1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 1991, 1992 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 /* Try and figure out what it should be */
344 else if (sec_flags
& SEC_CODE
)
346 styp_flags
= STYP_TEXT
;
348 else if (sec_flags
& SEC_DATA
)
350 styp_flags
= STYP_DATA
;
352 else if (sec_flags
& SEC_READONLY
)
354 #ifdef STYP_LIT /* 29k readonly text/data section */
355 styp_flags
= STYP_LIT
;
357 styp_flags
= STYP_TEXT
;
358 #endif /* STYP_LIT */
360 else if (sec_flags
& SEC_LOAD
)
362 styp_flags
= STYP_TEXT
;
365 styp_flags
= STYP_BSS
;
369 if (sec_flags
& SEC_NEVER_LOAD
)
370 styp_flags
|= STYP_NOLOAD
;
376 * Return a word with SEC_* flags set to represent the incoming
377 * STYP_* flags (from scnhdr.s_flags). The inverse of this
378 * function is sec_to_styp_flags().
379 * NOTE: If you add to/change this routine, you should mirror the changes
380 * in sec_to_styp_flags().
383 DEFUN(styp_to_sec_flags
, (abfd
, hdr
),
387 struct internal_scnhdr
*internal_s
= (struct internal_scnhdr
*) hdr
;
388 long styp_flags
= internal_s
->s_flags
;
389 flagword sec_flags
=0;
392 if (styp_flags
& STYP_NOLOAD
)
394 sec_flags
|= SEC_NEVER_LOAD
;
396 #endif /* STYP_NOLOAD */
398 /* For 386 COFF, at least, an unloadable text or data section is
399 actually a shared library section. */
400 if (styp_flags
& STYP_TEXT
)
402 if (sec_flags
& SEC_NEVER_LOAD
)
403 sec_flags
|= SEC_CODE
| SEC_SHARED_LIBRARY
;
405 sec_flags
|= SEC_CODE
| SEC_LOAD
| SEC_ALLOC
;
407 else if (styp_flags
& STYP_DATA
)
409 if (sec_flags
& SEC_NEVER_LOAD
)
410 sec_flags
|= SEC_DATA
| SEC_SHARED_LIBRARY
;
412 sec_flags
|= SEC_DATA
| SEC_LOAD
| SEC_ALLOC
;
414 else if (styp_flags
& STYP_BSS
)
416 sec_flags
|= SEC_ALLOC
;
418 else if (styp_flags
& STYP_INFO
)
420 sec_flags
|= SEC_NEVER_LOAD
;
424 sec_flags
|= SEC_ALLOC
| SEC_LOAD
;
427 #ifdef STYP_LIT /* A29k readonly text/data section type */
428 if ((styp_flags
& STYP_LIT
) == STYP_LIT
)
430 sec_flags
= (SEC_LOAD
| SEC_ALLOC
| SEC_READONLY
);
432 #endif /* STYP_LIT */
433 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
434 if (styp_flags
& STYP_OTHER_LOAD
)
436 sec_flags
= (SEC_LOAD
| SEC_ALLOC
);
438 #endif /* STYP_SDATA */
443 #define get_index(symbol) ((int) (symbol)->udata)
447 bfd_coff_backend_data
451 Special entry points for gdb to swap in coff symbol table parts
454 . void (*_bfd_coff_swap_aux_in) PARAMS ((
461 . void (*_bfd_coff_swap_sym_in) PARAMS ((
466 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
472 Special entry points for gas to swap coff parts
474 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
481 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
486 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
491 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
496 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
501 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
506 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
512 Special entry points for generic COFF routines to call target
513 dependent COFF routines
515 . unsigned int _bfd_filhsz;
516 . unsigned int _bfd_aoutsz;
517 . unsigned int _bfd_scnhsz;
518 . unsigned int _bfd_symesz;
519 . unsigned int _bfd_auxesz;
520 . unsigned int _bfd_linesz;
521 . boolean _bfd_coff_long_filenames;
522 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
526 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
530 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
534 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
536 . PTR internal_filehdr));
537 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
539 . PTR internal_filehdr));
540 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
542 . PTR internal_filehdr));
543 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
545 . PTR internal_scnhdr));
546 . asection *(*_bfd_make_section_hook) PARAMS ((
549 . void (*_bfd_set_alignment_hook) PARAMS ((
552 . PTR internal_scnhdr));
553 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
555 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
557 . struct internal_syment *sym));
558 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
560 . struct bfd_seclet *seclet,
563 . unsigned int *src_ptr,
564 . unsigned int *dst_ptr));
565 .} bfd_coff_backend_data;
567 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
569 .#define bfd_coff_swap_aux_in(a,e,t,c,i) \
570 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,i))
572 .#define bfd_coff_swap_sym_in(a,e,i) \
573 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
575 .#define bfd_coff_swap_lineno_in(a,e,i) \
576 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
578 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
579 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
581 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
582 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
584 .#define bfd_coff_swap_aux_out(abfd, i, t,c,o) \
585 . ((coff_backend_info (abfd)->_bfd_coff_swap_aux_out) (abfd, i,t,c, o))
587 .#define bfd_coff_swap_sym_out(abfd, i,o) \
588 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
590 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
591 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
593 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
594 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
596 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
597 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
599 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
600 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
601 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
602 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
603 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
604 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
605 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
606 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
607 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
609 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
610 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
612 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
613 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
615 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
616 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
618 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
619 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
620 .#define bfd_coff_mkobject_hook(abfd, filehdr)\
621 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr))
623 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr)\
624 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr))
626 .#define bfd_coff_make_section_hook(abfd, name)\
627 . ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
629 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
630 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
632 .#define bfd_coff_slurp_symbol_table(abfd)\
633 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
635 .#define bfd_coff_symname_in_debug(abfd, sym)\
636 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
638 .#define bfd_coff_reloc16_extra_cases(abfd, seclet, reloc, data, src_ptr, dst_ptr)\
639 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
640 . (abfd, seclet, reloc, data, src_ptr, dst_ptr))
644 /* See whether the magic number matches. */
647 DEFUN(coff_bad_format_hook
, (abfd
, filehdr
),
651 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
653 if (BADMAG (*internal_f
))
656 /* if the optional header is NULL or not the correct size then
657 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
658 and Intel 960 readwrite headers (I960WRMAGIC) is that the
659 optional header is of a different size.
661 But the mips keeps extra stuff in it's opthdr, so dont check
665 #if defined(M88) || defined(I960)
666 if (internal_f
->f_opthdr
!= 0 && AOUTSZ
!= internal_f
->f_opthdr
)
674 DEFUN (coff_make_section_hook
, (abfd
, name
),
679 /* On SCO a file created by the Microsoft assembler can have two
680 .data sections. We use .data2 for the second one. */
681 if (strcmp (name
, _DATA
) == 0)
682 return bfd_make_section (abfd
, ".data2");
684 return (asection
*) NULL
;
688 initialize a section structure with information peculiar to this
689 particular implementation of coff
693 DEFUN(coff_new_section_hook
,(abfd
, section
),
697 section
->alignment_power
= abfd
->xvec
->align_power_min
;
698 /* Allocate aux records for section symbols, to store size and
701 @@ Shouldn't use constant multiplier here! */
702 coffsymbol (section
->symbol
)->native
=
703 (combined_entry_type
*) bfd_zalloc (abfd
,
704 sizeof (combined_entry_type
) * 10);
711 /* Set the alignment of a BFD section. */
714 DEFUN (coff_set_alignment_hook
, (abfd
, section
, scnhdr
),
716 asection
*section AND
719 struct internal_scnhdr
*hdr
= (struct internal_scnhdr
*) scnhdr
;
722 for (i
= 0; i
< 32; i
++)
723 if ((1 << i
) >= hdr
->s_align
)
725 section
->alignment_power
= i
;
730 #define coff_set_alignment_hook \
731 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
736 DEFUN(coff_mkobject
,(abfd
),
739 coff_data_type
*coff
;
741 abfd
->tdata
.coff_obj_data
= (struct coff_tdata
*)bfd_zalloc (abfd
,sizeof(coff_data_type
));
742 if (abfd
->tdata
.coff_obj_data
== 0){
743 bfd_error
= no_memory
;
746 coff
= coff_data (abfd
);
747 coff
->symbols
= (coff_symbol_type
*) NULL
;
748 coff
->conversion_table
= (unsigned int *) NULL
;
749 coff
->raw_syments
= (struct coff_ptr_struct
*) NULL
;
750 coff
->raw_linenos
= (struct lineno
*) NULL
;
752 /* make_abs_section(abfd);*/
756 /* Create the COFF backend specific information. */
759 DEFUN(coff_mkobject_hook
,(abfd
, filehdr
),
763 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
764 coff_data_type
*coff
;
766 if (coff_mkobject (abfd
) == false)
769 coff
= coff_data (abfd
);
771 coff
->sym_filepos
= internal_f
->f_symptr
;
772 coff
->flags
= internal_f
->f_flags
;
774 /* These members communicate important constants about the symbol
775 table to GDB's symbol-reading code. These `constants'
776 unfortunately vary among coff implementations... */
777 coff
->local_n_btmask
= N_BTMASK
;
778 coff
->local_n_btshft
= N_BTSHFT
;
779 coff
->local_n_tmask
= N_TMASK
;
780 coff
->local_n_tshift
= N_TSHIFT
;
781 coff
->local_symesz
= SYMESZ
;
782 coff
->local_auxesz
= AUXESZ
;
783 coff
->local_linesz
= LINESZ
;
788 /* Determine the machine architecture and type. FIXME: This is target
789 dependent because the magic numbers are defined in the target
790 dependent header files. But there is no particular need for this.
791 If the magic numbers were moved to a separate file, this function
792 would be target independent and would also be much more successful
793 at linking together COFF files for different architectures. */
796 DEFUN (coff_set_arch_mach_hook
, (abfd
, filehdr
),
801 enum bfd_architecture arch
;
802 struct internal_filehdr
*internal_f
= (struct internal_filehdr
*) filehdr
;
805 switch (internal_f
->f_magic
) {
809 case I386AIXMAGIC
: /* Danbury PS/2 AIX C Compiler */
811 arch
= bfd_arch_i386
;
816 #ifdef A29K_MAGIC_BIG
818 case A29K_MAGIC_LITTLE
:
819 arch
= bfd_arch_a29k
;
828 arch
= bfd_arch_mips
;
836 arch
= bfd_arch_m68k
;
844 arch
= bfd_arch_m88k
;
851 switch (internal_f
->f_flags
& F_MACHMASK
)
854 machine
= bfd_mach_z8001
;
857 machine
= bfd_mach_z8002
;
868 arch
= bfd_arch_i960
;
869 switch (F_I960TYPE
& internal_f
->f_flags
)
873 machine
= bfd_mach_i960_core
;
876 machine
= bfd_mach_i960_kb_sb
;
879 machine
= bfd_mach_i960_mc
;
882 machine
= bfd_mach_i960_xa
;
885 machine
= bfd_mach_i960_ca
;
888 machine
= bfd_mach_i960_ka_sa
;
899 arch
= bfd_arch_rs6000
;
906 arch
= bfd_arch_we32k
;
913 arch
= bfd_arch_h8300
;
918 default: /* Unreadable input file type */
919 arch
= bfd_arch_obscure
;
923 bfd_default_set_arch_mach(abfd
, arch
, machine
);
927 #ifdef SYMNAME_IN_DEBUG
930 DEFUN (symname_in_debug_hook
, (abfd
, sym
),
932 struct internal_syment
*sym
)
934 return SYMNAME_IN_DEBUG (sym
) ? true : false;
939 #define symname_in_debug_hook \
940 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
948 To write relocations, all the back end does is step though the
949 canonical relocation table, and create an
950 @code{internal_reloc}. The symbol index to use is removed from
951 the @code{offset} field in the symbol table supplied, the
952 address comes directly from the sum of the section base
953 address and the relocation offset and the type is dug directly
954 from the howto field. Then the @code{internal_reloc} is
955 swapped into the shape of an @code{external_reloc} and written
961 DEFUN(coff_write_relocs
,(abfd
),
965 for (s
= abfd
->sections
; s
!= (asection
*) NULL
; s
= s
->next
) {
967 struct external_reloc dst
;
969 arelent
**p
= s
->orelocation
;
970 bfd_seek(abfd
, s
->rel_filepos
, SEEK_SET
);
971 for (i
= 0; i
< s
->reloc_count
; i
++) {
972 struct internal_reloc n
;
974 memset((PTR
)&n
, 0, sizeof(n
));
976 n
.r_vaddr
= q
->address
+ s
->vma
;
977 /* The 29k const/consth reloc pair is a real kludge - the consth
978 part doesn't have a symbol - it has an offset. So rebuilt
981 if (q
->howto
->type
== R_IHCONST
)
982 n
.r_symndx
= q
->addend
;
989 if (q
->sym_ptr_ptr
== bfd_abs_section
.symbol_ptr_ptr
)
991 /* This is a relocation relative to the absolute symbol */
996 n
.r_symndx
= get_index((*(q
->sym_ptr_ptr
)));
997 /* Take notice if the symbol reloc points to a symbol we don't have
998 in our symbol table. What should we do for this?? */
999 if (n
.r_symndx
> obj_conv_table_size (abfd
))
1007 /* Work out reloc type from what is required */
1008 SELECT_RELOC(n
.r_type
, q
->howto
);
1010 n
.r_type
= q
->howto
->type
;
1012 coff_swap_reloc_out(abfd
, &n
, &dst
);
1013 bfd_write((PTR
) &dst
, 1, RELSZ
, abfd
);
1018 /* Set flags and magic number of a coff file from architecture and machine
1019 type. Result is true if we can represent the arch&type, false if not. */
1022 DEFUN(coff_set_flags
,(abfd
, magicp
, flagsp
),
1024 unsigned *magicp AND
1025 unsigned short *flagsp
)
1027 switch (bfd_get_arch(abfd
)) {
1031 switch (bfd_get_mach(abfd
))
1033 case bfd_mach_z8001
:
1036 case bfd_mach_z8002
:
1050 *magicp
= I960ROMAGIC
;
1052 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1053 I960RWMAGIC); FIXME???
1055 switch (bfd_get_mach(abfd
)) {
1056 case bfd_mach_i960_core
:
1059 case bfd_mach_i960_kb_sb
:
1062 case bfd_mach_i960_mc
:
1065 case bfd_mach_i960_xa
:
1068 case bfd_mach_i960_ca
:
1071 case bfd_mach_i960_ka_sa
:
1084 *magicp
= MIPS_MAGIC_2
;
1090 *magicp
= I386MAGIC
;
1096 *magicp
= MC68MAGIC
;
1103 *magicp
= MC88OMAGIC
;
1108 case bfd_arch_h8300
:
1109 *magicp
= H8300MAGIC
;
1113 #ifdef A29K_MAGIC_BIG
1115 if (abfd
->xvec
->byteorder_big_p
)
1116 *magicp
= A29K_MAGIC_BIG
;
1118 *magicp
= A29K_MAGIC_LITTLE
;
1124 case bfd_arch_we32k
:
1125 *magicp
= WE32KMAGIC
;
1131 case bfd_arch_rs6000
:
1132 *magicp
= U802TOCMAGIC
;
1137 default: /* Unknown architecture */
1138 /* return false; -- fall through to "return false" below, to avoid
1139 "statement never reached" errors on the one below. */
1148 DEFUN(coff_set_arch_mach
,(abfd
, arch
, machine
),
1150 enum bfd_architecture arch AND
1151 unsigned long machine
)
1154 unsigned short dummy2
;
1155 bfd_default_set_arch_mach(abfd
, arch
, machine
);
1157 if (arch
!= bfd_arch_unknown
&&
1158 coff_set_flags(abfd
, &dummy1
, &dummy2
) != true)
1159 return false; /* We can't represent this type */
1160 return true; /* We're easy ... */
1164 /* Calculate the file position for each section. */
1167 DEFUN(coff_compute_section_file_positions
,(abfd
),
1171 asection
*previous
= (asection
*)NULL
;
1172 file_ptr sofar
= FILHSZ
;
1174 if (bfd_get_start_address(abfd
))
1176 /* A start address may have been added to the original file. In this
1177 case it will need an optional header to record it. */
1178 abfd
->flags
|= EXEC_P
;
1181 if (abfd
->flags
& EXEC_P
)
1184 sofar
+= abfd
->section_count
* SCNHSZ
;
1185 for (current
= abfd
->sections
;
1186 current
!= (asection
*)NULL
;
1187 current
= current
->next
) {
1189 /* Only deal with sections which have contents */
1190 if (!(current
->flags
& SEC_HAS_CONTENTS
))
1193 /* Align the sections in the file to the same boundary on
1194 which they are aligned in virtual memory. I960 doesn't
1195 do this (FIXME) so we can stay in sync with Intel. 960
1196 doesn't yet page from files... */
1199 /* make sure this section is aligned on the right boundary - by
1200 padding the previous section up if necessary */
1203 sofar
= BFD_ALIGN(sofar
, 1 << current
->alignment_power
);
1204 if (previous
!= (asection
*)NULL
) {
1205 previous
->_raw_size
+= sofar
- old_sofar
;
1210 /* FIXME, in demand paged files, the low order bits of the file
1211 offset must match the low order bits of the virtual address.
1212 "Low order" is apparently implementation defined. Add code
1213 here to round sofar up to match the virtual address. */
1215 current
->filepos
= sofar
;
1217 sofar
+= current
->_raw_size
;
1219 /* make sure that this section is of the right size too */
1221 sofar
= BFD_ALIGN(sofar
, 1 << current
->alignment_power
);
1222 current
->_raw_size
+= sofar
- old_sofar
;
1227 obj_relocbase(abfd
) = sofar
;
1230 /* If .file, .text, .data, .bss symbols are missing, add them. */
1231 /* @@ Should we only be adding missing symbols, or overriding the aux
1232 values for existing section symbols? */
1234 coff_add_missing_symbols (abfd
)
1237 unsigned int nsyms
= bfd_get_symcount (abfd
);
1238 asymbol
**sympp
= abfd
->outsymbols
;
1241 int need_text
= 1, need_data
= 1, need_bss
= 1, need_file
= 1;
1243 for (i
= 0; i
< nsyms
; i
++)
1245 coff_symbol_type
*csym
= coff_symbol_from (abfd
, sympp
[i
]);
1249 /* only do this if there is a coff representation of the input
1251 if (csym
->native
&& csym
->native
->u
.syment
.n_sclass
== C_FILE
)
1256 name
= csym
->symbol
.name
;
1259 if (!strcmp (name
, _TEXT
))
1261 else if (!strcmp (name
, _DATA
))
1263 else if (!strcmp (name
, _BSS
))
1267 /* Now i == bfd_get_symcount (abfd). */
1268 /* @@ For now, don't deal with .file symbol. */
1271 if (!need_text
&& !need_data
&& !need_bss
&& !need_file
)
1273 nsyms
+= need_text
+ need_data
+ need_bss
+ need_file
;
1274 sympp2
= (asymbol
**) bfd_alloc_by_size_t (abfd
, nsyms
* sizeof (asymbol
*));
1275 memcpy (sympp2
, sympp
, i
* sizeof (asymbol
*));
1278 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1282 sympp2
[i
++] = coff_section_symbol (abfd
, _TEXT
);
1284 sympp2
[i
++] = coff_section_symbol (abfd
, _DATA
);
1286 sympp2
[i
++] = coff_section_symbol (abfd
, _BSS
);
1287 BFD_ASSERT (i
== nsyms
);
1288 bfd_set_symtab (abfd
, sympp2
, nsyms
);
1294 DEFUN(coff_write_object_contents
,(abfd
),
1300 boolean hasrelocs
= false;
1301 boolean haslinno
= false;
1302 file_ptr reloc_base
;
1303 file_ptr lineno_base
;
1307 unsigned long reloc_size
= 0;
1308 unsigned long lnno_size
= 0;
1309 asection
*text_sec
= NULL
;
1310 asection
*data_sec
= NULL
;
1311 asection
*bss_sec
= NULL
;
1313 struct internal_filehdr internal_f
;
1314 struct internal_aouthdr internal_a
;
1317 bfd_error
= system_call_error
;
1318 /* Number the output sections, starting from one on the first section
1319 with a name which doesn't start with a *.
1320 @@ The code doesn't make this check. Is it supposed to be done,
1323 for (current
= abfd
->sections
; current
!= (asection
*)NULL
;
1324 current
= current
->next
)
1326 current
->target_index
= count
;
1330 if(abfd
->output_has_begun
== false) {
1331 coff_compute_section_file_positions(abfd
);
1334 if (abfd
->sections
!= (asection
*)NULL
) {
1335 scn_base
= abfd
->sections
->filepos
;
1340 if (bfd_seek(abfd
, scn_base
, SEEK_SET
) != 0)
1342 reloc_base
= obj_relocbase(abfd
);
1344 /* Make a pass through the symbol table to count line number entries and
1345 put them into the correct asections */
1347 coff_count_linenumbers(abfd
);
1348 data_base
= scn_base
;
1350 /* Work out the size of the reloc and linno areas */
1352 for (current
= abfd
->sections
; current
!= NULL
; current
=
1355 /* We give section headers to +ve indexes */
1356 if (current
->target_index
> 0)
1359 reloc_size
+= current
->reloc_count
* RELSZ
;
1360 lnno_size
+= current
->lineno_count
* LINESZ
;
1361 data_base
+= SCNHSZ
;
1366 lineno_base
= reloc_base
+ reloc_size
;
1367 sym_base
= lineno_base
+ lnno_size
;
1369 /* Indicate in each section->line_filepos its actual file address */
1370 for (current
= abfd
->sections
; current
!= NULL
; current
=
1373 if (current
->target_index
> 0)
1376 if (current
->lineno_count
) {
1377 current
->line_filepos
= lineno_base
;
1378 current
->moving_line_filepos
= lineno_base
;
1379 lineno_base
+= current
->lineno_count
* LINESZ
;
1382 current
->line_filepos
= 0;
1384 if (current
->reloc_count
) {
1385 current
->rel_filepos
= reloc_base
;
1386 reloc_base
+= current
->reloc_count
* RELSZ
;
1389 current
->rel_filepos
= 0;
1396 /* Write section headers to the file. */
1397 internal_f
.f_nscns
= 0;
1399 (file_ptr
) ((abfd
->flags
& EXEC_P
) ?
1400 (FILHSZ
+ AOUTSZ
) : FILHSZ
),
1405 unsigned int pad
= abfd
->flags
& D_PAGED
? data_base
: 0;
1407 unsigned int pad
= 0;
1409 for (current
= abfd
->sections
;
1411 current
= current
->next
) {
1412 struct internal_scnhdr section
;
1413 if (current
->target_index
> 0)
1415 internal_f
.f_nscns
++;
1416 strncpy(&(section
.s_name
[0]), current
->name
, 8);
1418 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1419 Ian Taylor <ian@cygnus.com>. */
1420 if (strcmp (current
->name
, _LIB
) == 0)
1421 section
.s_vaddr
= 0;
1424 section
.s_vaddr
= current
->vma
+ pad
;
1425 section
.s_paddr
= current
->vma
+ pad
;
1426 section
.s_size
= current
->_raw_size
- pad
;
1428 If this section has no size or is unloadable then the scnptr
1431 if (current
->_raw_size
- pad
== 0 ||
1432 (current
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0) {
1433 section
.s_scnptr
= 0;
1436 section
.s_scnptr
= current
->filepos
;
1438 section
.s_relptr
= current
->rel_filepos
;
1439 section
.s_lnnoptr
= current
->line_filepos
;
1440 section
.s_nreloc
= current
->reloc_count
;
1441 section
.s_nlnno
= current
->lineno_count
;
1442 if (current
->reloc_count
!= 0)
1444 if (current
->lineno_count
!= 0)
1447 section
.s_flags
= sec_to_styp_flags(current
->name
,current
->flags
);
1449 if (!strcmp(current
->name
, _TEXT
)) {
1451 } else if (!strcmp(current
->name
, _DATA
)) {
1453 #ifdef TWO_DATA_SECS
1454 } else if (!strcmp(current
->name
, ".data2")) {
1456 #endif /* TWO_DATA_SECS */
1457 } else if (!strcmp(current
->name
, _BSS
)) {
1462 section
.s_align
= (current
->alignment_power
1463 ? 1 << current
->alignment_power
1470 coff_swap_scnhdr_out(abfd
, §ion
, &buff
);
1471 bfd_write((PTR
) (&buff
), 1, SCNHSZ
, abfd
);
1481 /* OK, now set up the filehdr... */
1483 /* Don't include the internal abs section in the section count */
1486 We will NOT put a fucking timestamp in the header here. Every time you
1487 put it back, I will come in and take it out again. I'm sorry. This
1488 field does not belong here. We fill it with a 0 so it compares the
1489 same but is not a reasonable time. -- gnu@cygnus.com
1491 internal_f
.f_timdat
= 0;
1493 if (bfd_get_symcount(abfd
) != 0)
1494 internal_f
.f_symptr
= sym_base
;
1496 internal_f
.f_symptr
= 0;
1498 internal_f
.f_flags
= 0;
1500 if (abfd
->flags
& EXEC_P
)
1501 internal_f
.f_opthdr
= AOUTSZ
;
1503 internal_f
.f_opthdr
= 0;
1506 internal_f
.f_flags
|= F_RELFLG
;
1508 internal_f
.f_flags
|= F_LNNO
;
1509 if (0 == bfd_get_symcount(abfd
))
1510 internal_f
.f_flags
|= F_LSYMS
;
1511 if (abfd
->flags
& EXEC_P
)
1512 internal_f
.f_flags
|= F_EXEC
;
1514 if (!abfd
->xvec
->byteorder_big_p
)
1515 internal_f
.f_flags
|= F_AR32WR
;
1517 internal_f
.f_flags
|= F_AR32W
;
1520 FIXME, should do something about the other byte orders and
1524 /* Set up architecture-dependent stuff */
1526 { unsigned int magic
= 0;
1527 unsigned short flags
= 0;
1528 coff_set_flags(abfd
, &magic
, &flags
);
1529 internal_f
.f_magic
= magic
;
1530 internal_f
.f_flags
|= flags
;
1531 /* ...and the "opt"hdr... */
1534 # ifdef ULTRA3 /* NYU's machine */
1535 /* FIXME: This is a bogus check. I really want to see if there
1536 * is a .shbss or a .shdata section, if so then set the magic
1537 * number to indicate a shared data executable.
1539 if (internal_f
.f_nscns
>= 7)
1540 internal_a
.magic
= SHMAGIC
; /* Shared magic */
1542 # endif /* ULTRA3 */
1543 internal_a
.magic
= NMAGIC
; /* Assume separate i/d */
1544 #define __A_MAGIC_SET__
1547 internal_a
.magic
= (magic
== I960ROMAGIC
? NMAGIC
: OMAGIC
);
1548 #define __A_MAGIC_SET__
1551 #define __A_MAGIC_SET__
1552 internal_a
.magic
= PAGEMAGICBCS
;
1555 #if M68 || MIPS || WE32K
1556 #define __A_MAGIC_SET__
1557 /* Never was anything here for the 68k */
1558 #endif /* M68 || MIPS || WE32K */
1561 # define __A_MAGIC_SET__
1562 internal_a
.magic
= ZMAGIC
;
1566 #define __A_MAGIC_SET__
1567 internal_a
.magic
= (abfd
->flags
& D_PAGED
)? RS6K_AOUTHDR_ZMAGIC
:
1568 (abfd
->flags
& WP_TEXT
)? RS6K_AOUTHDR_NMAGIC
:
1569 RS6K_AOUTHDR_OMAGIC
;
1572 #ifndef __A_MAGIC_SET__
1573 # include "Your aouthdr magic number is not being set!"
1575 # undef __A_MAGIC_SET__
1578 /* Now should write relocs, strings, syms */
1579 obj_sym_filepos(abfd
) = sym_base
;
1581 if (bfd_get_symcount(abfd
) != 0) {
1582 coff_add_missing_symbols (abfd
);
1583 coff_renumber_symbols(abfd
);
1584 coff_mangle_symbols(abfd
);
1585 coff_write_symbols(abfd
);
1586 coff_write_linenumbers(abfd
);
1587 coff_write_relocs(abfd
);
1590 internal_a
.tsize
= bfd_get_section_size_before_reloc(text_sec
);
1591 internal_a
.text_start
= internal_a
.tsize
? text_sec
->vma
: 0;
1594 internal_a
.dsize
= bfd_get_section_size_before_reloc(data_sec
);
1595 internal_a
.data_start
= internal_a
.dsize
? data_sec
->vma
: 0;
1598 internal_a
.bsize
= bfd_get_section_size_before_reloc(bss_sec
);
1601 internal_a
.entry
= bfd_get_start_address(abfd
);
1602 internal_f
.f_nsyms
= bfd_get_symcount(abfd
);
1604 /* now write them */
1605 if (bfd_seek(abfd
, (file_ptr
) 0, SEEK_SET
) != 0)
1609 coff_swap_filehdr_out(abfd
, (PTR
)&internal_f
, (PTR
)&buff
);
1610 bfd_write((PTR
) &buff
, 1, FILHSZ
, abfd
);
1612 if (abfd
->flags
& EXEC_P
) {
1614 coff_swap_aouthdr_out(abfd
, (PTR
)&internal_a
, (PTR
)&buff
);
1615 bfd_write((PTR
) &buff
, 1, AOUTSZ
, abfd
);
1621 DEFUN(coff_set_section_contents
,(abfd
, section
, location
, offset
, count
),
1626 bfd_size_type count
)
1628 if (abfd
->output_has_begun
== false) /* set by bfd.c handler */
1629 coff_compute_section_file_positions(abfd
);
1632 /* If this is a .lib section, bump the vma address so that it
1633 winds up being the number of .lib sections output. This is
1634 right for SVR3.2. Shared libraries should probably get more
1635 generic support. Ian Taylor <ian@cygnus.com>. */
1636 if (strcmp (section
->name
, _LIB
) == 0)
1640 bfd_seek(abfd
, (file_ptr
) (section
->filepos
+ offset
), SEEK_SET
);
1643 return (bfd_write(location
, 1, count
, abfd
) == count
) ? true : false;
1649 coff_close_and_cleanup(abfd
)
1652 if (!bfd_read_p(abfd
))
1653 switch (abfd
->format
) {
1655 if (!_bfd_write_archive_contents(abfd
))
1659 if (!coff_write_object_contents(abfd
))
1663 bfd_error
= invalid_operation
;
1667 /* We depend on bfd_close to free all the memory on the obstack. */
1668 /* FIXME if bfd_release is not using obstacks! */
1675 buy_and_read(abfd
, where
, seek_direction
, size
)
1681 PTR area
= (PTR
) bfd_alloc(abfd
, size
);
1683 bfd_error
= no_memory
;
1686 bfd_seek(abfd
, where
, seek_direction
);
1687 if (bfd_read(area
, 1, size
, abfd
) != size
) {
1688 bfd_error
= system_call_error
;
1692 } /* buy_and_read() */
1698 Creating the linenumber table is done by reading in the entire
1699 coff linenumber table, and creating another table for internal use.
1701 A coff line number table is structured so that each function
1702 is marked as having a line number of 0. Each line within the
1703 function is an offset from the first line in the function. The
1704 base of the line number information for the table is stored in
1705 the symbol associated with the function.
1707 The information is copied from the external to the internal
1708 table, and each symbol which marks a function is marked by
1711 How does this work ?
1716 coff_slurp_line_table(abfd
, asect
)
1720 LINENO
*native_lineno
;
1721 alent
*lineno_cache
;
1723 BFD_ASSERT(asect
->lineno
== (alent
*) NULL
);
1725 native_lineno
= (LINENO
*) buy_and_read(abfd
,
1726 asect
->line_filepos
,
1729 asect
->lineno_count
));
1731 (alent
*) bfd_alloc(abfd
, (size_t) ((asect
->lineno_count
+ 1) * sizeof(alent
)));
1732 if (lineno_cache
== NULL
) {
1733 bfd_error
= no_memory
;
1736 unsigned int counter
= 0;
1737 alent
*cache_ptr
= lineno_cache
;
1738 LINENO
*src
= native_lineno
;
1740 while (counter
< asect
->lineno_count
) {
1741 struct internal_lineno dst
;
1742 coff_swap_lineno_in(abfd
, src
, &dst
);
1743 cache_ptr
->line_number
= dst
.l_lnno
;
1745 if (cache_ptr
->line_number
== 0) {
1746 coff_symbol_type
*sym
=
1747 (coff_symbol_type
*) (dst
.l_addr
.l_symndx
1748 + obj_raw_syments(abfd
))->u
.syment
._n
._n_n
._n_zeroes
;
1749 cache_ptr
->u
.sym
= (asymbol
*) sym
;
1750 sym
->lineno
= cache_ptr
;
1753 cache_ptr
->u
.offset
= dst
.l_addr
.l_paddr
1754 - bfd_section_vma(abfd
, asect
);
1755 } /* If no linenumber expect a symbol index */
1761 cache_ptr
->line_number
= 0;
1764 asect
->lineno
= lineno_cache
;
1765 /* FIXME, free native_lineno here, or use alloca or something. */
1767 } /* coff_slurp_line_table() */
1770 DEFUN(coff_slurp_symbol_table
,(abfd
),
1773 combined_entry_type
*native_symbols
;
1774 coff_symbol_type
*cached_area
;
1775 unsigned int *table_ptr
;
1777 unsigned int number_of_symbols
= 0;
1778 if (obj_symbols(abfd
))
1780 bfd_seek(abfd
, obj_sym_filepos(abfd
), SEEK_SET
);
1782 /* Read in the symbol table */
1783 if ((native_symbols
= coff_get_normalized_symtab(abfd
)) == NULL
) {
1787 /* Allocate enough room for all the symbols in cached form */
1789 (coff_symbol_type
*)
1790 bfd_alloc(abfd
, (size_t) (bfd_get_symcount(abfd
) * sizeof(coff_symbol_type
)));
1792 if (cached_area
== NULL
) {
1793 bfd_error
= no_memory
;
1798 bfd_alloc(abfd
, (size_t) (bfd_get_symcount(abfd
) * sizeof(unsigned int)));
1800 if (table_ptr
== NULL
) {
1801 bfd_error
= no_memory
;
1806 coff_symbol_type
*dst
= cached_area
;
1807 unsigned int last_native_index
= bfd_get_symcount(abfd
);
1808 unsigned int this_index
= 0;
1809 while (this_index
< last_native_index
) {
1810 combined_entry_type
*src
= native_symbols
+ this_index
;
1811 table_ptr
[this_index
] = number_of_symbols
;
1812 dst
->symbol
.the_bfd
= abfd
;
1814 dst
->symbol
.name
= (char *)(src
->u
.syment
._n
._n_n
._n_offset
);
1816 We use the native name field to point to the cached field
1818 src
->u
.syment
._n
._n_n
._n_zeroes
= (int) dst
;
1819 dst
->symbol
.section
= coff_section_from_bfd_index(abfd
,
1820 src
->u
.syment
.n_scnum
);
1821 dst
->symbol
.flags
= 0;
1822 dst
->done_lineno
= false;
1824 switch (src
->u
.syment
.n_sclass
) {
1828 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
1829 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
1830 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
1832 /* Fall through to next case */
1840 if ((src
->u
.syment
.n_scnum
) == 0) {
1841 if ((src
->u
.syment
.n_value
) == 0) {
1842 dst
->symbol
.section
= &bfd_und_section
;
1843 dst
->symbol
.value
= 0;
1846 dst
->symbol
.section
= &bfd_com_section
;
1847 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
1852 Base the value as an index from the base of the
1856 dst
->symbol
.flags
= BSF_EXPORT
| BSF_GLOBAL
;
1857 dst
->symbol
.value
= src
->u
.syment
.n_value
- dst
->symbol
.section
->vma
;
1859 if (ISFCN((src
->u
.syment
.n_type
))) {
1861 A function ext does not go at the end of a file
1863 dst
->symbol
.flags
|= BSF_NOT_AT_END
;
1870 case C_STAT
: /* static */
1872 case C_LEAFSTAT
: /* static leaf procedure */
1874 case C_LABEL
: /* label */
1875 if (src
->u
.syment
.n_scnum
== -2)
1876 dst
->symbol
.flags
= BSF_DEBUGGING
;
1878 dst
->symbol
.flags
= BSF_LOCAL
;
1880 Base the value as an index from the base of the section, if
1883 if (dst
->symbol
.section
)
1884 dst
->symbol
.value
= (src
->u
.syment
.n_value
) -
1885 dst
->symbol
.section
->vma
;
1887 dst
->symbol
.value
= (src
->u
.syment
.n_value
) ;
1890 case C_MOS
: /* member of structure */
1891 case C_EOS
: /* end of structure */
1892 #ifdef NOTDEF /* C_AUTOARG has the same value */
1894 case C_GLBLREG
: /* A29k-specific storage class */
1897 case C_REGPARM
: /* register parameter */
1898 case C_REG
: /* register variable */
1900 case C_AUTOARG
: /* 960-specific storage class */
1902 case C_TPDEF
: /* type definition */
1904 case C_AUTO
: /* automatic variable */
1905 case C_FIELD
: /* bit field */
1906 case C_ENTAG
: /* enumeration tag */
1907 case C_MOE
: /* member of enumeration */
1908 case C_MOU
: /* member of union */
1909 case C_UNTAG
: /* union tag */
1910 dst
->symbol
.flags
= BSF_DEBUGGING
;
1911 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
1914 case C_FILE
: /* file name */
1915 case C_STRTAG
: /* structure tag */
1917 case C_BINCL
: /* beginning of include file */
1918 case C_EINCL
: /* ending of include file */
1931 dst
->symbol
.flags
= BSF_DEBUGGING
;
1932 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
1935 case C_BLOCK
: /* ".bb" or ".eb" */
1936 case C_FCN
: /* ".bf" or ".ef" */
1937 case C_EFCN
: /* physical end of function */
1938 dst
->symbol
.flags
= BSF_LOCAL
;
1940 Base the value as an index from the base of the section
1942 dst
->symbol
.value
= (src
->u
.syment
.n_value
) - dst
->symbol
.section
->vma
;
1946 case C_EXTDEF
: /* external definition */
1947 case C_ULABEL
: /* undefined label */
1948 case C_USTATIC
: /* undefined static */
1949 case C_LINE
: /* line # reformatted as symbol table entry */
1950 case C_ALIAS
: /* duplicate tag */
1951 case C_HIDDEN
: /* ext symbol in dmert public lib */
1954 fprintf(stderr
,"Unrecognized storage class %d\n",
1955 src
->u
.syment
.n_sclass
);
1957 dst
->symbol
.flags
= BSF_DEBUGGING
;
1958 dst
->symbol
.value
= (src
->u
.syment
.n_value
);
1962 /* BFD_ASSERT(dst->symbol.flags != 0);*/
1966 dst
->symbol
.udata
= 0;
1967 dst
->lineno
= (alent
*) NULL
;
1968 this_index
+= (src
->u
.syment
.n_numaux
) + 1;
1970 number_of_symbols
++;
1971 } /* walk the native symtab */
1972 } /* bfdize the native symtab */
1974 obj_symbols(abfd
) = cached_area
;
1975 obj_raw_syments(abfd
) = native_symbols
;
1977 obj_conv_table_size (abfd
) = bfd_get_symcount (abfd
);
1978 bfd_get_symcount(abfd
) = number_of_symbols
;
1979 obj_convert(abfd
) = table_ptr
;
1980 /* Slurp the line tables for each section too */
1985 coff_slurp_line_table(abfd
, p
);
1990 } /* coff_slurp_symbol_table() */
1996 Coff relocations are easily transformed into the internal BFD form
1999 Reading a coff relocation table is done in the following stages:
2001 o The entire coff relocation table is read into memory.
2003 o Each relocation is processed in turn, first it is swapped from the
2004 external to the internal form.
2006 o The symbol referenced in the relocation's symbol index is
2007 turned intoa pointer into the canonical symbol table. Note
2008 that this table is the same as the one returned by a call to
2009 @code{bfd_canonicalize_symtab}. The back end will call the
2010 routine and save the result if a canonicalization hasn't been done.
2012 o The reloc index is turned into a pointer to a howto
2013 structure, in a back end specific way. For instance, the 386
2014 and 960 use the @code{r_type} to directly produce an index
2015 into a howto table vector; the 88k subtracts a number from the
2016 @code{r_type} field and creates an addend field.
2022 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2023 if (ptr && bfd_asymbol_bfd(ptr) == abfd \
2024 && ((ptr->flags & BSF_OLD_COMMON)== 0)) \
2026 cache_ptr->addend = -(ptr->section->vma + ptr->value); \
2029 cache_ptr->addend = 0; \
2034 DEFUN(coff_slurp_reloc_table
,(abfd
, asect
, symbols
),
2039 RELOC
*native_relocs
;
2040 arelent
*reloc_cache
;
2045 if (asect
->relocation
)
2047 if (asect
->reloc_count
== 0)
2049 if (asect
->flags
& SEC_CONSTRUCTOR
)
2051 if (!coff_slurp_symbol_table(abfd
))
2054 (RELOC
*) buy_and_read(abfd
,
2058 asect
->reloc_count
));
2059 reloc_cache
= (arelent
*)
2060 bfd_alloc(abfd
, (size_t) (asect
->reloc_count
* sizeof(arelent
)));
2062 if (reloc_cache
== NULL
) {
2063 bfd_error
= no_memory
;
2068 for (idx
= 0; idx
< asect
->reloc_count
; idx
++)
2070 #ifdef RELOC_PROCESSING
2071 struct internal_reloc dst
;
2072 struct external_reloc
*src
;
2074 cache_ptr
= reloc_cache
+ idx
;
2075 src
= native_relocs
+ idx
;
2076 bfd_swap_reloc_in(abfd
, src
, &dst
);
2078 RELOC_PROCESSING(cache_ptr
, &dst
, symbols
, abfd
, asect
);
2080 struct internal_reloc dst
;
2082 struct external_reloc
*src
;
2084 cache_ptr
= reloc_cache
+ idx
;
2085 src
= native_relocs
+ idx
;
2087 bfd_swap_reloc_in(abfd
, src
, &dst
);
2090 cache_ptr
->address
= dst
.r_vaddr
;
2092 if (dst
.r_symndx
!= -1)
2094 /* @@ Should never be greater than count of symbols! */
2095 if (dst
.r_symndx
>= obj_conv_table_size (abfd
))
2097 cache_ptr
->sym_ptr_ptr
= symbols
+ obj_convert(abfd
)[dst
.r_symndx
];
2098 ptr
= *(cache_ptr
->sym_ptr_ptr
);
2102 cache_ptr
->sym_ptr_ptr
= bfd_abs_section
.symbol_ptr_ptr
;
2107 The symbols definitions that we have read in have been
2108 relocated as if their sections started at 0. But the offsets
2109 refering to the symbols in the raw data have not been
2110 modified, so we have to have a negative addend to compensate.
2112 Note that symbols which used to be common must be left alone */
2114 /* Calculate any reloc addend by looking at the symbol */
2115 CALC_ADDEND(abfd
, ptr
, dst
, cache_ptr
);
2117 cache_ptr
->address
-= asect
->vma
;
2118 /* !! cache_ptr->section = (asection *) NULL;*/
2120 /* Fill in the cache_ptr->howto field from dst.r_type */
2121 RTYPE2HOWTO(cache_ptr
, &dst
);
2126 asect
->relocation
= reloc_cache
;
2131 /* This is stupid. This function should be a boolean predicate */
2133 DEFUN(coff_canonicalize_reloc
, (abfd
, section
, relptr
, symbols
),
2136 arelent
**relptr AND
2139 arelent
*tblptr
= section
->relocation
;
2140 unsigned int count
= 0;
2143 if (section
->flags
& SEC_CONSTRUCTOR
)
2145 /* this section has relocs made up by us, they are not in the
2146 file, so take them out of their chain and place them into
2147 the data area provided */
2148 arelent_chain
*chain
= section
->constructor_chain
;
2149 for (count
= 0; count
< section
->reloc_count
; count
++)
2151 *relptr
++ = &chain
->relent
;
2152 chain
= chain
->next
;
2158 coff_slurp_reloc_table(abfd
, section
, symbols
);
2161 tblptr
= section
->relocation
;
2165 for (; count
++ < section
->reloc_count
;)
2166 *relptr
++ = tblptr
++;
2171 return section
->reloc_count
;
2176 coff_sym_filepos(abfd
)
2179 return obj_sym_filepos(abfd
);
2183 #ifndef coff_reloc16_extra_cases
2184 #define coff_reloc16_extra_cases \
2185 (void (*) PARAMS ((bfd *, bfd_seclet_type *, arelent *, bfd_byte *,\
2186 unsigned int *, unsigned int *))) abort
2189 static CONST bfd_coff_backend_data bfd_coff_std_swap_table
= {
2190 coff_swap_aux_in
, coff_swap_sym_in
, coff_swap_lineno_in
,
2191 coff_swap_aux_out
, coff_swap_sym_out
,
2192 coff_swap_lineno_out
, coff_swap_reloc_out
,
2193 coff_swap_filehdr_out
, coff_swap_aouthdr_out
,
2194 coff_swap_scnhdr_out
,
2195 FILHSZ
, AOUTSZ
, SCNHSZ
, SYMESZ
, AUXESZ
, LINESZ
,
2196 #ifdef COFF_LONG_FILENAMES
2201 coff_swap_filehdr_in
, coff_swap_aouthdr_in
, coff_swap_scnhdr_in
,
2202 coff_bad_format_hook
, coff_set_arch_mach_hook
, coff_mkobject_hook
,
2203 styp_to_sec_flags
, coff_make_section_hook
, coff_set_alignment_hook
,
2204 coff_slurp_symbol_table
, symname_in_debug_hook
, coff_reloc16_extra_cases
2207 #define coff_core_file_failing_command _bfd_dummy_core_file_failing_command
2208 #define coff_core_file_failing_signal _bfd_dummy_core_file_failing_signal
2209 #define coff_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
2210 #define coff_slurp_armap bfd_slurp_coff_armap
2211 #define coff_slurp_extended_name_table _bfd_slurp_extended_name_table
2212 #define coff_truncate_arname bfd_dont_truncate_arname
2213 #define coff_openr_next_archived_file bfd_generic_openr_next_archived_file
2214 #define coff_generic_stat_arch_elt bfd_generic_stat_arch_elt
2215 #define coff_get_section_contents bfd_generic_get_section_contents
2216 #define coff_close_and_cleanup bfd_generic_close_and_cleanup
2218 #define coff_bfd_debug_info_start bfd_void
2219 #define coff_bfd_debug_info_end bfd_void
2220 #define coff_bfd_debug_info_accumulate \
2221 (void (*) PARAMS ((bfd *, struct sec *))) bfd_void
2222 #define coff_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
2223 #define coff_bfd_relax_section bfd_generic_relax_section