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252b5132 RH |
1 | /* Generic ECOFF support. |
2 | This does not include symbol information, found in sym.h and | |
4f1d9bd8 NC |
3 | symconst.h. |
4 | ||
2571583a | 5 | Copyright (C) 2001-2017 Free Software Foundation, Inc. |
4f1d9bd8 NC |
6 | |
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
e4e42b45 | 9 | the Free Software Foundation; either version 3 of the License, or |
4f1d9bd8 | 10 | (at your option) any later version. |
b34976b6 | 11 | |
4f1d9bd8 NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
b34976b6 | 16 | |
4f1d9bd8 NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
e4e42b45 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
b34976b6 | 21 | |
4f1d9bd8 NC |
22 | #ifndef ECOFF_H |
23 | #define ECOFF_H | |
252b5132 RH |
24 | |
25 | /* Mips magic numbers used in filehdr. MIPS_MAGIC_LITTLE is used on | |
26 | little endian machines. MIPS_MAGIC_BIG is used on big endian | |
27 | machines. Where is MIPS_MAGIC_1 from? */ | |
28 | #define MIPS_MAGIC_1 0x0180 | |
29 | #define MIPS_MAGIC_LITTLE 0x0162 | |
30 | #define MIPS_MAGIC_BIG 0x0160 | |
31 | ||
32 | /* These are the magic numbers used for MIPS code compiled at ISA | |
33 | level 2. */ | |
34 | #define MIPS_MAGIC_LITTLE2 0x0166 | |
35 | #define MIPS_MAGIC_BIG2 0x0163 | |
36 | ||
37 | /* These are the magic numbers used for MIPS code compiled at ISA | |
38 | level 3. */ | |
39 | #define MIPS_MAGIC_LITTLE3 0x142 | |
40 | #define MIPS_MAGIC_BIG3 0x140 | |
41 | ||
42 | /* Alpha magic numbers used in filehdr. */ | |
43 | #define ALPHA_MAGIC 0x183 | |
44 | #define ALPHA_MAGIC_BSD 0x185 | |
15ac1d4f NC |
45 | /* A compressed version of an ALPHA_MAGIC file created by DEC's tools. */ |
46 | #define ALPHA_MAGIC_COMPRESSED 0x188 | |
252b5132 RH |
47 | |
48 | /* Magic numbers used in a.out header. */ | |
49 | #define ECOFF_AOUT_OMAGIC 0407 /* not demand paged (ld -N). */ | |
50 | #define ECOFF_AOUT_ZMAGIC 0413 /* demand load format, eg normal ld output */ | |
51 | ||
52 | /* Names of special sections. */ | |
53 | #define _TEXT ".text" | |
54 | #define _DATA ".data" | |
55 | #define _BSS ".bss" | |
56 | #define _RDATA ".rdata" | |
57 | #define _SDATA ".sdata" | |
58 | #define _SBSS ".sbss" | |
59 | #define _LITA ".lita" | |
60 | #define _LIT4 ".lit4" | |
61 | #define _LIT8 ".lit8" | |
62 | #define _LIB ".lib" | |
63 | #define _INIT ".init" | |
64 | #define _FINI ".fini" | |
65 | #define _PDATA ".pdata" | |
66 | #define _XDATA ".xdata" | |
67 | #define _GOT ".got" | |
68 | #define _HASH ".hash" | |
69 | #define _DYNSYM ".dynsym" | |
70 | #define _DYNSTR ".dynstr" | |
71 | #define _RELDYN ".rel.dyn" | |
72 | #define _CONFLIC ".conflic" | |
73 | #define _COMMENT ".comment" | |
74 | #define _LIBLIST ".liblist" | |
75 | #define _DYNAMIC ".dynamic" | |
76 | #define _RCONST ".rconst" | |
77 | ||
78 | /* ECOFF uses some additional section flags. */ | |
79 | #define STYP_RDATA 0x100 | |
80 | #define STYP_SDATA 0x200 | |
81 | #define STYP_SBSS 0x400 | |
82 | #define STYP_GOT 0x1000 | |
83 | #define STYP_DYNAMIC 0x2000 | |
84 | #define STYP_DYNSYM 0x4000 | |
85 | #define STYP_RELDYN 0x8000 | |
86 | #define STYP_DYNSTR 0x10000 | |
87 | #define STYP_HASH 0x20000 | |
88 | #define STYP_LIBLIST 0x40000 | |
89 | #define STYP_CONFLIC 0x100000 | |
90 | #define STYP_ECOFF_FINI 0x1000000 | |
91 | #define STYP_EXTENDESC 0x2000000 /* 0x02FFF000 bits => scn type, rest clr */ | |
92 | #define STYP_LITA 0x4000000 | |
93 | #define STYP_LIT8 0x8000000 | |
94 | #define STYP_LIT4 0x10000000 | |
95 | #define STYP_ECOFF_LIB 0x40000000 | |
96 | #define STYP_ECOFF_INIT 0x80000000 | |
97 | #define STYP_OTHER_LOAD (STYP_ECOFF_INIT | STYP_ECOFF_FINI) | |
98 | ||
99 | /* extended section types */ | |
100 | #define STYP_COMMENT 0x2100000 | |
101 | #define STYP_RCONST 0x2200000 | |
102 | #define STYP_XDATA 0x2400000 | |
103 | #define STYP_PDATA 0x2800000 | |
104 | ||
105 | /* The linker needs a section to hold small common variables while | |
106 | linking. There is no convenient way to create it when the linker | |
107 | needs it, so we always create one for each BFD. We then avoid | |
108 | writing it out. */ | |
109 | #define SCOMMON ".scommon" | |
110 | ||
111 | /* If the extern bit in a reloc is 1, then r_symndx is an index into | |
112 | the external symbol table. If the extern bit is 0, then r_symndx | |
113 | indicates a section, and is one of the following values. */ | |
114 | #define RELOC_SECTION_NONE 0 | |
115 | #define RELOC_SECTION_TEXT 1 | |
116 | #define RELOC_SECTION_RDATA 2 | |
117 | #define RELOC_SECTION_DATA 3 | |
118 | #define RELOC_SECTION_SDATA 4 | |
119 | #define RELOC_SECTION_SBSS 5 | |
120 | #define RELOC_SECTION_BSS 6 | |
121 | #define RELOC_SECTION_INIT 7 | |
122 | #define RELOC_SECTION_LIT8 8 | |
123 | #define RELOC_SECTION_LIT4 9 | |
124 | #define RELOC_SECTION_XDATA 10 | |
125 | #define RELOC_SECTION_PDATA 11 | |
126 | #define RELOC_SECTION_FINI 12 | |
127 | #define RELOC_SECTION_LITA 13 | |
128 | #define RELOC_SECTION_ABS 14 | |
129 | #define RELOC_SECTION_RCONST 15 | |
130 | ||
131 | #define NUM_RELOC_SECTIONS 16 | |
132 | ||
133 | /********************** STABS **********************/ | |
134 | ||
135 | /* gcc uses mips-tfile to output type information in special stabs | |
136 | entries. These must match the corresponding definition in | |
137 | gcc/config/mips.h. At some point, these should probably go into a | |
138 | shared include file, but currently gcc and gdb do not share any | |
139 | directories. */ | |
140 | #define CODE_MASK 0x8F300 | |
141 | #define ECOFF_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK) | |
142 | #define ECOFF_MARK_STAB(code) ((code)+CODE_MASK) | |
143 | #define ECOFF_UNMARK_STAB(code) ((code)-CODE_MASK) | |
144 | #define STABS_SYMBOL "@stabs" | |
145 | ||
146 | /********************** COFF **********************/ | |
147 | ||
148 | /* gcc also uses mips-tfile to output COFF debugging information. | |
149 | These are the values it uses when outputting the .type directive. | |
150 | These should also be in a shared include file. */ | |
151 | #define N_BTMASK (017) | |
152 | #define N_TMASK (060) | |
153 | #define N_BTSHFT (4) | |
154 | #define N_TSHIFT (2) | |
155 | ||
156 | /********************** AUX **********************/ | |
157 | ||
158 | /* The auxiliary type information is the same on all known ECOFF | |
159 | targets. I can't see any reason that it would ever change, so I am | |
160 | going to gamble and define the external structures here, in the | |
161 | target independent ECOFF header file. The internal forms are | |
162 | defined in coff/sym.h, which was originally donated by MIPS | |
163 | Computer Systems. */ | |
164 | ||
165 | /* Type information external record */ | |
166 | ||
167 | struct tir_ext { | |
168 | unsigned char t_bits1[1]; | |
169 | unsigned char t_tq45[1]; | |
170 | unsigned char t_tq01[1]; | |
171 | unsigned char t_tq23[1]; | |
172 | }; | |
173 | ||
174 | #define TIR_BITS1_FBITFIELD_BIG ((unsigned int) 0x80) | |
175 | #define TIR_BITS1_FBITFIELD_LITTLE ((unsigned int) 0x01) | |
176 | ||
177 | #define TIR_BITS1_CONTINUED_BIG ((unsigned int) 0x40) | |
178 | #define TIR_BITS1_CONTINUED_LITTLE ((unsigned int) 0x02) | |
179 | ||
180 | #define TIR_BITS1_BT_BIG ((unsigned int) 0x3F) | |
181 | #define TIR_BITS1_BT_SH_BIG 0 | |
182 | #define TIR_BITS1_BT_LITTLE ((unsigned int) 0xFC) | |
183 | #define TIR_BITS1_BT_SH_LITTLE 2 | |
184 | ||
185 | #define TIR_BITS_TQ4_BIG ((unsigned int) 0xF0) | |
186 | #define TIR_BITS_TQ4_SH_BIG 4 | |
187 | #define TIR_BITS_TQ5_BIG ((unsigned int) 0x0F) | |
188 | #define TIR_BITS_TQ5_SH_BIG 0 | |
189 | #define TIR_BITS_TQ4_LITTLE ((unsigned int) 0x0F) | |
190 | #define TIR_BITS_TQ4_SH_LITTLE 0 | |
191 | #define TIR_BITS_TQ5_LITTLE ((unsigned int) 0xF0) | |
192 | #define TIR_BITS_TQ5_SH_LITTLE 4 | |
193 | ||
194 | #define TIR_BITS_TQ0_BIG ((unsigned int) 0xF0) | |
195 | #define TIR_BITS_TQ0_SH_BIG 4 | |
196 | #define TIR_BITS_TQ1_BIG ((unsigned int) 0x0F) | |
197 | #define TIR_BITS_TQ1_SH_BIG 0 | |
198 | #define TIR_BITS_TQ0_LITTLE ((unsigned int) 0x0F) | |
199 | #define TIR_BITS_TQ0_SH_LITTLE 0 | |
200 | #define TIR_BITS_TQ1_LITTLE ((unsigned int) 0xF0) | |
201 | #define TIR_BITS_TQ1_SH_LITTLE 4 | |
202 | ||
203 | #define TIR_BITS_TQ2_BIG ((unsigned int) 0xF0) | |
204 | #define TIR_BITS_TQ2_SH_BIG 4 | |
205 | #define TIR_BITS_TQ3_BIG ((unsigned int) 0x0F) | |
206 | #define TIR_BITS_TQ3_SH_BIG 0 | |
207 | #define TIR_BITS_TQ2_LITTLE ((unsigned int) 0x0F) | |
208 | #define TIR_BITS_TQ2_SH_LITTLE 0 | |
209 | #define TIR_BITS_TQ3_LITTLE ((unsigned int) 0xF0) | |
210 | #define TIR_BITS_TQ3_SH_LITTLE 4 | |
211 | ||
212 | /* Relative symbol external record */ | |
213 | ||
214 | struct rndx_ext { | |
215 | unsigned char r_bits[4]; | |
216 | }; | |
217 | ||
218 | #define RNDX_BITS0_RFD_SH_LEFT_BIG 4 | |
219 | #define RNDX_BITS1_RFD_BIG ((unsigned int) 0xF0) | |
220 | #define RNDX_BITS1_RFD_SH_BIG 4 | |
221 | ||
222 | #define RNDX_BITS0_RFD_SH_LEFT_LITTLE 0 | |
223 | #define RNDX_BITS1_RFD_LITTLE ((unsigned int) 0x0F) | |
224 | #define RNDX_BITS1_RFD_SH_LEFT_LITTLE 8 | |
225 | ||
226 | #define RNDX_BITS1_INDEX_BIG ((unsigned int) 0x0F) | |
227 | #define RNDX_BITS1_INDEX_SH_LEFT_BIG 16 | |
228 | #define RNDX_BITS2_INDEX_SH_LEFT_BIG 8 | |
229 | #define RNDX_BITS3_INDEX_SH_LEFT_BIG 0 | |
230 | ||
231 | #define RNDX_BITS1_INDEX_LITTLE ((unsigned int) 0xF0) | |
232 | #define RNDX_BITS1_INDEX_SH_LITTLE 4 | |
233 | #define RNDX_BITS2_INDEX_SH_LEFT_LITTLE 4 | |
234 | #define RNDX_BITS3_INDEX_SH_LEFT_LITTLE 12 | |
235 | ||
236 | /* Auxiliary symbol information external record */ | |
237 | ||
238 | union aux_ext { | |
239 | struct tir_ext a_ti; | |
240 | struct rndx_ext a_rndx; | |
241 | unsigned char a_dnLow[4]; | |
242 | unsigned char a_dnHigh[4]; | |
243 | unsigned char a_isym[4]; | |
244 | unsigned char a_iss[4]; | |
245 | unsigned char a_width[4]; | |
246 | unsigned char a_count[4]; | |
247 | }; | |
248 | ||
249 | #define AUX_GET_ANY(bigend, ax, field) \ | |
250 | ((bigend) ? bfd_getb32 ((ax)->field) : bfd_getl32 ((ax)->field)) | |
251 | ||
252 | #define AUX_GET_DNLOW(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_dnLow) | |
253 | #define AUX_GET_DNHIGH(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_dnHigh) | |
254 | #define AUX_GET_ISYM(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_isym) | |
255 | #define AUX_GET_ISS(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_iss) | |
256 | #define AUX_GET_WIDTH(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_width) | |
257 | #define AUX_GET_COUNT(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_count) | |
258 | ||
259 | #define AUX_PUT_ANY(bigend, val, ax, field) \ | |
260 | ((bigend) \ | |
261 | ? (bfd_putb32 ((bfd_vma) (val), (ax)->field), 0) \ | |
262 | : (bfd_putl32 ((bfd_vma) (val), (ax)->field), 0)) | |
263 | ||
264 | #define AUX_PUT_DNLOW(bigend, val, ax) \ | |
265 | AUX_PUT_ANY ((bigend), (val), (ax), a_dnLow) | |
266 | #define AUX_PUT_DNHIGH(bigend, val, ax) \ | |
267 | AUX_PUT_ANY ((bigend), (val), (ax), a_dnHigh) | |
268 | #define AUX_PUT_ISYM(bigend, val, ax) \ | |
269 | AUX_PUT_ANY ((bigend), (val), (ax), a_isym) | |
270 | #define AUX_PUT_ISS(bigend, val, ax) \ | |
271 | AUX_PUT_ANY ((bigend), (val), (ax), a_iss) | |
272 | #define AUX_PUT_WIDTH(bigend, val, ax) \ | |
273 | AUX_PUT_ANY ((bigend), (val), (ax), a_width) | |
274 | #define AUX_PUT_COUNT(bigend, val, ax) \ | |
275 | AUX_PUT_ANY ((bigend), (val), (ax), a_count) | |
276 | ||
277 | /********************** SYMBOLS **********************/ | |
278 | ||
279 | /* For efficiency, gdb deals directly with the unswapped symbolic | |
280 | information (that way it only takes the time to swap information | |
281 | that it really needs to read). gdb originally retrieved the | |
282 | information directly from the BFD backend information, but that | |
283 | strategy, besides being sort of ugly, does not work for MIPS ELF, | |
284 | which also uses ECOFF debugging information. This structure holds | |
285 | pointers to the (mostly) unswapped symbolic information. */ | |
286 | ||
287 | struct ecoff_debug_info | |
288 | { | |
289 | /* The swapped ECOFF symbolic header. */ | |
290 | HDRR symbolic_header; | |
291 | ||
292 | /* Pointers to the unswapped symbolic information. Note that the | |
293 | pointers to external structures point to different sorts of | |
294 | information on different ECOFF targets. The ecoff_debug_swap | |
295 | structure provides the sizes of the structures and the functions | |
296 | needed to swap the information in and out. These pointers are | |
297 | all pointers to arrays, not single structures. They will be NULL | |
298 | if there are no instances of the relevant structure. These | |
299 | fields are also used by the assembler to output ECOFF debugging | |
300 | information. */ | |
301 | unsigned char *line; | |
a6f5b2c3 AJ |
302 | void *external_dnr; /* struct dnr_ext */ |
303 | void *external_pdr; /* struct pdr_ext */ | |
304 | void *external_sym; /* struct sym_ext */ | |
305 | void *external_opt; /* struct opt_ext */ | |
252b5132 RH |
306 | union aux_ext *external_aux; |
307 | char *ss; | |
308 | char *ssext; | |
a6f5b2c3 AJ |
309 | void *external_fdr; /* struct fdr_ext */ |
310 | void *external_rfd; /* struct rfd_ext */ | |
311 | void *external_ext; /* struct ext_ext */ | |
252b5132 RH |
312 | |
313 | /* These fields are used when linking. They may disappear at some | |
314 | point. */ | |
315 | char *ssext_end; | |
a6f5b2c3 | 316 | void *external_ext_end; |
252b5132 RH |
317 | |
318 | /* When linking, this field holds a mapping from the input FDR | |
319 | numbers to the output numbers, and is used when writing out the | |
320 | external symbols. It is NULL if no mapping is required. */ | |
321 | RFDT *ifdmap; | |
322 | ||
323 | /* The swapped FDR information. Currently this is never NULL, but | |
324 | code using this structure should probably double-check in case | |
325 | this changes in the future. This is a pointer to an array, not a | |
326 | single structure. */ | |
327 | FDR *fdr; | |
252b5132 RH |
328 | }; |
329 | ||
330 | /* These structures are used by the ECOFF find_nearest_line function. */ | |
331 | ||
332 | struct ecoff_fdrtab_entry | |
333 | { | |
334 | /* Base address in .text of this FDR. */ | |
335 | bfd_vma base_addr; | |
336 | FDR *fdr; | |
337 | }; | |
338 | ||
339 | struct ecoff_find_line | |
340 | { | |
341 | /* Allocated memory to hold function and file names. */ | |
342 | char *find_buffer; | |
343 | ||
344 | /* FDR table, sorted by address: */ | |
345 | long fdrtab_len; | |
346 | struct ecoff_fdrtab_entry *fdrtab; | |
347 | ||
348 | /* Cache entry for most recently found line information. The sect | |
349 | field is NULL if this cache does not contain valid information. */ | |
350 | struct | |
351 | { | |
352 | asection *sect; | |
353 | bfd_vma start; | |
354 | bfd_vma stop; | |
355 | const char *filename; | |
356 | const char *functionname; | |
357 | unsigned int line_num; | |
358 | } cache; | |
359 | }; | |
360 | ||
361 | /********************** SWAPPING **********************/ | |
362 | ||
363 | /* The generic ECOFF code needs to be able to swap debugging | |
364 | information in and out in the specific format used by a particular | |
365 | ECOFF implementation. This structure provides the information | |
366 | needed to do this. */ | |
367 | ||
368 | struct ecoff_debug_swap | |
369 | { | |
370 | /* Symbol table magic number. */ | |
371 | int sym_magic; | |
372 | /* Alignment of debugging information. E.g., 4. */ | |
373 | bfd_size_type debug_align; | |
374 | /* Sizes of external symbolic information. */ | |
375 | bfd_size_type external_hdr_size; | |
376 | bfd_size_type external_dnr_size; | |
377 | bfd_size_type external_pdr_size; | |
378 | bfd_size_type external_sym_size; | |
379 | bfd_size_type external_opt_size; | |
380 | bfd_size_type external_fdr_size; | |
381 | bfd_size_type external_rfd_size; | |
382 | bfd_size_type external_ext_size; | |
383 | /* Functions to swap in external symbolic data. */ | |
a6f5b2c3 AJ |
384 | void (*swap_hdr_in) (bfd *, void *, HDRR *); |
385 | void (*swap_dnr_in) (bfd *, void *, DNR *); | |
386 | void (*swap_pdr_in) (bfd *, void *, PDR *); | |
387 | void (*swap_sym_in) (bfd *, void *, SYMR *); | |
388 | void (*swap_opt_in) (bfd *, void *, OPTR *); | |
389 | void (*swap_fdr_in) (bfd *, void *, FDR *); | |
390 | void (*swap_rfd_in) (bfd *, void *, RFDT *); | |
391 | void (*swap_ext_in) (bfd *, void *, EXTR *); | |
392 | void (*swap_tir_in) (int, const struct tir_ext *, TIR *); | |
393 | void (*swap_rndx_in) (int, const struct rndx_ext *, RNDXR *); | |
252b5132 | 394 | /* Functions to swap out external symbolic data. */ |
a6f5b2c3 AJ |
395 | void (*swap_hdr_out) (bfd *, const HDRR *, void *); |
396 | void (*swap_dnr_out) (bfd *, const DNR *, void *); | |
397 | void (*swap_pdr_out) (bfd *, const PDR *, void *); | |
398 | void (*swap_sym_out) (bfd *, const SYMR *, void *); | |
399 | void (*swap_opt_out) (bfd *, const OPTR *, void *); | |
400 | void (*swap_fdr_out) (bfd *, const FDR *, void *); | |
401 | void (*swap_rfd_out) (bfd *, const RFDT *, void *); | |
402 | void (*swap_ext_out) (bfd *, const EXTR *, void *); | |
403 | void (*swap_tir_out) (int, const TIR *, struct tir_ext *); | |
404 | void (*swap_rndx_out) (int, const RNDXR *, struct rndx_ext *); | |
252b5132 RH |
405 | /* Function to read symbol data and set up pointers in |
406 | ecoff_debug_info structure. The section argument is used for | |
407 | ELF, not straight ECOFF. */ | |
a6f5b2c3 | 408 | bfd_boolean (*read_debug_info) (bfd *, asection *, struct ecoff_debug_info *); |
252b5132 RH |
409 | }; |
410 | ||
411 | #endif /* ! defined (ECOFF_H) */ |