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;
308 bfd_link_pe_info_dval
*ptr
;
311 if (ptr
&& ptr
->defined
)
317 #include "coffswap.h"
319 /* void warning(); */
322 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
323 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
324 * NOTE: If you add to/change this routine, you should mirror the changes
325 * in styp_to_sec_flags().
328 sec_to_styp_flags (sec_name
, sec_flags
)
329 CONST
char *sec_name
;
334 if (!strcmp (sec_name
, _TEXT
))
336 styp_flags
= STYP_TEXT
;
338 else if (!strcmp (sec_name
, _DATA
))
340 styp_flags
= STYP_DATA
;
343 else if (!strcmp (sec_name
, ".data2"))
345 styp_flags
= STYP_DATA
;
346 #endif /* TWO_DATA_SECS */
348 else if (!strcmp (sec_name
, _BSS
))
350 styp_flags
= STYP_BSS
;
353 else if (!strcmp (sec_name
, _COMMENT
))
355 styp_flags
= STYP_INFO
;
356 #endif /* _COMMENT */
359 else if (!strcmp (sec_name
, _LIB
))
361 styp_flags
= STYP_LIB
;
365 else if (!strcmp (sec_name
, _LIT
))
367 styp_flags
= STYP_LIT
;
370 else if (!strcmp (sec_name
, ".debug"))
373 styp_flags
= STYP_DEBUG
;
375 styp_flags
= STYP_INFO
;
378 else if (!strncmp (sec_name
, ".stab", 5))
380 styp_flags
= STYP_INFO
;
383 else if (!strcmp (sec_name
, ".edata"))
385 styp_flags
= STYP_DATA
;
388 /* Try and figure out what it should be */
389 else if (sec_flags
& SEC_CODE
)
391 styp_flags
= STYP_TEXT
;
393 else if (sec_flags
& SEC_DATA
)
395 styp_flags
= STYP_DATA
;
397 else if (sec_flags
& SEC_READONLY
)
399 #ifdef STYP_LIT /* 29k readonly text/data section */
400 styp_flags
= STYP_LIT
;
402 styp_flags
= STYP_TEXT
;
403 #endif /* STYP_LIT */
405 else if (sec_flags
& SEC_LOAD
)
407 styp_flags
= STYP_TEXT
;
409 else if (sec_flags
& SEC_ALLOC
)
411 styp_flags
= STYP_BSS
;
415 if ((sec_flags
& (SEC_NEVER_LOAD
| SEC_COFF_SHARED_LIBRARY
)) != 0)
416 styp_flags
|= STYP_NOLOAD
;
422 * Return a word with SEC_* flags set to represent the incoming
423 * STYP_* flags (from scnhdr.s_flags). The inverse of this
424 * function is sec_to_styp_flags().
425 * NOTE: If you add to/change this routine, you should mirror the changes
426 * in sec_to_styp_flags().
429 styp_to_sec_flags (abfd
, hdr
, name
)
434 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
435 long styp_flags
= internal_s
->s_flags
;
436 flagword sec_flags
= 0;
439 if (styp_flags
& STYP_NOLOAD
)
441 sec_flags
|= SEC_NEVER_LOAD
;
443 #endif /* STYP_NOLOAD */
445 /* For 386 COFF, at least, an unloadable text or data section is
446 actually a shared library section. */
447 if (styp_flags
& STYP_TEXT
)
449 if (sec_flags
& SEC_NEVER_LOAD
)
450 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
452 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
454 else if (styp_flags
& STYP_DATA
)
456 if (sec_flags
& SEC_NEVER_LOAD
)
457 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
459 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
461 else if (styp_flags
& STYP_BSS
)
463 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
464 if (sec_flags
& SEC_NEVER_LOAD
)
465 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
468 sec_flags
|= SEC_ALLOC
;
470 else if (styp_flags
& STYP_INFO
)
472 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
473 defined. coff_compute_section_file_positions uses
474 COFF_PAGE_SIZE to ensure that the low order bits of the
475 section VMA and the file offset match. If we don't know
476 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
477 and demand page loading of the file will fail. */
478 #ifdef COFF_PAGE_SIZE
479 sec_flags
|= SEC_DEBUGGING
;
482 else if (strcmp (name
, _TEXT
) == 0)
484 if (sec_flags
& SEC_NEVER_LOAD
)
485 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
487 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
489 else if (strcmp (name
, _DATA
) == 0
491 || strcmp (name
, ".data2") == 0
495 if (sec_flags
& SEC_NEVER_LOAD
)
496 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
498 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
500 else if (strcmp (name
, _BSS
) == 0)
502 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
503 if (sec_flags
& SEC_NEVER_LOAD
)
504 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
507 sec_flags
|= SEC_ALLOC
;
509 else if (strcmp (name
, ".debug") == 0
511 || strcmp (name
, _COMMENT
) == 0
513 || strncmp (name
, ".stab", 5) == 0)
515 #ifdef COFF_PAGE_SIZE
516 sec_flags
|= SEC_DEBUGGING
;
520 else if (strcmp (name
, _LIB
) == 0)
524 else if (strcmp (name
, _LIT
) == 0)
526 sec_flags
= SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
;
531 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
534 #ifdef STYP_LIT /* A29k readonly text/data section type */
535 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
537 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
539 #endif /* STYP_LIT */
540 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
541 if (styp_flags
& STYP_OTHER_LOAD
)
543 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
545 #endif /* STYP_SDATA */
550 #define get_index(symbol) ((symbol)->udata.i)
554 bfd_coff_backend_data
558 Special entry points for gdb to swap in coff symbol table parts:
561 . void (*_bfd_coff_swap_aux_in) PARAMS ((
570 . void (*_bfd_coff_swap_sym_in) PARAMS ((
575 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
581 Special entry points for gas to swap out coff parts:
583 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
592 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
597 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
602 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
607 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
612 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
617 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
623 Special entry points for generic COFF routines to call target
624 dependent COFF routines:
626 . unsigned int _bfd_filhsz;
627 . unsigned int _bfd_aoutsz;
628 . unsigned int _bfd_scnhsz;
629 . unsigned int _bfd_symesz;
630 . unsigned int _bfd_auxesz;
631 . unsigned int _bfd_relsz;
632 . unsigned int _bfd_linesz;
633 . boolean _bfd_coff_long_filenames;
634 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
638 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
642 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
646 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
650 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
652 . PTR internal_filehdr));
653 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
655 . PTR internal_filehdr));
656 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
658 . PTR internal_filehdr,
659 . PTR internal_aouthdr));
660 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
662 . PTR internal_scnhdr,
663 . const char *name));
664 . asection *(*_bfd_make_section_hook) PARAMS ((
667 . void (*_bfd_set_alignment_hook) PARAMS ((
670 . PTR internal_scnhdr));
671 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
673 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
675 . struct internal_syment *sym));
676 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
678 . struct bfd_link_info *link_info,
679 . struct bfd_link_order *link_order,
682 . unsigned int *src_ptr,
683 . unsigned int *dst_ptr));
684 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
686 . asection *input_section,
688 . unsigned int shrink,
689 . struct bfd_link_info *link_info));
690 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
692 . struct internal_syment *));
693 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
695 . boolean (*_bfd_coff_relocate_section) PARAMS ((
697 . struct bfd_link_info *info,
699 . asection *input_section,
700 . bfd_byte *contents,
701 . struct internal_reloc *relocs,
702 . struct internal_syment *syms,
703 . asection **sections));
704 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
707 . struct internal_reloc *rel,
708 . struct coff_link_hash_entry *h,
709 . struct internal_syment *sym,
710 . bfd_vma *addendp));
711 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
713 . struct bfd_link_info *info,
716 . struct internal_reloc *reloc,
717 . boolean *adjustedp));
719 .} bfd_coff_backend_data;
721 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
723 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
724 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
726 .#define bfd_coff_swap_sym_in(a,e,i) \
727 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
729 .#define bfd_coff_swap_lineno_in(a,e,i) \
730 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
732 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
733 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
735 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
736 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
738 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
739 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
741 .#define bfd_coff_swap_sym_out(abfd, i,o) \
742 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
744 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
745 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
747 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
748 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
750 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
751 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
753 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
754 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
755 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
756 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
757 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
758 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
759 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
760 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
761 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
762 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
764 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
765 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
767 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
768 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
770 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
771 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
773 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
774 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
776 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
777 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
778 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
779 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
781 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
782 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
784 .#define bfd_coff_make_section_hook(abfd, name)\
785 . ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
787 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
788 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
790 .#define bfd_coff_slurp_symbol_table(abfd)\
791 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
793 .#define bfd_coff_symname_in_debug(abfd, sym)\
794 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
796 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
797 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
798 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
800 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
801 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
802 . (abfd, section, reloc, shrink, link_info))
804 .#define bfd_coff_sym_is_global(abfd, sym)\
805 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
808 .#define bfd_coff_compute_section_file_positions(abfd)\
809 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
812 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
813 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
814 . (obfd, info, ibfd, o, con, rel, isyms, secs))
815 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
816 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
817 . (abfd, sec, rel, h, sym, addendp))
818 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
819 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
820 . (obfd, info, ibfd, sec, rel, adjustedp))
824 /* See whether the magic number matches. */
827 coff_bad_format_hook (abfd
, filehdr
)
831 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
833 if (BADMAG (*internal_f
))
836 /* if the optional header is NULL or not the correct size then
837 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
838 and Intel 960 readwrite headers (I960WRMAGIC) is that the
839 optional header is of a different size.
841 But the mips keeps extra stuff in it's opthdr, so dont check
845 #if defined(M88) || defined(I960)
846 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
854 coff_make_section_hook (abfd
, name
)
859 /* FIXME: This predates the call to bfd_make_section_anyway
860 in make_a_section_from_file, and can probably go away. */
861 /* On SCO a file created by the Microsoft assembler can have two
862 .data sections. We use .data2 for the second one. */
863 if (strcmp (name
, _DATA
) == 0)
864 return bfd_make_section (abfd
, ".data2");
866 return (asection
*) NULL
;
870 initialize a section structure with information peculiar to this
871 particular implementation of coff
875 coff_new_section_hook (abfd
, section
)
879 section
->alignment_power
= COFF_DEFAULT_SECTION_ALIGNMENT_POWER
;
881 /* Allocate aux records for section symbols, to store size and
884 @@ Shouldn't use constant multiplier here! */
885 coffsymbol (section
->symbol
)->native
=
886 (combined_entry_type
*) bfd_zalloc (abfd
,
887 sizeof (combined_entry_type
) * 10);
889 /* The .stab section must be aligned to 2**2 at most, because
890 otherwise there may be gaps in the section which gdb will not
891 know how to interpret. Examining the section name is a hack, but
892 that is also how gdb locates the section. We also align the
893 .stabstr section this way for backward compatibility, although I
894 believe it would work anyhow. */
895 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 2
896 && (strncmp (section
->name
, ".stab", 5) == 0))
897 section
->alignment_power
= 2;
904 /* Set the alignment of a BFD section. */
907 coff_set_alignment_hook (abfd
, section
, scnhdr
)
912 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
915 for (i
= 0; i
< 32; i
++)
916 if ((1 << i
) >= hdr
->s_align
)
918 section
->alignment_power
= i
;
923 #define coff_set_alignment_hook \
924 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
932 coff_data_type
*coff
;
934 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*) bfd_zalloc (abfd
, sizeof (coff_data_type
));
935 if (abfd
->tdata
.coff_obj_data
== 0)
937 bfd_set_error (bfd_error_no_memory
);
940 coff
= coff_data (abfd
);
941 coff
->symbols
= (coff_symbol_type
*) NULL
;
942 coff
->conversion_table
= (unsigned int *) NULL
;
943 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
945 /* make_abs_section(abfd);*/
953 /* Create the COFF backend specific information. */
956 coff_mkobject_hook (abfd
, filehdr
, aouthdr
)
961 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
962 coff_data_type
*coff
;
964 if (coff_mkobject (abfd
) == false)
967 coff
= coff_data (abfd
);
969 coff
->sym_filepos
= internal_f
->f_symptr
;
971 /* These members communicate important constants about the symbol
972 table to GDB's symbol-reading code. These `constants'
973 unfortunately vary among coff implementations... */
974 coff
->local_n_btmask
= N_BTMASK
;
975 coff
->local_n_btshft
= N_BTSHFT
;
976 coff
->local_n_tmask
= N_TMASK
;
977 coff
->local_n_tshift
= N_TSHIFT
;
978 coff
->local_symesz
= SYMESZ
;
979 coff
->local_auxesz
= AUXESZ
;
980 coff
->local_linesz
= LINESZ
;
982 obj_raw_syment_count (abfd
) =
983 obj_conv_table_size (abfd
) =
989 /* Determine the machine architecture and type. FIXME: This is target
990 dependent because the magic numbers are defined in the target
991 dependent header files. But there is no particular need for this.
992 If the magic numbers were moved to a separate file, this function
993 would be target independent and would also be much more successful
994 at linking together COFF files for different architectures. */
997 coff_set_arch_mach_hook (abfd
, filehdr
)
1002 enum bfd_architecture arch
;
1003 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1006 switch (internal_f
->f_magic
)
1011 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
1012 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
1013 arch
= bfd_arch_i386
;
1017 #ifdef A29K_MAGIC_BIG
1018 case A29K_MAGIC_BIG
:
1019 case A29K_MAGIC_LITTLE
:
1020 arch
= bfd_arch_a29k
;
1026 arch
= bfd_arch_arm
;
1033 #ifdef MC68KBCSMAGIC
1036 #ifdef APOLLOM68KMAGIC
1037 case APOLLOM68KMAGIC
:
1039 #ifdef LYNXCOFFMAGIC
1042 arch
= bfd_arch_m68k
;
1050 arch
= bfd_arch_m88k
;
1056 arch
= bfd_arch_z8k
;
1057 switch (internal_f
->f_flags
& F_MACHMASK
)
1060 machine
= bfd_mach_z8001
;
1063 machine
= bfd_mach_z8002
;
1074 arch
= bfd_arch_i960
;
1075 switch (F_I960TYPE
& internal_f
->f_flags
)
1079 machine
= bfd_mach_i960_core
;
1082 machine
= bfd_mach_i960_kb_sb
;
1085 machine
= bfd_mach_i960_mc
;
1088 machine
= bfd_mach_i960_xa
;
1091 machine
= bfd_mach_i960_ca
;
1094 machine
= bfd_mach_i960_ka_sa
;
1096 /* start-sanitize-i960xl */
1098 machine
= bfd_mach_i960_xl
;
1100 /* end-sanitize-i960xl */
1110 arch
= bfd_arch_rs6000
;
1117 arch
= bfd_arch_we32k
;
1124 arch
= bfd_arch_h8300
;
1125 machine
= bfd_mach_h8300
;
1126 /* !! FIXME this probably isn't the right place for this */
1127 abfd
->flags
|= BFD_IS_RELAXABLE
;
1133 arch
= bfd_arch_h8300
;
1134 machine
= bfd_mach_h8300h
;
1135 /* !! FIXME this probably isn't the right place for this */
1136 abfd
->flags
|= BFD_IS_RELAXABLE
;
1140 #ifdef SH_ARCH_MAGIC_BIG
1141 case SH_ARCH_MAGIC_BIG
:
1142 case SH_ARCH_MAGIC_LITTLE
:
1150 arch
= bfd_arch_h8500
;
1157 #ifdef LYNXCOFFMAGIC
1160 arch
= bfd_arch_sparc
;
1165 default: /* Unreadable input file type */
1166 arch
= bfd_arch_obscure
;
1170 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1174 #ifdef SYMNAME_IN_DEBUG
1177 symname_in_debug_hook (abfd
, sym
)
1179 struct internal_syment
*sym
;
1181 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1186 #define symname_in_debug_hook \
1187 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1195 To write relocations, the back end steps though the
1196 canonical relocation table and create an
1197 @code{internal_reloc}. The symbol index to use is removed from
1198 the @code{offset} field in the symbol table supplied. The
1199 address comes directly from the sum of the section base
1200 address and the relocation offset; the type is dug directly
1201 from the howto field. Then the @code{internal_reloc} is
1202 swapped into the shape of an @code{external_reloc} and written
1208 coff_write_relocs (abfd
, first_undef
)
1213 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1216 struct external_reloc dst
;
1218 arelent
**p
= s
->orelocation
;
1219 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1221 for (i
= 0; i
< s
->reloc_count
; i
++)
1223 struct internal_reloc n
;
1225 memset ((PTR
) & n
, 0, sizeof (n
));
1227 /* Now we've renumbered the symbols we know where the
1228 undefined symbols live in the table. Check the reloc
1229 entries for symbols who's output bfd isn't the right one.
1230 This is because the symbol was undefined (which means
1231 that all the pointers are never made to point to the same
1232 place). This is a bad thing,'cause the symbols attached
1233 to the output bfd are indexed, so that the relocation
1234 entries know which symbol index they point to. So we
1235 have to look up the output symbol here. */
1237 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1240 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1241 asymbol
**outsyms
= abfd
->outsymbols
;
1242 for (i
= first_undef
; outsyms
[i
]; i
++)
1244 const char *intable
= outsyms
[i
]->name
;
1245 if (strcmp (intable
, sname
) == 0) {
1246 /* got a hit, so repoint the reloc */
1247 q
->sym_ptr_ptr
= outsyms
+ i
;
1253 n
.r_vaddr
= q
->address
+ s
->vma
;
1256 /* The 29k const/consth reloc pair is a real kludge. The consth
1257 part doesn't have a symbol; it has an offset. So rebuilt
1259 if (q
->howto
->type
== R_IHCONST
)
1260 n
.r_symndx
= q
->addend
;
1265 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1266 /* This is a relocation relative to the absolute symbol. */
1270 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1271 /* Take notice if the symbol reloc points to a symbol
1272 we don't have in our symbol table. What should we
1274 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1279 #ifdef SWAP_OUT_RELOC_OFFSET
1280 n
.r_offset
= q
->addend
;
1284 /* Work out reloc type from what is required */
1285 SELECT_RELOC (n
, q
->howto
);
1287 n
.r_type
= q
->howto
->type
;
1289 coff_swap_reloc_out (abfd
, &n
, &dst
);
1290 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1298 /* Set flags and magic number of a coff file from architecture and machine
1299 type. Result is true if we can represent the arch&type, false if not. */
1302 coff_set_flags (abfd
, magicp
, flagsp
)
1305 unsigned short *flagsp
;
1307 switch (bfd_get_arch (abfd
))
1312 switch (bfd_get_mach (abfd
))
1314 case bfd_mach_z8001
:
1317 case bfd_mach_z8002
:
1331 *magicp
= I960ROMAGIC
;
1333 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1334 I960RWMAGIC); FIXME???
1336 switch (bfd_get_mach (abfd
))
1338 case bfd_mach_i960_core
:
1341 case bfd_mach_i960_kb_sb
:
1344 case bfd_mach_i960_mc
:
1347 case bfd_mach_i960_xa
:
1350 case bfd_mach_i960_ca
:
1353 case bfd_mach_i960_ka_sa
:
1356 /* start-sanitize-i960xl */
1357 case bfd_mach_i960_xl
:
1360 /* end-sanitize-i960xl */
1376 *magicp
= I386MAGIC
;
1378 /* Just overwrite the usual value if we're doing Lynx. */
1379 *magicp
= LYNXCOFFMAGIC
;
1386 #ifdef APOLLOM68KMAGIC
1387 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1389 *magicp
= MC68MAGIC
;
1392 /* Just overwrite the usual value if we're doing Lynx. */
1393 *magicp
= LYNXCOFFMAGIC
;
1401 *magicp
= MC88OMAGIC
;
1406 case bfd_arch_h8300
:
1407 switch (bfd_get_mach (abfd
))
1409 case bfd_mach_h8300
:
1410 *magicp
= H8300MAGIC
;
1412 case bfd_mach_h8300h
:
1413 *magicp
= H8300HMAGIC
;
1419 #ifdef SH_ARCH_MAGIC_BIG
1421 if (abfd
->xvec
->byteorder_big_p
)
1422 *magicp
= SH_ARCH_MAGIC_BIG
;
1424 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1430 case bfd_arch_sparc
:
1431 *magicp
= SPARCMAGIC
;
1433 /* Just overwrite the usual value if we're doing Lynx. */
1434 *magicp
= LYNXCOFFMAGIC
;
1441 case bfd_arch_h8500
:
1442 *magicp
= H8500MAGIC
;
1446 #ifdef A29K_MAGIC_BIG
1448 if (abfd
->xvec
->byteorder_big_p
)
1449 *magicp
= A29K_MAGIC_BIG
;
1451 *magicp
= A29K_MAGIC_LITTLE
;
1457 case bfd_arch_we32k
:
1458 *magicp
= WE32KMAGIC
;
1464 case bfd_arch_rs6000
:
1465 case bfd_arch_powerpc
:
1466 *magicp
= U802TOCMAGIC
;
1471 default: /* Unknown architecture */
1472 /* return false; -- fall through to "return false" below, to avoid
1473 "statement never reached" errors on the one below. */
1482 coff_set_arch_mach (abfd
, arch
, machine
)
1484 enum bfd_architecture arch
;
1485 unsigned long machine
;
1488 unsigned short dummy2
;
1490 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
1493 if (arch
!= bfd_arch_unknown
&&
1494 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
1495 return false; /* We can't represent this type */
1497 return true; /* We're easy ... */
1501 /* Calculate the file position for each section. */
1504 coff_compute_section_file_positions (abfd
)
1508 asection
*previous
= (asection
*) NULL
;
1509 file_ptr sofar
= FILHSZ
;
1516 #ifdef COFF_IMAGE_WITH_PE
1517 page_size
= pe_value (&(coff_data (abfd
)->link_info
->pe_info
->file_alignment
),
1518 PE_DEF_FILE_ALIGNMENT
);
1520 page_size
= COFF_PAGE_SIZE
;
1523 if (bfd_get_start_address (abfd
))
1525 /* A start address may have been added to the original file. In this
1526 case it will need an optional header to record it. */
1527 abfd
->flags
|= EXEC_P
;
1530 if (abfd
->flags
& EXEC_P
)
1533 sofar
+= abfd
->section_count
* SCNHSZ
;
1534 for (current
= abfd
->sections
, count
= 1;
1535 current
!= (asection
*) NULL
;
1536 current
= current
->next
, ++count
)
1538 current
->target_index
= count
;
1540 /* Only deal with sections which have contents */
1541 if (!(current
->flags
& SEC_HAS_CONTENTS
))
1545 /* Do not include the .junk section. This is where we collect section
1546 data which we don't need. This is mainly the MS .debug$ data which
1547 stores codeview debug data. */
1548 if (strcmp (current
->name
, ".junk") == 0)
1554 /* Align the sections in the file to the same boundary on
1555 which they are aligned in virtual memory. I960 doesn't
1556 do this (FIXME) so we can stay in sync with Intel. 960
1557 doesn't yet page from files... */
1560 /* make sure this section is aligned on the right boundary - by
1561 padding the previous section up if necessary */
1564 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1565 if (previous
!= (asection
*) NULL
)
1567 previous
->_raw_size
+= sofar
- old_sofar
;
1573 /* In demand paged files the low order bits of the file offset
1574 must match the low order bits of the virtual address. */
1575 if ((abfd
->flags
& D_PAGED
) != 0
1576 && (current
->flags
& SEC_ALLOC
) != 0)
1577 sofar
+= (current
->vma
- sofar
) % page_size
;
1579 current
->filepos
= sofar
;
1581 sofar
+= current
->_raw_size
;
1583 /* make sure that this section is of the right size too */
1585 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1586 current
->_raw_size
+= sofar
- old_sofar
;
1590 /* Force .lib sections to start at zero. The vma is then
1591 incremented in coff_set_section_contents. This is right for
1593 if (strcmp (current
->name
, _LIB
) == 0)
1594 bfd_set_section_vma (abfd
, current
, 0);
1599 #ifdef COFF_IMAGE_WITH_PE
1600 /* Normally, the starting location for the symbol table will be at the end
1601 of the last section. However, when dealing with NT, the last section
1602 must be as long as its size rounded up to the next page (0x1000). */
1603 sofar
= (sofar
+ page_size
- 1) & -page_size
;
1606 previous
->_raw_size
= (previous
->_raw_size
+ page_size
-1) & -page_size
;
1609 obj_relocbase (abfd
) = sofar
;
1610 abfd
->output_has_begun
= true;
1614 #ifndef RS6000COFF_C
1616 /* If .file, .text, .data, .bss symbols are missing, add them. */
1617 /* @@ Should we only be adding missing symbols, or overriding the aux
1618 values for existing section symbols? */
1620 coff_add_missing_symbols (abfd
)
1623 unsigned int nsyms
= bfd_get_symcount (abfd
);
1624 asymbol
**sympp
= abfd
->outsymbols
;
1627 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
1629 for (i
= 0; i
< nsyms
; i
++)
1631 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
1635 /* only do this if there is a coff representation of the input
1637 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
1642 name
= csym
->symbol
.name
;
1645 if (!strcmp (name
, _TEXT
))
1648 else if (!strcmp (name
, ".wtext"))
1651 else if (!strcmp (name
, _DATA
))
1653 else if (!strcmp (name
, _BSS
))
1657 /* Now i == bfd_get_symcount (abfd). */
1658 /* @@ For now, don't deal with .file symbol. */
1661 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
1663 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
1664 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
1667 bfd_set_error (bfd_error_no_memory
);
1670 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
1673 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1677 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
1679 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
1681 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
1682 BFD_ASSERT (i
== nsyms
);
1683 bfd_set_symtab (abfd
, sympp2
, nsyms
);
1687 #endif /* ! defined (RS6000COFF_C) */
1690 static void add_data_entry (abfd
, aout
, idx
, name
, base
)
1692 struct internal_aouthdr
*aout
;
1697 asection
*sec
= bfd_get_section_by_name (abfd
, name
);
1699 /* add import directory information if it exists */
1702 aout
->pe
->DataDirectory
[idx
].VirtualAddress
= sec
->lma
- base
;
1703 aout
->pe
->DataDirectory
[idx
].Size
= sec
->_raw_size
;
1704 sec
->flags
|= SEC_DATA
;
1710 fill_pe_header_info (abfd
, internal_f
, internal_a
)
1712 struct internal_filehdr
*internal_f
;
1713 struct internal_aouthdr
*internal_a
;
1715 /* assign other filehdr fields for DOS header and NT signature */
1720 bfd_link_pe_info
*pe_info
= coff_data (abfd
)->link_info
->pe_info
;
1722 internal_f
->f_timdat
= time (0);
1724 if (pe_value (&pe_info
->dll
, 0))
1725 internal_f
->f_flags
|= F_DLL
;
1728 if (bfd_get_section_by_name (abfd
, ".reloc"))
1729 internal_f
->f_flags
&= ~F_RELFLG
;
1732 memset (internal_f
->pe
, 0, sizeof (struct internal_extra_pe_filehdr
));
1733 memset (internal_a
->pe
, 0, sizeof (struct internal_extra_pe_aouthdr
));
1736 ib
= internal_a
->pe
->ImageBase
= pe_value (&pe_info
->image_base
, NT_EXE_IMAGE_BASE
);
1738 if (internal_a
->tsize
)
1739 internal_a
->text_start
-= ib
;
1740 if (internal_a
->dsize
)
1741 internal_a
->data_start
-= ib
;
1742 if (internal_a
->entry
)
1743 internal_a
->entry
-= ib
;
1746 sa
= internal_a
->pe
->SectionAlignment
= pe_value (&pe_info
->section_alignment
,
1747 NT_SECTION_ALIGNMENT
);
1749 fa
= internal_a
->pe
->FileAlignment
= pe_value (&pe_info
->file_alignment
,
1752 #define FA(x) (((x) + fa -1 ) & (- fa))
1753 #define SA(x) (((x) + sa -1 ) & (- sa))
1755 /* We like to have the sizes aligned */
1757 internal_a
->bsize
= FA (internal_a
->bsize
);
1759 internal_f
->pe
->e_magic
= DOSMAGIC
;
1760 internal_f
->pe
->e_cblp
= 0x90;
1761 internal_f
->pe
->e_cp
= 0x3;
1762 internal_f
->pe
->e_crlc
= 0x0;
1763 internal_f
->pe
->e_cparhdr
= 0x4;
1764 internal_f
->pe
->e_minalloc
= 0x0;
1765 internal_f
->pe
->e_maxalloc
= 0xffff;
1766 internal_f
->pe
->e_ss
= 0x0;
1767 internal_f
->pe
->e_sp
= 0xb8;
1768 internal_f
->pe
->e_csum
= 0x0;
1769 internal_f
->pe
->e_ip
= 0x0;
1770 internal_f
->pe
->e_cs
= 0x0;
1771 internal_f
->pe
->e_lfarlc
= 0x40;
1772 internal_f
->pe
->e_ovno
= 0x0;
1775 for (idx
=0; idx
< 4; idx
++)
1776 internal_f
->pe
->e_res
[idx
] = 0x0;
1778 internal_f
->pe
->e_oemid
= 0x0;
1779 internal_f
->pe
->e_oeminfo
= 0x0;
1782 for (idx
=0; idx
< 10; idx
++)
1783 internal_f
->pe
->e_res2
[idx
] = 0x0;
1785 internal_f
->pe
->e_lfanew
= 0x80;
1787 /* this next collection of data are mostly just characters. It appears
1788 to be constant within the headers put on NT exes */
1789 internal_f
->pe
->dos_message
[0] = 0x0eba1f0e;
1790 internal_f
->pe
->dos_message
[1] = 0xcd09b400;
1791 internal_f
->pe
->dos_message
[2] = 0x4c01b821;
1792 internal_f
->pe
->dos_message
[3] = 0x685421cd;
1793 internal_f
->pe
->dos_message
[4] = 0x70207369;
1794 internal_f
->pe
->dos_message
[5] = 0x72676f72;
1795 internal_f
->pe
->dos_message
[6] = 0x63206d61;
1796 internal_f
->pe
->dos_message
[7] = 0x6f6e6e61;
1797 internal_f
->pe
->dos_message
[8] = 0x65622074;
1798 internal_f
->pe
->dos_message
[9] = 0x6e757220;
1799 internal_f
->pe
->dos_message
[10] = 0x206e6920;
1800 internal_f
->pe
->dos_message
[11] = 0x20534f44;
1801 internal_f
->pe
->dos_message
[12] = 0x65646f6d;
1802 internal_f
->pe
->dos_message
[13] = 0x0a0d0d2e;
1803 internal_f
->pe
->dos_message
[14] = 0x24;
1804 internal_f
->pe
->dos_message
[15] = 0x0;
1805 internal_f
->pe
->nt_signature
= NT_SIGNATURE
;
1808 /* write all of the other optional header data */
1810 internal_a
->pe
->MajorOperatingSystemVersion
=
1811 pe_value (&pe_info
->major_os_version
, 1);
1813 internal_a
->pe
->MinorOperatingSystemVersion
=
1814 pe_value (&pe_info
->minor_os_version
, 0);
1816 internal_a
->pe
->MajorImageVersion
=
1817 pe_value (&pe_info
->major_image_version
, 1);
1819 internal_a
->pe
->MinorImageVersion
=
1820 pe_value (&pe_info
->minor_image_version
, 0);
1823 internal_a
->pe
->MajorSubsystemVersion
=
1824 pe_value (&pe_info
->major_subsystem_version
, 3);
1827 internal_a
->pe
->MinorSubsystemVersion
=
1828 pe_value (&pe_info
->minor_subsystem_version
, 10);
1830 internal_a
->pe
->Subsystem
=
1831 pe_value (&pe_info
->subsystem
, BFD_PE_CONSOLE
);
1833 /* Virtual start address, take virtual start address of last section,
1834 add its physical size and round up the next page (NT_SECTION_ALIGNMENT).
1835 An assumption has been made that the sections stored in the abfd
1836 structure are in order and that I have successfully saved the last
1837 section's address and size. */
1841 /* The headers go up to where the first section starts. */
1843 internal_a
->pe
->SizeOfHeaders
= abfd
->sections
->filepos
;
1844 internal_a
->pe
->CheckSum
= 0;
1845 internal_a
->pe
->DllCharacteristics
= 0;
1847 internal_a
->pe
->SizeOfStackReserve
= pe_value (&pe_info
->stack_reserve
,
1849 internal_a
->pe
->SizeOfStackCommit
= pe_value (&pe_info
->stack_commit
,
1852 internal_a
->pe
->SizeOfHeapReserve
= pe_value (&pe_info
->heap_reserve
,
1854 internal_a
->pe
->SizeOfHeapCommit
= pe_value (&pe_info
->heap_commit
,
1857 internal_a
->pe
->LoaderFlags
= 0;
1858 internal_a
->pe
->NumberOfRvaAndSizes
= IMAGE_NUMBEROF_DIRECTORY_ENTRIES
; /* 0x10 */
1860 /* first null out all data directory entries .. */
1861 memset (internal_a
->pe
->DataDirectory
, sizeof (internal_a
->pe
->DataDirectory
), 0);
1863 add_data_entry (abfd
, internal_a
, 0, ".edata", ib
);
1864 add_data_entry (abfd
, internal_a
, 1, ".idata", ib
);
1865 add_data_entry (abfd
, internal_a
, 2, ".rsrc" ,ib
);
1866 add_data_entry (abfd
, internal_a
, 5, ".reloc", ib
);
1870 bfd_vma isize
= SA(abfd
->sections
->filepos
);
1873 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1875 int rounded
= FA(sec
->_raw_size
);
1876 if (sec
->flags
& SEC_DATA
)
1878 if (sec
->flags
& SEC_CODE
)
1880 isize
+= SA(rounded
);
1883 internal_a
->dsize
= dsize
;
1884 internal_a
->tsize
= tsize
;
1885 internal_a
->pe
->SizeOfImage
= isize
;
1894 coff_write_object_contents (abfd
)
1898 boolean hasrelocs
= false;
1899 boolean haslinno
= false;
1900 file_ptr reloc_base
;
1901 file_ptr lineno_base
;
1903 unsigned long reloc_size
= 0;
1904 unsigned long lnno_size
= 0;
1905 asection
*text_sec
= NULL
;
1906 asection
*data_sec
= NULL
;
1907 asection
*bss_sec
= NULL
;
1909 struct internal_filehdr internal_f
;
1910 struct internal_aouthdr internal_a
;
1912 #ifdef COFF_IMAGE_WITH_PE
1913 struct internal_extra_pe_aouthdr extra_a
;
1914 struct internal_extra_pe_filehdr extra_f
;
1915 bfd_link_pe_info defs
;
1916 struct bfd_link_info dummy_info
;
1917 struct bfd_link_info
*info
;
1918 struct bfd_link_pe_info
*pe_info
;
1920 if (coff_data (abfd
)->link_info
)
1921 info
=coff_data (abfd
)->link_info
;
1924 coff_data (abfd
)->link_info
= info
= &dummy_info
;
1927 pe_info
= (struct bfd_link_pe_info
*)(info
->pe_info
);
1931 /* Just use sensible defaults */
1932 memset (&defs
, 0, sizeof (defs
));
1933 coff_data (abfd
)->link_info
->pe_info
= &defs
;
1937 bfd_set_error (bfd_error_system_call
);
1939 if (abfd
->output_has_begun
== false)
1940 coff_compute_section_file_positions (abfd
);
1942 reloc_base
= obj_relocbase (abfd
);
1944 /* Make a pass through the symbol table to count line number entries and
1945 put them into the correct asections */
1947 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
1949 /* Work out the size of the reloc and linno areas */
1951 for (current
= abfd
->sections
; current
!= NULL
; current
=
1953 reloc_size
+= current
->reloc_count
* RELSZ
;
1955 lineno_base
= reloc_base
+ reloc_size
;
1956 sym_base
= lineno_base
+ lnno_size
;
1958 /* Indicate in each section->line_filepos its actual file address */
1959 for (current
= abfd
->sections
; current
!= NULL
; current
=
1962 if (current
->lineno_count
)
1964 current
->line_filepos
= lineno_base
;
1965 current
->moving_line_filepos
= lineno_base
;
1966 lineno_base
+= current
->lineno_count
* LINESZ
;
1970 current
->line_filepos
= 0;
1972 if (current
->reloc_count
)
1974 current
->rel_filepos
= reloc_base
;
1975 reloc_base
+= current
->reloc_count
* RELSZ
;
1979 current
->rel_filepos
= 0;
1983 /* Write section headers to the file. */
1984 internal_f
.f_nscns
= 0;
1987 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1988 (FILHSZ
+ AOUTSZ
) : FILHSZ
),
1992 for (current
= abfd
->sections
;
1994 current
= current
->next
)
1996 struct internal_scnhdr section
;
1999 /* Do not include the .junk section. This is where we collect section
2000 data which we don't need. This is mainly the MS .debug$ data which
2001 stores codeview debug data. */
2002 if (strcmp (current
->name
, ".junk") == 0)
2007 internal_f
.f_nscns
++;
2008 strncpy (&(section
.s_name
[0]), current
->name
, 8);
2010 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2011 Ian Taylor <ian@cygnus.com>. */
2012 if (strcmp (current
->name
, _LIB
) == 0)
2013 section
.s_vaddr
= 0;
2016 section
.s_vaddr
= current
->lma
;
2017 section
.s_paddr
= current
->lma
;
2018 section
.s_size
= current
->_raw_size
;
2021 If this section has no size or is unloadable then the scnptr
2024 if (current
->_raw_size
== 0 ||
2025 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2027 section
.s_scnptr
= 0;
2031 section
.s_scnptr
= current
->filepos
;
2033 section
.s_relptr
= current
->rel_filepos
;
2034 section
.s_lnnoptr
= current
->line_filepos
;
2035 section
.s_nreloc
= current
->reloc_count
;
2036 section
.s_nlnno
= current
->lineno_count
;
2037 if (current
->reloc_count
!= 0)
2039 if (current
->lineno_count
!= 0)
2042 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
2044 if (!strcmp (current
->name
, _TEXT
))
2048 else if (!strcmp (current
->name
, _DATA
))
2051 #ifdef TWO_DATA_SECS
2053 else if (!strcmp (current
->name
, ".data2"))
2056 #endif /* TWO_DATA_SECS */
2058 else if (!strcmp (current
->name
, _BSS
))
2064 section
.s_align
= (current
->alignment_power
2065 ? 1 << current
->alignment_power
2070 #ifdef COFF_IMAGE_WITH_PE
2071 /* suppress output of the sections if they are null. ld includes
2072 the bss and data sections even if there is no size assigned
2073 to them. NT loader doesn't like it if these section headers are
2074 included if the sections themselves are not needed */
2075 if (section
.s_size
== 0)
2076 internal_f
.f_nscns
--;
2081 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
2082 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2089 /* OK, now set up the filehdr... */
2091 /* Don't include the internal abs section in the section count */
2094 We will NOT put a fucking timestamp in the header here. Every time you
2095 put it back, I will come in and take it out again. I'm sorry. This
2096 field does not belong here. We fill it with a 0 so it compares the
2097 same but is not a reasonable time. -- gnu@cygnus.com
2100 internal_f
.f_flags
= 0;
2102 if (abfd
->flags
& EXEC_P
)
2103 internal_f
.f_opthdr
= AOUTSZ
;
2105 internal_f
.f_opthdr
= 0;
2108 internal_f
.f_flags
|= F_RELFLG
;
2110 internal_f
.f_flags
|= F_LNNO
;
2111 if (abfd
->flags
& EXEC_P
)
2112 internal_f
.f_flags
|= F_EXEC
;
2114 if (!abfd
->xvec
->byteorder_big_p
)
2115 internal_f
.f_flags
|= F_AR32WR
;
2117 internal_f
.f_flags
|= F_AR32W
;
2120 FIXME, should do something about the other byte orders and
2124 memset (&internal_a
, 0, sizeof internal_a
);
2126 /* Set up architecture-dependent stuff */
2129 unsigned int magic
= 0;
2130 unsigned short flags
= 0;
2131 coff_set_flags (abfd
, &magic
, &flags
);
2132 internal_f
.f_magic
= magic
;
2133 internal_f
.f_flags
|= flags
;
2134 /* ...and the "opt"hdr... */
2137 #ifdef ULTRA3 /* NYU's machine */
2138 /* FIXME: This is a bogus check. I really want to see if there
2139 * is a .shbss or a .shdata section, if so then set the magic
2140 * number to indicate a shared data executable.
2142 if (internal_f
.f_nscns
>= 7)
2143 internal_a
.magic
= SHMAGIC
; /* Shared magic */
2146 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
2147 #define __A_MAGIC_SET__
2150 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
2151 #define __A_MAGIC_SET__
2154 #define __A_MAGIC_SET__
2155 internal_a
.magic
= PAGEMAGICBCS
;
2159 #define __A_MAGIC_SET__
2160 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2163 #if defined(M68) || defined(WE32K) || defined(M68K)
2164 #define __A_MAGIC_SET__
2166 internal_a
.magic
= LYNXCOFFMAGIC
;
2168 #endif /* M68 || WE32K || M68K */
2171 #define __A_MAGIC_SET__
2172 internal_a
.magic
= ZMAGIC
;
2175 #define __A_MAGIC_SET__
2177 internal_a
.magic
= LYNXCOFFMAGIC
;
2179 internal_a
.magic
= ZMAGIC
;
2184 #define __A_MAGIC_SET__
2186 internal_a
.magic
= LYNXCOFFMAGIC
;
2191 #define __A_MAGIC_SET__
2192 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2193 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2194 RS6K_AOUTHDR_OMAGIC
;
2197 #ifndef __A_MAGIC_SET__
2198 #include "Your aouthdr magic number is not being set!"
2200 #undef __A_MAGIC_SET__
2203 /* Now should write relocs, strings, syms */
2204 obj_sym_filepos (abfd
) = sym_base
;
2206 if (bfd_get_symcount (abfd
) != 0)
2209 #ifndef RS6000COFF_C
2210 if (!coff_add_missing_symbols (abfd
))
2213 if (!coff_renumber_symbols (abfd
, &firstundef
))
2215 coff_mangle_symbols (abfd
);
2216 if (! coff_write_symbols (abfd
))
2218 if (! coff_write_linenumbers (abfd
))
2220 if (! coff_write_relocs (abfd
, firstundef
))
2224 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2225 backend linker, and obj_raw_syment_count is not valid until after
2226 coff_write_symbols is called. */
2227 if (obj_raw_syment_count (abfd
) != 0)
2228 internal_f
.f_symptr
= sym_base
;
2231 internal_f
.f_symptr
= 0;
2232 internal_f
.f_flags
|= F_LSYMS
;
2237 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2238 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2242 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2243 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2247 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2250 internal_a
.entry
= bfd_get_start_address (abfd
);
2251 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2255 #ifdef COFF_IMAGE_WITH_PE
2257 internal_f
.pe
= & extra_f
;
2258 internal_a
.pe
= & extra_a
;
2260 fill_pe_header_info (abfd
, &internal_f
, &internal_a
);
2263 /* now write them */
2264 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2268 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) & buff
);
2269 if (bfd_write ((PTR
) & buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2272 if (abfd
->flags
& EXEC_P
)
2275 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) & buff
);
2276 if (bfd_write ((PTR
) & buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2284 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2289 bfd_size_type count
;
2291 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
2292 coff_compute_section_file_positions (abfd
);
2295 /* If this is a .lib section, bump the vma address so that it
2296 winds up being the number of .lib sections output. This is
2297 right for SVR3.2. Shared libraries should probably get more
2298 generic support. Ian Taylor <ian@cygnus.com>. */
2299 if (strcmp (section
->name
, _LIB
) == 0)
2303 /* Don't write out bss sections - one way to do this is to
2304 see if the filepos has not been set. */
2305 if (section
->filepos
== 0)
2308 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
2313 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
2319 coff_close_and_cleanup (abfd
)
2322 if (!bfd_read_p (abfd
))
2323 switch (abfd
->format
)
2326 if (!_bfd_write_archive_contents (abfd
))
2330 if (!coff_write_object_contents (abfd
))
2334 bfd_set_error (bfd_error_invalid_operation
);
2338 /* We depend on bfd_close to free all the memory on the obstack. */
2339 /* FIXME if bfd_release is not using obstacks! */
2346 buy_and_read (abfd
, where
, seek_direction
, size
)
2352 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
2355 bfd_set_error (bfd_error_no_memory
);
2358 if (bfd_seek (abfd
, where
, seek_direction
) != 0
2359 || bfd_read (area
, 1, size
, abfd
) != size
)
2362 } /* buy_and_read() */
2368 Creating the linenumber table is done by reading in the entire
2369 coff linenumber table, and creating another table for internal use.
2371 A coff linenumber table is structured so that each function
2372 is marked as having a line number of 0. Each line within the
2373 function is an offset from the first line in the function. The
2374 base of the line number information for the table is stored in
2375 the symbol associated with the function.
2377 The information is copied from the external to the internal
2378 table, and each symbol which marks a function is marked by
2381 How does this work ?
2386 coff_slurp_line_table (abfd
, asect
)
2390 LINENO
*native_lineno
;
2391 alent
*lineno_cache
;
2393 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
2395 native_lineno
= (LINENO
*) buy_and_read (abfd
,
2396 asect
->line_filepos
,
2399 asect
->lineno_count
));
2401 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
2402 if (lineno_cache
== NULL
)
2404 bfd_set_error (bfd_error_no_memory
);
2409 unsigned int counter
= 0;
2410 alent
*cache_ptr
= lineno_cache
;
2411 LINENO
*src
= native_lineno
;
2413 while (counter
< asect
->lineno_count
)
2415 struct internal_lineno dst
;
2416 coff_swap_lineno_in (abfd
, src
, &dst
);
2417 cache_ptr
->line_number
= dst
.l_lnno
;
2419 if (cache_ptr
->line_number
== 0)
2421 coff_symbol_type
*sym
=
2422 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
2423 + obj_raw_syments (abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
2424 cache_ptr
->u
.sym
= (asymbol
*) sym
;
2425 sym
->lineno
= cache_ptr
;
2429 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
2430 - bfd_section_vma (abfd
, asect
);
2431 } /* If no linenumber expect a symbol index */
2437 cache_ptr
->line_number
= 0;
2440 asect
->lineno
= lineno_cache
;
2441 /* FIXME, free native_lineno here, or use alloca or something. */
2446 coff_slurp_symbol_table (abfd
)
2449 combined_entry_type
*native_symbols
;
2450 coff_symbol_type
*cached_area
;
2451 unsigned int *table_ptr
;
2453 unsigned int number_of_symbols
= 0;
2455 if (obj_symbols (abfd
))
2458 /* Read in the symbol table */
2459 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
2464 /* Allocate enough room for all the symbols in cached form */
2465 cached_area
= ((coff_symbol_type
*)
2467 (obj_raw_syment_count (abfd
)
2468 * sizeof (coff_symbol_type
))));
2470 if (cached_area
== NULL
)
2472 bfd_set_error (bfd_error_no_memory
);
2475 table_ptr
= ((unsigned int *)
2477 (obj_raw_syment_count (abfd
)
2478 * sizeof (unsigned int))));
2480 if (table_ptr
== NULL
)
2482 bfd_set_error (bfd_error_no_memory
);
2487 coff_symbol_type
*dst
= cached_area
;
2488 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
2489 unsigned int this_index
= 0;
2490 while (this_index
< last_native_index
)
2492 combined_entry_type
*src
= native_symbols
+ this_index
;
2493 table_ptr
[this_index
] = number_of_symbols
;
2494 dst
->symbol
.the_bfd
= abfd
;
2496 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
2497 /* We use the native name field to point to the cached field. */
2498 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
2499 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
2500 src
->u
.syment
.n_scnum
);
2501 dst
->symbol
.flags
= 0;
2502 dst
->done_lineno
= false;
2504 switch (src
->u
.syment
.n_sclass
)
2509 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2510 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2511 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2513 /* Fall through to next case */
2522 /* PE uses storage class 0x68 to denote a section symbol */
2525 if ((src
->u
.syment
.n_scnum
) == 0)
2527 if ((src
->u
.syment
.n_value
) == 0)
2529 dst
->symbol
.section
= bfd_und_section_ptr
;
2530 dst
->symbol
.value
= 0;
2534 dst
->symbol
.section
= bfd_com_section_ptr
;
2535 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2541 Base the value as an index from the base of the
2545 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2546 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2548 if (ISFCN ((src
->u
.syment
.n_type
)))
2551 A function ext does not go at the end of a file
2553 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2558 /* If this symbol has a csect aux of type LD, the scnlen field
2559 is actually the index of the containing csect symbol. We
2560 need to pointerize it. */
2561 if (src
->u
.syment
.n_numaux
> 0)
2563 combined_entry_type
*aux
;
2565 aux
= src
+ src
->u
.syment
.n_numaux
- 1;
2566 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
2568 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
2569 native_symbols
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
2570 aux
->fix_scnlen
= 1;
2577 case C_STAT
: /* static */
2579 case C_LEAFSTAT
: /* static leaf procedure */
2581 case C_LABEL
: /* label */
2582 if (src
->u
.syment
.n_scnum
== -2)
2583 dst
->symbol
.flags
= BSF_DEBUGGING
;
2585 dst
->symbol
.flags
= BSF_LOCAL
;
2587 Base the value as an index from the base of the section, if
2590 if (dst
->symbol
.section
)
2591 dst
->symbol
.value
= (src
->u
.syment
.n_value
) -
2592 dst
->symbol
.section
->vma
;
2594 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2597 case C_MOS
: /* member of structure */
2598 case C_EOS
: /* end of structure */
2599 #ifdef NOTDEF /* C_AUTOARG has the same value */
2601 case C_GLBLREG
: /* A29k-specific storage class */
2604 case C_REGPARM
: /* register parameter */
2605 case C_REG
: /* register variable */
2607 case C_AUTOARG
: /* 960-specific storage class */
2609 case C_TPDEF
: /* type definition */
2611 case C_AUTO
: /* automatic variable */
2612 case C_FIELD
: /* bit field */
2613 case C_ENTAG
: /* enumeration tag */
2614 case C_MOE
: /* member of enumeration */
2615 case C_MOU
: /* member of union */
2616 case C_UNTAG
: /* union tag */
2617 dst
->symbol
.flags
= BSF_DEBUGGING
;
2618 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2621 case C_FILE
: /* file name */
2622 case C_STRTAG
: /* structure tag */
2624 case C_BINCL
: /* beginning of include file */
2625 case C_EINCL
: /* ending of include file */
2637 dst
->symbol
.flags
= BSF_DEBUGGING
;
2638 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2643 dst
->symbol
.flags
= BSF_DEBUGGING
;
2644 dst
->symbol
.value
= src
->u
.syment
.n_value
;
2646 /* The value is actually a symbol index. Save a pointer to
2647 the symbol instead of the index. FIXME: This should use a
2649 src
->u
.syment
.n_value
=
2650 (long) (native_symbols
+ src
->u
.syment
.n_value
);
2655 case C_BLOCK
: /* ".bb" or ".eb" */
2656 case C_FCN
: /* ".bf" or ".ef" */
2657 case C_EFCN
: /* physical end of function */
2658 dst
->symbol
.flags
= BSF_LOCAL
;
2660 Base the value as an index from the base of the section
2662 dst
->symbol
.value
= (src
->u
.syment
.n_value
) - dst
->symbol
.section
->vma
;
2666 case C_EXTDEF
: /* external definition */
2667 case C_ULABEL
: /* undefined label */
2668 case C_USTATIC
: /* undefined static */
2669 #ifndef COFF_WITH_PE
2670 /* C_LINE in regular coff is 0x68. NT has taken over this storage
2671 class to represent a section symbol */
2672 case C_LINE
: /* line # reformatted as symbol table entry */
2674 case C_ALIAS
: /* duplicate tag */
2675 case C_HIDDEN
: /* ext symbol in dmert public lib */
2678 fprintf (stderr
, "Unrecognized storage class %d (assuming debugging)\n for %s symbol `%s'\n",
2679 src
->u
.syment
.n_sclass
, dst
->symbol
.section
->name
,
2682 dst
->symbol
.flags
= BSF_DEBUGGING
;
2683 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2687 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2691 dst
->symbol
.udata
.i
= 0;
2692 dst
->lineno
= (alent
*) NULL
;
2693 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
2695 number_of_symbols
++;
2696 } /* walk the native symtab */
2697 } /* bfdize the native symtab */
2699 obj_symbols (abfd
) = cached_area
;
2700 obj_raw_syments (abfd
) = native_symbols
;
2702 bfd_get_symcount (abfd
) = number_of_symbols
;
2703 obj_convert (abfd
) = table_ptr
;
2704 /* Slurp the line tables for each section too */
2710 coff_slurp_line_table (abfd
, p
);
2715 } /* coff_slurp_symbol_table() */
2717 /* Check whether a symbol is globally visible. This is used by the
2718 COFF backend linker code in cofflink.c, since a couple of targets
2719 have globally visible symbols which are not class C_EXT. This
2720 function need not handle the case of n_class == C_EXT. */
2722 #undef OTHER_GLOBAL_CLASS
2725 #define OTHER_GLOBAL_CLASS C_LEAFEXT
2729 #define OTHER_GLOBAL_CLASS C_HIDEXT
2733 #define OTHER_GLOBAL_CLASS C_SECTION
2736 #ifdef OTHER_GLOBAL_CLASS
2739 coff_sym_is_global (abfd
, syment
)
2741 struct internal_syment
*syment
;
2743 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
2748 #undef OTHER_GLOBAL_CLASS
2750 #else /* ! defined (OTHER_GLOBAL_CLASS) */
2752 /* sym_is_global should not be defined if it has nothing to do. */
2754 #define coff_sym_is_global 0
2756 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
2762 Coff relocations are easily transformed into the internal BFD form
2765 Reading a coff relocation table is done in the following stages:
2767 o Read the entire coff relocation table into memory.
2769 o Process each relocation in turn; first swap it from the
2770 external to the internal form.
2772 o Turn the symbol referenced in the relocation's symbol index
2773 into a pointer into the canonical symbol table.
2774 This table is the same as the one returned by a call to
2775 @code{bfd_canonicalize_symtab}. The back end will call that
2776 routine and save the result if a canonicalization hasn't been done.
2778 o The reloc index is turned into a pointer to a howto
2779 structure, in a back end specific way. For instance, the 386
2780 and 960 use the @code{r_type} to directly produce an index
2781 into a howto table vector; the 88k subtracts a number from the
2782 @code{r_type} field and creates an addend field.
2788 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2790 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2791 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2792 coffsym = (obj_symbols (abfd) \
2793 + (cache_ptr->sym_ptr_ptr - symbols)); \
2795 coffsym = coff_symbol_from (abfd, ptr); \
2796 if (coffsym != (coff_symbol_type *) NULL \
2797 && coffsym->native->u.syment.n_scnum == 0) \
2798 cache_ptr->addend = 0; \
2799 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2800 && ptr->section != (asection *) NULL) \
2801 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2803 cache_ptr->addend = 0; \
2808 coff_slurp_reloc_table (abfd
, asect
, symbols
)
2813 RELOC
*native_relocs
;
2814 arelent
*reloc_cache
;
2819 if (asect
->relocation
)
2821 if (asect
->reloc_count
== 0)
2823 if (asect
->flags
& SEC_CONSTRUCTOR
)
2825 if (!coff_slurp_symbol_table (abfd
))
2828 (RELOC
*) buy_and_read (abfd
,
2832 asect
->reloc_count
));
2833 reloc_cache
= (arelent
*)
2834 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
2836 if (reloc_cache
== NULL
)
2838 bfd_set_error (bfd_error_no_memory
);
2843 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2845 #ifdef RELOC_PROCESSING
2846 struct internal_reloc dst
;
2847 struct external_reloc
*src
;
2849 cache_ptr
= reloc_cache
+ idx
;
2850 src
= native_relocs
+ idx
;
2851 coff_swap_reloc_in (abfd
, src
, &dst
);
2853 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
2855 struct internal_reloc dst
;
2857 struct external_reloc
*src
;
2859 cache_ptr
= reloc_cache
+ idx
;
2860 src
= native_relocs
+ idx
;
2862 coff_swap_reloc_in (abfd
, src
, &dst
);
2865 cache_ptr
->address
= dst
.r_vaddr
;
2867 if (dst
.r_symndx
!= -1)
2869 /* @@ Should never be greater than count of symbols! */
2870 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
2872 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[dst
.r_symndx
];
2873 ptr
= *(cache_ptr
->sym_ptr_ptr
);
2877 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
2881 /* The symbols definitions that we have read in have been
2882 relocated as if their sections started at 0. But the offsets
2883 refering to the symbols in the raw data have not been
2884 modified, so we have to have a negative addend to compensate.
2886 Note that symbols which used to be common must be left alone */
2888 /* Calculate any reloc addend by looking at the symbol */
2889 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
2891 cache_ptr
->address
-= asect
->vma
;
2892 /* !! cache_ptr->section = (asection *) NULL;*/
2894 /* Fill in the cache_ptr->howto field from dst.r_type */
2895 RTYPE2HOWTO (cache_ptr
, &dst
);
2900 asect
->relocation
= reloc_cache
;
2904 #ifndef coff_rtype_to_howto
2907 /* Get the howto structure for a reloc. This is only used if the file
2908 including this one defines coff_relocate_section to be
2909 _bfd_coff_generic_relocate_section, so it is OK if it does not
2910 always work. It is the responsibility of the including file to
2911 make sure it is reasonable if it is needed. */
2913 static reloc_howto_type
*coff_rtype_to_howto
2914 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
2915 struct coff_link_hash_entry
*, struct internal_syment
*,
2919 static reloc_howto_type
*
2920 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
2923 struct internal_reloc
*rel
;
2924 struct coff_link_hash_entry
*h
;
2925 struct internal_syment
*sym
;
2930 RTYPE2HOWTO (&genrel
, rel
);
2931 return genrel
.howto
;
2934 #else /* ! defined (RTYPE2HOWTO) */
2936 #define coff_rtype_to_howto NULL
2938 #endif /* ! defined (RTYPE2HOWTO) */
2939 #endif /* ! defined (coff_rtype_to_howto) */
2941 /* This is stupid. This function should be a boolean predicate. */
2943 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
2949 arelent
*tblptr
= section
->relocation
;
2950 unsigned int count
= 0;
2953 if (section
->flags
& SEC_CONSTRUCTOR
)
2955 /* this section has relocs made up by us, they are not in the
2956 file, so take them out of their chain and place them into
2957 the data area provided */
2958 arelent_chain
*chain
= section
->constructor_chain
;
2959 for (count
= 0; count
< section
->reloc_count
; count
++)
2961 *relptr
++ = &chain
->relent
;
2962 chain
= chain
->next
;
2968 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
2971 tblptr
= section
->relocation
;
2973 for (; count
++ < section
->reloc_count
;)
2974 *relptr
++ = tblptr
++;
2979 return section
->reloc_count
;
2984 coff_sym_filepos (abfd
)
2987 return obj_sym_filepos (abfd
);
2991 #ifndef coff_reloc16_estimate
2992 #define coff_reloc16_estimate dummy_reloc16_estimate
2995 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
2997 asection
*input_section
;
2999 unsigned int shrink
;
3000 struct bfd_link_info
*link_info
;
3007 #ifndef coff_reloc16_extra_cases
3008 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3009 /* This works even if abort is not declared in any header file. */
3011 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
3014 struct bfd_link_info
*link_info
;
3015 struct bfd_link_order
*link_order
;
3018 unsigned int *src_ptr
;
3019 unsigned int *dst_ptr
;
3021 fprintf (stderr
, "%s\n", reloc
->howto
->name
);
3026 /* If coff_relocate_section is defined, we can use the optimized COFF
3027 backend linker. Otherwise we must continue to use the old linker. */
3028 #ifdef coff_relocate_section
3029 #ifndef coff_bfd_link_hash_table_create
3030 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3032 #ifndef coff_bfd_link_add_symbols
3033 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3035 #ifndef coff_bfd_final_link
3036 #define coff_bfd_final_link _bfd_coff_final_link
3038 #else /* ! defined (coff_relocate_section) */
3039 #define coff_relocate_section NULL
3040 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3041 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3042 #define coff_bfd_final_link _bfd_generic_final_link
3043 #endif /* ! defined (coff_relocate_section) */
3044 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3046 #ifndef coff_adjust_symndx
3047 #define coff_adjust_symndx NULL
3050 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
3052 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
3053 coff_swap_aux_out
, coff_swap_sym_out
,
3054 coff_swap_lineno_out
, coff_swap_reloc_out
,
3055 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
3056 coff_swap_scnhdr_out
,
3057 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
3058 #ifdef COFF_LONG_FILENAMES
3063 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
3064 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
3065 coff_mkobject_hook
, styp_to_sec_flags
, coff_make_section_hook
,
3066 coff_set_alignment_hook
, coff_slurp_symbol_table
, symname_in_debug_hook
,
3067 coff_reloc16_extra_cases
, coff_reloc16_estimate
,
3068 coff_sym_is_global
, coff_compute_section_file_positions
,
3069 coff_relocate_section
, coff_rtype_to_howto
, coff_adjust_symndx
3072 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3073 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3074 #define coff_get_section_contents _bfd_generic_get_section_contents
3076 #define coff_bfd_copy_private_symbol_data \
3077 _bfd_generic_bfd_copy_private_symbol_data
3078 #define coff_bfd_copy_private_section_data \
3079 _bfd_generic_bfd_copy_private_section_data
3080 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3081 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3082 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3084 #ifndef coff_bfd_is_local_label
3085 #define coff_bfd_is_local_label bfd_generic_is_local_label
3087 #ifndef coff_read_minisymbols
3088 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3090 #ifndef coff_minisymbol_to_symbol
3091 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3094 /* The reloc lookup routine must be supplied by each individual COFF
3096 #ifndef coff_bfd_reloc_type_lookup
3097 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3100 #ifndef coff_bfd_get_relocated_section_contents
3101 #define coff_bfd_get_relocated_section_contents \
3102 bfd_generic_get_relocated_section_contents
3104 #ifndef coff_bfd_relax_section
3105 #define coff_bfd_relax_section bfd_generic_relax_section