Commit | Line | Data |
---|---|---|
252b5132 RH |
1 | #ifndef ECOFF_H |
2 | #define ECOFF_H | |
3 | ||
4 | /* Generic ECOFF support. | |
5 | This does not include symbol information, found in sym.h and | |
6 | symconst.h. */ | |
7 | ||
8 | /* Mips magic numbers used in filehdr. MIPS_MAGIC_LITTLE is used on | |
9 | little endian machines. MIPS_MAGIC_BIG is used on big endian | |
10 | machines. Where is MIPS_MAGIC_1 from? */ | |
11 | #define MIPS_MAGIC_1 0x0180 | |
12 | #define MIPS_MAGIC_LITTLE 0x0162 | |
13 | #define MIPS_MAGIC_BIG 0x0160 | |
14 | ||
15 | /* These are the magic numbers used for MIPS code compiled at ISA | |
16 | level 2. */ | |
17 | #define MIPS_MAGIC_LITTLE2 0x0166 | |
18 | #define MIPS_MAGIC_BIG2 0x0163 | |
19 | ||
20 | /* These are the magic numbers used for MIPS code compiled at ISA | |
21 | level 3. */ | |
22 | #define MIPS_MAGIC_LITTLE3 0x142 | |
23 | #define MIPS_MAGIC_BIG3 0x140 | |
24 | ||
25 | /* Alpha magic numbers used in filehdr. */ | |
26 | #define ALPHA_MAGIC 0x183 | |
27 | #define ALPHA_MAGIC_BSD 0x185 | |
28 | ||
29 | /* Magic numbers used in a.out header. */ | |
30 | #define ECOFF_AOUT_OMAGIC 0407 /* not demand paged (ld -N). */ | |
31 | #define ECOFF_AOUT_ZMAGIC 0413 /* demand load format, eg normal ld output */ | |
32 | ||
33 | /* Names of special sections. */ | |
34 | #define _TEXT ".text" | |
35 | #define _DATA ".data" | |
36 | #define _BSS ".bss" | |
37 | #define _RDATA ".rdata" | |
38 | #define _SDATA ".sdata" | |
39 | #define _SBSS ".sbss" | |
40 | #define _LITA ".lita" | |
41 | #define _LIT4 ".lit4" | |
42 | #define _LIT8 ".lit8" | |
43 | #define _LIB ".lib" | |
44 | #define _INIT ".init" | |
45 | #define _FINI ".fini" | |
46 | #define _PDATA ".pdata" | |
47 | #define _XDATA ".xdata" | |
48 | #define _GOT ".got" | |
49 | #define _HASH ".hash" | |
50 | #define _DYNSYM ".dynsym" | |
51 | #define _DYNSTR ".dynstr" | |
52 | #define _RELDYN ".rel.dyn" | |
53 | #define _CONFLIC ".conflic" | |
54 | #define _COMMENT ".comment" | |
55 | #define _LIBLIST ".liblist" | |
56 | #define _DYNAMIC ".dynamic" | |
57 | #define _RCONST ".rconst" | |
58 | ||
59 | /* ECOFF uses some additional section flags. */ | |
60 | #define STYP_RDATA 0x100 | |
61 | #define STYP_SDATA 0x200 | |
62 | #define STYP_SBSS 0x400 | |
63 | #define STYP_GOT 0x1000 | |
64 | #define STYP_DYNAMIC 0x2000 | |
65 | #define STYP_DYNSYM 0x4000 | |
66 | #define STYP_RELDYN 0x8000 | |
67 | #define STYP_DYNSTR 0x10000 | |
68 | #define STYP_HASH 0x20000 | |
69 | #define STYP_LIBLIST 0x40000 | |
70 | #define STYP_CONFLIC 0x100000 | |
71 | #define STYP_ECOFF_FINI 0x1000000 | |
72 | #define STYP_EXTENDESC 0x2000000 /* 0x02FFF000 bits => scn type, rest clr */ | |
73 | #define STYP_LITA 0x4000000 | |
74 | #define STYP_LIT8 0x8000000 | |
75 | #define STYP_LIT4 0x10000000 | |
76 | #define STYP_ECOFF_LIB 0x40000000 | |
77 | #define STYP_ECOFF_INIT 0x80000000 | |
78 | #define STYP_OTHER_LOAD (STYP_ECOFF_INIT | STYP_ECOFF_FINI) | |
79 | ||
80 | /* extended section types */ | |
81 | #define STYP_COMMENT 0x2100000 | |
82 | #define STYP_RCONST 0x2200000 | |
83 | #define STYP_XDATA 0x2400000 | |
84 | #define STYP_PDATA 0x2800000 | |
85 | ||
86 | /* The linker needs a section to hold small common variables while | |
87 | linking. There is no convenient way to create it when the linker | |
88 | needs it, so we always create one for each BFD. We then avoid | |
89 | writing it out. */ | |
90 | #define SCOMMON ".scommon" | |
91 | ||
92 | /* If the extern bit in a reloc is 1, then r_symndx is an index into | |
93 | the external symbol table. If the extern bit is 0, then r_symndx | |
94 | indicates a section, and is one of the following values. */ | |
95 | #define RELOC_SECTION_NONE 0 | |
96 | #define RELOC_SECTION_TEXT 1 | |
97 | #define RELOC_SECTION_RDATA 2 | |
98 | #define RELOC_SECTION_DATA 3 | |
99 | #define RELOC_SECTION_SDATA 4 | |
100 | #define RELOC_SECTION_SBSS 5 | |
101 | #define RELOC_SECTION_BSS 6 | |
102 | #define RELOC_SECTION_INIT 7 | |
103 | #define RELOC_SECTION_LIT8 8 | |
104 | #define RELOC_SECTION_LIT4 9 | |
105 | #define RELOC_SECTION_XDATA 10 | |
106 | #define RELOC_SECTION_PDATA 11 | |
107 | #define RELOC_SECTION_FINI 12 | |
108 | #define RELOC_SECTION_LITA 13 | |
109 | #define RELOC_SECTION_ABS 14 | |
110 | #define RELOC_SECTION_RCONST 15 | |
111 | ||
112 | #define NUM_RELOC_SECTIONS 16 | |
113 | ||
114 | /********************** STABS **********************/ | |
115 | ||
116 | /* gcc uses mips-tfile to output type information in special stabs | |
117 | entries. These must match the corresponding definition in | |
118 | gcc/config/mips.h. At some point, these should probably go into a | |
119 | shared include file, but currently gcc and gdb do not share any | |
120 | directories. */ | |
121 | #define CODE_MASK 0x8F300 | |
122 | #define ECOFF_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK) | |
123 | #define ECOFF_MARK_STAB(code) ((code)+CODE_MASK) | |
124 | #define ECOFF_UNMARK_STAB(code) ((code)-CODE_MASK) | |
125 | #define STABS_SYMBOL "@stabs" | |
126 | ||
127 | /********************** COFF **********************/ | |
128 | ||
129 | /* gcc also uses mips-tfile to output COFF debugging information. | |
130 | These are the values it uses when outputting the .type directive. | |
131 | These should also be in a shared include file. */ | |
132 | #define N_BTMASK (017) | |
133 | #define N_TMASK (060) | |
134 | #define N_BTSHFT (4) | |
135 | #define N_TSHIFT (2) | |
136 | ||
137 | /********************** AUX **********************/ | |
138 | ||
139 | /* The auxiliary type information is the same on all known ECOFF | |
140 | targets. I can't see any reason that it would ever change, so I am | |
141 | going to gamble and define the external structures here, in the | |
142 | target independent ECOFF header file. The internal forms are | |
143 | defined in coff/sym.h, which was originally donated by MIPS | |
144 | Computer Systems. */ | |
145 | ||
146 | /* Type information external record */ | |
147 | ||
148 | struct tir_ext { | |
149 | unsigned char t_bits1[1]; | |
150 | unsigned char t_tq45[1]; | |
151 | unsigned char t_tq01[1]; | |
152 | unsigned char t_tq23[1]; | |
153 | }; | |
154 | ||
155 | #define TIR_BITS1_FBITFIELD_BIG ((unsigned int) 0x80) | |
156 | #define TIR_BITS1_FBITFIELD_LITTLE ((unsigned int) 0x01) | |
157 | ||
158 | #define TIR_BITS1_CONTINUED_BIG ((unsigned int) 0x40) | |
159 | #define TIR_BITS1_CONTINUED_LITTLE ((unsigned int) 0x02) | |
160 | ||
161 | #define TIR_BITS1_BT_BIG ((unsigned int) 0x3F) | |
162 | #define TIR_BITS1_BT_SH_BIG 0 | |
163 | #define TIR_BITS1_BT_LITTLE ((unsigned int) 0xFC) | |
164 | #define TIR_BITS1_BT_SH_LITTLE 2 | |
165 | ||
166 | #define TIR_BITS_TQ4_BIG ((unsigned int) 0xF0) | |
167 | #define TIR_BITS_TQ4_SH_BIG 4 | |
168 | #define TIR_BITS_TQ5_BIG ((unsigned int) 0x0F) | |
169 | #define TIR_BITS_TQ5_SH_BIG 0 | |
170 | #define TIR_BITS_TQ4_LITTLE ((unsigned int) 0x0F) | |
171 | #define TIR_BITS_TQ4_SH_LITTLE 0 | |
172 | #define TIR_BITS_TQ5_LITTLE ((unsigned int) 0xF0) | |
173 | #define TIR_BITS_TQ5_SH_LITTLE 4 | |
174 | ||
175 | #define TIR_BITS_TQ0_BIG ((unsigned int) 0xF0) | |
176 | #define TIR_BITS_TQ0_SH_BIG 4 | |
177 | #define TIR_BITS_TQ1_BIG ((unsigned int) 0x0F) | |
178 | #define TIR_BITS_TQ1_SH_BIG 0 | |
179 | #define TIR_BITS_TQ0_LITTLE ((unsigned int) 0x0F) | |
180 | #define TIR_BITS_TQ0_SH_LITTLE 0 | |
181 | #define TIR_BITS_TQ1_LITTLE ((unsigned int) 0xF0) | |
182 | #define TIR_BITS_TQ1_SH_LITTLE 4 | |
183 | ||
184 | #define TIR_BITS_TQ2_BIG ((unsigned int) 0xF0) | |
185 | #define TIR_BITS_TQ2_SH_BIG 4 | |
186 | #define TIR_BITS_TQ3_BIG ((unsigned int) 0x0F) | |
187 | #define TIR_BITS_TQ3_SH_BIG 0 | |
188 | #define TIR_BITS_TQ2_LITTLE ((unsigned int) 0x0F) | |
189 | #define TIR_BITS_TQ2_SH_LITTLE 0 | |
190 | #define TIR_BITS_TQ3_LITTLE ((unsigned int) 0xF0) | |
191 | #define TIR_BITS_TQ3_SH_LITTLE 4 | |
192 | ||
193 | /* Relative symbol external record */ | |
194 | ||
195 | struct rndx_ext { | |
196 | unsigned char r_bits[4]; | |
197 | }; | |
198 | ||
199 | #define RNDX_BITS0_RFD_SH_LEFT_BIG 4 | |
200 | #define RNDX_BITS1_RFD_BIG ((unsigned int) 0xF0) | |
201 | #define RNDX_BITS1_RFD_SH_BIG 4 | |
202 | ||
203 | #define RNDX_BITS0_RFD_SH_LEFT_LITTLE 0 | |
204 | #define RNDX_BITS1_RFD_LITTLE ((unsigned int) 0x0F) | |
205 | #define RNDX_BITS1_RFD_SH_LEFT_LITTLE 8 | |
206 | ||
207 | #define RNDX_BITS1_INDEX_BIG ((unsigned int) 0x0F) | |
208 | #define RNDX_BITS1_INDEX_SH_LEFT_BIG 16 | |
209 | #define RNDX_BITS2_INDEX_SH_LEFT_BIG 8 | |
210 | #define RNDX_BITS3_INDEX_SH_LEFT_BIG 0 | |
211 | ||
212 | #define RNDX_BITS1_INDEX_LITTLE ((unsigned int) 0xF0) | |
213 | #define RNDX_BITS1_INDEX_SH_LITTLE 4 | |
214 | #define RNDX_BITS2_INDEX_SH_LEFT_LITTLE 4 | |
215 | #define RNDX_BITS3_INDEX_SH_LEFT_LITTLE 12 | |
216 | ||
217 | /* Auxiliary symbol information external record */ | |
218 | ||
219 | union aux_ext { | |
220 | struct tir_ext a_ti; | |
221 | struct rndx_ext a_rndx; | |
222 | unsigned char a_dnLow[4]; | |
223 | unsigned char a_dnHigh[4]; | |
224 | unsigned char a_isym[4]; | |
225 | unsigned char a_iss[4]; | |
226 | unsigned char a_width[4]; | |
227 | unsigned char a_count[4]; | |
228 | }; | |
229 | ||
230 | #define AUX_GET_ANY(bigend, ax, field) \ | |
231 | ((bigend) ? bfd_getb32 ((ax)->field) : bfd_getl32 ((ax)->field)) | |
232 | ||
233 | #define AUX_GET_DNLOW(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_dnLow) | |
234 | #define AUX_GET_DNHIGH(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_dnHigh) | |
235 | #define AUX_GET_ISYM(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_isym) | |
236 | #define AUX_GET_ISS(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_iss) | |
237 | #define AUX_GET_WIDTH(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_width) | |
238 | #define AUX_GET_COUNT(bigend, ax) AUX_GET_ANY ((bigend), (ax), a_count) | |
239 | ||
240 | #define AUX_PUT_ANY(bigend, val, ax, field) \ | |
241 | ((bigend) \ | |
242 | ? (bfd_putb32 ((bfd_vma) (val), (ax)->field), 0) \ | |
243 | : (bfd_putl32 ((bfd_vma) (val), (ax)->field), 0)) | |
244 | ||
245 | #define AUX_PUT_DNLOW(bigend, val, ax) \ | |
246 | AUX_PUT_ANY ((bigend), (val), (ax), a_dnLow) | |
247 | #define AUX_PUT_DNHIGH(bigend, val, ax) \ | |
248 | AUX_PUT_ANY ((bigend), (val), (ax), a_dnHigh) | |
249 | #define AUX_PUT_ISYM(bigend, val, ax) \ | |
250 | AUX_PUT_ANY ((bigend), (val), (ax), a_isym) | |
251 | #define AUX_PUT_ISS(bigend, val, ax) \ | |
252 | AUX_PUT_ANY ((bigend), (val), (ax), a_iss) | |
253 | #define AUX_PUT_WIDTH(bigend, val, ax) \ | |
254 | AUX_PUT_ANY ((bigend), (val), (ax), a_width) | |
255 | #define AUX_PUT_COUNT(bigend, val, ax) \ | |
256 | AUX_PUT_ANY ((bigend), (val), (ax), a_count) | |
257 | ||
258 | /********************** SYMBOLS **********************/ | |
259 | ||
260 | /* For efficiency, gdb deals directly with the unswapped symbolic | |
261 | information (that way it only takes the time to swap information | |
262 | that it really needs to read). gdb originally retrieved the | |
263 | information directly from the BFD backend information, but that | |
264 | strategy, besides being sort of ugly, does not work for MIPS ELF, | |
265 | which also uses ECOFF debugging information. This structure holds | |
266 | pointers to the (mostly) unswapped symbolic information. */ | |
267 | ||
268 | struct ecoff_debug_info | |
269 | { | |
270 | /* The swapped ECOFF symbolic header. */ | |
271 | HDRR symbolic_header; | |
272 | ||
273 | /* Pointers to the unswapped symbolic information. Note that the | |
274 | pointers to external structures point to different sorts of | |
275 | information on different ECOFF targets. The ecoff_debug_swap | |
276 | structure provides the sizes of the structures and the functions | |
277 | needed to swap the information in and out. These pointers are | |
278 | all pointers to arrays, not single structures. They will be NULL | |
279 | if there are no instances of the relevant structure. These | |
280 | fields are also used by the assembler to output ECOFF debugging | |
281 | information. */ | |
282 | unsigned char *line; | |
283 | PTR external_dnr; /* struct dnr_ext */ | |
284 | PTR external_pdr; /* struct pdr_ext */ | |
285 | PTR external_sym; /* struct sym_ext */ | |
286 | PTR external_opt; /* struct opt_ext */ | |
287 | union aux_ext *external_aux; | |
288 | char *ss; | |
289 | char *ssext; | |
290 | PTR external_fdr; /* struct fdr_ext */ | |
291 | PTR external_rfd; /* struct rfd_ext */ | |
292 | PTR external_ext; /* struct ext_ext */ | |
293 | ||
294 | /* These fields are used when linking. They may disappear at some | |
295 | point. */ | |
296 | char *ssext_end; | |
297 | PTR external_ext_end; | |
298 | ||
299 | /* When linking, this field holds a mapping from the input FDR | |
300 | numbers to the output numbers, and is used when writing out the | |
301 | external symbols. It is NULL if no mapping is required. */ | |
302 | RFDT *ifdmap; | |
303 | ||
304 | /* The swapped FDR information. Currently this is never NULL, but | |
305 | code using this structure should probably double-check in case | |
306 | this changes in the future. This is a pointer to an array, not a | |
307 | single structure. */ | |
308 | FDR *fdr; | |
309 | ||
310 | /* When relaxing MIPS embedded PIC code, we may need to adjust | |
311 | symbol values when they are output. This is a linked list of | |
312 | structures indicating how values should be adjusted. There is no | |
313 | requirement that the entries be in any order, or that they not | |
314 | overlap. This field is normally NULL, in which case no | |
315 | adjustments need to be made. */ | |
316 | struct ecoff_value_adjust *adjust; | |
317 | }; | |
318 | ||
319 | /* This structure describes how to adjust symbol values when | |
320 | outputting MIPS embedded PIC code. These adjustments only apply to | |
321 | the internal symbols, as the external symbol values will come from | |
322 | the hash table and have already been adjusted. */ | |
323 | ||
324 | struct ecoff_value_adjust | |
325 | { | |
326 | /* Next entry on adjustment list. */ | |
327 | struct ecoff_value_adjust *next; | |
328 | /* Starting VMA of adjustment. This is the VMA in the ECOFF file, | |
329 | not the offset from the start of the section. Thus it should | |
330 | indicate a particular section. */ | |
331 | bfd_vma start; | |
332 | /* Ending VMA of adjustment. */ | |
333 | bfd_vma end; | |
334 | /* Adjustment. This should be added to the value of the symbol, or | |
335 | FDR. This is zero for the last entry in the array. */ | |
336 | long adjust; | |
337 | }; | |
338 | ||
339 | /* These structures are used by the ECOFF find_nearest_line function. */ | |
340 | ||
341 | struct ecoff_fdrtab_entry | |
342 | { | |
343 | /* Base address in .text of this FDR. */ | |
344 | bfd_vma base_addr; | |
345 | FDR *fdr; | |
346 | }; | |
347 | ||
348 | struct ecoff_find_line | |
349 | { | |
350 | /* Allocated memory to hold function and file names. */ | |
351 | char *find_buffer; | |
352 | ||
353 | /* FDR table, sorted by address: */ | |
354 | long fdrtab_len; | |
355 | struct ecoff_fdrtab_entry *fdrtab; | |
356 | ||
357 | /* Cache entry for most recently found line information. The sect | |
358 | field is NULL if this cache does not contain valid information. */ | |
359 | struct | |
360 | { | |
361 | asection *sect; | |
362 | bfd_vma start; | |
363 | bfd_vma stop; | |
364 | const char *filename; | |
365 | const char *functionname; | |
366 | unsigned int line_num; | |
367 | } cache; | |
368 | }; | |
369 | ||
370 | /********************** SWAPPING **********************/ | |
371 | ||
372 | /* The generic ECOFF code needs to be able to swap debugging | |
373 | information in and out in the specific format used by a particular | |
374 | ECOFF implementation. This structure provides the information | |
375 | needed to do this. */ | |
376 | ||
377 | struct ecoff_debug_swap | |
378 | { | |
379 | /* Symbol table magic number. */ | |
380 | int sym_magic; | |
381 | /* Alignment of debugging information. E.g., 4. */ | |
382 | bfd_size_type debug_align; | |
383 | /* Sizes of external symbolic information. */ | |
384 | bfd_size_type external_hdr_size; | |
385 | bfd_size_type external_dnr_size; | |
386 | bfd_size_type external_pdr_size; | |
387 | bfd_size_type external_sym_size; | |
388 | bfd_size_type external_opt_size; | |
389 | bfd_size_type external_fdr_size; | |
390 | bfd_size_type external_rfd_size; | |
391 | bfd_size_type external_ext_size; | |
392 | /* Functions to swap in external symbolic data. */ | |
393 | void (*swap_hdr_in) PARAMS ((bfd *, PTR, HDRR *)); | |
394 | void (*swap_dnr_in) PARAMS ((bfd *, PTR, DNR *)); | |
395 | void (*swap_pdr_in) PARAMS ((bfd *, PTR, PDR *)); | |
396 | void (*swap_sym_in) PARAMS ((bfd *, PTR, SYMR *)); | |
397 | void (*swap_opt_in) PARAMS ((bfd *, PTR, OPTR *)); | |
398 | void (*swap_fdr_in) PARAMS ((bfd *, PTR, FDR *)); | |
399 | void (*swap_rfd_in) PARAMS ((bfd *, PTR, RFDT *)); | |
400 | void (*swap_ext_in) PARAMS ((bfd *, PTR, EXTR *)); | |
401 | void (*swap_tir_in) PARAMS ((int, const struct tir_ext *, TIR *)); | |
402 | void (*swap_rndx_in) PARAMS ((int, const struct rndx_ext *, RNDXR *)); | |
403 | /* Functions to swap out external symbolic data. */ | |
404 | void (*swap_hdr_out) PARAMS ((bfd *, const HDRR *, PTR)); | |
405 | void (*swap_dnr_out) PARAMS ((bfd *, const DNR *, PTR)); | |
406 | void (*swap_pdr_out) PARAMS ((bfd *, const PDR *, PTR)); | |
407 | void (*swap_sym_out) PARAMS ((bfd *, const SYMR *, PTR)); | |
408 | void (*swap_opt_out) PARAMS ((bfd *, const OPTR *, PTR)); | |
409 | void (*swap_fdr_out) PARAMS ((bfd *, const FDR *, PTR)); | |
410 | void (*swap_rfd_out) PARAMS ((bfd *, const RFDT *, PTR)); | |
411 | void (*swap_ext_out) PARAMS ((bfd *, const EXTR *, PTR)); | |
412 | void (*swap_tir_out) PARAMS ((int, const TIR *, struct tir_ext *)); | |
413 | void (*swap_rndx_out) PARAMS ((int, const RNDXR *, struct rndx_ext *)); | |
414 | /* Function to read symbol data and set up pointers in | |
415 | ecoff_debug_info structure. The section argument is used for | |
416 | ELF, not straight ECOFF. */ | |
417 | boolean (*read_debug_info) PARAMS ((bfd *, asection *, | |
418 | struct ecoff_debug_info *)); | |
419 | }; | |
420 | ||
421 | #endif /* ! defined (ECOFF_H) */ |