1 /* IBM RS/6000 "XCOFF64" file definitions for BFD.
2 Copyright (C) 2000-2022 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 3 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,
17 MA 02110-1301, USA. */
19 /********************** FILE HEADER **********************/
21 struct external_filehdr
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 */
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)
37 #define FILHDR struct external_filehdr
40 /********************** AOUT "OPTIONAL HEADER" **********************/
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_textpsize
[1]; /* text page size */
61 unsigned char o_datapsize
[1]; /* data page size */
62 unsigned char o_stackpsize
[1]; /* stack page size */
63 unsigned char o_flags
[1]; /* Flags and TLS alignment */
64 unsigned char tsize
[8]; /* text size bytes, padded to FW bdry */
65 unsigned char dsize
[8]; /* initialized data " " */
66 unsigned char bsize
[8]; /* uninitialized data " " */
67 unsigned char entry
[8]; /* entry pt. */
68 unsigned char o_maxstack
[8]; /* max stack size (??) */
69 unsigned char o_maxdata
[8]; /* max data size (??) */
70 unsigned char o_sntdata
[2]; /* section number of .tdata section */
71 unsigned char o_sntbss
[2]; /* section number of .tbss section */
72 unsigned char o_x64flags
[2]; /* XCOFF64 flags */
73 unsigned char o_resv3
[10]; /* reserved */
78 #define SMALL_AOUTSZ (0)
81 /********************** SECTION HEADER **********************/
83 struct external_scnhdr
85 char s_name
[8]; /* section name */
86 char s_paddr
[8]; /* physical address, aliased s_nlib */
87 char s_vaddr
[8]; /* virtual address */
88 char s_size
[8]; /* section size */
89 char s_scnptr
[8]; /* file ptr to raw data for section */
90 char s_relptr
[8]; /* file ptr to relocation */
91 char s_lnnoptr
[8]; /* file ptr to line numbers */
92 char s_nreloc
[4]; /* number of relocation entries */
93 char s_nlnno
[4]; /* number of line number entries*/
94 char s_flags
[4]; /* flags */
95 char s_pad
[4]; /* padding */
98 #define SCNHDR struct external_scnhdr
102 /********************** LINE NUMBERS **********************/
104 /* 1 line number entry for every "breakpointable" source line in a section.
105 Line numbers are grouped on a per function basis; first entry in a function
106 grouping will have l_lnno = 0 and in place of physical address will be the
107 symbol table index of the function name. */
109 struct external_lineno
113 char l_symndx
[4]; /* function name symbol index, iff l_lnno == 0*/
114 char l_paddr
[8]; /* (physical) address of line number */
117 char l_lnno
[4]; /* line number */
120 #define LINENO struct external_lineno
124 /********************** SYMBOLS **********************/
126 #define E_SYMNMLEN 8 /* # characters in a symbol name */
127 #define E_FILNMLEN 14 /* # characters in a file name */
128 #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */
130 struct external_syment
140 #define N_BTMASK (017)
141 #define N_TMASK (060)
145 union external_auxent
148 char x_lnno
[4]; /* declaration line number */
154 char x_lnnoptr
[8];/* ptr to fcn line */
155 char x_fsize
[4]; /* size of function */
156 char x_endndx
[4]; /* entry ndx past block end */
163 char x_fname
[E_FILNMLEN
];
170 unsigned char x_ftype
[1];
171 unsigned char x_resv
[2];
202 #define SYMENT struct external_syment
204 #define AUXENT union external_auxent
206 #define DBXMASK 0x80 /* for dbx storage mask */
207 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
209 /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h. */
210 #define _AUX_EXCEPT 255
213 #define _AUX_FILE 252
214 #define _AUX_CSECT 251
215 #define _AUX_SECT 250
217 /********************** RELOCATION DIRECTIVES **********************/
219 struct external_reloc
227 #define RELOC struct external_reloc
230 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
231 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
232 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
233 /* For new sections we havn't heard of before */
234 #define DEFAULT_SECTION_ALIGNMENT 4
236 /* The ldhdr structure. This appears at the start of the .loader
239 struct external_ldhdr
241 bfd_byte l_version
[4];
243 bfd_byte l_nreloc
[4];
244 bfd_byte l_istlen
[4];
245 bfd_byte l_nimpid
[4];
247 bfd_byte l_impoff
[8];
249 bfd_byte l_symoff
[8];
250 bfd_byte l_rldoff
[8];
254 struct external_ldsym
257 bfd_byte l_offset
[4];
259 bfd_byte l_smtype
[1];
260 bfd_byte l_smclas
[1];
267 struct external_ldrel
271 bfd_byte l_rsecnm
[2];
272 bfd_byte l_symndx
[4];
277 struct external_exceptab
280 bfd_byte e_symndx
[4];
284 bfd_byte e_reason
[1];
287 #define EXCEPTSZ (10)