd
), src
->u
.syment
.n_sclass
,
3339 dst
->symbol
.section
->name
, dst
->symbol
.name
);
3340 dst
->symbol
.flags
= BSF_DEBUGGING
;
3341 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
3345 /* BFD_ASSERT(dst->symbol.flags != 0);*/
3349 dst
->symbol
.udata
.i
= 0;
3350 dst
->lineno
= (alent
*) NULL
;
3351 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
3353 number_of_symbols
++;
3354 } /* walk the native symtab */
3355 } /* bfdize the native symtab */
3357 obj_symbols (abfd
) = cached_area
;
3358 obj_raw_syments (abfd
) = native_symbols
;
3360 bfd_get_symcount (abfd
) = number_of_symbols
;
3361 obj_convert (abfd
) = table_ptr
;
3362 /* Slurp the line tables for each section too */
3368 coff_slurp_line_table (abfd
, p
);
3373 } /* coff_slurp_symbol_table() */
3375 /* Check whether a symbol is globally visible. This is used by the
3376 COFF backend linker code in cofflink.c, since a couple of targets
3377 have globally visible symbols which are not class C_EXT. This
3378 function need not handle the case of n_class == C_EXT. */
3380 #undef OTHER_GLOBAL_CLASS
3383 #define OTHER_GLOBAL_CLASS C_LEAFEXT
3387 #define OTHER_GLOBAL_CLASS C_SECTION
3390 #ifdef OTHER_GLOBAL_CLASS
3393 coff_sym_is_global (abfd
, syment
)
3395 struct internal_syment
*syment
;
3397 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
3402 #undef OTHER_GLOBAL_CLASS
3404 #else /* ! defined (OTHER_GLOBAL_CLASS) */
3406 /* sym_is_global should not be defined if it has nothing to do. */
3408 #define coff_sym_is_global 0
3410 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
3416 Coff relocations are easily transformed into the internal BFD form
3419 Reading a coff relocation table is done in the following stages:
3421 o Read the entire coff relocation table into memory.
3423 o Process each relocation in turn; first swap it from the
3424 external to the internal form.
3426 o Turn the symbol referenced in the relocation's symbol index
3427 into a pointer into the canonical symbol table.
3428 This table is the same as the one returned by a call to
3429 @code{bfd_canonicalize_symtab}. The back end will call that
3430 routine and save the result if a canonicalization hasn't been done.
3432 o The reloc index is turned into a pointer to a howto
3433 structure, in a back end specific way. For instance, the 386
3434 and 960 use the @code{r_type} to directly produce an index
3435 into a howto table vector; the 88k subtracts a number from the
3436 @code{r_type} field and creates an addend field.
3442 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
3444 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
3445 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
3446 coffsym = (obj_symbols (abfd) \
3447 + (cache_ptr->sym_ptr_ptr - symbols)); \
3449 coffsym = coff_symbol_from (abfd, ptr); \
3450 if (coffsym != (coff_symbol_type *) NULL \
3451 && coffsym->native->u.syment.n_scnum == 0) \
3452 cache_ptr->addend = 0; \
3453 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
3454 && ptr->section != (asection *) NULL) \
3455 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
3457 cache_ptr->addend = 0; \
3462 coff_slurp_reloc_table (abfd
, asect
, symbols
)
3467 RELOC
*native_relocs
;
3468 arelent
*reloc_cache
;
3473 if (asect
->relocation
)
3475 if (asect
->reloc_count
== 0)
3477 if (asect
->flags
& SEC_CONSTRUCTOR
)
3479 if (!coff_slurp_symbol_table (abfd
))
3482 (RELOC
*) buy_and_read (abfd
,
3486 asect
->reloc_count
));
3487 reloc_cache
= (arelent
*)
3488 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
3490 if (reloc_cache
== NULL
)
3494 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
3496 #ifdef RELOC_PROCESSING
3497 struct internal_reloc dst
;
3498 struct external_reloc
*src
;
3500 cache_ptr
= reloc_cache
+ idx
;
3501 src
= native_relocs
+ idx
;
3502 coff_swap_reloc_in (abfd
, src
, &dst
);
3504 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
3506 struct internal_reloc dst
;
3508 struct external_reloc
*src
;
3510 cache_ptr
= reloc_cache
+ idx
;
3511 src
= native_relocs
+ idx
;
3513 coff_swap_reloc_in (abfd
, src
, &dst
);
3516 cache_ptr
->address
= dst
.r_vaddr
;
3518 if (dst
.r_symndx
!= -1)
3520 /* @@ Should never be greater than count of symbols! */
3521 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
3523 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[dst
.r_symndx
];
3524 ptr
= *(cache_ptr
->sym_ptr_ptr
);
3528 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
3532 /* The symbols definitions that we have read in have been
3533 relocated as if their sections started at 0. But the offsets
3534 refering to the symbols in the raw data have not been
3535 modified, so we have to have a negative addend to compensate.
3537 Note that symbols which used to be common must be left alone */
3539 /* Calculate any reloc addend by looking at the symbol */
3540 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
3542 cache_ptr
->address
-= asect
->vma
;
3543 /* !! cache_ptr->section = (asection *) NULL;*/
3545 /* Fill in the cache_ptr->howto field from dst.r_type */
3546 RTYPE2HOWTO (cache_ptr
, &dst
);
3551 asect
->relocation
= reloc_cache
;
3555 #ifndef coff_rtype_to_howto
3558 /* Get the howto structure for a reloc. This is only used if the file
3559 including this one defines coff_relocate_section to be
3560 _bfd_coff_generic_relocate_section, so it is OK if it does not
3561 always work. It is the responsibility of the including file to
3562 make sure it is reasonable if it is needed. */
3564 static reloc_howto_type
*coff_rtype_to_howto
3565 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
3566 struct coff_link_hash_entry
*, struct internal_syment
*,
3570 static reloc_howto_type
*
3571 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
3574 struct internal_reloc
*rel
;
3575 struct coff_link_hash_entry
*h
;
3576 struct internal_syment
*sym
;
3581 RTYPE2HOWTO (&genrel
, rel
);
3582 return genrel
.howto
;
3585 #else /* ! defined (RTYPE2HOWTO) */
3587 #define coff_rtype_to_howto NULL
3589 #endif /* ! defined (RTYPE2HOWTO) */
3590 #endif /* ! defined (coff_rtype_to_howto) */
3592 /* This is stupid. This function should be a boolean predicate. */
3594 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
3600 arelent
*tblptr
= section
->relocation
;
3601 unsigned int count
= 0;
3604 if (section
->flags
& SEC_CONSTRUCTOR
)
3606 /* this section has relocs made up by us, they are not in the
3607 file, so take them out of their chain and place them into
3608 the data area provided */
3609 arelent_chain
*chain
= section
->constructor_chain
;
3610 for (count
= 0; count
< section
->reloc_count
; count
++)
3612 *relptr
++ = &chain
->relent
;
3613 chain
= chain
->next
;
3619 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
3622 tblptr
= section
->relocation
;
3624 for (; count
++ < section
->reloc_count
;)
3625 *relptr
++ = tblptr
++;
3630 return section
->reloc_count
;
3635 coff_sym_filepos (abfd
)
3638 return obj_sym_filepos (abfd
);
3642 #ifndef coff_reloc16_estimate
3643 #define coff_reloc16_estimate dummy_reloc16_estimate
3646 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
3648 asection
*input_section
;
3650 unsigned int shrink
;
3651 struct bfd_link_info
*link_info
;
3658 #ifndef coff_reloc16_extra_cases
3659 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3660 /* This works even if abort is not declared in any header file. */
3662 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
3665 struct bfd_link_info
*link_info
;
3666 struct bfd_link_order
*link_order
;
3669 unsigned int *src_ptr
;
3670 unsigned int *dst_ptr
;
3676 /* If coff_relocate_section is defined, we can use the optimized COFF
3677 backend linker. Otherwise we must continue to use the old linker. */
3678 #ifdef coff_relocate_section
3679 #ifndef coff_bfd_link_hash_table_create
3680 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3682 #ifndef coff_bfd_link_add_symbols
3683 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3685 #ifndef coff_bfd_final_link
3686 #define coff_bfd_final_link _bfd_coff_final_link
3688 #else /* ! defined (coff_relocate_section) */
3689 #define coff_relocate_section NULL
3690 #ifndef coff_bfd_link_hash_table_create
3691 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3693 #ifndef coff_bfd_link_add_symbols
3694 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3696 #define coff_bfd_final_link _bfd_generic_final_link
3697 #endif /* ! defined (coff_relocate_section) */
3698 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3700 #ifndef coff_start_final_link
3701 #define coff_start_final_link NULL
3704 #ifndef coff_adjust_symndx
3705 #define coff_adjust_symndx NULL
3708 #ifndef coff_link_add_one_symbol
3709 #define coff_link_add_one_symbol _bfd_generic_link_add_one_symbol
3712 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
3714 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
3715 coff_swap_aux_out
, coff_swap_sym_out
,
3716 coff_swap_lineno_out
, coff_swap_reloc_out
,
3717 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
3718 coff_swap_scnhdr_out
,
3719 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
3720 #ifdef COFF_LONG_FILENAMES
3725 #ifdef COFF_LONG_SECTION_NAMES
3730 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
3731 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
3732 coff_mkobject_hook
, styp_to_sec_flags
, coff_set_alignment_hook
,
3733 coff_slurp_symbol_table
, symname_in_debug_hook
, coff_pointerize_aux_hook
,
3734 coff_print_aux
, coff_reloc16_extra_cases
, coff_reloc16_estimate
,
3735 coff_sym_is_global
, coff_compute_section_file_positions
,
3736 coff_start_final_link
, coff_relocate_section
, coff_rtype_to_howto
,
3737 coff_adjust_symndx
, coff_link_add_one_symbol
3740 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3741 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3742 #define coff_get_section_contents _bfd_generic_get_section_contents
3744 #ifndef coff_bfd_copy_private_symbol_data
3745 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3748 #ifndef coff_bfd_copy_private_section_data
3749 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3752 #ifndef coff_bfd_copy_private_bfd_data
3753 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3756 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3757 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3759 #ifndef coff_bfd_print_private_bfd_data
3760 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3763 #ifndef coff_bfd_is_local_label
3764 #define coff_bfd_is_local_label bfd_generic_is_local_label
3766 #ifndef coff_read_minisymbols
3767 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3769 #ifndef coff_minisymbol_to_symbol
3770 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3773 /* The reloc lookup routine must be supplied by each individual COFF
3775 #ifndef coff_bfd_reloc_type_lookup
3776 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3779 #ifndef coff_bfd_get_relocated_section_contents
3780 #define coff_bfd_get_relocated_section_contents \
3781 bfd_generic_get_relocated_section_contents
3783 #ifndef coff_bfd_relax_section
3784 #define coff_bfd_relax_section bfd_generic_relax_section