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01f873d2 ILT |
1 | /* IBM RS/6000 "XCOFF" file definitions for BFD. |
2 | Copyright (C) 1990, 1991 Free Software Foundation, Inc. | |
3 | FIXME: Can someone provide a transliteration of this name into ASCII? | |
4 | Using the following chars caused a compiler warning on HIUX (so I replaced | |
5 | them with octal escapes), and isn't useful without an understanding of what | |
6 | character set it is. | |
7 | Written by Mimi Ph\373\364ng-Th\345o V\365 of IBM | |
8 | and John Gilmore of Cygnus Support. */ | |
9 | ||
10 | /********************** FILE HEADER **********************/ | |
11 | ||
12 | struct external_filehdr { | |
13 | char f_magic[2]; /* magic number */ | |
14 | char f_nscns[2]; /* number of sections */ | |
15 | char f_timdat[4]; /* time & date stamp */ | |
16 | char f_symptr[4]; /* file pointer to symtab */ | |
17 | char f_nsyms[4]; /* number of symtab entries */ | |
18 | char f_opthdr[2]; /* sizeof(optional hdr) */ | |
19 | char f_flags[2]; /* flags */ | |
20 | }; | |
21 | ||
22 | /* IBM RS/6000 */ | |
23 | #define U802WRMAGIC 0730 /* writeable text segments **chh** */ | |
24 | #define U802ROMAGIC 0735 /* readonly sharable text segments */ | |
25 | #define U802TOCMAGIC 0737 /* readonly text segments and TOC */ | |
26 | ||
27 | #define BADMAG(x) \ | |
28 | ((x).f_magic != U802ROMAGIC && (x).f_magic != U802WRMAGIC && \ | |
29 | (x).f_magic != U802TOCMAGIC) | |
30 | ||
31 | #define FILHDR struct external_filehdr | |
32 | #define FILHSZ sizeof(FILHDR) | |
33 | ||
34 | ||
35 | /********************** AOUT "OPTIONAL HEADER" **********************/ | |
36 | ||
37 | ||
38 | typedef struct | |
39 | { | |
40 | unsigned char magic[2]; /* type of file */ | |
41 | unsigned char vstamp[2]; /* version stamp */ | |
42 | unsigned char tsize[4]; /* text size in bytes, padded to FW bdry */ | |
43 | unsigned char dsize[4]; /* initialized data " " */ | |
44 | unsigned char bsize[4]; /* uninitialized data " " */ | |
45 | unsigned char entry[4]; /* entry pt. */ | |
46 | unsigned char text_start[4]; /* base of text used for this file */ | |
47 | unsigned char data_start[4]; /* base of data used for this file */ | |
48 | unsigned char o_toc[4]; /* 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_resv1[2]; /* reserved */ | |
59 | unsigned char o_maxstack[4]; /* max stack size (??) */ | |
60 | unsigned char o_maxdata[4]; /* max data size (??) */ | |
61 | unsigned char o_resv2[12]; /* reserved */ | |
62 | } | |
63 | AOUTHDR; | |
64 | ||
65 | #define AOUTSZ (sizeof(AOUTHDR)) | |
66 | ||
67 | #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */ | |
68 | #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */ | |
69 | #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */ | |
70 | ||
71 | ||
72 | /********************** SECTION HEADER **********************/ | |
73 | ||
74 | ||
75 | struct external_scnhdr { | |
76 | char s_name[8]; /* section name */ | |
77 | char s_paddr[4]; /* physical address, aliased s_nlib */ | |
78 | char s_vaddr[4]; /* virtual address */ | |
79 | char s_size[4]; /* section size */ | |
80 | char s_scnptr[4]; /* file ptr to raw data for section */ | |
81 | char s_relptr[4]; /* file ptr to relocation */ | |
82 | char s_lnnoptr[4]; /* file ptr to line numbers */ | |
83 | char s_nreloc[2]; /* number of relocation entries */ | |
84 | char s_nlnno[2]; /* number of line number entries*/ | |
85 | char s_flags[4]; /* flags */ | |
86 | }; | |
87 | ||
88 | /* | |
89 | * names of "special" sections | |
90 | */ | |
91 | #define _TEXT ".text" | |
92 | #define _DATA ".data" | |
93 | #define _BSS ".bss" | |
94 | #define _PAD ".pad" | |
95 | #define _LOADER ".loader" | |
96 | ||
97 | #define SCNHDR struct external_scnhdr | |
98 | #define SCNHSZ sizeof(SCNHDR) | |
99 | ||
100 | /* XCOFF uses a special .loader section with type STYP_LOADER. */ | |
101 | #define STYP_LOADER 0x1000 | |
102 | ||
103 | /* XCOFF uses a special .debug section with type STYP_DEBUG. */ | |
104 | #define STYP_DEBUG 0x2000 | |
105 | ||
106 | /********************** LINE NUMBERS **********************/ | |
107 | ||
108 | /* 1 line number entry for every "breakpointable" source line in a section. | |
109 | * Line numbers are grouped on a per function basis; first entry in a function | |
110 | * grouping will have l_lnno = 0 and in place of physical address will be the | |
111 | * symbol table index of the function name. | |
112 | */ | |
113 | struct external_lineno { | |
114 | union { | |
115 | char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ | |
116 | char l_paddr[4]; /* (physical) address of line number */ | |
117 | } l_addr; | |
118 | char l_lnno[2]; /* line number */ | |
119 | }; | |
120 | ||
121 | ||
122 | #define LINENO struct external_lineno | |
123 | #define LINESZ sizeof(LINENO) | |
124 | ||
125 | ||
126 | /********************** SYMBOLS **********************/ | |
127 | ||
128 | #define E_SYMNMLEN 8 /* # characters in a symbol name */ | |
129 | #define E_FILNMLEN 14 /* # characters in a file name */ | |
130 | #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ | |
131 | ||
132 | struct external_syment | |
133 | { | |
134 | union { | |
135 | char e_name[E_SYMNMLEN]; | |
136 | struct { | |
137 | char e_zeroes[4]; | |
138 | char e_offset[4]; | |
139 | } e; | |
140 | } e; | |
141 | char e_value[4]; | |
142 | char e_scnum[2]; | |
143 | char e_type[2]; | |
144 | char e_sclass[1]; | |
145 | char e_numaux[1]; | |
146 | }; | |
147 | ||
148 | ||
149 | ||
150 | #define N_BTMASK (017) | |
151 | #define N_TMASK (060) | |
152 | #define N_BTSHFT (4) | |
153 | #define N_TSHIFT (2) | |
154 | ||
155 | ||
156 | union external_auxent { | |
157 | struct { | |
158 | char x_tagndx[4]; /* str, un, or enum tag indx */ | |
159 | union { | |
160 | struct { | |
161 | char x_lnno[2]; /* declaration line number */ | |
162 | char x_size[2]; /* str/union/array size */ | |
163 | } x_lnsz; | |
164 | char x_fsize[4]; /* size of function */ | |
165 | } x_misc; | |
166 | union { | |
167 | struct { /* if ISFCN, tag, or .bb */ | |
168 | char x_lnnoptr[4]; /* ptr to fcn line # */ | |
169 | char x_endndx[4]; /* entry ndx past block end */ | |
170 | } x_fcn; | |
171 | struct { /* if ISARY, up to 4 dimen. */ | |
172 | char x_dimen[E_DIMNUM][2]; | |
173 | } x_ary; | |
174 | } x_fcnary; | |
175 | char x_tvndx[2]; /* tv index */ | |
176 | } x_sym; | |
177 | ||
178 | union { | |
179 | char x_fname[E_FILNMLEN]; | |
180 | struct { | |
181 | char x_zeroes[4]; | |
182 | char x_offset[4]; | |
183 | } x_n; | |
184 | } x_file; | |
185 | ||
186 | struct { | |
187 | char x_scnlen[4]; /* section length */ | |
188 | char x_nreloc[2]; /* # relocation entries */ | |
189 | char x_nlinno[2]; /* # line numbers */ | |
190 | } x_scn; | |
191 | ||
192 | struct { | |
193 | char x_tvfill[4]; /* tv fill value */ | |
194 | char x_tvlen[2]; /* length of .tv */ | |
195 | char x_tvran[2][2]; /* tv range */ | |
196 | } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ | |
197 | ||
198 | struct { | |
199 | unsigned char x_scnlen[4]; | |
200 | unsigned char x_parmhash[4]; | |
201 | unsigned char x_snhash[2]; | |
202 | unsigned char x_smtyp[1]; | |
203 | unsigned char x_smclas[1]; | |
204 | unsigned char x_stab[4]; | |
205 | unsigned char x_snstab[2]; | |
206 | } x_csect; | |
207 | ||
208 | }; | |
209 | ||
210 | #define SYMENT struct external_syment | |
211 | #define SYMESZ 18 | |
212 | #define AUXENT union external_auxent | |
213 | #define AUXESZ 18 | |
214 | #define DBXMASK 0x80 /* for dbx storage mask */ | |
215 | #define SYMNAME_IN_DEBUG(symptr) ((symptr)->n_sclass & DBXMASK) | |
216 | ||
217 | ||
218 | ||
219 | /********************** RELOCATION DIRECTIVES **********************/ | |
220 | ||
221 | ||
222 | struct external_reloc { | |
223 | char r_vaddr[4]; | |
224 | char r_symndx[4]; | |
225 | char r_size[1]; | |
226 | char r_type[1]; | |
227 | }; | |
228 | ||
229 | ||
230 | #define RELOC struct external_reloc | |
231 | #define RELSZ 10 | |
232 | ||
233 | #define DEFAULT_DATA_SECTION_ALIGNMENT 4 | |
234 | #define DEFAULT_BSS_SECTION_ALIGNMENT 4 | |
235 | #define DEFAULT_TEXT_SECTION_ALIGNMENT 4 | |
236 | /* For new sections we havn't heard of before */ | |
237 | #define DEFAULT_SECTION_ALIGNMENT 4 |