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) ((long) (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 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;
841 arch = bfd_arch_m68k;
849 arch = bfd_arch_m88k;
856 switch (internal_f->f_flags & F_MACHMASK)
859 machine = bfd_mach_z8001;
862 machine = bfd_mach_z8002;
873 arch = bfd_arch_i960;
874 switch (F_I960TYPE & internal_f->f_flags)
878 machine = bfd_mach_i960_core;
881 machine = bfd_mach_i960_kb_sb;
884 machine = bfd_mach_i960_mc;
887 machine = bfd_mach_i960_xa;
890 machine = bfd_mach_i960_ca;
893 machine = bfd_mach_i960_ka_sa;
904 arch = bfd_arch_rs6000;
911 arch = bfd_arch_we32k;
918 arch = bfd_arch_h8300;
919 machine = bfd_mach_h8300;
920 /* !! FIXME this probably isn't the right place for this */
921 abfd->flags |= BFD_IS_RELAXABLE;
927 arch = bfd_arch_h8300;
928 machine = bfd_mach_h8300h;
929 /* !! FIXME this probably isn't the right place for this */
930 abfd->flags |= BFD_IS_RELAXABLE;
943 arch = bfd_arch_h8500;
948 default: /* Unreadable input file type */
949 arch = bfd_arch_obscure;
953 bfd_default_set_arch_mach(abfd, arch, machine);
957 #ifdef SYMNAME_IN_DEBUG
960 DEFUN (symname_in_debug_hook, (abfd, sym),
962 struct internal_syment *sym)
964 return SYMNAME_IN_DEBUG (sym) ? true : false;
969 #define symname_in_debug_hook \
970 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
978 To write relocations, all the back end does is step though the
979 canonical relocation table, and create an
980 @code{internal_reloc}. The symbol index to use is removed from
981 the @code{offset} field in the symbol table supplied, the
982 address comes directly from the sum of the section base
983 address and the relocation offset and the type is dug directly
984 from the howto field. Then the @code{internal_reloc} is
985 swapped into the shape of an @code{external_reloc} and written
991 DEFUN(coff_write_relocs,(abfd),
995 for (s = abfd->sections; s != (asection *) NULL; s = s->next) {
997 struct external_reloc dst;
999 arelent **p = s->orelocation;
1000 bfd_seek(abfd, s->rel_filepos, SEEK_SET);
1001 for (i = 0; i < s->reloc_count; i++) {
1002 struct internal_reloc n;
1004 memset((PTR)&n, 0, sizeof(n));
1006 n.r_vaddr = q->address + s->vma;
1007 /* The 29k const/consth reloc pair is a real kludge - the consth
1008 part doesn't have a symbol - it has an offset. So rebuilt
1011 if (q->howto->type == R_IHCONST)
1012 n.r_symndx = q->addend;
1019 if (q->sym_ptr_ptr == bfd_abs_section.symbol_ptr_ptr)
1021 /* This is a relocation relative to the absolute symbol */
1026 n.r_symndx = get_index((*(q->sym_ptr_ptr)));
1027 /* Take notice if the symbol reloc points to a symbol we don't have
1028 in our symbol table. What should we do for this?? */
1029 if (n.r_symndx > obj_conv_table_size (abfd))
1037 /* Work out reloc type from what is required */
1038 SELECT_RELOC(n.r_type, q->howto);
1040 n.r_type = q->howto->type;
1042 coff_swap_reloc_out(abfd, &n, &dst);
1043 bfd_write((PTR) &dst, 1, RELSZ, abfd);
1048 /* Set flags and magic number of a coff file from architecture and machine
1049 type. Result is true if we can represent the arch&type, false if not. */
1052 DEFUN(coff_set_flags,(abfd, magicp, flagsp),
1054 unsigned *magicp AND
1055 unsigned short *flagsp)
1057 switch (bfd_get_arch(abfd)) {
1061 switch (bfd_get_mach(abfd))
1063 case bfd_mach_z8001:
1066 case bfd_mach_z8002:
1080 *magicp = I960ROMAGIC;
1082 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1083 I960RWMAGIC); FIXME???
1085 switch (bfd_get_mach(abfd)) {
1086 case bfd_mach_i960_core:
1089 case bfd_mach_i960_kb_sb:
1092 case bfd_mach_i960_mc:
1095 case bfd_mach_i960_xa:
1098 case bfd_mach_i960_ca:
1101 case bfd_mach_i960_ka_sa:
1114 *magicp = I386MAGIC;
1120 *magicp = MC68MAGIC;
1127 *magicp = MC88OMAGIC;
1132 case bfd_arch_h8300:
1133 switch (bfd_get_mach (abfd))
1135 case bfd_mach_h8300:
1136 *magicp = H8300MAGIC;
1138 case bfd_mach_h8300h:
1139 *magicp = H8300HMAGIC;
1153 case bfd_arch_h8500:
1154 *magicp = H8500MAGIC;
1158 #ifdef A29K_MAGIC_BIG
1160 if (abfd->xvec->byteorder_big_p)
1161 *magicp = A29K_MAGIC_BIG;
1163 *magicp = A29K_MAGIC_LITTLE;
1169 case bfd_arch_we32k:
1170 *magicp = WE32KMAGIC;
1176 case bfd_arch_rs6000:
1177 *magicp = U802TOCMAGIC;
1182 default: /* Unknown architecture */
1183 /* return false; -- fall through to "return false" below, to avoid
1184 "statement never reached" errors on the one below. */
1193 DEFUN(coff_set_arch_mach,(abfd, arch, machine),
1195 enum bfd_architecture arch AND
1196 unsigned long machine)
1199 unsigned short dummy2;
1200 bfd_default_set_arch_mach(abfd, arch, machine);
1202 if (arch != bfd_arch_unknown &&
1203 coff_set_flags(abfd, &dummy1, &dummy2) != true)
1204 return false; /* We can't represent this type */
1205 return true; /* We're easy ... */
1209 /* Calculate the file position for each section. */
1212 DEFUN(coff_compute_section_file_positions,(abfd),
1216 asection *previous = (asection *)NULL;
1217 file_ptr sofar = FILHSZ;
1221 if (bfd_get_start_address(abfd))
1223 /* A start address may have been added to the original file. In this
1224 case it will need an optional header to record it. */
1225 abfd->flags |= EXEC_P;
1228 if (abfd->flags & EXEC_P)
1231 sofar += abfd->section_count * SCNHSZ;
1232 for (current = abfd->sections;
1233 current != (asection *)NULL;
1234 current = current->next) {
1236 /* Only deal with sections which have contents */
1237 if (!(current->flags & SEC_HAS_CONTENTS))
1240 /* Align the sections in the file to the same boundary on
1241 which they are aligned in virtual memory. I960 doesn't
1242 do this (FIXME) so we can stay in sync with Intel. 960
1243 doesn't yet page from files... */
1246 /* make sure this section is aligned on the right boundary - by
1247 padding the previous section up if necessary */
1250 sofar = BFD_ALIGN(sofar, 1 << current->alignment_power);
1251 if (previous != (asection *)NULL) {
1252 previous->_raw_size += sofar - old_sofar;
1257 /* FIXME, in demand paged files, the low order bits of the file
1258 offset must match the low order bits of the virtual address.
1259 "Low order" is apparently implementation defined. Add code
1260 here to round sofar up to match the virtual address. */
1262 current->filepos = sofar;
1264 sofar += current->_raw_size;
1266 /* make sure that this section is of the right size too */
1268 sofar = BFD_ALIGN(sofar, 1 << current->alignment_power);
1269 current->_raw_size += sofar - old_sofar ;
1273 /* Force .lib sections to start at zero. The vma is then
1274 incremented in coff_set_section_contents. This is right for
1276 if (strcmp (current->name, _LIB) == 0)
1277 bfd_set_section_vma (abfd, current, 0);
1282 obj_relocbase(abfd) = sofar;
1285 /* If .file, .text, .data, .bss symbols are missing, add them. */
1286 /* @@ Should we only be adding missing symbols, or overriding the aux
1287 values for existing section symbols? */
1289 coff_add_missing_symbols (abfd)
1292 unsigned int nsyms = bfd_get_symcount (abfd);
1293 asymbol **sympp = abfd->outsymbols;
1296 int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
1298 for (i = 0; i < nsyms; i++)
1300 coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
1304 /* only do this if there is a coff representation of the input
1306 if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
1311 name = csym->symbol.name;
1314 if (!strcmp (name, _TEXT))
1316 else if (!strcmp (name, _DATA))
1318 else if (!strcmp (name, _BSS))
1322 /* Now i == bfd_get_symcount (abfd). */
1323 /* @@ For now, don't deal with .file symbol. */
1326 if (!need_text && !need_data && !need_bss && !need_file)
1328 nsyms += need_text + need_data + need_bss + need_file;
1329 sympp2 = (asymbol**) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
1330 memcpy (sympp2, sympp, i * sizeof (asymbol *));
1333 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1337 sympp2[i++] = coff_section_symbol (abfd, _TEXT);
1339 sympp2[i++] = coff_section_symbol (abfd, _DATA);
1341 sympp2[i++] = coff_section_symbol (abfd, _BSS);
1342 BFD_ASSERT (i == nsyms);
1343 bfd_set_symtab (abfd, sympp2, nsyms);
1349 DEFUN(coff_write_object_contents,(abfd),
1355 boolean hasrelocs = false;
1356 boolean haslinno = false;
1357 file_ptr reloc_base;
1358 file_ptr lineno_base;
1362 unsigned long reloc_size = 0;
1363 unsigned long lnno_size = 0;
1364 asection *text_sec = NULL;
1365 asection *data_sec = NULL;
1366 asection *bss_sec = NULL;
1368 struct internal_filehdr internal_f;
1369 struct internal_aouthdr internal_a;
1372 bfd_error = system_call_error;
1373 /* Number the output sections, starting from one on the first section
1374 with a name which doesn't start with a *.
1375 @@ The code doesn't make this check. Is it supposed to be done,
1378 for (current = abfd->sections; current != (asection *)NULL;
1379 current = current->next)
1381 current->target_index = count;
1385 if(abfd->output_has_begun == false) {
1386 coff_compute_section_file_positions(abfd);
1389 if (abfd->sections != (asection *)NULL) {
1390 scn_base = abfd->sections->filepos;
1395 if (bfd_seek(abfd, scn_base, SEEK_SET) != 0)
1397 reloc_base = obj_relocbase(abfd);
1399 /* Make a pass through the symbol table to count line number entries and
1400 put them into the correct asections */
1402 lnno_size = coff_count_linenumbers(abfd) * LINESZ;
1403 data_base = scn_base;
1405 /* Work out the size of the reloc and linno areas */
1407 for (current = abfd->sections; current != NULL; current =
1410 /* We give section headers to +ve indexes */
1411 if (current->target_index > 0)
1414 reloc_size += current->reloc_count * RELSZ;
1415 data_base += SCNHSZ;
1420 lineno_base = reloc_base + reloc_size;
1421 sym_base = lineno_base + lnno_size;
1423 /* Indicate in each section->line_filepos its actual file address */
1424 for (current = abfd->sections; current != NULL; current =
1427 if (current->target_index > 0)
1430 if (current->lineno_count) {
1431 current->line_filepos = lineno_base;
1432 current->moving_line_filepos = lineno_base;
1433 lineno_base += current->lineno_count * LINESZ;
1436 current->line_filepos = 0;
1438 if (current->reloc_count) {
1439 current->rel_filepos = reloc_base;
1440 reloc_base += current->reloc_count * RELSZ;
1443 current->rel_filepos = 0;
1450 /* Write section headers to the file. */
1451 internal_f.f_nscns = 0;
1453 (file_ptr) ((abfd->flags & EXEC_P) ?
1454 (FILHSZ + AOUTSZ) : FILHSZ),
1459 unsigned int pad = abfd->flags & D_PAGED ? data_base : 0;
1461 unsigned int pad = 0;
1463 for (current = abfd->sections;
1465 current = current->next) {
1466 struct internal_scnhdr section;
1467 if (current->target_index > 0)
1469 internal_f.f_nscns ++;
1470 strncpy(&(section.s_name[0]), current->name, 8);
1472 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1474 if (strcmp (current->name, _LIB) == 0)
1475 section.s_vaddr = 0;
1478 section.s_vaddr = current->lma + pad;
1479 section.s_paddr = current->lma + pad;
1480 section.s_size = current->_raw_size - pad;
1482 If this section has no size or is unloadable then the scnptr
1485 if (current->_raw_size - pad == 0 ||
1486 (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0) {
1487 section.s_scnptr = 0;
1490 section.s_scnptr = current->filepos;
1492 section.s_relptr = current->rel_filepos;
1493 section.s_lnnoptr = current->line_filepos;
1494 section.s_nreloc = current->reloc_count;
1495 section.s_nlnno = current->lineno_count;
1496 if (current->reloc_count != 0)
1498 if (current->lineno_count != 0)
1501 section.s_flags = sec_to_styp_flags(current->name,current->flags);
1503 if (!strcmp(current->name, _TEXT)) {
1505 } else if (!strcmp(current->name, _DATA)) {
1507 #ifdef TWO_DATA_SECS
1508 } else if (!strcmp(current->name, ".data2")) {
1510 #endif /* TWO_DATA_SECS */
1511 } else if (!strcmp(current->name, _BSS)) {
1516 section.s_align = (current->alignment_power
1517 ? 1 << current->alignment_power
1524 coff_swap_scnhdr_out(abfd, §ion, &buff);
1525 bfd_write((PTR) (&buff), 1, SCNHSZ, abfd);
1535 /* OK, now set up the filehdr... */
1537 /* Don't include the internal abs section in the section count */
1540 We will NOT put a fucking timestamp in the header here. Every time you
1541 put it back, I will come in and take it out again. I'm sorry. This
1542 field does not belong here. We fill it with a 0 so it compares the
1545 internal_f.f_timdat = 0;
1547 if (bfd_get_symcount(abfd) != 0)
1548 internal_f.f_symptr = sym_base;
1550 internal_f.f_symptr = 0;
1552 internal_f.f_flags = 0;
1554 if (abfd->flags & EXEC_P)
1555 internal_f.f_opthdr = AOUTSZ;
1557 internal_f.f_opthdr = 0;
1560 internal_f.f_flags |= F_RELFLG;
1562 internal_f.f_flags |= F_LNNO;
1563 if (0 == bfd_get_symcount(abfd))
1564 internal_f.f_flags |= F_LSYMS;
1565 if (abfd->flags & EXEC_P)
1566 internal_f.f_flags |= F_EXEC;
1568 if (!abfd->xvec->byteorder_big_p)
1569 internal_f.f_flags |= F_AR32WR;
1571 internal_f.f_flags |= F_AR32W;
1574 FIXME, should do something about the other byte orders and
1578 /* Set up architecture-dependent stuff */
1580 { unsigned int magic = 0;
1581 unsigned short flags = 0;
1582 coff_set_flags(abfd, &magic, &flags);
1583 internal_f.f_magic = magic;
1584 internal_f.f_flags |= flags;
1585 /* ...and the "opt"hdr... */
1588 # ifdef ULTRA3 /* NYU's machine */
1589 /* FIXME: This is a bogus check. I really want to see if there
1590 * is a .shbss or a .shdata section, if so then set the magic
1591 * number to indicate a shared data executable.
1593 if (internal_f.f_nscns >= 7)
1594 internal_a.magic = SHMAGIC; /* Shared magic */
1596 # endif /* ULTRA3 */
1597 internal_a.magic = NMAGIC; /* Assume separate i/d */
1598 #define __A_MAGIC_SET__
1601 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
1602 #define __A_MAGIC_SET__
1605 #define __A_MAGIC_SET__
1606 internal_a.magic = PAGEMAGICBCS;
1610 #define __A_MAGIC_SET__
1611 /* Never was anything here for the 68k */
1612 #endif /* M68 || WE32K */
1615 # define __A_MAGIC_SET__
1616 internal_a.magic = ZMAGIC;
1620 #define __A_MAGIC_SET__
1621 internal_a.magic = (abfd->flags & D_PAGED)? RS6K_AOUTHDR_ZMAGIC:
1622 (abfd->flags & WP_TEXT)? RS6K_AOUTHDR_NMAGIC:
1623 RS6K_AOUTHDR_OMAGIC;
1626 #ifndef __A_MAGIC_SET__
1627 # include "Your aouthdr magic number is not being set!"
1629 # undef __A_MAGIC_SET__
1632 /* Now should write relocs, strings, syms */
1633 obj_sym_filepos(abfd) = sym_base;
1635 if (bfd_get_symcount(abfd) != 0) {
1636 coff_add_missing_symbols (abfd);
1637 coff_renumber_symbols(abfd);
1638 coff_mangle_symbols(abfd);
1639 coff_write_symbols(abfd);
1640 coff_write_linenumbers(abfd);
1641 coff_write_relocs(abfd);
1644 internal_a.tsize = bfd_get_section_size_before_reloc(text_sec);
1645 internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
1648 internal_a.dsize = bfd_get_section_size_before_reloc(data_sec);
1649 internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
1652 internal_a.bsize = bfd_get_section_size_before_reloc(bss_sec);
1655 internal_a.entry = bfd_get_start_address(abfd);
1656 internal_f.f_nsyms = bfd_get_symcount(abfd);
1658 /* now write them */
1659 if (bfd_seek(abfd, (file_ptr) 0, SEEK_SET) != 0)
1663 coff_swap_filehdr_out(abfd, (PTR)&internal_f, (PTR)&buff);
1664 bfd_write((PTR) &buff, 1, FILHSZ, abfd);
1666 if (abfd->flags & EXEC_P) {
1668 coff_swap_aouthdr_out(abfd, (PTR)&internal_a, (PTR)&buff);
1669 bfd_write((PTR) &buff, 1, AOUTSZ, abfd);
1675 DEFUN(coff_set_section_contents,(abfd, section, location, offset, count),
1680 bfd_size_type count)
1682 if (abfd->output_has_begun == false) /* set by bfd.c handler */
1683 coff_compute_section_file_positions(abfd);
1686 /* If this is a .lib section, bump the vma address so that it
1687 winds up being the number of .lib sections output. This is
1688 right for SVR3.2. Shared libraries should probably get more
1690 if (strcmp (section->name, _LIB) == 0)
1694 /* Don't write out bss sections - one way to do this is to
1695 see if the filepos has not been set. */
1696 if (section->filepos == 0)
1699 bfd_seek(abfd, (file_ptr) (section->filepos + offset), SEEK_SET);
1702 return (bfd_write(location, 1, count, abfd) == count) ? true : false;
1708 coff_close_and_cleanup(abfd)
1711 if (!bfd_read_p(abfd))
1712 switch (abfd->format) {
1714 if (!_bfd_write_archive_contents(abfd))
1718 if (!coff_write_object_contents(abfd))
1722 bfd_error = invalid_operation;
1726 /* We depend on bfd_close to free all the memory on the obstack. */
1727 /* FIXME if bfd_release is not using obstacks! */
1734 buy_and_read(abfd, where, seek_direction, size)
1740 PTR area = (PTR) bfd_alloc(abfd, size);
1742 bfd_error = no_memory;
1745 bfd_seek(abfd, where, seek_direction);
1746 if (bfd_read(area, 1, size, abfd) != size) {
1747 bfd_error = system_call_error;
1751 } /* buy_and_read() */
1757 Creating the linenumber table is done by reading in the entire
1758 coff linenumber table, and creating another table for internal use.
1760 A coff line number table is structured so that each function
1761 is marked as having a line number of 0. Each line within the
1762 function is an offset from the first line in the function. The
1763 base of the line number information for the table is stored in
1764 the symbol associated with the function.
1766 The information is copied from the external to the internal
1767 table, and each symbol which marks a function is marked by
1770 How does this work ?
1775 coff_slurp_line_table(abfd, asect)
1779 LINENO *native_lineno;
1780 alent *lineno_cache;
1782 BFD_ASSERT(asect->lineno == (alent *) NULL);
1784 native_lineno = (LINENO *) buy_and_read(abfd,
1785 asect->line_filepos,
1788 asect->lineno_count));
1790 (alent *) bfd_alloc(abfd, (size_t) ((asect->lineno_count + 1) * sizeof(alent)));
1791 if (lineno_cache == NULL) {
1792 bfd_error = no_memory;
1795 unsigned int counter = 0;
1796 alent *cache_ptr = lineno_cache;
1797 LINENO *src = native_lineno;
1799 while (counter < asect->lineno_count) {
1800 struct internal_lineno dst;
1801 coff_swap_lineno_in(abfd, src, &dst);
1802 cache_ptr->line_number = dst.l_lnno;
1804 if (cache_ptr->line_number == 0) {
1805 coff_symbol_type *sym =
1806 (coff_symbol_type *) (dst.l_addr.l_symndx
1807 + obj_raw_syments(abfd))->u.syment._n._n_n._n_zeroes;
1808 cache_ptr->u.sym = (asymbol *) sym;
1809 sym->lineno = cache_ptr;
1812 cache_ptr->u.offset = dst.l_addr.l_paddr
1813 - bfd_section_vma(abfd, asect);
1814 } /* If no linenumber expect a symbol index */
1820 cache_ptr->line_number = 0;
1823 asect->lineno = lineno_cache;
1824 /* FIXME, free native_lineno here, or use alloca or something. */
1826 } /* coff_slurp_line_table() */
1829 DEFUN(coff_slurp_symbol_table,(abfd),
1832 combined_entry_type *native_symbols;
1833 coff_symbol_type *cached_area;
1834 unsigned int *table_ptr;
1836 unsigned int number_of_symbols = 0;
1837 if (obj_symbols(abfd))
1839 bfd_seek(abfd, obj_sym_filepos(abfd), SEEK_SET);
1841 /* Read in the symbol table */
1842 if ((native_symbols = coff_get_normalized_symtab(abfd)) == NULL) {
1846 /* Allocate enough room for all the symbols in cached form */
1848 (coff_symbol_type *)
1849 bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(coff_symbol_type)));
1851 if (cached_area == NULL) {
1852 bfd_error = no_memory;
1857 bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(unsigned int)));
1859 if (table_ptr == NULL) {
1860 bfd_error = no_memory;
1865 coff_symbol_type *dst = cached_area;
1866 unsigned int last_native_index = bfd_get_symcount(abfd);
1867 unsigned int this_index = 0;
1868 while (this_index < last_native_index) {
1869 combined_entry_type *src = native_symbols + this_index;
1870 table_ptr[this_index] = number_of_symbols;
1871 dst->symbol.the_bfd = abfd;
1873 dst->symbol.name = (char *)(src->u.syment._n._n_n._n_offset);
1875 We use the native name field to point to the cached field
1877 src->u.syment._n._n_n._n_zeroes = (long) dst;
1878 dst->symbol.section = coff_section_from_bfd_index(abfd,
1879 src->u.syment.n_scnum);
1880 dst->symbol.flags = 0;
1881 dst->done_lineno = false;
1883 switch (src->u.syment.n_sclass) {
1887 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
1888 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
1889 dst->symbol.flags |= BSF_NOT_AT_END;
1891 /* Fall through to next case */
1899 if ((src->u.syment.n_scnum) == 0) {
1900 if ((src->u.syment.n_value) == 0) {
1901 dst->symbol.section = &bfd_und_section;
1902 dst->symbol.value= 0;
1905 dst->symbol.section = &bfd_com_section;
1906 dst->symbol.value = (src->u.syment.n_value);
1911 Base the value as an index from the base of the
1915 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
1916 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
1918 if (ISFCN((src->u.syment.n_type))) {
1920 A function ext does not go at the end of a file
1922 dst->symbol.flags |= BSF_NOT_AT_END;
1929 case C_STAT: /* static */
1931 case C_LEAFSTAT: /* static leaf procedure */
1933 case C_LABEL: /* label */
1934 if (src->u.syment.n_scnum == -2)
1935 dst->symbol.flags = BSF_DEBUGGING;
1937 dst->symbol.flags = BSF_LOCAL;
1939 Base the value as an index from the base of the section, if
1942 if (dst->symbol.section)
1943 dst->symbol.value = (src->u.syment.n_value) -
1944 dst->symbol.section->vma;
1946 dst->symbol.value = (src->u.syment.n_value) ;
1949 case C_MOS: /* member of structure */
1950 case C_EOS: /* end of structure */
1951 #ifdef NOTDEF /* C_AUTOARG has the same value */
1953 case C_GLBLREG: /* A29k-specific storage class */
1956 case C_REGPARM: /* register parameter */
1957 case C_REG: /* register variable */
1959 case C_AUTOARG: /* 960-specific storage class */
1961 case C_TPDEF: /* type definition */
1963 case C_AUTO: /* automatic variable */
1964 case C_FIELD: /* bit field */
1965 case C_ENTAG: /* enumeration tag */
1966 case C_MOE: /* member of enumeration */
1967 case C_MOU: /* member of union */
1968 case C_UNTAG: /* union tag */
1969 dst->symbol.flags = BSF_DEBUGGING;
1970 dst->symbol.value = (src->u.syment.n_value);
1973 case C_FILE: /* file name */
1974 case C_STRTAG: /* structure tag */
1976 case C_BINCL: /* beginning of include file */
1977 case C_EINCL: /* ending of include file */
1990 dst->symbol.flags = BSF_DEBUGGING;
1991 dst->symbol.value = (src->u.syment.n_value);
1994 case C_BLOCK: /* ".bb" or ".eb" */
1995 case C_FCN: /* ".bf" or ".ef" */
1996 case C_EFCN: /* physical end of function */
1997 dst->symbol.flags = BSF_LOCAL;
1999 Base the value as an index from the base of the section
2001 dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma;
2005 case C_EXTDEF: /* external definition */
2006 case C_ULABEL: /* undefined label */
2007 case C_USTATIC: /* undefined static */
2008 case C_LINE: /* line # reformatted as symbol table entry */
2009 case C_ALIAS: /* duplicate tag */
2010 case C_HIDDEN: /* ext symbol in dmert public lib */
2013 fprintf(stderr,"Unrecognized storage class %d\n",
2014 src->u.syment.n_sclass);
2016 dst->symbol.flags = BSF_DEBUGGING;
2017 dst->symbol.value = (src->u.syment.n_value);
2021 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2025 dst->symbol.udata = 0;
2026 dst->lineno = (alent *) NULL;
2027 this_index += (src->u.syment.n_numaux) + 1;
2029 number_of_symbols++;
2030 } /* walk the native symtab */
2031 } /* bfdize the native symtab */
2033 obj_symbols(abfd) = cached_area;
2034 obj_raw_syments(abfd) = native_symbols;
2036 obj_conv_table_size (abfd) = bfd_get_symcount (abfd);
2037 bfd_get_symcount(abfd) = number_of_symbols;
2038 obj_convert(abfd) = table_ptr;
2039 /* Slurp the line tables for each section too */
2044 coff_slurp_line_table(abfd, p);
2049 } /* coff_slurp_symbol_table() */
2055 Coff relocations are easily transformed into the internal BFD form
2058 Reading a coff relocation table is done in the following stages:
2060 o The entire coff relocation table is read into memory.
2062 o Each relocation is processed in turn, first it is swapped from the
2063 external to the internal form.
2065 o The symbol referenced in the relocation's symbol index is
2066 turned intoa pointer into the canonical symbol table. Note
2067 that this table is the same as the one returned by a call to
2068 @code{bfd_canonicalize_symtab}. The back end will call the
2069 routine and save the result if a canonicalization hasn't been done.
2071 o The reloc index is turned into a pointer to a howto
2072 structure, in a back end specific way. For instance, the 386
2073 and 960 use the @code{r_type} to directly produce an index
2074 into a howto table vector; the 88k subtracts a number from the
2075 @code{r_type} field and creates an addend field.
2081 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2082 if (ptr && bfd_asymbol_bfd(ptr) == abfd \
2083 && ((ptr->flags & BSF_OLD_COMMON)== 0)) \
2085 cache_ptr->addend = -(ptr->section->vma + ptr->value); \
2088 cache_ptr->addend = 0; \
2093 DEFUN(coff_slurp_reloc_table,(abfd, asect, symbols),
2098 RELOC *native_relocs;
2099 arelent *reloc_cache;
2104 if (asect->relocation)
2106 if (asect->reloc_count == 0)
2108 if (asect->flags & SEC_CONSTRUCTOR)
2110 if (!coff_slurp_symbol_table(abfd))
2113 (RELOC *) buy_and_read(abfd,
2117 asect->reloc_count));
2118 reloc_cache = (arelent *)
2119 bfd_alloc(abfd, (size_t) (asect->reloc_count * sizeof(arelent)));
2121 if (reloc_cache == NULL) {
2122 bfd_error = no_memory;
2127 for (idx = 0; idx < asect->reloc_count; idx ++)
2129 #ifdef RELOC_PROCESSING
2130 struct internal_reloc dst;
2131 struct external_reloc *src;
2133 cache_ptr = reloc_cache + idx;
2134 src = native_relocs + idx;
2135 bfd_swap_reloc_in(abfd, src, &dst);
2137 RELOC_PROCESSING(cache_ptr, &dst, symbols, abfd, asect);
2139 struct internal_reloc dst;
2141 struct external_reloc *src;
2143 cache_ptr = reloc_cache + idx;
2144 src = native_relocs + idx;
2146 bfd_swap_reloc_in(abfd, src, &dst);
2149 cache_ptr->address = dst.r_vaddr;
2151 if (dst.r_symndx != -1)
2153 /* @@ Should never be greater than count of symbols! */
2154 if (dst.r_symndx >= obj_conv_table_size (abfd))
2156 cache_ptr->sym_ptr_ptr = symbols + obj_convert(abfd)[dst.r_symndx];
2157 ptr = *(cache_ptr->sym_ptr_ptr);
2161 cache_ptr->sym_ptr_ptr= bfd_abs_section.symbol_ptr_ptr;
2166 The symbols definitions that we have read in have been
2167 relocated as if their sections started at 0. But the offsets
2168 refering to the symbols in the raw data have not been
2169 modified, so we have to have a negative addend to compensate.
2171 Note that symbols which used to be common must be left alone */
2173 /* Calculate any reloc addend by looking at the symbol */
2174 CALC_ADDEND(abfd, ptr, dst, cache_ptr);
2176 cache_ptr->address -= asect->vma;
2177 /* !! cache_ptr->section = (asection *) NULL;*/
2179 /* Fill in the cache_ptr->howto field from dst.r_type */
2180 RTYPE2HOWTO(cache_ptr, &dst);
2185 asect->relocation = reloc_cache;
2190 /* This is stupid. This function should be a boolean predicate */
2192 DEFUN(coff_canonicalize_reloc, (abfd, section, relptr, symbols),
2195 arelent **relptr AND
2198 arelent *tblptr = section->relocation;
2199 unsigned int count = 0;
2202 if (section->flags & SEC_CONSTRUCTOR)
2204 /* this section has relocs made up by us, they are not in the
2205 file, so take them out of their chain and place them into
2206 the data area provided */
2207 arelent_chain *chain = section->constructor_chain;
2208 for (count = 0; count < section->reloc_count; count ++)
2210 *relptr ++ = &chain->relent;
2211 chain = chain->next;
2217 coff_slurp_reloc_table(abfd, section, symbols);
2220 tblptr = section->relocation;
2224 for (; count++ < section->reloc_count;)
2225 *relptr++ = tblptr++;
2230 return section->reloc_count;
2235 coff_sym_filepos(abfd)
2238 return obj_sym_filepos(abfd);
2242 #ifndef coff_reloc16_extra_cases
2243 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
2244 /* This works even if abort is not declared in any header file. */
2246 dummy_reloc16_extra_cases (abfd, seclet, reloc, data, src_ptr, dst_ptr)
2248 struct bfd_seclet *seclet;
2251 unsigned int *src_ptr;
2252 unsigned int *dst_ptr;
2254 printf("%s\n", reloc->howto->name);
2259 static CONST bfd_coff_backend_data bfd_coff_std_swap_table = {
2260 coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
2261 coff_swap_aux_out, coff_swap_sym_out,
2262 coff_swap_lineno_out, coff_swap_reloc_out,
2263 coff_swap_filehdr_out, coff_swap_aouthdr_out,
2264 coff_swap_scnhdr_out,
2265 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, LINESZ,
2266 #ifdef COFF_LONG_FILENAMES
2271 coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
2272 coff_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook,
2273 styp_to_sec_flags, coff_make_section_hook, coff_set_alignment_hook,
2274 coff_slurp_symbol_table, symname_in_debug_hook, coff_reloc16_extra_cases
2277 #define coff_core_file_failing_command _bfd_dummy_core_file_failing_command
2278 #define coff_core_file_failing_signal _bfd_dummy_core_file_failing_signal
2279 #define coff_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
2280 #define coff_slurp_armap bfd_slurp_coff_armap
2281 #define coff_slurp_extended_name_table _bfd_slurp_extended_name_table
2282 #define coff_truncate_arname bfd_dont_truncate_arname
2283 #define coff_openr_next_archived_file bfd_generic_openr_next_archived_file
2284 #define coff_generic_stat_arch_elt bfd_generic_stat_arch_elt
2285 #define coff_get_section_contents bfd_generic_get_section_contents
2286 #define coff_close_and_cleanup bfd_generic_close_and_cleanup
2288 #define coff_bfd_debug_info_start bfd_void
2289 #define coff_bfd_debug_info_end bfd_void
2290 #define coff_bfd_debug_info_accumulate \
2291 (void (*) PARAMS ((bfd *, struct sec *))) bfd_void
2292 #define coff_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
2293 #define coff_bfd_relax_section bfd_generic_relax_section
2294 #define coff_bfd_seclet_link bfd_generic_seclet_link
2295 #define coff_bfd_reloc_type_lookup \
2296 ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)