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;
307 pe_value(bfd_link_pe_info_dval
*ptr
, bfd_vma def
)
309 if (ptr
&& ptr
->defined
)
315 #include "coffswap.h"
317 /* void warning(); */
320 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
321 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
322 * NOTE: If you add to/change this routine, you should mirror the changes
323 * in styp_to_sec_flags().
326 sec_to_styp_flags (sec_name
, sec_flags
)
327 CONST
char *sec_name
;
332 if (!strcmp (sec_name
, _TEXT
))
334 styp_flags
= STYP_TEXT
;
336 else if (!strcmp (sec_name
, _DATA
))
338 styp_flags
= STYP_DATA
;
341 else if (!strcmp (sec_name
, ".data2"))
343 styp_flags
= STYP_DATA
;
344 #endif /* TWO_DATA_SECS */
346 else if (!strcmp (sec_name
, _BSS
))
348 styp_flags
= STYP_BSS
;
351 else if (!strcmp (sec_name
, _COMMENT
))
353 styp_flags
= STYP_INFO
;
354 #endif /* _COMMENT */
357 else if (!strcmp (sec_name
, _LIB
))
359 styp_flags
= STYP_LIB
;
363 else if (!strcmp (sec_name
, _LIT
))
365 styp_flags
= STYP_LIT
;
368 else if (!strcmp (sec_name
, ".debug"))
371 styp_flags
= STYP_DEBUG
;
373 styp_flags
= STYP_INFO
;
376 else if (!strncmp (sec_name
, ".stab", 5))
378 styp_flags
= STYP_INFO
;
380 /* Try and figure out what it should be */
381 else if (sec_flags
& SEC_CODE
)
383 styp_flags
= STYP_TEXT
;
385 else if (sec_flags
& SEC_DATA
)
387 styp_flags
= STYP_DATA
;
389 else if (sec_flags
& SEC_READONLY
)
391 #ifdef STYP_LIT /* 29k readonly text/data section */
392 styp_flags
= STYP_LIT
;
394 styp_flags
= STYP_TEXT
;
395 #endif /* STYP_LIT */
397 else if (sec_flags
& SEC_LOAD
)
399 styp_flags
= STYP_TEXT
;
401 else if (sec_flags
& SEC_ALLOC
)
403 styp_flags
= STYP_BSS
;
407 if ((sec_flags
& (SEC_NEVER_LOAD
| SEC_COFF_SHARED_LIBRARY
)) != 0)
408 styp_flags
|= STYP_NOLOAD
;
414 * Return a word with SEC_* flags set to represent the incoming
415 * STYP_* flags (from scnhdr.s_flags). The inverse of this
416 * function is sec_to_styp_flags().
417 * NOTE: If you add to/change this routine, you should mirror the changes
418 * in sec_to_styp_flags().
421 styp_to_sec_flags (abfd
, hdr
, name
)
426 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
427 long styp_flags
= internal_s
->s_flags
;
428 flagword sec_flags
= 0;
431 if (styp_flags
& STYP_NOLOAD
)
433 sec_flags
|= SEC_NEVER_LOAD
;
435 #endif /* STYP_NOLOAD */
437 /* For 386 COFF, at least, an unloadable text or data section is
438 actually a shared library section. */
439 if (styp_flags
& STYP_TEXT
)
441 if (sec_flags
& SEC_NEVER_LOAD
)
442 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
444 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
446 else if (styp_flags
& STYP_DATA
)
448 if (sec_flags
& SEC_NEVER_LOAD
)
449 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
451 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
453 else if (styp_flags
& STYP_BSS
)
455 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
456 if (sec_flags
& SEC_NEVER_LOAD
)
457 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
460 sec_flags
|= SEC_ALLOC
;
462 else if (styp_flags
& STYP_INFO
)
464 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
465 defined. coff_compute_section_file_positions uses
466 COFF_PAGE_SIZE to ensure that the low order bits of the
467 section VMA and the file offset match. If we don't know
468 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
469 and demand page loading of the file will fail. */
470 #ifdef COFF_PAGE_SIZE
471 sec_flags
|= SEC_DEBUGGING
;
474 else if (strcmp (name
, _TEXT
) == 0)
476 if (sec_flags
& SEC_NEVER_LOAD
)
477 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
479 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
481 else if (strcmp (name
, _DATA
) == 0
483 || strcmp (name
, ".data2") == 0
487 if (sec_flags
& SEC_NEVER_LOAD
)
488 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
490 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
492 else if (strcmp (name
, _BSS
) == 0)
494 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
495 if (sec_flags
& SEC_NEVER_LOAD
)
496 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
499 sec_flags
|= SEC_ALLOC
;
501 else if (strcmp (name
, ".debug") == 0
503 || strcmp (name
, _COMMENT
) == 0
505 || strncmp (name
, ".stab", 5) == 0)
507 #ifdef COFF_PAGE_SIZE
508 sec_flags
|= SEC_DEBUGGING
;
512 else if (strcmp (name
, _LIB
) == 0)
516 else if (strcmp (name
, _LIT
) == 0)
518 sec_flags
= SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
;
523 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
526 #ifdef STYP_LIT /* A29k readonly text/data section type */
527 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
529 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
531 #endif /* STYP_LIT */
532 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
533 if (styp_flags
& STYP_OTHER_LOAD
)
535 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
537 #endif /* STYP_SDATA */
542 #define get_index(symbol) ((symbol)->udata.i)
546 bfd_coff_backend_data
550 Special entry points for gdb to swap in coff symbol table parts:
553 . void (*_bfd_coff_swap_aux_in) PARAMS ((
562 . void (*_bfd_coff_swap_sym_in) PARAMS ((
567 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
573 Special entry points for gas to swap out coff parts:
575 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
584 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
589 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
594 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
599 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
604 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
609 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
615 Special entry points for generic COFF routines to call target
616 dependent COFF routines:
618 . unsigned int _bfd_filhsz;
619 . unsigned int _bfd_aoutsz;
620 . unsigned int _bfd_scnhsz;
621 . unsigned int _bfd_symesz;
622 . unsigned int _bfd_auxesz;
623 . unsigned int _bfd_relsz;
624 . unsigned int _bfd_linesz;
625 . boolean _bfd_coff_long_filenames;
626 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
630 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
634 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
638 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
642 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
644 . PTR internal_filehdr));
645 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
647 . PTR internal_filehdr));
648 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
650 . PTR internal_filehdr,
651 . PTR internal_aouthdr));
652 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
654 . PTR internal_scnhdr,
655 . const char *name));
656 . asection *(*_bfd_make_section_hook) PARAMS ((
659 . void (*_bfd_set_alignment_hook) PARAMS ((
662 . PTR internal_scnhdr));
663 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
665 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
667 . struct internal_syment *sym));
668 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
670 . struct bfd_link_info *link_info,
671 . struct bfd_link_order *link_order,
674 . unsigned int *src_ptr,
675 . unsigned int *dst_ptr));
676 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
678 . asection *input_section,
680 . unsigned int shrink,
681 . struct bfd_link_info *link_info));
682 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
684 . struct internal_syment *));
685 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
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_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
805 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
806 . (obfd, info, ibfd, o, con, rel, isyms, secs))
807 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
808 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
809 . (abfd, sec, rel, h, sym, addendp))
810 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
811 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
812 . (obfd, info, ibfd, sec, rel, adjustedp))
816 /* See whether the magic number matches. */
819 coff_bad_format_hook (abfd
, filehdr
)
823 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
825 if (BADMAG (*internal_f
))
828 /* if the optional header is NULL or not the correct size then
829 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
830 and Intel 960 readwrite headers (I960WRMAGIC) is that the
831 optional header is of a different size.
833 But the mips keeps extra stuff in it's opthdr, so dont check
837 #if defined(M88) || defined(I960)
838 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
846 coff_make_section_hook (abfd
, name
)
851 /* FIXME: This predates the call to bfd_make_section_anyway
852 in make_a_section_from_file, and can probably go away. */
853 /* On SCO a file created by the Microsoft assembler can have two
854 .data sections. We use .data2 for the second one. */
855 if (strcmp (name
, _DATA
) == 0)
856 return bfd_make_section (abfd
, ".data2");
858 return (asection
*) NULL
;
862 initialize a section structure with information peculiar to this
863 particular implementation of coff
867 coff_new_section_hook (abfd
, section
)
871 section
->alignment_power
= COFF_DEFAULT_SECTION_ALIGNMENT_POWER
;
873 /* Allocate aux records for section symbols, to store size and
876 @@ Shouldn't use constant multiplier here! */
877 coffsymbol (section
->symbol
)->native
=
878 (combined_entry_type
*) bfd_zalloc (abfd
,
879 sizeof (combined_entry_type
) * 10);
881 /* The .stab section must be aligned to 2**2 at most, because
882 otherwise there may be gaps in the section which gdb will not
883 know how to interpret. Examining the section name is a hack, but
884 that is also how gdb locates the section. We also align the
885 .stabstr section this way for backward compatibility, although I
886 believe it would work anyhow. */
887 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 2
888 && (strncmp (section
->name
, ".stab", 5) == 0))
889 section
->alignment_power
= 2;
896 /* Set the alignment of a BFD section. */
899 coff_set_alignment_hook (abfd
, section
, scnhdr
)
904 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
907 for (i
= 0; i
< 32; i
++)
908 if ((1 << i
) >= hdr
->s_align
)
910 section
->alignment_power
= i
;
915 #define coff_set_alignment_hook \
916 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
924 coff_data_type
*coff
;
926 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*) bfd_zalloc (abfd
, sizeof (coff_data_type
));
927 if (abfd
->tdata
.coff_obj_data
== 0)
929 bfd_set_error (bfd_error_no_memory
);
932 coff
= coff_data (abfd
);
933 coff
->symbols
= (coff_symbol_type
*) NULL
;
934 coff
->conversion_table
= (unsigned int *) NULL
;
935 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
937 /* make_abs_section(abfd);*/
945 /* Create the COFF backend specific information. */
948 coff_mkobject_hook (abfd
, filehdr
, aouthdr
)
953 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
954 coff_data_type
*coff
;
956 if (coff_mkobject (abfd
) == false)
959 coff
= coff_data (abfd
);
961 coff
->sym_filepos
= internal_f
->f_symptr
;
963 /* These members communicate important constants about the symbol
964 table to GDB's symbol-reading code. These `constants'
965 unfortunately vary among coff implementations... */
966 coff
->local_n_btmask
= N_BTMASK
;
967 coff
->local_n_btshft
= N_BTSHFT
;
968 coff
->local_n_tmask
= N_TMASK
;
969 coff
->local_n_tshift
= N_TSHIFT
;
970 coff
->local_symesz
= SYMESZ
;
971 coff
->local_auxesz
= AUXESZ
;
972 coff
->local_linesz
= LINESZ
;
974 obj_raw_syment_count (abfd
) =
975 obj_conv_table_size (abfd
) =
981 /* Determine the machine architecture and type. FIXME: This is target
982 dependent because the magic numbers are defined in the target
983 dependent header files. But there is no particular need for this.
984 If the magic numbers were moved to a separate file, this function
985 would be target independent and would also be much more successful
986 at linking together COFF files for different architectures. */
989 coff_set_arch_mach_hook (abfd
, filehdr
)
994 enum bfd_architecture arch
;
995 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
998 switch (internal_f
->f_magic
)
1003 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
1004 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
1005 arch
= bfd_arch_i386
;
1009 #ifdef A29K_MAGIC_BIG
1010 case A29K_MAGIC_BIG
:
1011 case A29K_MAGIC_LITTLE
:
1012 arch
= bfd_arch_a29k
;
1018 arch
= bfd_arch_arm
;
1025 #ifdef MC68KBCSMAGIC
1028 #ifdef APOLLOM68KMAGIC
1029 case APOLLOM68KMAGIC
:
1031 #ifdef LYNXCOFFMAGIC
1034 arch
= bfd_arch_m68k
;
1042 arch
= bfd_arch_m88k
;
1048 arch
= bfd_arch_z8k
;
1049 switch (internal_f
->f_flags
& F_MACHMASK
)
1052 machine
= bfd_mach_z8001
;
1055 machine
= bfd_mach_z8002
;
1066 arch
= bfd_arch_i960
;
1067 switch (F_I960TYPE
& internal_f
->f_flags
)
1071 machine
= bfd_mach_i960_core
;
1074 machine
= bfd_mach_i960_kb_sb
;
1077 machine
= bfd_mach_i960_mc
;
1080 machine
= bfd_mach_i960_xa
;
1083 machine
= bfd_mach_i960_ca
;
1086 machine
= bfd_mach_i960_ka_sa
;
1088 /* start-sanitize-i960xl */
1090 machine
= bfd_mach_i960_xl
;
1092 /* end-sanitize-i960xl */
1102 arch
= bfd_arch_rs6000
;
1109 arch
= bfd_arch_we32k
;
1116 arch
= bfd_arch_h8300
;
1117 machine
= bfd_mach_h8300
;
1118 /* !! FIXME this probably isn't the right place for this */
1119 abfd
->flags
|= BFD_IS_RELAXABLE
;
1125 arch
= bfd_arch_h8300
;
1126 machine
= bfd_mach_h8300h
;
1127 /* !! FIXME this probably isn't the right place for this */
1128 abfd
->flags
|= BFD_IS_RELAXABLE
;
1132 #ifdef SH_ARCH_MAGIC_BIG
1133 case SH_ARCH_MAGIC_BIG
:
1134 case SH_ARCH_MAGIC_LITTLE
:
1142 arch
= bfd_arch_h8500
;
1149 #ifdef LYNXCOFFMAGIC
1152 arch
= bfd_arch_sparc
;
1157 default: /* Unreadable input file type */
1158 arch
= bfd_arch_obscure
;
1162 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1166 #ifdef SYMNAME_IN_DEBUG
1169 symname_in_debug_hook (abfd
, sym
)
1171 struct internal_syment
*sym
;
1173 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1178 #define symname_in_debug_hook \
1179 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1187 To write relocations, the back end steps though the
1188 canonical relocation table and create an
1189 @code{internal_reloc}. The symbol index to use is removed from
1190 the @code{offset} field in the symbol table supplied. The
1191 address comes directly from the sum of the section base
1192 address and the relocation offset; the type is dug directly
1193 from the howto field. Then the @code{internal_reloc} is
1194 swapped into the shape of an @code{external_reloc} and written
1200 coff_write_relocs (abfd
, first_undef
)
1205 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1208 struct external_reloc dst
;
1210 arelent
**p
= s
->orelocation
;
1211 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1213 for (i
= 0; i
< s
->reloc_count
; i
++)
1215 struct internal_reloc n
;
1217 memset ((PTR
) & n
, 0, sizeof (n
));
1219 /* Now we've renumbered the symbols we know where the
1220 undefined symbols live in the table. Check the reloc
1221 entries for symbols who's output bfd isn't the right one.
1222 This is because the symbol was undefined (which means
1223 that all the pointers are never made to point to the same
1224 place). This is a bad thing,'cause the symbols attached
1225 to the output bfd are indexed, so that the relocation
1226 entries know which symbol index they point to. So we
1227 have to look up the output symbol here. */
1229 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1232 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1233 asymbol
**outsyms
= abfd
->outsymbols
;
1234 for (i
= first_undef
; outsyms
[i
]; i
++)
1236 const char *intable
= outsyms
[i
]->name
;
1237 if (strcmp (intable
, sname
) == 0) {
1238 /* got a hit, so repoint the reloc */
1239 q
->sym_ptr_ptr
= outsyms
+ i
;
1245 n
.r_vaddr
= q
->address
+ s
->vma
;
1248 /* The 29k const/consth reloc pair is a real kludge. The consth
1249 part doesn't have a symbol; it has an offset. So rebuilt
1251 if (q
->howto
->type
== R_IHCONST
)
1252 n
.r_symndx
= q
->addend
;
1257 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1258 /* This is a relocation relative to the absolute symbol. */
1262 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1263 /* Take notice if the symbol reloc points to a symbol
1264 we don't have in our symbol table. What should we
1266 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1271 #ifdef SWAP_OUT_RELOC_OFFSET
1272 n
.r_offset
= q
->addend
;
1276 /* Work out reloc type from what is required */
1277 SELECT_RELOC (n
, q
->howto
);
1279 n
.r_type
= q
->howto
->type
;
1281 coff_swap_reloc_out (abfd
, &n
, &dst
);
1282 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1290 /* Set flags and magic number of a coff file from architecture and machine
1291 type. Result is true if we can represent the arch&type, false if not. */
1294 coff_set_flags (abfd
, magicp
, flagsp
)
1297 unsigned short *flagsp
;
1299 switch (bfd_get_arch (abfd
))
1304 switch (bfd_get_mach (abfd
))
1306 case bfd_mach_z8001
:
1309 case bfd_mach_z8002
:
1323 *magicp
= I960ROMAGIC
;
1325 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1326 I960RWMAGIC); FIXME???
1328 switch (bfd_get_mach (abfd
))
1330 case bfd_mach_i960_core
:
1333 case bfd_mach_i960_kb_sb
:
1336 case bfd_mach_i960_mc
:
1339 case bfd_mach_i960_xa
:
1342 case bfd_mach_i960_ca
:
1345 case bfd_mach_i960_ka_sa
:
1348 /* start-sanitize-i960xl */
1349 case bfd_mach_i960_xl
:
1352 /* end-sanitize-i960xl */
1368 *magicp
= I386MAGIC
;
1370 /* Just overwrite the usual value if we're doing Lynx. */
1371 *magicp
= LYNXCOFFMAGIC
;
1378 #ifdef APOLLOM68KMAGIC
1379 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1381 *magicp
= MC68MAGIC
;
1384 /* Just overwrite the usual value if we're doing Lynx. */
1385 *magicp
= LYNXCOFFMAGIC
;
1393 *magicp
= MC88OMAGIC
;
1398 case bfd_arch_h8300
:
1399 switch (bfd_get_mach (abfd
))
1401 case bfd_mach_h8300
:
1402 *magicp
= H8300MAGIC
;
1404 case bfd_mach_h8300h
:
1405 *magicp
= H8300HMAGIC
;
1411 #ifdef SH_ARCH_MAGIC_BIG
1413 if (abfd
->xvec
->byteorder_big_p
)
1414 *magicp
= SH_ARCH_MAGIC_BIG
;
1416 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1422 case bfd_arch_sparc
:
1423 *magicp
= SPARCMAGIC
;
1425 /* Just overwrite the usual value if we're doing Lynx. */
1426 *magicp
= LYNXCOFFMAGIC
;
1433 case bfd_arch_h8500
:
1434 *magicp
= H8500MAGIC
;
1438 #ifdef A29K_MAGIC_BIG
1440 if (abfd
->xvec
->byteorder_big_p
)
1441 *magicp
= A29K_MAGIC_BIG
;
1443 *magicp
= A29K_MAGIC_LITTLE
;
1449 case bfd_arch_we32k
:
1450 *magicp
= WE32KMAGIC
;
1456 case bfd_arch_rs6000
:
1457 case bfd_arch_powerpc
:
1458 *magicp
= U802TOCMAGIC
;
1463 default: /* Unknown architecture */
1464 /* return false; -- fall through to "return false" below, to avoid
1465 "statement never reached" errors on the one below. */
1474 coff_set_arch_mach (abfd
, arch
, machine
)
1476 enum bfd_architecture arch
;
1477 unsigned long machine
;
1480 unsigned short dummy2
;
1482 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
1485 if (arch
!= bfd_arch_unknown
&&
1486 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
1487 return false; /* We can't represent this type */
1489 return true; /* We're easy ... */
1493 /* Calculate the file position for each section. */
1496 coff_compute_section_file_positions (abfd
)
1500 asection
*previous
= (asection
*) NULL
;
1501 file_ptr sofar
= FILHSZ
;
1507 if (bfd_get_start_address (abfd
))
1509 /* A start address may have been added to the original file. In this
1510 case it will need an optional header to record it. */
1511 abfd
->flags
|= EXEC_P
;
1514 if (abfd
->flags
& EXEC_P
)
1517 sofar
+= abfd
->section_count
* SCNHSZ
;
1518 for (current
= abfd
->sections
, count
= 1;
1519 current
!= (asection
*) NULL
;
1520 current
= current
->next
, ++count
)
1522 current
->target_index
= count
;
1524 /* Only deal with sections which have contents */
1525 if (!(current
->flags
& SEC_HAS_CONTENTS
))
1529 /* Do not include the .junk section. This is where we collect section
1530 data which we don't need. This is mainly the MS .debug$ data which
1531 stores codeview debug data. */
1532 if (strcmp (current
->name
, ".junk") == 0)
1538 /* Align the sections in the file to the same boundary on
1539 which they are aligned in virtual memory. I960 doesn't
1540 do this (FIXME) so we can stay in sync with Intel. 960
1541 doesn't yet page from files... */
1544 /* make sure this section is aligned on the right boundary - by
1545 padding the previous section up if necessary */
1548 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1549 if (previous
!= (asection
*) NULL
)
1551 previous
->_raw_size
+= sofar
- old_sofar
;
1557 #ifdef COFF_PAGE_SIZE
1558 /* In demand paged files the low order bits of the file offset
1559 must match the low order bits of the virtual address. */
1560 if ((abfd
->flags
& D_PAGED
) != 0
1561 && (current
->flags
& SEC_ALLOC
) != 0)
1562 sofar
+= (current
->vma
- sofar
) % COFF_PAGE_SIZE
;
1565 current
->filepos
= sofar
;
1567 sofar
+= current
->_raw_size
;
1569 /* make sure that this section is of the right size too */
1571 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1572 current
->_raw_size
+= sofar
- old_sofar
;
1576 /* Force .lib sections to start at zero. The vma is then
1577 incremented in coff_set_section_contents. This is right for
1579 if (strcmp (current
->name
, _LIB
) == 0)
1580 bfd_set_section_vma (abfd
, current
, 0);
1586 /* Normally, the starting location for the symbol table will be at the end
1587 of the last section. However, when dealing with NT, the last section
1588 must be as long as its size rounded up to the next page (0x1000). */
1589 sofar
= ((sofar
+ NT_FILE_ALIGNMENT
- 1) /
1590 NT_FILE_ALIGNMENT
) * NT_FILE_ALIGNMENT
;
1593 obj_relocbase (abfd
) = sofar
;
1594 abfd
->output_has_begun
= true;
1598 #ifndef RS6000COFF_C
1600 /* If .file, .text, .data, .bss symbols are missing, add them. */
1601 /* @@ Should we only be adding missing symbols, or overriding the aux
1602 values for existing section symbols? */
1604 coff_add_missing_symbols (abfd
)
1607 unsigned int nsyms
= bfd_get_symcount (abfd
);
1608 asymbol
**sympp
= abfd
->outsymbols
;
1611 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
1613 for (i
= 0; i
< nsyms
; i
++)
1615 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
1619 /* only do this if there is a coff representation of the input
1621 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
1626 name
= csym
->symbol
.name
;
1629 if (!strcmp (name
, _TEXT
))
1632 else if (!strcmp (name
, ".wtext"))
1635 else if (!strcmp (name
, _DATA
))
1637 else if (!strcmp (name
, _BSS
))
1641 /* Now i == bfd_get_symcount (abfd). */
1642 /* @@ For now, don't deal with .file symbol. */
1645 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
1647 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
1648 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
1651 bfd_set_error (bfd_error_no_memory
);
1654 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
1657 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1661 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
1663 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
1665 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
1666 BFD_ASSERT (i
== nsyms
);
1667 bfd_set_symtab (abfd
, sympp2
, nsyms
);
1671 #endif /* ! defined (RS6000COFF_C) */
1674 static void add_data_entry (abfd
, aout
, idx
, name
, base
)
1676 struct internal_aouthdr
*aout
;
1681 asection
*sec
= bfd_get_section_by_name (abfd
, name
);
1683 /* add import directory information if it exists */
1686 aout
->pe
->DataDirectory
[idx
].VirtualAddress
= sec
->lma
- base
;
1687 aout
->pe
->DataDirectory
[idx
].Size
= sec
->_raw_size
;
1693 fill_pe_header_info (abfd
, internal_f
, internal_a
, end_of_image
)
1695 struct internal_filehdr
*internal_f
;
1696 struct internal_aouthdr
*internal_a
;
1697 bfd_vma end_of_image
;
1699 /* assign other filehdr fields for DOS header and NT signature */
1701 bfd_link_pe_info
*pe_info
= coff_data (abfd
)->link_info
->pe_info
;
1703 internal_f
->f_timdat
= time (0);
1705 if (pe_value (&pe_info
->dll
, 0))
1706 internal_f
->f_flags
|= F_DLL
;
1709 if (bfd_get_section_by_name (abfd
, ".reloc"))
1710 internal_f
->f_flags
&= ~F_RELFLG
;
1713 memset (internal_f
->pe
, 0, sizeof (struct internal_extra_pe_filehdr
));
1714 memset (internal_a
->pe
, 0, sizeof (struct internal_extra_pe_aouthdr
));
1717 internal_a
->pe
->ImageBase
= pe_value (&pe_info
->image_base
, IMAGE_BASE
);
1719 if (internal_a
->tsize
)
1720 internal_a
->text_start
-= internal_a
->pe
->ImageBase
;
1721 if (internal_a
->dsize
)
1722 internal_a
->data_start
-= internal_a
->pe
->ImageBase
;
1723 if (internal_a
->entry
)
1724 internal_a
->entry
-= internal_a
->pe
->ImageBase
;
1727 internal_f
->pe
->e_magic
= DOSMAGIC
;
1728 internal_f
->pe
->e_cblp
= 0x90;
1729 internal_f
->pe
->e_cp
= 0x3;
1730 internal_f
->pe
->e_crlc
= 0x0;
1731 internal_f
->pe
->e_cparhdr
= 0x4;
1732 internal_f
->pe
->e_minalloc
= 0x0;
1733 internal_f
->pe
->e_maxalloc
= 0xffff;
1734 internal_f
->pe
->e_ss
= 0x0;
1735 internal_f
->pe
->e_sp
= 0xb8;
1736 internal_f
->pe
->e_csum
= 0x0;
1737 internal_f
->pe
->e_ip
= 0x0;
1738 internal_f
->pe
->e_cs
= 0x0;
1739 internal_f
->pe
->e_lfarlc
= 0x40;
1740 internal_f
->pe
->e_ovno
= 0x0;
1743 for (idx
=0; idx
< 4; idx
++)
1744 internal_f
->pe
->e_res
[idx
] = 0x0;
1746 internal_f
->pe
->e_oemid
= 0x0;
1747 internal_f
->pe
->e_oeminfo
= 0x0;
1750 for (idx
=0; idx
< 10; idx
++)
1751 internal_f
->pe
->e_res2
[idx
] = 0x0;
1753 internal_f
->pe
->e_lfanew
= 0x80;
1755 /* this next collection of data are mostly just characters. It appears
1756 to be constant within the headers put on NT exes */
1757 internal_f
->pe
->dos_message
[0] = 0x0eba1f0e;
1758 internal_f
->pe
->dos_message
[1] = 0xcd09b400;
1759 internal_f
->pe
->dos_message
[2] = 0x4c01b821;
1760 internal_f
->pe
->dos_message
[3] = 0x685421cd;
1761 internal_f
->pe
->dos_message
[4] = 0x70207369;
1762 internal_f
->pe
->dos_message
[5] = 0x72676f72;
1763 internal_f
->pe
->dos_message
[6] = 0x63206d61;
1764 internal_f
->pe
->dos_message
[7] = 0x6f6e6e61;
1765 internal_f
->pe
->dos_message
[8] = 0x65622074;
1766 internal_f
->pe
->dos_message
[9] = 0x6e757220;
1767 internal_f
->pe
->dos_message
[10] = 0x206e6920;
1768 internal_f
->pe
->dos_message
[11] = 0x20534f44;
1769 internal_f
->pe
->dos_message
[12] = 0x65646f6d;
1770 internal_f
->pe
->dos_message
[13] = 0x0a0d0d2e;
1771 internal_f
->pe
->dos_message
[14] = 0x24;
1772 internal_f
->pe
->dos_message
[15] = 0x0;
1773 internal_f
->pe
->nt_signature
= NT_SIGNATURE
;
1776 /* write all of the other optional header data */
1780 internal_a
->pe
->SectionAlignment
= pe_value (&pe_info
->section_alignment
,
1781 NT_SECTION_ALIGNMENT
);
1783 internal_a
->pe
->FileAlignment
= pe_value (&pe_info
->file_alignment
,
1786 internal_a
->pe
->MajorOperatingSystemVersion
=
1787 pe_value (&pe_info
->major_os_version
, 1);
1789 internal_a
->pe
->MinorOperatingSystemVersion
=
1790 pe_value (&pe_info
->minor_os_version
, 0);
1792 internal_a
->pe
->MajorImageVersion
=
1793 pe_value (&pe_info
->major_image_version
, 1);
1795 internal_a
->pe
->MinorImageVersion
=
1796 pe_value (&pe_info
->minor_image_version
, 0);
1799 internal_a
->pe
->MajorSubsystemVersion
=
1800 pe_value (&pe_info
->major_subsystem_version
, 3);
1803 internal_a
->pe
->MinorSubsystemVersion
=
1804 pe_value (&pe_info
->minor_subsystem_version
, 10);
1808 internal_a
->pe
->Subsystem
=
1809 pe_value (&pe_info
->subsystem
, BFD_PE_CONSOLE
);
1814 /* Virtual start address, take virtual start address of last section,
1815 add its physical size and round up the next page (NT_SECTION_ALIGNMENT).
1816 An assumption has been made that the sections stored in the abfd
1817 structure are in order and that I have successfully saved the last
1818 section's address and size. */
1820 internal_a
->pe
->SizeOfImage
=
1821 (end_of_image
- internal_a
->pe
->ImageBase
1822 + internal_a
->pe
->SectionAlignment
- 1)
1823 & ~ (internal_a
->pe
->SectionAlignment
-1);
1825 /* Start of .text section will do here since it is the first section after
1826 the headers. Note that NT_IMAGE_BASE has already been removed above */
1827 internal_a
->pe
->SizeOfHeaders
= internal_a
->text_start
;
1828 internal_a
->pe
->CheckSum
= 0;
1829 internal_a
->pe
->DllCharacteristics
= 0;
1831 internal_a
->pe
->SizeOfStackReserve
= pe_value (&pe_info
->stack_reserve
,
1833 internal_a
->pe
->SizeOfStackCommit
= pe_value (&pe_info
->stack_commit
,
1836 internal_a
->pe
->SizeOfHeapReserve
= pe_value (&pe_info
->heap_reserve
,
1838 internal_a
->pe
->SizeOfHeapCommit
= pe_value (&pe_info
->heap_commit
,
1841 internal_a
->pe
->LoaderFlags
= 0;
1842 internal_a
->pe
->NumberOfRvaAndSizes
= IMAGE_NUMBEROF_DIRECTORY_ENTRIES
; /* 0x10 */
1844 /* first null out all data directory entries .. */
1845 memset (internal_a
->pe
->DataDirectory
, sizeof (internal_a
->pe
->DataDirectory
), 0);
1847 add_data_entry (abfd
, internal_a
, 0, ".edata", internal_a
->pe
->ImageBase
);
1848 add_data_entry (abfd
, internal_a
, 1, ".idata", internal_a
->pe
->ImageBase
);
1849 add_data_entry (abfd
, internal_a
, 2, ".rsrc" ,internal_a
->pe
->ImageBase
);
1850 add_data_entry (abfd
, internal_a
, 5, ".reloc", internal_a
->pe
->ImageBase
);
1860 coff_write_object_contents (abfd
)
1864 boolean hasrelocs
= false;
1865 boolean haslinno
= false;
1866 file_ptr reloc_base
;
1867 file_ptr lineno_base
;
1869 unsigned long reloc_size
= 0;
1870 unsigned long lnno_size
= 0;
1871 asection
*text_sec
= NULL
;
1872 asection
*data_sec
= NULL
;
1873 asection
*bss_sec
= NULL
;
1874 bfd_vma end_of_image
= 0;
1876 struct internal_filehdr internal_f
;
1877 struct internal_aouthdr internal_a
;
1879 #ifdef COFF_IMAGE_WITH_PE
1880 struct internal_extra_pe_aouthdr extra_a
;
1881 struct internal_extra_pe_filehdr extra_f
;
1883 bfd_link_pe_info
*pe_info
= coff_data (abfd
)->link_info
->pe_info
;
1884 bfd_link_pe_info defs
;
1887 /* Just use sensible defaults */
1888 memset (&defs
, 0, sizeof (defs
));
1889 coff_data (abfd
)->link_info
->pe_info
= &defs
;
1894 bfd_set_error (bfd_error_system_call
);
1896 if (abfd
->output_has_begun
== false)
1897 coff_compute_section_file_positions (abfd
);
1899 reloc_base
= obj_relocbase (abfd
);
1901 /* Make a pass through the symbol table to count line number entries and
1902 put them into the correct asections */
1904 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
1906 /* Work out the size of the reloc and linno areas */
1908 for (current
= abfd
->sections
; current
!= NULL
; current
=
1910 reloc_size
+= current
->reloc_count
* RELSZ
;
1912 lineno_base
= reloc_base
+ reloc_size
;
1913 sym_base
= lineno_base
+ lnno_size
;
1915 /* Indicate in each section->line_filepos its actual file address */
1916 for (current
= abfd
->sections
; current
!= NULL
; current
=
1919 if (current
->lineno_count
)
1921 current
->line_filepos
= lineno_base
;
1922 current
->moving_line_filepos
= lineno_base
;
1923 lineno_base
+= current
->lineno_count
* LINESZ
;
1927 current
->line_filepos
= 0;
1929 if (current
->reloc_count
)
1931 current
->rel_filepos
= reloc_base
;
1932 reloc_base
+= current
->reloc_count
* RELSZ
;
1936 current
->rel_filepos
= 0;
1940 /* Write section headers to the file. */
1941 internal_f
.f_nscns
= 0;
1945 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1946 (EXTRA_NT_HDRSZ
+ FILHSZ
+ AOUTSZ
) :
1947 (EXTRA_NT_HDRSZ
+ FILHSZ
)),
1952 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1953 (FILHSZ
+ AOUTSZ
) : FILHSZ
),
1960 for (current
= abfd
->sections
;
1962 current
= current
->next
)
1964 struct internal_scnhdr section
;
1967 /* Do not include the .junk section. This is where we collect section
1968 data which we don't need. This is mainly the MS .debug$ data which
1969 stores codeview debug data. */
1970 if (strcmp (current
->name
, ".junk") == 0)
1975 internal_f
.f_nscns
++;
1976 strncpy (&(section
.s_name
[0]), current
->name
, 8);
1978 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1979 Ian Taylor <ian@cygnus.com>. */
1980 if (strcmp (current
->name
, _LIB
) == 0)
1981 section
.s_vaddr
= 0;
1984 section
.s_vaddr
= current
->lma
;
1985 section
.s_paddr
= current
->lma
;
1986 section
.s_size
= current
->_raw_size
;
1988 /* Remember the address of the end of the last section */
1990 if (current
->lma
+ current
->_raw_size
> end_of_image
)
1991 end_of_image
= current
->lma
+ current
->_raw_size
;
1994 If this section has no size or is unloadable then the scnptr
1997 if (current
->_raw_size
== 0 ||
1998 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2000 section
.s_scnptr
= 0;
2004 section
.s_scnptr
= current
->filepos
;
2006 section
.s_relptr
= current
->rel_filepos
;
2007 section
.s_lnnoptr
= current
->line_filepos
;
2008 section
.s_nreloc
= current
->reloc_count
;
2009 section
.s_nlnno
= current
->lineno_count
;
2010 if (current
->reloc_count
!= 0)
2012 if (current
->lineno_count
!= 0)
2015 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
2017 if (!strcmp (current
->name
, _TEXT
))
2021 else if (!strcmp (current
->name
, _DATA
))
2024 #ifdef TWO_DATA_SECS
2026 else if (!strcmp (current
->name
, ".data2"))
2029 #endif /* TWO_DATA_SECS */
2031 else if (!strcmp (current
->name
, _BSS
))
2037 section
.s_align
= (current
->alignment_power
2038 ? 1 << current
->alignment_power
2046 /* suppress output of the sections if they are null. ld includes
2047 the bss and data sections even if there is no size assigned
2048 to them. NT loader doesn't like it if these section headers are
2049 included if the sections themselves are not needed */
2050 if (section
.s_size
== 0)
2051 internal_f
.f_nscns
--;
2054 coff_swap_scnhdr_out (abfd
, §ion
, &buff
);
2055 if (bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2059 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
2060 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2069 /* OK, now set up the filehdr... */
2071 /* Don't include the internal abs section in the section count */
2074 We will NOT put a fucking timestamp in the header here. Every time you
2075 put it back, I will come in and take it out again. I'm sorry. This
2076 field does not belong here. We fill it with a 0 so it compares the
2077 same but is not a reasonable time. -- gnu@cygnus.com
2080 internal_f
.f_flags
= 0;
2082 if (abfd
->flags
& EXEC_P
)
2083 internal_f
.f_opthdr
= AOUTSZ
;
2085 internal_f
.f_opthdr
= 0;
2088 internal_f
.f_flags
|= F_RELFLG
;
2090 internal_f
.f_flags
|= F_LNNO
;
2091 if (abfd
->flags
& EXEC_P
)
2092 internal_f
.f_flags
|= F_EXEC
;
2094 if (!abfd
->xvec
->byteorder_big_p
)
2095 internal_f
.f_flags
|= F_AR32WR
;
2097 internal_f
.f_flags
|= F_AR32W
;
2100 FIXME, should do something about the other byte orders and
2104 memset (&internal_a
, 0, sizeof internal_a
);
2106 /* Set up architecture-dependent stuff */
2109 unsigned int magic
= 0;
2110 unsigned short flags
= 0;
2111 coff_set_flags (abfd
, &magic
, &flags
);
2112 internal_f
.f_magic
= magic
;
2113 internal_f
.f_flags
|= flags
;
2114 /* ...and the "opt"hdr... */
2117 #ifdef ULTRA3 /* NYU's machine */
2118 /* FIXME: This is a bogus check. I really want to see if there
2119 * is a .shbss or a .shdata section, if so then set the magic
2120 * number to indicate a shared data executable.
2122 if (internal_f
.f_nscns
>= 7)
2123 internal_a
.magic
= SHMAGIC
; /* Shared magic */
2126 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
2127 #define __A_MAGIC_SET__
2130 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
2131 #define __A_MAGIC_SET__
2134 #define __A_MAGIC_SET__
2135 internal_a
.magic
= PAGEMAGICBCS
;
2139 #define __A_MAGIC_SET__
2140 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2143 #if defined(M68) || defined(WE32K) || defined(M68K)
2144 #define __A_MAGIC_SET__
2146 internal_a
.magic
= LYNXCOFFMAGIC
;
2148 #endif /* M68 || WE32K || M68K */
2151 #define __A_MAGIC_SET__
2152 internal_a
.magic
= ZMAGIC
;
2155 #define __A_MAGIC_SET__
2157 internal_a
.magic
= LYNXCOFFMAGIC
;
2159 internal_a
.magic
= ZMAGIC
;
2164 #define __A_MAGIC_SET__
2166 internal_a
.magic
= LYNXCOFFMAGIC
;
2171 #define __A_MAGIC_SET__
2172 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2173 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2174 RS6K_AOUTHDR_OMAGIC
;
2177 #ifndef __A_MAGIC_SET__
2178 #include "Your aouthdr magic number is not being set!"
2180 #undef __A_MAGIC_SET__
2183 /* Now should write relocs, strings, syms */
2184 obj_sym_filepos (abfd
) = sym_base
;
2186 if (bfd_get_symcount (abfd
) != 0)
2189 #ifndef RS6000COFF_C
2190 if (!coff_add_missing_symbols (abfd
))
2193 if (!coff_renumber_symbols (abfd
, &firstundef
))
2195 coff_mangle_symbols (abfd
);
2196 if (! coff_write_symbols (abfd
))
2198 if (! coff_write_linenumbers (abfd
))
2200 if (! coff_write_relocs (abfd
, firstundef
))
2204 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2205 backend linker, and obj_raw_syment_count is not valid until after
2206 coff_write_symbols is called. */
2207 if (obj_raw_syment_count (abfd
) != 0)
2208 internal_f
.f_symptr
= sym_base
;
2211 internal_f
.f_symptr
= 0;
2212 internal_f
.f_flags
|= F_LSYMS
;
2217 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2218 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2222 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2223 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2227 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2230 internal_a
.entry
= bfd_get_start_address (abfd
);
2231 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2235 #ifdef COFF_IMAGE_WITH_PE
2237 internal_f
.pe
= & extra_f
;
2238 internal_a
.pe
= & extra_a
;
2240 fill_pe_header_info (abfd
, &internal_f
, &internal_a
, end_of_image
);
2243 /* now write them */
2244 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2248 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) & buff
);
2249 if (bfd_write ((PTR
) & buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2252 if (abfd
->flags
& EXEC_P
)
2255 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) & buff
);
2256 if (bfd_write ((PTR
) & buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2264 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2269 bfd_size_type count
;
2271 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
2272 coff_compute_section_file_positions (abfd
);
2275 /* If this is a .lib section, bump the vma address so that it
2276 winds up being the number of .lib sections output. This is
2277 right for SVR3.2. Shared libraries should probably get more
2278 generic support. Ian Taylor <ian@cygnus.com>. */
2279 if (strcmp (section
->name
, _LIB
) == 0)
2283 /* Don't write out bss sections - one way to do this is to
2284 see if the filepos has not been set. */
2285 if (section
->filepos
== 0)
2288 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
2293 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
2299 coff_close_and_cleanup (abfd
)
2302 if (!bfd_read_p (abfd
))
2303 switch (abfd
->format
)
2306 if (!_bfd_write_archive_contents (abfd
))
2310 if (!coff_write_object_contents (abfd
))
2314 bfd_set_error (bfd_error_invalid_operation
);
2318 /* We depend on bfd_close to free all the memory on the obstack. */
2319 /* FIXME if bfd_release is not using obstacks! */
2326 buy_and_read (abfd
, where
, seek_direction
, size
)
2332 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
2335 bfd_set_error (bfd_error_no_memory
);
2338 if (bfd_seek (abfd
, where
, seek_direction
) != 0
2339 || bfd_read (area
, 1, size
, abfd
) != size
)
2342 } /* buy_and_read() */
2348 Creating the linenumber table is done by reading in the entire
2349 coff linenumber table, and creating another table for internal use.
2351 A coff linenumber table is structured so that each function
2352 is marked as having a line number of 0. Each line within the
2353 function is an offset from the first line in the function. The
2354 base of the line number information for the table is stored in
2355 the symbol associated with the function.
2357 The information is copied from the external to the internal
2358 table, and each symbol which marks a function is marked by
2361 How does this work ?
2366 coff_slurp_line_table (abfd
, asect
)
2370 LINENO
*native_lineno
;
2371 alent
*lineno_cache
;
2373 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
2375 native_lineno
= (LINENO
*) buy_and_read (abfd
,
2376 asect
->line_filepos
,
2379 asect
->lineno_count
));
2381 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
2382 if (lineno_cache
== NULL
)
2384 bfd_set_error (bfd_error_no_memory
);
2389 unsigned int counter
= 0;
2390 alent
*cache_ptr
= lineno_cache
;
2391 LINENO
*src
= native_lineno
;
2393 while (counter
< asect
->lineno_count
)
2395 struct internal_lineno dst
;
2396 coff_swap_lineno_in (abfd
, src
, &dst
);
2397 cache_ptr
->line_number
= dst
.l_lnno
;
2399 if (cache_ptr
->line_number
== 0)
2401 coff_symbol_type
*sym
=
2402 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
2403 + obj_raw_syments (abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
2404 cache_ptr
->u
.sym
= (asymbol
*) sym
;
2405 sym
->lineno
= cache_ptr
;
2409 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
2410 - bfd_section_vma (abfd
, asect
);
2411 } /* If no linenumber expect a symbol index */
2417 cache_ptr
->line_number
= 0;
2420 asect
->lineno
= lineno_cache
;
2421 /* FIXME, free native_lineno here, or use alloca or something. */
2426 coff_slurp_symbol_table (abfd
)
2429 combined_entry_type
*native_symbols
;
2430 coff_symbol_type
*cached_area
;
2431 unsigned int *table_ptr
;
2433 unsigned int number_of_symbols
= 0;
2435 if (obj_symbols (abfd
))
2438 /* Read in the symbol table */
2439 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
2444 /* Allocate enough room for all the symbols in cached form */
2445 cached_area
= ((coff_symbol_type
*)
2447 (obj_raw_syment_count (abfd
)
2448 * sizeof (coff_symbol_type
))));
2450 if (cached_area
== NULL
)
2452 bfd_set_error (bfd_error_no_memory
);
2455 table_ptr
= ((unsigned int *)
2457 (obj_raw_syment_count (abfd
)
2458 * sizeof (unsigned int))));
2460 if (table_ptr
== NULL
)
2462 bfd_set_error (bfd_error_no_memory
);
2467 coff_symbol_type
*dst
= cached_area
;
2468 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
2469 unsigned int this_index
= 0;
2470 while (this_index
< last_native_index
)
2472 combined_entry_type
*src
= native_symbols
+ this_index
;
2473 table_ptr
[this_index
] = number_of_symbols
;
2474 dst
->symbol
.the_bfd
= abfd
;
2476 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
2477 /* We use the native name field to point to the cached field. */
2478 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
2479 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
2480 src
->u
.syment
.n_scnum
);
2481 dst
->symbol
.flags
= 0;
2482 dst
->done_lineno
= false;
2484 switch (src
->u
.syment
.n_sclass
)
2489 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2490 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2491 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2493 /* Fall through to next case */
2502 /* PE uses storage class 0x68 to denote a section symbol */
2505 if ((src
->u
.syment
.n_scnum
) == 0)
2507 if ((src
->u
.syment
.n_value
) == 0)
2509 dst
->symbol
.section
= bfd_und_section_ptr
;
2510 dst
->symbol
.value
= 0;
2514 dst
->symbol
.section
= bfd_com_section_ptr
;
2515 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2521 Base the value as an index from the base of the
2525 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2526 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2528 if (ISFCN ((src
->u
.syment
.n_type
)))
2531 A function ext does not go at the end of a file
2533 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2538 /* If this symbol has a csect aux of type LD, the scnlen field
2539 is actually the index of the containing csect symbol. We
2540 need to pointerize it. */
2541 if (src
->u
.syment
.n_numaux
> 0)
2543 combined_entry_type
*aux
;
2545 aux
= src
+ src
->u
.syment
.n_numaux
- 1;
2546 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
2548 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
2549 native_symbols
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
2550 aux
->fix_scnlen
= 1;
2557 case C_STAT
: /* static */
2559 case C_LEAFSTAT
: /* static leaf procedure */
2561 case C_LABEL
: /* label */
2562 if (src
->u
.syment
.n_scnum
== -2)
2563 dst
->symbol
.flags
= BSF_DEBUGGING
;
2565 dst
->symbol
.flags
= BSF_LOCAL
;
2567 Base the value as an index from the base of the section, if
2570 if (dst
->symbol
.section
)
2571 dst
->symbol
.value
= (src
->u
.syment
.n_value
) -
2572 dst
->symbol
.section
->vma
;
2574 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2577 case C_MOS
: /* member of structure */
2578 case C_EOS
: /* end of structure */
2579 #ifdef NOTDEF /* C_AUTOARG has the same value */
2581 case C_GLBLREG
: /* A29k-specific storage class */
2584 case C_REGPARM
: /* register parameter */
2585 case C_REG
: /* register variable */
2587 case C_AUTOARG
: /* 960-specific storage class */
2589 case C_TPDEF
: /* type definition */
2591 case C_AUTO
: /* automatic variable */
2592 case C_FIELD
: /* bit field */
2593 case C_ENTAG
: /* enumeration tag */
2594 case C_MOE
: /* member of enumeration */
2595 case C_MOU
: /* member of union */
2596 case C_UNTAG
: /* union tag */
2597 dst
->symbol
.flags
= BSF_DEBUGGING
;
2598 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2601 case C_FILE
: /* file name */
2602 case C_STRTAG
: /* structure tag */
2604 case C_BINCL
: /* beginning of include file */
2605 case C_EINCL
: /* ending of include file */
2617 dst
->symbol
.flags
= BSF_DEBUGGING
;
2618 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2623 dst
->symbol
.flags
= BSF_DEBUGGING
;
2624 dst
->symbol
.value
= src
->u
.syment
.n_value
;
2626 /* The value is actually a symbol index. Save a pointer to
2627 the symbol instead of the index. FIXME: This should use a
2629 src
->u
.syment
.n_value
=
2630 (long) (native_symbols
+ src
->u
.syment
.n_value
);
2635 case C_BLOCK
: /* ".bb" or ".eb" */
2636 case C_FCN
: /* ".bf" or ".ef" */
2637 case C_EFCN
: /* physical end of function */
2638 dst
->symbol
.flags
= BSF_LOCAL
;
2640 Base the value as an index from the base of the section
2642 dst
->symbol
.value
= (src
->u
.syment
.n_value
) - dst
->symbol
.section
->vma
;
2646 case C_EXTDEF
: /* external definition */
2647 case C_ULABEL
: /* undefined label */
2648 case C_USTATIC
: /* undefined static */
2649 #ifndef COFF_WITH_PE
2650 /* C_LINE in regular coff is 0x68. NT has taken over this storage
2651 class to represent a section symbol */
2652 case C_LINE
: /* line # reformatted as symbol table entry */
2654 case C_ALIAS
: /* duplicate tag */
2655 case C_HIDDEN
: /* ext symbol in dmert public lib */
2658 fprintf (stderr
, "Unrecognized storage class %d (assuming debugging)\n for %s symbol `%s'\n",
2659 src
->u
.syment
.n_sclass
, dst
->symbol
.section
->name
,
2662 dst
->symbol
.flags
= BSF_DEBUGGING
;
2663 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2667 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2671 dst
->symbol
.udata
.i
= 0;
2672 dst
->lineno
= (alent
*) NULL
;
2673 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
2675 number_of_symbols
++;
2676 } /* walk the native symtab */
2677 } /* bfdize the native symtab */
2679 obj_symbols (abfd
) = cached_area
;
2680 obj_raw_syments (abfd
) = native_symbols
;
2682 bfd_get_symcount (abfd
) = number_of_symbols
;
2683 obj_convert (abfd
) = table_ptr
;
2684 /* Slurp the line tables for each section too */
2690 coff_slurp_line_table (abfd
, p
);
2695 } /* coff_slurp_symbol_table() */
2697 /* Check whether a symbol is globally visible. This is used by the
2698 COFF backend linker code in cofflink.c, since a couple of targets
2699 have globally visible symbols which are not class C_EXT. This
2700 function need not handle the case of n_class == C_EXT. */
2702 #undef OTHER_GLOBAL_CLASS
2705 #define OTHER_GLOBAL_CLASS C_LEAFEXT
2709 #define OTHER_GLOBAL_CLASS C_HIDEXT
2713 #define OTHER_GLOBAL_CLASS C_SECTION
2716 #ifdef OTHER_GLOBAL_CLASS
2719 coff_sym_is_global (abfd
, syment
)
2721 struct internal_syment
*syment
;
2723 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
2728 #undef OTHER_GLOBAL_CLASS
2730 #else /* ! defined (OTHER_GLOBAL_CLASS) */
2732 /* sym_is_global should not be defined if it has nothing to do. */
2734 #define coff_sym_is_global 0
2736 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
2742 Coff relocations are easily transformed into the internal BFD form
2745 Reading a coff relocation table is done in the following stages:
2747 o Read the entire coff relocation table into memory.
2749 o Process each relocation in turn; first swap it from the
2750 external to the internal form.
2752 o Turn the symbol referenced in the relocation's symbol index
2753 into a pointer into the canonical symbol table.
2754 This table is the same as the one returned by a call to
2755 @code{bfd_canonicalize_symtab}. The back end will call that
2756 routine and save the result if a canonicalization hasn't been done.
2758 o The reloc index is turned into a pointer to a howto
2759 structure, in a back end specific way. For instance, the 386
2760 and 960 use the @code{r_type} to directly produce an index
2761 into a howto table vector; the 88k subtracts a number from the
2762 @code{r_type} field and creates an addend field.
2768 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2770 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2771 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2772 coffsym = (obj_symbols (abfd) \
2773 + (cache_ptr->sym_ptr_ptr - symbols)); \
2775 coffsym = coff_symbol_from (abfd, ptr); \
2776 if (coffsym != (coff_symbol_type *) NULL \
2777 && coffsym->native->u.syment.n_scnum == 0) \
2778 cache_ptr->addend = 0; \
2779 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2780 && ptr->section != (asection *) NULL) \
2781 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2783 cache_ptr->addend = 0; \
2788 coff_slurp_reloc_table (abfd
, asect
, symbols
)
2793 RELOC
*native_relocs
;
2794 arelent
*reloc_cache
;
2799 if (asect
->relocation
)
2801 if (asect
->reloc_count
== 0)
2803 if (asect
->flags
& SEC_CONSTRUCTOR
)
2805 if (!coff_slurp_symbol_table (abfd
))
2808 (RELOC
*) buy_and_read (abfd
,
2812 asect
->reloc_count
));
2813 reloc_cache
= (arelent
*)
2814 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
2816 if (reloc_cache
== NULL
)
2818 bfd_set_error (bfd_error_no_memory
);
2823 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2825 #ifdef RELOC_PROCESSING
2826 struct internal_reloc dst
;
2827 struct external_reloc
*src
;
2829 cache_ptr
= reloc_cache
+ idx
;
2830 src
= native_relocs
+ idx
;
2831 coff_swap_reloc_in (abfd
, src
, &dst
);
2833 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
2835 struct internal_reloc dst
;
2837 struct external_reloc
*src
;
2839 cache_ptr
= reloc_cache
+ idx
;
2840 src
= native_relocs
+ idx
;
2842 coff_swap_reloc_in (abfd
, src
, &dst
);
2845 cache_ptr
->address
= dst
.r_vaddr
;
2847 if (dst
.r_symndx
!= -1)
2849 /* @@ Should never be greater than count of symbols! */
2850 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
2852 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[dst
.r_symndx
];
2853 ptr
= *(cache_ptr
->sym_ptr_ptr
);
2857 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
2861 /* The symbols definitions that we have read in have been
2862 relocated as if their sections started at 0. But the offsets
2863 refering to the symbols in the raw data have not been
2864 modified, so we have to have a negative addend to compensate.
2866 Note that symbols which used to be common must be left alone */
2868 /* Calculate any reloc addend by looking at the symbol */
2869 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
2871 cache_ptr
->address
-= asect
->vma
;
2872 /* !! cache_ptr->section = (asection *) NULL;*/
2874 /* Fill in the cache_ptr->howto field from dst.r_type */
2875 RTYPE2HOWTO (cache_ptr
, &dst
);
2880 asect
->relocation
= reloc_cache
;
2884 #ifndef coff_rtype_to_howto
2887 /* Get the howto structure for a reloc. This is only used if the file
2888 including this one defines coff_relocate_section to be
2889 _bfd_coff_generic_relocate_section, so it is OK if it does not
2890 always work. It is the responsibility of the including file to
2891 make sure it is reasonable if it is needed. */
2893 static reloc_howto_type
*coff_rtype_to_howto
2894 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
2895 struct coff_link_hash_entry
*, struct internal_syment
*,
2899 static reloc_howto_type
*
2900 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
2903 struct internal_reloc
*rel
;
2904 struct coff_link_hash_entry
*h
;
2905 struct internal_syment
*sym
;
2910 RTYPE2HOWTO (&genrel
, rel
);
2911 return genrel
.howto
;
2914 #else /* ! defined (RTYPE2HOWTO) */
2916 #define coff_rtype_to_howto NULL
2918 #endif /* ! defined (RTYPE2HOWTO) */
2919 #endif /* ! defined (coff_rtype_to_howto) */
2921 /* This is stupid. This function should be a boolean predicate. */
2923 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
2929 arelent
*tblptr
= section
->relocation
;
2930 unsigned int count
= 0;
2933 if (section
->flags
& SEC_CONSTRUCTOR
)
2935 /* this section has relocs made up by us, they are not in the
2936 file, so take them out of their chain and place them into
2937 the data area provided */
2938 arelent_chain
*chain
= section
->constructor_chain
;
2939 for (count
= 0; count
< section
->reloc_count
; count
++)
2941 *relptr
++ = &chain
->relent
;
2942 chain
= chain
->next
;
2948 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
2951 tblptr
= section
->relocation
;
2953 for (; count
++ < section
->reloc_count
;)
2954 *relptr
++ = tblptr
++;
2959 return section
->reloc_count
;
2964 coff_sym_filepos (abfd
)
2967 return obj_sym_filepos (abfd
);
2971 #ifndef coff_reloc16_estimate
2972 #define coff_reloc16_estimate dummy_reloc16_estimate
2975 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
2977 asection
*input_section
;
2979 unsigned int shrink
;
2980 struct bfd_link_info
*link_info
;
2987 #ifndef coff_reloc16_extra_cases
2988 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
2989 /* This works even if abort is not declared in any header file. */
2991 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
2994 struct bfd_link_info
*link_info
;
2995 struct bfd_link_order
*link_order
;
2998 unsigned int *src_ptr
;
2999 unsigned int *dst_ptr
;
3001 fprintf (stderr
, "%s\n", reloc
->howto
->name
);
3006 /* If coff_relocate_section is defined, we can use the optimized COFF
3007 backend linker. Otherwise we must continue to use the old linker. */
3008 #ifdef coff_relocate_section
3009 #ifndef coff_bfd_link_hash_table_create
3010 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3012 #ifndef coff_bfd_link_add_symbols
3013 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3015 #ifndef coff_bfd_final_link
3016 #define coff_bfd_final_link _bfd_coff_final_link
3018 #else /* ! defined (coff_relocate_section) */
3019 #define coff_relocate_section NULL
3020 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3021 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3022 #define coff_bfd_final_link _bfd_generic_final_link
3023 #endif /* ! defined (coff_relocate_section) */
3024 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3026 #ifndef coff_adjust_symndx
3027 #define coff_adjust_symndx NULL
3030 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
3032 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
3033 coff_swap_aux_out
, coff_swap_sym_out
,
3034 coff_swap_lineno_out
, coff_swap_reloc_out
,
3035 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
3036 coff_swap_scnhdr_out
,
3037 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
3038 #ifdef COFF_LONG_FILENAMES
3043 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
3044 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
3045 coff_mkobject_hook
, styp_to_sec_flags
, coff_make_section_hook
,
3046 coff_set_alignment_hook
, coff_slurp_symbol_table
, symname_in_debug_hook
,
3047 coff_reloc16_extra_cases
, coff_reloc16_estimate
,
3048 coff_sym_is_global
, coff_compute_section_file_positions
,
3049 coff_relocate_section
, coff_rtype_to_howto
, coff_adjust_symndx
3052 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3053 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3054 #define coff_get_section_contents _bfd_generic_get_section_contents
3056 #define coff_bfd_copy_private_symbol_data \
3057 _bfd_generic_bfd_copy_private_symbol_data
3058 #define coff_bfd_copy_private_section_data \
3059 _bfd_generic_bfd_copy_private_section_data
3060 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3061 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3062 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3064 #ifndef coff_bfd_is_local_label
3065 #define coff_bfd_is_local_label bfd_generic_is_local_label
3067 #ifndef coff_read_minisymbols
3068 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3070 #ifndef coff_minisymbol_to_symbol
3071 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3074 /* The reloc lookup routine must be supplied by each individual COFF
3076 #ifndef coff_bfd_reloc_type_lookup
3077 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3080 #ifndef coff_bfd_get_relocated_section_contents
3081 #define coff_bfd_get_relocated_section_contents \
3082 bfd_generic_get_relocated_section_contents
3084 #ifndef coff_bfd_relax_section
3085 #define coff_bfd_relax_section bfd_generic_relax_section