1/* IBM RS/6000 "XCOFF64" file definitions for BFD.
2   Copyright (C) 2000, 2001, 2002, 2010 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 3 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,
17   MA 02110-1301, USA.  */
18
19/********************** FILE HEADER **********************/
20
21struct external_filehdr
22{
23  char f_magic[2];	/* magic number			*/
24  char f_nscns[2];	/* number of sections		*/
25  char f_timdat[4];	/* time & date stamp		*/
26  char f_symptr[8];	/* file pointer to symtab 	*/
27  char f_opthdr[2];	/* sizeof(optional hdr)		*/
28  char f_flags[2];	/* flags			*/
29  char f_nsyms[4];	/* number of symtab entries	*/
30};
31
32/* IBM RS/6000.  */
33#define U803XTOCMAGIC 0757	/* Aix 4.3 64-bit XCOFF */
34#define	U64_TOCMAGIC  0767	/* AIX 5+ 64-bit XCOFF */
35#define BADMAG(x) ((x).f_magic != U803XTOCMAGIC && (x).f_magic != U64_TOCMAGIC)
36
37#define	FILHDR	struct external_filehdr
38#define	FILHSZ	24
39
40/********************** AOUT "OPTIONAL HEADER" **********************/
41
42typedef struct
43{
44  unsigned char	magic[2];		/* type of file			*/
45  unsigned char	vstamp[2];		/* version stamp		*/
46  unsigned char	o_debugger[4];		/* reserved 			*/
47  unsigned char	text_start[8];		/* base of text used for this file */
48  unsigned char	data_start[8];		/* base of data used for this file */
49  unsigned char	o_toc[8];		/* address of TOC */
50  unsigned char	o_snentry[2];		/* section number of entry point */
51  unsigned char	o_sntext[2];		/* section number of .text section */
52  unsigned char	o_sndata[2];		/* section number of .data section */
53  unsigned char	o_sntoc[2];		/* section number of TOC */
54  unsigned char	o_snloader[2];		/* section number of .loader section */
55  unsigned char	o_snbss[2];		/* section number of .bss section */
56  unsigned char	o_algntext[2];		/* .text alignment */
57  unsigned char	o_algndata[2];		/* .data alignment */
58  unsigned char	o_modtype[2];		/* module type (??) */
59  unsigned char o_cputype[2];		/* cpu type */
60  unsigned char	o_resv2[4];		/* reserved 			*/
61  unsigned char	tsize[8];		/* text size bytes, padded to FW bdry */
62  unsigned char	dsize[8];		/* initialized data "  "	*/
63  unsigned char	bsize[8];		/* uninitialized data "   "	*/
64  unsigned char	entry[8];		/* entry pt.			*/
65  unsigned char	o_maxstack[8];		/* max stack size (??) 		*/
66  unsigned char o_maxdata[8];		/* max data size (??) 		*/
67  unsigned char	o_resv3[16];		/* reserved 			*/
68}
69AOUTHDR;
70
71#define AOUTSZ 120
72#define SMALL_AOUTSZ (0)
73#define AOUTHDRSZ 72
74
75/********************** SECTION HEADER **********************/
76
77struct external_scnhdr
78{
79  char	s_name[8];	/* section name			*/
80  char	s_paddr[8];	/* physical address, aliased s_nlib */
81  char	s_vaddr[8];	/* virtual address		*/
82  char	s_size[8];	/* section size			*/
83  char	s_scnptr[8];	/* file ptr to raw data for section */
84  char	s_relptr[8];	/* file ptr to relocation	*/
85  char	s_lnnoptr[8];	/* file ptr to line numbers	*/
86  char	s_nreloc[4];	/* number of relocation entries	*/
87  char	s_nlnno[4];	/* number of line number entries*/
88  char	s_flags[4];	/* flags			*/
89  char  s_pad[4];	/* padding */
90};
91
92#define	SCNHDR	struct external_scnhdr
93
94#define	SCNHSZ	72
95
96/********************** LINE NUMBERS **********************/
97
98/* 1 line number entry for every "breakpointable" source line in a section.
99   Line numbers are grouped on a per function basis; first entry in a function
100   grouping will have l_lnno = 0 and in place of physical address will be the
101   symbol table index of the function name.  */
102
103struct external_lineno
104{
105  union
106  {
107    char l_symndx[4];	/* function name symbol index, iff l_lnno == 0*/
108    char l_paddr[8];	/* (physical) address of line number	*/
109  } l_addr;
110
111  char l_lnno[4];	/* line number		*/
112};
113
114#define	LINENO	struct external_lineno
115
116#define	LINESZ	12
117
118/********************** SYMBOLS **********************/
119
120#define E_SYMNMLEN	8	/* # characters in a symbol name	*/
121#define E_FILNMLEN	14	/* # characters in a file name		*/
122#define E_DIMNUM	4	/* # array dimensions in auxiliary entry */
123
124struct external_syment
125{
126  char e_value[8];
127  char e_offset[4];
128  char e_scnum[2];
129  char e_type[2];
130  char e_sclass[1];
131  char e_numaux[1];
132};
133
134#define N_BTMASK	(017)
135#define N_TMASK		(060)
136#define N_BTSHFT	(4)
137#define N_TSHIFT	(2)
138
139union external_auxent
140{
141    struct {
142    	union {
143	    struct {
144		char x_lnno[4]; 	/* declaration line number */
145		char x_size[2]; 	/* str/union/array size */
146	    } x_lnsz;
147	    struct {
148		char x_lnnoptr[8];/* ptr to fcn line */
149		char x_fsize[4];	 /* size of function */
150		char x_endndx[4];	 /* entry ndx past block end */
151	    } x_fcn;
152 	} x_fcnary;
153    } x_sym;
154
155    union {
156	char x_fname[E_FILNMLEN];
157	struct {
158	    char x_zeroes[4];
159	    char x_offset[4];
160	    char          x_pad[6];
161	    unsigned char x_ftype[1];
162	    unsigned char x_resv[2];
163	} x_n;
164    } x_file;
165
166    struct {
167	char x_exptr[8];
168	char x_fsize[4];
169	char x_endndx[4];
170	char x_pad[1];
171    } x_except;
172
173    struct {
174	    unsigned char x_scnlen_lo[4];
175	    unsigned char x_parmhash[4];
176	    unsigned char x_snhash[2];
177	    unsigned char x_smtyp[1];
178	    unsigned char x_smclas[1];
179	    unsigned char x_scnlen_hi[4];
180	    unsigned char x_pad[1];
181    } x_csect;
182
183    struct {
184	char x_pad[17];
185	char x_auxtype[1];
186    } x_auxtype;
187};
188
189#define	SYMENT	struct external_syment
190#define	SYMESZ	18
191#define	AUXENT	union external_auxent
192#define	AUXESZ	18
193#define DBXMASK 0x80		/* for dbx storage mask */
194#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
195
196/* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h.  */
197#define _AUX_EXCEPT     255
198#define _AUX_FCN        254
199#define _AUX_SYM        253
200#define _AUX_FILE       252
201#define _AUX_CSECT      251
202
203/********************** RELOCATION DIRECTIVES **********************/
204
205struct external_reloc
206{
207  char r_vaddr[8];
208  char r_symndx[4];
209  char r_size[1];
210  char r_type[1];
211};
212
213#define RELOC struct external_reloc
214#define RELSZ 14
215
216#define DEFAULT_DATA_SECTION_ALIGNMENT 4
217#define DEFAULT_BSS_SECTION_ALIGNMENT 4
218#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
219/* For new sections we havn't heard of before */
220#define DEFAULT_SECTION_ALIGNMENT 4
221
222/* The ldhdr structure.  This appears at the start of the .loader
223   section.  */
224
225struct external_ldhdr
226{
227  bfd_byte l_version[4];
228  bfd_byte l_nsyms[4];
229  bfd_byte l_nreloc[4];
230  bfd_byte l_istlen[4];
231  bfd_byte l_nimpid[4];
232  bfd_byte l_stlen[4];
233  bfd_byte l_impoff[8];
234  bfd_byte l_stoff[8];
235  bfd_byte l_symoff[8];
236  bfd_byte l_rldoff[8];
237};
238#define LDHDRSZ (56)
239
240struct external_ldsym
241{
242  bfd_byte l_value[8];
243  bfd_byte l_offset[4];
244  bfd_byte l_scnum[2];
245  bfd_byte l_smtype[1];
246  bfd_byte l_smclas[1];
247  bfd_byte l_ifile[4];
248  bfd_byte l_parm[4];
249};
250
251#define LDSYMSZ (24)
252
253struct external_ldrel
254{
255  bfd_byte l_vaddr[8];
256  bfd_byte l_rtype[2];
257  bfd_byte l_rsecnm[2];
258  bfd_byte l_symndx[4];
259};
260
261#define LDRELSZ (16)
262