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5191 serge 1
/* IBM RS/6000 "XCOFF64" file definitions for BFD.
6324 serge 2
   Copyright (C) 2000-2015 Free Software Foundation, Inc.
5191 serge 3
 
4
   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
8
 
9
   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
13
 
14
   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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19
/********************** FILE HEADER **********************/
20
 
21
struct external_filehdr
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{
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  char f_magic[2];	/* magic number			*/
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  char f_nscns[2];	/* number of sections		*/
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  char f_timdat[4];	/* time & date stamp		*/
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  char f_symptr[8];	/* file pointer to symtab 	*/
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  char f_opthdr[2];	/* sizeof(optional hdr)		*/
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  char f_flags[2];	/* flags			*/
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  char f_nsyms[4];	/* number of symtab entries	*/
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};
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32
/* IBM RS/6000.  */
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#define U803XTOCMAGIC 0757	/* Aix 4.3 64-bit XCOFF */
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#define	U64_TOCMAGIC  0767	/* AIX 5+ 64-bit XCOFF */
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#define BADMAG(x) ((x).f_magic != U803XTOCMAGIC && (x).f_magic != U64_TOCMAGIC)
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37
#define	FILHDR	struct external_filehdr
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#define	FILHSZ	24
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40
/********************** AOUT "OPTIONAL HEADER" **********************/
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42
typedef struct
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{
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  unsigned char	magic[2];		/* type of file			*/
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  unsigned char	vstamp[2];		/* version stamp		*/
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  unsigned char	o_debugger[4];		/* reserved 			*/
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  unsigned char	text_start[8];		/* base of text used for this file */
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  unsigned char	data_start[8];		/* base of data used for this file */
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  unsigned char	o_toc[8];		/* address of TOC */
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  unsigned char	o_snentry[2];		/* section number of entry point */
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  unsigned char	o_sntext[2];		/* section number of .text section */
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  unsigned char	o_sndata[2];		/* section number of .data section */
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  unsigned char	o_sntoc[2];		/* section number of TOC */
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  unsigned char	o_snloader[2];		/* section number of .loader section */
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  unsigned char	o_snbss[2];		/* section number of .bss section */
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  unsigned char	o_algntext[2];		/* .text alignment */
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  unsigned char	o_algndata[2];		/* .data alignment */
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  unsigned char	o_modtype[2];		/* module type (??) */
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  unsigned char o_cputype[2];		/* cpu type */
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  unsigned char	o_resv2[4];		/* reserved 			*/
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  unsigned char	tsize[8];		/* text size bytes, padded to FW bdry */
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  unsigned char	dsize[8];		/* initialized data "  "	*/
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  unsigned char	bsize[8];		/* uninitialized data "   "	*/
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  unsigned char	entry[8];		/* entry pt.			*/
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  unsigned char	o_maxstack[8];		/* max stack size (??) 		*/
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  unsigned char o_maxdata[8];		/* max data size (??) 		*/
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  unsigned char	o_resv3[16];		/* reserved 			*/
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}
69
AOUTHDR;
70
 
71
#define AOUTSZ 120
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#define SMALL_AOUTSZ (0)
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#define AOUTHDRSZ 72
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75
/********************** SECTION HEADER **********************/
76
 
77
struct external_scnhdr
78
{
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  char	s_name[8];	/* section name			*/
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  char	s_paddr[8];	/* physical address, aliased s_nlib */
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  char	s_vaddr[8];	/* virtual address		*/
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  char	s_size[8];	/* section size			*/
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  char	s_scnptr[8];	/* file ptr to raw data for section */
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  char	s_relptr[8];	/* file ptr to relocation	*/
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  char	s_lnnoptr[8];	/* file ptr to line numbers	*/
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  char	s_nreloc[4];	/* number of relocation entries	*/
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  char	s_nlnno[4];	/* number of line number entries*/
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  char	s_flags[4];	/* flags			*/
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  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
 
103
struct 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
 
124
struct 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
 
139
union 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 */
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		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
    struct {
156
        union {
157
            char x_fname[E_FILNMLEN];
158
            struct {
159
	        char x_zeroes[4];
160
                char x_offset[4];
161
	        char x_pad[6];
162
            } x_n;
163
        } x_n;
164
        unsigned char x_ftype[1];
165
        unsigned char x_resv[2];
166
    } x_file;
167
 
168
    struct {
169
	char x_exptr[8];
170
	char x_fsize[4];
171
	char x_endndx[4];
172
	char x_pad[1];
173
    } x_except;
174
 
175
    struct {
176
	    unsigned char x_scnlen_lo[4];
177
	    unsigned char x_parmhash[4];
178
	    unsigned char x_snhash[2];
179
	    unsigned char x_smtyp[1];
180
	    unsigned char x_smclas[1];
181
	    unsigned char x_scnlen_hi[4];
182
	    unsigned char x_pad[1];
183
    } x_csect;
184
 
185
    struct {
186
	char x_pad[17];
187
	char x_auxtype[1];
188
    } x_auxtype;
189
};
190
 
191
#define	SYMENT	struct external_syment
192
#define	SYMESZ	18
193
#define	AUXENT	union external_auxent
194
#define	AUXESZ	18
195
#define DBXMASK 0x80		/* for dbx storage mask */
196
#define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
197
 
198
/* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h.  */
199
#define _AUX_EXCEPT     255
200
#define _AUX_FCN        254
201
#define _AUX_SYM        253
202
#define _AUX_FILE       252
203
#define _AUX_CSECT      251
204
 
205
/********************** RELOCATION DIRECTIVES **********************/
206
 
207
struct external_reloc
208
{
209
  char r_vaddr[8];
210
  char r_symndx[4];
211
  char r_size[1];
212
  char r_type[1];
213
};
214
 
215
#define RELOC struct external_reloc
216
#define RELSZ 14
217
 
218
#define DEFAULT_DATA_SECTION_ALIGNMENT 4
219
#define DEFAULT_BSS_SECTION_ALIGNMENT 4
220
#define DEFAULT_TEXT_SECTION_ALIGNMENT 4
221
/* For new sections we havn't heard of before */
222
#define DEFAULT_SECTION_ALIGNMENT 4
223
 
224
/* The ldhdr structure.  This appears at the start of the .loader
225
   section.  */
226
 
227
struct external_ldhdr
228
{
229
  bfd_byte l_version[4];
230
  bfd_byte l_nsyms[4];
231
  bfd_byte l_nreloc[4];
232
  bfd_byte l_istlen[4];
233
  bfd_byte l_nimpid[4];
234
  bfd_byte l_stlen[4];
235
  bfd_byte l_impoff[8];
236
  bfd_byte l_stoff[8];
237
  bfd_byte l_symoff[8];
238
  bfd_byte l_rldoff[8];
239
};
240
#define LDHDRSZ (56)
241
 
242
struct external_ldsym
243
{
244
  bfd_byte l_value[8];
245
  bfd_byte l_offset[4];
246
  bfd_byte l_scnum[2];
247
  bfd_byte l_smtype[1];
248
  bfd_byte l_smclas[1];
249
  bfd_byte l_ifile[4];
250
  bfd_byte l_parm[4];
251
};
252
 
253
#define LDSYMSZ (24)
254
 
255
struct external_ldrel
256
{
257
  bfd_byte l_vaddr[8];
258
  bfd_byte l_rtype[2];
259
  bfd_byte l_rsecnm[2];
260
  bfd_byte l_symndx[4];
261
};
262
 
263
#define LDRELSZ (16)
264
 
265
struct external_exceptab
266
{
267
  union {
268
    bfd_byte e_symndx[4];
269
    bfd_byte e_paddr[8];
270
  } e_addr;
271
  bfd_byte e_lang[1];
272
  bfd_byte e_reason[1];
273
};
274
 
275
#define EXCEPTSZ (10)