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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
66a45dd3 PM |
2 | /* IBM RS/6000 "XCOFF" file definitions for BFD. |
3 | Copyright (C) 1990, 1991 Free Software Foundation, Inc. | |
4 | FIXME: Can someone provide a transliteration of this name into ASCII? | |
5 | Using the following chars caused a compiler warning on HIUX (so I replaced | |
6 | them with octal escapes), and isn't useful without an understanding of what | |
7 | character set it is. | |
8 | Written by Mimi Ph\373\364ng-Th\345o V\365 of IBM | |
9 | and John Gilmore of Cygnus Support. */ | |
10 | ||
11 | /********************** FILE HEADER **********************/ | |
12 | ||
13 | struct external_filehdr { | |
14 | char f_magic[2]; /* magic number */ | |
15 | char f_nscns[2]; /* number of sections */ | |
16 | char f_timdat[4]; /* time & date stamp */ | |
17 | char f_symptr[4]; /* file pointer to symtab */ | |
18 | char f_nsyms[4]; /* number of symtab entries */ | |
19 | char f_opthdr[2]; /* sizeof(optional hdr) */ | |
20 | char f_flags[2]; /* flags */ | |
21 | }; | |
22 | ||
23 | /* IBM RS/6000 */ | |
24 | #define U802WRMAGIC 0730 /* writeable text segments **chh** */ | |
25 | #define U802ROMAGIC 0735 /* readonly sharable text segments */ | |
26 | #define U802TOCMAGIC 0737 /* readonly text segments and TOC */ | |
27 | ||
28 | #define BADMAG(x) \ | |
29 | ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \ | |
30 | (x).f_magic != U802TOCMAGIC) | |
31 | ||
32 | #define FILHDR struct external_filehdr | |
33 | #define FILHSZ 20 | |
34 | ||
35 | ||
36 | /********************** AOUT "OPTIONAL HEADER" **********************/ | |
37 | ||
38 | ||
39 | typedef struct | |
40 | { | |
41 | unsigned char magic[2]; /* type of file */ | |
42 | unsigned char vstamp[2]; /* version stamp */ | |
43 | unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */ | |
44 | unsigned char dsize[4]; /* initialized data " " */ | |
45 | unsigned char bsize[4]; /* uninitialized data " " */ | |
46 | unsigned char entry[4]; /* entry pt. */ | |
47 | unsigned char text_start[4]; /* base of text used for this file */ | |
48 | unsigned char data_start[4]; /* base of data used for this file */ | |
49 | unsigned char o_toc[4]; /* 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_maxstack[4]; /* max stack size (??) */ | |
61 | unsigned char o_maxdata[4]; /* max data size (??) */ | |
62 | unsigned char o_resv2[12]; /* reserved */ | |
63 | } | |
64 | AOUTHDR; | |
65 | ||
66 | #define AOUTSZ 72 | |
67 | #define SMALL_AOUTSZ (28) | |
68 | #define AOUTHDRSZ 72 | |
69 | ||
70 | #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */ | |
71 | #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */ | |
72 | #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */ | |
73 | ||
74 | ||
75 | /********************** SECTION HEADER **********************/ | |
76 | ||
77 | ||
78 | struct external_scnhdr { | |
79 | char s_name[8]; /* section name */ | |
80 | char s_paddr[4]; /* physical address, aliased s_nlib */ | |
81 | char s_vaddr[4]; /* virtual address */ | |
82 | char s_size[4]; /* section size */ | |
83 | char s_scnptr[4]; /* file ptr to raw data for section */ | |
84 | char s_relptr[4]; /* file ptr to relocation */ | |
85 | char s_lnnoptr[4]; /* file ptr to line numbers */ | |
86 | char s_nreloc[2]; /* number of relocation entries */ | |
87 | char s_nlnno[2]; /* number of line number entries*/ | |
88 | char s_flags[4]; /* flags */ | |
89 | }; | |
90 | ||
91 | /* | |
92 | * names of "special" sections | |
93 | */ | |
94 | #define _TEXT ".text" | |
95 | #define _DATA ".data" | |
96 | #define _BSS ".bss" | |
97 | #define _PAD ".pad" | |
98 | #define _LOADER ".loader" | |
99 | ||
100 | #define SCNHDR struct external_scnhdr | |
101 | #define SCNHSZ 40 | |
102 | ||
103 | /* XCOFF uses a special .loader section with type STYP_LOADER. */ | |
104 | #define STYP_LOADER 0x1000 | |
105 | ||
106 | /* XCOFF uses a special .debug section with type STYP_DEBUG. */ | |
107 | #define STYP_DEBUG 0x2000 | |
108 | ||
109 | /* XCOFF handles line number or relocation overflow by creating | |
110 | another section header with STYP_OVRFLO set. */ | |
111 | #define STYP_OVRFLO 0x8000 | |
112 | ||
113 | /********************** LINE NUMBERS **********************/ | |
114 | ||
115 | /* 1 line number entry for every "breakpointable" source line in a section. | |
116 | * Line numbers are grouped on a per function basis; first entry in a function | |
117 | * grouping will have l_lnno = 0 and in place of physical address will be the | |
118 | * symbol table index of the function name. | |
119 | */ | |
120 | struct external_lineno { | |
121 | union { | |
122 | char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ | |
123 | char l_paddr[4]; /* (physical) address of line number */ | |
124 | } l_addr; | |
125 | char l_lnno[2]; /* line number */ | |
126 | }; | |
127 | ||
128 | ||
129 | #define LINENO struct external_lineno | |
130 | #define LINESZ 6 | |
131 | ||
132 | ||
133 | /********************** SYMBOLS **********************/ | |
134 | ||
135 | #define E_SYMNMLEN 8 /* # characters in a symbol name */ | |
136 | #define E_FILNMLEN 14 /* # characters in a file name */ | |
137 | #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ | |
138 | ||
139 | struct external_syment | |
140 | { | |
141 | union { | |
142 | char e_name[E_SYMNMLEN]; | |
143 | struct { | |
144 | char e_zeroes[4]; | |
145 | char e_offset[4]; | |
146 | } e; | |
147 | } e; | |
148 | char e_value[4]; | |
149 | char e_scnum[2]; | |
150 | char e_type[2]; | |
151 | char e_sclass[1]; | |
152 | char e_numaux[1]; | |
153 | }; | |
154 | ||
155 | ||
156 | ||
157 | #define N_BTMASK (017) | |
158 | #define N_TMASK (060) | |
159 | #define N_BTSHFT (4) | |
160 | #define N_TSHIFT (2) | |
161 | ||
162 | ||
163 | union external_auxent { | |
164 | struct { | |
165 | char x_tagndx[4]; /* str, un, or enum tag indx */ | |
166 | union { | |
167 | struct { | |
168 | char x_lnno[2]; /* declaration line number */ | |
169 | char x_size[2]; /* str/union/array size */ | |
170 | } x_lnsz; | |
171 | char x_fsize[4]; /* size of function */ | |
172 | } x_misc; | |
173 | union { | |
174 | struct { /* if ISFCN, tag, or .bb */ | |
175 | char x_lnnoptr[4]; /* ptr to fcn line # */ | |
176 | char x_endndx[4]; /* entry ndx past block end */ | |
177 | } x_fcn; | |
178 | struct { /* if ISARY, up to 4 dimen. */ | |
179 | char x_dimen[E_DIMNUM][2]; | |
180 | } x_ary; | |
181 | } x_fcnary; | |
182 | char x_tvndx[2]; /* tv index */ | |
183 | } x_sym; | |
184 | ||
185 | union { | |
186 | char x_fname[E_FILNMLEN]; | |
187 | struct { | |
188 | char x_zeroes[4]; | |
189 | char x_offset[4]; | |
190 | } x_n; | |
191 | } x_file; | |
192 | ||
193 | struct { | |
194 | char x_scnlen[4]; /* section length */ | |
195 | char x_nreloc[2]; /* # relocation entries */ | |
196 | char x_nlinno[2]; /* # line numbers */ | |
197 | } x_scn; | |
198 | ||
199 | struct { | |
200 | char x_tvfill[4]; /* tv fill value */ | |
201 | char x_tvlen[2]; /* length of .tv */ | |
202 | char x_tvran[2][2]; /* tv range */ | |
203 | } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ | |
204 | ||
205 | struct { | |
206 | unsigned char x_scnlen[4]; | |
207 | unsigned char x_parmhash[4]; | |
208 | unsigned char x_snhash[2]; | |
209 | unsigned char x_smtyp[1]; | |
210 | unsigned char x_smclas[1]; | |
211 | unsigned char x_stab[4]; | |
212 | unsigned char x_snstab[2]; | |
213 | } x_csect; | |
214 | ||
215 | }; | |
216 | ||
217 | #define SYMENT struct external_syment | |
218 | #define SYMESZ 18 | |
219 | #define AUXENT union external_auxent | |
220 | #define AUXESZ 18 | |
221 | #define DBXMASK 0x80 /* for dbx storage mask */ | |
222 | #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) | |
223 | ||
224 | ||
225 | ||
226 | /********************** RELOCATION DIRECTIVES **********************/ | |
227 | ||
228 | ||
229 | struct external_reloc { | |
230 | char r_vaddr[4]; | |
231 | char r_symndx[4]; | |
232 | char r_size[1]; | |
233 | char r_type[1]; | |
234 | }; | |
235 | ||
236 | ||
237 | #define RELOC struct external_reloc | |
238 | #define RELSZ 10 | |
239 | ||
240 | #define DEFAULT_DATA_SECTION_ALIGNMENT 4 | |
241 | #define DEFAULT_BSS_SECTION_ALIGNMENT 4 | |
242 | #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 | |
446957ba | 243 | /* For new sections we haven't heard of before */ |
66a45dd3 | 244 | #define DEFAULT_SECTION_ALIGNMENT 4 |