1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 91, 92, 93, 94, 1995 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_slurp_symbol_table. *}
269 .unsigned int fix_scnlen : 1;
271 . {* The container for the symbol structure as read and translated
275 . union internal_auxent auxent;
276 . struct internal_syment syment;
278 .} combined_entry_type;
281 .{* Each canonical asymbol really looks like this: *}
283 .typedef struct coff_symbol_struct
285 . {* The actual symbol which the rest of BFD works with *}
288 . {* A pointer to the hidden information for this symbol *}
289 .combined_entry_type *native;
291 . {* A pointer to the linenumber information for this symbol *}
292 .struct lineno_cache_entry *lineno;
294 . {* Have the line numbers been relocated yet ? *}
295 .boolean done_lineno;
301 #ifdef COFF_IMAGE_WITH_PE
304 #include "coffswap.h"
308 /* void warning(); */
311 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
312 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
313 * NOTE: If you add to/change this routine, you should mirror the changes
314 * in styp_to_sec_flags().
317 sec_to_styp_flags (sec_name
, sec_flags
)
318 CONST
char *sec_name
;
323 if (!strcmp (sec_name
, _TEXT
))
325 styp_flags
= STYP_TEXT
;
327 else if (!strcmp (sec_name
, _DATA
))
329 styp_flags
= STYP_DATA
;
332 else if (!strcmp (sec_name
, ".data2"))
334 styp_flags
= STYP_DATA
;
335 #endif /* TWO_DATA_SECS */
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
;
377 /* Try and figure out what it should be */
378 else if (sec_flags
& SEC_CODE
)
380 styp_flags
= STYP_TEXT
;
382 else if (sec_flags
& SEC_DATA
)
384 styp_flags
= STYP_DATA
;
386 else if (sec_flags
& SEC_READONLY
)
388 #ifdef STYP_LIT /* 29k readonly text/data section */
389 styp_flags
= STYP_LIT
;
391 styp_flags
= STYP_TEXT
;
392 #endif /* STYP_LIT */
394 else if (sec_flags
& SEC_LOAD
)
396 styp_flags
= STYP_TEXT
;
398 else if (sec_flags
& SEC_ALLOC
)
400 styp_flags
= STYP_BSS
;
404 if ((sec_flags
& (SEC_NEVER_LOAD
| SEC_COFF_SHARED_LIBRARY
)) != 0)
405 styp_flags
|= STYP_NOLOAD
;
411 * Return a word with SEC_* flags set to represent the incoming
412 * STYP_* flags (from scnhdr.s_flags). The inverse of this
413 * function is sec_to_styp_flags().
414 * NOTE: If you add to/change this routine, you should mirror the changes
415 * in sec_to_styp_flags().
418 styp_to_sec_flags (abfd
, hdr
, name
)
423 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
424 long styp_flags
= internal_s
->s_flags
;
425 flagword sec_flags
= 0;
428 if (styp_flags
& STYP_NOLOAD
)
430 sec_flags
|= SEC_NEVER_LOAD
;
432 #endif /* STYP_NOLOAD */
434 /* For 386 COFF, at least, an unloadable text or data section is
435 actually a shared library section. */
436 if (styp_flags
& STYP_TEXT
)
438 if (sec_flags
& SEC_NEVER_LOAD
)
439 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
441 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
443 else if (styp_flags
& STYP_DATA
)
445 if (sec_flags
& SEC_NEVER_LOAD
)
446 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
448 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
450 else if (styp_flags
& STYP_BSS
)
452 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
453 if (sec_flags
& SEC_NEVER_LOAD
)
454 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
457 sec_flags
|= SEC_ALLOC
;
459 else if (styp_flags
& STYP_INFO
)
461 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
462 defined. coff_compute_section_file_positions uses
463 COFF_PAGE_SIZE to ensure that the low order bits of the
464 section VMA and the file offset match. If we don't know
465 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
466 and demand page loading of the file will fail. */
467 #ifdef COFF_PAGE_SIZE
468 sec_flags
|= SEC_DEBUGGING
;
471 else if (strcmp (name
, _TEXT
) == 0)
473 if (sec_flags
& SEC_NEVER_LOAD
)
474 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
476 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
478 else if (strcmp (name
, _DATA
) == 0
480 || strcmp (name
, ".data2") == 0
484 if (sec_flags
& SEC_NEVER_LOAD
)
485 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
487 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
489 else if (strcmp (name
, _BSS
) == 0)
491 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
492 if (sec_flags
& SEC_NEVER_LOAD
)
493 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
496 sec_flags
|= SEC_ALLOC
;
498 else if (strcmp (name
, ".debug") == 0
500 || strcmp (name
, _COMMENT
) == 0
502 || strncmp (name
, ".stab", 5) == 0)
504 #ifdef COFF_PAGE_SIZE
505 sec_flags
|= SEC_DEBUGGING
;
509 else if (strcmp (name
, _LIB
) == 0)
513 else if (strcmp (name
, _LIT
) == 0)
515 sec_flags
= SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
;
520 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
523 #ifdef STYP_LIT /* A29k readonly text/data section type */
524 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
526 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
528 #endif /* STYP_LIT */
529 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
530 if (styp_flags
& STYP_OTHER_LOAD
)
532 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
534 #endif /* STYP_SDATA */
539 #define get_index(symbol) ((symbol)->udata.i)
543 bfd_coff_backend_data
547 Special entry points for gdb to swap in coff symbol table parts:
550 . void (*_bfd_coff_swap_aux_in) PARAMS ((
559 . void (*_bfd_coff_swap_sym_in) PARAMS ((
564 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
570 Special entry points for gas to swap out coff parts:
572 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
581 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
586 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
591 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
596 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
601 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
606 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
612 Special entry points for generic COFF routines to call target
613 dependent COFF routines:
615 . unsigned int _bfd_filhsz;
616 . unsigned int _bfd_aoutsz;
617 . unsigned int _bfd_scnhsz;
618 . unsigned int _bfd_symesz;
619 . unsigned int _bfd_auxesz;
620 . unsigned int _bfd_relsz;
621 . unsigned int _bfd_linesz;
622 . boolean _bfd_coff_long_filenames;
623 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
627 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
631 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
635 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
639 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
641 . PTR internal_filehdr));
642 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
644 . PTR internal_filehdr));
645 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
647 . PTR internal_filehdr,
648 . PTR internal_aouthdr));
649 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
651 . PTR internal_scnhdr,
652 . const char *name));
653 . asection *(*_bfd_make_section_hook) PARAMS ((
656 . void (*_bfd_set_alignment_hook) PARAMS ((
659 . PTR internal_scnhdr));
660 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
662 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
664 . struct internal_syment *sym));
665 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
667 . struct bfd_link_info *link_info,
668 . struct bfd_link_order *link_order,
671 . unsigned int *src_ptr,
672 . unsigned int *dst_ptr));
673 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
675 . asection *input_section,
677 . unsigned int shrink,
678 . struct bfd_link_info *link_info));
679 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
681 . struct internal_syment *));
682 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
684 . boolean (*_bfd_coff_start_final_link) PARAMS ((
686 . struct bfd_link_info *info));
687 . boolean (*_bfd_coff_relocate_section) PARAMS ((
689 . struct bfd_link_info *info,
691 . asection *input_section,
692 . bfd_byte *contents,
693 . struct internal_reloc *relocs,
694 . struct internal_syment *syms,
695 . asection **sections));
696 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
699 . struct internal_reloc *rel,
700 . struct coff_link_hash_entry *h,
701 . struct internal_syment *sym,
702 . bfd_vma *addendp));
703 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
705 . struct bfd_link_info *info,
708 . struct internal_reloc *reloc,
709 . boolean *adjustedp));
711 .} bfd_coff_backend_data;
713 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
715 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
716 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
718 .#define bfd_coff_swap_sym_in(a,e,i) \
719 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
721 .#define bfd_coff_swap_lineno_in(a,e,i) \
722 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
724 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
725 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
727 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
728 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
730 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
731 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
733 .#define bfd_coff_swap_sym_out(abfd, i,o) \
734 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
736 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
737 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
739 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
740 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
742 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
743 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
745 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
746 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
747 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
748 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
749 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
750 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
751 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
752 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
753 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
754 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
756 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
757 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
759 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
760 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
762 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
763 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
765 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
766 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
768 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
769 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
770 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
771 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
773 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
774 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
776 .#define bfd_coff_make_section_hook(abfd, name)\
777 . ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
779 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
780 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
782 .#define bfd_coff_slurp_symbol_table(abfd)\
783 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
785 .#define bfd_coff_symname_in_debug(abfd, sym)\
786 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
788 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
789 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
790 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
792 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
793 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
794 . (abfd, section, reloc, shrink, link_info))
796 .#define bfd_coff_sym_is_global(abfd, sym)\
797 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
800 .#define bfd_coff_compute_section_file_positions(abfd)\
801 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
804 .#define bfd_coff_start_final_link(obfd, info)\
805 . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
807 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
808 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
809 . (obfd, info, ibfd, o, con, rel, isyms, secs))
810 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
811 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
812 . (abfd, sec, rel, h, sym, addendp))
813 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
814 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
815 . (obfd, info, ibfd, sec, rel, adjustedp))
819 /* See whether the magic number matches. */
822 coff_bad_format_hook (abfd
, filehdr
)
826 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
828 if (BADMAG (*internal_f
))
831 /* if the optional header is NULL or not the correct size then
832 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
833 and Intel 960 readwrite headers (I960WRMAGIC) is that the
834 optional header is of a different size.
836 But the mips keeps extra stuff in it's opthdr, so dont check
840 #if defined(M88) || defined(I960)
841 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
849 coff_make_section_hook (abfd
, name
)
854 /* FIXME: This predates the call to bfd_make_section_anyway
855 in make_a_section_from_file, and can probably go away. */
856 /* On SCO a file created by the Microsoft assembler can have two
857 .data sections. We use .data2 for the second one. */
858 if (strcmp (name
, _DATA
) == 0)
859 return bfd_make_section (abfd
, ".data2");
861 return (asection
*) NULL
;
865 initialize a section structure with information peculiar to this
866 particular implementation of coff
870 coff_new_section_hook (abfd
, section
)
874 section
->alignment_power
= COFF_DEFAULT_SECTION_ALIGNMENT_POWER
;
876 /* Allocate aux records for section symbols, to store size and
879 @@ Shouldn't use constant multiplier here! */
880 coffsymbol (section
->symbol
)->native
=
881 (combined_entry_type
*) bfd_zalloc (abfd
,
882 sizeof (combined_entry_type
) * 10);
884 /* The .stab section must be aligned to 2**2 at most, because
885 otherwise there may be gaps in the section which gdb will not
886 know how to interpret. Examining the section name is a hack, but
887 that is also how gdb locates the section. We also align the
888 .stabstr section this way for backward compatibility, although I
889 believe it would work anyhow. */
890 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 2
891 && (strncmp (section
->name
, ".stab", 5) == 0))
892 section
->alignment_power
= 2;
899 /* Set the alignment of a BFD section. */
902 coff_set_alignment_hook (abfd
, section
, scnhdr
)
907 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
910 for (i
= 0; i
< 32; i
++)
911 if ((1 << i
) >= hdr
->s_align
)
913 section
->alignment_power
= i
;
918 #define coff_set_alignment_hook \
919 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
923 #ifndef coff_mkobject
928 coff_data_type
*coff
;
930 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*) bfd_zalloc (abfd
, sizeof (coff_data_type
));
931 if (abfd
->tdata
.coff_obj_data
== 0)
933 bfd_set_error (bfd_error_no_memory
);
936 coff
= coff_data (abfd
);
937 coff
->symbols
= (coff_symbol_type
*) NULL
;
938 coff
->conversion_table
= (unsigned int *) NULL
;
939 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
941 /* make_abs_section(abfd);*/
947 /* Create the COFF backend specific information. */
948 #ifndef coff_mkobject_hook
950 coff_mkobject_hook (abfd
, filehdr
, aouthdr
)
955 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
956 coff_data_type
*coff
;
958 if (coff_mkobject (abfd
) == false)
961 coff
= coff_data (abfd
);
963 coff
->sym_filepos
= internal_f
->f_symptr
;
965 /* These members communicate important constants about the symbol
966 table to GDB's symbol-reading code. These `constants'
967 unfortunately vary among coff implementations... */
968 coff
->local_n_btmask
= N_BTMASK
;
969 coff
->local_n_btshft
= N_BTSHFT
;
970 coff
->local_n_tmask
= N_TMASK
;
971 coff
->local_n_tshift
= N_TSHIFT
;
972 coff
->local_symesz
= SYMESZ
;
973 coff
->local_auxesz
= AUXESZ
;
974 coff
->local_linesz
= LINESZ
;
976 obj_raw_syment_count (abfd
) =
977 obj_conv_table_size (abfd
) =
984 /* Determine the machine architecture and type. FIXME: This is target
985 dependent because the magic numbers are defined in the target
986 dependent header files. But there is no particular need for this.
987 If the magic numbers were moved to a separate file, this function
988 would be target independent and would also be much more successful
989 at linking together COFF files for different architectures. */
992 coff_set_arch_mach_hook (abfd
, filehdr
)
997 enum bfd_architecture arch
;
998 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1001 switch (internal_f
->f_magic
)
1006 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
1007 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
1008 arch
= bfd_arch_i386
;
1012 #ifdef A29K_MAGIC_BIG
1013 case A29K_MAGIC_BIG
:
1014 case A29K_MAGIC_LITTLE
:
1015 arch
= bfd_arch_a29k
;
1021 arch
= bfd_arch_arm
;
1028 #ifdef MC68KBCSMAGIC
1031 #ifdef APOLLOM68KMAGIC
1032 case APOLLOM68KMAGIC
:
1034 #ifdef LYNXCOFFMAGIC
1037 arch
= bfd_arch_m68k
;
1045 arch
= bfd_arch_m88k
;
1051 arch
= bfd_arch_z8k
;
1052 switch (internal_f
->f_flags
& F_MACHMASK
)
1055 machine
= bfd_mach_z8001
;
1058 machine
= bfd_mach_z8002
;
1069 arch
= bfd_arch_i960
;
1070 switch (F_I960TYPE
& internal_f
->f_flags
)
1074 machine
= bfd_mach_i960_core
;
1077 machine
= bfd_mach_i960_kb_sb
;
1080 machine
= bfd_mach_i960_mc
;
1083 machine
= bfd_mach_i960_xa
;
1086 machine
= bfd_mach_i960_ca
;
1089 machine
= bfd_mach_i960_ka_sa
;
1091 /* start-sanitize-i960xl */
1093 machine
= bfd_mach_i960_xl
;
1095 /* end-sanitize-i960xl */
1105 arch
= bfd_arch_rs6000
;
1112 arch
= bfd_arch_we32k
;
1119 arch
= bfd_arch_h8300
;
1120 machine
= bfd_mach_h8300
;
1121 /* !! FIXME this probably isn't the right place for this */
1122 abfd
->flags
|= BFD_IS_RELAXABLE
;
1128 arch
= bfd_arch_h8300
;
1129 machine
= bfd_mach_h8300h
;
1130 /* !! FIXME this probably isn't the right place for this */
1131 abfd
->flags
|= BFD_IS_RELAXABLE
;
1135 #ifdef SH_ARCH_MAGIC_BIG
1136 case SH_ARCH_MAGIC_BIG
:
1137 case SH_ARCH_MAGIC_LITTLE
:
1145 arch
= bfd_arch_h8500
;
1152 #ifdef LYNXCOFFMAGIC
1155 arch
= bfd_arch_sparc
;
1160 default: /* Unreadable input file type */
1161 arch
= bfd_arch_obscure
;
1165 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1169 #ifdef SYMNAME_IN_DEBUG
1172 symname_in_debug_hook (abfd
, sym
)
1174 struct internal_syment
*sym
;
1176 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1181 #define symname_in_debug_hook \
1182 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1190 To write relocations, the back end steps though the
1191 canonical relocation table and create an
1192 @code{internal_reloc}. The symbol index to use is removed from
1193 the @code{offset} field in the symbol table supplied. The
1194 address comes directly from the sum of the section base
1195 address and the relocation offset; the type is dug directly
1196 from the howto field. Then the @code{internal_reloc} is
1197 swapped into the shape of an @code{external_reloc} and written
1203 coff_write_relocs (abfd
, first_undef
)
1208 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1211 struct external_reloc dst
;
1213 arelent
**p
= s
->orelocation
;
1214 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1216 for (i
= 0; i
< s
->reloc_count
; i
++)
1218 struct internal_reloc n
;
1220 memset ((PTR
) & n
, 0, sizeof (n
));
1222 /* Now we've renumbered the symbols we know where the
1223 undefined symbols live in the table. Check the reloc
1224 entries for symbols who's output bfd isn't the right one.
1225 This is because the symbol was undefined (which means
1226 that all the pointers are never made to point to the same
1227 place). This is a bad thing,'cause the symbols attached
1228 to the output bfd are indexed, so that the relocation
1229 entries know which symbol index they point to. So we
1230 have to look up the output symbol here. */
1232 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1235 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1236 asymbol
**outsyms
= abfd
->outsymbols
;
1237 for (i
= first_undef
; outsyms
[i
]; i
++)
1239 const char *intable
= outsyms
[i
]->name
;
1240 if (strcmp (intable
, sname
) == 0) {
1241 /* got a hit, so repoint the reloc */
1242 q
->sym_ptr_ptr
= outsyms
+ i
;
1248 n
.r_vaddr
= q
->address
+ s
->vma
;
1251 /* The 29k const/consth reloc pair is a real kludge. The consth
1252 part doesn't have a symbol; it has an offset. So rebuilt
1254 if (q
->howto
->type
== R_IHCONST
)
1255 n
.r_symndx
= q
->addend
;
1260 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1261 /* This is a relocation relative to the absolute symbol. */
1265 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1266 /* Take notice if the symbol reloc points to a symbol
1267 we don't have in our symbol table. What should we
1269 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1274 #ifdef SWAP_OUT_RELOC_OFFSET
1275 n
.r_offset
= q
->addend
;
1279 /* Work out reloc type from what is required */
1280 SELECT_RELOC (n
, q
->howto
);
1282 n
.r_type
= q
->howto
->type
;
1284 coff_swap_reloc_out (abfd
, &n
, &dst
);
1285 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1293 /* Set flags and magic number of a coff file from architecture and machine
1294 type. Result is true if we can represent the arch&type, false if not. */
1297 coff_set_flags (abfd
, magicp
, flagsp
)
1300 unsigned short *flagsp
;
1302 switch (bfd_get_arch (abfd
))
1307 switch (bfd_get_mach (abfd
))
1309 case bfd_mach_z8001
:
1312 case bfd_mach_z8002
:
1326 *magicp
= I960ROMAGIC
;
1328 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1329 I960RWMAGIC); FIXME???
1331 switch (bfd_get_mach (abfd
))
1333 case bfd_mach_i960_core
:
1336 case bfd_mach_i960_kb_sb
:
1339 case bfd_mach_i960_mc
:
1342 case bfd_mach_i960_xa
:
1345 case bfd_mach_i960_ca
:
1348 case bfd_mach_i960_ka_sa
:
1351 /* start-sanitize-i960xl */
1352 case bfd_mach_i960_xl
:
1355 /* end-sanitize-i960xl */
1371 *magicp
= I386MAGIC
;
1373 /* Just overwrite the usual value if we're doing Lynx. */
1374 *magicp
= LYNXCOFFMAGIC
;
1381 #ifdef APOLLOM68KMAGIC
1382 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1384 *magicp
= MC68MAGIC
;
1387 /* Just overwrite the usual value if we're doing Lynx. */
1388 *magicp
= LYNXCOFFMAGIC
;
1396 *magicp
= MC88OMAGIC
;
1401 case bfd_arch_h8300
:
1402 switch (bfd_get_mach (abfd
))
1404 case bfd_mach_h8300
:
1405 *magicp
= H8300MAGIC
;
1407 case bfd_mach_h8300h
:
1408 *magicp
= H8300HMAGIC
;
1414 #ifdef SH_ARCH_MAGIC_BIG
1416 if (abfd
->xvec
->byteorder_big_p
)
1417 *magicp
= SH_ARCH_MAGIC_BIG
;
1419 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1425 case bfd_arch_sparc
:
1426 *magicp
= SPARCMAGIC
;
1428 /* Just overwrite the usual value if we're doing Lynx. */
1429 *magicp
= LYNXCOFFMAGIC
;
1436 case bfd_arch_h8500
:
1437 *magicp
= H8500MAGIC
;
1441 #ifdef A29K_MAGIC_BIG
1443 if (abfd
->xvec
->byteorder_big_p
)
1444 *magicp
= A29K_MAGIC_BIG
;
1446 *magicp
= A29K_MAGIC_LITTLE
;
1452 case bfd_arch_we32k
:
1453 *magicp
= WE32KMAGIC
;
1459 case bfd_arch_rs6000
:
1460 case bfd_arch_powerpc
:
1461 *magicp
= U802TOCMAGIC
;
1466 default: /* Unknown architecture */
1467 /* return false; -- fall through to "return false" below, to avoid
1468 "statement never reached" errors on the one below. */
1477 coff_set_arch_mach (abfd
, arch
, machine
)
1479 enum bfd_architecture arch
;
1480 unsigned long machine
;
1483 unsigned short dummy2
;
1485 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
1488 if (arch
!= bfd_arch_unknown
&&
1489 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
1490 return false; /* We can't represent this type */
1492 return true; /* We're easy ... */
1496 /* Calculate the file position for each section. */
1499 coff_compute_section_file_positions (abfd
)
1503 asection
*previous
= (asection
*) NULL
;
1504 file_ptr sofar
= FILHSZ
;
1512 #ifdef COFF_IMAGE_WITH_PE
1514 if (coff_data (abfd
)->link_info
)
1516 page_size
= pe_data (abfd
)->pe_opthdr
.FileAlignment
;
1519 page_size
= PE_DEF_FILE_ALIGNMENT
;
1520 #elif defined (COFF_PAGE_SIZE)
1521 int page_size
= COFF_PAGE_SIZE
;
1524 if (bfd_get_start_address (abfd
))
1526 /* A start address may have been added to the original file. In this
1527 case it will need an optional header to record it. */
1528 abfd
->flags
|= EXEC_P
;
1531 if (abfd
->flags
& EXEC_P
)
1534 sofar
+= abfd
->section_count
* SCNHSZ
;
1535 for (current
= abfd
->sections
, count
= 1;
1536 current
!= (asection
*) NULL
;
1537 current
= current
->next
, ++count
)
1539 current
->target_index
= count
;
1541 /* Only deal with sections which have contents */
1542 if (!(current
->flags
& SEC_HAS_CONTENTS
))
1546 /* Do not include the .junk section. This is where we collect section
1547 data which we don't need. This is mainly the MS .debug$ data which
1548 stores codeview debug data. */
1549 if (strcmp (current
->name
, ".junk") == 0)
1555 /* Align the sections in the file to the same boundary on
1556 which they are aligned in virtual memory. I960 doesn't
1557 do this (FIXME) so we can stay in sync with Intel. 960
1558 doesn't yet page from files... */
1561 /* make sure this section is aligned on the right boundary - by
1562 padding the previous section up if necessary */
1565 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1566 if (previous
!= (asection
*) NULL
)
1568 previous
->_raw_size
+= sofar
- old_sofar
;
1574 /* In demand paged files the low order bits of the file offset
1575 must match the low order bits of the virtual address. */
1576 #ifdef COFF_PAGE_SIZE
1577 if ((abfd
->flags
& D_PAGED
) != 0
1578 && (current
->flags
& SEC_ALLOC
) != 0)
1579 sofar
+= (current
->vma
- sofar
) % page_size
;
1581 current
->filepos
= sofar
;
1583 #ifdef COFF_IMAGE_WITH_PE
1584 /* With PE we have to pad each section to be a multiple of its page size
1585 too, and remember both sizes. Cooked_size becomes very useful. */
1586 current
->_cooked_size
= current
->_raw_size
;
1587 current
->_raw_size
= (current
->_raw_size
+ page_size
-1) & -page_size
;
1590 sofar
+= current
->_raw_size
;
1593 /* make sure that this section is of the right size too */
1595 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1596 current
->_raw_size
+= sofar
- old_sofar
;
1600 /* Force .lib sections to start at zero. The vma is then
1601 incremented in coff_set_section_contents. This is right for
1603 if (strcmp (current
->name
, _LIB
) == 0)
1604 bfd_set_section_vma (abfd
, current
, 0);
1610 obj_relocbase (abfd
) = sofar
;
1611 abfd
->output_has_begun
= true;
1615 #ifndef RS6000COFF_C
1617 /* If .file, .text, .data, .bss symbols are missing, add them. */
1618 /* @@ Should we only be adding missing symbols, or overriding the aux
1619 values for existing section symbols? */
1621 coff_add_missing_symbols (abfd
)
1624 unsigned int nsyms
= bfd_get_symcount (abfd
);
1625 asymbol
**sympp
= abfd
->outsymbols
;
1628 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
1630 for (i
= 0; i
< nsyms
; i
++)
1632 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
1636 /* only do this if there is a coff representation of the input
1638 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
1643 name
= csym
->symbol
.name
;
1646 if (!strcmp (name
, _TEXT
))
1649 else if (!strcmp (name
, ".wtext"))
1652 else if (!strcmp (name
, _DATA
))
1654 else if (!strcmp (name
, _BSS
))
1658 /* Now i == bfd_get_symcount (abfd). */
1659 /* @@ For now, don't deal with .file symbol. */
1662 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
1664 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
1665 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
1668 bfd_set_error (bfd_error_no_memory
);
1671 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
1674 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1678 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
1680 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
1682 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
1683 BFD_ASSERT (i
== nsyms
);
1684 bfd_set_symtab (abfd
, sympp2
, nsyms
);
1688 #endif /* ! defined (RS6000COFF_C) */
1695 coff_write_object_contents (abfd
)
1699 boolean hasrelocs
= false;
1700 boolean haslinno
= false;
1701 file_ptr reloc_base
;
1702 file_ptr lineno_base
;
1704 unsigned long reloc_size
= 0;
1705 unsigned long lnno_size
= 0;
1706 asection
*text_sec
= NULL
;
1707 asection
*data_sec
= NULL
;
1708 asection
*bss_sec
= NULL
;
1710 struct internal_filehdr internal_f
;
1711 struct internal_aouthdr internal_a
;
1713 bfd_set_error (bfd_error_system_call
);
1715 if (abfd
->output_has_begun
== false)
1716 coff_compute_section_file_positions (abfd
);
1718 reloc_base
= obj_relocbase (abfd
);
1720 /* Make a pass through the symbol table to count line number entries and
1721 put them into the correct asections */
1723 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
1725 /* Work out the size of the reloc and linno areas */
1727 for (current
= abfd
->sections
; current
!= NULL
; current
=
1729 reloc_size
+= current
->reloc_count
* RELSZ
;
1731 lineno_base
= reloc_base
+ reloc_size
;
1732 sym_base
= lineno_base
+ lnno_size
;
1734 /* Indicate in each section->line_filepos its actual file address */
1735 for (current
= abfd
->sections
; current
!= NULL
; current
=
1738 if (current
->lineno_count
)
1740 current
->line_filepos
= lineno_base
;
1741 current
->moving_line_filepos
= lineno_base
;
1742 lineno_base
+= current
->lineno_count
* LINESZ
;
1746 current
->line_filepos
= 0;
1748 if (current
->reloc_count
)
1750 current
->rel_filepos
= reloc_base
;
1751 reloc_base
+= current
->reloc_count
* RELSZ
;
1755 current
->rel_filepos
= 0;
1759 /* Write section headers to the file. */
1760 internal_f
.f_nscns
= 0;
1763 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1764 (FILHSZ
+ AOUTSZ
) : FILHSZ
),
1768 for (current
= abfd
->sections
;
1770 current
= current
->next
)
1772 struct internal_scnhdr section
;
1775 /* Do not include the .junk section. This is where we collect section
1776 data which we don't need. This is mainly the MS .debug$ data which
1777 stores codeview debug data. */
1778 if (strcmp (current
->name
, ".junk") == 0)
1783 /* If we've got a .reloc section, remember. */
1785 if (strcmp (current
->name
, ".reloc") == 0)
1787 pe_data (abfd
)->has_reloc_section
= 1;
1790 internal_f
.f_nscns
++;
1791 strncpy (&(section
.s_name
[0]), current
->name
, 8);
1793 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1794 Ian Taylor <ian@cygnus.com>. */
1795 if (strcmp (current
->name
, _LIB
) == 0)
1796 section
.s_vaddr
= 0;
1799 section
.s_vaddr
= current
->lma
;
1800 section
.s_paddr
= current
->lma
;
1801 section
.s_size
= current
->_raw_size
;
1804 section
.s_paddr
= current
->_cooked_size
;
1808 If this section has no size or is unloadable then the scnptr
1811 if (current
->_raw_size
== 0 ||
1812 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
1814 section
.s_scnptr
= 0;
1818 section
.s_scnptr
= current
->filepos
;
1820 section
.s_relptr
= current
->rel_filepos
;
1821 section
.s_lnnoptr
= current
->line_filepos
;
1822 section
.s_nreloc
= current
->reloc_count
;
1823 section
.s_nlnno
= current
->lineno_count
;
1824 if (current
->reloc_count
!= 0)
1826 if (current
->lineno_count
!= 0)
1829 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
1831 if (!strcmp (current
->name
, _TEXT
))
1835 else if (!strcmp (current
->name
, _DATA
))
1838 #ifdef TWO_DATA_SECS
1840 else if (!strcmp (current
->name
, ".data2"))
1843 #endif /* TWO_DATA_SECS */
1845 else if (!strcmp (current
->name
, _BSS
))
1851 section
.s_align
= (current
->alignment_power
1852 ? 1 << current
->alignment_power
1857 #ifdef COFF_IMAGE_WITH_PE
1858 /* suppress output of the sections if they are null. ld includes
1859 the bss and data sections even if there is no size assigned
1860 to them. NT loader doesn't like it if these section headers are
1861 included if the sections themselves are not needed */
1862 if (section
.s_size
== 0)
1863 internal_f
.f_nscns
--;
1868 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
1869 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
1876 /* OK, now set up the filehdr... */
1878 /* Don't include the internal abs section in the section count */
1881 We will NOT put a fucking timestamp in the header here. Every time you
1882 put it back, I will come in and take it out again. I'm sorry. This
1883 field does not belong here. We fill it with a 0 so it compares the
1884 same but is not a reasonable time. -- gnu@cygnus.com
1887 internal_f
.f_flags
= 0;
1889 if (abfd
->flags
& EXEC_P
)
1890 internal_f
.f_opthdr
= AOUTSZ
;
1892 internal_f
.f_opthdr
= 0;
1895 internal_f
.f_flags
|= F_RELFLG
;
1897 internal_f
.f_flags
|= F_LNNO
;
1898 if (abfd
->flags
& EXEC_P
)
1899 internal_f
.f_flags
|= F_EXEC
;
1901 if (!abfd
->xvec
->byteorder_big_p
)
1902 internal_f
.f_flags
|= F_AR32WR
;
1904 internal_f
.f_flags
|= F_AR32W
;
1907 FIXME, should do something about the other byte orders and
1911 memset (&internal_a
, 0, sizeof internal_a
);
1913 /* Set up architecture-dependent stuff */
1916 unsigned int magic
= 0;
1917 unsigned short flags
= 0;
1918 coff_set_flags (abfd
, &magic
, &flags
);
1919 internal_f
.f_magic
= magic
;
1920 internal_f
.f_flags
|= flags
;
1921 /* ...and the "opt"hdr... */
1924 #ifdef ULTRA3 /* NYU's machine */
1925 /* FIXME: This is a bogus check. I really want to see if there
1926 * is a .shbss or a .shdata section, if so then set the magic
1927 * number to indicate a shared data executable.
1929 if (internal_f
.f_nscns
>= 7)
1930 internal_a
.magic
= SHMAGIC
; /* Shared magic */
1933 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
1934 #define __A_MAGIC_SET__
1937 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
1938 #define __A_MAGIC_SET__
1941 #define __A_MAGIC_SET__
1942 internal_a
.magic
= PAGEMAGICBCS
;
1946 #define __A_MAGIC_SET__
1947 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
1950 #if defined(M68) || defined(WE32K) || defined(M68K)
1951 #define __A_MAGIC_SET__
1953 internal_a
.magic
= LYNXCOFFMAGIC
;
1955 #endif /* M68 || WE32K || M68K */
1958 #define __A_MAGIC_SET__
1959 internal_a
.magic
= ZMAGIC
;
1962 #define __A_MAGIC_SET__
1964 internal_a
.magic
= LYNXCOFFMAGIC
;
1966 internal_a
.magic
= ZMAGIC
;
1971 #define __A_MAGIC_SET__
1973 internal_a
.magic
= LYNXCOFFMAGIC
;
1978 #define __A_MAGIC_SET__
1979 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
1980 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
1981 RS6K_AOUTHDR_OMAGIC
;
1984 #ifndef __A_MAGIC_SET__
1985 #include "Your aouthdr magic number is not being set!"
1987 #undef __A_MAGIC_SET__
1991 /* FIXME: Does anybody ever set this to another value? */
1992 internal_a
.vstamp
= 0;
1994 /* Now should write relocs, strings, syms */
1995 obj_sym_filepos (abfd
) = sym_base
;
1997 if (bfd_get_symcount (abfd
) != 0)
2000 #ifndef RS6000COFF_C
2001 if (!coff_add_missing_symbols (abfd
))
2004 if (!coff_renumber_symbols (abfd
, &firstundef
))
2006 coff_mangle_symbols (abfd
);
2007 if (! coff_write_symbols (abfd
))
2009 if (! coff_write_linenumbers (abfd
))
2011 if (! coff_write_relocs (abfd
, firstundef
))
2015 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2016 backend linker, and obj_raw_syment_count is not valid until after
2017 coff_write_symbols is called. */
2018 if (obj_raw_syment_count (abfd
) != 0)
2019 internal_f
.f_symptr
= sym_base
;
2022 internal_f
.f_symptr
= 0;
2023 internal_f
.f_flags
|= F_LSYMS
;
2028 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2029 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2033 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2034 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2038 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2041 internal_a
.entry
= bfd_get_start_address (abfd
);
2042 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2044 /* now write them */
2045 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2049 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) & buff
);
2050 if (bfd_write ((PTR
) & buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2053 if (abfd
->flags
& EXEC_P
)
2056 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) & buff
);
2057 if (bfd_write ((PTR
) & buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2065 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2070 bfd_size_type count
;
2072 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
2073 coff_compute_section_file_positions (abfd
);
2076 /* If this is a .lib section, bump the vma address so that it
2077 winds up being the number of .lib sections output. This is
2078 right for SVR3.2. Shared libraries should probably get more
2079 generic support. Ian Taylor <ian@cygnus.com>. */
2080 if (strcmp (section
->name
, _LIB
) == 0)
2084 /* Don't write out bss sections - one way to do this is to
2085 see if the filepos has not been set. */
2086 if (section
->filepos
== 0)
2089 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
2094 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
2100 coff_close_and_cleanup (abfd
)
2103 if (!bfd_read_p (abfd
))
2104 switch (abfd
->format
)
2107 if (!_bfd_write_archive_contents (abfd
))
2111 if (!coff_write_object_contents (abfd
))
2115 bfd_set_error (bfd_error_invalid_operation
);
2119 /* We depend on bfd_close to free all the memory on the obstack. */
2120 /* FIXME if bfd_release is not using obstacks! */
2127 buy_and_read (abfd
, where
, seek_direction
, size
)
2133 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
2136 bfd_set_error (bfd_error_no_memory
);
2139 if (bfd_seek (abfd
, where
, seek_direction
) != 0
2140 || bfd_read (area
, 1, size
, abfd
) != size
)
2143 } /* buy_and_read() */
2149 Creating the linenumber table is done by reading in the entire
2150 coff linenumber table, and creating another table for internal use.
2152 A coff linenumber table is structured so that each function
2153 is marked as having a line number of 0. Each line within the
2154 function is an offset from the first line in the function. The
2155 base of the line number information for the table is stored in
2156 the symbol associated with the function.
2158 The information is copied from the external to the internal
2159 table, and each symbol which marks a function is marked by
2162 How does this work ?
2167 coff_slurp_line_table (abfd
, asect
)
2171 LINENO
*native_lineno
;
2172 alent
*lineno_cache
;
2174 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
2176 native_lineno
= (LINENO
*) buy_and_read (abfd
,
2177 asect
->line_filepos
,
2180 asect
->lineno_count
));
2182 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
2183 if (lineno_cache
== NULL
)
2185 bfd_set_error (bfd_error_no_memory
);
2190 unsigned int counter
= 0;
2191 alent
*cache_ptr
= lineno_cache
;
2192 LINENO
*src
= native_lineno
;
2194 while (counter
< asect
->lineno_count
)
2196 struct internal_lineno dst
;
2197 coff_swap_lineno_in (abfd
, src
, &dst
);
2198 cache_ptr
->line_number
= dst
.l_lnno
;
2200 if (cache_ptr
->line_number
== 0)
2202 coff_symbol_type
*sym
=
2203 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
2204 + obj_raw_syments (abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
2205 cache_ptr
->u
.sym
= (asymbol
*) sym
;
2206 sym
->lineno
= cache_ptr
;
2210 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
2211 - bfd_section_vma (abfd
, asect
);
2212 } /* If no linenumber expect a symbol index */
2218 cache_ptr
->line_number
= 0;
2221 asect
->lineno
= lineno_cache
;
2222 /* FIXME, free native_lineno here, or use alloca or something. */
2227 coff_slurp_symbol_table (abfd
)
2230 combined_entry_type
*native_symbols
;
2231 coff_symbol_type
*cached_area
;
2232 unsigned int *table_ptr
;
2234 unsigned int number_of_symbols
= 0;
2236 if (obj_symbols (abfd
))
2239 /* Read in the symbol table */
2240 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
2245 /* Allocate enough room for all the symbols in cached form */
2246 cached_area
= ((coff_symbol_type
*)
2248 (obj_raw_syment_count (abfd
)
2249 * sizeof (coff_symbol_type
))));
2251 if (cached_area
== NULL
)
2253 bfd_set_error (bfd_error_no_memory
);
2256 table_ptr
= ((unsigned int *)
2258 (obj_raw_syment_count (abfd
)
2259 * sizeof (unsigned int))));
2261 if (table_ptr
== NULL
)
2263 bfd_set_error (bfd_error_no_memory
);
2268 coff_symbol_type
*dst
= cached_area
;
2269 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
2270 unsigned int this_index
= 0;
2271 while (this_index
< last_native_index
)
2273 combined_entry_type
*src
= native_symbols
+ this_index
;
2274 table_ptr
[this_index
] = number_of_symbols
;
2275 dst
->symbol
.the_bfd
= abfd
;
2277 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
2278 /* We use the native name field to point to the cached field. */
2279 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
2280 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
2281 src
->u
.syment
.n_scnum
);
2282 dst
->symbol
.flags
= 0;
2283 dst
->done_lineno
= false;
2285 switch (src
->u
.syment
.n_sclass
)
2290 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2291 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2292 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2294 /* Fall through to next case */
2303 /* PE uses storage class 0x68 to denote a section symbol */
2306 if ((src
->u
.syment
.n_scnum
) == 0)
2308 if ((src
->u
.syment
.n_value
) == 0)
2310 dst
->symbol
.section
= bfd_und_section_ptr
;
2311 dst
->symbol
.value
= 0;
2315 dst
->symbol
.section
= bfd_com_section_ptr
;
2316 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2322 Base the value as an index from the base of the
2326 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2327 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2329 if (ISFCN ((src
->u
.syment
.n_type
)))
2332 A function ext does not go at the end of a file
2334 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2339 /* If this symbol has a csect aux of type LD, the scnlen field
2340 is actually the index of the containing csect symbol. We
2341 need to pointerize it. */
2342 if (src
->u
.syment
.n_numaux
> 0)
2344 combined_entry_type
*aux
;
2346 aux
= src
+ src
->u
.syment
.n_numaux
- 1;
2347 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
2349 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
2350 native_symbols
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
2351 aux
->fix_scnlen
= 1;
2358 case C_STAT
: /* static */
2360 case C_LEAFSTAT
: /* static leaf procedure */
2362 case C_LABEL
: /* label */
2363 if (src
->u
.syment
.n_scnum
== -2)
2364 dst
->symbol
.flags
= BSF_DEBUGGING
;
2366 dst
->symbol
.flags
= BSF_LOCAL
;
2368 Base the value as an index from the base of the section, if
2371 if (dst
->symbol
.section
)
2372 dst
->symbol
.value
= (src
->u
.syment
.n_value
) -
2373 dst
->symbol
.section
->vma
;
2375 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2378 case C_MOS
: /* member of structure */
2379 case C_EOS
: /* end of structure */
2380 #ifdef NOTDEF /* C_AUTOARG has the same value */
2382 case C_GLBLREG
: /* A29k-specific storage class */
2385 case C_REGPARM
: /* register parameter */
2386 case C_REG
: /* register variable */
2388 case C_AUTOARG
: /* 960-specific storage class */
2390 case C_TPDEF
: /* type definition */
2392 case C_AUTO
: /* automatic variable */
2393 case C_FIELD
: /* bit field */
2394 case C_ENTAG
: /* enumeration tag */
2395 case C_MOE
: /* member of enumeration */
2396 case C_MOU
: /* member of union */
2397 case C_UNTAG
: /* union tag */
2398 dst
->symbol
.flags
= BSF_DEBUGGING
;
2399 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2402 case C_FILE
: /* file name */
2403 case C_STRTAG
: /* structure tag */
2405 case C_BINCL
: /* beginning of include file */
2406 case C_EINCL
: /* ending of include file */
2418 dst
->symbol
.flags
= BSF_DEBUGGING
;
2419 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2424 dst
->symbol
.flags
= BSF_DEBUGGING
;
2425 dst
->symbol
.value
= src
->u
.syment
.n_value
;
2427 /* The value is actually a symbol index. Save a pointer to
2428 the symbol instead of the index. FIXME: This should use a
2430 src
->u
.syment
.n_value
=
2431 (long) (native_symbols
+ src
->u
.syment
.n_value
);
2436 case C_BLOCK
: /* ".bb" or ".eb" */
2437 case C_FCN
: /* ".bf" or ".ef" */
2438 case C_EFCN
: /* physical end of function */
2439 dst
->symbol
.flags
= BSF_LOCAL
;
2441 Base the value as an index from the base of the section
2443 dst
->symbol
.value
= (src
->u
.syment
.n_value
) - dst
->symbol
.section
->vma
;
2447 case C_EXTDEF
: /* external definition */
2448 case C_ULABEL
: /* undefined label */
2449 case C_USTATIC
: /* undefined static */
2450 #ifndef COFF_WITH_PE
2451 /* C_LINE in regular coff is 0x68. NT has taken over this storage
2452 class to represent a section symbol */
2453 case C_LINE
: /* line # reformatted as symbol table entry */
2455 case C_ALIAS
: /* duplicate tag */
2456 case C_HIDDEN
: /* ext symbol in dmert public lib */
2458 (*_bfd_error_handler
)
2459 ("%s: Unrecognized storage class %d for %s symbol `%s'",
2460 bfd_get_filename (abfd
), src
->u
.syment
.n_sclass
,
2461 dst
->symbol
.section
->name
, dst
->symbol
.name
);
2462 dst
->symbol
.flags
= BSF_DEBUGGING
;
2463 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2467 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2471 dst
->symbol
.udata
.i
= 0;
2472 dst
->lineno
= (alent
*) NULL
;
2473 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
2475 number_of_symbols
++;
2476 } /* walk the native symtab */
2477 } /* bfdize the native symtab */
2479 obj_symbols (abfd
) = cached_area
;
2480 obj_raw_syments (abfd
) = native_symbols
;
2482 bfd_get_symcount (abfd
) = number_of_symbols
;
2483 obj_convert (abfd
) = table_ptr
;
2484 /* Slurp the line tables for each section too */
2490 coff_slurp_line_table (abfd
, p
);
2495 } /* coff_slurp_symbol_table() */
2497 /* Check whether a symbol is globally visible. This is used by the
2498 COFF backend linker code in cofflink.c, since a couple of targets
2499 have globally visible symbols which are not class C_EXT. This
2500 function need not handle the case of n_class == C_EXT. */
2502 #undef OTHER_GLOBAL_CLASS
2505 #define OTHER_GLOBAL_CLASS C_LEAFEXT
2509 #define OTHER_GLOBAL_CLASS C_HIDEXT
2513 #define OTHER_GLOBAL_CLASS C_SECTION
2516 #ifdef OTHER_GLOBAL_CLASS
2519 coff_sym_is_global (abfd
, syment
)
2521 struct internal_syment
*syment
;
2523 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
2528 #undef OTHER_GLOBAL_CLASS
2530 #else /* ! defined (OTHER_GLOBAL_CLASS) */
2532 /* sym_is_global should not be defined if it has nothing to do. */
2534 #define coff_sym_is_global 0
2536 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
2542 Coff relocations are easily transformed into the internal BFD form
2545 Reading a coff relocation table is done in the following stages:
2547 o Read the entire coff relocation table into memory.
2549 o Process each relocation in turn; first swap it from the
2550 external to the internal form.
2552 o Turn the symbol referenced in the relocation's symbol index
2553 into a pointer into the canonical symbol table.
2554 This table is the same as the one returned by a call to
2555 @code{bfd_canonicalize_symtab}. The back end will call that
2556 routine and save the result if a canonicalization hasn't been done.
2558 o The reloc index is turned into a pointer to a howto
2559 structure, in a back end specific way. For instance, the 386
2560 and 960 use the @code{r_type} to directly produce an index
2561 into a howto table vector; the 88k subtracts a number from the
2562 @code{r_type} field and creates an addend field.
2568 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2570 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2571 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2572 coffsym = (obj_symbols (abfd) \
2573 + (cache_ptr->sym_ptr_ptr - symbols)); \
2575 coffsym = coff_symbol_from (abfd, ptr); \
2576 if (coffsym != (coff_symbol_type *) NULL \
2577 && coffsym->native->u.syment.n_scnum == 0) \
2578 cache_ptr->addend = 0; \
2579 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2580 && ptr->section != (asection *) NULL) \
2581 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2583 cache_ptr->addend = 0; \
2588 coff_slurp_reloc_table (abfd
, asect
, symbols
)
2593 RELOC
*native_relocs
;
2594 arelent
*reloc_cache
;
2599 if (asect
->relocation
)
2601 if (asect
->reloc_count
== 0)
2603 if (asect
->flags
& SEC_CONSTRUCTOR
)
2605 if (!coff_slurp_symbol_table (abfd
))
2608 (RELOC
*) buy_and_read (abfd
,
2612 asect
->reloc_count
));
2613 reloc_cache
= (arelent
*)
2614 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
2616 if (reloc_cache
== NULL
)
2618 bfd_set_error (bfd_error_no_memory
);
2623 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2625 #ifdef RELOC_PROCESSING
2626 struct internal_reloc dst
;
2627 struct external_reloc
*src
;
2629 cache_ptr
= reloc_cache
+ idx
;
2630 src
= native_relocs
+ idx
;
2631 coff_swap_reloc_in (abfd
, src
, &dst
);
2633 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
2635 struct internal_reloc dst
;
2637 struct external_reloc
*src
;
2639 cache_ptr
= reloc_cache
+ idx
;
2640 src
= native_relocs
+ idx
;
2642 coff_swap_reloc_in (abfd
, src
, &dst
);
2645 cache_ptr
->address
= dst
.r_vaddr
;
2647 if (dst
.r_symndx
!= -1)
2649 /* @@ Should never be greater than count of symbols! */
2650 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
2652 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[dst
.r_symndx
];
2653 ptr
= *(cache_ptr
->sym_ptr_ptr
);
2657 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
2661 /* The symbols definitions that we have read in have been
2662 relocated as if their sections started at 0. But the offsets
2663 refering to the symbols in the raw data have not been
2664 modified, so we have to have a negative addend to compensate.
2666 Note that symbols which used to be common must be left alone */
2668 /* Calculate any reloc addend by looking at the symbol */
2669 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
2671 cache_ptr
->address
-= asect
->vma
;
2672 /* !! cache_ptr->section = (asection *) NULL;*/
2674 /* Fill in the cache_ptr->howto field from dst.r_type */
2675 RTYPE2HOWTO (cache_ptr
, &dst
);
2680 asect
->relocation
= reloc_cache
;
2684 #ifndef coff_rtype_to_howto
2687 /* Get the howto structure for a reloc. This is only used if the file
2688 including this one defines coff_relocate_section to be
2689 _bfd_coff_generic_relocate_section, so it is OK if it does not
2690 always work. It is the responsibility of the including file to
2691 make sure it is reasonable if it is needed. */
2693 static reloc_howto_type
*coff_rtype_to_howto
2694 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
2695 struct coff_link_hash_entry
*, struct internal_syment
*,
2699 static reloc_howto_type
*
2700 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
2703 struct internal_reloc
*rel
;
2704 struct coff_link_hash_entry
*h
;
2705 struct internal_syment
*sym
;
2710 RTYPE2HOWTO (&genrel
, rel
);
2711 return genrel
.howto
;
2714 #else /* ! defined (RTYPE2HOWTO) */
2716 #define coff_rtype_to_howto NULL
2718 #endif /* ! defined (RTYPE2HOWTO) */
2719 #endif /* ! defined (coff_rtype_to_howto) */
2721 /* This is stupid. This function should be a boolean predicate. */
2723 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
2729 arelent
*tblptr
= section
->relocation
;
2730 unsigned int count
= 0;
2733 if (section
->flags
& SEC_CONSTRUCTOR
)
2735 /* this section has relocs made up by us, they are not in the
2736 file, so take them out of their chain and place them into
2737 the data area provided */
2738 arelent_chain
*chain
= section
->constructor_chain
;
2739 for (count
= 0; count
< section
->reloc_count
; count
++)
2741 *relptr
++ = &chain
->relent
;
2742 chain
= chain
->next
;
2748 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
2751 tblptr
= section
->relocation
;
2753 for (; count
++ < section
->reloc_count
;)
2754 *relptr
++ = tblptr
++;
2759 return section
->reloc_count
;
2764 coff_sym_filepos (abfd
)
2767 return obj_sym_filepos (abfd
);
2771 #ifndef coff_reloc16_estimate
2772 #define coff_reloc16_estimate dummy_reloc16_estimate
2775 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
2777 asection
*input_section
;
2779 unsigned int shrink
;
2780 struct bfd_link_info
*link_info
;
2787 #ifndef coff_reloc16_extra_cases
2788 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
2789 /* This works even if abort is not declared in any header file. */
2791 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
2794 struct bfd_link_info
*link_info
;
2795 struct bfd_link_order
*link_order
;
2798 unsigned int *src_ptr
;
2799 unsigned int *dst_ptr
;
2805 /* If coff_relocate_section is defined, we can use the optimized COFF
2806 backend linker. Otherwise we must continue to use the old linker. */
2807 #ifdef coff_relocate_section
2808 #ifndef coff_bfd_link_hash_table_create
2809 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
2811 #ifndef coff_bfd_link_add_symbols
2812 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
2814 #ifndef coff_bfd_final_link
2815 #define coff_bfd_final_link _bfd_coff_final_link
2817 #else /* ! defined (coff_relocate_section) */
2818 #define coff_relocate_section NULL
2819 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
2820 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
2821 #define coff_bfd_final_link _bfd_generic_final_link
2822 #endif /* ! defined (coff_relocate_section) */
2823 #define coff_bfd_link_split_section _bfd_generic_link_split_section
2825 #ifndef coff_start_final_link
2826 #define coff_start_final_link NULL
2829 #ifndef coff_adjust_symndx
2830 #define coff_adjust_symndx NULL
2833 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
2835 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
2836 coff_swap_aux_out
, coff_swap_sym_out
,
2837 coff_swap_lineno_out
, coff_swap_reloc_out
,
2838 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
2839 coff_swap_scnhdr_out
,
2840 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
2841 #ifdef COFF_LONG_FILENAMES
2846 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
2847 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
2848 coff_mkobject_hook
, styp_to_sec_flags
, coff_make_section_hook
,
2849 coff_set_alignment_hook
, coff_slurp_symbol_table
, symname_in_debug_hook
,
2850 coff_reloc16_extra_cases
, coff_reloc16_estimate
,
2851 coff_sym_is_global
, coff_compute_section_file_positions
,
2852 coff_start_final_link
, coff_relocate_section
, coff_rtype_to_howto
,
2856 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
2857 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
2858 #define coff_get_section_contents _bfd_generic_get_section_contents
2860 #define coff_bfd_copy_private_symbol_data \
2861 _bfd_generic_bfd_copy_private_symbol_data
2862 #define coff_bfd_copy_private_section_data \
2863 _bfd_generic_bfd_copy_private_section_data
2864 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
2865 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
2866 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
2868 #ifndef coff_bfd_print_private_bfd_data
2869 #define coff_bfd_print_private_bfd_data \
2870 _bfd_generic_bfd_print_private_bfd_data
2873 #ifndef coff_bfd_is_local_label
2874 #define coff_bfd_is_local_label bfd_generic_is_local_label
2876 #ifndef coff_read_minisymbols
2877 #define coff_read_minisymbols _bfd_generic_read_minisymbols
2879 #ifndef coff_minisymbol_to_symbol
2880 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2883 /* The reloc lookup routine must be supplied by each individual COFF
2885 #ifndef coff_bfd_reloc_type_lookup
2886 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
2889 #ifndef coff_bfd_get_relocated_section_contents
2890 #define coff_bfd_get_relocated_section_contents \
2891 bfd_generic_get_relocated_section_contents
2893 #ifndef coff_bfd_relax_section
2894 #define coff_bfd_relax_section bfd_generic_relax_section