1 /* Internal format of XCOFF object file data structures for BFD.
3 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001
4 Free Software Foundation, Inc.
5 Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23 #ifndef _INTERNAL_XCOFF_H
24 #define _INTERNAL_XCOFF_H
28 /* Names of "special" sections. */
33 #define _LOADER ".loader"
35 /* XCOFF uses a special .loader section with type STYP_LOADER. */
36 #define STYP_LOADER 0x1000
38 /* XCOFF uses a special .debug section with type STYP_DEBUG. */
39 #define STYP_DEBUG 0x2000
41 /* XCOFF handles line number or relocation overflow by creating
42 another section header with STYP_OVRFLO set. */
43 #define STYP_OVRFLO 0x8000
45 #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */
46 #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */
47 #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */
49 /* XCOFF relocation types.
50 The relocations are described in the function
51 xcoff[64]_ppc_relocate_section in coff64-rs6000.c and coff-rs6000.c */
67 #define R_RRTBI (0x14)
68 #define R_RRTBA (0x15)
76 /* Storage class #defines, from /usr/include/storclass.h that are not already
77 defined in internal.h */
79 /* Comment string in .info section */
82 /* Auxillary Symbol Entries */
85 #define SMTYP_ALIGN(x) ((x) >> 3) /* log2 of alignment */
86 #define SMTYP_SMTYP(x) ((x) & 0x7) /* symbol type */
87 /* Symbol type values: */
88 #define XTY_ER 0 /* External reference */
89 #define XTY_SD 1 /* Csect definition */
90 #define XTY_LD 2 /* Label definition */
91 #define XTY_CM 3 /* .BSS */
92 #define XTY_EM 4 /* Error message */
93 #define XTY_US 5 /* "Reserved for internal use" */
95 /* x_smclas values: */
96 #define XMC_PR 0 /* Read-only program code */
97 #define XMC_RO 1 /* Read-only constant */
98 #define XMC_DB 2 /* Read-only debug dictionary table */
99 #define XMC_TC 3 /* Read-write general TOC entry */
100 #define XMC_UA 4 /* Read-write unclassified */
101 #define XMC_RW 5 /* Read-write data */
102 #define XMC_GL 6 /* Read-only global linkage */
103 #define XMC_XO 7 /* Read-only extended operation */
104 #define XMC_SV 8 /* Read-only supervisor call */
105 #define XMC_BS 9 /* Read-write BSS */
106 #define XMC_DS 10 /* Read-write descriptor csect */
107 #define XMC_UC 11 /* Read-write unnamed Fortran common */
108 #define XMC_TI 12 /* Read-only traceback index csect */
109 #define XMC_TB 13 /* Read-only traceback table csect */
111 #define XMC_TC0 15 /* Read-write TOC anchor */
112 #define XMC_TD 16 /* Read-write data in TOC */
113 #define XMC_SV64 17 /* Read-only 64 bit supervisor call */
114 #define XMC_SV3264 18 /* Read-only 32 or 64 bit supervisor call */
116 /* The ldhdr structure. This appears at the start of the .loader
119 struct internal_ldhdr
121 /* The version number:
124 unsigned long l_version
;
126 /* The number of symbol table entries. */
127 bfd_size_type l_nsyms
;
129 /* The number of relocation table entries. */
130 bfd_size_type l_nreloc
;
132 /* The length of the import file string table. */
133 bfd_size_type l_istlen
;
135 /* The number of import files. */
136 bfd_size_type l_nimpid
;
138 /* The offset from the start of the .loader section to the first
139 entry in the import file table. */
140 bfd_size_type l_impoff
;
142 /* The length of the string table. */
143 bfd_size_type l_stlen
;
145 /* The offset from the start of the .loader section to the first
146 entry in the string table. */
147 bfd_size_type l_stoff
;
149 /* The offset to start of the symbol table, only in XCOFF64 */
152 /* The offset to the start of the relocation table, only in XCOFF64 */
156 /* The ldsym structure. This is used to represent a symbol in the
159 struct internal_ldsym
163 /* The symbol name if <= SYMNMLEN characters. */
164 char _l_name
[SYMNMLEN
];
167 /* Zero if the symbol name is more than SYMNMLEN characters. */
170 /* The offset in the string table if the symbol name is more
171 than SYMNMLEN characters. */
178 /* The symbol value. */
181 /* The symbol section number. */
184 /* The symbol type and flags. */
187 /* The symbol storage class. */
190 /* The import file ID. */
191 bfd_size_type l_ifile
;
193 /* Offset to the parameter type check string. */
194 bfd_size_type l_parm
;
197 /* These flags are for the l_smtype field (the lower three bits are an
200 /* Imported symbol. */
201 #define L_IMPORT (0x40)
203 #define L_ENTRY (0x20)
204 /* Exported symbol. */
205 #define L_EXPORT (0x10)
207 /* The ldrel structure. This is used to represent a reloc in the
210 struct internal_ldrel
212 /* The reloc address. */
215 /* The symbol table index in the .loader section symbol table. */
216 bfd_size_type l_symndx
;
218 /* The relocation type and size. */
221 /* The section number this relocation applies to. */
225 /* An entry in the XCOFF linker hash table. */
226 struct xcoff_link_hash_entry
228 struct bfd_link_hash_entry root
;
230 /* Symbol index in output file. Set to -1 initially. Set to -2 if
231 there is a reloc against this symbol. */
234 /* If we have created a TOC entry for this symbol, this is the .tc
235 section which holds it. */
236 asection
*toc_section
;
240 /* If we have created a TOC entry (the XCOFF_SET_TOC flag is
241 set), this is the offset in toc_section. */
244 /* If the TOC entry comes from an input file, this is set to the
245 symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */
250 /* If this symbol is a function entry point which is called, this
251 field holds a pointer to the function descriptor. If this symbol
252 is a function descriptor, this field holds a pointer to the
253 function entry point. */
254 struct xcoff_link_hash_entry
*descriptor
;
256 /* The .loader symbol table entry, if there is one. */
257 struct internal_ldsym
*ldsym
;
259 /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table
260 index. If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set,
261 this is the l_ifile value. */
264 /* Some linker flags. */
267 /* The storage mapping class. */
268 unsigned char smclas
;
271 /* Flags for xcoff_link_hash_entry. */
273 /* Symbol is referenced by a regular object. */
274 #define XCOFF_REF_REGULAR 0x00000001
275 /* Symbol is defined by a regular object. */
276 #define XCOFF_DEF_REGULAR 0x00000002
277 /* Symbol is defined by a dynamic object. */
278 #define XCOFF_DEF_DYNAMIC 0x00000004
279 /* Symbol is used in a reloc being copied into the .loader section. */
280 #define XCOFF_LDREL 0x00000008
281 /* Symbol is the entry point. */
282 #define XCOFF_ENTRY 0x00000010
283 /* Symbol is called; this is, it appears in a R_BR reloc. */
284 #define XCOFF_CALLED 0x00000020
285 /* Symbol needs the TOC entry filled in. */
286 #define XCOFF_SET_TOC 0x00000040
287 /* Symbol is explicitly imported. */
288 #define XCOFF_IMPORT 0x00000080
289 /* Symbol is explicitly exported. */
290 #define XCOFF_EXPORT 0x00000100
291 /* Symbol has been processed by xcoff_build_ldsyms. */
292 #define XCOFF_BUILT_LDSYM 0x00000200
293 /* Symbol is mentioned by a section which was not garbage collected. */
294 #define XCOFF_MARK 0x00000400
295 /* Symbol size is recorded in size_list list from hash table. */
296 #define XCOFF_HAS_SIZE 0x00000800
297 /* Symbol is a function descriptor. */
298 #define XCOFF_DESCRIPTOR 0x00001000
299 /* Multiple definitions have been for the symbol. */
300 #define XCOFF_MULTIPLY_DEFINED 0x00002000
301 /* Symbol is the __rtinit symbol. */
302 #define XCOFF_RTINIT 0x00004000
303 /* Symbol is an imported 32 bit syscall. */
304 #define XCOFF_SYSCALL32 0x00008000
305 /* Symbol is an imported 64 bit syscall. */
306 #define XCOFF_SYSCALL64 0x00010000
308 /* The XCOFF linker hash table. */
310 #define XCOFF_NUMBER_OF_SPECIAL_SECTIONS 6
311 #define XCOFF_SPECIAL_SECTION_TEXT 0
312 #define XCOFF_SPECIAL_SECTION_ETEXT 1
313 #define XCOFF_SPECIAL_SECTION_DATA 2
314 #define XCOFF_SPECIAL_SECTION_EDATA 3
315 #define XCOFF_SPECIAL_SECTION_END 4
316 #define XCOFF_SPECIAL_SECTION_END2 5
318 struct xcoff_link_hash_table
320 struct bfd_link_hash_table root
;
322 /* The .debug string hash table. We need to compute this while
323 reading the input files, so that we know how large the .debug
324 section will be before we assign section positions. */
325 struct bfd_strtab_hash
*debug_strtab
;
327 /* The .debug section we will use for the final output. */
328 asection
*debug_section
;
330 /* The .loader section we will use for the final output. */
331 asection
*loader_section
;
333 /* A count of non TOC relative relocs which will need to be
334 allocated in the .loader section. */
337 /* The .loader section header. */
338 struct internal_ldhdr ldhdr
;
340 /* The .gl section we use to hold global linkage code. */
341 asection
*linkage_section
;
343 /* The .tc section we use to hold toc entries we build for global
345 asection
*toc_section
;
347 /* The .ds section we use to hold function descriptors which we
348 create for exported symbols. */
349 asection
*descriptor_section
;
351 /* The list of import files. */
352 struct xcoff_import_file
*imports
;
354 /* Required alignment of sections within the output file. */
355 unsigned long file_align
;
357 /* Whether the .text section must be read-only. */
360 /* Whether garbage collection was done. */
363 /* A linked list of symbols for which we have size information. */
364 struct xcoff_link_size_list
366 struct xcoff_link_size_list
*next
;
367 struct xcoff_link_hash_entry
*h
;
372 /* Magic sections: _text, _etext, _data, _edata, _end, end. */
373 asection
*special_sections
[XCOFF_NUMBER_OF_SPECIAL_SECTIONS
];
377 /* This structure is used to pass information through
378 xcoff_link_hash_traverse. */
380 struct xcoff_loader_info
382 /* Set if a problem occurred. */
388 /* Link information structure. */
389 struct bfd_link_info
*info
;
391 /* Whether all defined symbols should be exported. */
392 boolean export_defineds
;
394 /* Number of ldsym structures. */
397 /* Size of string table. */
403 /* Allocated size of string table. */
407 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
408 from smaller values. Start with zero, widen, *then* decrement. */
409 #define MINUS_ONE (((bfd_vma) 0) - 1)
411 /* __rtinit, from /usr/include/rtinit.h. */
414 /* Pointer to runtime linker.
415 XXX: Is the parameter really void? */
416 int (*rtl
) PARAMS ((void));
418 /* Offset to array of init functions, 0 if none. */
421 /* Offset to array of fini functions, 0 if none. */
424 /* Size of __RTINIT_DESCRIPTOR. This value should be used instead of
425 sizeof(__RTINIT_DESCRIPTOR). */
426 int __rtinit_descriptor_size
;
429 #define RTINIT_DESCRIPTOR_SIZE (12)
431 struct __rtinit_descriptor
433 /* Init/fini function. */
436 /* Offset, relative to the start of the __rtinit symbol, to name of the
447 #define XCOFFARMAG "<aiaff>\012"
448 #define XCOFFARMAGBIG "<bigaf>\012"
449 #define SXCOFFARMAG 8
451 /* This terminates an XCOFF archive member name. */
453 #define XCOFFARFMAG "`\012"
454 #define SXCOFFARFMAG 2
456 /* XCOFF archives start with this (printable) structure. */
458 struct xcoff_ar_file_hdr
461 char magic
[SXCOFFARMAG
];
463 /* Offset of the member table (decimal ASCII string). */
466 /* Offset of the global symbol table (decimal ASCII string). */
469 /* Offset of the first member in the archive (decimal ASCII string). */
470 char firstmemoff
[12];
472 /* Offset of the last member in the archive (decimal ASCII string). */
475 /* Offset of the first member on the free list (decimal ASCII
480 #define SIZEOF_AR_FILE_HDR (5 * 12 + SXCOFFARMAG)
482 /* This is the equivalent data structure for the big archive format. */
484 struct xcoff_ar_file_hdr_big
487 char magic
[SXCOFFARMAG
];
489 /* Offset of the member table (decimal ASCII string). */
492 /* Offset of the global symbol table for 32-bit objects (decimal ASCII
496 /* Offset of the global symbol table for 64-bit objects (decimal ASCII
500 /* Offset of the first member in the archive (decimal ASCII string). */
501 char firstmemoff
[20];
503 /* Offset of the last member in the archive (decimal ASCII string). */
506 /* Offset of the first member on the free list (decimal ASCII
511 #define SIZEOF_AR_FILE_HDR_BIG (6 * 20 + SXCOFFARMAG)
514 /* Each XCOFF archive member starts with this (printable) structure. */
518 /* File size not including the header (decimal ASCII string). */
521 /* File offset of next archive member (decimal ASCII string). */
524 /* File offset of previous archive member (decimal ASCII string). */
527 /* File mtime (decimal ASCII string). */
530 /* File UID (decimal ASCII string). */
533 /* File GID (decimal ASCII string). */
536 /* File mode (octal ASCII string). */
539 /* Length of file name (decimal ASCII string). */
542 /* This structure is followed by the file name. The length of the
543 name is given in the namlen field. If the length of the name is
544 odd, the name is followed by a null byte. The name and optional
545 null byte are followed by XCOFFARFMAG, which is not included in
546 namlen. The contents of the archive member follow; the number of
547 bytes is given in the size field. */
550 #define SIZEOF_AR_HDR (7 * 12 + 4)
552 /* The equivalent for the big archive format. */
554 struct xcoff_ar_hdr_big
556 /* File size not including the header (decimal ASCII string). */
559 /* File offset of next archive member (decimal ASCII string). */
562 /* File offset of previous archive member (decimal ASCII string). */
565 /* File mtime (decimal ASCII string). */
568 /* File UID (decimal ASCII string). */
571 /* File GID (decimal ASCII string). */
574 /* File mode (octal ASCII string). */
577 /* Length of file name (decimal ASCII string). */
580 /* This structure is followed by the file name. The length of the
581 name is given in the namlen field. If the length of the name is
582 odd, the name is followed by a null byte. The name and optional
583 null byte are followed by XCOFFARFMAG, which is not included in
584 namlen. The contents of the archive member follow; the number of
585 bytes is given in the size field. */
588 #define SIZEOF_AR_HDR_BIG (3 * 20 + 4 * 12 + 4)
590 /* We often have to distinguish between the old and big file format.
591 Make it a bit cleaner. We can use `xcoff_ardata' here because the
592 `hdr' member has the same size and position in both formats. */
593 #define xcoff_big_format_p(abfd) \
594 (xcoff_ardata (abfd)->magic[1] == 'b')
596 /* We store a copy of the xcoff_ar_file_hdr in the tdata field of the
597 artdata structure. Similar for the big archive. */
598 #define xcoff_ardata(abfd) \
599 ((struct xcoff_ar_file_hdr *) bfd_ardata (abfd)->tdata)
600 #define xcoff_ardata_big(abfd) \
601 ((struct xcoff_ar_file_hdr_big *) bfd_ardata (abfd)->tdata)
603 /* We store a copy of the xcoff_ar_hdr in the arelt_data field of an
604 archive element. Similar for the big archive. */
605 #define arch_eltdata(bfd) ((struct areltdata *) ((bfd)->arelt_data))
606 #define arch_xhdr(bfd) \
607 ((struct xcoff_ar_hdr *) arch_eltdata (bfd)->arch_header)
608 #define arch_xhdr_big(bfd) \
609 ((struct xcoff_ar_hdr_big *) arch_eltdata (bfd)->arch_header)
611 #endif /* _INTERNAL_XCOFF_H */