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 . {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the
272 . index into the line number entries. Set by
273 . coff_slurp_symbol_table. *}
274 .unsigned int fix_line : 1;
276 . {* The container for the symbol structure as read and translated
280 . union internal_auxent auxent;
281 . struct internal_syment syment;
283 .} combined_entry_type;
286 .{* Each canonical asymbol really looks like this: *}
288 .typedef struct coff_symbol_struct
290 . {* The actual symbol which the rest of BFD works with *}
293 . {* A pointer to the hidden information for this symbol *}
294 .combined_entry_type *native;
296 . {* A pointer to the linenumber information for this symbol *}
297 .struct lineno_cache_entry *lineno;
299 . {* Have the line numbers been relocated yet ? *}
300 .boolean done_lineno;
309 #include "coffswap.h"
313 /* void warning(); */
316 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
317 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
318 * NOTE: If you add to/change this routine, you should mirror the changes
319 * in styp_to_sec_flags().
322 sec_to_styp_flags (sec_name
, sec_flags
)
323 CONST
char *sec_name
;
328 if (!strcmp (sec_name
, _TEXT
))
330 styp_flags
= STYP_TEXT
;
332 else if (!strcmp (sec_name
, _DATA
))
334 styp_flags
= STYP_DATA
;
336 else if (!strcmp (sec_name
, _BSS
))
338 styp_flags
= STYP_BSS
;
341 else if (!strcmp (sec_name
, _COMMENT
))
343 styp_flags
= STYP_INFO
;
344 #endif /* _COMMENT */
347 else if (!strcmp (sec_name
, _LIB
))
349 styp_flags
= STYP_LIB
;
353 else if (!strcmp (sec_name
, _LIT
))
355 styp_flags
= STYP_LIT
;
358 else if (!strcmp (sec_name
, ".debug"))
361 styp_flags
= STYP_DEBUG
;
363 styp_flags
= STYP_INFO
;
366 else if (!strncmp (sec_name
, ".stab", 5))
368 styp_flags
= STYP_INFO
;
371 else if (!strcmp (sec_name
, ".edata"))
373 styp_flags
= STYP_DATA
;
377 else if (!strcmp (sec_name
, _PAD
))
379 styp_flags
= STYP_PAD
;
381 else if (!strcmp (sec_name
, _LOADER
))
383 styp_flags
= STYP_LOADER
;
386 /* Try and figure out what it should be */
387 else if (sec_flags
& SEC_CODE
)
389 styp_flags
= STYP_TEXT
;
391 else if (sec_flags
& SEC_DATA
)
393 styp_flags
= STYP_DATA
;
395 else if (sec_flags
& SEC_READONLY
)
397 #ifdef STYP_LIT /* 29k readonly text/data section */
398 styp_flags
= STYP_LIT
;
400 styp_flags
= STYP_TEXT
;
401 #endif /* STYP_LIT */
403 else if (sec_flags
& SEC_LOAD
)
405 styp_flags
= STYP_TEXT
;
407 else if (sec_flags
& SEC_ALLOC
)
409 styp_flags
= STYP_BSS
;
413 if ((sec_flags
& (SEC_NEVER_LOAD
| SEC_COFF_SHARED_LIBRARY
)) != 0)
414 styp_flags
|= STYP_NOLOAD
;
420 * Return a word with SEC_* flags set to represent the incoming
421 * STYP_* flags (from scnhdr.s_flags). The inverse of this
422 * function is sec_to_styp_flags().
423 * NOTE: If you add to/change this routine, you should mirror the changes
424 * in sec_to_styp_flags().
427 styp_to_sec_flags (abfd
, hdr
, name
)
432 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
433 long styp_flags
= internal_s
->s_flags
;
434 flagword sec_flags
= 0;
437 if (styp_flags
& STYP_NOLOAD
)
439 sec_flags
|= SEC_NEVER_LOAD
;
441 #endif /* STYP_NOLOAD */
443 /* For 386 COFF, at least, an unloadable text or data section is
444 actually a shared library section. */
445 if (styp_flags
& STYP_TEXT
)
447 if (sec_flags
& SEC_NEVER_LOAD
)
448 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
450 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
452 else if (styp_flags
& STYP_DATA
)
454 if (sec_flags
& SEC_NEVER_LOAD
)
455 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
457 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
459 else if (styp_flags
& STYP_BSS
)
461 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
462 if (sec_flags
& SEC_NEVER_LOAD
)
463 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
466 sec_flags
|= SEC_ALLOC
;
468 else if (styp_flags
& STYP_INFO
)
470 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
471 defined. coff_compute_section_file_positions uses
472 COFF_PAGE_SIZE to ensure that the low order bits of the
473 section VMA and the file offset match. If we don't know
474 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
475 and demand page loading of the file will fail. */
476 #ifdef COFF_PAGE_SIZE
477 sec_flags
|= SEC_DEBUGGING
;
480 else if (strcmp (name
, _TEXT
) == 0)
482 if (sec_flags
& SEC_NEVER_LOAD
)
483 sec_flags
|= SEC_CODE
| SEC_COFF_SHARED_LIBRARY
;
485 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
487 else if (strcmp (name
, _DATA
) == 0)
489 if (sec_flags
& SEC_NEVER_LOAD
)
490 sec_flags
|= SEC_DATA
| SEC_COFF_SHARED_LIBRARY
;
492 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
494 else if (strcmp (name
, _BSS
) == 0)
496 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
497 if (sec_flags
& SEC_NEVER_LOAD
)
498 sec_flags
|= SEC_ALLOC
| SEC_COFF_SHARED_LIBRARY
;
501 sec_flags
|= SEC_ALLOC
;
503 else if (strcmp (name
, ".debug") == 0
505 || strcmp (name
, _COMMENT
) == 0
507 || strncmp (name
, ".stab", 5) == 0)
509 #ifdef COFF_PAGE_SIZE
510 sec_flags
|= SEC_DEBUGGING
;
514 else if (strcmp (name
, _LIB
) == 0)
518 else if (strcmp (name
, _LIT
) == 0)
520 sec_flags
= SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
;
525 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
528 #ifdef STYP_LIT /* A29k readonly text/data section type */
529 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
531 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
533 #endif /* STYP_LIT */
534 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
535 if (styp_flags
& STYP_OTHER_LOAD
)
537 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
539 #endif /* STYP_SDATA */
544 #define get_index(symbol) ((symbol)->udata.i)
548 bfd_coff_backend_data
552 Special entry points for gdb to swap in coff symbol table parts:
555 . void (*_bfd_coff_swap_aux_in) PARAMS ((
564 . void (*_bfd_coff_swap_sym_in) PARAMS ((
569 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
575 Special entry points for gas to swap out coff parts:
577 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
586 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
591 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
596 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
601 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
606 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
611 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
617 Special entry points for generic COFF routines to call target
618 dependent COFF routines:
620 . unsigned int _bfd_filhsz;
621 . unsigned int _bfd_aoutsz;
622 . unsigned int _bfd_scnhsz;
623 . unsigned int _bfd_symesz;
624 . unsigned int _bfd_auxesz;
625 . unsigned int _bfd_relsz;
626 . unsigned int _bfd_linesz;
627 . boolean _bfd_coff_long_filenames;
628 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
632 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
636 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
640 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
644 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
646 . PTR internal_filehdr));
647 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
649 . PTR internal_filehdr));
650 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
652 . PTR internal_filehdr,
653 . PTR internal_aouthdr));
654 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
656 . PTR internal_scnhdr,
657 . const char *name));
658 . void (*_bfd_set_alignment_hook) PARAMS ((
661 . PTR internal_scnhdr));
662 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
664 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
666 . struct internal_syment *sym));
667 . boolean (*_bfd_coff_pointerize_aux_hook) PARAMS ((
669 . combined_entry_type *table_base,
670 . combined_entry_type *symbol,
671 . unsigned int indaux,
672 . combined_entry_type *aux));
673 . boolean (*_bfd_coff_print_aux) PARAMS ((
676 . combined_entry_type *table_base,
677 . combined_entry_type *symbol,
678 . combined_entry_type *aux,
679 . unsigned int indaux));
680 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
682 . struct bfd_link_info *link_info,
683 . struct bfd_link_order *link_order,
686 . unsigned int *src_ptr,
687 . unsigned int *dst_ptr));
688 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
690 . asection *input_section,
692 . unsigned int shrink,
693 . struct bfd_link_info *link_info));
694 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
696 . struct internal_syment *));
697 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
699 . boolean (*_bfd_coff_start_final_link) PARAMS ((
701 . struct bfd_link_info *info));
702 . boolean (*_bfd_coff_relocate_section) PARAMS ((
704 . struct bfd_link_info *info,
706 . asection *input_section,
707 . bfd_byte *contents,
708 . struct internal_reloc *relocs,
709 . struct internal_syment *syms,
710 . asection **sections));
711 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
714 . struct internal_reloc *rel,
715 . struct coff_link_hash_entry *h,
716 . struct internal_syment *sym,
717 . bfd_vma *addendp));
718 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
720 . struct bfd_link_info *info,
723 . struct internal_reloc *reloc,
724 . boolean *adjustedp));
726 .} bfd_coff_backend_data;
728 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
730 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
731 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
733 .#define bfd_coff_swap_sym_in(a,e,i) \
734 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
736 .#define bfd_coff_swap_lineno_in(a,e,i) \
737 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
739 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
740 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
742 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
743 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
745 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
746 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
748 .#define bfd_coff_swap_sym_out(abfd, i,o) \
749 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
751 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
752 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
754 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
755 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
757 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
758 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
760 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
761 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
762 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
763 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
764 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
765 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
766 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
767 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
768 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
769 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
771 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
772 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
774 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
775 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
777 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
778 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
780 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
781 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
783 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
784 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
785 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
786 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
788 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
789 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
791 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
792 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
794 .#define bfd_coff_slurp_symbol_table(abfd)\
795 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
797 .#define bfd_coff_symname_in_debug(abfd, sym)\
798 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
800 .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
801 . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
802 . (abfd, file, base, symbol, aux, indaux))
804 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
805 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
806 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
808 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
809 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
810 . (abfd, section, reloc, shrink, link_info))
812 .#define bfd_coff_sym_is_global(abfd, sym)\
813 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
816 .#define bfd_coff_compute_section_file_positions(abfd)\
817 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
820 .#define bfd_coff_start_final_link(obfd, info)\
821 . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
823 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
824 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
825 . (obfd, info, ibfd, o, con, rel, isyms, secs))
826 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
827 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
828 . (abfd, sec, rel, h, sym, addendp))
829 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
830 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
831 . (obfd, info, ibfd, sec, rel, adjustedp))
835 /* See whether the magic number matches. */
838 coff_bad_format_hook (abfd
, filehdr
)
842 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
844 if (BADMAG (*internal_f
))
847 /* if the optional header is NULL or not the correct size then
848 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
849 and Intel 960 readwrite headers (I960WRMAGIC) is that the
850 optional header is of a different size.
852 But the mips keeps extra stuff in it's opthdr, so dont check
856 #if defined(M88) || defined(I960)
857 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
865 initialize a section structure with information peculiar to this
866 particular implementation of coff
870 coff_new_section_hook (abfd
, section
)
874 section
->alignment_power
= COFF_DEFAULT_SECTION_ALIGNMENT_POWER
;
877 if (xcoff_data (abfd
)->text_align_power
!= 0
878 && strcmp (bfd_get_section_name (abfd
, section
), ".text") == 0)
879 section
->alignment_power
= xcoff_data (abfd
)->text_align_power
;
880 if (xcoff_data (abfd
)->data_align_power
!= 0
881 && strcmp (bfd_get_section_name (abfd
, section
), ".data") == 0)
882 section
->alignment_power
= xcoff_data (abfd
)->data_align_power
;
885 /* Allocate aux records for section symbols, to store size and
888 @@ Shouldn't use constant multiplier here! */
889 coffsymbol (section
->symbol
)->native
=
890 (combined_entry_type
*) bfd_zalloc (abfd
,
891 sizeof (combined_entry_type
) * 10);
893 /* The .stab section must be aligned to 2**2 at most, because
894 otherwise there may be gaps in the section which gdb will not
895 know how to interpret. Examining the section name is a hack, but
896 that is also how gdb locates the section.
897 We need to handle the .ctors and .dtors sections similarly, to
898 avoid introducing null words in the tables. */
899 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER
> 2
900 && (strncmp (section
->name
, ".stab", 5) == 0
901 || strcmp (section
->name
, ".ctors") == 0
902 || strcmp (section
->name
, ".dtors") == 0))
903 section
->alignment_power
= 2;
910 /* Set the alignment of a BFD section. */
913 coff_set_alignment_hook (abfd
, section
, scnhdr
)
918 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
921 for (i
= 0; i
< 32; i
++)
922 if ((1 << i
) >= hdr
->s_align
)
924 section
->alignment_power
= i
;
929 #define coff_set_alignment_hook \
930 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
934 #ifndef coff_mkobject
939 coff_data_type
*coff
;
941 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*) bfd_zalloc (abfd
, sizeof (coff_data_type
));
942 if (abfd
->tdata
.coff_obj_data
== 0)
944 bfd_set_error (bfd_error_no_memory
);
947 coff
= coff_data (abfd
);
948 coff
->symbols
= (coff_symbol_type
*) NULL
;
949 coff
->conversion_table
= (unsigned int *) NULL
;
950 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
952 /* make_abs_section(abfd);*/
958 /* Create the COFF backend specific information. */
959 #ifndef coff_mkobject_hook
961 coff_mkobject_hook (abfd
, filehdr
, aouthdr
)
966 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
967 coff_data_type
*coff
;
969 if (coff_mkobject (abfd
) == false)
972 coff
= coff_data (abfd
);
974 coff
->sym_filepos
= internal_f
->f_symptr
;
976 /* These members communicate important constants about the symbol
977 table to GDB's symbol-reading code. These `constants'
978 unfortunately vary among coff implementations... */
979 coff
->local_n_btmask
= N_BTMASK
;
980 coff
->local_n_btshft
= N_BTSHFT
;
981 coff
->local_n_tmask
= N_TMASK
;
982 coff
->local_n_tshift
= N_TSHIFT
;
983 coff
->local_symesz
= SYMESZ
;
984 coff
->local_auxesz
= AUXESZ
;
985 coff
->local_linesz
= LINESZ
;
987 obj_raw_syment_count (abfd
) =
988 obj_conv_table_size (abfd
) =
992 if ((internal_f
->f_flags
& F_SHROBJ
) != 0)
993 abfd
->flags
|= DYNAMIC
;
994 if (aouthdr
!= NULL
&& internal_f
->f_opthdr
>= AOUTSZ
)
996 struct internal_aouthdr
*internal_a
=
997 (struct internal_aouthdr
*) aouthdr
;
998 struct xcoff_tdata
*xcoff
;
1000 xcoff
= xcoff_data (abfd
);
1001 xcoff
->toc
= internal_a
->o_toc
;
1002 xcoff
->text_align_power
= internal_a
->o_algntext
;
1003 xcoff
->data_align_power
= internal_a
->o_algndata
;
1004 xcoff
->modtype
= internal_a
->o_modtype
;
1005 xcoff
->cputype
= internal_a
->o_cputype
;
1006 xcoff
->maxdata
= internal_a
->o_maxdata
;
1007 xcoff
->maxstack
= internal_a
->o_maxstack
;
1015 /* Determine the machine architecture and type. FIXME: This is target
1016 dependent because the magic numbers are defined in the target
1017 dependent header files. But there is no particular need for this.
1018 If the magic numbers were moved to a separate file, this function
1019 would be target independent and would also be much more successful
1020 at linking together COFF files for different architectures. */
1023 coff_set_arch_mach_hook (abfd
, filehdr
)
1028 enum bfd_architecture arch
;
1029 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1032 switch (internal_f
->f_magic
)
1036 arch
= bfd_arch_powerpc
;
1037 machine
= 0; /* what does this mean? (krk) */
1043 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
1044 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
1045 arch
= bfd_arch_i386
;
1049 #ifdef A29K_MAGIC_BIG
1050 case A29K_MAGIC_BIG
:
1051 case A29K_MAGIC_LITTLE
:
1052 arch
= bfd_arch_a29k
;
1058 arch
= bfd_arch_arm
;
1065 #ifdef MC68KBCSMAGIC
1068 #ifdef APOLLOM68KMAGIC
1069 case APOLLOM68KMAGIC
:
1071 #ifdef LYNXCOFFMAGIC
1074 arch
= bfd_arch_m68k
;
1082 arch
= bfd_arch_m88k
;
1088 arch
= bfd_arch_z8k
;
1089 switch (internal_f
->f_flags
& F_MACHMASK
)
1092 machine
= bfd_mach_z8001
;
1095 machine
= bfd_mach_z8002
;
1106 arch
= bfd_arch_i960
;
1107 switch (F_I960TYPE
& internal_f
->f_flags
)
1111 machine
= bfd_mach_i960_core
;
1114 machine
= bfd_mach_i960_kb_sb
;
1117 machine
= bfd_mach_i960_mc
;
1120 machine
= bfd_mach_i960_xa
;
1123 machine
= bfd_mach_i960_ca
;
1126 machine
= bfd_mach_i960_ka_sa
;
1128 /* start-sanitize-i960xl */
1130 machine
= bfd_mach_i960_xl
;
1132 /* end-sanitize-i960xl */
1145 if (xcoff_data (abfd
)->cputype
!= -1)
1146 cputype
= xcoff_data (abfd
)->cputype
& 0xff;
1149 /* We did not get a value from the a.out header. If the
1150 file has not been stripped, we may be able to get the
1151 architecture information from the first symbol, if it
1152 is a .file symbol. */
1153 if (obj_raw_syment_count (abfd
) == 0)
1157 bfd_byte buf
[SYMESZ
];
1158 struct internal_syment sym
;
1160 if (bfd_seek (abfd
, obj_sym_filepos (abfd
), SEEK_SET
) != 0
1161 || bfd_read (buf
, 1, SYMESZ
, abfd
) != SYMESZ
)
1163 coff_swap_sym_in (abfd
, (PTR
) buf
, (PTR
) &sym
);
1164 if (sym
.n_sclass
== C_FILE
)
1165 cputype
= sym
.n_type
& 0xff;
1171 /* FIXME: We don't handle all cases here. */
1177 /* PowerPC Macs use the same magic numbers as RS/6000
1178 (because that's how they were bootstrapped originally),
1179 but they are always PowerPC architecture. */
1180 arch
= bfd_arch_powerpc
;
1183 arch
= bfd_arch_rs6000
;
1185 #endif /* POWERMAC */
1189 arch
= bfd_arch_powerpc
;
1192 case 2: /* 64 bit PowerPC */
1193 arch
= bfd_arch_powerpc
;
1197 arch
= bfd_arch_powerpc
;
1201 arch
= bfd_arch_rs6000
;
1211 arch
= bfd_arch_we32k
;
1218 arch
= bfd_arch_h8300
;
1219 machine
= bfd_mach_h8300
;
1220 /* !! FIXME this probably isn't the right place for this */
1221 abfd
->flags
|= BFD_IS_RELAXABLE
;
1227 arch
= bfd_arch_h8300
;
1228 machine
= bfd_mach_h8300h
;
1229 /* !! FIXME this probably isn't the right place for this */
1230 abfd
->flags
|= BFD_IS_RELAXABLE
;
1234 #ifdef SH_ARCH_MAGIC_BIG
1235 case SH_ARCH_MAGIC_BIG
:
1236 case SH_ARCH_MAGIC_LITTLE
:
1244 arch
= bfd_arch_h8500
;
1251 #ifdef LYNXCOFFMAGIC
1254 arch
= bfd_arch_sparc
;
1259 default: /* Unreadable input file type */
1260 arch
= bfd_arch_obscure
;
1264 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1268 #ifdef SYMNAME_IN_DEBUG
1271 symname_in_debug_hook (abfd
, sym
)
1273 struct internal_syment
*sym
;
1275 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1280 #define symname_in_debug_hook \
1281 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1287 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1289 static boolean coff_pointerize_aux_hook
1290 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1291 unsigned int, combined_entry_type
*));
1295 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1297 combined_entry_type
*table_base
;
1298 combined_entry_type
*symbol
;
1299 unsigned int indaux
;
1300 combined_entry_type
*aux
;
1302 int class = symbol
->u
.syment
.n_sclass
;
1304 if ((class == C_EXT
|| class == C_HIDEXT
)
1305 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1307 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
1309 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
1310 table_base
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
1311 aux
->fix_scnlen
= 1;
1314 /* Return true to indicate that the caller should not do any
1315 further work on this auxent. */
1319 /* Return false to indicate that this auxent should be handled by
1327 /* We don't want to pointerize bal entries. */
1329 static boolean coff_pointerize_aux_hook
1330 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1331 unsigned int, combined_entry_type
*));
1335 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1337 combined_entry_type
*table_base
;
1338 combined_entry_type
*symbol
;
1339 unsigned int indaux
;
1340 combined_entry_type
*aux
;
1342 /* Return true if we don't want to pointerize this aux entry, which
1343 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1344 return indaux
== 1 && symbol
->u
.syment
.n_sclass
== C_LEAFPROC
;
1349 #define coff_pointerize_aux_hook 0
1352 #endif /* ! RS6000COFF_C */
1354 /* Print an aux entry. This returns true if it has printed it. */
1356 static boolean coff_print_aux
1357 PARAMS ((bfd
*, FILE *, combined_entry_type
*, combined_entry_type
*,
1358 combined_entry_type
*, unsigned int));
1361 coff_print_aux (abfd
, file
, table_base
, symbol
, aux
, indaux
)
1364 combined_entry_type
*table_base
;
1365 combined_entry_type
*symbol
;
1366 combined_entry_type
*aux
;
1367 unsigned int indaux
;
1370 if ((symbol
->u
.syment
.n_sclass
== C_EXT
1371 || symbol
->u
.syment
.n_sclass
== C_HIDEXT
)
1372 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1374 /* This is a csect entry. */
1375 fprintf (file
, "AUX ");
1376 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) != XTY_LD
)
1378 BFD_ASSERT (! aux
->fix_scnlen
);
1379 fprintf (file
, "val %5ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1383 fprintf (file
, "indx ");
1384 if (! aux
->fix_scnlen
)
1385 fprintf (file
, "%4ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1387 fprintf (file
, "%4ld",
1388 (long) (aux
->u
.auxent
.x_csect
.x_scnlen
.p
- table_base
));
1391 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1392 aux
->u
.auxent
.x_csect
.x_parmhash
,
1393 (unsigned int) aux
->u
.auxent
.x_csect
.x_snhash
,
1394 SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
),
1395 SMTYP_ALIGN (aux
->u
.auxent
.x_csect
.x_smtyp
),
1396 (unsigned int) aux
->u
.auxent
.x_csect
.x_smclas
,
1397 aux
->u
.auxent
.x_csect
.x_stab
,
1398 (unsigned int) aux
->u
.auxent
.x_csect
.x_snstab
);
1403 /* Return false to indicate that no special action was taken. */
1411 To write relocations, the back end steps though the
1412 canonical relocation table and create an
1413 @code{internal_reloc}. The symbol index to use is removed from
1414 the @code{offset} field in the symbol table supplied. The
1415 address comes directly from the sum of the section base
1416 address and the relocation offset; the type is dug directly
1417 from the howto field. Then the @code{internal_reloc} is
1418 swapped into the shape of an @code{external_reloc} and written
1424 coff_write_relocs (abfd
, first_undef
)
1429 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1432 struct external_reloc dst
;
1434 arelent
**p
= s
->orelocation
;
1435 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1437 for (i
= 0; i
< s
->reloc_count
; i
++)
1439 struct internal_reloc n
;
1441 memset ((PTR
) & n
, 0, sizeof (n
));
1443 /* Now we've renumbered the symbols we know where the
1444 undefined symbols live in the table. Check the reloc
1445 entries for symbols who's output bfd isn't the right one.
1446 This is because the symbol was undefined (which means
1447 that all the pointers are never made to point to the same
1448 place). This is a bad thing,'cause the symbols attached
1449 to the output bfd are indexed, so that the relocation
1450 entries know which symbol index they point to. So we
1451 have to look up the output symbol here. */
1453 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1456 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1457 asymbol
**outsyms
= abfd
->outsymbols
;
1458 for (i
= first_undef
; outsyms
[i
]; i
++)
1460 const char *intable
= outsyms
[i
]->name
;
1461 if (strcmp (intable
, sname
) == 0) {
1462 /* got a hit, so repoint the reloc */
1463 q
->sym_ptr_ptr
= outsyms
+ i
;
1469 n
.r_vaddr
= q
->address
+ s
->vma
;
1472 /* The 29k const/consth reloc pair is a real kludge. The consth
1473 part doesn't have a symbol; it has an offset. So rebuilt
1475 if (q
->howto
->type
== R_IHCONST
)
1476 n
.r_symndx
= q
->addend
;
1481 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1482 /* This is a relocation relative to the absolute symbol. */
1486 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1487 /* Take notice if the symbol reloc points to a symbol
1488 we don't have in our symbol table. What should we
1490 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1495 #ifdef SWAP_OUT_RELOC_OFFSET
1496 n
.r_offset
= q
->addend
;
1500 /* Work out reloc type from what is required */
1501 SELECT_RELOC (n
, q
->howto
);
1503 n
.r_type
= q
->howto
->type
;
1505 coff_swap_reloc_out (abfd
, &n
, &dst
);
1506 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1514 /* Set flags and magic number of a coff file from architecture and machine
1515 type. Result is true if we can represent the arch&type, false if not. */
1518 coff_set_flags (abfd
, magicp
, flagsp
)
1521 unsigned short *flagsp
;
1523 switch (bfd_get_arch (abfd
))
1528 switch (bfd_get_mach (abfd
))
1530 case bfd_mach_z8001
:
1533 case bfd_mach_z8002
:
1547 *magicp
= I960ROMAGIC
;
1549 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1550 I960RWMAGIC); FIXME???
1552 switch (bfd_get_mach (abfd
))
1554 case bfd_mach_i960_core
:
1557 case bfd_mach_i960_kb_sb
:
1560 case bfd_mach_i960_mc
:
1563 case bfd_mach_i960_xa
:
1566 case bfd_mach_i960_ca
:
1569 case bfd_mach_i960_ka_sa
:
1572 /* start-sanitize-i960xl */
1573 case bfd_mach_i960_xl
:
1576 /* end-sanitize-i960xl */
1591 case bfd_arch_powerpc
:
1598 *magicp
= I386MAGIC
;
1600 /* Just overwrite the usual value if we're doing Lynx. */
1601 *magicp
= LYNXCOFFMAGIC
;
1608 #ifdef APOLLOM68KMAGIC
1609 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1611 *magicp
= MC68MAGIC
;
1614 /* Just overwrite the usual value if we're doing Lynx. */
1615 *magicp
= LYNXCOFFMAGIC
;
1623 *magicp
= MC88OMAGIC
;
1628 case bfd_arch_h8300
:
1629 switch (bfd_get_mach (abfd
))
1631 case bfd_mach_h8300
:
1632 *magicp
= H8300MAGIC
;
1634 case bfd_mach_h8300h
:
1635 *magicp
= H8300HMAGIC
;
1641 #ifdef SH_ARCH_MAGIC_BIG
1643 if (abfd
->xvec
->byteorder_big_p
)
1644 *magicp
= SH_ARCH_MAGIC_BIG
;
1646 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1652 case bfd_arch_sparc
:
1653 *magicp
= SPARCMAGIC
;
1655 /* Just overwrite the usual value if we're doing Lynx. */
1656 *magicp
= LYNXCOFFMAGIC
;
1663 case bfd_arch_h8500
:
1664 *magicp
= H8500MAGIC
;
1668 #ifdef A29K_MAGIC_BIG
1670 if (abfd
->xvec
->byteorder_big_p
)
1671 *magicp
= A29K_MAGIC_BIG
;
1673 *magicp
= A29K_MAGIC_LITTLE
;
1679 case bfd_arch_we32k
:
1680 *magicp
= WE32KMAGIC
;
1686 case bfd_arch_rs6000
:
1688 case bfd_arch_powerpc
:
1690 *magicp
= U802TOCMAGIC
;
1695 default: /* Unknown architecture */
1696 /* return false; -- fall through to "return false" below, to avoid
1697 "statement never reached" errors on the one below. */
1706 coff_set_arch_mach (abfd
, arch
, machine
)
1708 enum bfd_architecture arch
;
1709 unsigned long machine
;
1712 unsigned short dummy2
;
1714 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
1717 if (arch
!= bfd_arch_unknown
&&
1718 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
1719 return false; /* We can't represent this type */
1721 return true; /* We're easy ... */
1725 /* Calculate the file position for each section. */
1728 coff_compute_section_file_positions (abfd
)
1732 asection
*previous
= (asection
*) NULL
;
1733 file_ptr sofar
= FILHSZ
;
1741 #ifdef COFF_IMAGE_WITH_PE
1743 if (coff_data (abfd
)->link_info
)
1745 page_size
= pe_data (abfd
)->pe_opthdr
.FileAlignment
;
1748 page_size
= PE_DEF_FILE_ALIGNMENT
;
1749 #elif defined (COFF_PAGE_SIZE)
1750 int page_size
= COFF_PAGE_SIZE
;
1753 if (bfd_get_start_address (abfd
))
1755 /* A start address may have been added to the original file. In this
1756 case it will need an optional header to record it. */
1757 abfd
->flags
|= EXEC_P
;
1760 if (abfd
->flags
& EXEC_P
)
1764 sofar
+= SMALL_AOUTSZ
;
1767 sofar
+= abfd
->section_count
* SCNHSZ
;
1768 for (current
= abfd
->sections
, count
= 1;
1769 current
!= (asection
*) NULL
;
1770 current
= current
->next
, ++count
)
1772 current
->target_index
= count
;
1774 /* Only deal with sections which have contents */
1775 if (!(current
->flags
& SEC_HAS_CONTENTS
))
1779 /* Do not include the .junk section. This is where we collect section
1780 data which we don't need. This is mainly the MS .debug$ data which
1781 stores codeview debug data. */
1782 if (strcmp (current
->name
, ".junk") == 0)
1788 /* Align the sections in the file to the same boundary on
1789 which they are aligned in virtual memory. I960 doesn't
1790 do this (FIXME) so we can stay in sync with Intel. 960
1791 doesn't yet page from files... */
1794 /* make sure this section is aligned on the right boundary - by
1795 padding the previous section up if necessary */
1798 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1799 if (previous
!= (asection
*) NULL
)
1801 previous
->_raw_size
+= sofar
- old_sofar
;
1807 /* In demand paged files the low order bits of the file offset
1808 must match the low order bits of the virtual address. */
1809 #ifdef COFF_PAGE_SIZE
1810 if ((abfd
->flags
& D_PAGED
) != 0
1811 && (current
->flags
& SEC_ALLOC
) != 0)
1812 sofar
+= (current
->vma
- sofar
) % page_size
;
1814 current
->filepos
= sofar
;
1816 #ifdef COFF_IMAGE_WITH_PE
1817 /* With PE we have to pad each section to be a multiple of its page size
1818 too, and remember both sizes. Cooked_size becomes very useful. */
1819 current
->_cooked_size
= current
->_raw_size
;
1820 current
->_raw_size
= (current
->_raw_size
+ page_size
-1) & -page_size
;
1823 sofar
+= current
->_raw_size
;
1826 /* make sure that this section is of the right size too */
1828 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1829 current
->_raw_size
+= sofar
- old_sofar
;
1833 /* Force .lib sections to start at zero. The vma is then
1834 incremented in coff_set_section_contents. This is right for
1836 if (strcmp (current
->name
, _LIB
) == 0)
1837 bfd_set_section_vma (abfd
, current
, 0);
1843 obj_relocbase (abfd
) = sofar
;
1844 abfd
->output_has_begun
= true;
1848 #ifndef RS6000COFF_C
1850 /* If .file, .text, .data, .bss symbols are missing, add them. */
1851 /* @@ Should we only be adding missing symbols, or overriding the aux
1852 values for existing section symbols? */
1854 coff_add_missing_symbols (abfd
)
1857 unsigned int nsyms
= bfd_get_symcount (abfd
);
1858 asymbol
**sympp
= abfd
->outsymbols
;
1861 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
1863 for (i
= 0; i
< nsyms
; i
++)
1865 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
1869 /* only do this if there is a coff representation of the input
1871 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
1876 name
= csym
->symbol
.name
;
1879 if (!strcmp (name
, _TEXT
))
1882 else if (!strcmp (name
, ".wtext"))
1885 else if (!strcmp (name
, _DATA
))
1887 else if (!strcmp (name
, _BSS
))
1891 /* Now i == bfd_get_symcount (abfd). */
1892 /* @@ For now, don't deal with .file symbol. */
1895 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
1897 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
1898 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
1901 bfd_set_error (bfd_error_no_memory
);
1904 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
1907 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1911 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
1913 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
1915 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
1916 BFD_ASSERT (i
== nsyms
);
1917 bfd_set_symtab (abfd
, sympp2
, nsyms
);
1921 #endif /* ! defined (RS6000COFF_C) */
1928 coff_write_object_contents (abfd
)
1932 boolean hasrelocs
= false;
1933 boolean haslinno
= false;
1935 file_ptr reloc_base
;
1936 file_ptr lineno_base
;
1938 unsigned long reloc_size
= 0;
1939 unsigned long lnno_size
= 0;
1940 asection
*text_sec
= NULL
;
1941 asection
*data_sec
= NULL
;
1942 asection
*bss_sec
= NULL
;
1944 struct internal_filehdr internal_f
;
1945 struct internal_aouthdr internal_a
;
1947 bfd_set_error (bfd_error_system_call
);
1949 if (abfd
->output_has_begun
== false)
1950 coff_compute_section_file_positions (abfd
);
1952 reloc_base
= obj_relocbase (abfd
);
1954 /* Make a pass through the symbol table to count line number entries and
1955 put them into the correct asections */
1957 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
1959 /* Work out the size of the reloc and linno areas */
1961 for (current
= abfd
->sections
; current
!= NULL
; current
=
1963 reloc_size
+= current
->reloc_count
* RELSZ
;
1965 lineno_base
= reloc_base
+ reloc_size
;
1966 sym_base
= lineno_base
+ lnno_size
;
1968 /* Indicate in each section->line_filepos its actual file address */
1969 for (current
= abfd
->sections
; current
!= NULL
; current
=
1972 if (current
->lineno_count
)
1974 current
->line_filepos
= lineno_base
;
1975 current
->moving_line_filepos
= lineno_base
;
1976 lineno_base
+= current
->lineno_count
* LINESZ
;
1980 current
->line_filepos
= 0;
1982 if (current
->reloc_count
)
1984 current
->rel_filepos
= reloc_base
;
1985 reloc_base
+= current
->reloc_count
* RELSZ
;
1989 current
->rel_filepos
= 0;
1993 /* Write section headers to the file. */
1994 internal_f
.f_nscns
= 0;
1996 if ((abfd
->flags
& EXEC_P
) != 0)
1997 scn_base
= FILHSZ
+ AOUTSZ
;
2002 scn_base
+= SMALL_AOUTSZ
;
2006 if (bfd_seek (abfd
, scn_base
, SEEK_SET
) != 0)
2009 for (current
= abfd
->sections
;
2011 current
= current
->next
)
2013 struct internal_scnhdr section
;
2016 /* Do not include the .junk section. This is where we collect section
2017 data which we don't need. This is mainly the MS .debug$ data which
2018 stores codeview debug data. */
2019 if (strcmp (current
->name
, ".junk") == 0)
2024 /* If we've got a .reloc section, remember. */
2026 #ifdef COFF_IMAGE_WITH_PE
2027 if (strcmp (current
->name
, ".reloc") == 0)
2029 pe_data (abfd
)->has_reloc_section
= 1;
2034 internal_f
.f_nscns
++;
2035 strncpy (&(section
.s_name
[0]), current
->name
, 8);
2037 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2038 Ian Taylor <ian@cygnus.com>. */
2039 if (strcmp (current
->name
, _LIB
) == 0)
2040 section
.s_vaddr
= 0;
2043 section
.s_vaddr
= current
->lma
;
2044 section
.s_paddr
= current
->lma
;
2045 section
.s_size
= current
->_raw_size
;
2048 section
.s_paddr
= current
->_cooked_size
;
2052 If this section has no size or is unloadable then the scnptr
2055 if (current
->_raw_size
== 0 ||
2056 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2058 section
.s_scnptr
= 0;
2062 section
.s_scnptr
= current
->filepos
;
2064 section
.s_relptr
= current
->rel_filepos
;
2065 section
.s_lnnoptr
= current
->line_filepos
;
2066 section
.s_nreloc
= current
->reloc_count
;
2067 section
.s_nlnno
= current
->lineno_count
;
2068 if (current
->reloc_count
!= 0)
2070 if (current
->lineno_count
!= 0)
2073 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
2075 if (!strcmp (current
->name
, _TEXT
))
2079 else if (!strcmp (current
->name
, _DATA
))
2083 else if (!strcmp (current
->name
, _BSS
))
2089 section
.s_align
= (current
->alignment_power
2090 ? 1 << current
->alignment_power
2095 #ifdef COFF_IMAGE_WITH_PE
2096 /* suppress output of the sections if they are null. ld includes
2097 the bss and data sections even if there is no size assigned
2098 to them. NT loader doesn't like it if these section headers are
2099 included if the sections themselves are not needed */
2100 if (section
.s_size
== 0)
2101 internal_f
.f_nscns
--;
2106 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
2107 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2114 /* OK, now set up the filehdr... */
2116 /* Don't include the internal abs section in the section count */
2119 We will NOT put a fucking timestamp in the header here. Every time you
2120 put it back, I will come in and take it out again. I'm sorry. This
2121 field does not belong here. We fill it with a 0 so it compares the
2122 same but is not a reasonable time. -- gnu@cygnus.com
2124 internal_f
.f_timdat
= 0;
2126 internal_f
.f_flags
= 0;
2128 if (abfd
->flags
& EXEC_P
)
2129 internal_f
.f_opthdr
= AOUTSZ
;
2132 internal_f
.f_opthdr
= 0;
2134 /* XCOFF seems to always write at least a small a.out header. */
2135 internal_f
.f_opthdr
= SMALL_AOUTSZ
;
2140 internal_f
.f_flags
|= F_RELFLG
;
2142 internal_f
.f_flags
|= F_LNNO
;
2143 if (abfd
->flags
& EXEC_P
)
2144 internal_f
.f_flags
|= F_EXEC
;
2146 if (!abfd
->xvec
->byteorder_big_p
)
2147 internal_f
.f_flags
|= F_AR32WR
;
2149 internal_f
.f_flags
|= F_AR32W
;
2152 FIXME, should do something about the other byte orders and
2157 if ((abfd
->flags
& DYNAMIC
) != 0)
2158 internal_f
.f_flags
|= F_SHROBJ
;
2159 if (bfd_get_section_by_name (abfd
, _LOADER
) != NULL
)
2160 internal_f
.f_flags
|= F_DYNLOAD
;
2163 memset (&internal_a
, 0, sizeof internal_a
);
2165 /* Set up architecture-dependent stuff */
2168 unsigned int magic
= 0;
2169 unsigned short flags
= 0;
2170 coff_set_flags (abfd
, &magic
, &flags
);
2171 internal_f
.f_magic
= magic
;
2172 internal_f
.f_flags
|= flags
;
2173 /* ...and the "opt"hdr... */
2176 #ifdef ULTRA3 /* NYU's machine */
2177 /* FIXME: This is a bogus check. I really want to see if there
2178 * is a .shbss or a .shdata section, if so then set the magic
2179 * number to indicate a shared data executable.
2181 if (internal_f
.f_nscns
>= 7)
2182 internal_a
.magic
= SHMAGIC
; /* Shared magic */
2185 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
2186 #define __A_MAGIC_SET__
2189 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
2190 #define __A_MAGIC_SET__
2193 #define __A_MAGIC_SET__
2194 internal_a
.magic
= PAGEMAGICBCS
;
2198 #define __A_MAGIC_SET__
2199 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2202 #if defined(M68) || defined(WE32K) || defined(M68K)
2203 #define __A_MAGIC_SET__
2205 internal_a
.magic
= LYNXCOFFMAGIC
;
2207 #endif /* M68 || WE32K || M68K */
2210 #define __A_MAGIC_SET__
2211 internal_a
.magic
= ZMAGIC
;
2214 #define __A_MAGIC_SET__
2215 internal_a
.magic
= PPCMAGIC
;
2218 #define __A_MAGIC_SET__
2220 internal_a
.magic
= LYNXCOFFMAGIC
;
2222 internal_a
.magic
= ZMAGIC
;
2227 #define __A_MAGIC_SET__
2229 internal_a
.magic
= LYNXCOFFMAGIC
;
2234 #define __A_MAGIC_SET__
2235 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2236 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2237 RS6K_AOUTHDR_OMAGIC
;
2240 #ifndef __A_MAGIC_SET__
2241 #include "Your aouthdr magic number is not being set!"
2243 #undef __A_MAGIC_SET__
2247 /* FIXME: Does anybody ever set this to another value? */
2248 internal_a
.vstamp
= 0;
2250 /* Now should write relocs, strings, syms */
2251 obj_sym_filepos (abfd
) = sym_base
;
2253 if (bfd_get_symcount (abfd
) != 0)
2256 #ifndef RS6000COFF_C
2257 if (!coff_add_missing_symbols (abfd
))
2260 if (!coff_renumber_symbols (abfd
, &firstundef
))
2262 coff_mangle_symbols (abfd
);
2263 if (! coff_write_symbols (abfd
))
2265 if (! coff_write_linenumbers (abfd
))
2267 if (! coff_write_relocs (abfd
, firstundef
))
2271 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2272 backend linker, and obj_raw_syment_count is not valid until after
2273 coff_write_symbols is called. */
2274 if (obj_raw_syment_count (abfd
) != 0)
2276 internal_f
.f_symptr
= sym_base
;
2278 /* AIX appears to require that F_RELFLG not be set if there are
2279 local symbols but no relocations. */
2280 internal_f
.f_flags
&=~ F_RELFLG
;
2285 internal_f
.f_symptr
= 0;
2286 internal_f
.f_flags
|= F_LSYMS
;
2291 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2292 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2296 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2297 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2301 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2304 internal_a
.entry
= bfd_get_start_address (abfd
);
2305 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2308 if ((abfd
->flags
& EXEC_P
) != 0)
2311 asection
*loader_sec
;
2313 entry
= bfd_get_start_address (abfd
);
2314 if (text_sec
!= NULL
2315 && entry
>= text_sec
->vma
2316 && entry
< text_sec
->vma
+ bfd_section_size (abfd
, text_sec
))
2317 internal_a
.o_snentry
= text_sec
->target_index
;
2318 else if (data_sec
!= NULL
2319 && entry
>= data_sec
->vma
2320 && entry
< data_sec
->vma
+ bfd_section_size (abfd
, data_sec
))
2321 internal_a
.o_snentry
= data_sec
->target_index
;
2323 internal_a
.o_snentry
= 0;
2324 if (text_sec
!= NULL
)
2326 internal_a
.o_sntext
= text_sec
->target_index
;
2327 internal_a
.o_algntext
= bfd_get_section_alignment (abfd
, text_sec
);
2331 internal_a
.o_sntext
= 0;
2332 internal_a
.o_algntext
= 0;
2334 if (data_sec
!= NULL
)
2336 internal_a
.o_sndata
= data_sec
->target_index
;
2337 internal_a
.o_algndata
= bfd_get_section_alignment (abfd
, data_sec
);
2341 internal_a
.o_sndata
= 0;
2342 internal_a
.o_algndata
= 0;
2344 loader_sec
= bfd_get_section_by_name (abfd
, ".loader");
2345 if (loader_sec
!= NULL
)
2346 internal_a
.o_snloader
= loader_sec
->target_index
;
2348 internal_a
.o_snloader
= 0;
2349 if (bss_sec
!= NULL
)
2350 internal_a
.o_snbss
= bss_sec
->target_index
;
2352 internal_a
.o_snbss
= 0;
2354 toc
= xcoff_data (abfd
)->toc
;
2355 internal_a
.o_toc
= toc
;
2356 if (text_sec
!= NULL
2357 && toc
>= text_sec
->vma
2358 && toc
< text_sec
->vma
+ bfd_section_size (abfd
, text_sec
))
2359 internal_a
.o_sntoc
= text_sec
->target_index
;
2360 else if (data_sec
!= NULL
2361 && toc
>= data_sec
->vma
2362 && toc
< data_sec
->vma
+ bfd_section_size (abfd
, data_sec
))
2363 internal_a
.o_sntoc
= data_sec
->target_index
;
2365 internal_a
.o_sntoc
= 0;
2367 internal_a
.o_modtype
= xcoff_data (abfd
)->modtype
;
2368 if (xcoff_data (abfd
)->cputype
!= -1)
2369 internal_a
.o_cputype
= xcoff_data (abfd
)->cputype
;
2372 switch (bfd_get_arch (abfd
))
2374 case bfd_arch_rs6000
:
2375 internal_a
.o_cputype
= 4;
2377 case bfd_arch_powerpc
:
2378 if (bfd_get_mach (abfd
) == 0)
2379 internal_a
.o_cputype
= 3;
2381 internal_a
.o_cputype
= 1;
2387 internal_a
.o_maxstack
= xcoff_data (abfd
)->maxstack
;
2388 internal_a
.o_maxdata
= xcoff_data (abfd
)->maxdata
;
2392 /* now write them */
2393 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2397 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) & buff
);
2398 if (bfd_write ((PTR
) & buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2401 if (abfd
->flags
& EXEC_P
)
2404 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) & buff
);
2405 if (bfd_write ((PTR
) & buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2412 /* XCOFF seems to always write at least a small a.out header. */
2413 coff_swap_aouthdr_out (abfd
, (PTR
) &internal_a
, (PTR
) &buff
);
2414 if (bfd_write ((PTR
) &buff
, 1, SMALL_AOUTSZ
, abfd
) != SMALL_AOUTSZ
)
2423 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2428 bfd_size_type count
;
2430 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
2431 coff_compute_section_file_positions (abfd
);
2434 /* If this is a .lib section, bump the vma address so that it
2435 winds up being the number of .lib sections output. This is
2436 right for SVR3.2. Shared libraries should probably get more
2437 generic support. Ian Taylor <ian@cygnus.com>. */
2438 if (strcmp (section
->name
, _LIB
) == 0)
2442 /* Don't write out bss sections - one way to do this is to
2443 see if the filepos has not been set. */
2444 if (section
->filepos
== 0)
2447 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
2452 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
2458 coff_close_and_cleanup (abfd
)
2461 if (!bfd_read_p (abfd
))
2462 switch (abfd
->format
)
2465 if (!_bfd_write_archive_contents (abfd
))
2469 if (!coff_write_object_contents (abfd
))
2473 bfd_set_error (bfd_error_invalid_operation
);
2477 /* We depend on bfd_close to free all the memory on the obstack. */
2478 /* FIXME if bfd_release is not using obstacks! */
2485 buy_and_read (abfd
, where
, seek_direction
, size
)
2491 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
2494 bfd_set_error (bfd_error_no_memory
);
2497 if (bfd_seek (abfd
, where
, seek_direction
) != 0
2498 || bfd_read (area
, 1, size
, abfd
) != size
)
2501 } /* buy_and_read() */
2507 Creating the linenumber table is done by reading in the entire
2508 coff linenumber table, and creating another table for internal use.
2510 A coff linenumber table is structured so that each function
2511 is marked as having a line number of 0. Each line within the
2512 function is an offset from the first line in the function. The
2513 base of the line number information for the table is stored in
2514 the symbol associated with the function.
2516 The information is copied from the external to the internal
2517 table, and each symbol which marks a function is marked by
2520 How does this work ?
2525 coff_slurp_line_table (abfd
, asect
)
2529 LINENO
*native_lineno
;
2530 alent
*lineno_cache
;
2532 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
2534 native_lineno
= (LINENO
*) buy_and_read (abfd
,
2535 asect
->line_filepos
,
2538 asect
->lineno_count
));
2540 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
2541 if (lineno_cache
== NULL
)
2543 bfd_set_error (bfd_error_no_memory
);
2548 unsigned int counter
= 0;
2549 alent
*cache_ptr
= lineno_cache
;
2550 LINENO
*src
= native_lineno
;
2552 while (counter
< asect
->lineno_count
)
2554 struct internal_lineno dst
;
2555 coff_swap_lineno_in (abfd
, src
, &dst
);
2556 cache_ptr
->line_number
= dst
.l_lnno
;
2558 if (cache_ptr
->line_number
== 0)
2560 coff_symbol_type
*sym
=
2561 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
2562 + obj_raw_syments (abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
2563 cache_ptr
->u
.sym
= (asymbol
*) sym
;
2564 if (sym
->lineno
!= NULL
)
2566 (*_bfd_error_handler
)
2567 ("%s: warning: duplicate line number information for `%s'",
2568 bfd_get_filename (abfd
),
2569 bfd_asymbol_name (&sym
->symbol
));
2571 sym
->lineno
= cache_ptr
;
2575 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
2576 - bfd_section_vma (abfd
, asect
);
2577 } /* If no linenumber expect a symbol index */
2583 cache_ptr
->line_number
= 0;
2586 asect
->lineno
= lineno_cache
;
2587 /* FIXME, free native_lineno here, or use alloca or something. */
2592 coff_slurp_symbol_table (abfd
)
2595 combined_entry_type
*native_symbols
;
2596 coff_symbol_type
*cached_area
;
2597 unsigned int *table_ptr
;
2599 unsigned int number_of_symbols
= 0;
2601 if (obj_symbols (abfd
))
2604 /* Read in the symbol table */
2605 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
2610 /* Allocate enough room for all the symbols in cached form */
2611 cached_area
= ((coff_symbol_type
*)
2613 (obj_raw_syment_count (abfd
)
2614 * sizeof (coff_symbol_type
))));
2616 if (cached_area
== NULL
)
2618 bfd_set_error (bfd_error_no_memory
);
2621 table_ptr
= ((unsigned int *)
2623 (obj_raw_syment_count (abfd
)
2624 * sizeof (unsigned int))));
2626 if (table_ptr
== NULL
)
2628 bfd_set_error (bfd_error_no_memory
);
2633 coff_symbol_type
*dst
= cached_area
;
2634 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
2635 unsigned int this_index
= 0;
2636 while (this_index
< last_native_index
)
2638 combined_entry_type
*src
= native_symbols
+ this_index
;
2639 table_ptr
[this_index
] = number_of_symbols
;
2640 dst
->symbol
.the_bfd
= abfd
;
2642 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
2643 /* We use the native name field to point to the cached field. */
2644 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
2645 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
2646 src
->u
.syment
.n_scnum
);
2647 dst
->symbol
.flags
= 0;
2648 dst
->done_lineno
= false;
2650 switch (src
->u
.syment
.n_sclass
)
2655 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2656 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2657 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2659 /* Fall through to next case */
2668 /* PE uses storage class 0x68 to denote a section symbol */
2671 if ((src
->u
.syment
.n_scnum
) == 0)
2673 if ((src
->u
.syment
.n_value
) == 0)
2675 dst
->symbol
.section
= bfd_und_section_ptr
;
2676 dst
->symbol
.value
= 0;
2680 dst
->symbol
.section
= bfd_com_section_ptr
;
2681 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2686 /* Base the value as an index from the base of the
2689 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2690 dst
->symbol
.value
= (src
->u
.syment
.n_value
2691 - dst
->symbol
.section
->vma
);
2693 if (ISFCN ((src
->u
.syment
.n_type
)))
2695 /* A function ext does not go at the end of a
2697 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2702 /* A C_HIDEXT symbol is not global. */
2703 if (src
->u
.syment
.n_sclass
== C_HIDEXT
)
2704 dst
->symbol
.flags
= BSF_LOCAL
;
2705 /* A symbol with a csect entry should not go at the end. */
2706 if (src
->u
.syment
.n_numaux
> 0)
2707 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
2712 case C_STAT
: /* static */
2714 case C_LEAFSTAT
: /* static leaf procedure */
2716 case C_LABEL
: /* label */
2717 if (src
->u
.syment
.n_scnum
== -2)
2718 dst
->symbol
.flags
= BSF_DEBUGGING
;
2720 dst
->symbol
.flags
= BSF_LOCAL
;
2722 Base the value as an index from the base of the section, if
2725 if (dst
->symbol
.section
)
2726 dst
->symbol
.value
= (src
->u
.syment
.n_value
) -
2727 dst
->symbol
.section
->vma
;
2729 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2732 case C_MOS
: /* member of structure */
2733 case C_EOS
: /* end of structure */
2734 #ifdef NOTDEF /* C_AUTOARG has the same value */
2736 case C_GLBLREG
: /* A29k-specific storage class */
2739 case C_REGPARM
: /* register parameter */
2740 case C_REG
: /* register variable */
2742 case C_AUTOARG
: /* 960-specific storage class */
2744 case C_TPDEF
: /* type definition */
2746 case C_AUTO
: /* automatic variable */
2747 case C_FIELD
: /* bit field */
2748 case C_ENTAG
: /* enumeration tag */
2749 case C_MOE
: /* member of enumeration */
2750 case C_MOU
: /* member of union */
2751 case C_UNTAG
: /* union tag */
2752 dst
->symbol
.flags
= BSF_DEBUGGING
;
2753 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2756 case C_FILE
: /* file name */
2757 case C_STRTAG
: /* structure tag */
2770 dst
->symbol
.flags
= BSF_DEBUGGING
;
2771 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2775 case C_BINCL
: /* beginning of include file */
2776 case C_EINCL
: /* ending of include file */
2777 /* The value is actually a pointer into the line numbers
2778 of the file. We locate the line number entry, and
2779 set the section to the section which contains it, and
2780 the value to the index in that section. */
2784 dst
->symbol
.flags
= BSF_DEBUGGING
;
2785 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2786 if (sec
->line_filepos
<= (file_ptr
) src
->u
.syment
.n_value
2787 && ((file_ptr
) (sec
->line_filepos
2788 + sec
->lineno_count
* LINESZ
)
2789 > (file_ptr
) src
->u
.syment
.n_value
))
2792 dst
->symbol
.value
= 0;
2795 dst
->symbol
.section
= sec
;
2796 dst
->symbol
.value
= ((src
->u
.syment
.n_value
2797 - sec
->line_filepos
)
2805 dst
->symbol
.flags
= BSF_DEBUGGING
;
2807 /* The value is actually a symbol index. Save a pointer
2808 to the symbol instead of the index. FIXME: This
2809 should use a union. */
2810 src
->u
.syment
.n_value
=
2811 (long) (native_symbols
+ src
->u
.syment
.n_value
);
2812 dst
->symbol
.value
= src
->u
.syment
.n_value
;
2817 case C_BLOCK
: /* ".bb" or ".eb" */
2818 case C_FCN
: /* ".bf" or ".ef" */
2819 case C_EFCN
: /* physical end of function */
2820 dst
->symbol
.flags
= BSF_LOCAL
;
2822 Base the value as an index from the base of the section
2824 dst
->symbol
.value
= (src
->u
.syment
.n_value
) - dst
->symbol
.section
->vma
;
2828 case C_EXTDEF
: /* external definition */
2829 case C_ULABEL
: /* undefined label */
2830 case C_USTATIC
: /* undefined static */
2831 #ifndef COFF_WITH_PE
2832 /* C_LINE in regular coff is 0x68. NT has taken over this storage
2833 class to represent a section symbol */
2834 case C_LINE
: /* line # reformatted as symbol table entry */
2836 case C_ALIAS
: /* duplicate tag */
2837 case C_HIDDEN
: /* ext symbol in dmert public lib */
2839 (*_bfd_error_handler
)
2840 ("%s: Unrecognized storage class %d for %s symbol `%s'",
2841 bfd_get_filename (abfd
), src
->u
.syment
.n_sclass
,
2842 dst
->symbol
.section
->name
, dst
->symbol
.name
);
2843 dst
->symbol
.flags
= BSF_DEBUGGING
;
2844 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2848 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2852 dst
->symbol
.udata
.i
= 0;
2853 dst
->lineno
= (alent
*) NULL
;
2854 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
2856 number_of_symbols
++;
2857 } /* walk the native symtab */
2858 } /* bfdize the native symtab */
2860 obj_symbols (abfd
) = cached_area
;
2861 obj_raw_syments (abfd
) = native_symbols
;
2863 bfd_get_symcount (abfd
) = number_of_symbols
;
2864 obj_convert (abfd
) = table_ptr
;
2865 /* Slurp the line tables for each section too */
2871 coff_slurp_line_table (abfd
, p
);
2876 } /* coff_slurp_symbol_table() */
2878 /* Check whether a symbol is globally visible. This is used by the
2879 COFF backend linker code in cofflink.c, since a couple of targets
2880 have globally visible symbols which are not class C_EXT. This
2881 function need not handle the case of n_class == C_EXT. */
2883 #undef OTHER_GLOBAL_CLASS
2886 #define OTHER_GLOBAL_CLASS C_LEAFEXT
2890 #define OTHER_GLOBAL_CLASS C_SECTION
2893 #ifdef OTHER_GLOBAL_CLASS
2896 coff_sym_is_global (abfd
, syment
)
2898 struct internal_syment
*syment
;
2900 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
2905 #undef OTHER_GLOBAL_CLASS
2907 #else /* ! defined (OTHER_GLOBAL_CLASS) */
2909 /* sym_is_global should not be defined if it has nothing to do. */
2911 #define coff_sym_is_global 0
2913 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
2919 Coff relocations are easily transformed into the internal BFD form
2922 Reading a coff relocation table is done in the following stages:
2924 o Read the entire coff relocation table into memory.
2926 o Process each relocation in turn; first swap it from the
2927 external to the internal form.
2929 o Turn the symbol referenced in the relocation's symbol index
2930 into a pointer into the canonical symbol table.
2931 This table is the same as the one returned by a call to
2932 @code{bfd_canonicalize_symtab}. The back end will call that
2933 routine and save the result if a canonicalization hasn't been done.
2935 o The reloc index is turned into a pointer to a howto
2936 structure, in a back end specific way. For instance, the 386
2937 and 960 use the @code{r_type} to directly produce an index
2938 into a howto table vector; the 88k subtracts a number from the
2939 @code{r_type} field and creates an addend field.
2945 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2947 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2948 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2949 coffsym = (obj_symbols (abfd) \
2950 + (cache_ptr->sym_ptr_ptr - symbols)); \
2952 coffsym = coff_symbol_from (abfd, ptr); \
2953 if (coffsym != (coff_symbol_type *) NULL \
2954 && coffsym->native->u.syment.n_scnum == 0) \
2955 cache_ptr->addend = 0; \
2956 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2957 && ptr->section != (asection *) NULL) \
2958 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2960 cache_ptr->addend = 0; \
2965 coff_slurp_reloc_table (abfd
, asect
, symbols
)
2970 RELOC
*native_relocs
;
2971 arelent
*reloc_cache
;
2976 if (asect
->relocation
)
2978 if (asect
->reloc_count
== 0)
2980 if (asect
->flags
& SEC_CONSTRUCTOR
)
2982 if (!coff_slurp_symbol_table (abfd
))
2985 (RELOC
*) buy_and_read (abfd
,
2989 asect
->reloc_count
));
2990 reloc_cache
= (arelent
*)
2991 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
2993 if (reloc_cache
== NULL
)
2995 bfd_set_error (bfd_error_no_memory
);
3000 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
3002 #ifdef RELOC_PROCESSING
3003 struct internal_reloc dst
;
3004 struct external_reloc
*src
;
3006 cache_ptr
= reloc_cache
+ idx
;
3007 src
= native_relocs
+ idx
;
3008 coff_swap_reloc_in (abfd
, src
, &dst
);
3010 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
3012 struct internal_reloc dst
;
3014 struct external_reloc
*src
;
3016 cache_ptr
= reloc_cache
+ idx
;
3017 src
= native_relocs
+ idx
;
3019 coff_swap_reloc_in (abfd
, src
, &dst
);
3022 cache_ptr
->address
= dst
.r_vaddr
;
3024 if (dst
.r_symndx
!= -1)
3026 /* @@ Should never be greater than count of symbols! */
3027 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
3029 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[dst
.r_symndx
];
3030 ptr
= *(cache_ptr
->sym_ptr_ptr
);
3034 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
3038 /* The symbols definitions that we have read in have been
3039 relocated as if their sections started at 0. But the offsets
3040 refering to the symbols in the raw data have not been
3041 modified, so we have to have a negative addend to compensate.
3043 Note that symbols which used to be common must be left alone */
3045 /* Calculate any reloc addend by looking at the symbol */
3046 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
3048 cache_ptr
->address
-= asect
->vma
;
3049 /* !! cache_ptr->section = (asection *) NULL;*/
3051 /* Fill in the cache_ptr->howto field from dst.r_type */
3052 RTYPE2HOWTO (cache_ptr
, &dst
);
3057 asect
->relocation
= reloc_cache
;
3061 #ifndef coff_rtype_to_howto
3064 /* Get the howto structure for a reloc. This is only used if the file
3065 including this one defines coff_relocate_section to be
3066 _bfd_coff_generic_relocate_section, so it is OK if it does not
3067 always work. It is the responsibility of the including file to
3068 make sure it is reasonable if it is needed. */
3070 static reloc_howto_type
*coff_rtype_to_howto
3071 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
3072 struct coff_link_hash_entry
*, struct internal_syment
*,
3076 static reloc_howto_type
*
3077 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
3080 struct internal_reloc
*rel
;
3081 struct coff_link_hash_entry
*h
;
3082 struct internal_syment
*sym
;
3087 RTYPE2HOWTO (&genrel
, rel
);
3088 return genrel
.howto
;
3091 #else /* ! defined (RTYPE2HOWTO) */
3093 #define coff_rtype_to_howto NULL
3095 #endif /* ! defined (RTYPE2HOWTO) */
3096 #endif /* ! defined (coff_rtype_to_howto) */
3098 /* This is stupid. This function should be a boolean predicate. */
3100 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
3106 arelent
*tblptr
= section
->relocation
;
3107 unsigned int count
= 0;
3110 if (section
->flags
& SEC_CONSTRUCTOR
)
3112 /* this section has relocs made up by us, they are not in the
3113 file, so take them out of their chain and place them into
3114 the data area provided */
3115 arelent_chain
*chain
= section
->constructor_chain
;
3116 for (count
= 0; count
< section
->reloc_count
; count
++)
3118 *relptr
++ = &chain
->relent
;
3119 chain
= chain
->next
;
3125 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
3128 tblptr
= section
->relocation
;
3130 for (; count
++ < section
->reloc_count
;)
3131 *relptr
++ = tblptr
++;
3136 return section
->reloc_count
;
3141 coff_sym_filepos (abfd
)
3144 return obj_sym_filepos (abfd
);
3148 #ifndef coff_reloc16_estimate
3149 #define coff_reloc16_estimate dummy_reloc16_estimate
3152 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
3154 asection
*input_section
;
3156 unsigned int shrink
;
3157 struct bfd_link_info
*link_info
;
3164 #ifndef coff_reloc16_extra_cases
3165 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3166 /* This works even if abort is not declared in any header file. */
3168 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
3171 struct bfd_link_info
*link_info
;
3172 struct bfd_link_order
*link_order
;
3175 unsigned int *src_ptr
;
3176 unsigned int *dst_ptr
;
3182 /* If coff_relocate_section is defined, we can use the optimized COFF
3183 backend linker. Otherwise we must continue to use the old linker. */
3184 #ifdef coff_relocate_section
3185 #ifndef coff_bfd_link_hash_table_create
3186 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3188 #ifndef coff_bfd_link_add_symbols
3189 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3191 #ifndef coff_bfd_final_link
3192 #define coff_bfd_final_link _bfd_coff_final_link
3194 #else /* ! defined (coff_relocate_section) */
3195 #define coff_relocate_section NULL
3196 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3197 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3198 #define coff_bfd_final_link _bfd_generic_final_link
3199 #endif /* ! defined (coff_relocate_section) */
3200 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3202 #ifndef coff_start_final_link
3203 #define coff_start_final_link NULL
3206 #ifndef coff_adjust_symndx
3207 #define coff_adjust_symndx NULL
3210 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
3212 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
3213 coff_swap_aux_out
, coff_swap_sym_out
,
3214 coff_swap_lineno_out
, coff_swap_reloc_out
,
3215 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
3216 coff_swap_scnhdr_out
,
3217 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
3218 #ifdef COFF_LONG_FILENAMES
3223 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
3224 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
3225 coff_mkobject_hook
, styp_to_sec_flags
, coff_set_alignment_hook
,
3226 coff_slurp_symbol_table
, symname_in_debug_hook
, coff_pointerize_aux_hook
,
3227 coff_print_aux
, coff_reloc16_extra_cases
, coff_reloc16_estimate
,
3228 coff_sym_is_global
, coff_compute_section_file_positions
,
3229 coff_start_final_link
, coff_relocate_section
, coff_rtype_to_howto
,
3233 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3234 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3235 #define coff_get_section_contents _bfd_generic_get_section_contents
3237 #ifndef coff_bfd_copy_private_symbol_data
3238 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3241 #ifndef coff_bfd_copy_private_section_data
3242 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3245 #ifndef coff_bfd_copy_private_bfd_data
3246 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3249 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3250 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3252 #ifndef coff_bfd_print_private_bfd_data
3253 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3256 #ifndef coff_bfd_is_local_label
3257 #define coff_bfd_is_local_label bfd_generic_is_local_label
3259 #ifndef coff_read_minisymbols
3260 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3262 #ifndef coff_minisymbol_to_symbol
3263 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3266 /* The reloc lookup routine must be supplied by each individual COFF
3268 #ifndef coff_bfd_reloc_type_lookup
3269 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3272 #ifndef coff_bfd_get_relocated_section_contents
3273 #define coff_bfd_get_relocated_section_contents \
3274 bfd_generic_get_relocated_section_contents
3276 #ifndef coff_bfd_relax_section
3277 #define coff_bfd_relax_section bfd_generic_relax_section