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252b5132 RH |
1 | /* ECOFF support on MIPS machines. |
2 | coff/ecoff.h must be included before this file. */ | |
3 | ||
4 | /********************** FILE HEADER **********************/ | |
5 | ||
6 | struct external_filehdr { | |
7 | unsigned char f_magic[2]; /* magic number */ | |
8 | unsigned char f_nscns[2]; /* number of sections */ | |
9 | unsigned char f_timdat[4]; /* time & date stamp */ | |
10 | unsigned char f_symptr[4]; /* file pointer to symtab */ | |
11 | unsigned char f_nsyms[4]; /* number of symtab entries */ | |
12 | unsigned char f_opthdr[2]; /* sizeof(optional hdr) */ | |
13 | unsigned char f_flags[2]; /* flags */ | |
14 | }; | |
15 | ||
16 | /* Magic numbers are defined in coff/ecoff.h. */ | |
17 | #define MIPS_ECOFF_BADMAG(x) (((x).f_magic!=MIPS_MAGIC_1) && \ | |
18 | ((x).f_magic!=MIPS_MAGIC_LITTLE) &&\ | |
19 | ((x).f_magic!=MIPS_MAGIC_BIG) && \ | |
20 | ((x).f_magic!=MIPS_MAGIC_LITTLE2) && \ | |
21 | ((x).f_magic!=MIPS_MAGIC_BIG2) && \ | |
22 | ((x).f_magic!=MIPS_MAGIC_LITTLE3) && \ | |
23 | ((x).f_magic!=MIPS_MAGIC_BIG3)) | |
24 | ||
25 | #define FILHDR struct external_filehdr | |
26 | #define FILHSZ 20 | |
27 | ||
28 | /********************** AOUT "OPTIONAL HEADER" **********************/ | |
29 | ||
30 | ||
31 | typedef struct external_aouthdr | |
32 | { | |
33 | unsigned char magic[2]; /* type of file */ | |
34 | unsigned char vstamp[2]; /* version stamp */ | |
35 | unsigned char tsize[4]; /* text size in bytes, padded to FW bdry*/ | |
36 | unsigned char dsize[4]; /* initialized data " " */ | |
37 | unsigned char bsize[4]; /* uninitialized data " " */ | |
38 | unsigned char entry[4]; /* entry pt. */ | |
39 | unsigned char text_start[4]; /* base of text used for this file */ | |
40 | unsigned char data_start[4]; /* base of data used for this file */ | |
41 | unsigned char bss_start[4]; /* base of bss used for this file */ | |
42 | unsigned char gprmask[4]; /* ?? */ | |
43 | unsigned char cprmask[4][4]; /* ?? */ | |
44 | unsigned char gp_value[4]; /* value for gp register */ | |
45 | } AOUTHDR; | |
46 | ||
47 | /* compute size of a header */ | |
48 | ||
49 | #define AOUTSZ 56 | |
50 | #define AOUTHDRSZ 56 | |
51 | ||
52 | /********************** SECTION HEADER **********************/ | |
53 | ||
54 | struct external_scnhdr { | |
55 | unsigned char s_name[8]; /* section name */ | |
56 | unsigned char s_paddr[4]; /* physical address, aliased s_nlib */ | |
57 | unsigned char s_vaddr[4]; /* virtual address */ | |
58 | unsigned char s_size[4]; /* section size */ | |
59 | unsigned char s_scnptr[4]; /* file ptr to raw data for section */ | |
60 | unsigned char s_relptr[4]; /* file ptr to relocation */ | |
61 | unsigned char s_lnnoptr[4]; /* file ptr to line numbers */ | |
62 | unsigned char s_nreloc[2]; /* number of relocation entries */ | |
63 | unsigned char s_nlnno[2]; /* number of line number entries*/ | |
64 | unsigned char s_flags[4]; /* flags */ | |
65 | }; | |
66 | ||
67 | #define SCNHDR struct external_scnhdr | |
68 | #define SCNHSZ 40 | |
69 | ||
70 | /********************** RELOCATION DIRECTIVES **********************/ | |
71 | ||
72 | struct external_reloc { | |
73 | unsigned char r_vaddr[4]; | |
74 | unsigned char r_bits[4]; | |
75 | }; | |
76 | ||
77 | #define RELOC struct external_reloc | |
78 | #define RELSZ 8 | |
79 | ||
80 | /* MIPS ECOFF uses a packed 8 byte format for relocs. These constants | |
81 | are used to unpack the r_bits field. */ | |
82 | ||
83 | #define RELOC_BITS0_SYMNDX_SH_LEFT_BIG 16 | |
84 | #define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE 0 | |
85 | ||
86 | #define RELOC_BITS1_SYMNDX_SH_LEFT_BIG 8 | |
87 | #define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE 8 | |
88 | ||
89 | #define RELOC_BITS2_SYMNDX_SH_LEFT_BIG 0 | |
90 | #define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE 16 | |
91 | ||
92 | /* Originally, ECOFF used four bits for the reloc type and had three | |
93 | reserved bits. Irix 4 added another bit for the reloc type, which | |
94 | was easy because it was big endian and one of the spare bits became | |
95 | the new most significant bit. To make this also work for little | |
96 | endian ECOFF, we need to wrap one of the reserved bits around to | |
97 | become the most significant bit of the reloc type. */ | |
98 | #define RELOC_BITS3_TYPE_BIG 0x3E | |
99 | #define RELOC_BITS3_TYPE_SH_BIG 1 | |
100 | #define RELOC_BITS3_TYPE_LITTLE 0x78 | |
101 | #define RELOC_BITS3_TYPE_SH_LITTLE 3 | |
102 | #define RELOC_BITS3_TYPEHI_LITTLE 0x04 | |
103 | #define RELOC_BITS3_TYPEHI_SH_LITTLE 2 | |
104 | ||
105 | #define RELOC_BITS3_EXTERN_BIG 0x01 | |
106 | #define RELOC_BITS3_EXTERN_LITTLE 0x80 | |
107 | ||
108 | /* The r_type field in a reloc is one of the following values. I | |
109 | don't know if any other values can appear. These seem to be all | |
110 | that occur in the Ultrix 4.2 libraries. */ | |
111 | #define MIPS_R_IGNORE 0 | |
112 | #define MIPS_R_REFHALF 1 | |
113 | #define MIPS_R_REFWORD 2 | |
114 | #define MIPS_R_JMPADDR 3 | |
115 | #define MIPS_R_REFHI 4 | |
116 | #define MIPS_R_REFLO 5 | |
117 | #define MIPS_R_GPREL 6 | |
118 | #define MIPS_R_LITERAL 7 | |
119 | ||
120 | /* These reloc types are a Cygnus extension used when generating | |
121 | position independent code for embedded systems. The numbers are | |
122 | taken from Irix 4, but at least for internal relocs Irix 5 does not | |
123 | give them the same meaning. For an internal reloc the symbol index | |
124 | of RELHI and RELLO is modified as described below for | |
125 | MIPS_R_SWITCH. */ | |
126 | #define MIPS_R_PCREL16 12 | |
127 | #define MIPS_R_RELHI 13 | |
128 | #define MIPS_R_RELLO 14 | |
129 | ||
130 | /* This reloc type is a Cygnus extension used when generating position | |
131 | independent code for embedded systems. It is used for an entry in | |
132 | a switch table, which looks like this: | |
133 | .word $L3-$LS12 | |
134 | The object file will contain the correct difference, and does not | |
135 | require adjustment. However, when the linker is relaxing PC | |
136 | relative calls, it is possible for $L3 to move farther away. This | |
137 | reloc always appears in the .text section, and is always against | |
138 | the .text section. However, the symbol index is not | |
139 | RELOC_SECTION_TEXT. It is, instead, the distance between this | |
140 | switch table entry and $LS12. Thus, the original value of $L12 is | |
141 | vaddr - symndx | |
142 | and the original value of $L3 is | |
143 | vaddr - symndx + addend | |
144 | where addend is the value in the object file. Knowing this, the | |
145 | linker can know whether the addend in the object file must be | |
146 | adjusted. */ | |
147 | #define MIPS_R_SWITCH 22 | |
148 | ||
149 | /********************** STABS **********************/ | |
150 | ||
151 | #define MIPS_IS_STAB ECOFF_IS_STAB | |
152 | #define MIPS_MARK_STAB ECOFF_MARK_STAB | |
153 | #define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB | |
154 | ||
155 | /********************** SYMBOLIC INFORMATION **********************/ | |
156 | ||
157 | /* Written by John Gilmore. */ | |
158 | ||
159 | /* ECOFF uses COFF-like section structures, but its own symbol format. | |
160 | This file defines the symbol format in fields whose size and alignment | |
161 | will not vary on different host systems. */ | |
162 | ||
163 | /* File header as a set of bytes */ | |
164 | ||
165 | struct hdr_ext { | |
166 | unsigned char h_magic[2]; | |
167 | unsigned char h_vstamp[2]; | |
168 | unsigned char h_ilineMax[4]; | |
169 | unsigned char h_cbLine[4]; | |
170 | unsigned char h_cbLineOffset[4]; | |
171 | unsigned char h_idnMax[4]; | |
172 | unsigned char h_cbDnOffset[4]; | |
173 | unsigned char h_ipdMax[4]; | |
174 | unsigned char h_cbPdOffset[4]; | |
175 | unsigned char h_isymMax[4]; | |
176 | unsigned char h_cbSymOffset[4]; | |
177 | unsigned char h_ioptMax[4]; | |
178 | unsigned char h_cbOptOffset[4]; | |
179 | unsigned char h_iauxMax[4]; | |
180 | unsigned char h_cbAuxOffset[4]; | |
181 | unsigned char h_issMax[4]; | |
182 | unsigned char h_cbSsOffset[4]; | |
183 | unsigned char h_issExtMax[4]; | |
184 | unsigned char h_cbSsExtOffset[4]; | |
185 | unsigned char h_ifdMax[4]; | |
186 | unsigned char h_cbFdOffset[4]; | |
187 | unsigned char h_crfd[4]; | |
188 | unsigned char h_cbRfdOffset[4]; | |
189 | unsigned char h_iextMax[4]; | |
190 | unsigned char h_cbExtOffset[4]; | |
191 | }; | |
192 | ||
193 | /* File descriptor external record */ | |
194 | ||
195 | struct fdr_ext { | |
196 | unsigned char f_adr[4]; | |
197 | unsigned char f_rss[4]; | |
198 | unsigned char f_issBase[4]; | |
199 | unsigned char f_cbSs[4]; | |
200 | unsigned char f_isymBase[4]; | |
201 | unsigned char f_csym[4]; | |
202 | unsigned char f_ilineBase[4]; | |
203 | unsigned char f_cline[4]; | |
204 | unsigned char f_ioptBase[4]; | |
205 | unsigned char f_copt[4]; | |
206 | unsigned char f_ipdFirst[2]; | |
207 | unsigned char f_cpd[2]; | |
208 | unsigned char f_iauxBase[4]; | |
209 | unsigned char f_caux[4]; | |
210 | unsigned char f_rfdBase[4]; | |
211 | unsigned char f_crfd[4]; | |
212 | unsigned char f_bits1[1]; | |
213 | unsigned char f_bits2[3]; | |
214 | unsigned char f_cbLineOffset[4]; | |
215 | unsigned char f_cbLine[4]; | |
216 | }; | |
217 | ||
218 | #define FDR_BITS1_LANG_BIG 0xF8 | |
219 | #define FDR_BITS1_LANG_SH_BIG 3 | |
220 | #define FDR_BITS1_LANG_LITTLE 0x1F | |
221 | #define FDR_BITS1_LANG_SH_LITTLE 0 | |
222 | ||
223 | #define FDR_BITS1_FMERGE_BIG 0x04 | |
224 | #define FDR_BITS1_FMERGE_LITTLE 0x20 | |
225 | ||
226 | #define FDR_BITS1_FREADIN_BIG 0x02 | |
227 | #define FDR_BITS1_FREADIN_LITTLE 0x40 | |
228 | ||
229 | #define FDR_BITS1_FBIGENDIAN_BIG 0x01 | |
230 | #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80 | |
231 | ||
232 | #define FDR_BITS2_GLEVEL_BIG 0xC0 | |
233 | #define FDR_BITS2_GLEVEL_SH_BIG 6 | |
234 | #define FDR_BITS2_GLEVEL_LITTLE 0x03 | |
235 | #define FDR_BITS2_GLEVEL_SH_LITTLE 0 | |
236 | ||
237 | /* We ignore the `reserved' field in bits2. */ | |
238 | ||
239 | /* Procedure descriptor external record */ | |
240 | ||
241 | struct pdr_ext { | |
242 | unsigned char p_adr[4]; | |
243 | unsigned char p_isym[4]; | |
244 | unsigned char p_iline[4]; | |
245 | unsigned char p_regmask[4]; | |
246 | unsigned char p_regoffset[4]; | |
247 | unsigned char p_iopt[4]; | |
248 | unsigned char p_fregmask[4]; | |
249 | unsigned char p_fregoffset[4]; | |
250 | unsigned char p_frameoffset[4]; | |
251 | unsigned char p_framereg[2]; | |
252 | unsigned char p_pcreg[2]; | |
253 | unsigned char p_lnLow[4]; | |
254 | unsigned char p_lnHigh[4]; | |
255 | unsigned char p_cbLineOffset[4]; | |
256 | }; | |
257 | ||
258 | /* Runtime procedure table */ | |
259 | ||
260 | struct rpdr_ext { | |
261 | unsigned char p_adr[4]; | |
262 | unsigned char p_regmask[4]; | |
263 | unsigned char p_regoffset[4]; | |
264 | unsigned char p_fregmask[4]; | |
265 | unsigned char p_fregoffset[4]; | |
266 | unsigned char p_frameoffset[4]; | |
267 | unsigned char p_framereg[2]; | |
268 | unsigned char p_pcreg[2]; | |
269 | unsigned char p_irpss[4]; | |
270 | unsigned char p_reserved[4]; | |
271 | unsigned char p_exception_info[4]; | |
272 | }; | |
273 | ||
274 | /* Line numbers */ | |
275 | ||
276 | struct line_ext { | |
277 | unsigned char l_line[4]; | |
278 | }; | |
279 | ||
280 | /* Symbol external record */ | |
281 | ||
282 | struct sym_ext { | |
283 | unsigned char s_iss[4]; | |
284 | unsigned char s_value[4]; | |
285 | unsigned char s_bits1[1]; | |
286 | unsigned char s_bits2[1]; | |
287 | unsigned char s_bits3[1]; | |
288 | unsigned char s_bits4[1]; | |
289 | }; | |
290 | ||
291 | #define SYM_BITS1_ST_BIG 0xFC | |
292 | #define SYM_BITS1_ST_SH_BIG 2 | |
293 | #define SYM_BITS1_ST_LITTLE 0x3F | |
294 | #define SYM_BITS1_ST_SH_LITTLE 0 | |
295 | ||
296 | #define SYM_BITS1_SC_BIG 0x03 | |
297 | #define SYM_BITS1_SC_SH_LEFT_BIG 3 | |
298 | #define SYM_BITS1_SC_LITTLE 0xC0 | |
299 | #define SYM_BITS1_SC_SH_LITTLE 6 | |
300 | ||
301 | #define SYM_BITS2_SC_BIG 0xE0 | |
302 | #define SYM_BITS2_SC_SH_BIG 5 | |
303 | #define SYM_BITS2_SC_LITTLE 0x07 | |
304 | #define SYM_BITS2_SC_SH_LEFT_LITTLE 2 | |
305 | ||
306 | #define SYM_BITS2_RESERVED_BIG 0x10 | |
307 | #define SYM_BITS2_RESERVED_LITTLE 0x08 | |
308 | ||
309 | #define SYM_BITS2_INDEX_BIG 0x0F | |
310 | #define SYM_BITS2_INDEX_SH_LEFT_BIG 16 | |
311 | #define SYM_BITS2_INDEX_LITTLE 0xF0 | |
312 | #define SYM_BITS2_INDEX_SH_LITTLE 4 | |
313 | ||
314 | #define SYM_BITS3_INDEX_SH_LEFT_BIG 8 | |
315 | #define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4 | |
316 | ||
317 | #define SYM_BITS4_INDEX_SH_LEFT_BIG 0 | |
318 | #define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12 | |
319 | ||
320 | /* External symbol external record */ | |
321 | ||
322 | struct ext_ext { | |
323 | unsigned char es_bits1[1]; | |
324 | unsigned char es_bits2[1]; | |
325 | unsigned char es_ifd[2]; | |
326 | struct sym_ext es_asym; | |
327 | }; | |
328 | ||
329 | #define EXT_BITS1_JMPTBL_BIG 0x80 | |
330 | #define EXT_BITS1_JMPTBL_LITTLE 0x01 | |
331 | ||
332 | #define EXT_BITS1_COBOL_MAIN_BIG 0x40 | |
333 | #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02 | |
334 | ||
335 | #define EXT_BITS1_WEAKEXT_BIG 0x20 | |
336 | #define EXT_BITS1_WEAKEXT_LITTLE 0x04 | |
337 | ||
338 | /* Dense numbers external record */ | |
339 | ||
340 | struct dnr_ext { | |
341 | unsigned char d_rfd[4]; | |
342 | unsigned char d_index[4]; | |
343 | }; | |
344 | ||
345 | /* Relative file descriptor */ | |
346 | ||
347 | struct rfd_ext { | |
348 | unsigned char rfd[4]; | |
349 | }; | |
350 | ||
351 | /* Optimizer symbol external record */ | |
352 | ||
353 | struct opt_ext { | |
354 | unsigned char o_bits1[1]; | |
355 | unsigned char o_bits2[1]; | |
356 | unsigned char o_bits3[1]; | |
357 | unsigned char o_bits4[1]; | |
358 | struct rndx_ext o_rndx; | |
359 | unsigned char o_offset[4]; | |
360 | }; | |
361 | ||
362 | #define OPT_BITS2_VALUE_SH_LEFT_BIG 16 | |
363 | #define OPT_BITS2_VALUE_SH_LEFT_LITTLE 0 | |
364 | ||
365 | #define OPT_BITS3_VALUE_SH_LEFT_BIG 8 | |
366 | #define OPT_BITS3_VALUE_SH_LEFT_LITTLE 8 | |
367 | ||
368 | #define OPT_BITS4_VALUE_SH_LEFT_BIG 0 | |
369 | #define OPT_BITS4_VALUE_SH_LEFT_LITTLE 16 |