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;
306 #if defined(COFF_IMAGE_WITH_PE) || (defined(COFF_OBJ_WITH_PE) && defined(PPC))
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
->maxdata
= internal_a
->o_maxdata
;
1006 xcoff
->maxstack
= internal_a
->o_maxstack
;
1014 /* Determine the machine architecture and type. FIXME: This is target
1015 dependent because the magic numbers are defined in the target
1016 dependent header files. But there is no particular need for this.
1017 If the magic numbers were moved to a separate file, this function
1018 would be target independent and would also be much more successful
1019 at linking together COFF files for different architectures. */
1022 coff_set_arch_mach_hook (abfd
, filehdr
)
1027 enum bfd_architecture arch
;
1028 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
1031 switch (internal_f
->f_magic
)
1035 arch
= bfd_arch_powerpc
;
1036 machine
= 0; /* what does this mean? (krk) */
1042 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
1043 case LYNXCOFFMAGIC
: /* shadows the m68k Lynx number below, sigh */
1044 arch
= bfd_arch_i386
;
1048 #ifdef A29K_MAGIC_BIG
1049 case A29K_MAGIC_BIG
:
1050 case A29K_MAGIC_LITTLE
:
1051 arch
= bfd_arch_a29k
;
1057 arch
= bfd_arch_arm
;
1064 #ifdef MC68KBCSMAGIC
1067 #ifdef APOLLOM68KMAGIC
1068 case APOLLOM68KMAGIC
:
1070 #ifdef LYNXCOFFMAGIC
1073 arch
= bfd_arch_m68k
;
1081 arch
= bfd_arch_m88k
;
1087 arch
= bfd_arch_z8k
;
1088 switch (internal_f
->f_flags
& F_MACHMASK
)
1091 machine
= bfd_mach_z8001
;
1094 machine
= bfd_mach_z8002
;
1105 arch
= bfd_arch_i960
;
1106 switch (F_I960TYPE
& internal_f
->f_flags
)
1110 machine
= bfd_mach_i960_core
;
1113 machine
= bfd_mach_i960_kb_sb
;
1116 machine
= bfd_mach_i960_mc
;
1119 machine
= bfd_mach_i960_xa
;
1122 machine
= bfd_mach_i960_ca
;
1125 machine
= bfd_mach_i960_ka_sa
;
1127 /* start-sanitize-i960xl */
1129 machine
= bfd_mach_i960_xl
;
1131 /* end-sanitize-i960xl */
1142 /* PowerPC Macs use the same magic numbers as RS/6000 (because
1143 that's how they were bootstrapped originally), but they are
1144 always PowerPC architecture. */
1145 arch
= bfd_arch_powerpc
;
1148 /* FIXME The architecture and machine can now (as of AIX 4.1) be
1149 identified by looking at fields in the a.out header. */
1150 arch
= bfd_arch_rs6000
;
1152 #endif /* POWERMAC */
1158 arch
= bfd_arch_we32k
;
1165 arch
= bfd_arch_h8300
;
1166 machine
= bfd_mach_h8300
;
1167 /* !! FIXME this probably isn't the right place for this */
1168 abfd
->flags
|= BFD_IS_RELAXABLE
;
1174 arch
= bfd_arch_h8300
;
1175 machine
= bfd_mach_h8300h
;
1176 /* !! FIXME this probably isn't the right place for this */
1177 abfd
->flags
|= BFD_IS_RELAXABLE
;
1181 #ifdef SH_ARCH_MAGIC_BIG
1182 case SH_ARCH_MAGIC_BIG
:
1183 case SH_ARCH_MAGIC_LITTLE
:
1191 arch
= bfd_arch_h8500
;
1198 #ifdef LYNXCOFFMAGIC
1201 arch
= bfd_arch_sparc
;
1206 default: /* Unreadable input file type */
1207 arch
= bfd_arch_obscure
;
1211 bfd_default_set_arch_mach (abfd
, arch
, machine
);
1215 #ifdef SYMNAME_IN_DEBUG
1218 symname_in_debug_hook (abfd
, sym
)
1220 struct internal_syment
*sym
;
1222 return SYMNAME_IN_DEBUG (sym
) ? true : false;
1227 #define symname_in_debug_hook \
1228 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1234 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1236 static boolean coff_pointerize_aux_hook
1237 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1238 unsigned int, combined_entry_type
*));
1242 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1244 combined_entry_type
*table_base
;
1245 combined_entry_type
*symbol
;
1246 unsigned int indaux
;
1247 combined_entry_type
*aux
;
1249 int class = symbol
->u
.syment
.n_sclass
;
1251 if ((class == C_EXT
|| class == C_HIDEXT
)
1252 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1254 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) == XTY_LD
)
1256 aux
->u
.auxent
.x_csect
.x_scnlen
.p
=
1257 table_base
+ aux
->u
.auxent
.x_csect
.x_scnlen
.l
;
1258 aux
->fix_scnlen
= 1;
1261 /* Return true to indicate that the caller should not do any
1262 further work on this auxent. */
1266 /* Return false to indicate that this auxent should be handled by
1274 /* We don't want to pointerize bal entries. */
1276 static boolean coff_pointerize_aux_hook
1277 PARAMS ((bfd
*, combined_entry_type
*, combined_entry_type
*,
1278 unsigned int, combined_entry_type
*));
1282 coff_pointerize_aux_hook (abfd
, table_base
, symbol
, indaux
, aux
)
1284 combined_entry_type
*table_base
;
1285 combined_entry_type
*symbol
;
1286 unsigned int indaux
;
1287 combined_entry_type
*aux
;
1289 /* Return true if we don't want to pointerize this aux entry, which
1290 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1291 return indaux
== 1 && symbol
->u
.syment
.n_sclass
== C_LEAFPROC
;
1296 #define coff_pointerize_aux_hook 0
1299 #endif /* ! RS6000COFF_C */
1301 /* Print an aux entry. This returns true if it has printed it. */
1303 static boolean coff_print_aux
1304 PARAMS ((bfd
*, FILE *, combined_entry_type
*, combined_entry_type
*,
1305 combined_entry_type
*, unsigned int));
1308 coff_print_aux (abfd
, file
, table_base
, symbol
, aux
, indaux
)
1311 combined_entry_type
*table_base
;
1312 combined_entry_type
*symbol
;
1313 combined_entry_type
*aux
;
1314 unsigned int indaux
;
1317 if ((symbol
->u
.syment
.n_sclass
== C_EXT
1318 || symbol
->u
.syment
.n_sclass
== C_HIDEXT
)
1319 && indaux
+ 1 == symbol
->u
.syment
.n_numaux
)
1321 /* This is a csect entry. */
1322 fprintf (file
, "AUX ");
1323 if (SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
) != XTY_LD
)
1325 BFD_ASSERT (! aux
->fix_scnlen
);
1326 fprintf (file
, "val %5ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1330 fprintf (file
, "indx ");
1331 if (! aux
->fix_scnlen
)
1332 fprintf (file
, "%4ld", aux
->u
.auxent
.x_csect
.x_scnlen
.l
);
1334 fprintf (file
, "%4ld",
1335 (long) (aux
->u
.auxent
.x_csect
.x_scnlen
.p
- table_base
));
1338 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1339 aux
->u
.auxent
.x_csect
.x_parmhash
,
1340 (unsigned int) aux
->u
.auxent
.x_csect
.x_snhash
,
1341 SMTYP_SMTYP (aux
->u
.auxent
.x_csect
.x_smtyp
),
1342 SMTYP_ALIGN (aux
->u
.auxent
.x_csect
.x_smtyp
),
1343 (unsigned int) aux
->u
.auxent
.x_csect
.x_smclas
,
1344 aux
->u
.auxent
.x_csect
.x_stab
,
1345 (unsigned int) aux
->u
.auxent
.x_csect
.x_snstab
);
1350 /* Return false to indicate that no special action was taken. */
1358 To write relocations, the back end steps though the
1359 canonical relocation table and create an
1360 @code{internal_reloc}. The symbol index to use is removed from
1361 the @code{offset} field in the symbol table supplied. The
1362 address comes directly from the sum of the section base
1363 address and the relocation offset; the type is dug directly
1364 from the howto field. Then the @code{internal_reloc} is
1365 swapped into the shape of an @code{external_reloc} and written
1371 coff_write_relocs (abfd
, first_undef
)
1376 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
)
1379 struct external_reloc dst
;
1381 arelent
**p
= s
->orelocation
;
1382 if (bfd_seek (abfd
, s
->rel_filepos
, SEEK_SET
) != 0)
1384 for (i
= 0; i
< s
->reloc_count
; i
++)
1386 struct internal_reloc n
;
1388 memset ((PTR
) & n
, 0, sizeof (n
));
1390 /* Now we've renumbered the symbols we know where the
1391 undefined symbols live in the table. Check the reloc
1392 entries for symbols who's output bfd isn't the right one.
1393 This is because the symbol was undefined (which means
1394 that all the pointers are never made to point to the same
1395 place). This is a bad thing,'cause the symbols attached
1396 to the output bfd are indexed, so that the relocation
1397 entries know which symbol index they point to. So we
1398 have to look up the output symbol here. */
1400 if (q
->sym_ptr_ptr
[0]->the_bfd
!= abfd
)
1403 const char *sname
= q
->sym_ptr_ptr
[0]->name
;
1404 asymbol
**outsyms
= abfd
->outsymbols
;
1405 for (i
= first_undef
; outsyms
[i
]; i
++)
1407 const char *intable
= outsyms
[i
]->name
;
1408 if (strcmp (intable
, sname
) == 0) {
1409 /* got a hit, so repoint the reloc */
1410 q
->sym_ptr_ptr
= outsyms
+ i
;
1416 n
.r_vaddr
= q
->address
+ s
->vma
;
1419 /* The 29k const/consth reloc pair is a real kludge. The consth
1420 part doesn't have a symbol; it has an offset. So rebuilt
1422 if (q
->howto
->type
== R_IHCONST
)
1423 n
.r_symndx
= q
->addend
;
1428 if (q
->sym_ptr_ptr
== bfd_abs_section_ptr
->symbol_ptr_ptr
)
1429 /* This is a relocation relative to the absolute symbol. */
1433 n
.r_symndx
= get_index ((*(q
->sym_ptr_ptr
)));
1434 /* Take notice if the symbol reloc points to a symbol
1435 we don't have in our symbol table. What should we
1437 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1442 #ifdef SWAP_OUT_RELOC_OFFSET
1443 n
.r_offset
= q
->addend
;
1447 /* Work out reloc type from what is required */
1448 SELECT_RELOC (n
, q
->howto
);
1450 n
.r_type
= q
->howto
->type
;
1452 coff_swap_reloc_out (abfd
, &n
, &dst
);
1453 if (bfd_write ((PTR
) & dst
, 1, RELSZ
, abfd
) != RELSZ
)
1461 /* Set flags and magic number of a coff file from architecture and machine
1462 type. Result is true if we can represent the arch&type, false if not. */
1465 coff_set_flags (abfd
, magicp
, flagsp
)
1468 unsigned short *flagsp
;
1470 switch (bfd_get_arch (abfd
))
1475 switch (bfd_get_mach (abfd
))
1477 case bfd_mach_z8001
:
1480 case bfd_mach_z8002
:
1494 *magicp
= I960ROMAGIC
;
1496 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1497 I960RWMAGIC); FIXME???
1499 switch (bfd_get_mach (abfd
))
1501 case bfd_mach_i960_core
:
1504 case bfd_mach_i960_kb_sb
:
1507 case bfd_mach_i960_mc
:
1510 case bfd_mach_i960_xa
:
1513 case bfd_mach_i960_ca
:
1516 case bfd_mach_i960_ka_sa
:
1519 /* start-sanitize-i960xl */
1520 case bfd_mach_i960_xl
:
1523 /* end-sanitize-i960xl */
1538 case bfd_arch_powerpc
:
1545 *magicp
= I386MAGIC
;
1547 /* Just overwrite the usual value if we're doing Lynx. */
1548 *magicp
= LYNXCOFFMAGIC
;
1555 #ifdef APOLLOM68KMAGIC
1556 *magicp
= APOLLO_COFF_VERSION_NUMBER
;
1558 *magicp
= MC68MAGIC
;
1561 /* Just overwrite the usual value if we're doing Lynx. */
1562 *magicp
= LYNXCOFFMAGIC
;
1570 *magicp
= MC88OMAGIC
;
1575 case bfd_arch_h8300
:
1576 switch (bfd_get_mach (abfd
))
1578 case bfd_mach_h8300
:
1579 *magicp
= H8300MAGIC
;
1581 case bfd_mach_h8300h
:
1582 *magicp
= H8300HMAGIC
;
1588 #ifdef SH_ARCH_MAGIC_BIG
1590 if (abfd
->xvec
->byteorder_big_p
)
1591 *magicp
= SH_ARCH_MAGIC_BIG
;
1593 *magicp
= SH_ARCH_MAGIC_LITTLE
;
1599 case bfd_arch_sparc
:
1600 *magicp
= SPARCMAGIC
;
1602 /* Just overwrite the usual value if we're doing Lynx. */
1603 *magicp
= LYNXCOFFMAGIC
;
1610 case bfd_arch_h8500
:
1611 *magicp
= H8500MAGIC
;
1615 #ifdef A29K_MAGIC_BIG
1617 if (abfd
->xvec
->byteorder_big_p
)
1618 *magicp
= A29K_MAGIC_BIG
;
1620 *magicp
= A29K_MAGIC_LITTLE
;
1626 case bfd_arch_we32k
:
1627 *magicp
= WE32KMAGIC
;
1633 case bfd_arch_rs6000
:
1635 case bfd_arch_powerpc
:
1637 *magicp
= U802TOCMAGIC
;
1642 default: /* Unknown architecture */
1643 /* return false; -- fall through to "return false" below, to avoid
1644 "statement never reached" errors on the one below. */
1653 coff_set_arch_mach (abfd
, arch
, machine
)
1655 enum bfd_architecture arch
;
1656 unsigned long machine
;
1659 unsigned short dummy2
;
1661 if (! bfd_default_set_arch_mach (abfd
, arch
, machine
))
1664 if (arch
!= bfd_arch_unknown
&&
1665 coff_set_flags (abfd
, &dummy1
, &dummy2
) != true)
1666 return false; /* We can't represent this type */
1668 return true; /* We're easy ... */
1672 /* Calculate the file position for each section. */
1675 coff_compute_section_file_positions (abfd
)
1679 asection
*previous
= (asection
*) NULL
;
1680 file_ptr sofar
= FILHSZ
;
1688 #ifdef COFF_IMAGE_WITH_PE
1690 if (coff_data (abfd
)->link_info
)
1692 page_size
= pe_data (abfd
)->pe_opthdr
.FileAlignment
;
1695 page_size
= PE_DEF_FILE_ALIGNMENT
;
1696 #elif defined (COFF_PAGE_SIZE)
1697 int page_size
= COFF_PAGE_SIZE
;
1700 if (bfd_get_start_address (abfd
))
1702 /* A start address may have been added to the original file. In this
1703 case it will need an optional header to record it. */
1704 abfd
->flags
|= EXEC_P
;
1707 if (abfd
->flags
& EXEC_P
)
1710 sofar
+= abfd
->section_count
* SCNHSZ
;
1711 for (current
= abfd
->sections
, count
= 1;
1712 current
!= (asection
*) NULL
;
1713 current
= current
->next
, ++count
)
1715 current
->target_index
= count
;
1717 /* Only deal with sections which have contents */
1718 if (!(current
->flags
& SEC_HAS_CONTENTS
))
1722 /* Do not include the .junk section. This is where we collect section
1723 data which we don't need. This is mainly the MS .debug$ data which
1724 stores codeview debug data. */
1725 if (strcmp (current
->name
, ".junk") == 0)
1731 /* Align the sections in the file to the same boundary on
1732 which they are aligned in virtual memory. I960 doesn't
1733 do this (FIXME) so we can stay in sync with Intel. 960
1734 doesn't yet page from files... */
1737 /* make sure this section is aligned on the right boundary - by
1738 padding the previous section up if necessary */
1741 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1742 if (previous
!= (asection
*) NULL
)
1744 previous
->_raw_size
+= sofar
- old_sofar
;
1750 /* In demand paged files the low order bits of the file offset
1751 must match the low order bits of the virtual address. */
1752 #ifdef COFF_PAGE_SIZE
1753 if ((abfd
->flags
& D_PAGED
) != 0
1754 && (current
->flags
& SEC_ALLOC
) != 0)
1755 sofar
+= (current
->vma
- sofar
) % page_size
;
1757 current
->filepos
= sofar
;
1759 #ifdef COFF_IMAGE_WITH_PE
1760 /* With PE we have to pad each section to be a multiple of its page size
1761 too, and remember both sizes. Cooked_size becomes very useful. */
1762 current
->_cooked_size
= current
->_raw_size
;
1763 current
->_raw_size
= (current
->_raw_size
+ page_size
-1) & -page_size
;
1766 sofar
+= current
->_raw_size
;
1769 /* make sure that this section is of the right size too */
1771 sofar
= BFD_ALIGN (sofar
, 1 << current
->alignment_power
);
1772 current
->_raw_size
+= sofar
- old_sofar
;
1776 /* Force .lib sections to start at zero. The vma is then
1777 incremented in coff_set_section_contents. This is right for
1779 if (strcmp (current
->name
, _LIB
) == 0)
1780 bfd_set_section_vma (abfd
, current
, 0);
1786 obj_relocbase (abfd
) = sofar
;
1787 abfd
->output_has_begun
= true;
1791 #ifndef RS6000COFF_C
1793 /* If .file, .text, .data, .bss symbols are missing, add them. */
1794 /* @@ Should we only be adding missing symbols, or overriding the aux
1795 values for existing section symbols? */
1797 coff_add_missing_symbols (abfd
)
1800 unsigned int nsyms
= bfd_get_symcount (abfd
);
1801 asymbol
**sympp
= abfd
->outsymbols
;
1804 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
1806 for (i
= 0; i
< nsyms
; i
++)
1808 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
1812 /* only do this if there is a coff representation of the input
1814 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
1819 name
= csym
->symbol
.name
;
1822 if (!strcmp (name
, _TEXT
))
1825 else if (!strcmp (name
, ".wtext"))
1828 else if (!strcmp (name
, _DATA
))
1830 else if (!strcmp (name
, _BSS
))
1834 /* Now i == bfd_get_symcount (abfd). */
1835 /* @@ For now, don't deal with .file symbol. */
1838 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
1840 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
1841 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
1844 bfd_set_error (bfd_error_no_memory
);
1847 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
1850 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1854 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
1856 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
1858 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
1859 BFD_ASSERT (i
== nsyms
);
1860 bfd_set_symtab (abfd
, sympp2
, nsyms
);
1864 #endif /* ! defined (RS6000COFF_C) */
1871 coff_write_object_contents (abfd
)
1875 boolean hasrelocs
= false;
1876 boolean haslinno
= false;
1877 file_ptr reloc_base
;
1878 file_ptr lineno_base
;
1880 unsigned long reloc_size
= 0;
1881 unsigned long lnno_size
= 0;
1882 asection
*text_sec
= NULL
;
1883 asection
*data_sec
= NULL
;
1884 asection
*bss_sec
= NULL
;
1886 struct internal_filehdr internal_f
;
1887 struct internal_aouthdr internal_a
;
1889 bfd_set_error (bfd_error_system_call
);
1891 if (abfd
->output_has_begun
== false)
1892 coff_compute_section_file_positions (abfd
);
1894 reloc_base
= obj_relocbase (abfd
);
1896 /* Make a pass through the symbol table to count line number entries and
1897 put them into the correct asections */
1899 lnno_size
= coff_count_linenumbers (abfd
) * LINESZ
;
1901 /* Work out the size of the reloc and linno areas */
1903 for (current
= abfd
->sections
; current
!= NULL
; current
=
1905 reloc_size
+= current
->reloc_count
* RELSZ
;
1907 lineno_base
= reloc_base
+ reloc_size
;
1908 sym_base
= lineno_base
+ lnno_size
;
1910 /* Indicate in each section->line_filepos its actual file address */
1911 for (current
= abfd
->sections
; current
!= NULL
; current
=
1914 if (current
->lineno_count
)
1916 current
->line_filepos
= lineno_base
;
1917 current
->moving_line_filepos
= lineno_base
;
1918 lineno_base
+= current
->lineno_count
* LINESZ
;
1922 current
->line_filepos
= 0;
1924 if (current
->reloc_count
)
1926 current
->rel_filepos
= reloc_base
;
1927 reloc_base
+= current
->reloc_count
* RELSZ
;
1931 current
->rel_filepos
= 0;
1935 /* Write section headers to the file. */
1936 internal_f
.f_nscns
= 0;
1939 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1940 (FILHSZ
+ AOUTSZ
) : FILHSZ
),
1944 for (current
= abfd
->sections
;
1946 current
= current
->next
)
1948 struct internal_scnhdr section
;
1951 /* Do not include the .junk section. This is where we collect section
1952 data which we don't need. This is mainly the MS .debug$ data which
1953 stores codeview debug data. */
1954 if (strcmp (current
->name
, ".junk") == 0)
1959 /* If we've got a .reloc section, remember. */
1961 if (strcmp (current
->name
, ".reloc") == 0)
1963 pe_data (abfd
)->has_reloc_section
= 1;
1966 internal_f
.f_nscns
++;
1967 strncpy (&(section
.s_name
[0]), current
->name
, 8);
1969 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1970 Ian Taylor <ian@cygnus.com>. */
1971 if (strcmp (current
->name
, _LIB
) == 0)
1972 section
.s_vaddr
= 0;
1975 section
.s_vaddr
= current
->lma
;
1976 section
.s_paddr
= current
->lma
;
1977 section
.s_size
= current
->_raw_size
;
1980 section
.s_paddr
= current
->_cooked_size
;
1984 If this section has no size or is unloadable then the scnptr
1987 if (current
->_raw_size
== 0 ||
1988 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
1990 section
.s_scnptr
= 0;
1994 section
.s_scnptr
= current
->filepos
;
1996 section
.s_relptr
= current
->rel_filepos
;
1997 section
.s_lnnoptr
= current
->line_filepos
;
1998 section
.s_nreloc
= current
->reloc_count
;
1999 section
.s_nlnno
= current
->lineno_count
;
2000 if (current
->reloc_count
!= 0)
2002 if (current
->lineno_count
!= 0)
2005 section
.s_flags
= sec_to_styp_flags (current
->name
, current
->flags
);
2007 if (!strcmp (current
->name
, _TEXT
))
2011 else if (!strcmp (current
->name
, _DATA
))
2015 else if (!strcmp (current
->name
, _BSS
))
2021 section
.s_align
= (current
->alignment_power
2022 ? 1 << current
->alignment_power
2027 #ifdef COFF_IMAGE_WITH_PE
2028 /* suppress output of the sections if they are null. ld includes
2029 the bss and data sections even if there is no size assigned
2030 to them. NT loader doesn't like it if these section headers are
2031 included if the sections themselves are not needed */
2032 if (section
.s_size
== 0)
2033 internal_f
.f_nscns
--;
2038 if (coff_swap_scnhdr_out (abfd
, §ion
, &buff
) == 0
2039 || bfd_write ((PTR
) (&buff
), 1, SCNHSZ
, abfd
) != SCNHSZ
)
2046 /* OK, now set up the filehdr... */
2048 /* Don't include the internal abs section in the section count */
2051 We will NOT put a fucking timestamp in the header here. Every time you
2052 put it back, I will come in and take it out again. I'm sorry. This
2053 field does not belong here. We fill it with a 0 so it compares the
2054 same but is not a reasonable time. -- gnu@cygnus.com
2056 internal_f
.f_timdat
= 0;
2058 internal_f
.f_flags
= 0;
2060 if (abfd
->flags
& EXEC_P
)
2061 internal_f
.f_opthdr
= AOUTSZ
;
2063 internal_f
.f_opthdr
= 0;
2066 internal_f
.f_flags
|= F_RELFLG
;
2068 internal_f
.f_flags
|= F_LNNO
;
2069 if (abfd
->flags
& EXEC_P
)
2070 internal_f
.f_flags
|= F_EXEC
;
2072 if (!abfd
->xvec
->byteorder_big_p
)
2073 internal_f
.f_flags
|= F_AR32WR
;
2075 internal_f
.f_flags
|= F_AR32W
;
2078 FIXME, should do something about the other byte orders and
2083 if ((abfd
->flags
& DYNAMIC
) != 0)
2084 internal_f
.f_flags
|= F_SHROBJ
;
2085 if (bfd_get_section_by_name (abfd
, _LOADER
) != NULL
)
2086 internal_f
.f_flags
|= F_DYNLOAD
;
2089 memset (&internal_a
, 0, sizeof internal_a
);
2091 /* Set up architecture-dependent stuff */
2094 unsigned int magic
= 0;
2095 unsigned short flags
= 0;
2096 coff_set_flags (abfd
, &magic
, &flags
);
2097 internal_f
.f_magic
= magic
;
2098 internal_f
.f_flags
|= flags
;
2099 /* ...and the "opt"hdr... */
2102 #ifdef ULTRA3 /* NYU's machine */
2103 /* FIXME: This is a bogus check. I really want to see if there
2104 * is a .shbss or a .shdata section, if so then set the magic
2105 * number to indicate a shared data executable.
2107 if (internal_f
.f_nscns
>= 7)
2108 internal_a
.magic
= SHMAGIC
; /* Shared magic */
2111 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
2112 #define __A_MAGIC_SET__
2115 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
2116 #define __A_MAGIC_SET__
2119 #define __A_MAGIC_SET__
2120 internal_a
.magic
= PAGEMAGICBCS
;
2124 #define __A_MAGIC_SET__
2125 internal_a
.magic
= APOLLO_COFF_VERSION_NUMBER
;
2128 #if defined(M68) || defined(WE32K) || defined(M68K)
2129 #define __A_MAGIC_SET__
2131 internal_a
.magic
= LYNXCOFFMAGIC
;
2133 #endif /* M68 || WE32K || M68K */
2136 #define __A_MAGIC_SET__
2137 internal_a
.magic
= ZMAGIC
;
2140 #define __A_MAGIC_SET__
2141 internal_a
.magic
= PPCMAGIC
;
2144 #define __A_MAGIC_SET__
2146 internal_a
.magic
= LYNXCOFFMAGIC
;
2148 internal_a
.magic
= ZMAGIC
;
2153 #define __A_MAGIC_SET__
2155 internal_a
.magic
= LYNXCOFFMAGIC
;
2160 #define __A_MAGIC_SET__
2161 internal_a
.magic
= (abfd
->flags
& D_PAGED
) ? RS6K_AOUTHDR_ZMAGIC
:
2162 (abfd
->flags
& WP_TEXT
) ? RS6K_AOUTHDR_NMAGIC
:
2163 RS6K_AOUTHDR_OMAGIC
;
2166 #ifndef __A_MAGIC_SET__
2167 #include "Your aouthdr magic number is not being set!"
2169 #undef __A_MAGIC_SET__
2173 /* FIXME: Does anybody ever set this to another value? */
2174 internal_a
.vstamp
= 0;
2176 /* Now should write relocs, strings, syms */
2177 obj_sym_filepos (abfd
) = sym_base
;
2179 if (bfd_get_symcount (abfd
) != 0)
2182 #ifndef RS6000COFF_C
2183 if (!coff_add_missing_symbols (abfd
))
2186 if (!coff_renumber_symbols (abfd
, &firstundef
))
2188 coff_mangle_symbols (abfd
);
2189 if (! coff_write_symbols (abfd
))
2191 if (! coff_write_linenumbers (abfd
))
2193 if (! coff_write_relocs (abfd
, firstundef
))
2197 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2198 backend linker, and obj_raw_syment_count is not valid until after
2199 coff_write_symbols is called. */
2200 if (obj_raw_syment_count (abfd
) != 0)
2202 internal_f
.f_symptr
= sym_base
;
2204 /* AIX appears to require that F_RELFLG not be set if there are
2205 local symbols but no relocations. */
2206 internal_f
.f_flags
&=~ F_RELFLG
;
2211 internal_f
.f_symptr
= 0;
2212 internal_f
.f_flags
|= F_LSYMS
;
2217 internal_a
.tsize
= bfd_get_section_size_before_reloc (text_sec
);
2218 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
2222 internal_a
.dsize
= bfd_get_section_size_before_reloc (data_sec
);
2223 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
2227 internal_a
.bsize
= bfd_get_section_size_before_reloc (bss_sec
);
2230 internal_a
.entry
= bfd_get_start_address (abfd
);
2231 internal_f
.f_nsyms
= obj_raw_syment_count (abfd
);
2234 if ((abfd
->flags
& EXEC_P
) != 0)
2237 asection
*loader_sec
;
2239 entry
= bfd_get_start_address (abfd
);
2240 if (text_sec
!= NULL
2241 && entry
>= text_sec
->vma
2242 && entry
< text_sec
->vma
+ bfd_section_size (abfd
, text_sec
))
2243 internal_a
.o_snentry
= text_sec
->target_index
;
2244 else if (data_sec
!= NULL
2245 && entry
>= data_sec
->vma
2246 && entry
< data_sec
->vma
+ bfd_section_size (abfd
, data_sec
))
2247 internal_a
.o_snentry
= data_sec
->target_index
;
2249 internal_a
.o_snentry
= 0;
2250 if (text_sec
!= NULL
)
2252 internal_a
.o_sntext
= text_sec
->target_index
;
2253 internal_a
.o_algntext
= bfd_get_section_alignment (abfd
, text_sec
);
2257 internal_a
.o_sntext
= 0;
2258 internal_a
.o_algntext
= 0;
2260 if (data_sec
!= NULL
)
2262 internal_a
.o_sndata
= data_sec
->target_index
;
2263 internal_a
.o_algndata
= bfd_get_section_alignment (abfd
, data_sec
);
2267 internal_a
.o_sndata
= 0;
2268 internal_a
.o_algndata
= 0;
2270 loader_sec
= bfd_get_section_by_name (abfd
, ".loader");
2271 if (loader_sec
!= NULL
)
2272 internal_a
.o_snloader
= loader_sec
->target_index
;
2274 internal_a
.o_snloader
= 0;
2275 if (bss_sec
!= NULL
)
2276 internal_a
.o_snbss
= bss_sec
->target_index
;
2278 internal_a
.o_snbss
= 0;
2280 toc
= xcoff_data (abfd
)->toc
;
2281 internal_a
.o_toc
= toc
;
2282 if (text_sec
!= NULL
2283 && toc
>= text_sec
->vma
2284 && toc
< text_sec
->vma
+ bfd_section_size (abfd
, text_sec
))
2285 internal_a
.o_sntoc
= text_sec
->target_index
;
2286 else if (data_sec
!= NULL
2287 && toc
>= data_sec
->vma
2288 && toc
< data_sec
->vma
+ bfd_section_size (abfd
, data_sec
))
2289 internal_a
.o_sntoc
= data_sec
->target_index
;
2291 internal_a
.o_sntoc
= 0;
2293 internal_a
.o_modtype
= xcoff_data (abfd
)->modtype
;
2294 internal_a
.o_maxstack
= xcoff_data (abfd
)->maxstack
;
2295 internal_a
.o_maxdata
= xcoff_data (abfd
)->maxdata
;
2299 /* now write them */
2300 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
2304 coff_swap_filehdr_out (abfd
, (PTR
) & internal_f
, (PTR
) & buff
);
2305 if (bfd_write ((PTR
) & buff
, 1, FILHSZ
, abfd
) != FILHSZ
)
2308 if (abfd
->flags
& EXEC_P
)
2311 coff_swap_aouthdr_out (abfd
, (PTR
) & internal_a
, (PTR
) & buff
);
2312 if (bfd_write ((PTR
) & buff
, 1, AOUTSZ
, abfd
) != AOUTSZ
)
2320 coff_set_section_contents (abfd
, section
, location
, offset
, count
)
2325 bfd_size_type count
;
2327 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
2328 coff_compute_section_file_positions (abfd
);
2331 /* If this is a .lib section, bump the vma address so that it
2332 winds up being the number of .lib sections output. This is
2333 right for SVR3.2. Shared libraries should probably get more
2334 generic support. Ian Taylor <ian@cygnus.com>. */
2335 if (strcmp (section
->name
, _LIB
) == 0)
2339 /* Don't write out bss sections - one way to do this is to
2340 see if the filepos has not been set. */
2341 if (section
->filepos
== 0)
2344 if (bfd_seek (abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
) != 0)
2349 return (bfd_write (location
, 1, count
, abfd
) == count
) ? true : false;
2355 coff_close_and_cleanup (abfd
)
2358 if (!bfd_read_p (abfd
))
2359 switch (abfd
->format
)
2362 if (!_bfd_write_archive_contents (abfd
))
2366 if (!coff_write_object_contents (abfd
))
2370 bfd_set_error (bfd_error_invalid_operation
);
2374 /* We depend on bfd_close to free all the memory on the obstack. */
2375 /* FIXME if bfd_release is not using obstacks! */
2382 buy_and_read (abfd
, where
, seek_direction
, size
)
2388 PTR area
= (PTR
) bfd_alloc (abfd
, size
);
2391 bfd_set_error (bfd_error_no_memory
);
2394 if (bfd_seek (abfd
, where
, seek_direction
) != 0
2395 || bfd_read (area
, 1, size
, abfd
) != size
)
2398 } /* buy_and_read() */
2404 Creating the linenumber table is done by reading in the entire
2405 coff linenumber table, and creating another table for internal use.
2407 A coff linenumber table is structured so that each function
2408 is marked as having a line number of 0. Each line within the
2409 function is an offset from the first line in the function. The
2410 base of the line number information for the table is stored in
2411 the symbol associated with the function.
2413 The information is copied from the external to the internal
2414 table, and each symbol which marks a function is marked by
2417 How does this work ?
2422 coff_slurp_line_table (abfd
, asect
)
2426 LINENO
*native_lineno
;
2427 alent
*lineno_cache
;
2429 BFD_ASSERT (asect
->lineno
== (alent
*) NULL
);
2431 native_lineno
= (LINENO
*) buy_and_read (abfd
,
2432 asect
->line_filepos
,
2435 asect
->lineno_count
));
2437 (alent
*) bfd_alloc (abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof (alent
)));
2438 if (lineno_cache
== NULL
)
2440 bfd_set_error (bfd_error_no_memory
);
2445 unsigned int counter
= 0;
2446 alent
*cache_ptr
= lineno_cache
;
2447 LINENO
*src
= native_lineno
;
2449 while (counter
< asect
->lineno_count
)
2451 struct internal_lineno dst
;
2452 coff_swap_lineno_in (abfd
, src
, &dst
);
2453 cache_ptr
->line_number
= dst
.l_lnno
;
2455 if (cache_ptr
->line_number
== 0)
2457 coff_symbol_type
*sym
=
2458 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
2459 + obj_raw_syments (abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
2460 cache_ptr
->u
.sym
= (asymbol
*) sym
;
2461 if (sym
->lineno
!= NULL
)
2463 (*_bfd_error_handler
)
2464 ("%s: warning: duplicate line number information for `%s'",
2465 bfd_get_filename (abfd
),
2466 bfd_asymbol_name (&sym
->symbol
));
2468 sym
->lineno
= cache_ptr
;
2472 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
2473 - bfd_section_vma (abfd
, asect
);
2474 } /* If no linenumber expect a symbol index */
2480 cache_ptr
->line_number
= 0;
2483 asect
->lineno
= lineno_cache
;
2484 /* FIXME, free native_lineno here, or use alloca or something. */
2489 coff_slurp_symbol_table (abfd
)
2492 combined_entry_type
*native_symbols
;
2493 coff_symbol_type
*cached_area
;
2494 unsigned int *table_ptr
;
2496 unsigned int number_of_symbols
= 0;
2498 if (obj_symbols (abfd
))
2501 /* Read in the symbol table */
2502 if ((native_symbols
= coff_get_normalized_symtab (abfd
)) == NULL
)
2507 /* Allocate enough room for all the symbols in cached form */
2508 cached_area
= ((coff_symbol_type
*)
2510 (obj_raw_syment_count (abfd
)
2511 * sizeof (coff_symbol_type
))));
2513 if (cached_area
== NULL
)
2515 bfd_set_error (bfd_error_no_memory
);
2518 table_ptr
= ((unsigned int *)
2520 (obj_raw_syment_count (abfd
)
2521 * sizeof (unsigned int))));
2523 if (table_ptr
== NULL
)
2525 bfd_set_error (bfd_error_no_memory
);
2530 coff_symbol_type
*dst
= cached_area
;
2531 unsigned int last_native_index
= obj_raw_syment_count (abfd
);
2532 unsigned int this_index
= 0;
2533 while (this_index
< last_native_index
)
2535 combined_entry_type
*src
= native_symbols
+ this_index
;
2536 table_ptr
[this_index
] = number_of_symbols
;
2537 dst
->symbol
.the_bfd
= abfd
;
2539 dst
->symbol
.name
= (char *) (src
->u
.syment
._n
._n_n
._n_offset
);
2540 /* We use the native name field to point to the cached field. */
2541 src
->u
.syment
._n
._n_n
._n_zeroes
= (long) dst
;
2542 dst
->symbol
.section
= coff_section_from_bfd_index (abfd
,
2543 src
->u
.syment
.n_scnum
);
2544 dst
->symbol
.flags
= 0;
2545 dst
->done_lineno
= false;
2547 switch (src
->u
.syment
.n_sclass
)
2552 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
2553 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2554 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2556 /* Fall through to next case */
2565 /* PE uses storage class 0x68 to denote a section symbol */
2568 if ((src
->u
.syment
.n_scnum
) == 0)
2570 if ((src
->u
.syment
.n_value
) == 0)
2572 dst
->symbol
.section
= bfd_und_section_ptr
;
2573 dst
->symbol
.value
= 0;
2577 dst
->symbol
.section
= bfd_com_section_ptr
;
2578 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2583 /* Base the value as an index from the base of the
2586 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
2587 dst
->symbol
.value
= (src
->u
.syment
.n_value
2588 - dst
->symbol
.section
->vma
);
2590 if (ISFCN ((src
->u
.syment
.n_type
)))
2592 /* A function ext does not go at the end of a
2594 dst
->symbol
.flags
|= BSF_NOT_AT_END
| BSF_FUNCTION
;
2599 /* A C_HIDEXT symbol is not global. */
2600 if (src
->u
.syment
.n_sclass
== C_HIDEXT
)
2601 dst
->symbol
.flags
= BSF_LOCAL
;
2602 /* A symbol with a csect entry should not go at the end. */
2603 if (src
->u
.syment
.n_numaux
> 0)
2604 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
2609 case C_STAT
: /* static */
2611 case C_LEAFSTAT
: /* static leaf procedure */
2613 case C_LABEL
: /* label */
2614 if (src
->u
.syment
.n_scnum
== -2)
2615 dst
->symbol
.flags
= BSF_DEBUGGING
;
2617 dst
->symbol
.flags
= BSF_LOCAL
;
2619 Base the value as an index from the base of the section, if
2622 if (dst
->symbol
.section
)
2623 dst
->symbol
.value
= (src
->u
.syment
.n_value
) -
2624 dst
->symbol
.section
->vma
;
2626 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2629 case C_MOS
: /* member of structure */
2630 case C_EOS
: /* end of structure */
2631 #ifdef NOTDEF /* C_AUTOARG has the same value */
2633 case C_GLBLREG
: /* A29k-specific storage class */
2636 case C_REGPARM
: /* register parameter */
2637 case C_REG
: /* register variable */
2639 case C_AUTOARG
: /* 960-specific storage class */
2641 case C_TPDEF
: /* type definition */
2643 case C_AUTO
: /* automatic variable */
2644 case C_FIELD
: /* bit field */
2645 case C_ENTAG
: /* enumeration tag */
2646 case C_MOE
: /* member of enumeration */
2647 case C_MOU
: /* member of union */
2648 case C_UNTAG
: /* union tag */
2649 dst
->symbol
.flags
= BSF_DEBUGGING
;
2650 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2653 case C_FILE
: /* file name */
2654 case C_STRTAG
: /* structure tag */
2667 dst
->symbol
.flags
= BSF_DEBUGGING
;
2668 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2672 case C_BINCL
: /* beginning of include file */
2673 case C_EINCL
: /* ending of include file */
2674 /* The value is actually a pointer into the line numbers
2675 of the file. We locate the line number entry, and
2676 set the section to the section which contains it, and
2677 the value to the index in that section. */
2681 dst
->symbol
.flags
= BSF_DEBUGGING
;
2682 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2683 if (sec
->line_filepos
<= src
->u
.syment
.n_value
2684 && (sec
->line_filepos
+ sec
->lineno_count
* LINESZ
2685 > src
->u
.syment
.n_value
))
2688 dst
->symbol
.value
= 0;
2691 dst
->symbol
.section
= sec
;
2692 dst
->symbol
.value
= ((src
->u
.syment
.n_value
2693 - sec
->line_filepos
)
2701 dst
->symbol
.flags
= BSF_DEBUGGING
;
2703 /* The value is actually a symbol index. Save a pointer
2704 to the symbol instead of the index. FIXME: This
2705 should use a union. */
2706 src
->u
.syment
.n_value
=
2707 (long) (native_symbols
+ src
->u
.syment
.n_value
);
2708 dst
->symbol
.value
= src
->u
.syment
.n_value
;
2713 case C_BLOCK
: /* ".bb" or ".eb" */
2714 case C_FCN
: /* ".bf" or ".ef" */
2715 case C_EFCN
: /* physical end of function */
2716 dst
->symbol
.flags
= BSF_LOCAL
;
2718 Base the value as an index from the base of the section
2720 dst
->symbol
.value
= (src
->u
.syment
.n_value
) - dst
->symbol
.section
->vma
;
2724 case C_EXTDEF
: /* external definition */
2725 case C_ULABEL
: /* undefined label */
2726 case C_USTATIC
: /* undefined static */
2727 #ifndef COFF_WITH_PE
2728 /* C_LINE in regular coff is 0x68. NT has taken over this storage
2729 class to represent a section symbol */
2730 case C_LINE
: /* line # reformatted as symbol table entry */
2732 case C_ALIAS
: /* duplicate tag */
2733 case C_HIDDEN
: /* ext symbol in dmert public lib */
2735 (*_bfd_error_handler
)
2736 ("%s: Unrecognized storage class %d for %s symbol `%s'",
2737 bfd_get_filename (abfd
), src
->u
.syment
.n_sclass
,
2738 dst
->symbol
.section
->name
, dst
->symbol
.name
);
2739 dst
->symbol
.flags
= BSF_DEBUGGING
;
2740 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2744 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2748 dst
->symbol
.udata
.i
= 0;
2749 dst
->lineno
= (alent
*) NULL
;
2750 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
2752 number_of_symbols
++;
2753 } /* walk the native symtab */
2754 } /* bfdize the native symtab */
2756 obj_symbols (abfd
) = cached_area
;
2757 obj_raw_syments (abfd
) = native_symbols
;
2759 bfd_get_symcount (abfd
) = number_of_symbols
;
2760 obj_convert (abfd
) = table_ptr
;
2761 /* Slurp the line tables for each section too */
2767 coff_slurp_line_table (abfd
, p
);
2772 } /* coff_slurp_symbol_table() */
2774 /* Check whether a symbol is globally visible. This is used by the
2775 COFF backend linker code in cofflink.c, since a couple of targets
2776 have globally visible symbols which are not class C_EXT. This
2777 function need not handle the case of n_class == C_EXT. */
2779 #undef OTHER_GLOBAL_CLASS
2782 #define OTHER_GLOBAL_CLASS C_LEAFEXT
2786 #define OTHER_GLOBAL_CLASS C_SECTION
2789 #ifdef OTHER_GLOBAL_CLASS
2792 coff_sym_is_global (abfd
, syment
)
2794 struct internal_syment
*syment
;
2796 if (syment
->n_sclass
== OTHER_GLOBAL_CLASS
)
2801 #undef OTHER_GLOBAL_CLASS
2803 #else /* ! defined (OTHER_GLOBAL_CLASS) */
2805 /* sym_is_global should not be defined if it has nothing to do. */
2807 #define coff_sym_is_global 0
2809 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
2815 Coff relocations are easily transformed into the internal BFD form
2818 Reading a coff relocation table is done in the following stages:
2820 o Read the entire coff relocation table into memory.
2822 o Process each relocation in turn; first swap it from the
2823 external to the internal form.
2825 o Turn the symbol referenced in the relocation's symbol index
2826 into a pointer into the canonical symbol table.
2827 This table is the same as the one returned by a call to
2828 @code{bfd_canonicalize_symtab}. The back end will call that
2829 routine and save the result if a canonicalization hasn't been done.
2831 o The reloc index is turned into a pointer to a howto
2832 structure, in a back end specific way. For instance, the 386
2833 and 960 use the @code{r_type} to directly produce an index
2834 into a howto table vector; the 88k subtracts a number from the
2835 @code{r_type} field and creates an addend field.
2841 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2843 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2844 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2845 coffsym = (obj_symbols (abfd) \
2846 + (cache_ptr->sym_ptr_ptr - symbols)); \
2848 coffsym = coff_symbol_from (abfd, ptr); \
2849 if (coffsym != (coff_symbol_type *) NULL \
2850 && coffsym->native->u.syment.n_scnum == 0) \
2851 cache_ptr->addend = 0; \
2852 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2853 && ptr->section != (asection *) NULL) \
2854 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2856 cache_ptr->addend = 0; \
2861 coff_slurp_reloc_table (abfd
, asect
, symbols
)
2866 RELOC
*native_relocs
;
2867 arelent
*reloc_cache
;
2872 if (asect
->relocation
)
2874 if (asect
->reloc_count
== 0)
2876 if (asect
->flags
& SEC_CONSTRUCTOR
)
2878 if (!coff_slurp_symbol_table (abfd
))
2881 (RELOC
*) buy_and_read (abfd
,
2885 asect
->reloc_count
));
2886 reloc_cache
= (arelent
*)
2887 bfd_alloc (abfd
, (size_t) (asect
->reloc_count
* sizeof (arelent
)));
2889 if (reloc_cache
== NULL
)
2891 bfd_set_error (bfd_error_no_memory
);
2896 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2898 #ifdef RELOC_PROCESSING
2899 struct internal_reloc dst
;
2900 struct external_reloc
*src
;
2902 cache_ptr
= reloc_cache
+ idx
;
2903 src
= native_relocs
+ idx
;
2904 coff_swap_reloc_in (abfd
, src
, &dst
);
2906 RELOC_PROCESSING (cache_ptr
, &dst
, symbols
, abfd
, asect
);
2908 struct internal_reloc dst
;
2910 struct external_reloc
*src
;
2912 cache_ptr
= reloc_cache
+ idx
;
2913 src
= native_relocs
+ idx
;
2915 coff_swap_reloc_in (abfd
, src
, &dst
);
2918 cache_ptr
->address
= dst
.r_vaddr
;
2920 if (dst
.r_symndx
!= -1)
2922 /* @@ Should never be greater than count of symbols! */
2923 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
2925 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[dst
.r_symndx
];
2926 ptr
= *(cache_ptr
->sym_ptr_ptr
);
2930 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
2934 /* The symbols definitions that we have read in have been
2935 relocated as if their sections started at 0. But the offsets
2936 refering to the symbols in the raw data have not been
2937 modified, so we have to have a negative addend to compensate.
2939 Note that symbols which used to be common must be left alone */
2941 /* Calculate any reloc addend by looking at the symbol */
2942 CALC_ADDEND (abfd
, ptr
, dst
, cache_ptr
);
2944 cache_ptr
->address
-= asect
->vma
;
2945 /* !! cache_ptr->section = (asection *) NULL;*/
2947 /* Fill in the cache_ptr->howto field from dst.r_type */
2948 RTYPE2HOWTO (cache_ptr
, &dst
);
2953 asect
->relocation
= reloc_cache
;
2957 #ifndef coff_rtype_to_howto
2960 /* Get the howto structure for a reloc. This is only used if the file
2961 including this one defines coff_relocate_section to be
2962 _bfd_coff_generic_relocate_section, so it is OK if it does not
2963 always work. It is the responsibility of the including file to
2964 make sure it is reasonable if it is needed. */
2966 static reloc_howto_type
*coff_rtype_to_howto
2967 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
2968 struct coff_link_hash_entry
*, struct internal_syment
*,
2972 static reloc_howto_type
*
2973 coff_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
2976 struct internal_reloc
*rel
;
2977 struct coff_link_hash_entry
*h
;
2978 struct internal_syment
*sym
;
2983 RTYPE2HOWTO (&genrel
, rel
);
2984 return genrel
.howto
;
2987 #else /* ! defined (RTYPE2HOWTO) */
2989 #define coff_rtype_to_howto NULL
2991 #endif /* ! defined (RTYPE2HOWTO) */
2992 #endif /* ! defined (coff_rtype_to_howto) */
2994 /* This is stupid. This function should be a boolean predicate. */
2996 coff_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
3002 arelent
*tblptr
= section
->relocation
;
3003 unsigned int count
= 0;
3006 if (section
->flags
& SEC_CONSTRUCTOR
)
3008 /* this section has relocs made up by us, they are not in the
3009 file, so take them out of their chain and place them into
3010 the data area provided */
3011 arelent_chain
*chain
= section
->constructor_chain
;
3012 for (count
= 0; count
< section
->reloc_count
; count
++)
3014 *relptr
++ = &chain
->relent
;
3015 chain
= chain
->next
;
3021 if (! coff_slurp_reloc_table (abfd
, section
, symbols
))
3024 tblptr
= section
->relocation
;
3026 for (; count
++ < section
->reloc_count
;)
3027 *relptr
++ = tblptr
++;
3032 return section
->reloc_count
;
3037 coff_sym_filepos (abfd
)
3040 return obj_sym_filepos (abfd
);
3044 #ifndef coff_reloc16_estimate
3045 #define coff_reloc16_estimate dummy_reloc16_estimate
3048 dummy_reloc16_estimate (abfd
, input_section
, reloc
, shrink
, link_info
)
3050 asection
*input_section
;
3052 unsigned int shrink
;
3053 struct bfd_link_info
*link_info
;
3060 #ifndef coff_reloc16_extra_cases
3061 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3062 /* This works even if abort is not declared in any header file. */
3064 dummy_reloc16_extra_cases (abfd
, link_info
, link_order
, reloc
, data
, src_ptr
,
3067 struct bfd_link_info
*link_info
;
3068 struct bfd_link_order
*link_order
;
3071 unsigned int *src_ptr
;
3072 unsigned int *dst_ptr
;
3078 /* If coff_relocate_section is defined, we can use the optimized COFF
3079 backend linker. Otherwise we must continue to use the old linker. */
3080 #ifdef coff_relocate_section
3081 #ifndef coff_bfd_link_hash_table_create
3082 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3084 #ifndef coff_bfd_link_add_symbols
3085 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3087 #ifndef coff_bfd_final_link
3088 #define coff_bfd_final_link _bfd_coff_final_link
3090 #else /* ! defined (coff_relocate_section) */
3091 #define coff_relocate_section NULL
3092 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3093 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3094 #define coff_bfd_final_link _bfd_generic_final_link
3095 #endif /* ! defined (coff_relocate_section) */
3096 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3098 #ifndef coff_start_final_link
3099 #define coff_start_final_link NULL
3102 #ifndef coff_adjust_symndx
3103 #define coff_adjust_symndx NULL
3106 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
=
3108 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
3109 coff_swap_aux_out
, coff_swap_sym_out
,
3110 coff_swap_lineno_out
, coff_swap_reloc_out
,
3111 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
3112 coff_swap_scnhdr_out
,
3113 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, RELSZ
, LINESZ
,
3114 #ifdef COFF_LONG_FILENAMES
3119 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
3120 coff_swap_reloc_in
, coff_bad_format_hook
, coff_set_arch_mach_hook
,
3121 coff_mkobject_hook
, styp_to_sec_flags
, coff_set_alignment_hook
,
3122 coff_slurp_symbol_table
, symname_in_debug_hook
, coff_pointerize_aux_hook
,
3123 coff_print_aux
, coff_reloc16_extra_cases
, coff_reloc16_estimate
,
3124 coff_sym_is_global
, coff_compute_section_file_positions
,
3125 coff_start_final_link
, coff_relocate_section
, coff_rtype_to_howto
,
3129 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3130 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3131 #define coff_get_section_contents _bfd_generic_get_section_contents
3133 #ifndef coff_bfd_copy_private_symbol_data
3134 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3137 #ifndef coff_bfd_copy_private_section_data
3138 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3141 #ifndef coff_bfd_copy_private_bfd_data
3142 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3145 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3146 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3148 #ifndef coff_bfd_print_private_bfd_data
3149 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3152 #ifndef coff_bfd_is_local_label
3153 #define coff_bfd_is_local_label bfd_generic_is_local_label
3155 #ifndef coff_read_minisymbols
3156 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3158 #ifndef coff_minisymbol_to_symbol
3159 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3162 /* The reloc lookup routine must be supplied by each individual COFF
3164 #ifndef coff_bfd_reloc_type_lookup
3165 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3168 #ifndef coff_bfd_get_relocated_section_contents
3169 #define coff_bfd_get_relocated_section_contents \
3170 bfd_generic_get_relocated_section_contents
3172 #ifndef coff_bfd_relax_section
3173 #define coff_bfd_relax_section bfd_generic_relax_section