1 /* IBM RS/6000 "XCOFF64" file definitions for BFD.
2 Copyright (C) 2000-2015 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_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 */
72 #define SMALL_AOUTSZ (0)
75 /********************** SECTION HEADER **********************/
77 struct 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 */
92 #define SCNHDR struct external_scnhdr
96 /********************** LINE NUMBERS **********************/
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. */
103 struct external_lineno
107 char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/
108 char l_paddr[8]; /* (physical) address of line number */
111 char l_lnno[4]; /* line number */
114 #define LINENO struct external_lineno
118 /********************** SYMBOLS **********************/
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 */
124 struct external_syment
134 #define N_BTMASK (017)
135 #define N_TMASK (060)
139 union external_auxent
144 char x_lnno[4]; /* declaration line number */
145 char x_size[2]; /* str/union/array size */
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 */
157 char x_fname[E_FILNMLEN];
164 unsigned char x_ftype[1];
165 unsigned char x_resv[2];
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];
191 #define SYMENT struct external_syment
193 #define AUXENT union external_auxent
195 #define DBXMASK 0x80 /* for dbx storage mask */
196 #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK)
198 /* Values for auxtype field in XCOFF64, taken from AIX 4.3 sym.h. */
199 #define _AUX_EXCEPT 255
202 #define _AUX_FILE 252
203 #define _AUX_CSECT 251
205 /********************** RELOCATION DIRECTIVES **********************/
207 struct external_reloc
215 #define RELOC struct external_reloc
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
224 /* The ldhdr structure. This appears at the start of the .loader
227 struct external_ldhdr
229 bfd_byte l_version[4];
231 bfd_byte l_nreloc[4];
232 bfd_byte l_istlen[4];
233 bfd_byte l_nimpid[4];
235 bfd_byte l_impoff[8];
237 bfd_byte l_symoff[8];
238 bfd_byte l_rldoff[8];
242 struct external_ldsym
245 bfd_byte l_offset[4];
247 bfd_byte l_smtype[1];
248 bfd_byte l_smclas[1];
255 struct external_ldrel
259 bfd_byte l_rsecnm[2];
260 bfd_byte l_symndx[4];
265 struct external_exceptab
268 bfd_byte e_symndx[4];
272 bfd_byte e_reason[1];
275 #define EXCEPTSZ (10)