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., 675 Mass Ave, Cambridge, MA 02139, 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;
305 #include "coffswap.h"
307 /* void warning(); */
310 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
311 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
312 * NOTE: If you add to/change this routine, you should mirror the changes
313 * in styp_to_sec_flags().
316 sec_to_styp_flags (sec_name
, sec_flags
)
317 CONST
char *sec_name
;
322 if (!strcmp (sec_name
, _TEXT
))
324 styp_flags
= STYP_TEXT
;
326 else if (!strcmp (sec_name
, _DATA
))
328 styp_flags
= STYP_DATA
;
331 else if (!strcmp (sec_name
, ".data2"))
333 styp_flags
= STYP_DATA
;
334 #endif /* TWO_DATA_SECS */
336 else if (!strcmp (sec_name
, _BSS
))
338 styp_flags
= STYP_BSS
;
341 else if (!strcmp (sec_name
, _COMMENT
))
343 styp_flags
= STYP_INFO
;
344 #endif /* _COMMENT */
347 else if (!strcmp (sec_name
, _LIB
))
349 styp_flags
= STYP_LIB
;
353 else if (!strcmp (sec_name
, _LIT
))
355 styp_flags
= STYP_LIT
;
358 else if (!strcmp (sec_name
, ".debug"))
361 styp_flags
= STYP_DEBUG
;
363 styp_flags
= STYP_INFO
;
366 else if (!strncmp (sec_name
, ".stab", 5))
368 styp_flags
= STYP_INFO
;
370 /* Try and figure out what it should be */
371 else if (sec_flags
& SEC_CODE
)
373 styp_flags
= STYP_TEXT
;
375 else if (sec_flags
& SEC_DATA
)
377 styp_flags
= STYP_DATA
;
379 else if (sec_flags
& SEC_READONLY
)
381 #ifdef STYP_LIT /* 29k readonly text/data section */
382 styp_flags
= STYP_LIT
;
384 styp_flags
= STYP_TEXT
;
385 #endif /* STYP_LIT */
387 else if (sec_flags
& SEC_LOAD
)
389 styp_flags
= STYP_TEXT
;
391 else if (sec_flags
& SEC_ALLOC
)
393 styp_flags
= STYP_BSS
;
397 if ((sec_flags
& (SEC_NEVER_LOAD
| SEC_COFF_SHARED_LIBRARY
)) != 0)
398 styp_flags
|= STYP_NOLOAD
;
404 * Return a word with SEC_* flags set to represent the incoming
405 * STYP_* flags (from scnhdr.s_flags). The inverse of this
406 * function is sec_to_styp_flags().
407 * NOTE: If you add to/change this routine, you should mirror the changes
408 * in sec_to_styp_flags().
411 styp_to_sec_flags (abfd
, hdr
, name
)
416 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
417 long styp_flags
= internal_s
->s_flags
;
418 flagword sec_flags
= 0;
421 if (styp_flags
& STYP_NOLOAD
)
423 sec_flags
|= SEC_NEVER_LOAD
;
425 #endif /* STYP_NOLOAD */
427 /* For 386 COFF, at least, an unloadable text or data section is
428 actually a shared library section. */
429 if (styp_flags
& STYP_TEXT
)
431 if (sec_flags
& SEC_NEVER_LOAD
)
432 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
434 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
436 else if (styp_flags
& STYP_DATA
)
438 if (sec_flags
& SEC_NEVER_LOAD
)
439 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
441 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
443 else if (styp_flags
& STYP_BSS
)
445 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
446 if (sec_flags
& SEC_NEVER_LOAD
)
447 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
450 sec_flags
|= SEC_ALLOC
;
452 else if (styp_flags
& STYP_INFO
)
454 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
455 defined. coff_compute_section_file_positions uses
456 COFF_PAGE_SIZE to ensure that the low order bits of the
457 section VMA and the file offset match. If we don't know
458 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
459 and demand page loading of the file will fail. */
460 #ifdef COFF_PAGE_SIZE
461 sec_flags
|= SEC_DEBUGGING
;
464 else if (strcmp (name
, _TEXT
) == 0)
466 if (sec_flags
& SEC_NEVER_LOAD
)
467 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
469 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
471 else if (strcmp (name
, _DATA
) == 0
473 || strcmp (name
, ".data2") == 0
477 if (sec_flags
& SEC_NEVER_LOAD
)
478 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
480 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
482 else if (strcmp (name
, _BSS
) == 0)
484 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
485 if (sec_flags
& SEC_NEVER_LOAD
)
486 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
489 sec_flags
|= SEC_ALLOC
;
491 else if (strcmp (name
, ".debug") == 0
493 || strcmp (name
, _COMMENT
) == 0
495 || strncmp (name
, ".stab", 5) == 0)
497 #ifdef COFF_PAGE_SIZE
498 sec_flags
|= SEC_DEBUGGING
;
502 else if (strcmp (name
, _LIB
) == 0)
506 else if (strcmp (name
, _LIT
) == 0)
508 sec_flags
= SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
;
513 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
516 #ifdef STYP_LIT /* A29k readonly text/data section type */
517 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
519 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
521 #endif /* STYP_LIT */
522 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
523 if (styp_flags
& STYP_OTHER_LOAD
)
525 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
527 #endif /* STYP_SDATA */
532 #define get_index(symbol) ((symbol)->udata.i)
536 bfd_coff_backend_data
540 Special entry points for gdb to swap in coff symbol table parts:
543 . void (*_bfd_coff_swap_aux_in) PARAMS ((
552 . void (*_bfd_coff_swap_sym_in) PARAMS ((
557 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
563 Special entry points for gas to swap out coff parts:
565 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
574 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
579 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
584 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
589 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
594 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
599 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
605 Special entry points for generic COFF routines to call target
606 dependent COFF routines:
608 . unsigned int _bfd_filhsz;
609 . unsigned int _bfd_aoutsz;
610 . unsigned int _bfd_scnhsz;
611 . unsigned int _bfd_symesz;
612 . unsigned int _bfd_auxesz;
613 . unsigned int _bfd_relsz;
614 . unsigned int _bfd_linesz;
615 . boolean _bfd_coff_long_filenames;
616 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
620 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
624 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
628 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
632 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
634 . PTR internal_filehdr));
635 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
637 . PTR internal_filehdr));
638 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
640 . PTR internal_filehdr,
641 . PTR internal_aouthdr));
642 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
644 . PTR internal_scnhdr,
645 . const char *name));
646 . asection *(*_bfd_make_section_hook) PARAMS ((
649 . void (*_bfd_set_alignment_hook) PARAMS ((
652 . PTR internal_scnhdr));
653 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
655 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
657 . struct internal_syment *sym));
658 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
660 . struct bfd_link_info *link_info,
661 . struct bfd_link_order *link_order,
664 . unsigned int *src_ptr,
665 . unsigned int *dst_ptr));
666 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
668 . asection *input_section,
670 . unsigned int shrink,
671 . struct bfd_link_info *link_info));
672 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
674 . struct internal_syment *));
675 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
677 . boolean (*_bfd_coff_relocate_section) PARAMS ((
679 . struct bfd_link_info *info,
681 . asection *input_section,
682 . bfd_byte *contents,
683 . struct internal_reloc *relocs,
684 . struct internal_syment *syms,
685 . asection **sections));
686 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
689 . struct internal_reloc *rel,
690 . struct coff_link_hash_entry *h,
691 . struct internal_syment *sym,
692 . bfd_vma *addendp));
693 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
695 . struct bfd_link_info *info,
698 . struct internal_reloc *reloc,
699 . boolean *adjustedp));
701 .} bfd_coff_backend_data;
703 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
705 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
706 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
708 .#define bfd_coff_swap_sym_in(a,e,i) \
709 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
711 .#define bfd_coff_swap_lineno_in(a,e,i) \
712 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
714 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
715 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
717 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
718 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
720 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
721 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
723 .#define bfd_coff_swap_sym_out(abfd, i,o) \
724 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
726 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
727 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
729 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
730 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
732 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
733 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
735 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
736 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
737 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
738 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
739 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
740 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
741 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
742 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
743 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
744 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
746 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
747 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
749 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
750 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
752 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
753 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
755 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
756 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
758 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
759 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
760 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
761 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
763 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
764 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
766 .#define bfd_coff_make_section_hook(abfd, name)\
767 . ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
769 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
770 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
772 .#define bfd_coff_slurp_symbol_table(abfd)\
773 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
775 .#define bfd_coff_symname_in_debug(abfd, sym)\
776 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
778 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
779 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
780 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
782 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
783 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
784 . (abfd, section, reloc, shrink, link_info))
786 .#define bfd_coff_sym_is_global(abfd, sym)\
787 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
790 .#define bfd_coff_compute_section_file_positions(abfd)\
791 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
794 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
795 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
796 . (obfd, info, ibfd, o, con, rel, isyms, secs))
797 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
798 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
799 . (abfd, sec, rel, h, sym, addendp))
800 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
801 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
802 . (obfd, info, ibfd, sec, rel, adjustedp))
806 /* See whether the magic number matches. */
809 coff_bad_format_hook (abfd
, filehdr
)
813 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
815 if (BADMAG (*internal_f
))
818 /* if the optional header is NULL or not the correct size then
819 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
820 and Intel 960 readwrite headers (I960WRMAGIC) is that the
821 optional header is of a different size.
823 But the mips keeps extra stuff in it's opthdr, so dont check
827 #if defined(M88) || defined(I960)
828 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
836 coff_make_section_hook (abfd
, name
)
841 /* FIXME: This predates the call to bfd_make_section_anyway
842 in make_a_section_from_file, and can probably go away. */
843 /* On SCO a file created by the Microsoft assembler can have two
844 .data sections. We use .data2 for the second one. */
845 if (strcmp (name
, _DATA
) == 0)
846 return bfd_make_section (abfd
, ".data2");
848 return (asection
*) NULL
;
852 initialize a section structure with information peculiar to this
853 particular implementation of coff
857 coff_new_section_hook (abfd
, section
)
861 section
->alignment_power
= COFF_DEFAULT_SECTION_ALIGNMENT_POWER
;
863 /* Allocate aux records for section symbols, to store size and
866 @@ Shouldn't use constant multiplier here! */
867 coffsymbol (section
->symbol
)->native
=
868 (combined_entry_type
*) bfd_zalloc (abfd
,
869 sizeof (combined_entry_type
) * 10);
871 /* The .stab section must be aligned to 2**2 at most, because
872 otherwise there may be gaps in the section which gdb will not
873 know how to interpret. Examining the section name is a hack, but
874 that is also how gdb locates the section. We also align the
875 .stabstr section this way for backward compatibility, although I
876 believe it would work anyhow. */
877 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 2
878 && (strncmp (section
->name
, ".stab", 5) == 0))
879 section
->alignment_power
= 2;
886 /* Set the alignment of a BFD section. */
889 coff_set_alignment_hook (abfd
, section
, scnhdr
)
894 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
897 for (i
= 0; i
< 32; i
++)
898 if ((1 << i
) >= hdr
->s_align
)
900 section
->alignment_power
= i
;
905 #define coff_set_alignment_hook \
906 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
914 coff_data_type
*coff
;
916 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*) bfd_zalloc (abfd
, sizeof (coff_data_type
));
917 if (abfd
->tdata
.coff_obj_data
== 0)
919 bfd_set_error (bfd_error_no_memory
);
922 coff
= coff_data (abfd
);
923 coff
->symbols
= (coff_symbol_type
*) NULL
;
924 coff
->conversion_table
= (unsigned int *) NULL
;
925 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
927 /* make_abs_section(abfd);*/
935 /* Create the COFF backend specific information. */
938 coff_mkobject_hook (abfd
, filehdr
, aouthdr
)
943 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
944 coff_data_type
*coff
;
946 if (coff_mkobject (abfd
) == false)
949 coff
= coff_data (abfd
);
951 coff
->sym_filepos
= internal_f
->f_symptr
;
953 /* These members communicate important constants about the symbol
954 table to GDB's symbol-reading code. These `constants'
955 unfortunately vary among coff implementations... */
956 coff
->local_n_btmask
= N_BTMASK
;
957 coff
->local_n_btshft
= N_BTSHFT
;
958 coff
->local_n_tmask
= N_TMASK
;
959 coff
->local_n_tshift
= N_TSHIFT
;
960 coff
->local_symesz
= SYMESZ
;
961 coff
->local_auxesz
= AUXESZ
;
962 coff
->local_linesz
= LINESZ
;
964 obj_raw_syment_count (abfd
) =
965 obj_conv_table_size (abfd
) =
971 /* Determine the machine architecture and type. FIXME: This is target
972 dependent because the magic numbers are defined in the target
973 dependent header files. But there is no particular need for this.
974 If the magic numbers were moved to a separate file, this function
975 would be target independent and would also be much more successful
976 at linking together COFF files for different architectures. */
979 coff_set_arch_mach_hook (abfd
, filehdr
)
984 enum bfd_architecture arch
;
985 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
988 switch (internal_f
->f_magic
)
993 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
994 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
995 arch
= bfd_arch_i386
;
999 #ifdef A29K_MAGIC_BIG
1000 case A29K_MAGIC_BIG
:
1001 case A29K_MAGIC_LITTLE
:
1002 arch
= bfd_arch_a29k
;
1008 arch
= bfd_arch_arm
;
1015 #ifdef MC68KBCSMAGIC
1018 #ifdef APOLLOM68KMAGIC
1019 case APOLLOM68KMAGIC
:
1021 #ifdef LYNXCOFFMAGIC
1024 arch
= bfd_arch_m68k
;
1032 arch
= bfd_arch_m88k
;
1038 arch
= bfd_arch_z8k
;
1039 switch (internal_f
->f_flags
& F_MACHMASK
)
1042 machine
= bfd_mach_z8001
;
1045 machine
= bfd_mach_z8002
;
1056 arch
= bfd_arch_i960
;
1057 switch (F_I960TYPE
& internal_f
->f_flags
)
1061 machine
= bfd_mach_i960_core
;
1064 machine
= bfd_mach_i960_kb_sb
;
1067 machine
= bfd_mach_i960_mc
;
1070 machine
= bfd_mach_i960_xa
;
1073 machine
= bfd_mach_i960_ca
;
1076 machine
= bfd_mach_i960_ka_sa
;
1078 /* start-sanitize-i960xl */
1080 machine
= bfd_mach_i960_xl
;
1082 /* end-sanitize-i960xl */
1092 arch
= bfd_arch_rs6000
;
1099 arch
= bfd_arch_we32k
;
1106 arch
= bfd_arch_h8300
;
1107 machine
= bfd_mach_h8300
;
1108 /* !! FIXME this probably isn't the right place for this */
1109 abfd
->flags
|= BFD_IS_RELAXABLE
;
1115 arch
= bfd_arch_h8300
;
1116 machine
= bfd_mach_h8300h
;
1117 /* !! FIXME this probably isn't the right place for this */
1118 abfd
->flags
|= BFD_IS_RELAXABLE
;
1122 #ifdef SH_ARCH_MAGIC_BIG
1123 case SH_ARCH_MAGIC_BIG
:
1124 case SH_ARCH_MAGIC_LITTLE
:
1132 arch
= bfd_arch_h8500
;
1139 #ifdef LYNXCOFFMAGIC
1142 arch
= bfd_arch_sparc
;
1147 default: /* Unreadable input file type */
1148 arch
= bfd_arch_obscure
;
1152 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1156 #ifdef SYMNAME_IN_DEBUG
1159 symname_in_debug_hook (abfd
, sym
)
1161 struct internal_syment
*sym
;
1163 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1168 #define symname_in_debug_hook \
1169 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1177 To write relocations, the back end steps though the
1178 canonical relocation table and create an
1179 @code{internal_reloc}. The symbol index to use is removed from
1180 the @code{offset} field in the symbol table supplied. The
1181 address comes directly from the sum of the section base
1182 address and the relocation offset; the type is dug directly
1183 from the howto field. Then the @code{internal_reloc} is
1184 swapped into the shape of an @code{external_reloc} and written
1190 coff_write_relocs (abfd
, first_undef
)
1195 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1198 struct external_reloc dst
;
1200 arelent
**p
= s
->orelocation
;
1201 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1203 for (i
= 0; i
< s
->reloc_count
; i
++)
1205 struct internal_reloc n
;
1207 memset ((PTR
) & n
, 0, sizeof (n
));
1209 /* Now we've renumbered the symbols we know where the
1210 undefined symbols live in the table. Check the reloc
1211 entries for symbols who's output bfd isn't the right one.
1212 This is because the symbol was undefined (which means
1213 that all the pointers are never made to point to the same
1214 place). This is a bad thing,'cause the symbols attached
1215 to the output bfd are indexed, so that the relocation
1216 entries know which symbol index they point to. So we
1217 have to look up the output symbol here. */
1219 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1222 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1223 asymbol
**outsyms
= abfd
->outsymbols
;
1224 for (i
= first_undef
; outsyms
[i
]; i
++)
1226 const char *intable
= outsyms
[i
]->name
;
1227 if (strcmp (intable
, sname
) == 0) {
1228 /* got a hit, so repoint the reloc */
1229 q
->sym_ptr_ptr
= outsyms
+ i
;
1235 n
.r_vaddr
= q
->address
+ s
->vma
;
1238 /* The 29k const/consth reloc pair is a real kludge. The consth
1239 part doesn't have a symbol; it has an offset. So rebuilt
1241 if (q
->howto
->type
== R_IHCONST
)
1242 n
.r_symndx
= q
->addend
;
1247 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1248 /* This is a relocation relative to the absolute symbol. */
1252 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1253 /* Take notice if the symbol reloc points to a symbol
1254 we don't have in our symbol table. What should we
1256 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1261 #ifdef SWAP_OUT_RELOC_OFFSET
1262 n
.r_offset
= q
->addend
;
1266 /* Work out reloc type from what is required */
1267 SELECT_RELOC (n
, q
->howto
);
1269 n
.r_type
= q
->howto
->type
;
1271 coff_swap_reloc_out (abfd
, &n
, &dst
);
1272 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1280 /* Set flags and magic number of a coff file from architecture and machine
1281 type. Result is true if we can represent the arch&type, false if not. */
1284 coff_set_flags (abfd
, magicp
, flagsp
)
1287 unsigned short *flagsp
;
1289 switch (bfd_get_arch (abfd
))
1294 switch (bfd_get_mach (abfd
))
1296 case bfd_mach_z8001
:
1299 case bfd_mach_z8002
:
1313 *magicp
= I960ROMAGIC
;
1315 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1316 I960RWMAGIC); FIXME???
1318 switch (bfd_get_mach (abfd
))
1320 case bfd_mach_i960_core
:
1323 case bfd_mach_i960_kb_sb
:
1326 case bfd_mach_i960_mc
:
1329 case bfd_mach_i960_xa
:
1332 case bfd_mach_i960_ca
:
1335 case bfd_mach_i960_ka_sa
:
1338 /* start-sanitize-i960xl */
1339 case bfd_mach_i960_xl
:
1342 /* end-sanitize-i960xl */
1358 *magicp
= I386MAGIC
;
1360 /* Just overwrite the usual value if we're doing Lynx. */
1361 *magicp
= LYNXCOFFMAGIC
;
1368 #ifdef APOLLOM68KMAGIC
1369 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1371 *magicp
= MC68MAGIC
;
1374 /* Just overwrite the usual value if we're doing Lynx. */
1375 *magicp
= LYNXCOFFMAGIC
;
1383 *magicp
= MC88OMAGIC
;
1388 case bfd_arch_h8300
:
1389 switch (bfd_get_mach (abfd
))
1391 case bfd_mach_h8300
:
1392 *magicp
= H8300MAGIC
;
1394 case bfd_mach_h8300h
:
1395 *magicp
= H8300HMAGIC
;
1401 #ifdef SH_ARCH_MAGIC_BIG
1403 if (abfd
->xvec
->byteorder_big_p
)
1404 *magicp
= SH_ARCH_MAGIC_BIG
;
1406 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1412 case bfd_arch_sparc
:
1413 *magicp
= SPARCMAGIC
;
1415 /* Just overwrite the usual value if we're doing Lynx. */
1416 *magicp
= LYNXCOFFMAGIC
;
1423 case bfd_arch_h8500
:
1424 *magicp
= H8500MAGIC
;
1428 #ifdef A29K_MAGIC_BIG
1430 if (abfd
->xvec
->byteorder_big_p
)
1431 *magicp
= A29K_MAGIC_BIG
;
1433 *magicp
= A29K_MAGIC_LITTLE
;
1439 case bfd_arch_we32k
:
1440 *magicp
= WE32KMAGIC
;
1446 case bfd_arch_rs6000
:
1447 case bfd_arch_powerpc
:
1448 *magicp
= U802TOCMAGIC
;
1453 default: /* Unknown architecture */
1454 /* return false; -- fall through to "return false" below, to avoid
1455 "statement never reached" errors on the one below. */
1464 coff_set_arch_mach (abfd
, arch
, machine
)
1466 enum bfd_architecture arch
;
1467 unsigned long machine
;
1470 unsigned short dummy2
;
1472 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
1475 if (arch
!= bfd_arch_unknown
&&
1476 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
1477 return false; /* We can't represent this type */
1479 return true; /* We're easy ... */
1483 /* Calculate the file position for each section. */
1486 coff_compute_section_file_positions (abfd
)
1490 asection
*previous
= (asection
*) NULL
;
1491 file_ptr sofar
= FILHSZ
;
1497 if (bfd_get_start_address (abfd
))
1499 /* A start address may have been added to the original file. In this
1500 case it will need an optional header to record it. */
1501 abfd
->flags
|= EXEC_P
;
1504 if (abfd
->flags
& EXEC_P
)
1507 sofar
+= abfd
->section_count
* SCNHSZ
;
1508 for (current
= abfd
->sections
, count
= 1;
1509 current
!= (asection
*) NULL
;
1510 current
= current
->next
, ++count
)
1512 current
->target_index
= count
;
1514 /* Only deal with sections which have contents */
1515 if (!(current
->flags
& SEC_HAS_CONTENTS
))
1519 /* Do not include the .junk section. This is where we collect section
1520 data which we don't need. This is mainly the MS .debug$ data which
1521 stores codeview debug data. */
1522 if (strcmp (current
->name
, ".junk") == 0)
1528 /* Align the sections in the file to the same boundary on
1529 which they are aligned in virtual memory. I960 doesn't
1530 do this (FIXME) so we can stay in sync with Intel. 960
1531 doesn't yet page from files... */
1534 /* make sure this section is aligned on the right boundary - by
1535 padding the previous section up if necessary */
1538 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1539 if (previous
!= (asection
*) NULL
)
1541 previous
->_raw_size
+= sofar
- old_sofar
;
1547 #ifdef COFF_PAGE_SIZE
1548 /* In demand paged files the low order bits of the file offset
1549 must match the low order bits of the virtual address. */
1550 if ((abfd
->flags
& D_PAGED
) != 0
1551 && (current
->flags
& SEC_ALLOC
) != 0)
1552 sofar
+= (current
->vma
- sofar
) % COFF_PAGE_SIZE
;
1555 current
->filepos
= sofar
;
1557 sofar
+= current
->_raw_size
;
1559 /* make sure that this section is of the right size too */
1561 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1562 current
->_raw_size
+= sofar
- old_sofar
;
1566 /* Force .lib sections to start at zero. The vma is then
1567 incremented in coff_set_section_contents. This is right for
1569 if (strcmp (current
->name
, _LIB
) == 0)
1570 bfd_set_section_vma (abfd
, current
, 0);
1576 /* Normally, the starting location for the symbol table will be at the end
1577 of the last section. However, when dealing with NT, the last section
1578 must be as long as its size rounded up to the next page (0x1000). */
1579 sofar
= ((sofar
+ NT_FILE_ALIGNMENT
- 1) /
1580 NT_FILE_ALIGNMENT
) * NT_FILE_ALIGNMENT
;
1583 obj_relocbase (abfd
) = sofar
;
1584 abfd
->output_has_begun
= true;
1588 #ifndef RS6000COFF_C
1590 /* If .file, .text, .data, .bss symbols are missing, add them. */
1591 /* @@ Should we only be adding missing symbols, or overriding the aux
1592 values for existing section symbols? */
1594 coff_add_missing_symbols (abfd
)
1597 unsigned int nsyms
= bfd_get_symcount (abfd
);
1598 asymbol
**sympp
= abfd
->outsymbols
;
1601 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
1603 for (i
= 0; i
< nsyms
; i
++)
1605 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
1609 /* only do this if there is a coff representation of the input
1611 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
1616 name
= csym
->symbol
.name
;
1619 if (!strcmp (name
, _TEXT
))
1622 else if (!strcmp (name
, ".wtext"))
1625 else if (!strcmp (name
, _DATA
))
1627 else if (!strcmp (name
, _BSS
))
1631 /* Now i == bfd_get_symcount (abfd). */
1632 /* @@ For now, don't deal with .file symbol. */
1635 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
1637 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
1638 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
1641 bfd_set_error (bfd_error_no_memory
);
1644 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
1647 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1651 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
1653 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
1655 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
1656 BFD_ASSERT (i
== nsyms
);
1657 bfd_set_symtab (abfd
, sympp2
, nsyms
);
1661 #endif /* ! defined (RS6000COFF_C) */
1664 static void add_data_entry (abfd
, aout
, idx
, name
)
1666 struct internal_aouthdr
*aout
;
1670 asection
*sec
= bfd_get_section_by_name (abfd
, name
);
1672 /* add import directory information if it exists */
1675 aout
->DataDirectory
[idx
].VirtualAddress
= sec
->lma
- NT_IMAGE_BASE
;
1676 aout
->DataDirectory
[idx
].Size
= sec
->_raw_size
;
1684 coff_write_object_contents (abfd
)
1688 boolean hasrelocs
= false;
1689 boolean haslinno
= false;
1690 file_ptr reloc_base
;
1691 file_ptr lineno_base
;
1693 unsigned long reloc_size
= 0;
1694 unsigned long lnno_size
= 0;
1695 asection
*text_sec
= NULL
;
1696 asection
*data_sec
= NULL
;
1697 asection
*bss_sec
= NULL
;
1698 bfd_vma end_of_image
= 0;
1700 struct internal_filehdr internal_f
;
1701 struct internal_aouthdr internal_a
;
1703 bfd_set_error (bfd_error_system_call
);
1705 if (abfd
->output_has_begun
== false)
1706 coff_compute_section_file_positions (abfd
);
1708 reloc_base
= obj_relocbase (abfd
);
1710 /* Make a pass through the symbol table to count line number entries and
1711 put them into the correct asections */
1713 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
1715 /* Work out the size of the reloc and linno areas */
1717 for (current
= abfd
->sections
; current
!= NULL
; current
=
1719 reloc_size
+= current
->reloc_count
* RELSZ
;
1721 lineno_base
= reloc_base
+ reloc_size
;
1722 sym_base
= lineno_base
+ lnno_size
;
1724 /* Indicate in each section->line_filepos its actual file address */
1725 for (current
= abfd
->sections
; current
!= NULL
; current
=
1728 if (current
->lineno_count
)
1730 current
->line_filepos
= lineno_base
;
1731 current
->moving_line_filepos
= lineno_base
;
1732 lineno_base
+= current
->lineno_count
* LINESZ
;
1736 current
->line_filepos
= 0;
1738 if (current
->reloc_count
)
1740 current
->rel_filepos
= reloc_base
;
1741 reloc_base
+= current
->reloc_count
* RELSZ
;
1745 current
->rel_filepos
= 0;
1749 /* Write section headers to the file. */
1750 internal_f
.f_nscns
= 0;
1754 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1755 (EXTRA_NT_HDRSZ
+ FILHSZ
+ AOUTSZ
) :
1756 (EXTRA_NT_HDRSZ
+ FILHSZ
)),
1761 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1762 (FILHSZ
+ AOUTSZ
) : FILHSZ
),
1769 for (current
= abfd
->sections
;
1771 current
= current
->next
)
1773 struct internal_scnhdr section
;
1776 /* Do not include the .junk section. This is where we collect section
1777 data which we don't need. This is mainly the MS .debug$ data which
1778 stores codeview debug data. */
1779 if (strcmp (current
->name
, ".junk") == 0)
1784 internal_f
.f_nscns
++;
1785 strncpy (&(section
.s_name
[0]), current
->name
, 8);
1787 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1788 Ian Taylor <ian@cygnus.com>. */
1789 if (strcmp (current
->name
, _LIB
) == 0)
1790 section
.s_vaddr
= 0;
1793 section
.s_vaddr
= current
->lma
;
1794 section
.s_paddr
= current
->lma
;
1795 section
.s_size
= current
->_raw_size
;
1797 /* Remember the address of the end of the last section */
1799 if (current
->lma
+ current
->_raw_size
> end_of_image
)
1800 end_of_image
= current
->lma
+ current
->_raw_size
;
1803 If this section has no size or is unloadable then the scnptr
1806 if (current
->_raw_size
== 0 ||
1807 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
1809 section
.s_scnptr
= 0;
1813 section
.s_scnptr
= current
->filepos
;
1815 section
.s_relptr
= current
->rel_filepos
;
1816 section
.s_lnnoptr
= current
->line_filepos
;
1817 section
.s_nreloc
= current
->reloc_count
;
1818 section
.s_nlnno
= current
->lineno_count
;
1819 if (current
->reloc_count
!= 0)
1821 if (current
->lineno_count
!= 0)
1824 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
1826 if (!strcmp (current
->name
, _TEXT
))
1830 else if (!strcmp (current
->name
, _DATA
))
1833 #ifdef TWO_DATA_SECS
1835 else if (!strcmp (current
->name
, ".data2"))
1838 #endif /* TWO_DATA_SECS */
1840 else if (!strcmp (current
->name
, _BSS
))
1846 section
.s_align
= (current
->alignment_power
1847 ? 1 << current
->alignment_power
1855 /* suppress output of the sections if they are null. ld includes
1856 the bss and data sections even if there is no size assigned
1857 to them. NT loader doesn't like it if these section headers are
1858 included if the sections themselves are not needed */
1859 if (section
.s_size
== 0)
1860 internal_f
.f_nscns
--;
1863 coff_swap_scnhdr_out (abfd
, §ion
, &buff
);
1864 if (bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
1868 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
1869 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
1878 /* OK, now set up the filehdr... */
1880 /* Don't include the internal abs section in the section count */
1883 We will NOT put a fucking timestamp in the header here. Every time you
1884 put it back, I will come in and take it out again. I'm sorry. This
1885 field does not belong here. We fill it with a 0 so it compares the
1886 same but is not a reasonable time. -- gnu@cygnus.com
1888 internal_f
.f_timdat
= 0;
1890 internal_f
.f_flags
= 0;
1892 if (abfd
->flags
& EXEC_P
)
1893 internal_f
.f_opthdr
= AOUTSZ
;
1895 internal_f
.f_opthdr
= 0;
1898 internal_f
.f_flags
|= F_RELFLG
;
1900 internal_f
.f_flags
|= F_LNNO
;
1901 if (abfd
->flags
& EXEC_P
)
1902 internal_f
.f_flags
|= F_EXEC
;
1904 if (!abfd
->xvec
->byteorder_big_p
)
1905 internal_f
.f_flags
|= F_AR32WR
;
1907 internal_f
.f_flags
|= F_AR32W
;
1910 /* assign other filehdr fields for DOS header and NT signature */
1911 internal_f
.e_magic
= DOSMAGIC
;
1912 internal_f
.e_cblp
= 0x90;
1913 internal_f
.e_cp
= 0x3;
1914 internal_f
.e_crlc
= 0x0;
1915 internal_f
.e_cparhdr
= 0x4;
1916 internal_f
.e_minalloc
= 0x0;
1917 internal_f
.e_maxalloc
= 0xffff;
1918 internal_f
.e_ss
= 0x0;
1919 internal_f
.e_sp
= 0xb8;
1920 internal_f
.e_csum
= 0x0;
1921 internal_f
.e_ip
= 0x0;
1922 internal_f
.e_cs
= 0x0;
1923 internal_f
.e_lfarlc
= 0x40;
1924 internal_f
.e_ovno
= 0x0;
1927 for (idx
=0; idx
< 4; idx
++)
1928 internal_f
.e_res
[idx
] = 0x0;
1930 internal_f
.e_oemid
= 0x0;
1931 internal_f
.e_oeminfo
= 0x0;
1934 for (idx
=0; idx
< 10; idx
++)
1935 internal_f
.e_res2
[idx
] = 0x0;
1937 internal_f
.e_lfanew
= 0x80;
1939 /* this next collection of data are mostly just characters. It appears
1940 to be constant within the headers put on NT exes */
1941 internal_f
.dos_message
[0] = 0x0eba1f0e;
1942 internal_f
.dos_message
[1] = 0xcd09b400;
1943 internal_f
.dos_message
[2] = 0x4c01b821;
1944 internal_f
.dos_message
[3] = 0x685421cd;
1945 internal_f
.dos_message
[4] = 0x70207369;
1946 internal_f
.dos_message
[5] = 0x72676f72;
1947 internal_f
.dos_message
[6] = 0x63206d61;
1948 internal_f
.dos_message
[7] = 0x6f6e6e61;
1949 internal_f
.dos_message
[8] = 0x65622074;
1950 internal_f
.dos_message
[9] = 0x6e757220;
1951 internal_f
.dos_message
[10] = 0x206e6920;
1952 internal_f
.dos_message
[11] = 0x20534f44;
1953 internal_f
.dos_message
[12] = 0x65646f6d;
1954 internal_f
.dos_message
[13] = 0x0a0d0d2e;
1955 internal_f
.dos_message
[14] = 0x24;
1956 internal_f
.dos_message
[15] = 0x0;
1957 internal_f
.nt_signature
= NT_SIGNATURE
;
1962 FIXME, should do something about the other byte orders and
1966 memset (&internal_a
, 0, sizeof internal_a
);
1968 /* Set up architecture-dependent stuff */
1971 unsigned int magic
= 0;
1972 unsigned short flags
= 0;
1973 coff_set_flags (abfd
, &magic
, &flags
);
1974 internal_f
.f_magic
= magic
;
1975 internal_f
.f_flags
|= flags
;
1976 /* ...and the "opt"hdr... */
1979 #ifdef ULTRA3 /* NYU's machine */
1980 /* FIXME: This is a bogus check. I really want to see if there
1981 * is a .shbss or a .shdata section, if so then set the magic
1982 * number to indicate a shared data executable.
1984 if (internal_f
.f_nscns
>= 7)
1985 internal_a
.magic
= SHMAGIC
; /* Shared magic */
1988 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
1989 #define __A_MAGIC_SET__
1992 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
1993 #define __A_MAGIC_SET__
1996 #define __A_MAGIC_SET__
1997 internal_a
.magic
= PAGEMAGICBCS
;
2001 #define __A_MAGIC_SET__
2002 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2005 #if defined(M68) || defined(WE32K) || defined(M68K)
2006 #define __A_MAGIC_SET__
2008 internal_a
.magic
= LYNXCOFFMAGIC
;
2010 #endif /* M68 || WE32K || M68K */
2013 #define __A_MAGIC_SET__
2014 internal_a
.magic
= ZMAGIC
;
2017 #define __A_MAGIC_SET__
2019 internal_a
.magic
= LYNXCOFFMAGIC
;
2021 internal_a
.magic
= ZMAGIC
;
2026 #define __A_MAGIC_SET__
2028 internal_a
.magic
= LYNXCOFFMAGIC
;
2033 #define __A_MAGIC_SET__
2034 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2035 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2036 RS6K_AOUTHDR_OMAGIC
;
2039 #ifndef __A_MAGIC_SET__
2040 #include "Your aouthdr magic number is not being set!"
2042 #undef __A_MAGIC_SET__
2045 /* Now should write relocs, strings, syms */
2046 obj_sym_filepos (abfd
) = sym_base
;
2048 if (bfd_get_symcount (abfd
) != 0)
2051 #ifndef RS6000COFF_C
2052 if (!coff_add_missing_symbols (abfd
))
2055 if (!coff_renumber_symbols (abfd
, &firstundef
))
2057 coff_mangle_symbols (abfd
);
2058 if (! coff_write_symbols (abfd
))
2060 if (! coff_write_linenumbers (abfd
))
2062 if (! coff_write_relocs (abfd
, firstundef
))
2066 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2067 backend linker, and obj_raw_syment_count is not valid until after
2068 coff_write_symbols is called. */
2069 if (obj_raw_syment_count (abfd
) != 0)
2070 internal_f
.f_symptr
= sym_base
;
2073 internal_f
.f_symptr
= 0;
2074 internal_f
.f_flags
|= F_LSYMS
;
2079 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2080 internal_a
.text_start
= internal_a
.tsize
?
2081 (text_sec
->vma
- IMAGE_BASE
) : 0;
2085 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2086 internal_a
.data_start
= internal_a
.dsize
?
2087 (data_sec
->vma
- IMAGE_BASE
) : 0;
2091 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2094 internal_a
.entry
= bfd_get_start_address (abfd
) - IMAGE_BASE
;
2095 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2097 #ifdef COFF_WITH_PE /* write all of the other optional header data */
2098 /* Note; the entries for subsystem, stack reserve, stack commit, heap reserve
2099 and heap commit may be supplied on the command line via the -subsystem,
2100 -stack and/or -heap switches. This data is initially stored in variable
2101 link_info. This is eventually passed to the bfd (from ld) in (cofflink.c)
2102 _bfd_coff_final_link. Once this function gets it, we copy it into variables
2103 NT_subsystem and NT_stack_heap which are defined in internal.h. With
2104 respect to the stack/heap reserve/commit parameters, if nothing has been
2105 defined for these, the input values will be '0' (i.e. the values stored
2106 in NT_stack_heap) will be 0. */
2108 internal_a
.ImageBase
= NT_IMAGE_BASE
; /* 0x400000 */
2109 internal_a
.SectionAlignment
= NT_SECTION_ALIGNMENT
; /* 0x1000 */
2110 internal_a
.FileAlignment
= NT_FILE_ALIGNMENT
; /* 0x200 */
2111 internal_a
.MajorOperatingSystemVersion
= 1;
2112 internal_a
.MinorOperatingSystemVersion
= 0;
2113 internal_a
.MajorImageVersion
= 0;
2114 internal_a
.MinorImageVersion
= 0;
2115 internal_a
.MajorSubsystemVersion
= 3;
2116 internal_a
.MinorSubsystemVersion
= 0xA;
2117 internal_a
.Reserved1
= 0;
2118 /* Virtual start address, take virtual start address of last section,
2119 add its physical size and round up the next page (NT_SECTION_ALIGNMENT).
2120 An assumption has been made that the sections stored in the abfd
2121 structure are in order and that I have successfully saved the last
2122 section's address and size. */
2124 internal_a
.SizeOfImage
=
2125 (end_of_image
- NT_IMAGE_BASE
+ NT_SECTION_ALIGNMENT
- 1)
2126 & ~ (NT_SECTION_ALIGNMENT
-1);
2128 /* Start of .text section will do here since it is the first section after
2129 the headers. Note that NT_IMAGE_BASE has already been removed above */
2130 internal_a
.SizeOfHeaders
= internal_a
.text_start
;
2131 internal_a
.CheckSum
= 0;
2132 switch (NT_subsystem
)
2134 /* The possible values are:
2135 1 - NATIVE Doesn't require a subsystem
2136 2 - WINDOWS_GUI runs in Windows GUI subsystem
2137 3 - WINDOWS_CUI runs in Windows char sub. (console app)
2138 5 - OS2_CUI runs in OS/2 character subsystem
2139 7 - POSIX_CUI runs in Posix character subsystem */
2141 internal_a
.Subsystem
= 1;
2144 internal_a
.Subsystem
= 2;
2147 internal_a
.Subsystem
= 3;
2150 internal_a
.Subsystem
= 5;
2153 internal_a
.Subsystem
= 7;
2156 internal_a
.Subsystem
= 3;
2158 internal_a
.DllCharacteristics
= 0;
2159 if (NT_stack_heap
.stack_defined
)
2161 internal_a
.SizeOfStackReserve
= NT_stack_heap
.stack_reserve
;
2162 /* since commit is an optional parameter, verify that it is non-zero */
2163 if (NT_stack_heap
.stack_commit
> 0)
2164 internal_a
.SizeOfStackCommit
= NT_stack_heap
.stack_commit
;
2166 internal_a
.SizeOfStackCommit
= NT_DEF_COMMIT
;
2170 internal_a
.SizeOfStackReserve
= NT_DEF_RESERVE
; /* 0x100000 */
2171 internal_a
.SizeOfStackCommit
= NT_DEF_COMMIT
; /* 0x1000 */
2173 if (NT_stack_heap
.heap_defined
)
2175 internal_a
.SizeOfHeapReserve
= NT_stack_heap
.heap_reserve
;
2176 /* since commit is an optional parameter, verify that it is non-zero */
2177 if (NT_stack_heap
.heap_commit
> 0)
2178 internal_a
.SizeOfHeapCommit
= NT_stack_heap
.heap_commit
;
2180 internal_a
.SizeOfHeapCommit
= NT_DEF_COMMIT
;
2184 internal_a
.SizeOfHeapReserve
= NT_DEF_RESERVE
; /* 0x100000 */
2185 internal_a
.SizeOfHeapCommit
= NT_DEF_COMMIT
; /* 0x1000 */
2187 internal_a
.LoaderFlags
= 0;
2188 internal_a
.NumberOfRvaAndSizes
= IMAGE_NUMBEROF_DIRECTORY_ENTRIES
; /* 0x10 */
2190 /* first null out all data directory entries .. */
2191 memset (internal_a
.DataDirectory
, sizeof (internal_a
.DataDirectory
), 0);
2193 add_data_entry (abfd
, &internal_a
, 0, ".edata");
2194 add_data_entry (abfd
, &internal_a
, 1, ".idata");
2195 add_data_entry (abfd
, &internal_a
, 2, ".rsrc");
2196 add_data_entry (abfd
, &internal_a
, 5, ".reloc");
2202 /* now write them */
2203 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2207 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) & buff
);
2208 if (bfd_write ((PTR
) & buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2211 if (abfd
->flags
& EXEC_P
)
2214 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) & buff
);
2215 if (bfd_write ((PTR
) & buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2223 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2228 bfd_size_type count
;
2230 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
2231 coff_compute_section_file_positions (abfd
);
2234 /* If this is a .lib section, bump the vma address so that it
2235 winds up being the number of .lib sections output. This is
2236 right for SVR3.2. Shared libraries should probably get more
2237 generic support. Ian Taylor <ian@cygnus.com>. */
2238 if (strcmp (section
->name
, _LIB
) == 0)
2242 /* Don't write out bss sections - one way to do this is to
2243 see if the filepos has not been set. */
2244 if (section
->filepos
== 0)
2247 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
2252 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
2258 coff_close_and_cleanup (abfd
)
2261 if (!bfd_read_p (abfd
))
2262 switch (abfd
->format
)
2265 if (!_bfd_write_archive_contents (abfd
))
2269 if (!coff_write_object_contents (abfd
))
2273 bfd_set_error (bfd_error_invalid_operation
);
2277 /* We depend on bfd_close to free all the memory on the obstack. */
2278 /* FIXME if bfd_release is not using obstacks! */
2285 buy_and_read (abfd
, where
, seek_direction
, size
)
2291 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
2294 bfd_set_error (bfd_error_no_memory
);
2297 if (bfd_seek (abfd
, where
, seek_direction
) != 0
2298 || bfd_read (area
, 1, size
, abfd
) != size
)
2301 } /* buy_and_read() */
2307 Creating the linenumber table is done by reading in the entire
2308 coff linenumber table, and creating another table for internal use.
2310 A coff linenumber table is structured so that each function
2311 is marked as having a line number of 0. Each line within the
2312 function is an offset from the first line in the function. The
2313 base of the line number information for the table is stored in
2314 the symbol associated with the function.
2316 The information is copied from the external to the internal
2317 table, and each symbol which marks a function is marked by
2320 How does this work ?
2325 coff_slurp_line_table (abfd
, asect
)
2329 LINENO
*native_lineno
;
2330 alent
*lineno_cache
;
2332 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
2334 native_lineno
= (LINENO
*) buy_and_read (abfd
,
2335 asect
->line_filepos
,
2338 asect
->lineno_count
));
2340 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
2341 if (lineno_cache
== NULL
)
2343 bfd_set_error (bfd_error_no_memory
);
2348 unsigned int counter
= 0;
2349 alent
*cache_ptr
= lineno_cache
;
2350 LINENO
*src
= native_lineno
;
2352 while (counter
< asect
->lineno_count
)
2354 struct internal_lineno dst
;
2355 coff_swap_lineno_in (abfd
, src
, &dst
);
2356 cache_ptr
->line_number
= dst
.l_lnno
;
2358 if (cache_ptr
->line_number
== 0)
2360 coff_symbol_type
*sym
=
2361 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
2362 + obj_raw_syments (abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
2363 cache_ptr
->u
.sym
= (asymbol
*) sym
;
2364 sym
->lineno
= cache_ptr
;
2368 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
2369 - bfd_section_vma (abfd
, asect
);
2370 } /* If no linenumber expect a symbol index */
2376 cache_ptr
->line_number
= 0;
2379 asect
->lineno
= lineno_cache
;
2380 /* FIXME, free native_lineno here, or use alloca or something. */
2385 coff_slurp_symbol_table (abfd
)
2388 combined_entry_type
*native_symbols
;
2389 coff_symbol_type
*cached_area
;
2390 unsigned int *table_ptr
;
2392 unsigned int number_of_symbols
= 0;
2394 if (obj_symbols (abfd
))
2396 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0)
2399 /* Read in the symbol table */
2400 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
2405 /* Allocate enough room for all the symbols in cached form */
2406 cached_area
= ((coff_symbol_type
*)
2408 (obj_raw_syment_count (abfd
)
2409 * sizeof (coff_symbol_type
))));
2411 if (cached_area
== NULL
)
2413 bfd_set_error (bfd_error_no_memory
);
2416 table_ptr
= ((unsigned int *)
2418 (obj_raw_syment_count (abfd
)
2419 * sizeof (unsigned int))));
2421 if (table_ptr
== NULL
)
2423 bfd_set_error (bfd_error_no_memory
);
2428 coff_symbol_type
*dst
= cached_area
;
2429 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
2430 unsigned int this_index
= 0;
2431 while (this_index
< last_native_index
)
2433 combined_entry_type
*src
= native_symbols
+ this_index
;
2434 table_ptr
[this_index
] = number_of_symbols
;
2435 dst
->symbol
.the_bfd
= abfd
;
2437 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
2438 /* We use the native name field to point to the cached field. */
2439 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
2440 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
2441 src
->u
.syment
.n_scnum
);
2442 dst
->symbol
.flags
= 0;
2443 dst
->done_lineno
= false;
2445 switch (src
->u
.syment
.n_sclass
)
2450 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2451 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2452 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2454 /* Fall through to next case */
2463 /* PE uses storage class 0x68 to denote a section symbol */
2466 if ((src
->u
.syment
.n_scnum
) == 0)
2468 if ((src
->u
.syment
.n_value
) == 0)
2470 dst
->symbol
.section
= bfd_und_section_ptr
;
2471 dst
->symbol
.value
= 0;
2475 dst
->symbol
.section
= bfd_com_section_ptr
;
2476 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2482 Base the value as an index from the base of the
2486 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2487 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2489 if (ISFCN ((src
->u
.syment
.n_type
)))
2492 A function ext does not go at the end of a file
2494 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2499 /* If this symbol has a csect aux of type LD, the scnlen field
2500 is actually the index of the containing csect symbol. We
2501 need to pointerize it. */
2502 if (src
->u
.syment
.n_numaux
> 0)
2504 combined_entry_type
*aux
;
2506 aux
= src
+ src
->u
.syment
.n_numaux
- 1;
2507 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
2509 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
2510 native_symbols
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
2511 aux
->fix_scnlen
= 1;
2518 case C_STAT
: /* static */
2520 case C_LEAFSTAT
: /* static leaf procedure */
2522 case C_LABEL
: /* label */
2523 if (src
->u
.syment
.n_scnum
== -2)
2524 dst
->symbol
.flags
= BSF_DEBUGGING
;
2526 dst
->symbol
.flags
= BSF_LOCAL
;
2528 Base the value as an index from the base of the section, if
2531 if (dst
->symbol
.section
)
2532 dst
->symbol
.value
= (src
->u
.syment
.n_value
) -
2533 dst
->symbol
.section
->vma
;
2535 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2538 case C_MOS
: /* member of structure */
2539 case C_EOS
: /* end of structure */
2540 #ifdef NOTDEF /* C_AUTOARG has the same value */
2542 case C_GLBLREG
: /* A29k-specific storage class */
2545 case C_REGPARM
: /* register parameter */
2546 case C_REG
: /* register variable */
2548 case C_AUTOARG
: /* 960-specific storage class */
2550 case C_TPDEF
: /* type definition */
2552 case C_AUTO
: /* automatic variable */
2553 case C_FIELD
: /* bit field */
2554 case C_ENTAG
: /* enumeration tag */
2555 case C_MOE
: /* member of enumeration */
2556 case C_MOU
: /* member of union */
2557 case C_UNTAG
: /* union tag */
2558 dst
->symbol
.flags
= BSF_DEBUGGING
;
2559 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2562 case C_FILE
: /* file name */
2563 case C_STRTAG
: /* structure tag */
2565 case C_BINCL
: /* beginning of include file */
2566 case C_EINCL
: /* ending of include file */
2578 dst
->symbol
.flags
= BSF_DEBUGGING
;
2579 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2584 dst
->symbol
.flags
= BSF_DEBUGGING
;
2585 dst
->symbol
.value
= src
->u
.syment
.n_value
;
2587 /* The value is actually a symbol index. Save a pointer to
2588 the symbol instead of the index. FIXME: This should use a
2590 src
->u
.syment
.n_value
=
2591 (long) (native_symbols
+ src
->u
.syment
.n_value
);
2596 case C_BLOCK
: /* ".bb" or ".eb" */
2597 case C_FCN
: /* ".bf" or ".ef" */
2598 case C_EFCN
: /* physical end of function */
2599 dst
->symbol
.flags
= BSF_LOCAL
;
2601 Base the value as an index from the base of the section
2603 dst
->symbol
.value
= (src
->u
.syment
.n_value
) - dst
->symbol
.section
->vma
;
2607 case C_EXTDEF
: /* external definition */
2608 case C_ULABEL
: /* undefined label */
2609 case C_USTATIC
: /* undefined static */
2610 #ifndef COFF_WITH_PE
2611 /* C_LINE in regular coff is 0x68. NT has taken over this storage
2612 class to represent a section symbol */
2613 case C_LINE
: /* line # reformatted as symbol table entry */
2615 case C_ALIAS
: /* duplicate tag */
2616 case C_HIDDEN
: /* ext symbol in dmert public lib */
2619 fprintf (stderr
, "Unrecognized storage class %d (assuming debugging)\n for %s symbol `%s'\n",
2620 src
->u
.syment
.n_sclass
, dst
->symbol
.section
->name
,
2623 dst
->symbol
.flags
= BSF_DEBUGGING
;
2624 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2628 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2632 dst
->symbol
.udata
.i
= 0;
2633 dst
->lineno
= (alent
*) NULL
;
2634 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
2636 number_of_symbols
++;
2637 } /* walk the native symtab */
2638 } /* bfdize the native symtab */
2640 obj_symbols (abfd
) = cached_area
;
2641 obj_raw_syments (abfd
) = native_symbols
;
2643 bfd_get_symcount (abfd
) = number_of_symbols
;
2644 obj_convert (abfd
) = table_ptr
;
2645 /* Slurp the line tables for each section too */
2651 coff_slurp_line_table (abfd
, p
);
2656 } /* coff_slurp_symbol_table() */
2658 /* Check whether a symbol is globally visible. This is used by the
2659 COFF backend linker code in cofflink.c, since a couple of targets
2660 have globally visible symbols which are not class C_EXT. This
2661 function need not handle the case of n_class == C_EXT. */
2663 #undef OTHER_GLOBAL_CLASS
2666 #define OTHER_GLOBAL_CLASS C_LEAFEXT
2670 #define OTHER_GLOBAL_CLASS C_HIDEXT
2674 #define OTHER_GLOBAL_CLASS C_SECTION
2677 #ifdef OTHER_GLOBAL_CLASS
2680 coff_sym_is_global (abfd
, syment
)
2682 struct internal_syment
*syment
;
2684 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
2689 #undef OTHER_GLOBAL_CLASS
2691 #else /* ! defined (OTHER_GLOBAL_CLASS) */
2693 /* sym_is_global should not be defined if it has nothing to do. */
2695 #define coff_sym_is_global 0
2697 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
2703 Coff relocations are easily transformed into the internal BFD form
2706 Reading a coff relocation table is done in the following stages:
2708 o Read the entire coff relocation table into memory.
2710 o Process each relocation in turn; first swap it from the
2711 external to the internal form.
2713 o Turn the symbol referenced in the relocation's symbol index
2714 into a pointer into the canonical symbol table.
2715 This table is the same as the one returned by a call to
2716 @code{bfd_canonicalize_symtab}. The back end will call that
2717 routine and save the result if a canonicalization hasn't been done.
2719 o The reloc index is turned into a pointer to a howto
2720 structure, in a back end specific way. For instance, the 386
2721 and 960 use the @code{r_type} to directly produce an index
2722 into a howto table vector; the 88k subtracts a number from the
2723 @code{r_type} field and creates an addend field.
2729 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2731 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2732 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2733 coffsym = (obj_symbols (abfd) \
2734 + (cache_ptr->sym_ptr_ptr - symbols)); \
2736 coffsym = coff_symbol_from (abfd, ptr); \
2737 if (coffsym != (coff_symbol_type *) NULL \
2738 && coffsym->native->u.syment.n_scnum == 0) \
2739 cache_ptr->addend = 0; \
2740 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2741 && ptr->section != (asection *) NULL) \
2742 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2744 cache_ptr->addend = 0; \
2749 coff_slurp_reloc_table (abfd
, asect
, symbols
)
2754 RELOC
*native_relocs
;
2755 arelent
*reloc_cache
;
2760 if (asect
->relocation
)
2762 if (asect
->reloc_count
== 0)
2764 if (asect
->flags
& SEC_CONSTRUCTOR
)
2766 if (!coff_slurp_symbol_table (abfd
))
2769 (RELOC
*) buy_and_read (abfd
,
2773 asect
->reloc_count
));
2774 reloc_cache
= (arelent
*)
2775 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
2777 if (reloc_cache
== NULL
)
2779 bfd_set_error (bfd_error_no_memory
);
2784 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2786 #ifdef RELOC_PROCESSING
2787 struct internal_reloc dst
;
2788 struct external_reloc
*src
;
2790 cache_ptr
= reloc_cache
+ idx
;
2791 src
= native_relocs
+ idx
;
2792 coff_swap_reloc_in (abfd
, src
, &dst
);
2794 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
2796 struct internal_reloc dst
;
2798 struct external_reloc
*src
;
2800 cache_ptr
= reloc_cache
+ idx
;
2801 src
= native_relocs
+ idx
;
2803 coff_swap_reloc_in (abfd
, src
, &dst
);
2806 cache_ptr
->address
= dst
.r_vaddr
;
2808 if (dst
.r_symndx
!= -1)
2810 /* @@ Should never be greater than count of symbols! */
2811 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
2813 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[dst
.r_symndx
];
2814 ptr
= *(cache_ptr
->sym_ptr_ptr
);
2818 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
2822 /* The symbols definitions that we have read in have been
2823 relocated as if their sections started at 0. But the offsets
2824 refering to the symbols in the raw data have not been
2825 modified, so we have to have a negative addend to compensate.
2827 Note that symbols which used to be common must be left alone */
2829 /* Calculate any reloc addend by looking at the symbol */
2830 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
2832 cache_ptr
->address
-= asect
->vma
;
2833 /* !! cache_ptr->section = (asection *) NULL;*/
2835 /* Fill in the cache_ptr->howto field from dst.r_type */
2836 RTYPE2HOWTO (cache_ptr
, &dst
);
2841 asect
->relocation
= reloc_cache
;
2845 #ifndef coff_rtype_to_howto
2848 /* Get the howto structure for a reloc. This is only used if the file
2849 including this one defines coff_relocate_section to be
2850 _bfd_coff_generic_relocate_section, so it is OK if it does not
2851 always work. It is the responsibility of the including file to
2852 make sure it is reasonable if it is needed. */
2854 static reloc_howto_type
*coff_rtype_to_howto
2855 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
2856 struct coff_link_hash_entry
*, struct internal_syment
*,
2860 static reloc_howto_type
*
2861 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
2864 struct internal_reloc
*rel
;
2865 struct coff_link_hash_entry
*h
;
2866 struct internal_syment
*sym
;
2871 RTYPE2HOWTO (&genrel
, rel
);
2872 return genrel
.howto
;
2875 #else /* ! defined (RTYPE2HOWTO) */
2877 #define coff_rtype_to_howto NULL
2879 #endif /* ! defined (RTYPE2HOWTO) */
2880 #endif /* ! defined (coff_rtype_to_howto) */
2882 /* This is stupid. This function should be a boolean predicate. */
2884 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
2890 arelent
*tblptr
= section
->relocation
;
2891 unsigned int count
= 0;
2894 if (section
->flags
& SEC_CONSTRUCTOR
)
2896 /* this section has relocs made up by us, they are not in the
2897 file, so take them out of their chain and place them into
2898 the data area provided */
2899 arelent_chain
*chain
= section
->constructor_chain
;
2900 for (count
= 0; count
< section
->reloc_count
; count
++)
2902 *relptr
++ = &chain
->relent
;
2903 chain
= chain
->next
;
2909 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
2912 tblptr
= section
->relocation
;
2914 for (; count
++ < section
->reloc_count
;)
2915 *relptr
++ = tblptr
++;
2920 return section
->reloc_count
;
2925 coff_sym_filepos (abfd
)
2928 return obj_sym_filepos (abfd
);
2932 #ifndef coff_reloc16_estimate
2933 #define coff_reloc16_estimate dummy_reloc16_estimate
2936 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
2938 asection
*input_section
;
2940 unsigned int shrink
;
2941 struct bfd_link_info
*link_info
;
2948 #ifndef coff_reloc16_extra_cases
2949 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
2950 /* This works even if abort is not declared in any header file. */
2952 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
2955 struct bfd_link_info
*link_info
;
2956 struct bfd_link_order
*link_order
;
2959 unsigned int *src_ptr
;
2960 unsigned int *dst_ptr
;
2962 fprintf (stderr
, "%s\n", reloc
->howto
->name
);
2967 /* If coff_relocate_section is defined, we can use the optimized COFF
2968 backend linker. Otherwise we must continue to use the old linker. */
2969 #ifdef coff_relocate_section
2970 #ifndef coff_bfd_link_hash_table_create
2971 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
2973 #ifndef coff_bfd_link_add_symbols
2974 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
2976 #ifndef coff_bfd_final_link
2977 #define coff_bfd_final_link _bfd_coff_final_link
2979 #else /* ! defined (coff_relocate_section) */
2980 #define coff_relocate_section NULL
2981 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
2982 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
2983 #define coff_bfd_final_link _bfd_generic_final_link
2984 #endif /* ! defined (coff_relocate_section) */
2985 #define coff_bfd_link_split_section _bfd_generic_link_split_section
2987 #ifndef coff_adjust_symndx
2988 #define coff_adjust_symndx NULL
2991 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
2993 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
2994 coff_swap_aux_out
, coff_swap_sym_out
,
2995 coff_swap_lineno_out
, coff_swap_reloc_out
,
2996 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
2997 coff_swap_scnhdr_out
,
2998 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
2999 #ifdef COFF_LONG_FILENAMES
3004 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
3005 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
3006 coff_mkobject_hook
, styp_to_sec_flags
, coff_make_section_hook
,
3007 coff_set_alignment_hook
, coff_slurp_symbol_table
, symname_in_debug_hook
,
3008 coff_reloc16_extra_cases
, coff_reloc16_estimate
,
3009 coff_sym_is_global
, coff_compute_section_file_positions
,
3010 coff_relocate_section
, coff_rtype_to_howto
, coff_adjust_symndx
3013 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3014 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3015 #define coff_get_section_contents _bfd_generic_get_section_contents
3017 #define coff_bfd_copy_private_symbol_data \
3018 _bfd_generic_bfd_copy_private_symbol_data
3019 #define coff_bfd_copy_private_section_data \
3020 _bfd_generic_bfd_copy_private_section_data
3021 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3022 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3023 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3025 #ifndef coff_bfd_is_local_label
3026 #define coff_bfd_is_local_label bfd_generic_is_local_label
3029 /* The reloc lookup routine must be supplied by each individual COFF
3031 #ifndef coff_bfd_reloc_type_lookup
3032 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3035 #define coff_bfd_get_relocated_section_contents \
3036 bfd_generic_get_relocated_section_contents
3037 #define coff_bfd_relax_section bfd_generic_relax_section