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252b5132 | 1 | /* IBM RS/6000 "XCOFF" file definitions for BFD. |
e4e42b45 | 2 | Copyright (C) 1990, 1991, 2001, 2010 Free Software Foundation, Inc. |
2ce18a16 | 3 | Written by Mimi Phuong-Thao Vo of IBM |
e4e42b45 NC |
4 | and John Gilmore of Cygnus Support. |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
3dd657b1 TR |
21 | /********************** FILE HEADER **********************/ |
22 | ||
23 | struct external_filehdr { | |
24 | char f_magic[2]; /* magic number */ | |
25 | char f_nscns[2]; /* number of sections */ | |
26 | char f_timdat[4]; /* time & date stamp */ | |
27 | char f_symptr[4]; /* file pointer to symtab */ | |
28 | char f_nsyms[4]; /* number of symtab entries */ | |
29 | char f_opthdr[2]; /* sizeof(optional hdr) */ | |
30 | char f_flags[2]; /* flags */ | |
31 | }; | |
252b5132 RH |
32 | |
33 | /* IBM RS/6000 */ | |
34 | #define U802WRMAGIC 0730 /* writeable text segments **chh** */ | |
35 | #define U802ROMAGIC 0735 /* readonly sharable text segments */ | |
36 | #define U802TOCMAGIC 0737 /* readonly text segments and TOC */ | |
37 | ||
38 | #define BADMAG(x) \ | |
39 | ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \ | |
40 | (x).f_magic != U802TOCMAGIC) | |
41 | ||
3dd657b1 TR |
42 | #define FILHDR struct external_filehdr |
43 | #define FILHSZ 20 | |
44 | ||
45 | ||
252b5132 RH |
46 | /********************** AOUT "OPTIONAL HEADER" **********************/ |
47 | ||
3dd657b1 | 48 | |
252b5132 RH |
49 | typedef struct |
50 | { | |
51 | unsigned char magic[2]; /* type of file */ | |
52 | unsigned char vstamp[2]; /* version stamp */ | |
53 | unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */ | |
54 | unsigned char dsize[4]; /* initialized data " " */ | |
55 | unsigned char bsize[4]; /* uninitialized data " " */ | |
56 | unsigned char entry[4]; /* entry pt. */ | |
57 | unsigned char text_start[4]; /* base of text used for this file */ | |
58 | unsigned char data_start[4]; /* base of data used for this file */ | |
59 | unsigned char o_toc[4]; /* address of TOC */ | |
60 | unsigned char o_snentry[2]; /* section number of entry point */ | |
61 | unsigned char o_sntext[2]; /* section number of .text section */ | |
62 | unsigned char o_sndata[2]; /* section number of .data section */ | |
63 | unsigned char o_sntoc[2]; /* section number of TOC */ | |
64 | unsigned char o_snloader[2]; /* section number of .loader section */ | |
65 | unsigned char o_snbss[2]; /* section number of .bss section */ | |
66 | unsigned char o_algntext[2]; /* .text alignment */ | |
67 | unsigned char o_algndata[2]; /* .data alignment */ | |
68 | unsigned char o_modtype[2]; /* module type (??) */ | |
69 | unsigned char o_cputype[2]; /* cpu type */ | |
70 | unsigned char o_maxstack[4]; /* max stack size (??) */ | |
71 | unsigned char o_maxdata[4]; /* max data size (??) */ | |
72 | unsigned char o_resv2[12]; /* reserved */ | |
73 | } | |
74 | AOUTHDR; | |
75 | ||
76 | #define AOUTSZ 72 | |
77 | #define SMALL_AOUTSZ (28) | |
78 | #define AOUTHDRSZ 72 | |
79 | ||
3dd657b1 | 80 | /********************** SECTION HEADER **********************/ |
252b5132 | 81 | |
252b5132 | 82 | |
3dd657b1 TR |
83 | struct external_scnhdr { |
84 | char s_name[8]; /* section name */ | |
85 | char s_paddr[4]; /* physical address, aliased s_nlib */ | |
86 | char s_vaddr[4]; /* virtual address */ | |
87 | char s_size[4]; /* section size */ | |
88 | char s_scnptr[4]; /* file ptr to raw data for section */ | |
89 | char s_relptr[4]; /* file ptr to relocation */ | |
90 | char s_lnnoptr[4]; /* file ptr to line numbers */ | |
91 | char s_nreloc[2]; /* number of relocation entries */ | |
92 | char s_nlnno[2]; /* number of line number entries*/ | |
93 | char s_flags[4]; /* flags */ | |
94 | }; | |
252b5132 | 95 | |
3dd657b1 TR |
96 | #define SCNHDR struct external_scnhdr |
97 | #define SCNHSZ 40 | |
98 | ||
99 | /********************** LINE NUMBERS **********************/ | |
100 | ||
101 | /* 1 line number entry for every "breakpointable" source line in a section. | |
102 | * Line numbers are grouped on a per function basis; first entry in a function | |
103 | * grouping will have l_lnno = 0 and in place of physical address will be the | |
104 | * symbol table index of the function name. | |
105 | */ | |
106 | struct external_lineno { | |
107 | union { | |
108 | char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ | |
109 | char l_paddr[4]; /* (physical) address of line number */ | |
110 | } l_addr; | |
111 | char l_lnno[2]; /* line number */ | |
112 | }; | |
4f1d9bd8 | 113 | |
4f1d9bd8 | 114 | |
3dd657b1 TR |
115 | #define LINENO struct external_lineno |
116 | #define LINESZ 6 | |
4f1d9bd8 | 117 | |
4f1d9bd8 | 118 | |
3dd657b1 | 119 | /********************** SYMBOLS **********************/ |
4f1d9bd8 | 120 | |
3dd657b1 TR |
121 | #define E_SYMNMLEN 8 /* # characters in a symbol name */ |
122 | #define E_FILNMLEN 14 /* # characters in a file name */ | |
123 | #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ | |
4f1d9bd8 | 124 | |
3dd657b1 TR |
125 | struct external_syment |
126 | { | |
127 | union { | |
128 | char e_name[E_SYMNMLEN]; | |
129 | struct { | |
130 | char e_zeroes[4]; | |
131 | char e_offset[4]; | |
132 | } e; | |
133 | } e; | |
134 | char e_value[4]; | |
135 | char e_scnum[2]; | |
136 | char e_type[2]; | |
137 | char e_sclass[1]; | |
138 | char e_numaux[1]; | |
139 | }; | |
4f1d9bd8 | 140 | |
4f1d9bd8 | 141 | |
4f1d9bd8 | 142 | |
3dd657b1 TR |
143 | #define N_BTMASK (017) |
144 | #define N_TMASK (060) | |
145 | #define N_BTSHFT (4) | |
146 | #define N_TSHIFT (2) | |
147 | ||
148 | ||
149 | union external_auxent { | |
150 | struct { | |
151 | char x_tagndx[4]; /* str, un, or enum tag indx */ | |
152 | union { | |
153 | struct { | |
154 | char x_lnno[2]; /* declaration line number */ | |
155 | char x_size[2]; /* str/union/array size */ | |
156 | } x_lnsz; | |
157 | char x_fsize[4]; /* size of function */ | |
158 | } x_misc; | |
159 | union { | |
160 | struct { /* if ISFCN, tag, or .bb */ | |
161 | char x_lnnoptr[4]; /* ptr to fcn line # */ | |
162 | char x_endndx[4]; /* entry ndx past block end */ | |
163 | } x_fcn; | |
164 | struct { /* if ISARY, up to 4 dimen. */ | |
165 | char x_dimen[E_DIMNUM][2]; | |
166 | } x_ary; | |
167 | } x_fcnary; | |
168 | char x_tvndx[2]; /* tv index */ | |
169 | } x_sym; | |
170 | ||
171 | union { | |
172 | char x_fname[E_FILNMLEN]; | |
173 | struct { | |
174 | char x_zeroes[4]; | |
175 | char x_offset[4]; | |
176 | } x_n; | |
177 | } x_file; | |
178 | ||
179 | struct { | |
180 | char x_scnlen[4]; /* section length */ | |
181 | char x_nreloc[2]; /* # relocation entries */ | |
182 | char x_nlinno[2]; /* # line numbers */ | |
183 | } x_scn; | |
184 | ||
185 | struct { | |
186 | char x_tvfill[4]; /* tv fill value */ | |
187 | char x_tvlen[2]; /* length of .tv */ | |
188 | char x_tvran[2][2]; /* tv range */ | |
189 | } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ | |
190 | ||
191 | struct { | |
192 | unsigned char x_scnlen[4]; | |
193 | unsigned char x_parmhash[4]; | |
194 | unsigned char x_snhash[2]; | |
195 | unsigned char x_smtyp[1]; | |
196 | unsigned char x_smclas[1]; | |
197 | unsigned char x_stab[4]; | |
198 | unsigned char x_snstab[2]; | |
199 | } x_csect; | |
4f1d9bd8 | 200 | |
252b5132 RH |
201 | }; |
202 | ||
3dd657b1 TR |
203 | #define SYMENT struct external_syment |
204 | #define SYMESZ 18 | |
252b5132 RH |
205 | #define AUXENT union external_auxent |
206 | #define AUXESZ 18 | |
207 | #define DBXMASK 0x80 /* for dbx storage mask */ | |
208 | #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) | |
209 | ||
3dd657b1 TR |
210 | |
211 | ||
252b5132 RH |
212 | /********************** RELOCATION DIRECTIVES **********************/ |
213 | ||
3dd657b1 TR |
214 | |
215 | struct external_reloc { | |
252b5132 RH |
216 | char r_vaddr[4]; |
217 | char r_symndx[4]; | |
218 | char r_size[1]; | |
219 | char r_type[1]; | |
220 | }; | |
221 | ||
3dd657b1 | 222 | |
252b5132 RH |
223 | #define RELOC struct external_reloc |
224 | #define RELSZ 10 | |
225 | ||
226 | #define DEFAULT_DATA_SECTION_ALIGNMENT 4 | |
227 | #define DEFAULT_BSS_SECTION_ALIGNMENT 4 | |
228 | #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 | |
229 | /* For new sections we havn't heard of before */ | |
230 | #define DEFAULT_SECTION_ALIGNMENT 4 | |
3dd657b1 TR |
231 | |
232 | /* The ldhdr structure. This appears at the start of the .loader | |
233 | section. */ | |
234 | ||
235 | struct external_ldhdr | |
236 | { | |
237 | bfd_byte l_version[4]; | |
238 | bfd_byte l_nsyms[4]; | |
239 | bfd_byte l_nreloc[4]; | |
240 | bfd_byte l_istlen[4]; | |
241 | bfd_byte l_nimpid[4]; | |
242 | bfd_byte l_impoff[4]; | |
243 | bfd_byte l_stlen[4]; | |
244 | bfd_byte l_stoff[4]; | |
245 | }; | |
246 | ||
247 | #define LDHDRSZ (8 * 4) | |
248 | ||
249 | struct external_ldsym | |
250 | { | |
251 | union | |
252 | { | |
253 | bfd_byte _l_name[SYMNMLEN]; | |
254 | struct | |
255 | { | |
256 | bfd_byte _l_zeroes[4]; | |
257 | bfd_byte _l_offset[4]; | |
258 | } _l_l; | |
259 | } _l; | |
260 | bfd_byte l_value[4]; | |
261 | bfd_byte l_scnum[2]; | |
262 | bfd_byte l_smtype[1]; | |
263 | bfd_byte l_smclas[1]; | |
264 | bfd_byte l_ifile[4]; | |
265 | bfd_byte l_parm[4]; | |
266 | }; | |
267 | ||
268 | #define LDSYMSZ (8 + 3 * 4 + 2 + 2) | |
269 | ||
270 | struct external_ldrel | |
271 | { | |
272 | bfd_byte l_vaddr[4]; | |
273 | bfd_byte l_symndx[4]; | |
274 | bfd_byte l_rtype[2]; | |
275 | bfd_byte l_rsecnm[2]; | |
276 | }; | |
277 | ||
278 | #define LDRELSZ (2 * 4 + 2 * 2) |