1 /* IBM RS/6000 "XCOFF64" file definitions for BFD.
2 Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
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.
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.
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. */
18 /********************** FILE HEADER **********************/
20 struct 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 */
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)
36 #define FILHDR struct external_filehdr
39 /********************** AOUT "OPTIONAL HEADER" **********************/
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 */
71 #define SMALL_AOUTSZ (0)
74 /********************** SECTION HEADER **********************/
76 struct external_scnhdr
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 */
91 #define SCNHDR struct external_scnhdr
95 /********************** LINE NUMBERS **********************/
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. */
102 struct external_lineno
106 char l_symndx
[4]; /* function name symbol index, iff l_lnno == 0*/
107 char l_paddr
[8]; /* (physical) address of line number */
110 char l_lnno
[4]; /* line number */
113 #define LINENO struct external_lineno
117 /********************** SYMBOLS **********************/
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 */
123 struct external_syment
133 #define N_BTMASK (017)
134 #define N_TMASK (060)
138 union external_auxent
143 char x_lnno
[4]; /* declaration line number */
144 char x_size
[2]; /* str/union/array size */
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 */
155 char x_fname
[E_FILNMLEN
];
160 unsigned char x_ftype
[1];
161 unsigned char x_resv
[2];
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];
188 #define SYMENT struct external_syment
190 #define AUXENT union external_auxent
192 #define DBXMASK 0x80 /* for dbx storage mask */
193 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
195 /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h. */
196 #define _AUX_EXCEPT 255
199 #define _AUX_FILE 252
200 #define _AUX_CSECT 251
202 /********************** RELOCATION DIRECTIVES **********************/
204 struct external_reloc
212 #define RELOC struct external_reloc
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
221 /* The ldhdr structure. This appears at the start of the .loader
224 struct external_ldhdr
226 bfd_byte l_version
[4];
228 bfd_byte l_nreloc
[4];
229 bfd_byte l_istlen
[4];
230 bfd_byte l_nimpid
[4];
232 bfd_byte l_impoff
[8];
234 bfd_byte l_symoff
[8];
235 bfd_byte l_rldoff
[8];
239 struct external_ldsym
242 bfd_byte l_offset
[4];
244 bfd_byte l_smtype
[1];
245 bfd_byte l_smclas
[1];
252 struct external_ldrel
256 bfd_byte l_rsecnm
[2];
257 bfd_byte l_symndx
[4];
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