Commit | Line | Data |
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f268681b ILT |
1 | /* ECOFF support on MIPS machines. |
2 | coff/ecoff.h must be included before this file. */ | |
57115f09 ILT |
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 | ||
f268681b ILT |
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)) | |
57115f09 ILT |
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 */ | |
a434bccf ILT |
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 */ | |
57115f09 ILT |
45 | } AOUTHDR; |
46 | ||
47 | /* compute size of a header */ | |
48 | ||
49 | #define AOUTSZ (sizeof(AOUTHDR)) | |
50 | ||
57115f09 ILT |
51 | /********************** SECTION HEADER **********************/ |
52 | ||
53 | struct external_scnhdr { | |
54 | unsigned char s_name[8]; /* section name */ | |
55 | unsigned char s_paddr[4]; /* physical address, aliased s_nlib */ | |
56 | unsigned char s_vaddr[4]; /* virtual address */ | |
57 | unsigned char s_size[4]; /* section size */ | |
58 | unsigned char s_scnptr[4]; /* file ptr to raw data for section */ | |
59 | unsigned char s_relptr[4]; /* file ptr to relocation */ | |
60 | unsigned char s_lnnoptr[4]; /* file ptr to line numbers */ | |
61 | unsigned char s_nreloc[2]; /* number of relocation entries */ | |
62 | unsigned char s_nlnno[2]; /* number of line number entries*/ | |
63 | unsigned char s_flags[4]; /* flags */ | |
64 | }; | |
65 | ||
66 | #define SCNHDR struct external_scnhdr | |
67 | #define SCNHSZ sizeof(SCNHDR) | |
68 | ||
57115f09 ILT |
69 | /********************** RELOCATION DIRECTIVES **********************/ |
70 | ||
71 | struct external_reloc { | |
72 | unsigned char r_vaddr[4]; | |
9dcfbb67 | 73 | unsigned char r_bits[4]; |
57115f09 ILT |
74 | }; |
75 | ||
a434bccf ILT |
76 | #define RELOC struct external_reloc |
77 | #define RELSZ 8 | |
78 | ||
9dcfbb67 | 79 | /* MIPS ECOFF uses a packed 8 byte format for relocs. These constants |
a434bccf | 80 | are used to unpack the r_bits field. */ |
9dcfbb67 ILT |
81 | |
82 | #define RELOC_BITS0_SYMNDX_SH_LEFT_BIG 16 | |
83 | #define RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE 0 | |
84 | ||
85 | #define RELOC_BITS1_SYMNDX_SH_LEFT_BIG 8 | |
86 | #define RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE 8 | |
87 | ||
88 | #define RELOC_BITS2_SYMNDX_SH_LEFT_BIG 0 | |
89 | #define RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE 16 | |
90 | ||
a434bccf ILT |
91 | #define RELOC_BITS3_TYPE_BIG 0x1E |
92 | #define RELOC_BITS3_TYPE_SH_BIG 1 | |
9dcfbb67 ILT |
93 | #define RELOC_BITS3_TYPE_LITTLE 0x78 |
94 | #define RELOC_BITS3_TYPE_SH_LITTLE 3 | |
95 | ||
96 | #define RELOC_BITS3_EXTERN_BIG 0x01 | |
97 | #define RELOC_BITS3_EXTERN_LITTLE 0x80 | |
98 | ||
f268681b ILT |
99 | /* The r_type field in a reloc is one of the following values. I |
100 | don't know if any other values can appear. These seem to be all | |
101 | that occur in the Ultrix 4.2 libraries. */ | |
102 | #define MIPS_R_IGNORE 0 | |
103 | #define MIPS_R_REFHALF 1 | |
104 | #define MIPS_R_REFWORD 2 | |
105 | #define MIPS_R_JMPADDR 3 | |
106 | #define MIPS_R_REFHI 4 | |
107 | #define MIPS_R_REFLO 5 | |
108 | #define MIPS_R_GPREL 6 | |
109 | #define MIPS_R_LITERAL 7 | |
110 | ||
111 | /* This reloc type is a Cygnus extension used when generating position | |
112 | independent code for embedded systems. */ | |
113 | #define MIPS_R_PCREL16 8 | |
114 | ||
115 | /* This reloc type is a Cygnus extension used when generating position | |
116 | independent code for embedded systems. It is used for an entry in | |
117 | a switch table, which looks like this: | |
118 | .switch $L3-$LS12 | |
119 | The object file will contain the correct difference, and does not | |
120 | require adjustment. However, when the linker is relaxing PC | |
121 | relative calls, it is possible for $L3 to move farther away. This | |
122 | reloc always appears in the .text section, and is always against | |
123 | the .text section. However, the symbol index is not | |
124 | RELOC_SECTION_TEXT. It is, instead, the distance between this | |
125 | switch table entry and $LS12. Thus, the original value of $L12 is | |
126 | vaddr - symndx | |
127 | and the original value of $L3 is | |
128 | vaddr - symndx + addend | |
129 | where addend is the value in the object file. Knowing this, the | |
130 | linker can know whether the addend in the object file must be | |
131 | adjusted. */ | |
132 | #define MIPS_R_SWITCH 9 | |
a434bccf ILT |
133 | |
134 | /********************** STABS **********************/ | |
57115f09 | 135 | |
f268681b ILT |
136 | #define MIPS_IS_STAB ECOFF_IS_STAB |
137 | #define MIPS_MARK_STAB ECOFF_MARK_STAB | |
138 | #define MIPS_UNMARK_STAB ECOFF_UNMARK_STAB | |
139 | ||
140 | #define DEFAULT_DATA_SECTION_ALIGNMENT 4 | |
141 | #define DEFAULT_BSS_SECTION_ALIGNMENT 4 | |
142 | #define DEFAULT_TEXT_SECTION_ALIGNMENT 16 | |
143 | /* For new sections we havn't heard of before */ | |
144 | #define DEFAULT_SECTION_ALIGNMENT 4 | |
145 | ||
146 | /********************** SYMBOLIC INFORMATION **********************/ | |
147 | ||
148 | /* Written by John Gilmore. */ | |
149 | ||
150 | /* ECOFF uses COFF-like section structures, but its own symbol format. | |
151 | This file defines the symbol format in fields whose size and alignment | |
152 | will not vary on different host systems. */ | |
153 | ||
154 | /* File header as a set of bytes */ | |
155 | ||
156 | struct hdr_ext { | |
157 | unsigned char h_magic[2]; | |
158 | unsigned char h_vstamp[2]; | |
159 | unsigned char h_ilineMax[4]; | |
160 | unsigned char h_cbLine[4]; | |
161 | unsigned char h_cbLineOffset[4]; | |
162 | unsigned char h_idnMax[4]; | |
163 | unsigned char h_cbDnOffset[4]; | |
164 | unsigned char h_ipdMax[4]; | |
165 | unsigned char h_cbPdOffset[4]; | |
166 | unsigned char h_isymMax[4]; | |
167 | unsigned char h_cbSymOffset[4]; | |
168 | unsigned char h_ioptMax[4]; | |
169 | unsigned char h_cbOptOffset[4]; | |
170 | unsigned char h_iauxMax[4]; | |
171 | unsigned char h_cbAuxOffset[4]; | |
172 | unsigned char h_issMax[4]; | |
173 | unsigned char h_cbSsOffset[4]; | |
174 | unsigned char h_issExtMax[4]; | |
175 | unsigned char h_cbSsExtOffset[4]; | |
176 | unsigned char h_ifdMax[4]; | |
177 | unsigned char h_cbFdOffset[4]; | |
178 | unsigned char h_crfd[4]; | |
179 | unsigned char h_cbRfdOffset[4]; | |
180 | unsigned char h_iextMax[4]; | |
181 | unsigned char h_cbExtOffset[4]; | |
182 | }; | |
183 | ||
184 | /* File descriptor external record */ | |
185 | ||
186 | struct fdr_ext { | |
187 | unsigned char f_adr[4]; | |
188 | unsigned char f_rss[4]; | |
189 | unsigned char f_issBase[4]; | |
190 | unsigned char f_cbSs[4]; | |
191 | unsigned char f_isymBase[4]; | |
192 | unsigned char f_csym[4]; | |
193 | unsigned char f_ilineBase[4]; | |
194 | unsigned char f_cline[4]; | |
195 | unsigned char f_ioptBase[4]; | |
196 | unsigned char f_copt[4]; | |
197 | unsigned char f_ipdFirst[2]; | |
198 | unsigned char f_cpd[2]; | |
199 | unsigned char f_iauxBase[4]; | |
200 | unsigned char f_caux[4]; | |
201 | unsigned char f_rfdBase[4]; | |
202 | unsigned char f_crfd[4]; | |
203 | unsigned char f_bits1[1]; | |
204 | unsigned char f_bits2[3]; | |
205 | unsigned char f_cbLineOffset[4]; | |
206 | unsigned char f_cbLine[4]; | |
207 | }; | |
208 | ||
209 | #define FDR_BITS1_LANG_BIG 0xF8 | |
210 | #define FDR_BITS1_LANG_SH_BIG 3 | |
211 | #define FDR_BITS1_LANG_LITTLE 0x1F | |
212 | #define FDR_BITS1_LANG_SH_LITTLE 0 | |
213 | ||
214 | #define FDR_BITS1_FMERGE_BIG 0x04 | |
215 | #define FDR_BITS1_FMERGE_LITTLE 0x20 | |
216 | ||
217 | #define FDR_BITS1_FREADIN_BIG 0x02 | |
218 | #define FDR_BITS1_FREADIN_LITTLE 0x40 | |
219 | ||
220 | #define FDR_BITS1_FBIGENDIAN_BIG 0x01 | |
221 | #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80 | |
222 | ||
223 | #define FDR_BITS2_GLEVEL_BIG 0xC0 | |
224 | #define FDR_BITS2_GLEVEL_SH_BIG 6 | |
225 | #define FDR_BITS2_GLEVEL_LITTLE 0x03 | |
226 | #define FDR_BITS2_GLEVEL_SH_LITTLE 0 | |
227 | ||
228 | /* We ignore the `reserved' field in bits2. */ | |
229 | ||
230 | /* Procedure descriptor external record */ | |
231 | ||
232 | struct pdr_ext { | |
233 | unsigned char p_adr[4]; | |
234 | unsigned char p_isym[4]; | |
235 | unsigned char p_iline[4]; | |
236 | unsigned char p_regmask[4]; | |
237 | unsigned char p_regoffset[4]; | |
238 | unsigned char p_iopt[4]; | |
239 | unsigned char p_fregmask[4]; | |
240 | unsigned char p_fregoffset[4]; | |
241 | unsigned char p_frameoffset[4]; | |
242 | unsigned char p_framereg[2]; | |
243 | unsigned char p_pcreg[2]; | |
244 | unsigned char p_lnLow[4]; | |
245 | unsigned char p_lnHigh[4]; | |
246 | unsigned char p_cbLineOffset[4]; | |
247 | }; | |
248 | ||
249 | /* Line numbers */ | |
250 | ||
251 | struct line_ext { | |
252 | unsigned char l_line[4]; | |
253 | }; | |
254 | ||
255 | /* Symbol external record */ | |
256 | ||
257 | struct sym_ext { | |
258 | unsigned char s_iss[4]; | |
259 | unsigned char s_value[4]; | |
260 | unsigned char s_bits1[1]; | |
261 | unsigned char s_bits2[1]; | |
262 | unsigned char s_bits3[1]; | |
263 | unsigned char s_bits4[1]; | |
264 | }; | |
265 | ||
266 | #define SYM_BITS1_ST_BIG 0xFC | |
267 | #define SYM_BITS1_ST_SH_BIG 2 | |
268 | #define SYM_BITS1_ST_LITTLE 0x3F | |
269 | #define SYM_BITS1_ST_SH_LITTLE 0 | |
270 | ||
271 | #define SYM_BITS1_SC_BIG 0x03 | |
272 | #define SYM_BITS1_SC_SH_LEFT_BIG 3 | |
273 | #define SYM_BITS1_SC_LITTLE 0xC0 | |
274 | #define SYM_BITS1_SC_SH_LITTLE 6 | |
275 | ||
276 | #define SYM_BITS2_SC_BIG 0xE0 | |
277 | #define SYM_BITS2_SC_SH_BIG 5 | |
278 | #define SYM_BITS2_SC_LITTLE 0x07 | |
279 | #define SYM_BITS2_SC_SH_LEFT_LITTLE 2 | |
280 | ||
281 | #define SYM_BITS2_RESERVED_BIG 0x10 | |
282 | #define SYM_BITS2_RESERVED_LITTLE 0x08 | |
283 | ||
284 | #define SYM_BITS2_INDEX_BIG 0x0F | |
285 | #define SYM_BITS2_INDEX_SH_LEFT_BIG 16 | |
286 | #define SYM_BITS2_INDEX_LITTLE 0xF0 | |
287 | #define SYM_BITS2_INDEX_SH_LITTLE 4 | |
288 | ||
289 | #define SYM_BITS3_INDEX_SH_LEFT_BIG 8 | |
290 | #define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4 | |
291 | ||
292 | #define SYM_BITS4_INDEX_SH_LEFT_BIG 0 | |
293 | #define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12 | |
294 | ||
295 | /* External symbol external record */ | |
296 | ||
297 | struct ext_ext { | |
298 | unsigned char es_bits1[1]; | |
299 | unsigned char es_bits2[1]; | |
300 | unsigned char es_ifd[2]; | |
301 | struct sym_ext es_asym; | |
302 | }; | |
303 | ||
304 | #define EXT_BITS1_JMPTBL_BIG 0x80 | |
305 | #define EXT_BITS1_JMPTBL_LITTLE 0x01 | |
306 | ||
307 | #define EXT_BITS1_COBOL_MAIN_BIG 0x40 | |
308 | #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02 | |
309 | ||
310 | #define EXT_BITS1_WEAKEXT_BIG 0x20 | |
311 | #define EXT_BITS1_WEAKEXT_LITTLE 0x04 | |
312 | ||
313 | /* Dense numbers external record */ | |
314 | ||
315 | struct dnr_ext { | |
316 | unsigned char d_rfd[4]; | |
317 | unsigned char d_index[4]; | |
318 | }; | |
319 | ||
320 | /* Relative file descriptor */ | |
321 | ||
322 | struct rfd_ext { | |
323 | unsigned char rfd[4]; | |
324 | }; | |
325 | ||
326 | /* Optimizer symbol external record */ | |
327 | ||
328 | struct opt_ext { | |
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 |