rs6k64.h revision 89857 
1/* IBM RS/6000 "XCOFF64" file definitions for BFD.
2   Copyright (C) 2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17*/
18
19/********************** FILE HEADER **********************/
20
21struct external_filehdr {
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	/* readonly text segments and TOC, XCOFF64 */
33
34#define BADMAG(x) ((x).f_magic != U803XTOCMAGIC)
35
36#define	FILHDR	struct external_filehdr
37#define	FILHSZ	24
38
39/********************** AOUT "OPTIONAL HEADER" **********************/
40
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
77
78struct external_scnhdr {
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
93#define	SCNHDR	struct external_scnhdr
94
95#define	SCNHSZ	72
96
97/********************** LINE NUMBERS **********************/
98
99/* 1 line number entry for every "breakpointable" source line in a section.
100 * Line numbers are grouped on a per function basis; first entry in a function
101 * grouping will have l_lnno = 0 and in place of physical address will be the
102 * symbol table index of the function name.
103 */
104struct external_lineno {
105	union {
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	char l_lnno[4];		/* line number		*/
110};
111
112
113#define	LINENO	struct external_lineno
114
115#define	LINESZ	12
116
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
135
136#define N_BTMASK	(017)
137#define N_TMASK		(060)
138#define N_BTSHFT	(4)
139#define N_TSHIFT	(2)
140
141
142union external_auxent {
143
144    struct {
145    	union {
146	    struct {
147		char x_lnno[4]; 	/* declaration line number */
148		char x_size[2]; 	/* str/union/array size */
149	    } x_lnsz;
150	    struct {
151		char x_lnnoptr[8];/* ptr to fcn line */
152		char x_fsize[4];	 /* size of function */
153		char x_endndx[4];	 /* entry ndx past block end */
154	    } x_fcn;
155 	} x_fcnary;
156    } x_sym;
157
158    union {
159	char x_fname[E_FILNMLEN];
160	struct {
161	    char x_zeroes[4];
162	    char x_offset[4];
163	    char          x_pad[6];
164	    unsigned char x_ftype[1];
165	    unsigned char x_resv[2];
166	} x_n;
167    } x_file;
168
169    struct {
170	char x_exptr[8];
171	char x_fsize[4];
172	char x_endndx[4];
173	char x_pad[1];
174    } x_except;
175
176    struct {
177	    unsigned char x_scnlen_lo[4];
178	    unsigned char x_parmhash[4];
179	    unsigned char x_snhash[2];
180	    unsigned char x_smtyp[1];
181	    unsigned char x_smclas[1];
182	    unsigned char x_scnlen_hi[4];
183	    unsigned char x_pad[1];
184    } x_csect;
185
186    struct {
187	char x_pad[17];
188	char x_auxtype[1];
189    } x_auxtype;
190};
191
192#define	SYMENT	struct external_syment
193#define	SYMESZ	18
194#define	AUXENT	union external_auxent
195#define	AUXESZ	18
196#define DBXMASK 0x80		/* for dbx storage mask */
197#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
198
199/* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h */
200#define _AUX_EXCEPT     255
201#define _AUX_FCN        254
202#define _AUX_SYM        253
203#define _AUX_FILE       252
204#define _AUX_CSECT      251
205
206
207
208/********************** RELOCATION DIRECTIVES **********************/
209
210
211struct external_reloc {
212  char r_vaddr[8];
213  char r_symndx[4];
214  char r_size[1];
215  char r_type[1];
216};
217
218
219#define RELOC struct external_reloc
220#define RELSZ 14
221
222#define DEFAULT_DATA_SECTION_ALIGNMENT 4
223#define DEFAULT_BSS_SECTION_ALIGNMENT 4
224#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
225/* For new sections we havn't heard of before */
226#define DEFAULT_SECTION_ALIGNMENT 4
227
228/* The ldhdr structure.  This appears at the start of the .loader
229   section.  */
230
231struct external_ldhdr
232{
233  bfd_byte l_version[4];
234  bfd_byte l_nsyms[4];
235  bfd_byte l_nreloc[4];
236  bfd_byte l_istlen[4];
237  bfd_byte l_nimpid[4];
238  bfd_byte l_stlen[4];
239  bfd_byte l_impoff[8];
240  bfd_byte l_stoff[8];
241  bfd_byte l_symoff[8];
242  bfd_byte l_rldoff[8];
243};
244#define LDHDRSZ (56)
245
246struct external_ldsym
247{
248  bfd_byte l_value[8];
249  bfd_byte l_offset[4];
250  bfd_byte l_scnum[2];
251  bfd_byte l_smtype[1];
252  bfd_byte l_smclas[1];
253  bfd_byte l_ifile[4];
254  bfd_byte l_parm[4];
255};
256
257#define LDSYMSZ (24)
258
259struct external_ldrel
260{
261  bfd_byte l_vaddr[8];
262  bfd_byte l_rtype[2];
263  bfd_byte l_rsecnm[2];
264  bfd_byte l_symndx[4];
265};
266
267#define LDRELSZ (16)
268