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252b5132 | 1 | /* ECOFF support on MIPS machines. |
4f1d9bd8 NC |
2 | coff/ecoff.h must be included before this file. |
3 | ||
2571583a | 4 | Copyright (C) 1999-2017 Free Software Foundation, Inc. |
4f1d9bd8 NC |
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 | |
e4e42b45 | 8 | the Free Software Foundation; either version 3 of the License, or |
4f1d9bd8 NC |
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 | |
e4e42b45 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
4f1d9bd8 NC |
20 | |
21 | #define DO_NOT_DEFINE_AOUTHDR | |
22 | #define L_LNNO_SIZE 4 | |
23 | #include "coff/external.h" | |
252b5132 RH |
24 | |
25 | /* Magic numbers are defined in coff/ecoff.h. */ | |
26 | #define MIPS_ECOFF_BADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \ | |
27 | ((x).f_magic!=MIPS_MAGIC_LITTLE) &&\ | |
28 | ((x).f_magic!=MIPS_MAGIC_BIG) && \ | |
29 | ((x).f_magic!=MIPS_MAGIC_LITTLE2) && \ | |
30 | ((x).f_magic!=MIPS_MAGIC_BIG2) && \ | |
31 | ((x).f_magic!=MIPS_MAGIC_LITTLE3) && \ | |
32 | ((x).f_magic!=MIPS_MAGIC_BIG3)) | |
33 | ||
252b5132 RH |
34 | |
35 | /********************** AOUT "OPTIONAL HEADER" **********************/ | |
36 | ||
252b5132 RH |
37 | typedef struct external_aouthdr |
38 | { | |
39 | unsigned char magic[2]; /* type of file */ | |
40 | unsigned char vstamp[2]; /* version stamp */ | |
41 | unsigned char tsize[4]; /* text size in bytes, padded to FW bdry*/ | |
42 | unsigned char dsize[4]; /* initialized data " " */ | |
43 | unsigned char bsize[4]; /* uninitialized data " " */ | |
44 | unsigned char entry[4]; /* entry pt. */ | |
45 | unsigned char text_start[4]; /* base of text used for this file */ | |
46 | unsigned char data_start[4]; /* base of data used for this file */ | |
47 | unsigned char bss_start[4]; /* base of bss used for this file */ | |
48 | unsigned char gprmask[4]; /* ?? */ | |
49 | unsigned char cprmask[4][4]; /* ?? */ | |
50 | unsigned char gp_value[4]; /* value for gp register */ | |
51 | } AOUTHDR; | |
52 | ||
53 | /* compute size of a header */ | |
54 | ||
55 | #define AOUTSZ 56 | |
56 | #define AOUTHDRSZ 56 | |
57 | ||
252b5132 RH |
58 | /********************** RELOCATION DIRECTIVES **********************/ |
59 | ||
4f1d9bd8 NC |
60 | struct external_reloc |
61 | { | |
62 | unsigned char r_vaddr[4]; | |
63 | unsigned char r_bits[4]; | |
64 | }; | |
252b5132 RH |
65 | |
66 | #define RELOC struct external_reloc | |
67 | #define RELSZ 8 | |
68 | ||
69 | /* MIPS ECOFF uses a packed 8 byte format for relocs. These constants | |
70 | are used to unpack the r_bits field. */ | |
71 | ||
72 | #define RELOC_BITS0_SYMNDX_SH_LEFT_BIG 16 | |
73 | #define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE 0 | |
74 | ||
75 | #define RELOC_BITS1_SYMNDX_SH_LEFT_BIG 8 | |
76 | #define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE 8 | |
77 | ||
78 | #define RELOC_BITS2_SYMNDX_SH_LEFT_BIG 0 | |
79 | #define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE 16 | |
80 | ||
81 | /* Originally, ECOFF used four bits for the reloc type and had three | |
82 | reserved bits. Irix 4 added another bit for the reloc type, which | |
83 | was easy because it was big endian and one of the spare bits became | |
84 | the new most significant bit. To make this also work for little | |
85 | endian ECOFF, we need to wrap one of the reserved bits around to | |
86 | become the most significant bit of the reloc type. */ | |
87 | #define RELOC_BITS3_TYPE_BIG 0x3E | |
88 | #define RELOC_BITS3_TYPE_SH_BIG 1 | |
89 | #define RELOC_BITS3_TYPE_LITTLE 0x78 | |
90 | #define RELOC_BITS3_TYPE_SH_LITTLE 3 | |
91 | #define RELOC_BITS3_TYPEHI_LITTLE 0x04 | |
92 | #define RELOC_BITS3_TYPEHI_SH_LITTLE 2 | |
93 | ||
94 | #define RELOC_BITS3_EXTERN_BIG 0x01 | |
95 | #define RELOC_BITS3_EXTERN_LITTLE 0x80 | |
96 | ||
97 | /* The r_type field in a reloc is one of the following values. I | |
98 | don't know if any other values can appear. These seem to be all | |
99 | that occur in the Ultrix 4.2 libraries. */ | |
100 | #define MIPS_R_IGNORE 0 | |
101 | #define MIPS_R_REFHALF 1 | |
102 | #define MIPS_R_REFWORD 2 | |
103 | #define MIPS_R_JMPADDR 3 | |
104 | #define MIPS_R_REFHI 4 | |
105 | #define MIPS_R_REFLO 5 | |
106 | #define MIPS_R_GPREL 6 | |
107 | #define MIPS_R_LITERAL 7 | |
108 | ||
3e27568f CD |
109 | /* FIXME: This relocation is used (internally only) to represent branches |
110 | when assembling. It should never appear in output files, and | |
111 | be removed. (It used to be used for embedded-PIC support.) */ | |
252b5132 | 112 | #define MIPS_R_PCREL16 12 |
252b5132 RH |
113 | |
114 | /********************** STABS **********************/ | |
115 | ||
116 | #define MIPS_IS_STAB ECOFF_IS_STAB | |
117 | #define MIPS_MARK_STAB ECOFF_MARK_STAB | |
118 | #define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB | |
119 | ||
120 | /********************** SYMBOLIC INFORMATION **********************/ | |
121 | ||
122 | /* Written by John Gilmore. */ | |
123 | ||
124 | /* ECOFF uses COFF-like section structures, but its own symbol format. | |
125 | This file defines the symbol format in fields whose size and alignment | |
126 | will not vary on different host systems. */ | |
127 | ||
128 | /* File header as a set of bytes */ | |
129 | ||
4f1d9bd8 NC |
130 | struct hdr_ext |
131 | { | |
252b5132 RH |
132 | unsigned char h_magic[2]; |
133 | unsigned char h_vstamp[2]; | |
134 | unsigned char h_ilineMax[4]; | |
135 | unsigned char h_cbLine[4]; | |
136 | unsigned char h_cbLineOffset[4]; | |
137 | unsigned char h_idnMax[4]; | |
138 | unsigned char h_cbDnOffset[4]; | |
139 | unsigned char h_ipdMax[4]; | |
140 | unsigned char h_cbPdOffset[4]; | |
141 | unsigned char h_isymMax[4]; | |
142 | unsigned char h_cbSymOffset[4]; | |
143 | unsigned char h_ioptMax[4]; | |
144 | unsigned char h_cbOptOffset[4]; | |
145 | unsigned char h_iauxMax[4]; | |
146 | unsigned char h_cbAuxOffset[4]; | |
147 | unsigned char h_issMax[4]; | |
148 | unsigned char h_cbSsOffset[4]; | |
149 | unsigned char h_issExtMax[4]; | |
150 | unsigned char h_cbSsExtOffset[4]; | |
151 | unsigned char h_ifdMax[4]; | |
152 | unsigned char h_cbFdOffset[4]; | |
153 | unsigned char h_crfd[4]; | |
154 | unsigned char h_cbRfdOffset[4]; | |
155 | unsigned char h_iextMax[4]; | |
156 | unsigned char h_cbExtOffset[4]; | |
157 | }; | |
158 | ||
159 | /* File descriptor external record */ | |
160 | ||
4f1d9bd8 NC |
161 | struct fdr_ext |
162 | { | |
252b5132 RH |
163 | unsigned char f_adr[4]; |
164 | unsigned char f_rss[4]; | |
165 | unsigned char f_issBase[4]; | |
166 | unsigned char f_cbSs[4]; | |
167 | unsigned char f_isymBase[4]; | |
168 | unsigned char f_csym[4]; | |
169 | unsigned char f_ilineBase[4]; | |
170 | unsigned char f_cline[4]; | |
171 | unsigned char f_ioptBase[4]; | |
172 | unsigned char f_copt[4]; | |
173 | unsigned char f_ipdFirst[2]; | |
174 | unsigned char f_cpd[2]; | |
175 | unsigned char f_iauxBase[4]; | |
176 | unsigned char f_caux[4]; | |
177 | unsigned char f_rfdBase[4]; | |
178 | unsigned char f_crfd[4]; | |
179 | unsigned char f_bits1[1]; | |
180 | unsigned char f_bits2[3]; | |
181 | unsigned char f_cbLineOffset[4]; | |
182 | unsigned char f_cbLine[4]; | |
183 | }; | |
184 | ||
185 | #define FDR_BITS1_LANG_BIG 0xF8 | |
186 | #define FDR_BITS1_LANG_SH_BIG 3 | |
187 | #define FDR_BITS1_LANG_LITTLE 0x1F | |
188 | #define FDR_BITS1_LANG_SH_LITTLE 0 | |
189 | ||
190 | #define FDR_BITS1_FMERGE_BIG 0x04 | |
191 | #define FDR_BITS1_FMERGE_LITTLE 0x20 | |
192 | ||
193 | #define FDR_BITS1_FREADIN_BIG 0x02 | |
194 | #define FDR_BITS1_FREADIN_LITTLE 0x40 | |
195 | ||
196 | #define FDR_BITS1_FBIGENDIAN_BIG 0x01 | |
197 | #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80 | |
198 | ||
199 | #define FDR_BITS2_GLEVEL_BIG 0xC0 | |
200 | #define FDR_BITS2_GLEVEL_SH_BIG 6 | |
201 | #define FDR_BITS2_GLEVEL_LITTLE 0x03 | |
202 | #define FDR_BITS2_GLEVEL_SH_LITTLE 0 | |
203 | ||
204 | /* We ignore the `reserved' field in bits2. */ | |
205 | ||
206 | /* Procedure descriptor external record */ | |
207 | ||
4f1d9bd8 NC |
208 | struct pdr_ext |
209 | { | |
252b5132 RH |
210 | unsigned char p_adr[4]; |
211 | unsigned char p_isym[4]; | |
212 | unsigned char p_iline[4]; | |
213 | unsigned char p_regmask[4]; | |
214 | unsigned char p_regoffset[4]; | |
215 | unsigned char p_iopt[4]; | |
216 | unsigned char p_fregmask[4]; | |
217 | unsigned char p_fregoffset[4]; | |
218 | unsigned char p_frameoffset[4]; | |
219 | unsigned char p_framereg[2]; | |
220 | unsigned char p_pcreg[2]; | |
221 | unsigned char p_lnLow[4]; | |
222 | unsigned char p_lnHigh[4]; | |
223 | unsigned char p_cbLineOffset[4]; | |
224 | }; | |
225 | ||
226 | /* Runtime procedure table */ | |
227 | ||
4f1d9bd8 NC |
228 | struct rpdr_ext |
229 | { | |
252b5132 RH |
230 | unsigned char p_adr[4]; |
231 | unsigned char p_regmask[4]; | |
232 | unsigned char p_regoffset[4]; | |
233 | unsigned char p_fregmask[4]; | |
234 | unsigned char p_fregoffset[4]; | |
235 | unsigned char p_frameoffset[4]; | |
236 | unsigned char p_framereg[2]; | |
237 | unsigned char p_pcreg[2]; | |
238 | unsigned char p_irpss[4]; | |
239 | unsigned char p_reserved[4]; | |
240 | unsigned char p_exception_info[4]; | |
241 | }; | |
242 | ||
243 | /* Line numbers */ | |
244 | ||
4f1d9bd8 NC |
245 | struct line_ext |
246 | { | |
252b5132 RH |
247 | unsigned char l_line[4]; |
248 | }; | |
249 | ||
250 | /* Symbol external record */ | |
251 | ||
4f1d9bd8 NC |
252 | struct sym_ext |
253 | { | |
252b5132 RH |
254 | unsigned char s_iss[4]; |
255 | unsigned char s_value[4]; | |
256 | unsigned char s_bits1[1]; | |
257 | unsigned char s_bits2[1]; | |
258 | unsigned char s_bits3[1]; | |
259 | unsigned char s_bits4[1]; | |
260 | }; | |
261 | ||
262 | #define SYM_BITS1_ST_BIG 0xFC | |
263 | #define SYM_BITS1_ST_SH_BIG 2 | |
264 | #define SYM_BITS1_ST_LITTLE 0x3F | |
265 | #define SYM_BITS1_ST_SH_LITTLE 0 | |
266 | ||
267 | #define SYM_BITS1_SC_BIG 0x03 | |
268 | #define SYM_BITS1_SC_SH_LEFT_BIG 3 | |
269 | #define SYM_BITS1_SC_LITTLE 0xC0 | |
270 | #define SYM_BITS1_SC_SH_LITTLE 6 | |
271 | ||
272 | #define SYM_BITS2_SC_BIG 0xE0 | |
273 | #define SYM_BITS2_SC_SH_BIG 5 | |
274 | #define SYM_BITS2_SC_LITTLE 0x07 | |
275 | #define SYM_BITS2_SC_SH_LEFT_LITTLE 2 | |
276 | ||
277 | #define SYM_BITS2_RESERVED_BIG 0x10 | |
278 | #define SYM_BITS2_RESERVED_LITTLE 0x08 | |
279 | ||
280 | #define SYM_BITS2_INDEX_BIG 0x0F | |
281 | #define SYM_BITS2_INDEX_SH_LEFT_BIG 16 | |
282 | #define SYM_BITS2_INDEX_LITTLE 0xF0 | |
283 | #define SYM_BITS2_INDEX_SH_LITTLE 4 | |
284 | ||
285 | #define SYM_BITS3_INDEX_SH_LEFT_BIG 8 | |
286 | #define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4 | |
287 | ||
288 | #define SYM_BITS4_INDEX_SH_LEFT_BIG 0 | |
289 | #define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12 | |
290 | ||
291 | /* External symbol external record */ | |
292 | ||
4f1d9bd8 NC |
293 | struct ext_ext |
294 | { | |
252b5132 RH |
295 | unsigned char es_bits1[1]; |
296 | unsigned char es_bits2[1]; | |
297 | unsigned char es_ifd[2]; | |
298 | struct sym_ext es_asym; | |
299 | }; | |
300 | ||
301 | #define EXT_BITS1_JMPTBL_BIG 0x80 | |
302 | #define EXT_BITS1_JMPTBL_LITTLE 0x01 | |
303 | ||
304 | #define EXT_BITS1_COBOL_MAIN_BIG 0x40 | |
305 | #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02 | |
306 | ||
307 | #define EXT_BITS1_WEAKEXT_BIG 0x20 | |
308 | #define EXT_BITS1_WEAKEXT_LITTLE 0x04 | |
309 | ||
310 | /* Dense numbers external record */ | |
311 | ||
4f1d9bd8 NC |
312 | struct dnr_ext |
313 | { | |
252b5132 RH |
314 | unsigned char d_rfd[4]; |
315 | unsigned char d_index[4]; | |
316 | }; | |
317 | ||
318 | /* Relative file descriptor */ | |
319 | ||
4f1d9bd8 NC |
320 | struct rfd_ext |
321 | { | |
252b5132 RH |
322 | unsigned char rfd[4]; |
323 | }; | |
324 | ||
325 | /* Optimizer symbol external record */ | |
326 | ||
4f1d9bd8 NC |
327 | struct opt_ext |
328 | { | |
252b5132 RH |
329 | unsigned char o_bits1[1]; |
330 | unsigned char o_bits2[1]; | |
331 | unsigned char o_bits3[1]; | |
332 | unsigned char o_bits4[1]; | |
333 | struct rndx_ext o_rndx; | |
334 | unsigned char o_offset[4]; | |
335 | }; | |
336 | ||
337 | #define OPT_BITS2_VALUE_SH_LEFT_BIG 16 | |
338 | #define OPT_BITS2_VALUE_SH_LEFT_LITTLE 0 | |
339 | ||
340 | #define OPT_BITS3_VALUE_SH_LEFT_BIG 8 | |
341 | #define OPT_BITS3_VALUE_SH_LEFT_LITTLE 8 | |
342 | ||
343 | #define OPT_BITS4_VALUE_SH_LEFT_BIG 0 | |
344 | #define OPT_BITS4_VALUE_SH_LEFT_LITTLE 16 |