1/* IBM RS/6000 "XCOFF" file definitions for BFD.
2   Copyright (C) 1990-2014 Free Software Foundation, Inc.
3   Written by Mimi Phuong-Thao Vo of IBM
4   and John Gilmore of Cygnus Support.
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 3 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program; if not, write to the Free Software
18   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19   MA 02110-1301, USA.  */
20
21/********************** FILE HEADER **********************/
22
23struct external_filehdr {
24	char f_magic[2];	/* magic number			*/
25	char f_nscns[2];	/* number of sections		*/
26	char f_timdat[4];	/* time & date stamp		*/
27	char f_symptr[4];	/* file pointer to symtab	*/
28	char f_nsyms[4];	/* number of symtab entries	*/
29	char f_opthdr[2];	/* sizeof(optional hdr)		*/
30	char f_flags[2];	/* flags			*/
31};
32
33        /* IBM RS/6000 */
34#define U802WRMAGIC     0730    /* writeable text segments **chh**      */
35#define U802ROMAGIC     0735    /* readonly sharable text segments      */
36#define U802TOCMAGIC    0737    /* readonly text segments and TOC       */
37
38#define BADMAG(x)	\
39	((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \
40	 (x).f_magic != U802TOCMAGIC)
41
42#define	FILHDR	struct external_filehdr
43#define	FILHSZ	20
44
45
46/********************** AOUT "OPTIONAL HEADER" **********************/
47
48
49typedef struct
50{
51  unsigned char	magic[2];	/* type of file			*/
52  unsigned char	vstamp[2];	/* version stamp		*/
53  unsigned char	tsize[4];	/* text size in bytes, padded to FW bdry */
54  unsigned char	dsize[4];	/* initialized data "  "	*/
55  unsigned char	bsize[4];	/* uninitialized data "   "	*/
56  unsigned char	entry[4];	/* entry pt.			*/
57  unsigned char	text_start[4];	/* base of text used for this file */
58  unsigned char	data_start[4];	/* base of data used for this file */
59  unsigned char	o_toc[4];	/* address of TOC */
60  unsigned char	o_snentry[2];	/* section number of entry point */
61  unsigned char	o_sntext[2];	/* section number of .text section */
62  unsigned char	o_sndata[2];	/* section number of .data section */
63  unsigned char	o_sntoc[2];	/* section number of TOC */
64  unsigned char	o_snloader[2];	/* section number of .loader section */
65  unsigned char	o_snbss[2];	/* section number of .bss section */
66  unsigned char	o_algntext[2];	/* .text alignment */
67  unsigned char	o_algndata[2];	/* .data alignment */
68  unsigned char	o_modtype[2];	/* module type (??) */
69  unsigned char o_cputype[2];	/* cpu type */
70  unsigned char	o_maxstack[4];	/* max stack size (??) */
71  unsigned char o_maxdata[4];	/* max data size (??) */
72  unsigned char	o_resv2[12];	/* reserved */
73}
74AOUTHDR;
75
76#define AOUTSZ 72
77#define SMALL_AOUTSZ (28)
78#define AOUTHDRSZ 72
79
80/********************** SECTION HEADER **********************/
81
82
83struct external_scnhdr {
84	char		s_name[8];	/* section name			*/
85	char		s_paddr[4];	/* physical address, aliased s_nlib */
86	char		s_vaddr[4];	/* virtual address		*/
87	char		s_size[4];	/* section size			*/
88	char		s_scnptr[4];	/* file ptr to raw data for section */
89	char		s_relptr[4];	/* file ptr to relocation	*/
90	char		s_lnnoptr[4];	/* file ptr to line numbers	*/
91	char		s_nreloc[2];	/* number of relocation entries	*/
92	char		s_nlnno[2];	/* number of line number entries*/
93	char		s_flags[4];	/* flags			*/
94};
95
96#define	SCNHDR	struct external_scnhdr
97#define	SCNHSZ	40
98
99/********************** LINE NUMBERS **********************/
100
101/* 1 line number entry for every "breakpointable" source line in a section.
102 * Line numbers are grouped on a per function basis; first entry in a function
103 * grouping will have l_lnno = 0 and in place of physical address will be the
104 * symbol table index of the function name.
105 */
106struct external_lineno {
107	union {
108		char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
109		char l_paddr[4];	/* (physical) address of line number	*/
110	} l_addr;
111	char l_lnno[2];	/* line number		*/
112};
113
114
115#define	LINENO	struct external_lineno
116#define	LINESZ	6
117
118
119/********************** SYMBOLS **********************/
120
121#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
122#define E_FILNMLEN	14	/* # characters in a file name		*/
123#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
124
125struct external_syment
126{
127  union {
128    char e_name[E_SYMNMLEN];
129    struct {
130      char e_zeroes[4];
131      char e_offset[4];
132    } e;
133  } e;
134  char e_value[4];
135  char e_scnum[2];
136  char e_type[2];
137  char e_sclass[1];
138  char e_numaux[1];
139};
140
141
142
143#define N_BTMASK	(017)
144#define N_TMASK		(060)
145#define N_BTSHFT	(4)
146#define N_TSHIFT	(2)
147
148
149union external_auxent {
150	struct {
151		char x_tagndx[4];	/* str, un, or enum tag indx */
152		union {
153			struct {
154			    char  x_lnno[2]; /* declaration line number */
155			    char  x_size[2]; /* str/union/array size */
156			} x_lnsz;
157			char x_fsize[4];	/* size of function */
158		} x_misc;
159		union {
160			struct {		/* if ISFCN, tag, or .bb */
161			    char x_lnnoptr[4];	/* ptr to fcn line # */
162			    char x_endndx[4];	/* entry ndx past block end */
163			} x_fcn;
164			struct {		/* if ISARY, up to 4 dimen. */
165			    char x_dimen[E_DIMNUM][2];
166			} x_ary;
167		} x_fcnary;
168		char x_tvndx[2];		/* tv index */
169	} x_sym;
170
171        struct {
172                union {
173                        char x_fname[E_FILNMLEN];
174                        struct {
175                                char x_zeroes[4];
176                                char x_offset[4];
177                        } x_n;
178                } x_n;
179                char x_ftype[1];
180        } x_file;
181
182	struct {
183		char x_scnlen[4];			/* section length */
184		char x_nreloc[2];	/* # relocation entries */
185		char x_nlinno[2];	/* # line numbers */
186	} x_scn;
187
188        struct {
189		char x_tvfill[4];	/* tv fill value */
190		char x_tvlen[2];	/* length of .tv */
191		char x_tvran[2][2];	/* tv range */
192	} x_tv;		/* info about .tv section (in auxent of symbol .tv)) */
193
194	struct {
195		unsigned char x_scnlen[4];
196		unsigned char x_parmhash[4];
197		unsigned char x_snhash[2];
198		unsigned char x_smtyp[1];
199		unsigned char x_smclas[1];
200		unsigned char x_stab[4];
201		unsigned char x_snstab[2];
202	} x_csect;
203
204};
205
206#define	SYMENT	struct external_syment
207#define	SYMESZ	18
208#define	AUXENT	union external_auxent
209#define	AUXESZ	18
210#define DBXMASK 0x80		/* for dbx storage mask */
211#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
212
213
214
215/********************** RELOCATION DIRECTIVES **********************/
216
217
218struct external_reloc {
219  char r_vaddr[4];
220  char r_symndx[4];
221  char r_size[1];
222  char r_type[1];
223};
224
225
226#define RELOC struct external_reloc
227#define RELSZ 10
228
229#define DEFAULT_DATA_SECTION_ALIGNMENT 4
230#define DEFAULT_BSS_SECTION_ALIGNMENT 4
231#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
232/* For new sections we havn't heard of before */
233#define DEFAULT_SECTION_ALIGNMENT 4
234
235/* The ldhdr structure.  This appears at the start of the .loader
236   section.  */
237
238struct external_ldhdr
239{
240  bfd_byte l_version[4];
241  bfd_byte l_nsyms[4];
242  bfd_byte l_nreloc[4];
243  bfd_byte l_istlen[4];
244  bfd_byte l_nimpid[4];
245  bfd_byte l_impoff[4];
246  bfd_byte l_stlen[4];
247  bfd_byte l_stoff[4];
248};
249
250#define LDHDRSZ (8 * 4)
251
252struct external_ldsym
253{
254  union
255    {
256      bfd_byte _l_name[E_SYMNMLEN];
257      struct
258	{
259	  bfd_byte _l_zeroes[4];
260	  bfd_byte _l_offset[4];
261	} _l_l;
262    } _l;
263  bfd_byte l_value[4];
264  bfd_byte l_scnum[2];
265  bfd_byte l_smtype[1];
266  bfd_byte l_smclas[1];
267  bfd_byte l_ifile[4];
268  bfd_byte l_parm[4];
269};
270
271#define LDSYMSZ (8 + 3 * 4 + 2 + 2)
272
273struct external_ldrel
274{
275  bfd_byte l_vaddr[4];
276  bfd_byte l_symndx[4];
277  bfd_byte l_rtype[2];
278  bfd_byte l_rsecnm[2];
279};
280
281#define LDRELSZ (2 * 4 + 2 * 2)
282
283struct external_exceptab
284{
285  union {
286    bfd_byte e_symndx[4];
287    bfd_byte e_paddr[4];
288  } e_addr;
289  bfd_byte e_lang[1];
290  bfd_byte e_reason[1];
291};
292
293#define EXCEPTSZ (4 + 2)
294
295/******************** Core files *************************/
296
297struct external_core_dumpx
298{
299  unsigned char c_signo[1];
300  unsigned char c_flag[1];
301  unsigned char c_entries[2];
302
303  unsigned char c_version[4];
304
305  unsigned char c_fdsinfox[8];
306  unsigned char c_loader[8];
307  unsigned char c_lsize[8];
308
309  unsigned char c_n_thr[4];
310  unsigned char c_reserved0[4];
311  unsigned char c_thr[8];
312
313  unsigned char c_segs[8];
314  unsigned char c_segregion[8];
315
316  unsigned char c_stack[8];
317  unsigned char c_stackorg[8];
318  unsigned char c_size[8];
319
320  unsigned char c_data[8];
321  unsigned char c_dataorg[8];
322  unsigned char c_datasize[8];
323  unsigned char c_sdorg[8];
324  unsigned char c_sdsize[8];
325
326  unsigned char c_vmmregions[8];
327  unsigned char c_vmm[8];
328
329  unsigned char c_impl[4];
330  unsigned char c_pad[4];
331  unsigned char c_cprs[8];
332  unsigned char c_reserved[7 * 8];
333
334  /* Followed by:
335     - context of the faulting thread.
336     - user structure.  */
337};
338
339
340/* Core file verion.  */
341#define CORE_DUMPX_VERSION 0x0feeddb1
342#define CORE_DUMPXX_VERSION 0x0feeddb2
343
344struct external_ld_info32
345{
346  unsigned char ldinfo_next[4];
347  unsigned char core_offset[4];
348  unsigned char ldinfo_textorg[4];
349  unsigned char ldinfo_textsize[4];
350  unsigned char ldinfo_dataorg[4];
351  unsigned char ldinfo_datasize[4];
352  unsigned char ldinfo_filename[2];
353};
354