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3b16e843 NC |
1 | /* COFF specification for OpenRISC 1000. |
2 | Copyright (C) 1993-2000, 2002 Free Software Foundation, Inc. | |
3 | Contributed by David Wood @ New York University. | |
4 | Modified by Johan Rydberg, <johan.rydberg@netinsight.se> | |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #ifndef OR32 | |
23 | # define OR32 | |
24 | #endif | |
25 | ||
26 | /* File Header and related definitions. */ | |
27 | struct external_filehdr | |
28 | { | |
29 | char f_magic[2]; /* magic number */ | |
30 | char f_nscns[2]; /* number of sections */ | |
31 | char f_timdat[4]; /* time & date stamp */ | |
32 | char f_symptr[4]; /* file pointer to symtab */ | |
33 | char f_nsyms[4]; /* number of symtab entries */ | |
34 | char f_opthdr[2]; /* sizeof(optional hdr) */ | |
35 | char f_flags[2]; /* flags */ | |
36 | }; | |
37 | ||
38 | #define FILHDR struct external_filehdr | |
39 | #define FILHSZ 20 | |
40 | ||
41 | /* Magic numbers for OpenRISC 1000. As it is know we use the | |
42 | numbers for Am29000. | |
43 | ||
44 | (AT&T will assign the "real" magic number). */ | |
45 | #define SIPFBOMAGIC 0572 /* Am29000 (Byte 0 is MSB). */ | |
46 | #define SIPRBOMAGIC 0573 /* Am29000 (Byte 0 is LSB). */ | |
47 | ||
48 | #define OR32_MAGIC_BIG SIPFBOMAGIC | |
49 | #define OR32_MAGIC_LITTLE SIPRBOMAGIC | |
50 | #define OR32BADMAG(x) (((x).f_magic!=OR32_MAGIC_BIG) && \ | |
51 | ((x).f_magic!=OR32_MAGIC_LITTLE)) | |
52 | ||
53 | #define OMAGIC OR32_MAGIC_BIG | |
54 | ||
55 | /* Optional (a.out) header. */ | |
56 | typedef struct external_aouthdr | |
57 | { | |
58 | char magic[2]; /* type of file */ | |
59 | char vstamp[2]; /* version stamp */ | |
60 | char tsize[4]; /* text size in bytes, padded to FW bdry */ | |
61 | char dsize[4]; /* initialized data " " */ | |
62 | char bsize[4]; /* uninitialized data " " */ | |
63 | char entry[4]; /* entry pt. */ | |
64 | char text_start[4]; /* base of text used for this file */ | |
65 | char data_start[4]; /* base of data used for this file */ | |
66 | } AOUTHDR; | |
67 | ||
68 | #define AOUTSZ 28 | |
69 | #define AOUTHDRSZ 28 | |
70 | ||
71 | /* aouthdr magic numbers. */ | |
72 | #define NMAGIC 0410 /* separate i/d executable. */ | |
73 | #define SHMAGIC 0406 /* NYU/Ultra3 shared data executable | |
74 | (writable text). */ | |
75 | ||
76 | #define _ETEXT "_etext" | |
77 | ||
78 | /* Section header and related definitions. */ | |
79 | struct external_scnhdr | |
80 | { | |
81 | char s_name[8]; /* section name */ | |
82 | char s_paddr[4]; /* physical address, aliased s_nlib */ | |
83 | char s_vaddr[4]; /* virtual address */ | |
84 | char s_size[4]; /* section size */ | |
85 | char s_scnptr[4]; /* file ptr to raw data for section */ | |
86 | char s_relptr[4]; /* file ptr to relocation */ | |
87 | char s_lnnoptr[4]; /* file ptr to line numbers */ | |
88 | char s_nreloc[2]; /* number of relocation entries */ | |
89 | char s_nlnno[2]; /* number of line number entries */ | |
90 | char s_flags[4]; /* flags */ | |
91 | }; | |
92 | ||
93 | #define SCNHDR struct external_scnhdr | |
94 | #define SCNHSZ 40 | |
95 | ||
96 | /* Names of "special" sections: */ | |
97 | #define _TEXT ".text" | |
98 | #define _DATA ".data" | |
99 | #define _BSS ".bss" | |
100 | #define _LIT ".lit" | |
101 | ||
102 | /* Section types - with additional section type for global | |
103 | registers which will be relocatable for the OpenRISC 1000. | |
104 | ||
105 | In instances where it is necessary for a linker to produce an | |
106 | output file which contains text or data not based at virtual | |
107 | address 0, e.g. for a ROM, then the linker should accept | |
108 | address base information as command input and use PAD sections | |
109 | to skip over unused addresses. */ | |
110 | #define STYP_BSSREG 0x1200 /* Global register area (like STYP_INFO) */ | |
111 | #define STYP_ENVIR 0x2200 /* Environment (like STYP_INFO) */ | |
112 | #define STYP_ABS 0x4000 /* Absolute (allocated, not reloc, loaded) */ | |
113 | ||
114 | /* Relocation information declaration and related definitions: */ | |
115 | struct external_reloc | |
116 | { | |
117 | char r_vaddr[4]; /* (virtual) address of reference */ | |
118 | char r_symndx[4]; /* index into symbol table */ | |
119 | char r_type[2]; /* relocation type */ | |
120 | }; | |
121 | ||
122 | #define RELOC struct external_reloc | |
123 | #define RELSZ 10 /* sizeof (RELOC) */ | |
124 | ||
125 | /* Relocation types for the OpenRISC 1000: */ | |
126 | ||
127 | #define R_ABS 0 /* reference is absolute */ | |
128 | #define R_IREL 030 /* instruction relative (jmp/call) */ | |
129 | #define R_IABS 031 /* instruction absolute (jmp/call) */ | |
130 | #define R_ILOHALF 032 /* instruction low half (const) */ | |
131 | #define R_IHIHALF 033 /* instruction high half (consth) part 1 */ | |
132 | #define R_IHCONST 034 /* instruction high half (consth) part 2 */ | |
133 | /* constant offset of R_IHIHALF relocation */ | |
134 | #define R_BYTE 035 /* relocatable byte value */ | |
135 | #define R_HWORD 036 /* relocatable halfword value */ | |
136 | #define R_WORD 037 /* relocatable word value */ | |
137 | ||
138 | #define R_IGLBLRC 040 /* instruction global register RC */ | |
139 | #define R_IGLBLRA 041 /* instruction global register RA */ | |
140 | #define R_IGLBLRB 042 /* instruction global register RB */ | |
141 | ||
142 | /* | |
143 | NOTE: | |
144 | All the "I" forms refer to 29000 instruction formats. The linker is | |
145 | expected to know how the numeric information is split and/or aligned | |
146 | within the instruction word(s). R_BYTE works for instructions, too. | |
147 | ||
148 | If the parameter to a CONSTH instruction is a relocatable type, two | |
149 | relocation records are written. The first has an r_type of R_IHIHALF | |
150 | (33 octal) and a normal r_vaddr and r_symndx. The second relocation | |
151 | record has an r_type of R_IHCONST (34 octal), a normal r_vaddr (which | |
152 | is redundant), and an r_symndx containing the 32-bit constant offset | |
153 | to the relocation instead of the actual symbol table index. This | |
154 | second record is always written, even if the constant offset is zero. | |
155 | The constant fields of the instruction are set to zero. */ | |
156 | ||
157 | /* Line number entry declaration and related definitions: */ | |
158 | struct external_lineno | |
159 | { | |
160 | union | |
161 | { | |
162 | char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ | |
163 | char l_paddr[4]; /* (physical) address of line number */ | |
164 | } | |
165 | l_addr; | |
166 | ||
167 | char l_lnno[2]; /* line number */ | |
168 | }; | |
169 | ||
170 | #define LINENO struct external_lineno | |
171 | #define LINESZ 6 /* sizeof (LINENO) */ | |
172 | ||
173 | /* Symbol entry declaration and related definitions: */ | |
174 | #define E_SYMNMLEN 8 /* Number of characters in a symbol name */ | |
175 | ||
176 | struct external_syment | |
177 | { | |
178 | union | |
179 | { | |
180 | char e_name[E_SYMNMLEN]; | |
181 | struct | |
182 | { | |
183 | char e_zeroes[4]; | |
184 | char e_offset[4]; | |
185 | } | |
186 | e; | |
187 | } | |
188 | e; | |
189 | ||
190 | char e_value[4]; | |
191 | char e_scnum[2]; | |
192 | char e_type[2]; | |
193 | char e_sclass[1]; | |
194 | char e_numaux[1]; | |
195 | }; | |
196 | ||
197 | #define SYMENT struct external_syment | |
198 | #define SYMESZ 18 | |
199 | ||
200 | /* Storage class definitions - new classes for global registers: */ | |
201 | #define C_GLBLREG 19 /* global register */ | |
202 | #define C_EXTREG 20 /* external global register */ | |
203 | #define C_DEFREG 21 /* ext. def. of global register */ | |
204 | ||
205 | /* Derived symbol mask/shifts: */ | |
206 | #define N_BTMASK (0xf) | |
207 | #define N_BTSHFT (4) | |
208 | #define N_TMASK (0x30) | |
209 | #define N_TSHIFT (2) | |
210 | ||
211 | /* Auxiliary symbol table entry declaration and related | |
212 | definitions. */ | |
213 | #define E_FILNMLEN 14 /* # characters in a file name */ | |
214 | #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ | |
215 | ||
216 | union external_auxent | |
217 | { | |
218 | struct | |
219 | { | |
220 | char x_tagndx[4]; /* str, un, or enum tag indx */ | |
221 | union | |
222 | { | |
223 | struct | |
224 | { | |
225 | char x_lnno[2]; /* declaration line number */ | |
226 | char x_size[2]; /* str/union/array size */ | |
227 | } | |
228 | x_lnsz; | |
229 | ||
230 | char x_fsize[4]; /* size of function */ | |
231 | } | |
232 | x_misc; | |
233 | ||
234 | union | |
235 | { | |
236 | struct /* if ISFCN, tag, or .bb */ | |
237 | { | |
238 | char x_lnnoptr[4]; /* ptr to fcn line # */ | |
239 | char x_endndx[4]; /* entry ndx past block end */ | |
240 | } | |
241 | x_fcn; | |
242 | ||
243 | struct /* if ISARY, up to 4 dimen. */ | |
244 | { | |
245 | char x_dimen[E_DIMNUM][2]; | |
246 | } | |
247 | x_ary; | |
248 | } | |
249 | x_fcnary; | |
250 | ||
251 | char x_tvndx[2]; /* tv index */ | |
252 | } | |
253 | x_sym; | |
254 | ||
255 | union | |
256 | { | |
257 | char x_fname[E_FILNMLEN]; | |
258 | ||
259 | struct | |
260 | { | |
261 | char x_zeroes[4]; | |
262 | char x_offset[4]; | |
263 | } | |
264 | x_n; | |
265 | } | |
266 | x_file; | |
267 | ||
268 | struct | |
269 | { | |
270 | char x_scnlen[4]; /* section length */ | |
271 | char x_nreloc[2]; /* # relocation entries */ | |
272 | char x_nlinno[2]; /* # line numbers */ | |
273 | } | |
274 | x_scn; | |
275 | ||
276 | struct | |
277 | { | |
278 | char x_tvfill[4]; /* tv fill value */ | |
279 | char x_tvlen[2]; /* length of .tv */ | |
280 | char x_tvran[2][2]; /* tv range */ | |
281 | } | |
282 | x_tv; /* info about .tv section | |
283 | (in auxent of symbol .tv)) */ | |
284 | }; | |
285 | ||
286 | #define AUXENT union external_auxent | |
287 | #define AUXESZ 18 |