1/* IBM RS/6000 "XCOFF64" file definitions for BFD.
2   Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2 of the License, or
7   (at your option) any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software
16   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
17
18/********************** FILE HEADER **********************/
19
20struct external_filehdr
21{
22  char f_magic[2];	/* magic number			*/
23  char f_nscns[2];	/* number of sections		*/
24  char f_timdat[4];	/* time & date stamp		*/
25  char f_symptr[8];	/* file pointer to symtab 	*/
26  char f_opthdr[2];	/* sizeof(optional hdr)		*/
27  char f_flags[2];	/* flags			*/
28  char f_nsyms[4];	/* number of symtab entries	*/
29};
30
31/* IBM RS/6000.  */
32#define U803XTOCMAGIC 0757	/* Aix 4.3 64-bit XCOFF */
33#define	U64_TOCMAGIC  0767	/* AIX 5+ 64-bit XCOFF */
34#define BADMAG(x) ((x).f_magic != U803XTOCMAGIC && (x).f_magic != U64_TOCMAGIC)
35
36#define	FILHDR	struct external_filehdr
37#define	FILHSZ	24
38
39/********************** AOUT "OPTIONAL HEADER" **********************/
40
41typedef struct
42{
43  unsigned char	magic[2];		/* type of file			*/
44  unsigned char	vstamp[2];		/* version stamp		*/
45  unsigned char	o_debugger[4];		/* reserved 			*/
46  unsigned char	text_start[8];		/* base of text used for this file */
47  unsigned char	data_start[8];		/* base of data used for this file */
48  unsigned char	o_toc[8];		/* address of TOC */
49  unsigned char	o_snentry[2];		/* section number of entry point */
50  unsigned char	o_sntext[2];		/* section number of .text section */
51  unsigned char	o_sndata[2];		/* section number of .data section */
52  unsigned char	o_sntoc[2];		/* section number of TOC */
53  unsigned char	o_snloader[2];		/* section number of .loader section */
54  unsigned char	o_snbss[2];		/* section number of .bss section */
55  unsigned char	o_algntext[2];		/* .text alignment */
56  unsigned char	o_algndata[2];		/* .data alignment */
57  unsigned char	o_modtype[2];		/* module type (??) */
58  unsigned char o_cputype[2];		/* cpu type */
59  unsigned char	o_resv2[4];		/* reserved 			*/
60  unsigned char	tsize[8];		/* text size bytes, padded to FW bdry */
61  unsigned char	dsize[8];		/* initialized data "  "	*/
62  unsigned char	bsize[8];		/* uninitialized data "   "	*/
63  unsigned char	entry[8];		/* entry pt.			*/
64  unsigned char	o_maxstack[8];		/* max stack size (??) 		*/
65  unsigned char o_maxdata[8];		/* max data size (??) 		*/
66  unsigned char	o_resv3[16];		/* reserved 			*/
67}
68AOUTHDR;
69
70#define AOUTSZ 120
71#define SMALL_AOUTSZ (0)
72#define AOUTHDRSZ 72
73
74/********************** SECTION HEADER **********************/
75
76struct external_scnhdr
77{
78  char	s_name[8];	/* section name			*/
79  char	s_paddr[8];	/* physical address, aliased s_nlib */
80  char	s_vaddr[8];	/* virtual address		*/
81  char	s_size[8];	/* section size			*/
82  char	s_scnptr[8];	/* file ptr to raw data for section */
83  char	s_relptr[8];	/* file ptr to relocation	*/
84  char	s_lnnoptr[8];	/* file ptr to line numbers	*/
85  char	s_nreloc[4];	/* number of relocation entries	*/
86  char	s_nlnno[4];	/* number of line number entries*/
87  char	s_flags[4];	/* flags			*/
88  char  s_pad[4];	/* padding */
89};
90
91#define	SCNHDR	struct external_scnhdr
92
93#define	SCNHSZ	72
94
95/********************** LINE NUMBERS **********************/
96
97/* 1 line number entry for every "breakpointable" source line in a section.
98   Line numbers are grouped on a per function basis; first entry in a function
99   grouping will have l_lnno = 0 and in place of physical address will be the
100   symbol table index of the function name.  */
101
102struct external_lineno
103{
104  union
105  {
106    char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
107    char l_paddr[8];	/* (physical) address of line number	*/
108  } l_addr;
109
110  char l_lnno[4];	/* line number		*/
111};
112
113#define	LINENO	struct external_lineno
114
115#define	LINESZ	12
116
117/********************** SYMBOLS **********************/
118
119#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
120#define E_FILNMLEN	14	/* # characters in a file name		*/
121#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
122
123struct external_syment
124{
125  char e_value[8];
126  char e_offset[4];
127  char e_scnum[2];
128  char e_type[2];
129  char e_sclass[1];
130  char e_numaux[1];
131};
132
133#define N_BTMASK	(017)
134#define N_TMASK		(060)
135#define N_BTSHFT	(4)
136#define N_TSHIFT	(2)
137
138union external_auxent
139{
140    struct {
141    	union {
142	    struct {
143		char x_lnno[4]; 	/* declaration line number */
144		char x_size[2]; 	/* str/union/array size */
145	    } x_lnsz;
146	    struct {
147		char x_lnnoptr[8];/* ptr to fcn line */
148		char x_fsize[4];	 /* size of function */
149		char x_endndx[4];	 /* entry ndx past block end */
150	    } x_fcn;
151 	} x_fcnary;
152    } x_sym;
153
154    union {
155	char x_fname[E_FILNMLEN];
156	struct {
157	    char x_zeroes[4];
158	    char x_offset[4];
159	    char          x_pad[6];
160	    unsigned char x_ftype[1];
161	    unsigned char x_resv[2];
162	} x_n;
163    } x_file;
164
165    struct {
166	char x_exptr[8];
167	char x_fsize[4];
168	char x_endndx[4];
169	char x_pad[1];
170    } x_except;
171
172    struct {
173	    unsigned char x_scnlen_lo[4];
174	    unsigned char x_parmhash[4];
175	    unsigned char x_snhash[2];
176	    unsigned char x_smtyp[1];
177	    unsigned char x_smclas[1];
178	    unsigned char x_scnlen_hi[4];
179	    unsigned char x_pad[1];
180    } x_csect;
181
182    struct {
183	char x_pad[17];
184	char x_auxtype[1];
185    } x_auxtype;
186};
187
188#define	SYMENT	struct external_syment
189#define	SYMESZ	18
190#define	AUXENT	union external_auxent
191#define	AUXESZ	18
192#define DBXMASK 0x80		/* for dbx storage mask */
193#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
194
195/* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h.  */
196#define _AUX_EXCEPT     255
197#define _AUX_FCN        254
198#define _AUX_SYM        253
199#define _AUX_FILE       252
200#define _AUX_CSECT      251
201
202/********************** RELOCATION DIRECTIVES **********************/
203
204struct external_reloc
205{
206  char r_vaddr[8];
207  char r_symndx[4];
208  char r_size[1];
209  char r_type[1];
210};
211
212#define RELOC struct external_reloc
213#define RELSZ 14
214
215#define DEFAULT_DATA_SECTION_ALIGNMENT 4
216#define DEFAULT_BSS_SECTION_ALIGNMENT 4
217#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
218/* For new sections we havn't heard of before */
219#define DEFAULT_SECTION_ALIGNMENT 4
220
221/* The ldhdr structure.  This appears at the start of the .loader
222   section.  */
223
224struct external_ldhdr
225{
226  bfd_byte l_version[4];
227  bfd_byte l_nsyms[4];
228  bfd_byte l_nreloc[4];
229  bfd_byte l_istlen[4];
230  bfd_byte l_nimpid[4];
231  bfd_byte l_stlen[4];
232  bfd_byte l_impoff[8];
233  bfd_byte l_stoff[8];
234  bfd_byte l_symoff[8];
235  bfd_byte l_rldoff[8];
236};
237#define LDHDRSZ (56)
238
239struct external_ldsym
240{
241  bfd_byte l_value[8];
242  bfd_byte l_offset[4];
243  bfd_byte l_scnum[2];
244  bfd_byte l_smtype[1];
245  bfd_byte l_smclas[1];
246  bfd_byte l_ifile[4];
247  bfd_byte l_parm[4];
248};
249
250#define LDSYMSZ (24)
251
252struct external_ldrel
253{
254  bfd_byte l_vaddr[8];
255  bfd_byte l_rtype[2];
256  bfd_byte l_rsecnm[2];
257  bfd_byte l_symndx[4];
258};
259
260#define LDRELSZ (16)
261