1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 1991, 1992, 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 Most of this hacked by Steve Chamberlain,
30 BFD supports a number of different flavours of coff format.
31 The major difference between formats are the sizes and
32 alignments of fields in structures on disk, and the occasional
35 Coff in all its varieties is implimented 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 @code{coff-m88k.c}. This file @code{#include}s
39 @code{coff/m88k.h} which defines the external structure of the
40 coff format for the 88k, and @code{coff/internal.h} which
41 defines the internal structure. @code{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 @code{coff-i960.c}. This file has the same structure as
47 @code{coff-m88k.c}, except that it includes @code{coff/i960.h}
48 rather than @code{coff-m88k.h}.
51 Porting To A New Version of Coff
53 The recommended method is to select from the existing
54 implimentations the version of coff which is most like the one
55 you want to use, for our purposes, we'll say that i386 coff is
56 the one you select, and that your coff flavour is called foo.
57 Copy the @code{i386coff.c} to @code{foocoff.c}, copy
58 @code{../include/coff/i386.h} to @code{../include/coff/foo.h}
59 and add the lines to @code{targets.c} and @code{Makefile.in}
60 so that your new back end is used. Alter the shapes of the
61 structures in @code{../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 @code{coff/internal.h} and
64 @code{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 @code{objdump} from the @code{binutils} directory,
68 and making sure that its version of what's going on at your
69 host systems 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 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 descibing the external layout of the structures. There is also
116 an internal description of the coff layout (in
117 @code{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 @code{coffcode.h}. Eg 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 for 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. This 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 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 changes 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 in 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 was born, and on output
194 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. Note that 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 to an index into the symbol table of the symbol
233 This routine runs through the symbol table and patches up the
234 symbols from their internal form into the coff way, calls the
235 bit twiddlers and writes out the tabel to the file.
244 The hidden information for an asymbol is described in a
245 coff_ptr_struct, which is typedefed to a combined_entry_type
249 .typedef struct coff_ptr_struct
252 . {* Remembers the offset from the first symbol in the file for
253 . this symbol. Generated by coff_renumber_symbols. *}
254 .unsigned int offset;
256 . {* Should the tag field of this symbol be renumbered.
257 . Created by coff_pointerize_aux. *}
260 . {* Should the endidx field of this symbol be renumbered.
261 . Created by coff_pointerize_aux. *}
264 . {* The container for the symbol structure as read and translated
268 . union internal_auxent auxent;
269 . struct internal_syment syment;
271 .} combined_entry_type;
274 .{* Each canonical asymbol really looks like this: *}
276 .typedef struct coff_symbol_struct
278 . {* The actual symbol which the rest of BFD works with *}
281 . {* A pointer to the hidden information for this symbol *}
282 .combined_entry_type *native;
284 . {* A pointer to the linenumber information for this symbol *}
285 .struct lineno_cache_entry *lineno;
287 . {* Have the line numbers been relocated yet ? *}
288 .boolean done_lineno;
295 #include "coffswap.h"
297 /* void warning(); */
300 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
301 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
302 * NOTE: If you add to/change this routine, you should mirror the changes
303 * in styp_to_sec_flags().
306 DEFUN(sec_to_styp_flags
, (sec_name
, sec_flags
),
307 CONST
char * sec_name AND
312 if (!strcmp(sec_name
, _TEXT
))
314 styp_flags
= STYP_TEXT
;
316 else if (!strcmp(sec_name
, _DATA
))
318 styp_flags
= STYP_DATA
;
321 else if (!strcmp(sec_name
, ".data2"))
323 styp_flags
= STYP_DATA
;
324 #endif /* TWO_DATA_SECS */
326 else if (!strcmp(sec_name
, _BSS
))
328 styp_flags
= STYP_BSS
;
331 else if (!strcmp(sec_name
, _COMMENT
))
333 styp_flags
= STYP_INFO
;
334 #endif /* _COMMENT */
337 else if (!strcmp(sec_name
, _LIB
))
339 styp_flags
= STYP_LIB
;
343 else if (!strcmp (sec_name
, _LIT
))
345 styp_flags
= STYP_LIT
;
349 /* Try and figure out what it should be */
350 else if (sec_flags
& SEC_CODE
)
352 styp_flags
= STYP_TEXT
;
354 else if (sec_flags
& SEC_DATA
)
356 styp_flags
= STYP_DATA
;
358 else if (sec_flags
& SEC_READONLY
)
360 #ifdef STYP_LIT /* 29k readonly text/data section */
361 styp_flags
= STYP_LIT
;
363 styp_flags
= STYP_TEXT
;
364 #endif /* STYP_LIT */
366 else if (sec_flags
& SEC_LOAD
)
368 styp_flags
= STYP_TEXT
;
371 styp_flags
= STYP_BSS
;
375 if (sec_flags
& SEC_NEVER_LOAD
)
376 styp_flags
|= STYP_NOLOAD
;
382 * Return a word with SEC_* flags set to represent the incoming
383 * STYP_* flags (from scnhdr.s_flags). The inverse of this
384 * function is sec_to_styp_flags().
385 * NOTE: If you add to/change this routine, you should mirror the changes
386 * in sec_to_styp_flags().
389 DEFUN(styp_to_sec_flags
, (abfd
, hdr
),
393 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
394 long styp_flags
= internal_s
->s_flags
;
395 flagword sec_flags
=0;
398 if (styp_flags
& STYP_NOLOAD
)
400 sec_flags
|= SEC_NEVER_LOAD
;
402 #endif /* STYP_NOLOAD */
404 /* For 386 COFF, at least, an unloadable text or data section is
405 actually a shared library section. */
406 if (styp_flags
& STYP_TEXT
)
408 if (sec_flags
& SEC_NEVER_LOAD
)
409 sec_flags
|= SEC_CODE
| SEC_SHARED_LIBRARY
;
411 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
413 else if (styp_flags
& STYP_DATA
)
415 if (sec_flags
& SEC_NEVER_LOAD
)
416 sec_flags
|= SEC_DATA
| SEC_SHARED_LIBRARY
;
418 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
420 else if (styp_flags
& STYP_BSS
)
422 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
423 if (sec_flags
& SEC_NEVER_LOAD
)
424 sec_flags
|= SEC_ALLOC
| SEC_SHARED_LIBRARY
;
427 sec_flags
|= SEC_ALLOC
;
429 else if (styp_flags
& STYP_INFO
)
435 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
438 #ifdef STYP_LIT /* A29k readonly text/data section type */
439 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
441 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
443 #endif /* STYP_LIT */
444 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
445 if (styp_flags
& STYP_OTHER_LOAD
)
447 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
449 #endif /* STYP_SDATA */
454 #define get_index(symbol) ((int) (symbol)->udata)
458 bfd_coff_backend_data
462 Special entry points for gdb to swap in coff symbol table parts
465 . void (*_bfd_coff_swap_aux_in) PARAMS ((
472 . void (*_bfd_coff_swap_sym_in) PARAMS ((
477 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
483 Special entry points for gas to swap coff parts
485 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
492 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
497 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
502 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
507 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
512 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
517 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
523 Special entry points for generic COFF routines to call target
524 dependent COFF routines
526 . unsigned int _bfd_filhsz;
527 . unsigned int _bfd_aoutsz;
528 . unsigned int _bfd_scnhsz;
529 . unsigned int _bfd_symesz;
530 . unsigned int _bfd_auxesz;
531 . unsigned int _bfd_linesz;
532 . boolean _bfd_coff_long_filenames;
533 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
537 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
541 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
545 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
547 . PTR internal_filehdr));
548 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
550 . PTR internal_filehdr));
551 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
553 . PTR internal_filehdr,
554 . PTR internal_aouthdr));
555 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
557 . PTR internal_scnhdr));
558 . asection *(*_bfd_make_section_hook) PARAMS ((
561 . void (*_bfd_set_alignment_hook) PARAMS ((
564 . PTR internal_scnhdr));
565 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
567 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
569 . struct internal_syment *sym));
570 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
572 . struct bfd_seclet *seclet,
575 . unsigned int *src_ptr,
576 . unsigned int *dst_ptr));
577 .} bfd_coff_backend_data;
579 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
581 .#define bfd_coff_swap_aux_in(a,e,t,c,i) \
582 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,i))
584 .#define bfd_coff_swap_sym_in(a,e,i) \
585 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
587 .#define bfd_coff_swap_lineno_in(a,e,i) \
588 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
590 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
591 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
593 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
594 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
596 .#define bfd_coff_swap_aux_out(abfd, i, t,c,o) \
597 . ((coff_backend_info (abfd)->_bfd_coff_swap_aux_out) (abfd, i,t,c, o))
599 .#define bfd_coff_swap_sym_out(abfd, i,o) \
600 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
602 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
603 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
605 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
606 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
608 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
609 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
611 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
612 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
613 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
614 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
615 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
616 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
617 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
618 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
619 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
621 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
622 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
624 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
625 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
627 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
628 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
630 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
631 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
632 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
633 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
635 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr)\
636 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr))
638 .#define bfd_coff_make_section_hook(abfd, name)\
639 . ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
641 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
642 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
644 .#define bfd_coff_slurp_symbol_table(abfd)\
645 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
647 .#define bfd_coff_symname_in_debug(abfd, sym)\
648 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
650 .#define bfd_coff_reloc16_extra_cases(abfd, seclet, reloc, data, src_ptr, dst_ptr)\
651 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
652 . (abfd, seclet, reloc, data, src_ptr, dst_ptr))
656 /* See whether the magic number matches. */
659 DEFUN(coff_bad_format_hook
, (abfd
, filehdr
),
663 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
665 if (BADMAG (*internal_f
))
668 /* if the optional header is NULL or not the correct size then
669 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
670 and Intel 960 readwrite headers (I960WRMAGIC) is that the
671 optional header is of a different size.
673 But the mips keeps extra stuff in it's opthdr, so dont check
677 #if defined(M88) || defined(I960)
678 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
686 DEFUN (coff_make_section_hook
, (abfd
, name
),
691 /* On SCO a file created by the Microsoft assembler can have two
692 .data sections. We use .data2 for the second one. */
693 if (strcmp (name
, _DATA
) == 0)
694 return bfd_make_section (abfd
, ".data2");
696 return (asection
*) NULL
;
700 initialize a section structure with information peculiar to this
701 particular implementation of coff
705 DEFUN(coff_new_section_hook
,(abfd
, section
),
709 section
->alignment_power
= abfd
->xvec
->align_power_min
;
710 /* Allocate aux records for section symbols, to store size and
713 @@ Shouldn't use constant multiplier here! */
714 coffsymbol (section
->symbol
)->native
=
715 (combined_entry_type
*) bfd_zalloc (abfd
,
716 sizeof (combined_entry_type
) * 10);
723 /* Set the alignment of a BFD section. */
726 DEFUN (coff_set_alignment_hook
, (abfd
, section
, scnhdr
),
728 asection
*section AND
731 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
734 for (i
= 0; i
< 32; i
++)
735 if ((1 << i
) >= hdr
->s_align
)
737 section
->alignment_power
= i
;
742 #define coff_set_alignment_hook \
743 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
748 DEFUN(coff_mkobject
,(abfd
),
751 coff_data_type
*coff
;
753 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*)bfd_zalloc (abfd
,sizeof(coff_data_type
));
754 if (abfd
->tdata
.coff_obj_data
== 0){
755 bfd_error
= no_memory
;
758 coff
= coff_data (abfd
);
759 coff
->symbols
= (coff_symbol_type
*) NULL
;
760 coff
->conversion_table
= (unsigned int *) NULL
;
761 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
762 coff
->raw_linenos
= (struct lineno
*) NULL
;
764 /* make_abs_section(abfd);*/
768 /* Create the COFF backend specific information. */
771 DEFUN(coff_mkobject_hook
,(abfd
, filehdr
, aouthdr
),
776 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
777 coff_data_type
*coff
;
779 if (coff_mkobject (abfd
) == false)
782 coff
= coff_data (abfd
);
784 coff
->sym_filepos
= internal_f
->f_symptr
;
785 coff
->flags
= internal_f
->f_flags
;
787 /* These members communicate important constants about the symbol
788 table to GDB's symbol-reading code. These `constants'
789 unfortunately vary among coff implementations... */
790 coff
->local_n_btmask
= N_BTMASK
;
791 coff
->local_n_btshft
= N_BTSHFT
;
792 coff
->local_n_tmask
= N_TMASK
;
793 coff
->local_n_tshift
= N_TSHIFT
;
794 coff
->local_symesz
= SYMESZ
;
795 coff
->local_auxesz
= AUXESZ
;
796 coff
->local_linesz
= LINESZ
;
801 /* Determine the machine architecture and type. FIXME: This is target
802 dependent because the magic numbers are defined in the target
803 dependent header files. But there is no particular need for this.
804 If the magic numbers were moved to a separate file, this function
805 would be target independent and would also be much more successful
806 at linking together COFF files for different architectures. */
809 DEFUN (coff_set_arch_mach_hook
, (abfd
, filehdr
),
814 enum bfd_architecture arch
;
815 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
818 switch (internal_f
->f_magic
) {
822 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
824 arch
= bfd_arch_i386
;
829 #ifdef A29K_MAGIC_BIG
831 case A29K_MAGIC_LITTLE
:
832 arch
= bfd_arch_a29k
;
840 arch
= bfd_arch_m68k
;
848 arch
= bfd_arch_m88k
;
855 switch (internal_f
->f_flags
& F_MACHMASK
)
858 machine
= bfd_mach_z8001
;
861 machine
= bfd_mach_z8002
;
872 arch
= bfd_arch_i960
;
873 switch (F_I960TYPE
& internal_f
->f_flags
)
877 machine
= bfd_mach_i960_core
;
880 machine
= bfd_mach_i960_kb_sb
;
883 machine
= bfd_mach_i960_mc
;
886 machine
= bfd_mach_i960_xa
;
889 machine
= bfd_mach_i960_ca
;
892 machine
= bfd_mach_i960_ka_sa
;
903 arch
= bfd_arch_rs6000
;
910 arch
= bfd_arch_we32k
;
917 arch
= bfd_arch_h8300
;
919 /* !! FIXME this probably isn't the right place for this */
920 abfd
->flags
|= BFD_IS_RELAXABLE
;
933 arch
= bfd_arch_h8500
;
938 default: /* Unreadable input file type */
939 arch
= bfd_arch_obscure
;
943 bfd_default_set_arch_mach(abfd
, arch
, machine
);
947 #ifdef SYMNAME_IN_DEBUG
950 DEFUN (symname_in_debug_hook
, (abfd
, sym
),
952 struct internal_syment
*sym
)
954 return SYMNAME_IN_DEBUG (sym
) ? true : false;
959 #define symname_in_debug_hook \
960 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
968 To write relocations, all the back end does is step though the
969 canonical relocation table, and create an
970 @code{internal_reloc}. The symbol index to use is removed from
971 the @code{offset} field in the symbol table supplied, the
972 address comes directly from the sum of the section base
973 address and the relocation offset and the type is dug directly
974 from the howto field. Then the @code{internal_reloc} is
975 swapped into the shape of an @code{external_reloc} and written
981 DEFUN(coff_write_relocs
,(abfd
),
985 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
) {
987 struct external_reloc dst
;
989 arelent
**p
= s
->orelocation
;
990 bfd_seek(abfd
, s
->rel_filepos
, SEEK_SET
);
991 for (i
= 0; i
< s
->reloc_count
; i
++) {
992 struct internal_reloc n
;
994 memset((PTR
)&n
, 0, sizeof(n
));
996 n
.r_vaddr
= q
->address
+ s
->vma
;
997 /* The 29k const/consth reloc pair is a real kludge - the consth
998 part doesn't have a symbol - it has an offset. So rebuilt
1001 if (q
->howto
->type
== R_IHCONST
)
1002 n
.r_symndx
= q
->addend
;
1009 if (q
->sym_ptr_ptr
== bfd_abs_section
.symbol_ptr_ptr
)
1011 /* This is a relocation relative to the absolute symbol */
1016 n
.r_symndx
= get_index((*(q
->sym_ptr_ptr
)));
1017 /* Take notice if the symbol reloc points to a symbol we don't have
1018 in our symbol table. What should we do for this?? */
1019 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1027 /* Work out reloc type from what is required */
1028 SELECT_RELOC(n
.r_type
, q
->howto
);
1030 n
.r_type
= q
->howto
->type
;
1032 coff_swap_reloc_out(abfd
, &n
, &dst
);
1033 bfd_write((PTR
) &dst
, 1, RELSZ
, abfd
);
1038 /* Set flags and magic number of a coff file from architecture and machine
1039 type. Result is true if we can represent the arch&type, false if not. */
1042 DEFUN(coff_set_flags
,(abfd
, magicp
, flagsp
),
1044 unsigned *magicp AND
1045 unsigned short *flagsp
)
1047 switch (bfd_get_arch(abfd
)) {
1051 switch (bfd_get_mach(abfd
))
1053 case bfd_mach_z8001
:
1056 case bfd_mach_z8002
:
1070 *magicp
= I960ROMAGIC
;
1072 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1073 I960RWMAGIC); FIXME???
1075 switch (bfd_get_mach(abfd
)) {
1076 case bfd_mach_i960_core
:
1079 case bfd_mach_i960_kb_sb
:
1082 case bfd_mach_i960_mc
:
1085 case bfd_mach_i960_xa
:
1088 case bfd_mach_i960_ca
:
1091 case bfd_mach_i960_ka_sa
:
1104 *magicp
= I386MAGIC
;
1110 *magicp
= MC68MAGIC
;
1117 *magicp
= MC88OMAGIC
;
1122 case bfd_arch_h8300
:
1123 *magicp
= H8300MAGIC
;
1136 case bfd_arch_h8500
:
1137 *magicp
= H8500MAGIC
;
1141 #ifdef A29K_MAGIC_BIG
1143 if (abfd
->xvec
->byteorder_big_p
)
1144 *magicp
= A29K_MAGIC_BIG
;
1146 *magicp
= A29K_MAGIC_LITTLE
;
1152 case bfd_arch_we32k
:
1153 *magicp
= WE32KMAGIC
;
1159 case bfd_arch_rs6000
:
1160 *magicp
= U802TOCMAGIC
;
1165 default: /* Unknown architecture */
1166 /* return false; -- fall through to "return false" below, to avoid
1167 "statement never reached" errors on the one below. */
1176 DEFUN(coff_set_arch_mach
,(abfd
, arch
, machine
),
1178 enum bfd_architecture arch AND
1179 unsigned long machine
)
1182 unsigned short dummy2
;
1183 bfd_default_set_arch_mach(abfd
, arch
, machine
);
1185 if (arch
!= bfd_arch_unknown
&&
1186 coff_set_flags(abfd
, &dummy1
, &dummy2
) != true)
1187 return false; /* We can't represent this type */
1188 return true; /* We're easy ... */
1192 /* Calculate the file position for each section. */
1195 DEFUN(coff_compute_section_file_positions
,(abfd
),
1199 asection
*previous
= (asection
*)NULL
;
1200 file_ptr sofar
= FILHSZ
;
1204 if (bfd_get_start_address(abfd
))
1206 /* A start address may have been added to the original file. In this
1207 case it will need an optional header to record it. */
1208 abfd
->flags
|= EXEC_P
;
1211 if (abfd
->flags
& EXEC_P
)
1214 sofar
+= abfd
->section_count
* SCNHSZ
;
1215 for (current
= abfd
->sections
;
1216 current
!= (asection
*)NULL
;
1217 current
= current
->next
) {
1219 /* Only deal with sections which have contents */
1220 if (!(current
->flags
& SEC_HAS_CONTENTS
))
1223 /* Align the sections in the file to the same boundary on
1224 which they are aligned in virtual memory. I960 doesn't
1225 do this (FIXME) so we can stay in sync with Intel. 960
1226 doesn't yet page from files... */
1229 /* make sure this section is aligned on the right boundary - by
1230 padding the previous section up if necessary */
1233 sofar
= BFD_ALIGN(sofar
, 1 << current
->alignment_power
);
1234 if (previous
!= (asection
*)NULL
) {
1235 previous
->_raw_size
+= sofar
- old_sofar
;
1240 /* FIXME, in demand paged files, the low order bits of the file
1241 offset must match the low order bits of the virtual address.
1242 "Low order" is apparently implementation defined. Add code
1243 here to round sofar up to match the virtual address. */
1245 current
->filepos
= sofar
;
1247 sofar
+= current
->_raw_size
;
1249 /* make sure that this section is of the right size too */
1251 sofar
= BFD_ALIGN(sofar
, 1 << current
->alignment_power
);
1252 current
->_raw_size
+= sofar
- old_sofar
;
1256 /* Force .lib sections to start at zero. The vma is then
1257 incremented in coff_set_section_contents. This is right for
1259 if (strcmp (current
->name
, _LIB
) == 0)
1260 bfd_set_section_vma (abfd
, current
, 0);
1265 obj_relocbase(abfd
) = sofar
;
1268 /* If .file, .text, .data, .bss symbols are missing, add them. */
1269 /* @@ Should we only be adding missing symbols, or overriding the aux
1270 values for existing section symbols? */
1272 coff_add_missing_symbols (abfd
)
1275 unsigned int nsyms
= bfd_get_symcount (abfd
);
1276 asymbol
**sympp
= abfd
->outsymbols
;
1279 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
1281 for (i
= 0; i
< nsyms
; i
++)
1283 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
1287 /* only do this if there is a coff representation of the input
1289 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
1294 name
= csym
->symbol
.name
;
1297 if (!strcmp (name
, _TEXT
))
1299 else if (!strcmp (name
, _DATA
))
1301 else if (!strcmp (name
, _BSS
))
1305 /* Now i == bfd_get_symcount (abfd). */
1306 /* @@ For now, don't deal with .file symbol. */
1309 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
1311 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
1312 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
1313 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
1316 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1320 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
1322 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
1324 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
1325 BFD_ASSERT (i
== nsyms
);
1326 bfd_set_symtab (abfd
, sympp2
, nsyms
);
1332 DEFUN(coff_write_object_contents
,(abfd
),
1338 boolean hasrelocs
= false;
1339 boolean haslinno
= false;
1340 file_ptr reloc_base
;
1341 file_ptr lineno_base
;
1345 unsigned long reloc_size
= 0;
1346 unsigned long lnno_size
= 0;
1347 asection
*text_sec
= NULL
;
1348 asection
*data_sec
= NULL
;
1349 asection
*bss_sec
= NULL
;
1351 struct internal_filehdr internal_f
;
1352 struct internal_aouthdr internal_a
;
1355 bfd_error
= system_call_error
;
1356 /* Number the output sections, starting from one on the first section
1357 with a name which doesn't start with a *.
1358 @@ The code doesn't make this check. Is it supposed to be done,
1361 for (current
= abfd
->sections
; current
!= (asection
*)NULL
;
1362 current
= current
->next
)
1364 current
->target_index
= count
;
1368 if(abfd
->output_has_begun
== false) {
1369 coff_compute_section_file_positions(abfd
);
1372 if (abfd
->sections
!= (asection
*)NULL
) {
1373 scn_base
= abfd
->sections
->filepos
;
1378 if (bfd_seek(abfd
, scn_base
, SEEK_SET
) != 0)
1380 reloc_base
= obj_relocbase(abfd
);
1382 /* Make a pass through the symbol table to count line number entries and
1383 put them into the correct asections */
1385 lnno_size
= coff_count_linenumbers(abfd
) * LINESZ
;
1386 data_base
= scn_base
;
1388 /* Work out the size of the reloc and linno areas */
1390 for (current
= abfd
->sections
; current
!= NULL
; current
=
1393 /* We give section headers to +ve indexes */
1394 if (current
->target_index
> 0)
1397 reloc_size
+= current
->reloc_count
* RELSZ
;
1398 data_base
+= SCNHSZ
;
1403 lineno_base
= reloc_base
+ reloc_size
;
1404 sym_base
= lineno_base
+ lnno_size
;
1406 /* Indicate in each section->line_filepos its actual file address */
1407 for (current
= abfd
->sections
; current
!= NULL
; current
=
1410 if (current
->target_index
> 0)
1413 if (current
->lineno_count
) {
1414 current
->line_filepos
= lineno_base
;
1415 current
->moving_line_filepos
= lineno_base
;
1416 lineno_base
+= current
->lineno_count
* LINESZ
;
1419 current
->line_filepos
= 0;
1421 if (current
->reloc_count
) {
1422 current
->rel_filepos
= reloc_base
;
1423 reloc_base
+= current
->reloc_count
* RELSZ
;
1426 current
->rel_filepos
= 0;
1433 /* Write section headers to the file. */
1434 internal_f
.f_nscns
= 0;
1436 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1437 (FILHSZ
+ AOUTSZ
) : FILHSZ
),
1442 unsigned int pad
= abfd
->flags
& D_PAGED
? data_base
: 0;
1444 unsigned int pad
= 0;
1446 for (current
= abfd
->sections
;
1448 current
= current
->next
) {
1449 struct internal_scnhdr section
;
1450 if (current
->target_index
> 0)
1452 internal_f
.f_nscns
++;
1453 strncpy(&(section
.s_name
[0]), current
->name
, 8);
1455 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1456 Ian Taylor <ian@cygnus.com>. */
1457 if (strcmp (current
->name
, _LIB
) == 0)
1458 section
.s_vaddr
= 0;
1461 section
.s_vaddr
= current
->lma
+ pad
;
1462 section
.s_paddr
= current
->lma
+ pad
;
1463 section
.s_size
= current
->_raw_size
- pad
;
1465 If this section has no size or is unloadable then the scnptr
1468 if (current
->_raw_size
- pad
== 0 ||
1469 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0) {
1470 section
.s_scnptr
= 0;
1473 section
.s_scnptr
= current
->filepos
;
1475 section
.s_relptr
= current
->rel_filepos
;
1476 section
.s_lnnoptr
= current
->line_filepos
;
1477 section
.s_nreloc
= current
->reloc_count
;
1478 section
.s_nlnno
= current
->lineno_count
;
1479 if (current
->reloc_count
!= 0)
1481 if (current
->lineno_count
!= 0)
1484 section
.s_flags
= sec_to_styp_flags(current
->name
,current
->flags
);
1486 if (!strcmp(current
->name
, _TEXT
)) {
1488 } else if (!strcmp(current
->name
, _DATA
)) {
1490 #ifdef TWO_DATA_SECS
1491 } else if (!strcmp(current
->name
, ".data2")) {
1493 #endif /* TWO_DATA_SECS */
1494 } else if (!strcmp(current
->name
, _BSS
)) {
1499 section
.s_align
= (current
->alignment_power
1500 ? 1 << current
->alignment_power
1507 coff_swap_scnhdr_out(abfd
, §ion
, &buff
);
1508 bfd_write((PTR
) (&buff
), 1, SCNHSZ
, abfd
);
1518 /* OK, now set up the filehdr... */
1520 /* Don't include the internal abs section in the section count */
1523 We will NOT put a fucking timestamp in the header here. Every time you
1524 put it back, I will come in and take it out again. I'm sorry. This
1525 field does not belong here. We fill it with a 0 so it compares the
1526 same but is not a reasonable time. -- gnu@cygnus.com
1528 internal_f
.f_timdat
= 0;
1530 if (bfd_get_symcount(abfd
) != 0)
1531 internal_f
.f_symptr
= sym_base
;
1533 internal_f
.f_symptr
= 0;
1535 internal_f
.f_flags
= 0;
1537 if (abfd
->flags
& EXEC_P
)
1538 internal_f
.f_opthdr
= AOUTSZ
;
1540 internal_f
.f_opthdr
= 0;
1543 internal_f
.f_flags
|= F_RELFLG
;
1545 internal_f
.f_flags
|= F_LNNO
;
1546 if (0 == bfd_get_symcount(abfd
))
1547 internal_f
.f_flags
|= F_LSYMS
;
1548 if (abfd
->flags
& EXEC_P
)
1549 internal_f
.f_flags
|= F_EXEC
;
1551 if (!abfd
->xvec
->byteorder_big_p
)
1552 internal_f
.f_flags
|= F_AR32WR
;
1554 internal_f
.f_flags
|= F_AR32W
;
1557 FIXME, should do something about the other byte orders and
1561 /* Set up architecture-dependent stuff */
1563 { unsigned int magic
= 0;
1564 unsigned short flags
= 0;
1565 coff_set_flags(abfd
, &magic
, &flags
);
1566 internal_f
.f_magic
= magic
;
1567 internal_f
.f_flags
|= flags
;
1568 /* ...and the "opt"hdr... */
1571 # ifdef ULTRA3 /* NYU's machine */
1572 /* FIXME: This is a bogus check. I really want to see if there
1573 * is a .shbss or a .shdata section, if so then set the magic
1574 * number to indicate a shared data executable.
1576 if (internal_f
.f_nscns
>= 7)
1577 internal_a
.magic
= SHMAGIC
; /* Shared magic */
1579 # endif /* ULTRA3 */
1580 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
1581 #define __A_MAGIC_SET__
1584 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
1585 #define __A_MAGIC_SET__
1588 #define __A_MAGIC_SET__
1589 internal_a
.magic
= PAGEMAGICBCS
;
1593 #define __A_MAGIC_SET__
1594 /* Never was anything here for the 68k */
1595 #endif /* M68 || WE32K */
1598 # define __A_MAGIC_SET__
1599 internal_a
.magic
= ZMAGIC
;
1603 #define __A_MAGIC_SET__
1604 internal_a
.magic
= (abfd
->flags
& D_PAGED
)? RS6K_AOUTHDR_ZMAGIC
:
1605 (abfd
->flags
& WP_TEXT
)? RS6K_AOUTHDR_NMAGIC
:
1606 RS6K_AOUTHDR_OMAGIC
;
1609 #ifndef __A_MAGIC_SET__
1610 # include "Your aouthdr magic number is not being set!"
1612 # undef __A_MAGIC_SET__
1615 /* Now should write relocs, strings, syms */
1616 obj_sym_filepos(abfd
) = sym_base
;
1618 if (bfd_get_symcount(abfd
) != 0) {
1619 coff_add_missing_symbols (abfd
);
1620 coff_renumber_symbols(abfd
);
1621 coff_mangle_symbols(abfd
);
1622 coff_write_symbols(abfd
);
1623 coff_write_linenumbers(abfd
);
1624 coff_write_relocs(abfd
);
1627 internal_a
.tsize
= bfd_get_section_size_before_reloc(text_sec
);
1628 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
1631 internal_a
.dsize
= bfd_get_section_size_before_reloc(data_sec
);
1632 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
1635 internal_a
.bsize
= bfd_get_section_size_before_reloc(bss_sec
);
1638 internal_a
.entry
= bfd_get_start_address(abfd
);
1639 internal_f
.f_nsyms
= bfd_get_symcount(abfd
);
1641 /* now write them */
1642 if (bfd_seek(abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
1646 coff_swap_filehdr_out(abfd
, (PTR
)&internal_f
, (PTR
)&buff
);
1647 bfd_write((PTR
) &buff
, 1, FILHSZ
, abfd
);
1649 if (abfd
->flags
& EXEC_P
) {
1651 coff_swap_aouthdr_out(abfd
, (PTR
)&internal_a
, (PTR
)&buff
);
1652 bfd_write((PTR
) &buff
, 1, AOUTSZ
, abfd
);
1658 DEFUN(coff_set_section_contents
,(abfd
, section
, location
, offset
, count
),
1663 bfd_size_type count
)
1665 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
1666 coff_compute_section_file_positions(abfd
);
1669 /* If this is a .lib section, bump the vma address so that it
1670 winds up being the number of .lib sections output. This is
1671 right for SVR3.2. Shared libraries should probably get more
1672 generic support. Ian Taylor <ian@cygnus.com>. */
1673 if (strcmp (section
->name
, _LIB
) == 0)
1677 /* Don't write out bss sections - one way to do this is to
1678 see if the filepos has not been set. */
1679 if (section
->filepos
== 0)
1682 bfd_seek(abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
);
1685 return (bfd_write(location
, 1, count
, abfd
) == count
) ? true : false;
1691 coff_close_and_cleanup(abfd
)
1694 if (!bfd_read_p(abfd
))
1695 switch (abfd
->format
) {
1697 if (!_bfd_write_archive_contents(abfd
))
1701 if (!coff_write_object_contents(abfd
))
1705 bfd_error
= invalid_operation
;
1709 /* We depend on bfd_close to free all the memory on the obstack. */
1710 /* FIXME if bfd_release is not using obstacks! */
1717 buy_and_read(abfd
, where
, seek_direction
, size
)
1723 PTR area
= (PTR
) bfd_alloc(abfd
, size
);
1725 bfd_error
= no_memory
;
1728 bfd_seek(abfd
, where
, seek_direction
);
1729 if (bfd_read(area
, 1, size
, abfd
) != size
) {
1730 bfd_error
= system_call_error
;
1734 } /* buy_and_read() */
1740 Creating the linenumber table is done by reading in the entire
1741 coff linenumber table, and creating another table for internal use.
1743 A coff line number table is structured so that each function
1744 is marked as having a line number of 0. Each line within the
1745 function is an offset from the first line in the function. The
1746 base of the line number information for the table is stored in
1747 the symbol associated with the function.
1749 The information is copied from the external to the internal
1750 table, and each symbol which marks a function is marked by
1753 How does this work ?
1758 coff_slurp_line_table(abfd
, asect
)
1762 LINENO
*native_lineno
;
1763 alent
*lineno_cache
;
1765 BFD_ASSERT(asect
->lineno
== (alent
*) NULL
);
1767 native_lineno
= (LINENO
*) buy_and_read(abfd
,
1768 asect
->line_filepos
,
1771 asect
->lineno_count
));
1773 (alent
*) bfd_alloc(abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof(alent
)));
1774 if (lineno_cache
== NULL
) {
1775 bfd_error
= no_memory
;
1778 unsigned int counter
= 0;
1779 alent
*cache_ptr
= lineno_cache
;
1780 LINENO
*src
= native_lineno
;
1782 while (counter
< asect
->lineno_count
) {
1783 struct internal_lineno dst
;
1784 coff_swap_lineno_in(abfd
, src
, &dst
);
1785 cache_ptr
->line_number
= dst
.l_lnno
;
1787 if (cache_ptr
->line_number
== 0) {
1788 coff_symbol_type
*sym
=
1789 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
1790 + obj_raw_syments(abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
1791 cache_ptr
->u
.sym
= (asymbol
*) sym
;
1792 sym
->lineno
= cache_ptr
;
1795 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
1796 - bfd_section_vma(abfd
, asect
);
1797 } /* If no linenumber expect a symbol index */
1803 cache_ptr
->line_number
= 0;
1806 asect
->lineno
= lineno_cache
;
1807 /* FIXME, free native_lineno here, or use alloca or something. */
1809 } /* coff_slurp_line_table() */
1812 DEFUN(coff_slurp_symbol_table
,(abfd
),
1815 combined_entry_type
*native_symbols
;
1816 coff_symbol_type
*cached_area
;
1817 unsigned int *table_ptr
;
1819 unsigned int number_of_symbols
= 0;
1820 if (obj_symbols(abfd
))
1822 bfd_seek(abfd
, obj_sym_filepos(abfd
), SEEK_SET
);
1824 /* Read in the symbol table */
1825 if ((native_symbols
= coff_get_normalized_symtab(abfd
)) == NULL
) {
1829 /* Allocate enough room for all the symbols in cached form */
1831 (coff_symbol_type
*)
1832 bfd_alloc(abfd
, (size_t) (bfd_get_symcount(abfd
) * sizeof(coff_symbol_type
)));
1834 if (cached_area
== NULL
) {
1835 bfd_error
= no_memory
;
1840 bfd_alloc(abfd
, (size_t) (bfd_get_symcount(abfd
) * sizeof(unsigned int)));
1842 if (table_ptr
== NULL
) {
1843 bfd_error
= no_memory
;
1848 coff_symbol_type
*dst
= cached_area
;
1849 unsigned int last_native_index
= bfd_get_symcount(abfd
);
1850 unsigned int this_index
= 0;
1851 while (this_index
< last_native_index
) {
1852 combined_entry_type
*src
= native_symbols
+ this_index
;
1853 table_ptr
[this_index
] = number_of_symbols
;
1854 dst
->symbol
.the_bfd
= abfd
;
1856 dst
->symbol
.name
= (char *)(src
->u
.syment
._n
._n_n
._n_offset
);
1858 We use the native name field to point to the cached field
1860 src
->u
.syment
._n
._n_n
._n_zeroes
= (int) dst
;
1861 dst
->symbol
.section
= coff_section_from_bfd_index(abfd
,
1862 src
->u
.syment
.n_scnum
);
1863 dst
->symbol
.flags
= 0;
1864 dst
->done_lineno
= false;
1866 switch (src
->u
.syment
.n_sclass
) {
1870 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
1871 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
1872 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
1874 /* Fall through to next case */
1882 if ((src
->u
.syment
.n_scnum
) == 0) {
1883 if ((src
->u
.syment
.n_value
) == 0) {
1884 dst
->symbol
.section
= &bfd_und_section
;
1885 dst
->symbol
.value
= 0;
1888 dst
->symbol
.section
= &bfd_com_section
;
1889 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
1894 Base the value as an index from the base of the
1898 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
1899 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
1901 if (ISFCN((src
->u
.syment
.n_type
))) {
1903 A function ext does not go at the end of a file
1905 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
1912 case C_STAT
: /* static */
1914 case C_LEAFSTAT
: /* static leaf procedure */
1916 case C_LABEL
: /* label */
1917 if (src
->u
.syment
.n_scnum
== -2)
1918 dst
->symbol
.flags
= BSF_DEBUGGING
;
1920 dst
->symbol
.flags
= BSF_LOCAL
;
1922 Base the value as an index from the base of the section, if
1925 if (dst
->symbol
.section
)
1926 dst
->symbol
.value
= (src
->u
.syment
.n_value
) -
1927 dst
->symbol
.section
->vma
;
1929 dst
->symbol
.value
= (src
->u
.syment
.n_value
) ;
1932 case C_MOS
: /* member of structure */
1933 case C_EOS
: /* end of structure */
1934 #ifdef NOTDEF /* C_AUTOARG has the same value */
1936 case C_GLBLREG
: /* A29k-specific storage class */
1939 case C_REGPARM
: /* register parameter */
1940 case C_REG
: /* register variable */
1942 case C_AUTOARG
: /* 960-specific storage class */
1944 case C_TPDEF
: /* type definition */
1946 case C_AUTO
: /* automatic variable */
1947 case C_FIELD
: /* bit field */
1948 case C_ENTAG
: /* enumeration tag */
1949 case C_MOE
: /* member of enumeration */
1950 case C_MOU
: /* member of union */
1951 case C_UNTAG
: /* union tag */
1952 dst
->symbol
.flags
= BSF_DEBUGGING
;
1953 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
1956 case C_FILE
: /* file name */
1957 case C_STRTAG
: /* structure tag */
1959 case C_BINCL
: /* beginning of include file */
1960 case C_EINCL
: /* ending of include file */
1973 dst
->symbol
.flags
= BSF_DEBUGGING
;
1974 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
1977 case C_BLOCK
: /* ".bb" or ".eb" */
1978 case C_FCN
: /* ".bf" or ".ef" */
1979 case C_EFCN
: /* physical end of function */
1980 dst
->symbol
.flags
= BSF_LOCAL
;
1982 Base the value as an index from the base of the section
1984 dst
->symbol
.value
= (src
->u
.syment
.n_value
) - dst
->symbol
.section
->vma
;
1988 case C_EXTDEF
: /* external definition */
1989 case C_ULABEL
: /* undefined label */
1990 case C_USTATIC
: /* undefined static */
1991 case C_LINE
: /* line # reformatted as symbol table entry */
1992 case C_ALIAS
: /* duplicate tag */
1993 case C_HIDDEN
: /* ext symbol in dmert public lib */
1996 fprintf(stderr
,"Unrecognized storage class %d\n",
1997 src
->u
.syment
.n_sclass
);
1999 dst
->symbol
.flags
= BSF_DEBUGGING
;
2000 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
2004 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2008 dst
->symbol
.udata
= 0;
2009 dst
->lineno
= (alent
*) NULL
;
2010 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
2012 number_of_symbols
++;
2013 } /* walk the native symtab */
2014 } /* bfdize the native symtab */
2016 obj_symbols(abfd
) = cached_area
;
2017 obj_raw_syments(abfd
) = native_symbols
;
2019 obj_conv_table_size (abfd
) = bfd_get_symcount (abfd
);
2020 bfd_get_symcount(abfd
) = number_of_symbols
;
2021 obj_convert(abfd
) = table_ptr
;
2022 /* Slurp the line tables for each section too */
2027 coff_slurp_line_table(abfd
, p
);
2032 } /* coff_slurp_symbol_table() */
2038 Coff relocations are easily transformed into the internal BFD form
2041 Reading a coff relocation table is done in the following stages:
2043 o The entire coff relocation table is read into memory.
2045 o Each relocation is processed in turn, first it is swapped from the
2046 external to the internal form.
2048 o The symbol referenced in the relocation's symbol index is
2049 turned intoa pointer into the canonical symbol table. Note
2050 that this table is the same as the one returned by a call to
2051 @code{bfd_canonicalize_symtab}. The back end will call the
2052 routine and save the result if a canonicalization hasn't been done.
2054 o The reloc index is turned into a pointer to a howto
2055 structure, in a back end specific way. For instance, the 386
2056 and 960 use the @code{r_type} to directly produce an index
2057 into a howto table vector; the 88k subtracts a number from the
2058 @code{r_type} field and creates an addend field.
2064 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2065 if (ptr && bfd_asymbol_bfd(ptr) == abfd \
2066 && ((ptr->flags & BSF_OLD_COMMON)== 0)) \
2068 cache_ptr->addend = -(ptr->section->vma + ptr->value); \
2071 cache_ptr->addend = 0; \
2076 DEFUN(coff_slurp_reloc_table
,(abfd
, asect
, symbols
),
2081 RELOC
*native_relocs
;
2082 arelent
*reloc_cache
;
2087 if (asect
->relocation
)
2089 if (asect
->reloc_count
== 0)
2091 if (asect
->flags
& SEC_CONSTRUCTOR
)
2093 if (!coff_slurp_symbol_table(abfd
))
2096 (RELOC
*) buy_and_read(abfd
,
2100 asect
->reloc_count
));
2101 reloc_cache
= (arelent
*)
2102 bfd_alloc(abfd
, (size_t) (asect
->reloc_count
* sizeof(arelent
)));
2104 if (reloc_cache
== NULL
) {
2105 bfd_error
= no_memory
;
2110 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2112 #ifdef RELOC_PROCESSING
2113 struct internal_reloc dst
;
2114 struct external_reloc
*src
;
2116 cache_ptr
= reloc_cache
+ idx
;
2117 src
= native_relocs
+ idx
;
2118 bfd_swap_reloc_in(abfd
, src
, &dst
);
2120 RELOC_PROCESSING(cache_ptr
, &dst
, symbols
, abfd
, asect
);
2122 struct internal_reloc dst
;
2124 struct external_reloc
*src
;
2126 cache_ptr
= reloc_cache
+ idx
;
2127 src
= native_relocs
+ idx
;
2129 bfd_swap_reloc_in(abfd
, src
, &dst
);
2132 cache_ptr
->address
= dst
.r_vaddr
;
2134 if (dst
.r_symndx
!= -1)
2136 /* @@ Should never be greater than count of symbols! */
2137 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
2139 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert(abfd
)[dst
.r_symndx
];
2140 ptr
= *(cache_ptr
->sym_ptr_ptr
);
2144 cache_ptr
->sym_ptr_ptr
= bfd_abs_section
.symbol_ptr_ptr
;
2149 The symbols definitions that we have read in have been
2150 relocated as if their sections started at 0. But the offsets
2151 refering to the symbols in the raw data have not been
2152 modified, so we have to have a negative addend to compensate.
2154 Note that symbols which used to be common must be left alone */
2156 /* Calculate any reloc addend by looking at the symbol */
2157 CALC_ADDEND(abfd
, ptr
, dst
, cache_ptr
);
2159 cache_ptr
->address
-= asect
->vma
;
2160 /* !! cache_ptr->section = (asection *) NULL;*/
2162 /* Fill in the cache_ptr->howto field from dst.r_type */
2163 RTYPE2HOWTO(cache_ptr
, &dst
);
2168 asect
->relocation
= reloc_cache
;
2173 /* This is stupid. This function should be a boolean predicate */
2175 DEFUN(coff_canonicalize_reloc
, (abfd
, section
, relptr
, symbols
),
2178 arelent
**relptr AND
2181 arelent
*tblptr
= section
->relocation
;
2182 unsigned int count
= 0;
2185 if (section
->flags
& SEC_CONSTRUCTOR
)
2187 /* this section has relocs made up by us, they are not in the
2188 file, so take them out of their chain and place them into
2189 the data area provided */
2190 arelent_chain
*chain
= section
->constructor_chain
;
2191 for (count
= 0; count
< section
->reloc_count
; count
++)
2193 *relptr
++ = &chain
->relent
;
2194 chain
= chain
->next
;
2200 coff_slurp_reloc_table(abfd
, section
, symbols
);
2203 tblptr
= section
->relocation
;
2207 for (; count
++ < section
->reloc_count
;)
2208 *relptr
++ = tblptr
++;
2213 return section
->reloc_count
;
2218 coff_sym_filepos(abfd
)
2221 return obj_sym_filepos(abfd
);
2225 #ifndef coff_reloc16_extra_cases
2226 #define coff_reloc16_extra_cases \
2227 (void (*) PARAMS ((bfd *, bfd_seclet_type *, arelent *, bfd_byte *,\
2228 unsigned int *, unsigned int *))) abort
2231 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
= {
2232 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
2233 coff_swap_aux_out
, coff_swap_sym_out
,
2234 coff_swap_lineno_out
, coff_swap_reloc_out
,
2235 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
2236 coff_swap_scnhdr_out
,
2237 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, LINESZ
,
2238 #ifdef COFF_LONG_FILENAMES
2243 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
2244 coff_bad_format_hook
, coff_set_arch_mach_hook
, coff_mkobject_hook
,
2245 styp_to_sec_flags
, coff_make_section_hook
, coff_set_alignment_hook
,
2246 coff_slurp_symbol_table
, symname_in_debug_hook
, coff_reloc16_extra_cases
2249 #define coff_core_file_failing_command _bfd_dummy_core_file_failing_command
2250 #define coff_core_file_failing_signal _bfd_dummy_core_file_failing_signal
2251 #define coff_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
2252 #define coff_slurp_armap bfd_slurp_coff_armap
2253 #define coff_slurp_extended_name_table _bfd_slurp_extended_name_table
2254 #define coff_truncate_arname bfd_dont_truncate_arname
2255 #define coff_openr_next_archived_file bfd_generic_openr_next_archived_file
2256 #define coff_generic_stat_arch_elt bfd_generic_stat_arch_elt
2257 #define coff_get_section_contents bfd_generic_get_section_contents
2258 #define coff_close_and_cleanup bfd_generic_close_and_cleanup
2260 #define coff_bfd_debug_info_start bfd_void
2261 #define coff_bfd_debug_info_end bfd_void
2262 #define coff_bfd_debug_info_accumulate \
2263 (void (*) PARAMS ((bfd *, struct sec *))) bfd_void
2264 #define coff_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
2265 #define coff_bfd_relax_section bfd_generic_relax_section
2266 #define coff_bfd_seclet_link bfd_generic_seclet_link
2267 #define coff_bfd_reloc_type_lookup \
2268 ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)