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 . PTR internal_aouthdr));
544 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
546 . PTR internal_scnhdr));
547 . asection *(*_bfd_make_section_hook) PARAMS ((
550 . void (*_bfd_set_alignment_hook) PARAMS ((
553 . PTR internal_scnhdr));
554 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
556 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
558 . struct internal_syment *sym));
559 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
561 . struct bfd_seclet *seclet,
564 . unsigned int *src_ptr,
565 . unsigned int *dst_ptr));
566 .} bfd_coff_backend_data;
568 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
570 .#define bfd_coff_swap_aux_in(a,e,t,c,i) \
571 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,i))
573 .#define bfd_coff_swap_sym_in(a,e,i) \
574 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
576 .#define bfd_coff_swap_lineno_in(a,e,i) \
577 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
579 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
580 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
582 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
583 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
585 .#define bfd_coff_swap_aux_out(abfd, i, t,c,o) \
586 . ((coff_backend_info (abfd)->_bfd_coff_swap_aux_out) (abfd, i,t,c, o))
588 .#define bfd_coff_swap_sym_out(abfd, i,o) \
589 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
591 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
592 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
594 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
595 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
597 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
598 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
600 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
601 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
602 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
603 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
604 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
605 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
606 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
607 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
608 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
610 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
611 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
613 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
614 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
616 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
617 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
619 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
620 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
621 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
622 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
624 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr)\
625 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr))
627 .#define bfd_coff_make_section_hook(abfd, name)\
628 . ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
630 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
631 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
633 .#define bfd_coff_slurp_symbol_table(abfd)\
634 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
636 .#define bfd_coff_symname_in_debug(abfd, sym)\
637 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
639 .#define bfd_coff_reloc16_extra_cases(abfd, seclet, reloc, data, src_ptr, dst_ptr)\
640 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
641 . (abfd, seclet, reloc, data, src_ptr, dst_ptr))
645 /* See whether the magic number matches. */
648 DEFUN(coff_bad_format_hook, (abfd, filehdr),
652 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
654 if (BADMAG (*internal_f))
657 /* if the optional header is NULL or not the correct size then
658 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
659 and Intel 960 readwrite headers (I960WRMAGIC) is that the
660 optional header is of a different size.
662 But the mips keeps extra stuff in it's opthdr, so dont check
666 #if defined(M88) || defined(I960)
667 if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr)
675 DEFUN (coff_make_section_hook, (abfd, name),
680 /* On SCO a file created by the Microsoft assembler can have two
681 .data sections. We use .data2 for the second one. */
682 if (strcmp (name, _DATA) == 0)
683 return bfd_make_section (abfd, ".data2");
685 return (asection *) NULL;
689 initialize a section structure with information peculiar to this
690 particular implementation of coff
694 DEFUN(coff_new_section_hook,(abfd, section),
698 section->alignment_power = abfd->xvec->align_power_min;
699 /* Allocate aux records for section symbols, to store size and
702 @@ Shouldn't use constant multiplier here! */
703 coffsymbol (section->symbol)->native =
704 (combined_entry_type *) bfd_zalloc (abfd,
705 sizeof (combined_entry_type) * 10);
712 /* Set the alignment of a BFD section. */
715 DEFUN (coff_set_alignment_hook, (abfd, section, scnhdr),
717 asection *section AND
720 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
723 for (i = 0; i < 32; i++)
724 if ((1 << i) >= hdr->s_align)
726 section->alignment_power = i;
731 #define coff_set_alignment_hook \
732 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
737 DEFUN(coff_mkobject,(abfd),
740 coff_data_type *coff;
742 abfd->tdata.coff_obj_data = (struct coff_tdata *)bfd_zalloc (abfd,sizeof(coff_data_type));
743 if (abfd->tdata.coff_obj_data == 0){
744 bfd_error = no_memory;
747 coff = coff_data (abfd);
748 coff->symbols = (coff_symbol_type *) NULL;
749 coff->conversion_table = (unsigned int *) NULL;
750 coff->raw_syments = (struct coff_ptr_struct *) NULL;
751 coff->raw_linenos = (struct lineno *) NULL;
753 /* make_abs_section(abfd);*/
757 /* Create the COFF backend specific information. */
760 DEFUN(coff_mkobject_hook,(abfd, filehdr, aouthdr),
765 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
766 coff_data_type *coff;
768 if (coff_mkobject (abfd) == false)
771 coff = coff_data (abfd);
773 coff->sym_filepos = internal_f->f_symptr;
774 coff->flags = internal_f->f_flags;
776 /* These members communicate important constants about the symbol
777 table to GDB's symbol-reading code. These `constants'
778 unfortunately vary among coff implementations... */
779 coff->local_n_btmask = N_BTMASK;
780 coff->local_n_btshft = N_BTSHFT;
781 coff->local_n_tmask = N_TMASK;
782 coff->local_n_tshift = N_TSHIFT;
783 coff->local_symesz = SYMESZ;
784 coff->local_auxesz = AUXESZ;
785 coff->local_linesz = LINESZ;
790 /* Determine the machine architecture and type. FIXME: This is target
791 dependent because the magic numbers are defined in the target
792 dependent header files. But there is no particular need for this.
793 If the magic numbers were moved to a separate file, this function
794 would be target independent and would also be much more successful
795 at linking together COFF files for different architectures. */
798 DEFUN (coff_set_arch_mach_hook, (abfd, filehdr),
803 enum bfd_architecture arch;
804 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
807 switch (internal_f->f_magic) {
811 case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
813 arch = bfd_arch_i386;
818 #ifdef A29K_MAGIC_BIG
820 case A29K_MAGIC_LITTLE:
821 arch = bfd_arch_a29k;
829 arch = bfd_arch_m68k;
837 arch = bfd_arch_m88k;
844 switch (internal_f->f_flags & F_MACHMASK)
847 machine = bfd_mach_z8001;
850 machine = bfd_mach_z8002;
861 arch = bfd_arch_i960;
862 switch (F_I960TYPE & internal_f->f_flags)
866 machine = bfd_mach_i960_core;
869 machine = bfd_mach_i960_kb_sb;
872 machine = bfd_mach_i960_mc;
875 machine = bfd_mach_i960_xa;
878 machine = bfd_mach_i960_ca;
881 machine = bfd_mach_i960_ka_sa;
892 arch = bfd_arch_rs6000;
899 arch = bfd_arch_we32k;
906 arch = bfd_arch_h8300;
911 default: /* Unreadable input file type */
912 arch = bfd_arch_obscure;
916 bfd_default_set_arch_mach(abfd, arch, machine);
920 #ifdef SYMNAME_IN_DEBUG
923 DEFUN (symname_in_debug_hook, (abfd, sym),
925 struct internal_syment *sym)
927 return SYMNAME_IN_DEBUG (sym) ? true : false;
932 #define symname_in_debug_hook \
933 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
941 To write relocations, all the back end does is step though the
942 canonical relocation table, and create an
943 @code{internal_reloc}. The symbol index to use is removed from
944 the @code{offset} field in the symbol table supplied, the
945 address comes directly from the sum of the section base
946 address and the relocation offset and the type is dug directly
947 from the howto field. Then the @code{internal_reloc} is
948 swapped into the shape of an @code{external_reloc} and written
954 DEFUN(coff_write_relocs,(abfd),
958 for (s = abfd->sections; s != (asection *) NULL; s = s->next) {
960 struct external_reloc dst;
962 arelent **p = s->orelocation;
963 bfd_seek(abfd, s->rel_filepos, SEEK_SET);
964 for (i = 0; i < s->reloc_count; i++) {
965 struct internal_reloc n;
967 memset((PTR)&n, 0, sizeof(n));
969 n.r_vaddr = q->address + s->vma;
970 /* The 29k const/consth reloc pair is a real kludge - the consth
971 part doesn't have a symbol - it has an offset. So rebuilt
974 if (q->howto->type == R_IHCONST)
975 n.r_symndx = q->addend;
982 if (q->sym_ptr_ptr == bfd_abs_section.symbol_ptr_ptr)
984 /* This is a relocation relative to the absolute symbol */
989 n.r_symndx = get_index((*(q->sym_ptr_ptr)));
990 /* Take notice if the symbol reloc points to a symbol we don't have
991 in our symbol table. What should we do for this?? */
992 if (n.r_symndx > obj_conv_table_size (abfd))
1000 /* Work out reloc type from what is required */
1001 SELECT_RELOC(n.r_type, q->howto);
1003 n.r_type = q->howto->type;
1005 coff_swap_reloc_out(abfd, &n, &dst);
1006 bfd_write((PTR) &dst, 1, RELSZ, abfd);
1011 /* Set flags and magic number of a coff file from architecture and machine
1012 type. Result is true if we can represent the arch&type, false if not. */
1015 DEFUN(coff_set_flags,(abfd, magicp, flagsp),
1017 unsigned *magicp AND
1018 unsigned short *flagsp)
1020 switch (bfd_get_arch(abfd)) {
1024 switch (bfd_get_mach(abfd))
1026 case bfd_mach_z8001:
1029 case bfd_mach_z8002:
1043 *magicp = I960ROMAGIC;
1045 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1046 I960RWMAGIC); FIXME???
1048 switch (bfd_get_mach(abfd)) {
1049 case bfd_mach_i960_core:
1052 case bfd_mach_i960_kb_sb:
1055 case bfd_mach_i960_mc:
1058 case bfd_mach_i960_xa:
1061 case bfd_mach_i960_ca:
1064 case bfd_mach_i960_ka_sa:
1077 *magicp = I386MAGIC;
1083 *magicp = MC68MAGIC;
1090 *magicp = MC88OMAGIC;
1095 case bfd_arch_h8300:
1096 *magicp = H8300MAGIC;
1100 #ifdef A29K_MAGIC_BIG
1102 if (abfd->xvec->byteorder_big_p)
1103 *magicp = A29K_MAGIC_BIG;
1105 *magicp = A29K_MAGIC_LITTLE;
1111 case bfd_arch_we32k:
1112 *magicp = WE32KMAGIC;
1118 case bfd_arch_rs6000:
1119 *magicp = U802TOCMAGIC;
1124 default: /* Unknown architecture */
1125 /* return false; -- fall through to "return false" below, to avoid
1126 "statement never reached" errors on the one below. */
1135 DEFUN(coff_set_arch_mach,(abfd, arch, machine),
1137 enum bfd_architecture arch AND
1138 unsigned long machine)
1141 unsigned short dummy2;
1142 bfd_default_set_arch_mach(abfd, arch, machine);
1144 if (arch != bfd_arch_unknown &&
1145 coff_set_flags(abfd, &dummy1, &dummy2) != true)
1146 return false; /* We can't represent this type */
1147 return true; /* We're easy ... */
1151 /* Calculate the file position for each section. */
1154 DEFUN(coff_compute_section_file_positions,(abfd),
1158 asection *previous = (asection *)NULL;
1159 file_ptr sofar = FILHSZ;
1161 if (bfd_get_start_address(abfd))
1163 /* A start address may have been added to the original file. In this
1164 case it will need an optional header to record it. */
1165 abfd->flags |= EXEC_P;
1168 if (abfd->flags & EXEC_P)
1171 sofar += abfd->section_count * SCNHSZ;
1172 for (current = abfd->sections;
1173 current != (asection *)NULL;
1174 current = current->next) {
1176 /* Only deal with sections which have contents */
1177 if (!(current->flags & SEC_HAS_CONTENTS))
1180 /* Align the sections in the file to the same boundary on
1181 which they are aligned in virtual memory. I960 doesn't
1182 do this (FIXME) so we can stay in sync with Intel. 960
1183 doesn't yet page from files... */
1186 /* make sure this section is aligned on the right boundary - by
1187 padding the previous section up if necessary */
1190 sofar = BFD_ALIGN(sofar, 1 << current->alignment_power);
1191 if (previous != (asection *)NULL) {
1192 previous->_raw_size += sofar - old_sofar;
1197 /* FIXME, in demand paged files, the low order bits of the file
1198 offset must match the low order bits of the virtual address.
1199 "Low order" is apparently implementation defined. Add code
1200 here to round sofar up to match the virtual address. */
1202 current->filepos = sofar;
1204 sofar += current->_raw_size;
1206 /* make sure that this section is of the right size too */
1208 sofar = BFD_ALIGN(sofar, 1 << current->alignment_power);
1209 current->_raw_size += sofar - old_sofar ;
1214 obj_relocbase(abfd) = sofar;
1217 /* If .file, .text, .data, .bss symbols are missing, add them. */
1218 /* @@ Should we only be adding missing symbols, or overriding the aux
1219 values for existing section symbols? */
1221 coff_add_missing_symbols (abfd)
1224 unsigned int nsyms = bfd_get_symcount (abfd);
1225 asymbol **sympp = abfd->outsymbols;
1228 int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
1230 for (i = 0; i < nsyms; i++)
1232 coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
1236 /* only do this if there is a coff representation of the input
1238 if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
1243 name = csym->symbol.name;
1246 if (!strcmp (name, _TEXT))
1248 else if (!strcmp (name, _DATA))
1250 else if (!strcmp (name, _BSS))
1254 /* Now i == bfd_get_symcount (abfd). */
1255 /* @@ For now, don't deal with .file symbol. */
1258 if (!need_text && !need_data && !need_bss && !need_file)
1260 nsyms += need_text + need_data + need_bss + need_file;
1261 sympp2 = (asymbol**) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
1262 memcpy (sympp2, sympp, i * sizeof (asymbol *));
1265 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1269 sympp2[i++] = coff_section_symbol (abfd, _TEXT);
1271 sympp2[i++] = coff_section_symbol (abfd, _DATA);
1273 sympp2[i++] = coff_section_symbol (abfd, _BSS);
1274 BFD_ASSERT (i == nsyms);
1275 bfd_set_symtab (abfd, sympp2, nsyms);
1281 DEFUN(coff_write_object_contents,(abfd),
1287 boolean hasrelocs = false;
1288 boolean haslinno = false;
1289 file_ptr reloc_base;
1290 file_ptr lineno_base;
1294 unsigned long reloc_size = 0;
1295 unsigned long lnno_size = 0;
1296 asection *text_sec = NULL;
1297 asection *data_sec = NULL;
1298 asection *bss_sec = NULL;
1300 struct internal_filehdr internal_f;
1301 struct internal_aouthdr internal_a;
1304 bfd_error = system_call_error;
1305 /* Number the output sections, starting from one on the first section
1306 with a name which doesn't start with a *.
1307 @@ The code doesn't make this check. Is it supposed to be done,
1310 for (current = abfd->sections; current != (asection *)NULL;
1311 current = current->next)
1313 current->target_index = count;
1317 if(abfd->output_has_begun == false) {
1318 coff_compute_section_file_positions(abfd);
1321 if (abfd->sections != (asection *)NULL) {
1322 scn_base = abfd->sections->filepos;
1327 if (bfd_seek(abfd, scn_base, SEEK_SET) != 0)
1329 reloc_base = obj_relocbase(abfd);
1331 /* Make a pass through the symbol table to count line number entries and
1332 put them into the correct asections */
1334 lnno_size = coff_count_linenumbers(abfd) * LINESZ;
1335 data_base = scn_base;
1337 /* Work out the size of the reloc and linno areas */
1339 for (current = abfd->sections; current != NULL; current =
1342 /* We give section headers to +ve indexes */
1343 if (current->target_index > 0)
1346 reloc_size += current->reloc_count * RELSZ;
1347 data_base += SCNHSZ;
1352 lineno_base = reloc_base + reloc_size;
1353 sym_base = lineno_base + lnno_size;
1355 /* Indicate in each section->line_filepos its actual file address */
1356 for (current = abfd->sections; current != NULL; current =
1359 if (current->target_index > 0)
1362 if (current->lineno_count) {
1363 current->line_filepos = lineno_base;
1364 current->moving_line_filepos = lineno_base;
1365 lineno_base += current->lineno_count * LINESZ;
1368 current->line_filepos = 0;
1370 if (current->reloc_count) {
1371 current->rel_filepos = reloc_base;
1372 reloc_base += current->reloc_count * RELSZ;
1375 current->rel_filepos = 0;
1382 /* Write section headers to the file. */
1383 internal_f.f_nscns = 0;
1385 (file_ptr) ((abfd->flags & EXEC_P) ?
1386 (FILHSZ + AOUTSZ) : FILHSZ),
1391 unsigned int pad = abfd->flags & D_PAGED ? data_base : 0;
1393 unsigned int pad = 0;
1395 for (current = abfd->sections;
1397 current = current->next) {
1398 struct internal_scnhdr section;
1399 if (current->target_index > 0)
1401 internal_f.f_nscns ++;
1402 strncpy(&(section.s_name[0]), current->name, 8);
1404 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1406 if (strcmp (current->name, _LIB) == 0)
1407 section.s_vaddr = 0;
1410 section.s_vaddr = current->vma + pad;
1411 section.s_paddr = current->vma + pad;
1412 section.s_size = current->_raw_size - pad;
1414 If this section has no size or is unloadable then the scnptr
1417 if (current->_raw_size - pad == 0 ||
1418 (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0) {
1419 section.s_scnptr = 0;
1422 section.s_scnptr = current->filepos;
1424 section.s_relptr = current->rel_filepos;
1425 section.s_lnnoptr = current->line_filepos;
1426 section.s_nreloc = current->reloc_count;
1427 section.s_nlnno = current->lineno_count;
1428 if (current->reloc_count != 0)
1430 if (current->lineno_count != 0)
1433 section.s_flags = sec_to_styp_flags(current->name,current->flags);
1435 if (!strcmp(current->name, _TEXT)) {
1437 } else if (!strcmp(current->name, _DATA)) {
1439 #ifdef TWO_DATA_SECS
1440 } else if (!strcmp(current->name, ".data2")) {
1442 #endif /* TWO_DATA_SECS */
1443 } else if (!strcmp(current->name, _BSS)) {
1448 section.s_align = (current->alignment_power
1449 ? 1 << current->alignment_power
1456 coff_swap_scnhdr_out(abfd, §ion, &buff);
1457 bfd_write((PTR) (&buff), 1, SCNHSZ, abfd);
1467 /* OK, now set up the filehdr... */
1469 /* Don't include the internal abs section in the section count */
1472 We will NOT put a fucking timestamp in the header here. Every time you
1473 put it back, I will come in and take it out again. I'm sorry. This
1474 field does not belong here. We fill it with a 0 so it compares the
1477 internal_f.f_timdat = 0;
1479 if (bfd_get_symcount(abfd) != 0)
1480 internal_f.f_symptr = sym_base;
1482 internal_f.f_symptr = 0;
1484 internal_f.f_flags = 0;
1486 if (abfd->flags & EXEC_P)
1487 internal_f.f_opthdr = AOUTSZ;
1489 internal_f.f_opthdr = 0;
1492 internal_f.f_flags |= F_RELFLG;
1494 internal_f.f_flags |= F_LNNO;
1495 if (0 == bfd_get_symcount(abfd))
1496 internal_f.f_flags |= F_LSYMS;
1497 if (abfd->flags & EXEC_P)
1498 internal_f.f_flags |= F_EXEC;
1500 if (!abfd->xvec->byteorder_big_p)
1501 internal_f.f_flags |= F_AR32WR;
1503 internal_f.f_flags |= F_AR32W;
1506 FIXME, should do something about the other byte orders and
1510 /* Set up architecture-dependent stuff */
1512 { unsigned int magic = 0;
1513 unsigned short flags = 0;
1514 coff_set_flags(abfd, &magic, &flags);
1515 internal_f.f_magic = magic;
1516 internal_f.f_flags |= flags;
1517 /* ...and the "opt"hdr... */
1520 # ifdef ULTRA3 /* NYU's machine */
1521 /* FIXME: This is a bogus check. I really want to see if there
1522 * is a .shbss or a .shdata section, if so then set the magic
1523 * number to indicate a shared data executable.
1525 if (internal_f.f_nscns >= 7)
1526 internal_a.magic = SHMAGIC; /* Shared magic */
1528 # endif /* ULTRA3 */
1529 internal_a.magic = NMAGIC; /* Assume separate i/d */
1530 #define __A_MAGIC_SET__
1533 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
1534 #define __A_MAGIC_SET__
1537 #define __A_MAGIC_SET__
1538 internal_a.magic = PAGEMAGICBCS;
1542 #define __A_MAGIC_SET__
1543 /* Never was anything here for the 68k */
1544 #endif /* M68 || WE32K */
1547 # define __A_MAGIC_SET__
1548 internal_a.magic = ZMAGIC;
1552 #define __A_MAGIC_SET__
1553 internal_a.magic = (abfd->flags & D_PAGED)? RS6K_AOUTHDR_ZMAGIC:
1554 (abfd->flags & WP_TEXT)? RS6K_AOUTHDR_NMAGIC:
1555 RS6K_AOUTHDR_OMAGIC;
1558 #ifndef __A_MAGIC_SET__
1559 # include "Your aouthdr magic number is not being set!"
1561 # undef __A_MAGIC_SET__
1564 /* Now should write relocs, strings, syms */
1565 obj_sym_filepos(abfd) = sym_base;
1567 if (bfd_get_symcount(abfd) != 0) {
1568 coff_add_missing_symbols (abfd);
1569 coff_renumber_symbols(abfd);
1570 coff_mangle_symbols(abfd);
1571 coff_write_symbols(abfd);
1572 coff_write_linenumbers(abfd);
1573 coff_write_relocs(abfd);
1576 internal_a.tsize = bfd_get_section_size_before_reloc(text_sec);
1577 internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
1580 internal_a.dsize = bfd_get_section_size_before_reloc(data_sec);
1581 internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
1584 internal_a.bsize = bfd_get_section_size_before_reloc(bss_sec);
1587 internal_a.entry = bfd_get_start_address(abfd);
1588 internal_f.f_nsyms = bfd_get_symcount(abfd);
1590 /* now write them */
1591 if (bfd_seek(abfd, (file_ptr) 0, SEEK_SET) != 0)
1595 coff_swap_filehdr_out(abfd, (PTR)&internal_f, (PTR)&buff);
1596 bfd_write((PTR) &buff, 1, FILHSZ, abfd);
1598 if (abfd->flags & EXEC_P) {
1600 coff_swap_aouthdr_out(abfd, (PTR)&internal_a, (PTR)&buff);
1601 bfd_write((PTR) &buff, 1, AOUTSZ, abfd);
1607 DEFUN(coff_set_section_contents,(abfd, section, location, offset, count),
1612 bfd_size_type count)
1614 if (abfd->output_has_begun == false) /* set by bfd.c handler */
1615 coff_compute_section_file_positions(abfd);
1618 /* If this is a .lib section, bump the vma address so that it
1619 winds up being the number of .lib sections output. This is
1620 right for SVR3.2. Shared libraries should probably get more
1622 if (strcmp (section->name, _LIB) == 0)
1626 bfd_seek(abfd, (file_ptr) (section->filepos + offset), SEEK_SET);
1629 return (bfd_write(location, 1, count, abfd) == count) ? true : false;
1635 coff_close_and_cleanup(abfd)
1638 if (!bfd_read_p(abfd))
1639 switch (abfd->format) {
1641 if (!_bfd_write_archive_contents(abfd))
1645 if (!coff_write_object_contents(abfd))
1649 bfd_error = invalid_operation;
1653 /* We depend on bfd_close to free all the memory on the obstack. */
1654 /* FIXME if bfd_release is not using obstacks! */
1661 buy_and_read(abfd, where, seek_direction, size)
1667 PTR area = (PTR) bfd_alloc(abfd, size);
1669 bfd_error = no_memory;
1672 bfd_seek(abfd, where, seek_direction);
1673 if (bfd_read(area, 1, size, abfd) != size) {
1674 bfd_error = system_call_error;
1678 } /* buy_and_read() */
1684 Creating the linenumber table is done by reading in the entire
1685 coff linenumber table, and creating another table for internal use.
1687 A coff line number table is structured so that each function
1688 is marked as having a line number of 0. Each line within the
1689 function is an offset from the first line in the function. The
1690 base of the line number information for the table is stored in
1691 the symbol associated with the function.
1693 The information is copied from the external to the internal
1694 table, and each symbol which marks a function is marked by
1697 How does this work ?
1702 coff_slurp_line_table(abfd, asect)
1706 LINENO *native_lineno;
1707 alent *lineno_cache;
1709 BFD_ASSERT(asect->lineno == (alent *) NULL);
1711 native_lineno = (LINENO *) buy_and_read(abfd,
1712 asect->line_filepos,
1715 asect->lineno_count));
1717 (alent *) bfd_alloc(abfd, (size_t) ((asect->lineno_count + 1) * sizeof(alent)));
1718 if (lineno_cache == NULL) {
1719 bfd_error = no_memory;
1722 unsigned int counter = 0;
1723 alent *cache_ptr = lineno_cache;
1724 LINENO *src = native_lineno;
1726 while (counter < asect->lineno_count) {
1727 struct internal_lineno dst;
1728 coff_swap_lineno_in(abfd, src, &dst);
1729 cache_ptr->line_number = dst.l_lnno;
1731 if (cache_ptr->line_number == 0) {
1732 coff_symbol_type *sym =
1733 (coff_symbol_type *) (dst.l_addr.l_symndx
1734 + obj_raw_syments(abfd))->u.syment._n._n_n._n_zeroes;
1735 cache_ptr->u.sym = (asymbol *) sym;
1736 sym->lineno = cache_ptr;
1739 cache_ptr->u.offset = dst.l_addr.l_paddr
1740 - bfd_section_vma(abfd, asect);
1741 } /* If no linenumber expect a symbol index */
1747 cache_ptr->line_number = 0;
1750 asect->lineno = lineno_cache;
1751 /* FIXME, free native_lineno here, or use alloca or something. */
1753 } /* coff_slurp_line_table() */
1756 DEFUN(coff_slurp_symbol_table,(abfd),
1759 combined_entry_type *native_symbols;
1760 coff_symbol_type *cached_area;
1761 unsigned int *table_ptr;
1763 unsigned int number_of_symbols = 0;
1764 if (obj_symbols(abfd))
1766 bfd_seek(abfd, obj_sym_filepos(abfd), SEEK_SET);
1768 /* Read in the symbol table */
1769 if ((native_symbols = coff_get_normalized_symtab(abfd)) == NULL) {
1773 /* Allocate enough room for all the symbols in cached form */
1775 (coff_symbol_type *)
1776 bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(coff_symbol_type)));
1778 if (cached_area == NULL) {
1779 bfd_error = no_memory;
1784 bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(unsigned int)));
1786 if (table_ptr == NULL) {
1787 bfd_error = no_memory;
1792 coff_symbol_type *dst = cached_area;
1793 unsigned int last_native_index = bfd_get_symcount(abfd);
1794 unsigned int this_index = 0;
1795 while (this_index < last_native_index) {
1796 combined_entry_type *src = native_symbols + this_index;
1797 table_ptr[this_index] = number_of_symbols;
1798 dst->symbol.the_bfd = abfd;
1800 dst->symbol.name = (char *)(src->u.syment._n._n_n._n_offset);
1802 We use the native name field to point to the cached field
1804 src->u.syment._n._n_n._n_zeroes = (int) dst;
1805 dst->symbol.section = coff_section_from_bfd_index(abfd,
1806 src->u.syment.n_scnum);
1807 dst->symbol.flags = 0;
1808 dst->done_lineno = false;
1810 switch (src->u.syment.n_sclass) {
1814 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
1815 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
1816 dst->symbol.flags |= BSF_NOT_AT_END;
1818 /* Fall through to next case */
1826 if ((src->u.syment.n_scnum) == 0) {
1827 if ((src->u.syment.n_value) == 0) {
1828 dst->symbol.section = &bfd_und_section;
1829 dst->symbol.value= 0;
1832 dst->symbol.section = &bfd_com_section;
1833 dst->symbol.value = (src->u.syment.n_value);
1838 Base the value as an index from the base of the
1842 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
1843 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
1845 if (ISFCN((src->u.syment.n_type))) {
1847 A function ext does not go at the end of a file
1849 dst->symbol.flags |= BSF_NOT_AT_END;
1856 case C_STAT: /* static */
1858 case C_LEAFSTAT: /* static leaf procedure */
1860 case C_LABEL: /* label */
1861 if (src->u.syment.n_scnum == -2)
1862 dst->symbol.flags = BSF_DEBUGGING;
1864 dst->symbol.flags = BSF_LOCAL;
1866 Base the value as an index from the base of the section, if
1869 if (dst->symbol.section)
1870 dst->symbol.value = (src->u.syment.n_value) -
1871 dst->symbol.section->vma;
1873 dst->symbol.value = (src->u.syment.n_value) ;
1876 case C_MOS: /* member of structure */
1877 case C_EOS: /* end of structure */
1878 #ifdef NOTDEF /* C_AUTOARG has the same value */
1880 case C_GLBLREG: /* A29k-specific storage class */
1883 case C_REGPARM: /* register parameter */
1884 case C_REG: /* register variable */
1886 case C_AUTOARG: /* 960-specific storage class */
1888 case C_TPDEF: /* type definition */
1890 case C_AUTO: /* automatic variable */
1891 case C_FIELD: /* bit field */
1892 case C_ENTAG: /* enumeration tag */
1893 case C_MOE: /* member of enumeration */
1894 case C_MOU: /* member of union */
1895 case C_UNTAG: /* union tag */
1896 dst->symbol.flags = BSF_DEBUGGING;
1897 dst->symbol.value = (src->u.syment.n_value);
1900 case C_FILE: /* file name */
1901 case C_STRTAG: /* structure tag */
1903 case C_BINCL: /* beginning of include file */
1904 case C_EINCL: /* ending of include file */
1917 dst->symbol.flags = BSF_DEBUGGING;
1918 dst->symbol.value = (src->u.syment.n_value);
1921 case C_BLOCK: /* ".bb" or ".eb" */
1922 case C_FCN: /* ".bf" or ".ef" */
1923 case C_EFCN: /* physical end of function */
1924 dst->symbol.flags = BSF_LOCAL;
1926 Base the value as an index from the base of the section
1928 dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma;
1932 case C_EXTDEF: /* external definition */
1933 case C_ULABEL: /* undefined label */
1934 case C_USTATIC: /* undefined static */
1935 case C_LINE: /* line # reformatted as symbol table entry */
1936 case C_ALIAS: /* duplicate tag */
1937 case C_HIDDEN: /* ext symbol in dmert public lib */
1940 fprintf(stderr,"Unrecognized storage class %d\n",
1941 src->u.syment.n_sclass);
1943 dst->symbol.flags = BSF_DEBUGGING;
1944 dst->symbol.value = (src->u.syment.n_value);
1948 /* BFD_ASSERT(dst->symbol.flags != 0);*/
1952 dst->symbol.udata = 0;
1953 dst->lineno = (alent *) NULL;
1954 this_index += (src->u.syment.n_numaux) + 1;
1956 number_of_symbols++;
1957 } /* walk the native symtab */
1958 } /* bfdize the native symtab */
1960 obj_symbols(abfd) = cached_area;
1961 obj_raw_syments(abfd) = native_symbols;
1963 obj_conv_table_size (abfd) = bfd_get_symcount (abfd);
1964 bfd_get_symcount(abfd) = number_of_symbols;
1965 obj_convert(abfd) = table_ptr;
1966 /* Slurp the line tables for each section too */
1971 coff_slurp_line_table(abfd, p);
1976 } /* coff_slurp_symbol_table() */
1982 Coff relocations are easily transformed into the internal BFD form
1985 Reading a coff relocation table is done in the following stages:
1987 o The entire coff relocation table is read into memory.
1989 o Each relocation is processed in turn, first it is swapped from the
1990 external to the internal form.
1992 o The symbol referenced in the relocation's symbol index is
1993 turned intoa pointer into the canonical symbol table. Note
1994 that this table is the same as the one returned by a call to
1995 @code{bfd_canonicalize_symtab}. The back end will call the
1996 routine and save the result if a canonicalization hasn't been done.
1998 o The reloc index is turned into a pointer to a howto
1999 structure, in a back end specific way. For instance, the 386
2000 and 960 use the @code{r_type} to directly produce an index
2001 into a howto table vector; the 88k subtracts a number from the
2002 @code{r_type} field and creates an addend field.
2008 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2009 if (ptr && bfd_asymbol_bfd(ptr) == abfd \
2010 && ((ptr->flags & BSF_OLD_COMMON)== 0)) \
2012 cache_ptr->addend = -(ptr->section->vma + ptr->value); \
2015 cache_ptr->addend = 0; \
2020 DEFUN(coff_slurp_reloc_table,(abfd, asect, symbols),
2025 RELOC *native_relocs;
2026 arelent *reloc_cache;
2031 if (asect->relocation)
2033 if (asect->reloc_count == 0)
2035 if (asect->flags & SEC_CONSTRUCTOR)
2037 if (!coff_slurp_symbol_table(abfd))
2040 (RELOC *) buy_and_read(abfd,
2044 asect->reloc_count));
2045 reloc_cache = (arelent *)
2046 bfd_alloc(abfd, (size_t) (asect->reloc_count * sizeof(arelent)));
2048 if (reloc_cache == NULL) {
2049 bfd_error = no_memory;
2054 for (idx = 0; idx < asect->reloc_count; idx ++)
2056 #ifdef RELOC_PROCESSING
2057 struct internal_reloc dst;
2058 struct external_reloc *src;
2060 cache_ptr = reloc_cache + idx;
2061 src = native_relocs + idx;
2062 bfd_swap_reloc_in(abfd, src, &dst);
2064 RELOC_PROCESSING(cache_ptr, &dst, symbols, abfd, asect);
2066 struct internal_reloc dst;
2068 struct external_reloc *src;
2070 cache_ptr = reloc_cache + idx;
2071 src = native_relocs + idx;
2073 bfd_swap_reloc_in(abfd, src, &dst);
2076 cache_ptr->address = dst.r_vaddr;
2078 if (dst.r_symndx != -1)
2080 /* @@ Should never be greater than count of symbols! */
2081 if (dst.r_symndx >= obj_conv_table_size (abfd))
2083 cache_ptr->sym_ptr_ptr = symbols + obj_convert(abfd)[dst.r_symndx];
2084 ptr = *(cache_ptr->sym_ptr_ptr);
2088 cache_ptr->sym_ptr_ptr= bfd_abs_section.symbol_ptr_ptr;
2093 The symbols definitions that we have read in have been
2094 relocated as if their sections started at 0. But the offsets
2095 refering to the symbols in the raw data have not been
2096 modified, so we have to have a negative addend to compensate.
2098 Note that symbols which used to be common must be left alone */
2100 /* Calculate any reloc addend by looking at the symbol */
2101 CALC_ADDEND(abfd, ptr, dst, cache_ptr);
2103 cache_ptr->address -= asect->vma;
2104 /* !! cache_ptr->section = (asection *) NULL;*/
2106 /* Fill in the cache_ptr->howto field from dst.r_type */
2107 RTYPE2HOWTO(cache_ptr, &dst);
2112 asect->relocation = reloc_cache;
2117 /* This is stupid. This function should be a boolean predicate */
2119 DEFUN(coff_canonicalize_reloc, (abfd, section, relptr, symbols),
2122 arelent **relptr AND
2125 arelent *tblptr = section->relocation;
2126 unsigned int count = 0;
2129 if (section->flags & SEC_CONSTRUCTOR)
2131 /* this section has relocs made up by us, they are not in the
2132 file, so take them out of their chain and place them into
2133 the data area provided */
2134 arelent_chain *chain = section->constructor_chain;
2135 for (count = 0; count < section->reloc_count; count ++)
2137 *relptr ++ = &chain->relent;
2138 chain = chain->next;
2144 coff_slurp_reloc_table(abfd, section, symbols);
2147 tblptr = section->relocation;
2151 for (; count++ < section->reloc_count;)
2152 *relptr++ = tblptr++;
2157 return section->reloc_count;
2162 coff_sym_filepos(abfd)
2165 return obj_sym_filepos(abfd);
2169 #ifndef coff_reloc16_extra_cases
2170 #define coff_reloc16_extra_cases \
2171 (void (*) PARAMS ((bfd *, bfd_seclet_type *, arelent *, bfd_byte *,\
2172 unsigned int *, unsigned int *))) abort
2175 static CONST bfd_coff_backend_data bfd_coff_std_swap_table = {
2176 coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
2177 coff_swap_aux_out, coff_swap_sym_out,
2178 coff_swap_lineno_out, coff_swap_reloc_out,
2179 coff_swap_filehdr_out, coff_swap_aouthdr_out,
2180 coff_swap_scnhdr_out,
2181 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, LINESZ,
2182 #ifdef COFF_LONG_FILENAMES
2187 coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
2188 coff_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook,
2189 styp_to_sec_flags, coff_make_section_hook, coff_set_alignment_hook,
2190 coff_slurp_symbol_table, symname_in_debug_hook, coff_reloc16_extra_cases
2193 #define coff_core_file_failing_command _bfd_dummy_core_file_failing_command
2194 #define coff_core_file_failing_signal _bfd_dummy_core_file_failing_signal
2195 #define coff_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
2196 #define coff_slurp_armap bfd_slurp_coff_armap
2197 #define coff_slurp_extended_name_table _bfd_slurp_extended_name_table
2198 #define coff_truncate_arname bfd_dont_truncate_arname
2199 #define coff_openr_next_archived_file bfd_generic_openr_next_archived_file
2200 #define coff_generic_stat_arch_elt bfd_generic_stat_arch_elt
2201 #define coff_get_section_contents bfd_generic_get_section_contents
2202 #define coff_close_and_cleanup bfd_generic_close_and_cleanup
2204 #define coff_bfd_debug_info_start bfd_void
2205 #define coff_bfd_debug_info_end bfd_void
2206 #define coff_bfd_debug_info_accumulate \
2207 (void (*) PARAMS ((bfd *, struct sec *))) bfd_void
2208 #define coff_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
2209 #define coff_bfd_relax_section bfd_generic_relax_section
2210 #define coff_bfd_seclet_link bfd_generic_seclet_link