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_pointerize_aux. *}
269 .unsigned int fix_scnlen : 1;
271 . {* The container for the symbol structure as read and translated
275 . union internal_auxent auxent;
276 . struct internal_syment syment;
278 .} combined_entry_type;
281 .{* Each canonical asymbol really looks like this: *}
283 .typedef struct coff_symbol_struct
285 . {* The actual symbol which the rest of BFD works with *}
288 . {* A pointer to the hidden information for this symbol *}
289 .combined_entry_type *native;
291 . {* A pointer to the linenumber information for this symbol *}
292 .struct lineno_cache_entry *lineno;
294 . {* Have the line numbers been relocated yet ? *}
295 .boolean done_lineno;
301 #if defined(COFF_IMAGE_WITH_PE) || (defined(COFF_OBJ_WITH_PE) && defined(PPC))
304 #include "coffswap.h"
308 /* void warning(); */
311 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
312 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
313 * NOTE: If you add to/change this routine, you should mirror the changes
314 * in styp_to_sec_flags().
317 sec_to_styp_flags (sec_name
, sec_flags
)
318 CONST
char *sec_name
;
323 if (!strcmp (sec_name
, _TEXT
))
325 styp_flags
= STYP_TEXT
;
327 else if (!strcmp (sec_name
, _DATA
))
329 styp_flags
= STYP_DATA
;
331 else if (!strcmp (sec_name
, _BSS
))
333 styp_flags
= STYP_BSS
;
336 else if (!strcmp (sec_name
, _COMMENT
))
338 styp_flags
= STYP_INFO
;
339 #endif /* _COMMENT */
342 else if (!strcmp (sec_name
, _LIB
))
344 styp_flags
= STYP_LIB
;
348 else if (!strcmp (sec_name
, _LIT
))
350 styp_flags
= STYP_LIT
;
353 else if (!strcmp (sec_name
, ".debug"))
356 styp_flags
= STYP_DEBUG
;
358 styp_flags
= STYP_INFO
;
361 else if (!strncmp (sec_name
, ".stab", 5))
363 styp_flags
= STYP_INFO
;
366 else if (!strcmp (sec_name
, ".edata"))
368 styp_flags
= STYP_DATA
;
371 /* Try and figure out what it should be */
372 else if (sec_flags
& SEC_CODE
)
374 styp_flags
= STYP_TEXT
;
376 else if (sec_flags
& SEC_DATA
)
378 styp_flags
= STYP_DATA
;
380 else if (sec_flags
& SEC_READONLY
)
382 #ifdef STYP_LIT /* 29k readonly text/data section */
383 styp_flags
= STYP_LIT
;
385 styp_flags
= STYP_TEXT
;
386 #endif /* STYP_LIT */
388 else if (sec_flags
& SEC_LOAD
)
390 styp_flags
= STYP_TEXT
;
392 else if (sec_flags
& SEC_ALLOC
)
394 styp_flags
= STYP_BSS
;
398 if ((sec_flags
& (SEC_NEVER_LOAD
| SEC_COFF_SHARED_LIBRARY
)) != 0)
399 styp_flags
|= STYP_NOLOAD
;
405 * Return a word with SEC_* flags set to represent the incoming
406 * STYP_* flags (from scnhdr.s_flags). The inverse of this
407 * function is sec_to_styp_flags().
408 * NOTE: If you add to/change this routine, you should mirror the changes
409 * in sec_to_styp_flags().
412 styp_to_sec_flags (abfd
, hdr
, name
)
417 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
418 long styp_flags
= internal_s
->s_flags
;
419 flagword sec_flags
= 0;
422 if (styp_flags
& STYP_NOLOAD
)
424 sec_flags
|= SEC_NEVER_LOAD
;
426 #endif /* STYP_NOLOAD */
428 /* For 386 COFF, at least, an unloadable text or data section is
429 actually a shared library section. */
430 if (styp_flags
& STYP_TEXT
)
432 if (sec_flags
& SEC_NEVER_LOAD
)
433 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
435 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
437 else if (styp_flags
& STYP_DATA
)
439 if (sec_flags
& SEC_NEVER_LOAD
)
440 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
442 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
444 else if (styp_flags
& STYP_BSS
)
446 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
447 if (sec_flags
& SEC_NEVER_LOAD
)
448 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
451 sec_flags
|= SEC_ALLOC
;
453 else if (styp_flags
& STYP_INFO
)
455 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
456 defined. coff_compute_section_file_positions uses
457 COFF_PAGE_SIZE to ensure that the low order bits of the
458 section VMA and the file offset match. If we don't know
459 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
460 and demand page loading of the file will fail. */
461 #ifdef COFF_PAGE_SIZE
462 sec_flags
|= SEC_DEBUGGING
;
465 else if (strcmp (name
, _TEXT
) == 0)
467 if (sec_flags
& SEC_NEVER_LOAD
)
468 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
470 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
472 else if (strcmp (name
, _DATA
) == 0)
474 if (sec_flags
& SEC_NEVER_LOAD
)
475 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
477 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
479 else if (strcmp (name
, _BSS
) == 0)
481 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
482 if (sec_flags
& SEC_NEVER_LOAD
)
483 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
486 sec_flags
|= SEC_ALLOC
;
488 else if (strcmp (name
, ".debug") == 0
490 || strcmp (name
, _COMMENT
) == 0
492 || strncmp (name
, ".stab", 5) == 0)
494 #ifdef COFF_PAGE_SIZE
495 sec_flags
|= SEC_DEBUGGING
;
499 else if (strcmp (name
, _LIB
) == 0)
503 else if (strcmp (name
, _LIT
) == 0)
505 sec_flags
= SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
;
510 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
513 #ifdef STYP_LIT /* A29k readonly text/data section type */
514 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
516 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
518 #endif /* STYP_LIT */
519 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
520 if (styp_flags
& STYP_OTHER_LOAD
)
522 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
524 #endif /* STYP_SDATA */
529 #define get_index(symbol) ((symbol)->udata.i)
533 bfd_coff_backend_data
537 Special entry points for gdb to swap in coff symbol table parts:
540 . void (*_bfd_coff_swap_aux_in) PARAMS ((
549 . void (*_bfd_coff_swap_sym_in) PARAMS ((
554 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
560 Special entry points for gas to swap out coff parts:
562 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
571 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
576 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
581 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
586 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
591 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
596 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
602 Special entry points for generic COFF routines to call target
603 dependent COFF routines:
605 . unsigned int _bfd_filhsz;
606 . unsigned int _bfd_aoutsz;
607 . unsigned int _bfd_scnhsz;
608 . unsigned int _bfd_symesz;
609 . unsigned int _bfd_auxesz;
610 . unsigned int _bfd_relsz;
611 . unsigned int _bfd_linesz;
612 . boolean _bfd_coff_long_filenames;
613 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
617 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
621 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
625 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
629 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
631 . PTR internal_filehdr));
632 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
634 . PTR internal_filehdr));
635 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
637 . PTR internal_filehdr,
638 . PTR internal_aouthdr));
639 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
641 . PTR internal_scnhdr,
642 . const char *name));
643 . void (*_bfd_set_alignment_hook) PARAMS ((
646 . PTR internal_scnhdr));
647 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
649 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
651 . struct internal_syment *sym));
652 . boolean (*_bfd_coff_pointerize_aux_hook) PARAMS ((
654 . combined_entry_type *table_base,
655 . combined_entry_type *symbol,
656 . unsigned int indaux,
657 . combined_entry_type *aux));
658 . boolean (*_bfd_coff_print_aux) PARAMS ((
661 . combined_entry_type *table_base,
662 . combined_entry_type *symbol,
663 . combined_entry_type *aux,
664 . unsigned int indaux));
665 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
667 . struct bfd_link_info *link_info,
668 . struct bfd_link_order *link_order,
671 . unsigned int *src_ptr,
672 . unsigned int *dst_ptr));
673 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
675 . asection *input_section,
677 . unsigned int shrink,
678 . struct bfd_link_info *link_info));
679 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
681 . struct internal_syment *));
682 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
684 . boolean (*_bfd_coff_start_final_link) PARAMS ((
686 . struct bfd_link_info *info));
687 . boolean (*_bfd_coff_relocate_section) PARAMS ((
689 . struct bfd_link_info *info,
691 . asection *input_section,
692 . bfd_byte *contents,
693 . struct internal_reloc *relocs,
694 . struct internal_syment *syms,
695 . asection **sections));
696 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
699 . struct internal_reloc *rel,
700 . struct coff_link_hash_entry *h,
701 . struct internal_syment *sym,
702 . bfd_vma *addendp));
703 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
705 . struct bfd_link_info *info,
708 . struct internal_reloc *reloc,
709 . boolean *adjustedp));
711 .} bfd_coff_backend_data;
713 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
715 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
716 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
718 .#define bfd_coff_swap_sym_in(a,e,i) \
719 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
721 .#define bfd_coff_swap_lineno_in(a,e,i) \
722 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
724 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
725 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
727 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
728 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
730 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
731 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
733 .#define bfd_coff_swap_sym_out(abfd, i,o) \
734 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
736 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
737 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
739 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
740 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
742 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
743 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
745 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
746 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
747 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
748 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
749 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
750 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
751 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
752 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
753 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
754 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
756 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
757 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
759 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
760 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
762 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
763 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
765 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
766 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
768 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
769 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
770 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
771 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
773 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
774 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
776 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
777 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
779 .#define bfd_coff_slurp_symbol_table(abfd)\
780 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
782 .#define bfd_coff_symname_in_debug(abfd, sym)\
783 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
785 .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
786 . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
787 . (abfd, file, base, symbol, aux, indaux))
789 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
790 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
791 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
793 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
794 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
795 . (abfd, section, reloc, shrink, link_info))
797 .#define bfd_coff_sym_is_global(abfd, sym)\
798 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
801 .#define bfd_coff_compute_section_file_positions(abfd)\
802 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
805 .#define bfd_coff_start_final_link(obfd, info)\
806 . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
808 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
809 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
810 . (obfd, info, ibfd, o, con, rel, isyms, secs))
811 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
812 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
813 . (abfd, sec, rel, h, sym, addendp))
814 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
815 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
816 . (obfd, info, ibfd, sec, rel, adjustedp))
820 /* See whether the magic number matches. */
823 coff_bad_format_hook (abfd
, filehdr
)
827 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
829 if (BADMAG (*internal_f
))
832 /* if the optional header is NULL or not the correct size then
833 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
834 and Intel 960 readwrite headers (I960WRMAGIC) is that the
835 optional header is of a different size.
837 But the mips keeps extra stuff in it's opthdr, so dont check
841 #if defined(M88) || defined(I960)
842 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
850 initialize a section structure with information peculiar to this
851 particular implementation of coff
855 coff_new_section_hook (abfd
, section
)
859 section
->alignment_power
= COFF_DEFAULT_SECTION_ALIGNMENT_POWER
;
861 /* Allocate aux records for section symbols, to store size and
864 @@ Shouldn't use constant multiplier here! */
865 coffsymbol (section
->symbol
)->native
=
866 (combined_entry_type
*) bfd_zalloc (abfd
,
867 sizeof (combined_entry_type
) * 10);
869 /* The .stab section must be aligned to 2**2 at most, because
870 otherwise there may be gaps in the section which gdb will not
871 know how to interpret. Examining the section name is a hack, but
872 that is also how gdb locates the section.
873 We need to handle the .ctors and .dtors sections similarly, to
874 avoid introducing null words in the tables. */
875 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 2
876 && (strncmp (section
->name
, ".stab", 5) == 0
877 || strcmp (section
->name
, ".ctors") == 0
878 || strcmp (section
->name
, ".dtors") == 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)
910 #ifndef coff_mkobject
915 coff_data_type
*coff
;
917 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*) bfd_zalloc (abfd
, sizeof (coff_data_type
));
918 if (abfd
->tdata
.coff_obj_data
== 0)
920 bfd_set_error (bfd_error_no_memory
);
923 coff
= coff_data (abfd
);
924 coff
->symbols
= (coff_symbol_type
*) NULL
;
925 coff
->conversion_table
= (unsigned int *) NULL
;
926 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
928 /* make_abs_section(abfd);*/
934 /* Create the COFF backend specific information. */
935 #ifndef coff_mkobject_hook
937 coff_mkobject_hook (abfd
, filehdr
, aouthdr
)
942 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
943 coff_data_type
*coff
;
945 if (coff_mkobject (abfd
) == false)
948 coff
= coff_data (abfd
);
950 coff
->sym_filepos
= internal_f
->f_symptr
;
952 /* These members communicate important constants about the symbol
953 table to GDB's symbol-reading code. These `constants'
954 unfortunately vary among coff implementations... */
955 coff
->local_n_btmask
= N_BTMASK
;
956 coff
->local_n_btshft
= N_BTSHFT
;
957 coff
->local_n_tmask
= N_TMASK
;
958 coff
->local_n_tshift
= N_TSHIFT
;
959 coff
->local_symesz
= SYMESZ
;
960 coff
->local_auxesz
= AUXESZ
;
961 coff
->local_linesz
= LINESZ
;
963 obj_raw_syment_count (abfd
) =
964 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
)
992 arch
= bfd_arch_powerpc
;
993 machine
= 0; /* what does this mean? (krk) */
999 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
1000 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
1001 arch
= bfd_arch_i386
;
1005 #ifdef A29K_MAGIC_BIG
1006 case A29K_MAGIC_BIG
:
1007 case A29K_MAGIC_LITTLE
:
1008 arch
= bfd_arch_a29k
;
1014 arch
= bfd_arch_arm
;
1021 #ifdef MC68KBCSMAGIC
1024 #ifdef APOLLOM68KMAGIC
1025 case APOLLOM68KMAGIC
:
1027 #ifdef LYNXCOFFMAGIC
1030 arch
= bfd_arch_m68k
;
1038 arch
= bfd_arch_m88k
;
1044 arch
= bfd_arch_z8k
;
1045 switch (internal_f
->f_flags
& F_MACHMASK
)
1048 machine
= bfd_mach_z8001
;
1051 machine
= bfd_mach_z8002
;
1062 arch
= bfd_arch_i960
;
1063 switch (F_I960TYPE
& internal_f
->f_flags
)
1067 machine
= bfd_mach_i960_core
;
1070 machine
= bfd_mach_i960_kb_sb
;
1073 machine
= bfd_mach_i960_mc
;
1076 machine
= bfd_mach_i960_xa
;
1079 machine
= bfd_mach_i960_ca
;
1082 machine
= bfd_mach_i960_ka_sa
;
1084 /* start-sanitize-i960xl */
1086 machine
= bfd_mach_i960_xl
;
1088 /* end-sanitize-i960xl */
1099 /* PowerPC Macs use the same magic numbers as RS/6000 (because
1100 that's how they were bootstrapped originally), but they are
1101 always PowerPC architecture. */
1102 arch
= bfd_arch_powerpc
;
1105 /* FIXME The architecture and machine can now (as of AIX 4.1) be
1106 identified by looking at fields in the a.out header. */
1107 arch
= bfd_arch_rs6000
;
1109 #endif /* POWERMAC */
1115 arch
= bfd_arch_we32k
;
1122 arch
= bfd_arch_h8300
;
1123 machine
= bfd_mach_h8300
;
1124 /* !! FIXME this probably isn't the right place for this */
1125 abfd
->flags
|= BFD_IS_RELAXABLE
;
1131 arch
= bfd_arch_h8300
;
1132 machine
= bfd_mach_h8300h
;
1133 /* !! FIXME this probably isn't the right place for this */
1134 abfd
->flags
|= BFD_IS_RELAXABLE
;
1138 #ifdef SH_ARCH_MAGIC_BIG
1139 case SH_ARCH_MAGIC_BIG
:
1140 case SH_ARCH_MAGIC_LITTLE
:
1148 arch
= bfd_arch_h8500
;
1155 #ifdef LYNXCOFFMAGIC
1158 arch
= bfd_arch_sparc
;
1163 default: /* Unreadable input file type */
1164 arch
= bfd_arch_obscure
;
1168 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1172 #ifdef SYMNAME_IN_DEBUG
1175 symname_in_debug_hook (abfd
, sym
)
1177 struct internal_syment
*sym
;
1179 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1184 #define symname_in_debug_hook \
1185 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1191 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1193 static boolean coff_pointerize_aux_hook
1194 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1195 unsigned int, combined_entry_type
*));
1199 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1201 combined_entry_type
*table_base
;
1202 combined_entry_type
*symbol
;
1203 unsigned int indaux
;
1204 combined_entry_type
*aux
;
1206 int class = symbol
->u
.syment
.n_sclass
;
1208 if ((class == C_EXT
|| class == C_HIDEXT
)
1209 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1211 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
1213 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
1214 table_base
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
1215 aux
->fix_scnlen
= 1;
1218 /* Return true to indicate that the caller should not do any
1219 further work on this auxent. */
1223 /* Return false to indicate that this auxent should be handled by
1231 /* We don't want to pointerize bal entries. */
1233 static boolean coff_pointerize_aux_hook
1234 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1235 unsigned int, combined_entry_type
*));
1239 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1241 combined_entry_type
*table_base
;
1242 combined_entry_type
*symbol
;
1243 unsigned int indaux
;
1244 combined_entry_type
*aux
;
1246 /* Return true if we don't want to pointerize this aux entry, which
1247 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1248 return indaux
== 1 && symbol
->u
.syment
.n_sclass
== C_LEAFPROC
;
1253 #define coff_pointerize_aux_hook 0
1256 #endif /* ! RS6000COFF_C */
1258 /* Print an aux entry. This returns true if it has printed it. */
1260 static boolean coff_print_aux
1261 PARAMS ((bfd
*, FILE *, combined_entry_type
*, combined_entry_type
*,
1262 combined_entry_type
*, unsigned int));
1265 coff_print_aux (abfd
, file
, table_base
, symbol
, aux
, indaux
)
1268 combined_entry_type
*table_base
;
1269 combined_entry_type
*symbol
;
1270 combined_entry_type
*aux
;
1271 unsigned int indaux
;
1274 if ((symbol
->u
.syment
.n_sclass
== C_EXT
1275 || symbol
->u
.syment
.n_sclass
== C_HIDEXT
)
1276 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1278 /* This is a csect entry. */
1279 fprintf (file
, "AUX ");
1280 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) != XTY_LD
)
1282 BFD_ASSERT (! aux
->fix_scnlen
);
1283 fprintf (file
, "val %5ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1287 fprintf (file
, "indx ");
1288 if (! aux
->fix_scnlen
)
1289 fprintf (file
, "%4ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1291 fprintf (file
, "%4ld",
1292 (long) (aux
->u
.auxent
.x_csect
.x_scnlen
.p
- table_base
));
1295 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1296 aux
->u
.auxent
.x_csect
.x_parmhash
,
1297 (unsigned int) aux
->u
.auxent
.x_csect
.x_snhash
,
1298 SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
),
1299 SMTYP_ALIGN (aux
->u
.auxent
.x_csect
.x_smtyp
),
1300 (unsigned int) aux
->u
.auxent
.x_csect
.x_smclas
,
1301 aux
->u
.auxent
.x_csect
.x_stab
,
1302 (unsigned int) aux
->u
.auxent
.x_csect
.x_snstab
);
1307 /* Return false to indicate that no special action was taken. */
1315 To write relocations, the back end steps though the
1316 canonical relocation table and create an
1317 @code{internal_reloc}. The symbol index to use is removed from
1318 the @code{offset} field in the symbol table supplied. The
1319 address comes directly from the sum of the section base
1320 address and the relocation offset; the type is dug directly
1321 from the howto field. Then the @code{internal_reloc} is
1322 swapped into the shape of an @code{external_reloc} and written
1328 coff_write_relocs (abfd
, first_undef
)
1333 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1336 struct external_reloc dst
;
1338 arelent
**p
= s
->orelocation
;
1339 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1341 for (i
= 0; i
< s
->reloc_count
; i
++)
1343 struct internal_reloc n
;
1345 memset ((PTR
) & n
, 0, sizeof (n
));
1347 /* Now we've renumbered the symbols we know where the
1348 undefined symbols live in the table. Check the reloc
1349 entries for symbols who's output bfd isn't the right one.
1350 This is because the symbol was undefined (which means
1351 that all the pointers are never made to point to the same
1352 place). This is a bad thing,'cause the symbols attached
1353 to the output bfd are indexed, so that the relocation
1354 entries know which symbol index they point to. So we
1355 have to look up the output symbol here. */
1357 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1360 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1361 asymbol
**outsyms
= abfd
->outsymbols
;
1362 for (i
= first_undef
; outsyms
[i
]; i
++)
1364 const char *intable
= outsyms
[i
]->name
;
1365 if (strcmp (intable
, sname
) == 0) {
1366 /* got a hit, so repoint the reloc */
1367 q
->sym_ptr_ptr
= outsyms
+ i
;
1373 n
.r_vaddr
= q
->address
+ s
->vma
;
1376 /* The 29k const/consth reloc pair is a real kludge. The consth
1377 part doesn't have a symbol; it has an offset. So rebuilt
1379 if (q
->howto
->type
== R_IHCONST
)
1380 n
.r_symndx
= q
->addend
;
1385 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1386 /* This is a relocation relative to the absolute symbol. */
1390 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1391 /* Take notice if the symbol reloc points to a symbol
1392 we don't have in our symbol table. What should we
1394 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1399 #ifdef SWAP_OUT_RELOC_OFFSET
1400 n
.r_offset
= q
->addend
;
1404 /* Work out reloc type from what is required */
1405 SELECT_RELOC (n
, q
->howto
);
1407 n
.r_type
= q
->howto
->type
;
1409 coff_swap_reloc_out (abfd
, &n
, &dst
);
1410 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1418 /* Set flags and magic number of a coff file from architecture and machine
1419 type. Result is true if we can represent the arch&type, false if not. */
1422 coff_set_flags (abfd
, magicp
, flagsp
)
1425 unsigned short *flagsp
;
1427 switch (bfd_get_arch (abfd
))
1432 switch (bfd_get_mach (abfd
))
1434 case bfd_mach_z8001
:
1437 case bfd_mach_z8002
:
1451 *magicp
= I960ROMAGIC
;
1453 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1454 I960RWMAGIC); FIXME???
1456 switch (bfd_get_mach (abfd
))
1458 case bfd_mach_i960_core
:
1461 case bfd_mach_i960_kb_sb
:
1464 case bfd_mach_i960_mc
:
1467 case bfd_mach_i960_xa
:
1470 case bfd_mach_i960_ca
:
1473 case bfd_mach_i960_ka_sa
:
1476 /* start-sanitize-i960xl */
1477 case bfd_mach_i960_xl
:
1480 /* end-sanitize-i960xl */
1495 case bfd_arch_powerpc
:
1502 *magicp
= I386MAGIC
;
1504 /* Just overwrite the usual value if we're doing Lynx. */
1505 *magicp
= LYNXCOFFMAGIC
;
1512 #ifdef APOLLOM68KMAGIC
1513 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1515 *magicp
= MC68MAGIC
;
1518 /* Just overwrite the usual value if we're doing Lynx. */
1519 *magicp
= LYNXCOFFMAGIC
;
1527 *magicp
= MC88OMAGIC
;
1532 case bfd_arch_h8300
:
1533 switch (bfd_get_mach (abfd
))
1535 case bfd_mach_h8300
:
1536 *magicp
= H8300MAGIC
;
1538 case bfd_mach_h8300h
:
1539 *magicp
= H8300HMAGIC
;
1545 #ifdef SH_ARCH_MAGIC_BIG
1547 if (abfd
->xvec
->byteorder_big_p
)
1548 *magicp
= SH_ARCH_MAGIC_BIG
;
1550 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1556 case bfd_arch_sparc
:
1557 *magicp
= SPARCMAGIC
;
1559 /* Just overwrite the usual value if we're doing Lynx. */
1560 *magicp
= LYNXCOFFMAGIC
;
1567 case bfd_arch_h8500
:
1568 *magicp
= H8500MAGIC
;
1572 #ifdef A29K_MAGIC_BIG
1574 if (abfd
->xvec
->byteorder_big_p
)
1575 *magicp
= A29K_MAGIC_BIG
;
1577 *magicp
= A29K_MAGIC_LITTLE
;
1583 case bfd_arch_we32k
:
1584 *magicp
= WE32KMAGIC
;
1590 case bfd_arch_rs6000
:
1592 case bfd_arch_powerpc
:
1594 *magicp
= U802TOCMAGIC
;
1599 default: /* Unknown architecture */
1600 /* return false; -- fall through to "return false" below, to avoid
1601 "statement never reached" errors on the one below. */
1610 coff_set_arch_mach (abfd
, arch
, machine
)
1612 enum bfd_architecture arch
;
1613 unsigned long machine
;
1616 unsigned short dummy2
;
1618 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
1621 if (arch
!= bfd_arch_unknown
&&
1622 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
1623 return false; /* We can't represent this type */
1625 return true; /* We're easy ... */
1629 /* Calculate the file position for each section. */
1632 coff_compute_section_file_positions (abfd
)
1636 asection
*previous
= (asection
*) NULL
;
1637 file_ptr sofar
= FILHSZ
;
1645 #ifdef COFF_IMAGE_WITH_PE
1647 if (coff_data (abfd
)->link_info
)
1649 page_size
= pe_data (abfd
)->pe_opthdr
.FileAlignment
;
1652 page_size
= PE_DEF_FILE_ALIGNMENT
;
1653 #elif defined (COFF_PAGE_SIZE)
1654 int page_size
= COFF_PAGE_SIZE
;
1657 if (bfd_get_start_address (abfd
))
1659 /* A start address may have been added to the original file. In this
1660 case it will need an optional header to record it. */
1661 abfd
->flags
|= EXEC_P
;
1664 if (abfd
->flags
& EXEC_P
)
1667 sofar
+= abfd
->section_count
* SCNHSZ
;
1668 for (current
= abfd
->sections
, count
= 1;
1669 current
!= (asection
*) NULL
;
1670 current
= current
->next
, ++count
)
1672 current
->target_index
= count
;
1674 /* Only deal with sections which have contents */
1675 if (!(current
->flags
& SEC_HAS_CONTENTS
))
1679 /* Do not include the .junk section. This is where we collect section
1680 data which we don't need. This is mainly the MS .debug$ data which
1681 stores codeview debug data. */
1682 if (strcmp (current
->name
, ".junk") == 0)
1688 /* Align the sections in the file to the same boundary on
1689 which they are aligned in virtual memory. I960 doesn't
1690 do this (FIXME) so we can stay in sync with Intel. 960
1691 doesn't yet page from files... */
1694 /* make sure this section is aligned on the right boundary - by
1695 padding the previous section up if necessary */
1698 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1699 if (previous
!= (asection
*) NULL
)
1701 previous
->_raw_size
+= sofar
- old_sofar
;
1707 /* In demand paged files the low order bits of the file offset
1708 must match the low order bits of the virtual address. */
1709 #ifdef COFF_PAGE_SIZE
1710 if ((abfd
->flags
& D_PAGED
) != 0
1711 && (current
->flags
& SEC_ALLOC
) != 0)
1712 sofar
+= (current
->vma
- sofar
) % page_size
;
1714 current
->filepos
= sofar
;
1716 #ifdef COFF_IMAGE_WITH_PE
1717 /* With PE we have to pad each section to be a multiple of its page size
1718 too, and remember both sizes. Cooked_size becomes very useful. */
1719 current
->_cooked_size
= current
->_raw_size
;
1720 current
->_raw_size
= (current
->_raw_size
+ page_size
-1) & -page_size
;
1723 sofar
+= current
->_raw_size
;
1726 /* make sure that this section is of the right size too */
1728 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1729 current
->_raw_size
+= sofar
- old_sofar
;
1733 /* Force .lib sections to start at zero. The vma is then
1734 incremented in coff_set_section_contents. This is right for
1736 if (strcmp (current
->name
, _LIB
) == 0)
1737 bfd_set_section_vma (abfd
, current
, 0);
1743 obj_relocbase (abfd
) = sofar
;
1744 abfd
->output_has_begun
= true;
1748 #ifndef RS6000COFF_C
1750 /* If .file, .text, .data, .bss symbols are missing, add them. */
1751 /* @@ Should we only be adding missing symbols, or overriding the aux
1752 values for existing section symbols? */
1754 coff_add_missing_symbols (abfd
)
1757 unsigned int nsyms
= bfd_get_symcount (abfd
);
1758 asymbol
**sympp
= abfd
->outsymbols
;
1761 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
1763 for (i
= 0; i
< nsyms
; i
++)
1765 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
1769 /* only do this if there is a coff representation of the input
1771 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
1776 name
= csym
->symbol
.name
;
1779 if (!strcmp (name
, _TEXT
))
1782 else if (!strcmp (name
, ".wtext"))
1785 else if (!strcmp (name
, _DATA
))
1787 else if (!strcmp (name
, _BSS
))
1791 /* Now i == bfd_get_symcount (abfd). */
1792 /* @@ For now, don't deal with .file symbol. */
1795 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
1797 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
1798 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
1801 bfd_set_error (bfd_error_no_memory
);
1804 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
1807 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1811 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
1813 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
1815 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
1816 BFD_ASSERT (i
== nsyms
);
1817 bfd_set_symtab (abfd
, sympp2
, nsyms
);
1821 #endif /* ! defined (RS6000COFF_C) */
1828 coff_write_object_contents (abfd
)
1832 boolean hasrelocs
= false;
1833 boolean haslinno
= false;
1834 file_ptr reloc_base
;
1835 file_ptr lineno_base
;
1837 unsigned long reloc_size
= 0;
1838 unsigned long lnno_size
= 0;
1839 asection
*text_sec
= NULL
;
1840 asection
*data_sec
= NULL
;
1841 asection
*bss_sec
= NULL
;
1843 struct internal_filehdr internal_f
;
1844 struct internal_aouthdr internal_a
;
1846 bfd_set_error (bfd_error_system_call
);
1848 if (abfd
->output_has_begun
== false)
1849 coff_compute_section_file_positions (abfd
);
1851 reloc_base
= obj_relocbase (abfd
);
1853 /* Make a pass through the symbol table to count line number entries and
1854 put them into the correct asections */
1856 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
1858 /* Work out the size of the reloc and linno areas */
1860 for (current
= abfd
->sections
; current
!= NULL
; current
=
1862 reloc_size
+= current
->reloc_count
* RELSZ
;
1864 lineno_base
= reloc_base
+ reloc_size
;
1865 sym_base
= lineno_base
+ lnno_size
;
1867 /* Indicate in each section->line_filepos its actual file address */
1868 for (current
= abfd
->sections
; current
!= NULL
; current
=
1871 if (current
->lineno_count
)
1873 current
->line_filepos
= lineno_base
;
1874 current
->moving_line_filepos
= lineno_base
;
1875 lineno_base
+= current
->lineno_count
* LINESZ
;
1879 current
->line_filepos
= 0;
1881 if (current
->reloc_count
)
1883 current
->rel_filepos
= reloc_base
;
1884 reloc_base
+= current
->reloc_count
* RELSZ
;
1888 current
->rel_filepos
= 0;
1892 /* Write section headers to the file. */
1893 internal_f
.f_nscns
= 0;
1896 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1897 (FILHSZ
+ AOUTSZ
) : FILHSZ
),
1901 for (current
= abfd
->sections
;
1903 current
= current
->next
)
1905 struct internal_scnhdr section
;
1908 /* Do not include the .junk section. This is where we collect section
1909 data which we don't need. This is mainly the MS .debug$ data which
1910 stores codeview debug data. */
1911 if (strcmp (current
->name
, ".junk") == 0)
1916 /* If we've got a .reloc section, remember. */
1918 if (strcmp (current
->name
, ".reloc") == 0)
1920 pe_data (abfd
)->has_reloc_section
= 1;
1923 internal_f
.f_nscns
++;
1924 strncpy (&(section
.s_name
[0]), current
->name
, 8);
1926 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1927 Ian Taylor <ian@cygnus.com>. */
1928 if (strcmp (current
->name
, _LIB
) == 0)
1929 section
.s_vaddr
= 0;
1932 section
.s_vaddr
= current
->lma
;
1933 section
.s_paddr
= current
->lma
;
1934 section
.s_size
= current
->_raw_size
;
1937 section
.s_paddr
= current
->_cooked_size
;
1941 If this section has no size or is unloadable then the scnptr
1944 if (current
->_raw_size
== 0 ||
1945 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
1947 section
.s_scnptr
= 0;
1951 section
.s_scnptr
= current
->filepos
;
1953 section
.s_relptr
= current
->rel_filepos
;
1954 section
.s_lnnoptr
= current
->line_filepos
;
1955 section
.s_nreloc
= current
->reloc_count
;
1956 section
.s_nlnno
= current
->lineno_count
;
1957 if (current
->reloc_count
!= 0)
1959 if (current
->lineno_count
!= 0)
1962 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
1964 if (!strcmp (current
->name
, _TEXT
))
1968 else if (!strcmp (current
->name
, _DATA
))
1972 else if (!strcmp (current
->name
, _BSS
))
1978 section
.s_align
= (current
->alignment_power
1979 ? 1 << current
->alignment_power
1984 #ifdef COFF_IMAGE_WITH_PE
1985 /* suppress output of the sections if they are null. ld includes
1986 the bss and data sections even if there is no size assigned
1987 to them. NT loader doesn't like it if these section headers are
1988 included if the sections themselves are not needed */
1989 if (section
.s_size
== 0)
1990 internal_f
.f_nscns
--;
1995 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
1996 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2003 /* OK, now set up the filehdr... */
2005 /* Don't include the internal abs section in the section count */
2008 We will NOT put a fucking timestamp in the header here. Every time you
2009 put it back, I will come in and take it out again. I'm sorry. This
2010 field does not belong here. We fill it with a 0 so it compares the
2011 same but is not a reasonable time. -- gnu@cygnus.com
2013 internal_f
.f_timdat
= 0;
2015 internal_f
.f_flags
= 0;
2017 if (abfd
->flags
& EXEC_P
)
2018 internal_f
.f_opthdr
= AOUTSZ
;
2020 internal_f
.f_opthdr
= 0;
2023 internal_f
.f_flags
|= F_RELFLG
;
2025 internal_f
.f_flags
|= F_LNNO
;
2026 if (abfd
->flags
& EXEC_P
)
2027 internal_f
.f_flags
|= F_EXEC
;
2029 if (!abfd
->xvec
->byteorder_big_p
)
2030 internal_f
.f_flags
|= F_AR32WR
;
2032 internal_f
.f_flags
|= F_AR32W
;
2035 FIXME, should do something about the other byte orders and
2039 memset (&internal_a
, 0, sizeof internal_a
);
2041 /* Set up architecture-dependent stuff */
2044 unsigned int magic
= 0;
2045 unsigned short flags
= 0;
2046 coff_set_flags (abfd
, &magic
, &flags
);
2047 internal_f
.f_magic
= magic
;
2048 internal_f
.f_flags
|= flags
;
2049 /* ...and the "opt"hdr... */
2052 #ifdef ULTRA3 /* NYU's machine */
2053 /* FIXME: This is a bogus check. I really want to see if there
2054 * is a .shbss or a .shdata section, if so then set the magic
2055 * number to indicate a shared data executable.
2057 if (internal_f
.f_nscns
>= 7)
2058 internal_a
.magic
= SHMAGIC
; /* Shared magic */
2061 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
2062 #define __A_MAGIC_SET__
2065 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
2066 #define __A_MAGIC_SET__
2069 #define __A_MAGIC_SET__
2070 internal_a
.magic
= PAGEMAGICBCS
;
2074 #define __A_MAGIC_SET__
2075 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2078 #if defined(M68) || defined(WE32K) || defined(M68K)
2079 #define __A_MAGIC_SET__
2081 internal_a
.magic
= LYNXCOFFMAGIC
;
2083 #endif /* M68 || WE32K || M68K */
2086 #define __A_MAGIC_SET__
2087 internal_a
.magic
= ZMAGIC
;
2090 #define __A_MAGIC_SET__
2091 internal_a
.magic
= PPCMAGIC
;
2094 #define __A_MAGIC_SET__
2096 internal_a
.magic
= LYNXCOFFMAGIC
;
2098 internal_a
.magic
= ZMAGIC
;
2103 #define __A_MAGIC_SET__
2105 internal_a
.magic
= LYNXCOFFMAGIC
;
2110 #define __A_MAGIC_SET__
2111 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2112 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2113 RS6K_AOUTHDR_OMAGIC
;
2116 #ifndef __A_MAGIC_SET__
2117 #include "Your aouthdr magic number is not being set!"
2119 #undef __A_MAGIC_SET__
2123 /* FIXME: Does anybody ever set this to another value? */
2124 internal_a
.vstamp
= 0;
2126 /* Now should write relocs, strings, syms */
2127 obj_sym_filepos (abfd
) = sym_base
;
2129 if (bfd_get_symcount (abfd
) != 0)
2132 #ifndef RS6000COFF_C
2133 if (!coff_add_missing_symbols (abfd
))
2136 if (!coff_renumber_symbols (abfd
, &firstundef
))
2138 coff_mangle_symbols (abfd
);
2139 if (! coff_write_symbols (abfd
))
2141 if (! coff_write_linenumbers (abfd
))
2143 if (! coff_write_relocs (abfd
, firstundef
))
2147 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2148 backend linker, and obj_raw_syment_count is not valid until after
2149 coff_write_symbols is called. */
2150 if (obj_raw_syment_count (abfd
) != 0)
2152 internal_f
.f_symptr
= sym_base
;
2154 /* AIX appears to require that F_RELFLG not be set if there are
2155 local symbols but no relocations. */
2156 internal_f
.f_flags
&=~ F_RELFLG
;
2161 internal_f
.f_symptr
= 0;
2162 internal_f
.f_flags
|= F_LSYMS
;
2167 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2168 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2172 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2173 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2177 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2180 internal_a
.entry
= bfd_get_start_address (abfd
);
2181 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2183 /* now write them */
2184 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2188 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) & buff
);
2189 if (bfd_write ((PTR
) & buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2192 if (abfd
->flags
& EXEC_P
)
2195 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) & buff
);
2196 if (bfd_write ((PTR
) & buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2204 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2209 bfd_size_type count
;
2211 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
2212 coff_compute_section_file_positions (abfd
);
2215 /* If this is a .lib section, bump the vma address so that it
2216 winds up being the number of .lib sections output. This is
2217 right for SVR3.2. Shared libraries should probably get more
2218 generic support. Ian Taylor <ian@cygnus.com>. */
2219 if (strcmp (section
->name
, _LIB
) == 0)
2223 /* Don't write out bss sections - one way to do this is to
2224 see if the filepos has not been set. */
2225 if (section
->filepos
== 0)
2228 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
2233 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
2239 coff_close_and_cleanup (abfd
)
2242 if (!bfd_read_p (abfd
))
2243 switch (abfd
->format
)
2246 if (!_bfd_write_archive_contents (abfd
))
2250 if (!coff_write_object_contents (abfd
))
2254 bfd_set_error (bfd_error_invalid_operation
);
2258 /* We depend on bfd_close to free all the memory on the obstack. */
2259 /* FIXME if bfd_release is not using obstacks! */
2266 buy_and_read (abfd
, where
, seek_direction
, size
)
2272 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
2275 bfd_set_error (bfd_error_no_memory
);
2278 if (bfd_seek (abfd
, where
, seek_direction
) != 0
2279 || bfd_read (area
, 1, size
, abfd
) != size
)
2282 } /* buy_and_read() */
2288 Creating the linenumber table is done by reading in the entire
2289 coff linenumber table, and creating another table for internal use.
2291 A coff linenumber table is structured so that each function
2292 is marked as having a line number of 0. Each line within the
2293 function is an offset from the first line in the function. The
2294 base of the line number information for the table is stored in
2295 the symbol associated with the function.
2297 The information is copied from the external to the internal
2298 table, and each symbol which marks a function is marked by
2301 How does this work ?
2306 coff_slurp_line_table (abfd
, asect
)
2310 LINENO
*native_lineno
;
2311 alent
*lineno_cache
;
2313 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
2315 native_lineno
= (LINENO
*) buy_and_read (abfd
,
2316 asect
->line_filepos
,
2319 asect
->lineno_count
));
2321 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
2322 if (lineno_cache
== NULL
)
2324 bfd_set_error (bfd_error_no_memory
);
2329 unsigned int counter
= 0;
2330 alent
*cache_ptr
= lineno_cache
;
2331 LINENO
*src
= native_lineno
;
2333 while (counter
< asect
->lineno_count
)
2335 struct internal_lineno dst
;
2336 coff_swap_lineno_in (abfd
, src
, &dst
);
2337 cache_ptr
->line_number
= dst
.l_lnno
;
2339 if (cache_ptr
->line_number
== 0)
2341 coff_symbol_type
*sym
=
2342 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
2343 + obj_raw_syments (abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
2344 cache_ptr
->u
.sym
= (asymbol
*) sym
;
2345 sym
->lineno
= cache_ptr
;
2349 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
2350 - bfd_section_vma (abfd
, asect
);
2351 } /* If no linenumber expect a symbol index */
2357 cache_ptr
->line_number
= 0;
2360 asect
->lineno
= lineno_cache
;
2361 /* FIXME, free native_lineno here, or use alloca or something. */
2366 coff_slurp_symbol_table (abfd
)
2369 combined_entry_type
*native_symbols
;
2370 coff_symbol_type
*cached_area
;
2371 unsigned int *table_ptr
;
2373 unsigned int number_of_symbols
= 0;
2375 if (obj_symbols (abfd
))
2378 /* Read in the symbol table */
2379 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
2384 /* Allocate enough room for all the symbols in cached form */
2385 cached_area
= ((coff_symbol_type
*)
2387 (obj_raw_syment_count (abfd
)
2388 * sizeof (coff_symbol_type
))));
2390 if (cached_area
== NULL
)
2392 bfd_set_error (bfd_error_no_memory
);
2395 table_ptr
= ((unsigned int *)
2397 (obj_raw_syment_count (abfd
)
2398 * sizeof (unsigned int))));
2400 if (table_ptr
== NULL
)
2402 bfd_set_error (bfd_error_no_memory
);
2407 coff_symbol_type
*dst
= cached_area
;
2408 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
2409 unsigned int this_index
= 0;
2410 while (this_index
< last_native_index
)
2412 combined_entry_type
*src
= native_symbols
+ this_index
;
2413 table_ptr
[this_index
] = number_of_symbols
;
2414 dst
->symbol
.the_bfd
= abfd
;
2416 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
2417 /* We use the native name field to point to the cached field. */
2418 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
2419 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
2420 src
->u
.syment
.n_scnum
);
2421 dst
->symbol
.flags
= 0;
2422 dst
->done_lineno
= false;
2424 switch (src
->u
.syment
.n_sclass
)
2429 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2430 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2431 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2433 /* Fall through to next case */
2442 /* PE uses storage class 0x68 to denote a section symbol */
2445 if ((src
->u
.syment
.n_scnum
) == 0)
2447 if ((src
->u
.syment
.n_value
) == 0)
2449 dst
->symbol
.section
= bfd_und_section_ptr
;
2450 dst
->symbol
.value
= 0;
2454 dst
->symbol
.section
= bfd_com_section_ptr
;
2455 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2460 /* Base the value as an index from the base of the
2463 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2464 dst
->symbol
.value
= (src
->u
.syment
.n_value
2465 - dst
->symbol
.section
->vma
);
2467 if (ISFCN ((src
->u
.syment
.n_type
)))
2469 /* A function ext does not go at the end of a
2471 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2476 /* A C_HIDEXT symbol is not global. */
2477 if (src
->u
.syment
.n_sclass
== C_HIDEXT
)
2478 dst
->symbol
.flags
= BSF_LOCAL
;
2479 /* A XTY_LD symbol should not go at the end. */
2480 if (src
->u
.syment
.n_numaux
> 0)
2482 combined_entry_type
*auxp
;
2484 auxp
= src
+ src
->u
.syment
.n_numaux
;
2485 if (SMTYP_SMTYP (auxp
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
2486 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
2492 case C_STAT
: /* static */
2494 case C_LEAFSTAT
: /* static leaf procedure */
2496 case C_LABEL
: /* label */
2497 if (src
->u
.syment
.n_scnum
== -2)
2498 dst
->symbol
.flags
= BSF_DEBUGGING
;
2500 dst
->symbol
.flags
= BSF_LOCAL
;
2502 Base the value as an index from the base of the section, if
2505 if (dst
->symbol
.section
)
2506 dst
->symbol
.value
= (src
->u
.syment
.n_value
) -
2507 dst
->symbol
.section
->vma
;
2509 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2512 case C_MOS
: /* member of structure */
2513 case C_EOS
: /* end of structure */
2514 #ifdef NOTDEF /* C_AUTOARG has the same value */
2516 case C_GLBLREG
: /* A29k-specific storage class */
2519 case C_REGPARM
: /* register parameter */
2520 case C_REG
: /* register variable */
2522 case C_AUTOARG
: /* 960-specific storage class */
2524 case C_TPDEF
: /* type definition */
2526 case C_AUTO
: /* automatic variable */
2527 case C_FIELD
: /* bit field */
2528 case C_ENTAG
: /* enumeration tag */
2529 case C_MOE
: /* member of enumeration */
2530 case C_MOU
: /* member of union */
2531 case C_UNTAG
: /* union tag */
2532 dst
->symbol
.flags
= BSF_DEBUGGING
;
2533 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2536 case C_FILE
: /* file name */
2537 case C_STRTAG
: /* structure tag */
2539 case C_BINCL
: /* beginning of include file */
2540 case C_EINCL
: /* ending of include file */
2552 dst
->symbol
.flags
= BSF_DEBUGGING
;
2553 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2558 dst
->symbol
.flags
= BSF_DEBUGGING
;
2559 dst
->symbol
.value
= src
->u
.syment
.n_value
;
2561 /* The value is actually a symbol index. Save a pointer
2562 to the symbol instead of the index. FIXME: This
2563 should use a union. */
2564 src
->u
.syment
.n_value
=
2565 (long) (native_symbols
+ src
->u
.syment
.n_value
);
2570 case C_BLOCK
: /* ".bb" or ".eb" */
2571 case C_FCN
: /* ".bf" or ".ef" */
2572 case C_EFCN
: /* physical end of function */
2573 dst
->symbol
.flags
= BSF_LOCAL
;
2575 Base the value as an index from the base of the section
2577 dst
->symbol
.value
= (src
->u
.syment
.n_value
) - dst
->symbol
.section
->vma
;
2581 case C_EXTDEF
: /* external definition */
2582 case C_ULABEL
: /* undefined label */
2583 case C_USTATIC
: /* undefined static */
2584 #ifndef COFF_WITH_PE
2585 /* C_LINE in regular coff is 0x68. NT has taken over this storage
2586 class to represent a section symbol */
2587 case C_LINE
: /* line # reformatted as symbol table entry */
2589 case C_ALIAS
: /* duplicate tag */
2590 case C_HIDDEN
: /* ext symbol in dmert public lib */
2592 (*_bfd_error_handler
)
2593 ("%s: Unrecognized storage class %d for %s symbol `%s'",
2594 bfd_get_filename (abfd
), src
->u
.syment
.n_sclass
,
2595 dst
->symbol
.section
->name
, dst
->symbol
.name
);
2596 dst
->symbol
.flags
= BSF_DEBUGGING
;
2597 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2601 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2605 dst
->symbol
.udata
.i
= 0;
2606 dst
->lineno
= (alent
*) NULL
;
2607 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
2609 number_of_symbols
++;
2610 } /* walk the native symtab */
2611 } /* bfdize the native symtab */
2613 obj_symbols (abfd
) = cached_area
;
2614 obj_raw_syments (abfd
) = native_symbols
;
2616 bfd_get_symcount (abfd
) = number_of_symbols
;
2617 obj_convert (abfd
) = table_ptr
;
2618 /* Slurp the line tables for each section too */
2624 coff_slurp_line_table (abfd
, p
);
2629 } /* coff_slurp_symbol_table() */
2631 /* Check whether a symbol is globally visible. This is used by the
2632 COFF backend linker code in cofflink.c, since a couple of targets
2633 have globally visible symbols which are not class C_EXT. This
2634 function need not handle the case of n_class == C_EXT. */
2636 #undef OTHER_GLOBAL_CLASS
2639 #define OTHER_GLOBAL_CLASS C_LEAFEXT
2643 #define OTHER_GLOBAL_CLASS C_SECTION
2646 #ifdef OTHER_GLOBAL_CLASS
2649 coff_sym_is_global (abfd
, syment
)
2651 struct internal_syment
*syment
;
2653 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
2658 #undef OTHER_GLOBAL_CLASS
2660 #else /* ! defined (OTHER_GLOBAL_CLASS) */
2662 /* sym_is_global should not be defined if it has nothing to do. */
2664 #define coff_sym_is_global 0
2666 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
2672 Coff relocations are easily transformed into the internal BFD form
2675 Reading a coff relocation table is done in the following stages:
2677 o Read the entire coff relocation table into memory.
2679 o Process each relocation in turn; first swap it from the
2680 external to the internal form.
2682 o Turn the symbol referenced in the relocation's symbol index
2683 into a pointer into the canonical symbol table.
2684 This table is the same as the one returned by a call to
2685 @code{bfd_canonicalize_symtab}. The back end will call that
2686 routine and save the result if a canonicalization hasn't been done.
2688 o The reloc index is turned into a pointer to a howto
2689 structure, in a back end specific way. For instance, the 386
2690 and 960 use the @code{r_type} to directly produce an index
2691 into a howto table vector; the 88k subtracts a number from the
2692 @code{r_type} field and creates an addend field.
2698 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2700 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2701 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2702 coffsym = (obj_symbols (abfd) \
2703 + (cache_ptr->sym_ptr_ptr - symbols)); \
2705 coffsym = coff_symbol_from (abfd, ptr); \
2706 if (coffsym != (coff_symbol_type *) NULL \
2707 && coffsym->native->u.syment.n_scnum == 0) \
2708 cache_ptr->addend = 0; \
2709 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2710 && ptr->section != (asection *) NULL) \
2711 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2713 cache_ptr->addend = 0; \
2718 coff_slurp_reloc_table (abfd
, asect
, symbols
)
2723 RELOC
*native_relocs
;
2724 arelent
*reloc_cache
;
2729 if (asect
->relocation
)
2731 if (asect
->reloc_count
== 0)
2733 if (asect
->flags
& SEC_CONSTRUCTOR
)
2735 if (!coff_slurp_symbol_table (abfd
))
2738 (RELOC
*) buy_and_read (abfd
,
2742 asect
->reloc_count
));
2743 reloc_cache
= (arelent
*)
2744 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
2746 if (reloc_cache
== NULL
)
2748 bfd_set_error (bfd_error_no_memory
);
2753 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2755 #ifdef RELOC_PROCESSING
2756 struct internal_reloc dst
;
2757 struct external_reloc
*src
;
2759 cache_ptr
= reloc_cache
+ idx
;
2760 src
= native_relocs
+ idx
;
2761 coff_swap_reloc_in (abfd
, src
, &dst
);
2763 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
2765 struct internal_reloc dst
;
2767 struct external_reloc
*src
;
2769 cache_ptr
= reloc_cache
+ idx
;
2770 src
= native_relocs
+ idx
;
2772 coff_swap_reloc_in (abfd
, src
, &dst
);
2775 cache_ptr
->address
= dst
.r_vaddr
;
2777 if (dst
.r_symndx
!= -1)
2779 /* @@ Should never be greater than count of symbols! */
2780 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
2782 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[dst
.r_symndx
];
2783 ptr
= *(cache_ptr
->sym_ptr_ptr
);
2787 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
2791 /* The symbols definitions that we have read in have been
2792 relocated as if their sections started at 0. But the offsets
2793 refering to the symbols in the raw data have not been
2794 modified, so we have to have a negative addend to compensate.
2796 Note that symbols which used to be common must be left alone */
2798 /* Calculate any reloc addend by looking at the symbol */
2799 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
2801 cache_ptr
->address
-= asect
->vma
;
2802 /* !! cache_ptr->section = (asection *) NULL;*/
2804 /* Fill in the cache_ptr->howto field from dst.r_type */
2805 RTYPE2HOWTO (cache_ptr
, &dst
);
2810 asect
->relocation
= reloc_cache
;
2814 #ifndef coff_rtype_to_howto
2817 /* Get the howto structure for a reloc. This is only used if the file
2818 including this one defines coff_relocate_section to be
2819 _bfd_coff_generic_relocate_section, so it is OK if it does not
2820 always work. It is the responsibility of the including file to
2821 make sure it is reasonable if it is needed. */
2823 static reloc_howto_type
*coff_rtype_to_howto
2824 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
2825 struct coff_link_hash_entry
*, struct internal_syment
*,
2829 static reloc_howto_type
*
2830 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
2833 struct internal_reloc
*rel
;
2834 struct coff_link_hash_entry
*h
;
2835 struct internal_syment
*sym
;
2840 RTYPE2HOWTO (&genrel
, rel
);
2841 return genrel
.howto
;
2844 #else /* ! defined (RTYPE2HOWTO) */
2846 #define coff_rtype_to_howto NULL
2848 #endif /* ! defined (RTYPE2HOWTO) */
2849 #endif /* ! defined (coff_rtype_to_howto) */
2851 /* This is stupid. This function should be a boolean predicate. */
2853 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
2859 arelent
*tblptr
= section
->relocation
;
2860 unsigned int count
= 0;
2863 if (section
->flags
& SEC_CONSTRUCTOR
)
2865 /* this section has relocs made up by us, they are not in the
2866 file, so take them out of their chain and place them into
2867 the data area provided */
2868 arelent_chain
*chain
= section
->constructor_chain
;
2869 for (count
= 0; count
< section
->reloc_count
; count
++)
2871 *relptr
++ = &chain
->relent
;
2872 chain
= chain
->next
;
2878 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
2881 tblptr
= section
->relocation
;
2883 for (; count
++ < section
->reloc_count
;)
2884 *relptr
++ = tblptr
++;
2889 return section
->reloc_count
;
2894 coff_sym_filepos (abfd
)
2897 return obj_sym_filepos (abfd
);
2901 #ifndef coff_reloc16_estimate
2902 #define coff_reloc16_estimate dummy_reloc16_estimate
2905 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
2907 asection
*input_section
;
2909 unsigned int shrink
;
2910 struct bfd_link_info
*link_info
;
2917 #ifndef coff_reloc16_extra_cases
2918 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
2919 /* This works even if abort is not declared in any header file. */
2921 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
2924 struct bfd_link_info
*link_info
;
2925 struct bfd_link_order
*link_order
;
2928 unsigned int *src_ptr
;
2929 unsigned int *dst_ptr
;
2935 /* If coff_relocate_section is defined, we can use the optimized COFF
2936 backend linker. Otherwise we must continue to use the old linker. */
2937 #ifdef coff_relocate_section
2938 #ifndef coff_bfd_link_hash_table_create
2939 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
2941 #ifndef coff_bfd_link_add_symbols
2942 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
2944 #ifndef coff_bfd_final_link
2945 #define coff_bfd_final_link _bfd_coff_final_link
2947 #else /* ! defined (coff_relocate_section) */
2948 #define coff_relocate_section NULL
2949 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
2950 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
2951 #define coff_bfd_final_link _bfd_generic_final_link
2952 #endif /* ! defined (coff_relocate_section) */
2953 #define coff_bfd_link_split_section _bfd_generic_link_split_section
2955 #ifndef coff_start_final_link
2956 #define coff_start_final_link NULL
2959 #ifndef coff_adjust_symndx
2960 #define coff_adjust_symndx NULL
2963 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
2965 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
2966 coff_swap_aux_out
, coff_swap_sym_out
,
2967 coff_swap_lineno_out
, coff_swap_reloc_out
,
2968 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
2969 coff_swap_scnhdr_out
,
2970 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
2971 #ifdef COFF_LONG_FILENAMES
2976 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
2977 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
2978 coff_mkobject_hook
, styp_to_sec_flags
, coff_set_alignment_hook
,
2979 coff_slurp_symbol_table
, symname_in_debug_hook
, coff_pointerize_aux_hook
,
2980 coff_print_aux
, coff_reloc16_extra_cases
, coff_reloc16_estimate
,
2981 coff_sym_is_global
, coff_compute_section_file_positions
,
2982 coff_start_final_link
, coff_relocate_section
, coff_rtype_to_howto
,
2986 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
2987 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
2988 #define coff_get_section_contents _bfd_generic_get_section_contents
2990 #ifndef coff_bfd_copy_private_symbol_data
2991 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
2994 #ifndef coff_bfd_copy_private_section_data
2995 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
2998 #ifndef coff_bfd_copy_private_bfd_data
2999 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3002 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3003 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3005 #ifndef coff_bfd_print_private_bfd_data
3006 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3009 #ifndef coff_bfd_is_local_label
3010 #define coff_bfd_is_local_label bfd_generic_is_local_label
3012 #ifndef coff_read_minisymbols
3013 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3015 #ifndef coff_minisymbol_to_symbol
3016 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3019 /* The reloc lookup routine must be supplied by each individual COFF
3021 #ifndef coff_bfd_reloc_type_lookup
3022 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3025 #ifndef coff_bfd_get_relocated_section_contents
3026 #define coff_bfd_get_relocated_section_contents \
3027 bfd_generic_get_relocated_section_contents
3029 #ifndef coff_bfd_relax_section
3030 #define coff_bfd_relax_section bfd_generic_relax_section