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252b5132 | 1 | /* BFD back-end for ALPHA Extended-Coff files. |
7b50b349 | 2 | Copyright 1993, 94, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. |
252b5132 RH |
3 | Modified from coff-mips.c by Steve Chamberlain <sac@cygnus.com> and |
4 | Ian Lance Taylor <ian@cygnus.com>. | |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "bfdlink.h" | |
25 | #include "libbfd.h" | |
26 | #include "coff/internal.h" | |
27 | #include "coff/sym.h" | |
28 | #include "coff/symconst.h" | |
29 | #include "coff/ecoff.h" | |
30 | #include "coff/alpha.h" | |
31 | #include "aout/ar.h" | |
32 | #include "libcoff.h" | |
33 | #include "libecoff.h" | |
34 | \f | |
35 | /* Prototypes for static functions. */ | |
36 | ||
37 | static const bfd_target *alpha_ecoff_object_p PARAMS ((bfd *)); | |
38 | static boolean alpha_ecoff_bad_format_hook PARAMS ((bfd *abfd, PTR filehdr)); | |
39 | static PTR alpha_ecoff_mkobject_hook PARAMS ((bfd *, PTR filehdr, PTR aouthdr)); | |
40 | static void alpha_ecoff_swap_reloc_in PARAMS ((bfd *, PTR, | |
41 | struct internal_reloc *)); | |
42 | static void alpha_ecoff_swap_reloc_out PARAMS ((bfd *, | |
43 | const struct internal_reloc *, | |
44 | PTR)); | |
45 | static void alpha_adjust_reloc_in PARAMS ((bfd *, | |
46 | const struct internal_reloc *, | |
47 | arelent *)); | |
48 | static void alpha_adjust_reloc_out PARAMS ((bfd *, const arelent *, | |
49 | struct internal_reloc *)); | |
50 | static reloc_howto_type *alpha_bfd_reloc_type_lookup | |
51 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
52 | static bfd_byte *alpha_ecoff_get_relocated_section_contents | |
53 | PARAMS ((bfd *abfd, struct bfd_link_info *, struct bfd_link_order *, | |
54 | bfd_byte *data, boolean relocateable, asymbol **symbols)); | |
55 | static bfd_vma alpha_convert_external_reloc | |
56 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, struct external_reloc *, | |
57 | struct ecoff_link_hash_entry *)); | |
58 | static boolean alpha_relocate_section PARAMS ((bfd *, struct bfd_link_info *, | |
59 | bfd *, asection *, | |
60 | bfd_byte *, PTR)); | |
61 | static boolean alpha_adjust_headers | |
62 | PARAMS ((bfd *, struct internal_filehdr *, struct internal_aouthdr *)); | |
63 | static PTR alpha_ecoff_read_ar_hdr PARAMS ((bfd *)); | |
64 | static bfd *alpha_ecoff_get_elt_at_filepos PARAMS ((bfd *, file_ptr)); | |
65 | static bfd *alpha_ecoff_openr_next_archived_file PARAMS ((bfd *, bfd *)); | |
66 | static bfd *alpha_ecoff_get_elt_at_index PARAMS ((bfd *, symindex)); | |
67 | \f | |
68 | /* ECOFF has COFF sections, but the debugging information is stored in | |
69 | a completely different format. ECOFF targets use some of the | |
70 | swapping routines from coffswap.h, and some of the generic COFF | |
71 | routines in coffgen.c, but, unlike the real COFF targets, do not | |
72 | use coffcode.h itself. | |
73 | ||
74 | Get the generic COFF swapping routines, except for the reloc, | |
75 | symbol, and lineno ones. Give them ecoff names. Define some | |
76 | accessor macros for the large sizes used for Alpha ECOFF. */ | |
77 | ||
78 | #define GET_FILEHDR_SYMPTR bfd_h_get_64 | |
79 | #define PUT_FILEHDR_SYMPTR bfd_h_put_64 | |
80 | #define GET_AOUTHDR_TSIZE bfd_h_get_64 | |
81 | #define PUT_AOUTHDR_TSIZE bfd_h_put_64 | |
82 | #define GET_AOUTHDR_DSIZE bfd_h_get_64 | |
83 | #define PUT_AOUTHDR_DSIZE bfd_h_put_64 | |
84 | #define GET_AOUTHDR_BSIZE bfd_h_get_64 | |
85 | #define PUT_AOUTHDR_BSIZE bfd_h_put_64 | |
86 | #define GET_AOUTHDR_ENTRY bfd_h_get_64 | |
87 | #define PUT_AOUTHDR_ENTRY bfd_h_put_64 | |
88 | #define GET_AOUTHDR_TEXT_START bfd_h_get_64 | |
89 | #define PUT_AOUTHDR_TEXT_START bfd_h_put_64 | |
90 | #define GET_AOUTHDR_DATA_START bfd_h_get_64 | |
91 | #define PUT_AOUTHDR_DATA_START bfd_h_put_64 | |
92 | #define GET_SCNHDR_PADDR bfd_h_get_64 | |
93 | #define PUT_SCNHDR_PADDR bfd_h_put_64 | |
94 | #define GET_SCNHDR_VADDR bfd_h_get_64 | |
95 | #define PUT_SCNHDR_VADDR bfd_h_put_64 | |
96 | #define GET_SCNHDR_SIZE bfd_h_get_64 | |
97 | #define PUT_SCNHDR_SIZE bfd_h_put_64 | |
98 | #define GET_SCNHDR_SCNPTR bfd_h_get_64 | |
99 | #define PUT_SCNHDR_SCNPTR bfd_h_put_64 | |
100 | #define GET_SCNHDR_RELPTR bfd_h_get_64 | |
101 | #define PUT_SCNHDR_RELPTR bfd_h_put_64 | |
102 | #define GET_SCNHDR_LNNOPTR bfd_h_get_64 | |
103 | #define PUT_SCNHDR_LNNOPTR bfd_h_put_64 | |
104 | ||
105 | #define ALPHAECOFF | |
106 | ||
107 | #define NO_COFF_RELOCS | |
108 | #define NO_COFF_SYMBOLS | |
109 | #define NO_COFF_LINENOS | |
110 | #define coff_swap_filehdr_in alpha_ecoff_swap_filehdr_in | |
111 | #define coff_swap_filehdr_out alpha_ecoff_swap_filehdr_out | |
112 | #define coff_swap_aouthdr_in alpha_ecoff_swap_aouthdr_in | |
113 | #define coff_swap_aouthdr_out alpha_ecoff_swap_aouthdr_out | |
114 | #define coff_swap_scnhdr_in alpha_ecoff_swap_scnhdr_in | |
115 | #define coff_swap_scnhdr_out alpha_ecoff_swap_scnhdr_out | |
116 | #include "coffswap.h" | |
117 | ||
118 | /* Get the ECOFF swapping routines. */ | |
119 | #define ECOFF_64 | |
120 | #include "ecoffswap.h" | |
121 | \f | |
122 | /* How to process the various reloc types. */ | |
123 | ||
124 | static bfd_reloc_status_type | |
125 | reloc_nil PARAMS ((bfd *, arelent *, asymbol *, PTR, | |
126 | asection *, bfd *, char **)); | |
127 | ||
128 | static bfd_reloc_status_type | |
129 | reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message) | |
130 | bfd *abfd; | |
131 | arelent *reloc; | |
132 | asymbol *sym; | |
133 | PTR data; | |
134 | asection *sec; | |
135 | bfd *output_bfd; | |
136 | char **error_message; | |
137 | { | |
138 | return bfd_reloc_ok; | |
139 | } | |
140 | ||
141 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
142 | from smaller values. Start with zero, widen, *then* decrement. */ | |
143 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
144 | ||
145 | static reloc_howto_type alpha_howto_table[] = | |
146 | { | |
147 | /* Reloc type 0 is ignored by itself. However, it appears after a | |
148 | GPDISP reloc to identify the location where the low order 16 bits | |
149 | of the gp register are loaded. */ | |
150 | HOWTO (ALPHA_R_IGNORE, /* type */ | |
151 | 0, /* rightshift */ | |
152 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
153 | 8, /* bitsize */ | |
154 | true, /* pc_relative */ | |
155 | 0, /* bitpos */ | |
156 | complain_overflow_dont, /* complain_on_overflow */ | |
157 | reloc_nil, /* special_function */ | |
158 | "IGNORE", /* name */ | |
159 | true, /* partial_inplace */ | |
160 | 0, /* src_mask */ | |
161 | 0, /* dst_mask */ | |
162 | true), /* pcrel_offset */ | |
163 | ||
164 | /* A 32 bit reference to a symbol. */ | |
165 | HOWTO (ALPHA_R_REFLONG, /* type */ | |
166 | 0, /* rightshift */ | |
167 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
168 | 32, /* bitsize */ | |
169 | false, /* pc_relative */ | |
170 | 0, /* bitpos */ | |
171 | complain_overflow_bitfield, /* complain_on_overflow */ | |
172 | 0, /* special_function */ | |
173 | "REFLONG", /* name */ | |
174 | true, /* partial_inplace */ | |
175 | 0xffffffff, /* src_mask */ | |
176 | 0xffffffff, /* dst_mask */ | |
177 | false), /* pcrel_offset */ | |
178 | ||
179 | /* A 64 bit reference to a symbol. */ | |
180 | HOWTO (ALPHA_R_REFQUAD, /* type */ | |
181 | 0, /* rightshift */ | |
182 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
183 | 64, /* bitsize */ | |
184 | false, /* pc_relative */ | |
185 | 0, /* bitpos */ | |
186 | complain_overflow_bitfield, /* complain_on_overflow */ | |
187 | 0, /* special_function */ | |
188 | "REFQUAD", /* name */ | |
189 | true, /* partial_inplace */ | |
190 | MINUS_ONE, /* src_mask */ | |
191 | MINUS_ONE, /* dst_mask */ | |
192 | false), /* pcrel_offset */ | |
193 | ||
194 | /* A 32 bit GP relative offset. This is just like REFLONG except | |
195 | that when the value is used the value of the gp register will be | |
196 | added in. */ | |
197 | HOWTO (ALPHA_R_GPREL32, /* type */ | |
198 | 0, /* rightshift */ | |
199 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
200 | 32, /* bitsize */ | |
201 | false, /* pc_relative */ | |
202 | 0, /* bitpos */ | |
203 | complain_overflow_bitfield, /* complain_on_overflow */ | |
204 | 0, /* special_function */ | |
205 | "GPREL32", /* name */ | |
206 | true, /* partial_inplace */ | |
207 | 0xffffffff, /* src_mask */ | |
208 | 0xffffffff, /* dst_mask */ | |
209 | false), /* pcrel_offset */ | |
210 | ||
211 | /* Used for an instruction that refers to memory off the GP | |
212 | register. The offset is 16 bits of the 32 bit instruction. This | |
213 | reloc always seems to be against the .lita section. */ | |
214 | HOWTO (ALPHA_R_LITERAL, /* type */ | |
215 | 0, /* rightshift */ | |
216 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
217 | 16, /* bitsize */ | |
218 | false, /* pc_relative */ | |
219 | 0, /* bitpos */ | |
220 | complain_overflow_signed, /* complain_on_overflow */ | |
221 | 0, /* special_function */ | |
222 | "LITERAL", /* name */ | |
223 | true, /* partial_inplace */ | |
224 | 0xffff, /* src_mask */ | |
225 | 0xffff, /* dst_mask */ | |
226 | false), /* pcrel_offset */ | |
227 | ||
228 | /* This reloc only appears immediately following a LITERAL reloc. | |
229 | It identifies a use of the literal. It seems that the linker can | |
230 | use this to eliminate a portion of the .lita section. The symbol | |
231 | index is special: 1 means the literal address is in the base | |
232 | register of a memory format instruction; 2 means the literal | |
233 | address is in the byte offset register of a byte-manipulation | |
234 | instruction; 3 means the literal address is in the target | |
235 | register of a jsr instruction. This does not actually do any | |
236 | relocation. */ | |
237 | HOWTO (ALPHA_R_LITUSE, /* type */ | |
238 | 0, /* rightshift */ | |
239 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
240 | 32, /* bitsize */ | |
241 | false, /* pc_relative */ | |
242 | 0, /* bitpos */ | |
243 | complain_overflow_dont, /* complain_on_overflow */ | |
244 | reloc_nil, /* special_function */ | |
245 | "LITUSE", /* name */ | |
246 | false, /* partial_inplace */ | |
247 | 0, /* src_mask */ | |
248 | 0, /* dst_mask */ | |
249 | false), /* pcrel_offset */ | |
250 | ||
251 | /* Load the gp register. This is always used for a ldah instruction | |
252 | which loads the upper 16 bits of the gp register. The next reloc | |
253 | will be an IGNORE reloc which identifies the location of the lda | |
254 | instruction which loads the lower 16 bits. The symbol index of | |
255 | the GPDISP instruction appears to actually be the number of bytes | |
256 | between the ldah and lda instructions. This gives two different | |
257 | ways to determine where the lda instruction is; I don't know why | |
258 | both are used. The value to use for the relocation is the | |
259 | difference between the GP value and the current location; the | |
260 | load will always be done against a register holding the current | |
261 | address. */ | |
262 | HOWTO (ALPHA_R_GPDISP, /* type */ | |
263 | 16, /* rightshift */ | |
264 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
265 | 16, /* bitsize */ | |
266 | true, /* pc_relative */ | |
267 | 0, /* bitpos */ | |
268 | complain_overflow_dont, /* complain_on_overflow */ | |
269 | reloc_nil, /* special_function */ | |
270 | "GPDISP", /* name */ | |
271 | true, /* partial_inplace */ | |
272 | 0xffff, /* src_mask */ | |
273 | 0xffff, /* dst_mask */ | |
274 | true), /* pcrel_offset */ | |
275 | ||
276 | /* A 21 bit branch. The native assembler generates these for | |
277 | branches within the text segment, and also fills in the PC | |
278 | relative offset in the instruction. */ | |
279 | HOWTO (ALPHA_R_BRADDR, /* type */ | |
280 | 2, /* rightshift */ | |
281 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
282 | 21, /* bitsize */ | |
283 | true, /* pc_relative */ | |
284 | 0, /* bitpos */ | |
285 | complain_overflow_signed, /* complain_on_overflow */ | |
286 | 0, /* special_function */ | |
287 | "BRADDR", /* name */ | |
288 | true, /* partial_inplace */ | |
289 | 0x1fffff, /* src_mask */ | |
290 | 0x1fffff, /* dst_mask */ | |
291 | false), /* pcrel_offset */ | |
292 | ||
293 | /* A hint for a jump to a register. */ | |
294 | HOWTO (ALPHA_R_HINT, /* type */ | |
295 | 2, /* rightshift */ | |
296 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
297 | 14, /* bitsize */ | |
298 | true, /* pc_relative */ | |
299 | 0, /* bitpos */ | |
300 | complain_overflow_dont, /* complain_on_overflow */ | |
301 | 0, /* special_function */ | |
302 | "HINT", /* name */ | |
303 | true, /* partial_inplace */ | |
304 | 0x3fff, /* src_mask */ | |
305 | 0x3fff, /* dst_mask */ | |
306 | false), /* pcrel_offset */ | |
307 | ||
308 | /* 16 bit PC relative offset. */ | |
309 | HOWTO (ALPHA_R_SREL16, /* type */ | |
310 | 0, /* rightshift */ | |
311 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
312 | 16, /* bitsize */ | |
313 | true, /* pc_relative */ | |
314 | 0, /* bitpos */ | |
315 | complain_overflow_signed, /* complain_on_overflow */ | |
316 | 0, /* special_function */ | |
317 | "SREL16", /* name */ | |
318 | true, /* partial_inplace */ | |
319 | 0xffff, /* src_mask */ | |
320 | 0xffff, /* dst_mask */ | |
321 | false), /* pcrel_offset */ | |
322 | ||
323 | /* 32 bit PC relative offset. */ | |
324 | HOWTO (ALPHA_R_SREL32, /* type */ | |
325 | 0, /* rightshift */ | |
326 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
327 | 32, /* bitsize */ | |
328 | true, /* pc_relative */ | |
329 | 0, /* bitpos */ | |
330 | complain_overflow_signed, /* complain_on_overflow */ | |
331 | 0, /* special_function */ | |
332 | "SREL32", /* name */ | |
333 | true, /* partial_inplace */ | |
334 | 0xffffffff, /* src_mask */ | |
335 | 0xffffffff, /* dst_mask */ | |
336 | false), /* pcrel_offset */ | |
337 | ||
338 | /* A 64 bit PC relative offset. */ | |
339 | HOWTO (ALPHA_R_SREL64, /* type */ | |
340 | 0, /* rightshift */ | |
341 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
342 | 64, /* bitsize */ | |
343 | true, /* pc_relative */ | |
344 | 0, /* bitpos */ | |
345 | complain_overflow_signed, /* complain_on_overflow */ | |
346 | 0, /* special_function */ | |
347 | "SREL64", /* name */ | |
348 | true, /* partial_inplace */ | |
349 | MINUS_ONE, /* src_mask */ | |
350 | MINUS_ONE, /* dst_mask */ | |
351 | false), /* pcrel_offset */ | |
352 | ||
353 | /* Push a value on the reloc evaluation stack. */ | |
354 | HOWTO (ALPHA_R_OP_PUSH, /* type */ | |
355 | 0, /* rightshift */ | |
356 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
357 | 0, /* bitsize */ | |
358 | false, /* pc_relative */ | |
359 | 0, /* bitpos */ | |
360 | complain_overflow_dont, /* complain_on_overflow */ | |
361 | 0, /* special_function */ | |
362 | "OP_PUSH", /* name */ | |
363 | false, /* partial_inplace */ | |
364 | 0, /* src_mask */ | |
365 | 0, /* dst_mask */ | |
366 | false), /* pcrel_offset */ | |
367 | ||
368 | /* Store the value from the stack at the given address. Store it in | |
369 | a bitfield of size r_size starting at bit position r_offset. */ | |
370 | HOWTO (ALPHA_R_OP_STORE, /* type */ | |
371 | 0, /* rightshift */ | |
372 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
373 | 64, /* bitsize */ | |
374 | false, /* pc_relative */ | |
375 | 0, /* bitpos */ | |
376 | complain_overflow_dont, /* complain_on_overflow */ | |
377 | 0, /* special_function */ | |
378 | "OP_STORE", /* name */ | |
379 | false, /* partial_inplace */ | |
380 | 0, /* src_mask */ | |
381 | MINUS_ONE, /* dst_mask */ | |
382 | false), /* pcrel_offset */ | |
383 | ||
384 | /* Subtract the reloc address from the value on the top of the | |
385 | relocation stack. */ | |
386 | HOWTO (ALPHA_R_OP_PSUB, /* type */ | |
387 | 0, /* rightshift */ | |
388 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
389 | 0, /* bitsize */ | |
390 | false, /* pc_relative */ | |
391 | 0, /* bitpos */ | |
392 | complain_overflow_dont, /* complain_on_overflow */ | |
393 | 0, /* special_function */ | |
394 | "OP_PSUB", /* name */ | |
395 | false, /* partial_inplace */ | |
396 | 0, /* src_mask */ | |
397 | 0, /* dst_mask */ | |
398 | false), /* pcrel_offset */ | |
399 | ||
400 | /* Shift the value on the top of the relocation stack right by the | |
401 | given value. */ | |
402 | HOWTO (ALPHA_R_OP_PRSHIFT, /* type */ | |
403 | 0, /* rightshift */ | |
404 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
405 | 0, /* bitsize */ | |
406 | false, /* pc_relative */ | |
407 | 0, /* bitpos */ | |
408 | complain_overflow_dont, /* complain_on_overflow */ | |
409 | 0, /* special_function */ | |
410 | "OP_PRSHIFT", /* name */ | |
411 | false, /* partial_inplace */ | |
412 | 0, /* src_mask */ | |
413 | 0, /* dst_mask */ | |
414 | false), /* pcrel_offset */ | |
415 | ||
416 | /* Adjust the GP value for a new range in the object file. */ | |
417 | HOWTO (ALPHA_R_GPVALUE, /* type */ | |
418 | 0, /* rightshift */ | |
419 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
420 | 0, /* bitsize */ | |
421 | false, /* pc_relative */ | |
422 | 0, /* bitpos */ | |
423 | complain_overflow_dont, /* complain_on_overflow */ | |
424 | 0, /* special_function */ | |
425 | "GPVALUE", /* name */ | |
426 | false, /* partial_inplace */ | |
427 | 0, /* src_mask */ | |
428 | 0, /* dst_mask */ | |
429 | false) /* pcrel_offset */ | |
430 | }; | |
431 | \f | |
432 | /* Recognize an Alpha ECOFF file. */ | |
433 | ||
434 | static const bfd_target * | |
435 | alpha_ecoff_object_p (abfd) | |
436 | bfd *abfd; | |
437 | { | |
438 | static const bfd_target *ret; | |
439 | ||
440 | ret = coff_object_p (abfd); | |
441 | ||
442 | if (ret != NULL) | |
443 | { | |
444 | asection *sec; | |
445 | ||
446 | /* Alpha ECOFF has a .pdata section. The lnnoptr field of the | |
447 | .pdata section is the number of entries it contains. Each | |
448 | entry takes up 8 bytes. The number of entries is required | |
449 | since the section is aligned to a 16 byte boundary. When we | |
450 | link .pdata sections together, we do not want to include the | |
451 | alignment bytes. We handle this on input by faking the size | |
452 | of the .pdata section to remove the unwanted alignment bytes. | |
453 | On output we will set the lnnoptr field and force the | |
454 | alignment. */ | |
455 | sec = bfd_get_section_by_name (abfd, _PDATA); | |
456 | if (sec != (asection *) NULL) | |
457 | { | |
458 | bfd_size_type size; | |
459 | ||
460 | size = sec->line_filepos * 8; | |
461 | BFD_ASSERT (size == bfd_section_size (abfd, sec) | |
462 | || size + 8 == bfd_section_size (abfd, sec)); | |
463 | if (! bfd_set_section_size (abfd, sec, size)) | |
464 | return NULL; | |
465 | } | |
466 | } | |
467 | ||
468 | return ret; | |
469 | } | |
470 | ||
471 | /* See whether the magic number matches. */ | |
472 | ||
473 | static boolean | |
474 | alpha_ecoff_bad_format_hook (abfd, filehdr) | |
475 | bfd *abfd; | |
476 | PTR filehdr; | |
477 | { | |
478 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
479 | ||
480 | if (ALPHA_ECOFF_BADMAG (*internal_f)) | |
481 | return false; | |
482 | ||
483 | return true; | |
484 | } | |
485 | ||
486 | /* This is a hook called by coff_real_object_p to create any backend | |
487 | specific information. */ | |
488 | ||
489 | static PTR | |
490 | alpha_ecoff_mkobject_hook (abfd, filehdr, aouthdr) | |
491 | bfd *abfd; | |
492 | PTR filehdr; | |
493 | PTR aouthdr; | |
494 | { | |
495 | PTR ecoff; | |
496 | ||
497 | ecoff = _bfd_ecoff_mkobject_hook (abfd, filehdr, aouthdr); | |
498 | ||
499 | if (ecoff != NULL) | |
500 | { | |
501 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
502 | ||
503 | /* Set additional BFD flags according to the object type from the | |
504 | machine specific file header flags. */ | |
505 | switch (internal_f->f_flags & F_ALPHA_OBJECT_TYPE_MASK) | |
506 | { | |
507 | case F_ALPHA_SHARABLE: | |
508 | abfd->flags |= DYNAMIC; | |
509 | break; | |
510 | case F_ALPHA_CALL_SHARED: | |
511 | /* Always executable if using shared libraries as the run time | |
512 | loader might resolve undefined references. */ | |
513 | abfd->flags |= (DYNAMIC | EXEC_P); | |
514 | break; | |
515 | } | |
516 | } | |
517 | return ecoff; | |
518 | } | |
519 | \f | |
520 | /* Reloc handling. */ | |
521 | ||
522 | /* Swap a reloc in. */ | |
523 | ||
524 | static void | |
525 | alpha_ecoff_swap_reloc_in (abfd, ext_ptr, intern) | |
526 | bfd *abfd; | |
527 | PTR ext_ptr; | |
528 | struct internal_reloc *intern; | |
529 | { | |
530 | const RELOC *ext = (RELOC *) ext_ptr; | |
531 | ||
532 | intern->r_vaddr = bfd_h_get_64 (abfd, (bfd_byte *) ext->r_vaddr); | |
533 | intern->r_symndx = bfd_h_get_32 (abfd, (bfd_byte *) ext->r_symndx); | |
534 | ||
535 | BFD_ASSERT (bfd_header_little_endian (abfd)); | |
536 | ||
537 | intern->r_type = ((ext->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
538 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
539 | intern->r_extern = (ext->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
540 | intern->r_offset = ((ext->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
541 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
542 | /* Ignored the reserved bits. */ | |
543 | intern->r_size = ((ext->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
544 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
545 | ||
546 | if (intern->r_type == ALPHA_R_LITUSE | |
547 | || intern->r_type == ALPHA_R_GPDISP) | |
548 | { | |
549 | /* Handle the LITUSE and GPDISP relocs specially. Its symndx | |
550 | value is not actually a symbol index, but is instead a | |
551 | special code. We put the code in the r_size field, and | |
552 | clobber the symndx. */ | |
553 | if (intern->r_size != 0) | |
554 | abort (); | |
555 | intern->r_size = intern->r_symndx; | |
556 | intern->r_symndx = RELOC_SECTION_NONE; | |
557 | } | |
558 | else if (intern->r_type == ALPHA_R_IGNORE) | |
559 | { | |
560 | /* The IGNORE reloc generally follows a GPDISP reloc, and is | |
561 | against the .lita section. The section is irrelevant. */ | |
562 | if (! intern->r_extern && | |
563 | intern->r_symndx == RELOC_SECTION_ABS) | |
564 | abort (); | |
565 | if (! intern->r_extern && intern->r_symndx == RELOC_SECTION_LITA) | |
566 | intern->r_symndx = RELOC_SECTION_ABS; | |
567 | } | |
568 | } | |
569 | ||
570 | /* Swap a reloc out. */ | |
571 | ||
572 | static void | |
573 | alpha_ecoff_swap_reloc_out (abfd, intern, dst) | |
574 | bfd *abfd; | |
575 | const struct internal_reloc *intern; | |
576 | PTR dst; | |
577 | { | |
578 | RELOC *ext = (RELOC *) dst; | |
579 | long symndx; | |
580 | unsigned char size; | |
581 | ||
582 | /* Undo the hackery done in swap_reloc_in. */ | |
583 | if (intern->r_type == ALPHA_R_LITUSE | |
584 | || intern->r_type == ALPHA_R_GPDISP) | |
585 | { | |
586 | symndx = intern->r_size; | |
587 | size = 0; | |
588 | } | |
589 | else if (intern->r_type == ALPHA_R_IGNORE | |
590 | && ! intern->r_extern | |
591 | && intern->r_symndx == RELOC_SECTION_ABS) | |
592 | { | |
593 | symndx = RELOC_SECTION_LITA; | |
594 | size = intern->r_size; | |
595 | } | |
596 | else | |
597 | { | |
598 | symndx = intern->r_symndx; | |
599 | size = intern->r_size; | |
600 | } | |
601 | ||
602 | BFD_ASSERT (intern->r_extern | |
603 | || (intern->r_symndx >= 0 && intern->r_symndx <= 14)); | |
604 | ||
605 | bfd_h_put_64 (abfd, intern->r_vaddr, (bfd_byte *) ext->r_vaddr); | |
606 | bfd_h_put_32 (abfd, symndx, (bfd_byte *) ext->r_symndx); | |
607 | ||
608 | BFD_ASSERT (bfd_header_little_endian (abfd)); | |
609 | ||
610 | ext->r_bits[0] = ((intern->r_type << RELOC_BITS0_TYPE_SH_LITTLE) | |
611 | & RELOC_BITS0_TYPE_LITTLE); | |
612 | ext->r_bits[1] = ((intern->r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0) | |
613 | | ((intern->r_offset << RELOC_BITS1_OFFSET_SH_LITTLE) | |
614 | & RELOC_BITS1_OFFSET_LITTLE)); | |
615 | ext->r_bits[2] = 0; | |
616 | ext->r_bits[3] = ((size << RELOC_BITS3_SIZE_SH_LITTLE) | |
617 | & RELOC_BITS3_SIZE_LITTLE); | |
618 | } | |
619 | ||
620 | /* Finish canonicalizing a reloc. Part of this is generic to all | |
621 | ECOFF targets, and that part is in ecoff.c. The rest is done in | |
622 | this backend routine. It must fill in the howto field. */ | |
623 | ||
624 | static void | |
625 | alpha_adjust_reloc_in (abfd, intern, rptr) | |
626 | bfd *abfd; | |
627 | const struct internal_reloc *intern; | |
628 | arelent *rptr; | |
629 | { | |
630 | if (intern->r_type > ALPHA_R_GPVALUE) | |
631 | abort (); | |
632 | ||
633 | switch (intern->r_type) | |
634 | { | |
635 | case ALPHA_R_BRADDR: | |
636 | case ALPHA_R_SREL16: | |
637 | case ALPHA_R_SREL32: | |
638 | case ALPHA_R_SREL64: | |
639 | /* This relocs appear to be fully resolved when they are against | |
640 | internal symbols. Against external symbols, BRADDR at least | |
641 | appears to be resolved against the next instruction. */ | |
642 | if (! intern->r_extern) | |
643 | rptr->addend = 0; | |
644 | else | |
645 | rptr->addend = - (intern->r_vaddr + 4); | |
646 | break; | |
647 | ||
648 | case ALPHA_R_GPREL32: | |
649 | case ALPHA_R_LITERAL: | |
650 | /* Copy the gp value for this object file into the addend, to | |
651 | ensure that we are not confused by the linker. */ | |
652 | if (! intern->r_extern) | |
653 | rptr->addend += ecoff_data (abfd)->gp; | |
654 | break; | |
655 | ||
656 | case ALPHA_R_LITUSE: | |
657 | case ALPHA_R_GPDISP: | |
658 | /* The LITUSE and GPDISP relocs do not use a symbol, or an | |
659 | addend, but they do use a special code. Put this code in the | |
660 | addend field. */ | |
661 | rptr->addend = intern->r_size; | |
662 | break; | |
663 | ||
664 | case ALPHA_R_OP_STORE: | |
665 | /* The STORE reloc needs the size and offset fields. We store | |
666 | them in the addend. */ | |
667 | BFD_ASSERT (intern->r_offset <= 256 && intern->r_size <= 256); | |
668 | rptr->addend = (intern->r_offset << 8) + intern->r_size; | |
669 | break; | |
670 | ||
671 | case ALPHA_R_OP_PUSH: | |
672 | case ALPHA_R_OP_PSUB: | |
673 | case ALPHA_R_OP_PRSHIFT: | |
674 | /* The PUSH, PSUB and PRSHIFT relocs do not actually use an | |
675 | address. I believe that the address supplied is really an | |
676 | addend. */ | |
677 | rptr->addend = intern->r_vaddr; | |
678 | break; | |
679 | ||
680 | case ALPHA_R_GPVALUE: | |
681 | /* Set the addend field to the new GP value. */ | |
682 | rptr->addend = intern->r_symndx + ecoff_data (abfd)->gp; | |
683 | break; | |
684 | ||
685 | case ALPHA_R_IGNORE: | |
686 | /* If the type is ALPHA_R_IGNORE, make sure this is a reference | |
687 | to the absolute section so that the reloc is ignored. For | |
688 | some reason the address of this reloc type is not adjusted by | |
689 | the section vma. We record the gp value for this object file | |
690 | here, for convenience when doing the GPDISP relocation. */ | |
691 | rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
692 | rptr->address = intern->r_vaddr; | |
693 | rptr->addend = ecoff_data (abfd)->gp; | |
694 | break; | |
695 | ||
696 | default: | |
697 | break; | |
698 | } | |
699 | ||
700 | rptr->howto = &alpha_howto_table[intern->r_type]; | |
701 | } | |
702 | ||
703 | /* When writing out a reloc we need to pull some values back out of | |
704 | the addend field into the reloc. This is roughly the reverse of | |
705 | alpha_adjust_reloc_in, except that there are several changes we do | |
706 | not need to undo. */ | |
707 | ||
708 | static void | |
709 | alpha_adjust_reloc_out (abfd, rel, intern) | |
710 | bfd *abfd; | |
711 | const arelent *rel; | |
712 | struct internal_reloc *intern; | |
713 | { | |
714 | switch (intern->r_type) | |
715 | { | |
716 | case ALPHA_R_LITUSE: | |
717 | case ALPHA_R_GPDISP: | |
718 | intern->r_size = rel->addend; | |
719 | break; | |
720 | ||
721 | case ALPHA_R_OP_STORE: | |
722 | intern->r_size = rel->addend & 0xff; | |
723 | intern->r_offset = (rel->addend >> 8) & 0xff; | |
724 | break; | |
725 | ||
726 | case ALPHA_R_OP_PUSH: | |
727 | case ALPHA_R_OP_PSUB: | |
728 | case ALPHA_R_OP_PRSHIFT: | |
729 | intern->r_vaddr = rel->addend; | |
730 | break; | |
731 | ||
732 | case ALPHA_R_IGNORE: | |
733 | intern->r_vaddr = rel->address; | |
734 | break; | |
735 | ||
736 | default: | |
737 | break; | |
738 | } | |
739 | } | |
740 | ||
741 | /* The size of the stack for the relocation evaluator. */ | |
742 | #define RELOC_STACKSIZE (10) | |
743 | ||
744 | /* Alpha ECOFF relocs have a built in expression evaluator as well as | |
745 | other interdependencies. Rather than use a bunch of special | |
746 | functions and global variables, we use a single routine to do all | |
747 | the relocation for a section. I haven't yet worked out how the | |
748 | assembler is going to handle this. */ | |
749 | ||
750 | static bfd_byte * | |
751 | alpha_ecoff_get_relocated_section_contents (abfd, link_info, link_order, | |
752 | data, relocateable, symbols) | |
753 | bfd *abfd; | |
754 | struct bfd_link_info *link_info; | |
755 | struct bfd_link_order *link_order; | |
756 | bfd_byte *data; | |
757 | boolean relocateable; | |
758 | asymbol **symbols; | |
759 | { | |
760 | bfd *input_bfd = link_order->u.indirect.section->owner; | |
761 | asection *input_section = link_order->u.indirect.section; | |
762 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); | |
763 | arelent **reloc_vector = NULL; | |
764 | long reloc_count; | |
765 | bfd *output_bfd = relocateable ? abfd : (bfd *) NULL; | |
766 | bfd_vma gp; | |
767 | boolean gp_undefined; | |
768 | bfd_vma stack[RELOC_STACKSIZE]; | |
769 | int tos = 0; | |
770 | ||
771 | if (reloc_size < 0) | |
772 | goto error_return; | |
773 | reloc_vector = (arelent **) bfd_malloc (reloc_size); | |
774 | if (reloc_vector == NULL && reloc_size != 0) | |
775 | goto error_return; | |
776 | ||
777 | if (! bfd_get_section_contents (input_bfd, input_section, data, | |
778 | (file_ptr) 0, input_section->_raw_size)) | |
779 | goto error_return; | |
780 | ||
781 | /* The section size is not going to change. */ | |
782 | input_section->_cooked_size = input_section->_raw_size; | |
783 | input_section->reloc_done = true; | |
784 | ||
785 | reloc_count = bfd_canonicalize_reloc (input_bfd, input_section, | |
786 | reloc_vector, symbols); | |
787 | if (reloc_count < 0) | |
788 | goto error_return; | |
789 | if (reloc_count == 0) | |
790 | goto successful_return; | |
791 | ||
792 | /* Get the GP value for the output BFD. */ | |
793 | gp_undefined = false; | |
794 | gp = _bfd_get_gp_value (abfd); | |
795 | if (gp == 0) | |
796 | { | |
797 | if (relocateable != false) | |
798 | { | |
799 | asection *sec; | |
800 | bfd_vma lo; | |
801 | ||
802 | /* Make up a value. */ | |
803 | lo = (bfd_vma) -1; | |
804 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
805 | { | |
806 | if (sec->vma < lo | |
807 | && (strcmp (sec->name, ".sbss") == 0 | |
808 | || strcmp (sec->name, ".sdata") == 0 | |
809 | || strcmp (sec->name, ".lit4") == 0 | |
810 | || strcmp (sec->name, ".lit8") == 0 | |
811 | || strcmp (sec->name, ".lita") == 0)) | |
812 | lo = sec->vma; | |
813 | } | |
814 | gp = lo + 0x8000; | |
815 | _bfd_set_gp_value (abfd, gp); | |
816 | } | |
817 | else | |
818 | { | |
819 | struct bfd_link_hash_entry *h; | |
820 | ||
821 | h = bfd_link_hash_lookup (link_info->hash, "_gp", false, false, | |
822 | true); | |
823 | if (h == (struct bfd_link_hash_entry *) NULL | |
824 | || h->type != bfd_link_hash_defined) | |
825 | gp_undefined = true; | |
826 | else | |
827 | { | |
828 | gp = (h->u.def.value | |
829 | + h->u.def.section->output_section->vma | |
830 | + h->u.def.section->output_offset); | |
831 | _bfd_set_gp_value (abfd, gp); | |
832 | } | |
833 | } | |
834 | } | |
835 | ||
836 | for (; *reloc_vector != (arelent *) NULL; reloc_vector++) | |
837 | { | |
838 | arelent *rel; | |
839 | bfd_reloc_status_type r; | |
840 | char *err; | |
841 | ||
842 | rel = *reloc_vector; | |
843 | r = bfd_reloc_ok; | |
844 | switch (rel->howto->type) | |
845 | { | |
846 | case ALPHA_R_IGNORE: | |
847 | rel->address += input_section->output_offset; | |
848 | break; | |
849 | ||
850 | case ALPHA_R_REFLONG: | |
851 | case ALPHA_R_REFQUAD: | |
852 | case ALPHA_R_BRADDR: | |
853 | case ALPHA_R_HINT: | |
854 | case ALPHA_R_SREL16: | |
855 | case ALPHA_R_SREL32: | |
856 | case ALPHA_R_SREL64: | |
857 | if (relocateable | |
858 | && ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
859 | { | |
860 | rel->address += input_section->output_offset; | |
861 | break; | |
862 | } | |
863 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
864 | output_bfd, &err); | |
865 | break; | |
866 | ||
867 | case ALPHA_R_GPREL32: | |
868 | /* This relocation is used in a switch table. It is a 32 | |
869 | bit offset from the current GP value. We must adjust it | |
870 | by the different between the original GP value and the | |
871 | current GP value. The original GP value is stored in the | |
872 | addend. We adjust the addend and let | |
873 | bfd_perform_relocation finish the job. */ | |
874 | rel->addend -= gp; | |
875 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
876 | output_bfd, &err); | |
877 | if (r == bfd_reloc_ok && gp_undefined) | |
878 | { | |
879 | r = bfd_reloc_dangerous; | |
880 | err = (char *) _("GP relative relocation used when GP not defined"); | |
881 | } | |
882 | break; | |
883 | ||
884 | case ALPHA_R_LITERAL: | |
885 | /* This is a reference to a literal value, generally | |
886 | (always?) in the .lita section. This is a 16 bit GP | |
887 | relative relocation. Sometimes the subsequent reloc is a | |
888 | LITUSE reloc, which indicates how this reloc is used. | |
889 | This sometimes permits rewriting the two instructions | |
890 | referred to by the LITERAL and the LITUSE into different | |
891 | instructions which do not refer to .lita. This can save | |
892 | a memory reference, and permits removing a value from | |
893 | .lita thus saving GP relative space. | |
894 | ||
895 | We do not these optimizations. To do them we would need | |
896 | to arrange to link the .lita section first, so that by | |
897 | the time we got here we would know the final values to | |
898 | use. This would not be particularly difficult, but it is | |
899 | not currently implemented. */ | |
900 | ||
901 | { | |
902 | unsigned long insn; | |
903 | ||
904 | /* I believe that the LITERAL reloc will only apply to a | |
905 | ldq or ldl instruction, so check my assumption. */ | |
906 | insn = bfd_get_32 (input_bfd, data + rel->address); | |
907 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 | |
908 | || ((insn >> 26) & 0x3f) == 0x28); | |
909 | ||
910 | rel->addend -= gp; | |
911 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
912 | output_bfd, &err); | |
913 | if (r == bfd_reloc_ok && gp_undefined) | |
914 | { | |
915 | r = bfd_reloc_dangerous; | |
916 | err = | |
917 | (char *) _("GP relative relocation used when GP not defined"); | |
918 | } | |
919 | } | |
920 | break; | |
921 | ||
922 | case ALPHA_R_LITUSE: | |
923 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
924 | does not cause anything to happen, itself. */ | |
925 | rel->address += input_section->output_offset; | |
926 | break; | |
927 | ||
928 | case ALPHA_R_GPDISP: | |
929 | /* This marks the ldah of an ldah/lda pair which loads the | |
930 | gp register with the difference of the gp value and the | |
931 | current location. The second of the pair is r_size bytes | |
932 | ahead; it used to be marked with an ALPHA_R_IGNORE reloc, | |
933 | but that no longer happens in OSF/1 3.2. */ | |
934 | { | |
935 | unsigned long insn1, insn2; | |
936 | bfd_vma addend; | |
937 | ||
938 | /* Get the two instructions. */ | |
939 | insn1 = bfd_get_32 (input_bfd, data + rel->address); | |
940 | insn2 = bfd_get_32 (input_bfd, data + rel->address + rel->addend); | |
941 | ||
942 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
943 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
944 | ||
945 | /* Get the existing addend. We must account for the sign | |
946 | extension done by lda and ldah. */ | |
947 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
948 | if (insn1 & 0x8000) | |
949 | { | |
950 | addend -= 0x80000000; | |
951 | addend -= 0x80000000; | |
952 | } | |
953 | if (insn2 & 0x8000) | |
954 | addend -= 0x10000; | |
955 | ||
956 | /* The existing addend includes the different between the | |
957 | gp of the input BFD and the address in the input BFD. | |
958 | Subtract this out. */ | |
959 | addend -= (ecoff_data (input_bfd)->gp | |
960 | - (input_section->vma + rel->address)); | |
961 | ||
962 | /* Now add in the final gp value, and subtract out the | |
963 | final address. */ | |
964 | addend += (gp | |
965 | - (input_section->output_section->vma | |
966 | + input_section->output_offset | |
967 | + rel->address)); | |
968 | ||
969 | /* Change the instructions, accounting for the sign | |
970 | extension, and write them out. */ | |
971 | if (addend & 0x8000) | |
972 | addend += 0x10000; | |
973 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
974 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
975 | ||
976 | bfd_put_32 (input_bfd, (bfd_vma) insn1, data + rel->address); | |
977 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
978 | data + rel->address + rel->addend); | |
979 | ||
980 | rel->address += input_section->output_offset; | |
981 | } | |
982 | break; | |
983 | ||
984 | case ALPHA_R_OP_PUSH: | |
985 | /* Push a value on the reloc evaluation stack. */ | |
986 | { | |
987 | asymbol *symbol; | |
988 | bfd_vma relocation; | |
989 | ||
990 | if (relocateable) | |
991 | { | |
992 | rel->address += input_section->output_offset; | |
993 | break; | |
994 | } | |
995 | ||
996 | /* Figure out the relocation of this symbol. */ | |
997 | symbol = *rel->sym_ptr_ptr; | |
998 | ||
999 | if (bfd_is_und_section (symbol->section)) | |
1000 | r = bfd_reloc_undefined; | |
1001 | ||
1002 | if (bfd_is_com_section (symbol->section)) | |
1003 | relocation = 0; | |
1004 | else | |
1005 | relocation = symbol->value; | |
1006 | relocation += symbol->section->output_section->vma; | |
1007 | relocation += symbol->section->output_offset; | |
1008 | relocation += rel->addend; | |
1009 | ||
1010 | if (tos >= RELOC_STACKSIZE) | |
1011 | abort (); | |
1012 | ||
1013 | stack[tos++] = relocation; | |
1014 | } | |
1015 | break; | |
1016 | ||
1017 | case ALPHA_R_OP_STORE: | |
1018 | /* Store a value from the reloc stack into a bitfield. */ | |
1019 | { | |
1020 | bfd_vma val; | |
1021 | int offset, size; | |
1022 | ||
1023 | if (relocateable) | |
1024 | { | |
1025 | rel->address += input_section->output_offset; | |
1026 | break; | |
1027 | } | |
1028 | ||
1029 | if (tos == 0) | |
1030 | abort (); | |
1031 | ||
1032 | /* The offset and size for this reloc are encoded into the | |
1033 | addend field by alpha_adjust_reloc_in. */ | |
1034 | offset = (rel->addend >> 8) & 0xff; | |
1035 | size = rel->addend & 0xff; | |
1036 | ||
1037 | val = bfd_get_64 (abfd, data + rel->address); | |
1038 | val &=~ (((1 << size) - 1) << offset); | |
1039 | val |= (stack[--tos] & ((1 << size) - 1)) << offset; | |
1040 | bfd_put_64 (abfd, val, data + rel->address); | |
1041 | } | |
1042 | break; | |
1043 | ||
1044 | case ALPHA_R_OP_PSUB: | |
1045 | /* Subtract a value from the top of the stack. */ | |
1046 | { | |
1047 | asymbol *symbol; | |
1048 | bfd_vma relocation; | |
1049 | ||
1050 | if (relocateable) | |
1051 | { | |
1052 | rel->address += input_section->output_offset; | |
1053 | break; | |
1054 | } | |
1055 | ||
1056 | /* Figure out the relocation of this symbol. */ | |
1057 | symbol = *rel->sym_ptr_ptr; | |
1058 | ||
1059 | if (bfd_is_und_section (symbol->section)) | |
1060 | r = bfd_reloc_undefined; | |
1061 | ||
1062 | if (bfd_is_com_section (symbol->section)) | |
1063 | relocation = 0; | |
1064 | else | |
1065 | relocation = symbol->value; | |
1066 | relocation += symbol->section->output_section->vma; | |
1067 | relocation += symbol->section->output_offset; | |
1068 | relocation += rel->addend; | |
1069 | ||
1070 | if (tos == 0) | |
1071 | abort (); | |
1072 | ||
1073 | stack[tos - 1] -= relocation; | |
1074 | } | |
1075 | break; | |
1076 | ||
1077 | case ALPHA_R_OP_PRSHIFT: | |
1078 | /* Shift the value on the top of the stack. */ | |
1079 | { | |
1080 | asymbol *symbol; | |
1081 | bfd_vma relocation; | |
1082 | ||
1083 | if (relocateable) | |
1084 | { | |
1085 | rel->address += input_section->output_offset; | |
1086 | break; | |
1087 | } | |
1088 | ||
1089 | /* Figure out the relocation of this symbol. */ | |
1090 | symbol = *rel->sym_ptr_ptr; | |
1091 | ||
1092 | if (bfd_is_und_section (symbol->section)) | |
1093 | r = bfd_reloc_undefined; | |
1094 | ||
1095 | if (bfd_is_com_section (symbol->section)) | |
1096 | relocation = 0; | |
1097 | else | |
1098 | relocation = symbol->value; | |
1099 | relocation += symbol->section->output_section->vma; | |
1100 | relocation += symbol->section->output_offset; | |
1101 | relocation += rel->addend; | |
1102 | ||
1103 | if (tos == 0) | |
1104 | abort (); | |
1105 | ||
1106 | stack[tos - 1] >>= relocation; | |
1107 | } | |
1108 | break; | |
1109 | ||
1110 | case ALPHA_R_GPVALUE: | |
1111 | /* I really don't know if this does the right thing. */ | |
1112 | gp = rel->addend; | |
1113 | gp_undefined = false; | |
1114 | break; | |
1115 | ||
1116 | default: | |
1117 | abort (); | |
1118 | } | |
1119 | ||
1120 | if (relocateable) | |
1121 | { | |
1122 | asection *os = input_section->output_section; | |
1123 | ||
1124 | /* A partial link, so keep the relocs. */ | |
1125 | os->orelocation[os->reloc_count] = rel; | |
1126 | os->reloc_count++; | |
1127 | } | |
1128 | ||
1129 | if (r != bfd_reloc_ok) | |
1130 | { | |
1131 | switch (r) | |
1132 | { | |
1133 | case bfd_reloc_undefined: | |
1134 | if (! ((*link_info->callbacks->undefined_symbol) | |
1135 | (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr), | |
1136 | input_bfd, input_section, rel->address))) | |
1137 | goto error_return; | |
1138 | break; | |
1139 | case bfd_reloc_dangerous: | |
1140 | if (! ((*link_info->callbacks->reloc_dangerous) | |
1141 | (link_info, err, input_bfd, input_section, | |
1142 | rel->address))) | |
1143 | goto error_return; | |
1144 | break; | |
1145 | case bfd_reloc_overflow: | |
1146 | if (! ((*link_info->callbacks->reloc_overflow) | |
1147 | (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr), | |
1148 | rel->howto->name, rel->addend, input_bfd, | |
1149 | input_section, rel->address))) | |
1150 | goto error_return; | |
1151 | break; | |
1152 | case bfd_reloc_outofrange: | |
1153 | default: | |
1154 | abort (); | |
1155 | break; | |
1156 | } | |
1157 | } | |
1158 | } | |
1159 | ||
1160 | if (tos != 0) | |
1161 | abort (); | |
1162 | ||
1163 | successful_return: | |
1164 | if (reloc_vector != NULL) | |
1165 | free (reloc_vector); | |
1166 | return data; | |
1167 | ||
1168 | error_return: | |
1169 | if (reloc_vector != NULL) | |
1170 | free (reloc_vector); | |
1171 | return NULL; | |
1172 | } | |
1173 | ||
1174 | /* Get the howto structure for a generic reloc type. */ | |
1175 | ||
1176 | static reloc_howto_type * | |
1177 | alpha_bfd_reloc_type_lookup (abfd, code) | |
1178 | bfd *abfd; | |
1179 | bfd_reloc_code_real_type code; | |
1180 | { | |
1181 | int alpha_type; | |
1182 | ||
1183 | switch (code) | |
1184 | { | |
1185 | case BFD_RELOC_32: | |
1186 | alpha_type = ALPHA_R_REFLONG; | |
1187 | break; | |
1188 | case BFD_RELOC_64: | |
1189 | case BFD_RELOC_CTOR: | |
1190 | alpha_type = ALPHA_R_REFQUAD; | |
1191 | break; | |
1192 | case BFD_RELOC_GPREL32: | |
1193 | alpha_type = ALPHA_R_GPREL32; | |
1194 | break; | |
1195 | case BFD_RELOC_ALPHA_LITERAL: | |
1196 | alpha_type = ALPHA_R_LITERAL; | |
1197 | break; | |
1198 | case BFD_RELOC_ALPHA_LITUSE: | |
1199 | alpha_type = ALPHA_R_LITUSE; | |
1200 | break; | |
1201 | case BFD_RELOC_ALPHA_GPDISP_HI16: | |
1202 | alpha_type = ALPHA_R_GPDISP; | |
1203 | break; | |
1204 | case BFD_RELOC_ALPHA_GPDISP_LO16: | |
1205 | alpha_type = ALPHA_R_IGNORE; | |
1206 | break; | |
1207 | case BFD_RELOC_23_PCREL_S2: | |
1208 | alpha_type = ALPHA_R_BRADDR; | |
1209 | break; | |
1210 | case BFD_RELOC_ALPHA_HINT: | |
1211 | alpha_type = ALPHA_R_HINT; | |
1212 | break; | |
1213 | case BFD_RELOC_16_PCREL: | |
1214 | alpha_type = ALPHA_R_SREL16; | |
1215 | break; | |
1216 | case BFD_RELOC_32_PCREL: | |
1217 | alpha_type = ALPHA_R_SREL32; | |
1218 | break; | |
1219 | case BFD_RELOC_64_PCREL: | |
1220 | alpha_type = ALPHA_R_SREL64; | |
1221 | break; | |
1222 | #if 0 | |
1223 | case ???: | |
1224 | alpha_type = ALPHA_R_OP_PUSH; | |
1225 | break; | |
1226 | case ???: | |
1227 | alpha_type = ALPHA_R_OP_STORE; | |
1228 | break; | |
1229 | case ???: | |
1230 | alpha_type = ALPHA_R_OP_PSUB; | |
1231 | break; | |
1232 | case ???: | |
1233 | alpha_type = ALPHA_R_OP_PRSHIFT; | |
1234 | break; | |
1235 | case ???: | |
1236 | alpha_type = ALPHA_R_GPVALUE; | |
1237 | break; | |
1238 | #endif | |
1239 | default: | |
1240 | return (reloc_howto_type *) NULL; | |
1241 | } | |
1242 | ||
1243 | return &alpha_howto_table[alpha_type]; | |
1244 | } | |
1245 | \f | |
1246 | /* A helper routine for alpha_relocate_section which converts an | |
1247 | external reloc when generating relocateable output. Returns the | |
1248 | relocation amount. */ | |
1249 | ||
1250 | static bfd_vma | |
1251 | alpha_convert_external_reloc (output_bfd, info, input_bfd, ext_rel, h) | |
1252 | bfd *output_bfd; | |
1253 | struct bfd_link_info *info; | |
1254 | bfd *input_bfd; | |
1255 | struct external_reloc *ext_rel; | |
1256 | struct ecoff_link_hash_entry *h; | |
1257 | { | |
1258 | unsigned long r_symndx; | |
1259 | bfd_vma relocation; | |
1260 | ||
1261 | BFD_ASSERT (info->relocateable); | |
1262 | ||
1263 | if (h->root.type == bfd_link_hash_defined | |
1264 | || h->root.type == bfd_link_hash_defweak) | |
1265 | { | |
1266 | asection *hsec; | |
1267 | const char *name; | |
1268 | ||
1269 | /* This symbol is defined in the output. Convert the reloc from | |
1270 | being against the symbol to being against the section. */ | |
1271 | ||
1272 | /* Clear the r_extern bit. */ | |
1273 | ext_rel->r_bits[1] &=~ RELOC_BITS1_EXTERN_LITTLE; | |
1274 | ||
1275 | /* Compute a new r_symndx value. */ | |
1276 | hsec = h->root.u.def.section; | |
1277 | name = bfd_get_section_name (output_bfd, hsec->output_section); | |
1278 | ||
1279 | r_symndx = -1; | |
1280 | switch (name[1]) | |
1281 | { | |
1282 | case 'A': | |
1283 | if (strcmp (name, "*ABS*") == 0) | |
1284 | r_symndx = RELOC_SECTION_ABS; | |
1285 | break; | |
1286 | case 'b': | |
1287 | if (strcmp (name, ".bss") == 0) | |
1288 | r_symndx = RELOC_SECTION_BSS; | |
1289 | break; | |
1290 | case 'd': | |
1291 | if (strcmp (name, ".data") == 0) | |
1292 | r_symndx = RELOC_SECTION_DATA; | |
1293 | break; | |
1294 | case 'f': | |
1295 | if (strcmp (name, ".fini") == 0) | |
1296 | r_symndx = RELOC_SECTION_FINI; | |
1297 | break; | |
1298 | case 'i': | |
1299 | if (strcmp (name, ".init") == 0) | |
1300 | r_symndx = RELOC_SECTION_INIT; | |
1301 | break; | |
1302 | case 'l': | |
1303 | if (strcmp (name, ".lita") == 0) | |
1304 | r_symndx = RELOC_SECTION_LITA; | |
1305 | else if (strcmp (name, ".lit8") == 0) | |
1306 | r_symndx = RELOC_SECTION_LIT8; | |
1307 | else if (strcmp (name, ".lit4") == 0) | |
1308 | r_symndx = RELOC_SECTION_LIT4; | |
1309 | break; | |
1310 | case 'p': | |
1311 | if (strcmp (name, ".pdata") == 0) | |
1312 | r_symndx = RELOC_SECTION_PDATA; | |
1313 | break; | |
1314 | case 'r': | |
1315 | if (strcmp (name, ".rdata") == 0) | |
1316 | r_symndx = RELOC_SECTION_RDATA; | |
1317 | else if (strcmp (name, ".rconst") == 0) | |
1318 | r_symndx = RELOC_SECTION_RCONST; | |
1319 | break; | |
1320 | case 's': | |
1321 | if (strcmp (name, ".sdata") == 0) | |
1322 | r_symndx = RELOC_SECTION_SDATA; | |
1323 | else if (strcmp (name, ".sbss") == 0) | |
1324 | r_symndx = RELOC_SECTION_SBSS; | |
1325 | break; | |
1326 | case 't': | |
1327 | if (strcmp (name, ".text") == 0) | |
1328 | r_symndx = RELOC_SECTION_TEXT; | |
1329 | break; | |
1330 | case 'x': | |
1331 | if (strcmp (name, ".xdata") == 0) | |
1332 | r_symndx = RELOC_SECTION_XDATA; | |
1333 | break; | |
1334 | } | |
1335 | ||
1336 | if (r_symndx == -1) | |
1337 | abort (); | |
1338 | ||
1339 | /* Add the section VMA and the symbol value. */ | |
1340 | relocation = (h->root.u.def.value | |
1341 | + hsec->output_section->vma | |
1342 | + hsec->output_offset); | |
1343 | } | |
1344 | else | |
1345 | { | |
1346 | /* Change the symndx value to the right one for | |
1347 | the output BFD. */ | |
1348 | r_symndx = h->indx; | |
1349 | if (r_symndx == -1) | |
1350 | { | |
1351 | /* Caller must give an error. */ | |
1352 | r_symndx = 0; | |
1353 | } | |
1354 | relocation = 0; | |
1355 | } | |
1356 | ||
1357 | /* Write out the new r_symndx value. */ | |
1358 | bfd_h_put_32 (input_bfd, (bfd_vma) r_symndx, | |
1359 | (bfd_byte *) ext_rel->r_symndx); | |
1360 | ||
1361 | return relocation; | |
1362 | } | |
1363 | ||
1364 | /* Relocate a section while linking an Alpha ECOFF file. This is | |
1365 | quite similar to get_relocated_section_contents. Perhaps they | |
1366 | could be combined somehow. */ | |
1367 | ||
1368 | static boolean | |
1369 | alpha_relocate_section (output_bfd, info, input_bfd, input_section, | |
1370 | contents, external_relocs) | |
1371 | bfd *output_bfd; | |
1372 | struct bfd_link_info *info; | |
1373 | bfd *input_bfd; | |
1374 | asection *input_section; | |
1375 | bfd_byte *contents; | |
1376 | PTR external_relocs; | |
1377 | { | |
1378 | asection **symndx_to_section, *lita_sec; | |
1379 | struct ecoff_link_hash_entry **sym_hashes; | |
1380 | bfd_vma gp; | |
1381 | boolean gp_undefined; | |
1382 | bfd_vma stack[RELOC_STACKSIZE]; | |
1383 | int tos = 0; | |
1384 | struct external_reloc *ext_rel; | |
1385 | struct external_reloc *ext_rel_end; | |
1386 | ||
1387 | /* We keep a table mapping the symndx found in an internal reloc to | |
1388 | the appropriate section. This is faster than looking up the | |
1389 | section by name each time. */ | |
1390 | symndx_to_section = ecoff_data (input_bfd)->symndx_to_section; | |
1391 | if (symndx_to_section == (asection **) NULL) | |
1392 | { | |
1393 | symndx_to_section = ((asection **) | |
1394 | bfd_alloc (input_bfd, | |
1395 | (NUM_RELOC_SECTIONS | |
1396 | * sizeof (asection *)))); | |
1397 | if (!symndx_to_section) | |
1398 | return false; | |
1399 | ||
1400 | symndx_to_section[RELOC_SECTION_NONE] = NULL; | |
1401 | symndx_to_section[RELOC_SECTION_TEXT] = | |
1402 | bfd_get_section_by_name (input_bfd, ".text"); | |
1403 | symndx_to_section[RELOC_SECTION_RDATA] = | |
1404 | bfd_get_section_by_name (input_bfd, ".rdata"); | |
1405 | symndx_to_section[RELOC_SECTION_DATA] = | |
1406 | bfd_get_section_by_name (input_bfd, ".data"); | |
1407 | symndx_to_section[RELOC_SECTION_SDATA] = | |
1408 | bfd_get_section_by_name (input_bfd, ".sdata"); | |
1409 | symndx_to_section[RELOC_SECTION_SBSS] = | |
1410 | bfd_get_section_by_name (input_bfd, ".sbss"); | |
1411 | symndx_to_section[RELOC_SECTION_BSS] = | |
1412 | bfd_get_section_by_name (input_bfd, ".bss"); | |
1413 | symndx_to_section[RELOC_SECTION_INIT] = | |
1414 | bfd_get_section_by_name (input_bfd, ".init"); | |
1415 | symndx_to_section[RELOC_SECTION_LIT8] = | |
1416 | bfd_get_section_by_name (input_bfd, ".lit8"); | |
1417 | symndx_to_section[RELOC_SECTION_LIT4] = | |
1418 | bfd_get_section_by_name (input_bfd, ".lit4"); | |
1419 | symndx_to_section[RELOC_SECTION_XDATA] = | |
1420 | bfd_get_section_by_name (input_bfd, ".xdata"); | |
1421 | symndx_to_section[RELOC_SECTION_PDATA] = | |
1422 | bfd_get_section_by_name (input_bfd, ".pdata"); | |
1423 | symndx_to_section[RELOC_SECTION_FINI] = | |
1424 | bfd_get_section_by_name (input_bfd, ".fini"); | |
1425 | symndx_to_section[RELOC_SECTION_LITA] = | |
1426 | bfd_get_section_by_name (input_bfd, ".lita"); | |
1427 | symndx_to_section[RELOC_SECTION_ABS] = bfd_abs_section_ptr; | |
1428 | symndx_to_section[RELOC_SECTION_RCONST] = | |
1429 | bfd_get_section_by_name (input_bfd, ".rconst"); | |
1430 | ||
1431 | ecoff_data (input_bfd)->symndx_to_section = symndx_to_section; | |
1432 | } | |
1433 | ||
1434 | sym_hashes = ecoff_data (input_bfd)->sym_hashes; | |
1435 | ||
1436 | /* On the Alpha, the .lita section must be addressable by the global | |
1437 | pointer. To support large programs, we need to allow multiple | |
1438 | global pointers. This works as long as each input .lita section | |
1439 | is <64KB big. This implies that when producing relocatable | |
1440 | output, the .lita section is limited to 64KB. . */ | |
1441 | ||
1442 | lita_sec = symndx_to_section[RELOC_SECTION_LITA]; | |
1443 | gp = _bfd_get_gp_value (output_bfd); | |
1444 | if (! info->relocateable && lita_sec != NULL) | |
1445 | { | |
1446 | struct ecoff_section_tdata *lita_sec_data; | |
1447 | ||
1448 | /* Make sure we have a section data structure to which we can | |
1449 | hang on to the gp value we pick for the section. */ | |
1450 | lita_sec_data = ecoff_section_data (input_bfd, lita_sec); | |
1451 | if (lita_sec_data == NULL) | |
1452 | { | |
1453 | lita_sec_data = ((struct ecoff_section_tdata *) | |
1454 | bfd_zalloc (input_bfd, | |
1455 | sizeof (struct ecoff_section_tdata))); | |
1456 | ecoff_section_data (input_bfd, lita_sec) = lita_sec_data; | |
1457 | } | |
1458 | ||
1459 | if (lita_sec_data->gp != 0) | |
1460 | { | |
1461 | /* If we already assigned a gp to this section, we better | |
1462 | stick with that value. */ | |
1463 | gp = lita_sec_data->gp; | |
1464 | } | |
1465 | else | |
1466 | { | |
1467 | bfd_vma lita_vma; | |
1468 | bfd_size_type lita_size; | |
1469 | ||
1470 | lita_vma = lita_sec->output_offset + lita_sec->output_section->vma; | |
1471 | lita_size = lita_sec->_cooked_size; | |
1472 | if (lita_size == 0) | |
1473 | lita_size = lita_sec->_raw_size; | |
1474 | ||
1475 | if (gp == 0 | |
1476 | || lita_vma < gp - 0x8000 | |
1477 | || lita_vma + lita_size >= gp + 0x8000) | |
1478 | { | |
1479 | /* Either gp hasn't been set at all or the current gp | |
1480 | cannot address this .lita section. In both cases we | |
1481 | reset the gp to point into the "middle" of the | |
1482 | current input .lita section. */ | |
1483 | if (gp && !ecoff_data (output_bfd)->issued_multiple_gp_warning) | |
1484 | { | |
1485 | (*info->callbacks->warning) (info, | |
1486 | _("using multiple gp values"), | |
1487 | (char *) NULL, output_bfd, | |
1488 | (asection *) NULL, (bfd_vma) 0); | |
1489 | ecoff_data (output_bfd)->issued_multiple_gp_warning = true; | |
1490 | } | |
1491 | if (lita_vma < gp - 0x8000) | |
1492 | gp = lita_vma + lita_size - 0x8000; | |
1493 | else | |
1494 | gp = lita_vma + 0x8000; | |
1495 | ||
1496 | } | |
1497 | ||
1498 | lita_sec_data->gp = gp; | |
1499 | } | |
1500 | ||
1501 | _bfd_set_gp_value (output_bfd, gp); | |
1502 | } | |
1503 | ||
1504 | gp_undefined = (gp == 0); | |
1505 | ||
1506 | BFD_ASSERT (bfd_header_little_endian (output_bfd)); | |
1507 | BFD_ASSERT (bfd_header_little_endian (input_bfd)); | |
1508 | ||
1509 | ext_rel = (struct external_reloc *) external_relocs; | |
1510 | ext_rel_end = ext_rel + input_section->reloc_count; | |
1511 | for (; ext_rel < ext_rel_end; ext_rel++) | |
1512 | { | |
1513 | bfd_vma r_vaddr; | |
1514 | unsigned long r_symndx; | |
1515 | int r_type; | |
1516 | int r_extern; | |
1517 | int r_offset; | |
1518 | int r_size; | |
1519 | boolean relocatep; | |
1520 | boolean adjust_addrp; | |
1521 | boolean gp_usedp; | |
1522 | bfd_vma addend; | |
1523 | ||
1524 | r_vaddr = bfd_h_get_64 (input_bfd, (bfd_byte *) ext_rel->r_vaddr); | |
1525 | r_symndx = bfd_h_get_32 (input_bfd, (bfd_byte *) ext_rel->r_symndx); | |
1526 | ||
1527 | r_type = ((ext_rel->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
1528 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
1529 | r_extern = (ext_rel->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
1530 | r_offset = ((ext_rel->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
1531 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
1532 | /* Ignored the reserved bits. */ | |
1533 | r_size = ((ext_rel->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
1534 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
1535 | ||
1536 | relocatep = false; | |
1537 | adjust_addrp = true; | |
1538 | gp_usedp = false; | |
1539 | addend = 0; | |
1540 | ||
1541 | switch (r_type) | |
1542 | { | |
1543 | default: | |
1544 | abort (); | |
1545 | ||
1546 | case ALPHA_R_IGNORE: | |
1547 | /* This reloc appears after a GPDISP reloc. On earlier | |
1548 | versions of OSF/1, It marked the position of the second | |
1549 | instruction to be altered by the GPDISP reloc, but it is | |
1550 | not otherwise used for anything. For some reason, the | |
1551 | address of the relocation does not appear to include the | |
1552 | section VMA, unlike the other relocation types. */ | |
1553 | if (info->relocateable) | |
1554 | bfd_h_put_64 (input_bfd, | |
1555 | input_section->output_offset + r_vaddr, | |
1556 | (bfd_byte *) ext_rel->r_vaddr); | |
1557 | adjust_addrp = false; | |
1558 | break; | |
1559 | ||
1560 | case ALPHA_R_REFLONG: | |
1561 | case ALPHA_R_REFQUAD: | |
1562 | case ALPHA_R_HINT: | |
1563 | relocatep = true; | |
1564 | break; | |
1565 | ||
1566 | case ALPHA_R_BRADDR: | |
1567 | case ALPHA_R_SREL16: | |
1568 | case ALPHA_R_SREL32: | |
1569 | case ALPHA_R_SREL64: | |
1570 | if (r_extern) | |
1571 | addend += - (r_vaddr + 4); | |
1572 | relocatep = true; | |
1573 | break; | |
1574 | ||
1575 | case ALPHA_R_GPREL32: | |
1576 | /* This relocation is used in a switch table. It is a 32 | |
1577 | bit offset from the current GP value. We must adjust it | |
1578 | by the different between the original GP value and the | |
1579 | current GP value. */ | |
1580 | relocatep = true; | |
1581 | addend = ecoff_data (input_bfd)->gp - gp; | |
1582 | gp_usedp = true; | |
1583 | break; | |
1584 | ||
1585 | case ALPHA_R_LITERAL: | |
1586 | /* This is a reference to a literal value, generally | |
1587 | (always?) in the .lita section. This is a 16 bit GP | |
1588 | relative relocation. Sometimes the subsequent reloc is a | |
1589 | LITUSE reloc, which indicates how this reloc is used. | |
1590 | This sometimes permits rewriting the two instructions | |
1591 | referred to by the LITERAL and the LITUSE into different | |
1592 | instructions which do not refer to .lita. This can save | |
1593 | a memory reference, and permits removing a value from | |
1594 | .lita thus saving GP relative space. | |
1595 | ||
1596 | We do not these optimizations. To do them we would need | |
1597 | to arrange to link the .lita section first, so that by | |
1598 | the time we got here we would know the final values to | |
1599 | use. This would not be particularly difficult, but it is | |
1600 | not currently implemented. */ | |
1601 | ||
1602 | /* I believe that the LITERAL reloc will only apply to a ldq | |
1603 | or ldl instruction, so check my assumption. */ | |
1604 | { | |
1605 | unsigned long insn; | |
1606 | ||
1607 | insn = bfd_get_32 (input_bfd, | |
1608 | contents + r_vaddr - input_section->vma); | |
1609 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 | |
1610 | || ((insn >> 26) & 0x3f) == 0x28); | |
1611 | } | |
1612 | ||
1613 | relocatep = true; | |
1614 | addend = ecoff_data (input_bfd)->gp - gp; | |
1615 | gp_usedp = true; | |
1616 | break; | |
1617 | ||
1618 | case ALPHA_R_LITUSE: | |
1619 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
1620 | does not cause anything to happen, itself. */ | |
1621 | break; | |
1622 | ||
1623 | case ALPHA_R_GPDISP: | |
1624 | /* This marks the ldah of an ldah/lda pair which loads the | |
1625 | gp register with the difference of the gp value and the | |
1626 | current location. The second of the pair is r_symndx | |
1627 | bytes ahead. It used to be marked with an ALPHA_R_IGNORE | |
1628 | reloc, but OSF/1 3.2 no longer does that. */ | |
1629 | { | |
1630 | unsigned long insn1, insn2; | |
1631 | ||
1632 | /* Get the two instructions. */ | |
1633 | insn1 = bfd_get_32 (input_bfd, | |
1634 | contents + r_vaddr - input_section->vma); | |
1635 | insn2 = bfd_get_32 (input_bfd, | |
1636 | (contents | |
1637 | + r_vaddr | |
1638 | - input_section->vma | |
1639 | + r_symndx)); | |
1640 | ||
1641 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
1642 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
1643 | ||
1644 | /* Get the existing addend. We must account for the sign | |
1645 | extension done by lda and ldah. */ | |
1646 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
1647 | if (insn1 & 0x8000) | |
1648 | { | |
1649 | /* This is addend -= 0x100000000 without causing an | |
1650 | integer overflow on a 32 bit host. */ | |
1651 | addend -= 0x80000000; | |
1652 | addend -= 0x80000000; | |
1653 | } | |
1654 | if (insn2 & 0x8000) | |
1655 | addend -= 0x10000; | |
1656 | ||
1657 | /* The existing addend includes the difference between the | |
1658 | gp of the input BFD and the address in the input BFD. | |
1659 | We want to change this to the difference between the | |
1660 | final GP and the final address. */ | |
1661 | addend += (gp | |
1662 | - ecoff_data (input_bfd)->gp | |
1663 | + input_section->vma | |
1664 | - (input_section->output_section->vma | |
1665 | + input_section->output_offset)); | |
1666 | ||
1667 | /* Change the instructions, accounting for the sign | |
1668 | extension, and write them out. */ | |
1669 | if (addend & 0x8000) | |
1670 | addend += 0x10000; | |
1671 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
1672 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
1673 | ||
1674 | bfd_put_32 (input_bfd, (bfd_vma) insn1, | |
1675 | contents + r_vaddr - input_section->vma); | |
1676 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
1677 | contents + r_vaddr - input_section->vma + r_symndx); | |
1678 | ||
1679 | gp_usedp = true; | |
1680 | } | |
1681 | break; | |
1682 | ||
1683 | case ALPHA_R_OP_PUSH: | |
1684 | case ALPHA_R_OP_PSUB: | |
1685 | case ALPHA_R_OP_PRSHIFT: | |
1686 | /* Manipulate values on the reloc evaluation stack. The | |
1687 | r_vaddr field is not an address in input_section, it is | |
1688 | the current value (including any addend) of the object | |
1689 | being used. */ | |
1690 | if (! r_extern) | |
1691 | { | |
1692 | asection *s; | |
1693 | ||
1694 | s = symndx_to_section[r_symndx]; | |
1695 | if (s == (asection *) NULL) | |
1696 | abort (); | |
1697 | addend = s->output_section->vma + s->output_offset - s->vma; | |
1698 | } | |
1699 | else | |
1700 | { | |
1701 | struct ecoff_link_hash_entry *h; | |
1702 | ||
1703 | h = sym_hashes[r_symndx]; | |
1704 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1705 | abort (); | |
1706 | ||
1707 | if (! info->relocateable) | |
1708 | { | |
1709 | if (h->root.type == bfd_link_hash_defined | |
1710 | || h->root.type == bfd_link_hash_defweak) | |
1711 | addend = (h->root.u.def.value | |
1712 | + h->root.u.def.section->output_section->vma | |
1713 | + h->root.u.def.section->output_offset); | |
1714 | else | |
1715 | { | |
1716 | /* Note that we pass the address as 0, since we | |
1717 | do not have a meaningful number for the | |
1718 | location within the section that is being | |
1719 | relocated. */ | |
1720 | if (! ((*info->callbacks->undefined_symbol) | |
1721 | (info, h->root.root.string, input_bfd, | |
1722 | input_section, (bfd_vma) 0))) | |
1723 | return false; | |
1724 | addend = 0; | |
1725 | } | |
1726 | } | |
1727 | else | |
1728 | { | |
1729 | if (h->root.type != bfd_link_hash_defined | |
1730 | && h->root.type != bfd_link_hash_defweak | |
1731 | && h->indx == -1) | |
1732 | { | |
1733 | /* This symbol is not being written out. Pass | |
1734 | the address as 0, as with undefined_symbol, | |
1735 | above. */ | |
1736 | if (! ((*info->callbacks->unattached_reloc) | |
1737 | (info, h->root.root.string, input_bfd, | |
1738 | input_section, (bfd_vma) 0))) | |
1739 | return false; | |
1740 | } | |
1741 | ||
1742 | addend = alpha_convert_external_reloc (output_bfd, info, | |
1743 | input_bfd, | |
1744 | ext_rel, h); | |
1745 | } | |
1746 | } | |
1747 | ||
1748 | addend += r_vaddr; | |
1749 | ||
1750 | if (info->relocateable) | |
1751 | { | |
1752 | /* Adjust r_vaddr by the addend. */ | |
1753 | bfd_h_put_64 (input_bfd, addend, | |
1754 | (bfd_byte *) ext_rel->r_vaddr); | |
1755 | } | |
1756 | else | |
1757 | { | |
1758 | switch (r_type) | |
1759 | { | |
1760 | case ALPHA_R_OP_PUSH: | |
1761 | if (tos >= RELOC_STACKSIZE) | |
1762 | abort (); | |
1763 | stack[tos++] = addend; | |
1764 | break; | |
1765 | ||
1766 | case ALPHA_R_OP_PSUB: | |
1767 | if (tos == 0) | |
1768 | abort (); | |
1769 | stack[tos - 1] -= addend; | |
1770 | break; | |
1771 | ||
1772 | case ALPHA_R_OP_PRSHIFT: | |
1773 | if (tos == 0) | |
1774 | abort (); | |
1775 | stack[tos - 1] >>= addend; | |
1776 | break; | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | adjust_addrp = false; | |
1781 | break; | |
1782 | ||
1783 | case ALPHA_R_OP_STORE: | |
1784 | /* Store a value from the reloc stack into a bitfield. If | |
1785 | we are generating relocateable output, all we do is | |
1786 | adjust the address of the reloc. */ | |
1787 | if (! info->relocateable) | |
1788 | { | |
1789 | bfd_vma mask; | |
1790 | bfd_vma val; | |
1791 | ||
1792 | if (tos == 0) | |
1793 | abort (); | |
1794 | ||
1795 | /* Get the relocation mask. The separate steps and the | |
1796 | casts to bfd_vma are attempts to avoid a bug in the | |
1797 | Alpha OSF 1.3 C compiler. See reloc.c for more | |
1798 | details. */ | |
1799 | mask = 1; | |
1800 | mask <<= (bfd_vma) r_size; | |
1801 | mask -= 1; | |
1802 | ||
1803 | /* FIXME: I don't know what kind of overflow checking, | |
1804 | if any, should be done here. */ | |
1805 | val = bfd_get_64 (input_bfd, | |
1806 | contents + r_vaddr - input_section->vma); | |
1807 | val &=~ mask << (bfd_vma) r_offset; | |
1808 | val |= (stack[--tos] & mask) << (bfd_vma) r_offset; | |
1809 | bfd_put_64 (input_bfd, val, | |
1810 | contents + r_vaddr - input_section->vma); | |
1811 | } | |
1812 | break; | |
1813 | ||
1814 | case ALPHA_R_GPVALUE: | |
1815 | /* I really don't know if this does the right thing. */ | |
1816 | gp = ecoff_data (input_bfd)->gp + r_symndx; | |
1817 | gp_undefined = false; | |
1818 | break; | |
1819 | } | |
1820 | ||
1821 | if (relocatep) | |
1822 | { | |
1823 | reloc_howto_type *howto; | |
1824 | struct ecoff_link_hash_entry *h = NULL; | |
1825 | asection *s = NULL; | |
1826 | bfd_vma relocation; | |
1827 | bfd_reloc_status_type r; | |
1828 | ||
1829 | /* Perform a relocation. */ | |
1830 | ||
1831 | howto = &alpha_howto_table[r_type]; | |
1832 | ||
1833 | if (r_extern) | |
1834 | { | |
1835 | h = sym_hashes[r_symndx]; | |
1836 | /* If h is NULL, that means that there is a reloc | |
1837 | against an external symbol which we thought was just | |
1838 | a debugging symbol. This should not happen. */ | |
1839 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1840 | abort (); | |
1841 | } | |
1842 | else | |
1843 | { | |
1844 | if (r_symndx >= NUM_RELOC_SECTIONS) | |
1845 | s = NULL; | |
1846 | else | |
1847 | s = symndx_to_section[r_symndx]; | |
1848 | ||
1849 | if (s == (asection *) NULL) | |
1850 | abort (); | |
1851 | } | |
1852 | ||
1853 | if (info->relocateable) | |
1854 | { | |
1855 | /* We are generating relocateable output, and must | |
1856 | convert the existing reloc. */ | |
1857 | if (r_extern) | |
1858 | { | |
1859 | if (h->root.type != bfd_link_hash_defined | |
1860 | && h->root.type != bfd_link_hash_defweak | |
1861 | && h->indx == -1) | |
1862 | { | |
1863 | /* This symbol is not being written out. */ | |
1864 | if (! ((*info->callbacks->unattached_reloc) | |
1865 | (info, h->root.root.string, input_bfd, | |
1866 | input_section, r_vaddr - input_section->vma))) | |
1867 | return false; | |
1868 | } | |
1869 | ||
1870 | relocation = alpha_convert_external_reloc (output_bfd, | |
1871 | info, | |
1872 | input_bfd, | |
1873 | ext_rel, | |
1874 | h); | |
1875 | } | |
1876 | else | |
1877 | { | |
1878 | /* This is a relocation against a section. Adjust | |
1879 | the value by the amount the section moved. */ | |
1880 | relocation = (s->output_section->vma | |
1881 | + s->output_offset | |
1882 | - s->vma); | |
1883 | } | |
1884 | ||
1885 | /* If this is PC relative, the existing object file | |
1886 | appears to already have the reloc worked out. We | |
1887 | must subtract out the old value and add in the new | |
1888 | one. */ | |
1889 | if (howto->pc_relative) | |
1890 | relocation -= (input_section->output_section->vma | |
1891 | + input_section->output_offset | |
1892 | - input_section->vma); | |
1893 | ||
1894 | /* Put in any addend. */ | |
1895 | relocation += addend; | |
1896 | ||
1897 | /* Adjust the contents. */ | |
1898 | r = _bfd_relocate_contents (howto, input_bfd, relocation, | |
1899 | (contents | |
1900 | + r_vaddr | |
1901 | - input_section->vma)); | |
1902 | } | |
1903 | else | |
1904 | { | |
1905 | /* We are producing a final executable. */ | |
1906 | if (r_extern) | |
1907 | { | |
1908 | /* This is a reloc against a symbol. */ | |
1909 | if (h->root.type == bfd_link_hash_defined | |
1910 | || h->root.type == bfd_link_hash_defweak) | |
1911 | { | |
1912 | asection *hsec; | |
1913 | ||
1914 | hsec = h->root.u.def.section; | |
1915 | relocation = (h->root.u.def.value | |
1916 | + hsec->output_section->vma | |
1917 | + hsec->output_offset); | |
1918 | } | |
1919 | else | |
1920 | { | |
1921 | if (! ((*info->callbacks->undefined_symbol) | |
1922 | (info, h->root.root.string, input_bfd, | |
1923 | input_section, | |
1924 | r_vaddr - input_section->vma))) | |
1925 | return false; | |
1926 | relocation = 0; | |
1927 | } | |
1928 | } | |
1929 | else | |
1930 | { | |
1931 | /* This is a reloc against a section. */ | |
1932 | relocation = (s->output_section->vma | |
1933 | + s->output_offset | |
1934 | - s->vma); | |
1935 | ||
1936 | /* Adjust a PC relative relocation by removing the | |
1937 | reference to the original source section. */ | |
1938 | if (howto->pc_relative) | |
1939 | relocation += input_section->vma; | |
1940 | } | |
1941 | ||
1942 | r = _bfd_final_link_relocate (howto, | |
1943 | input_bfd, | |
1944 | input_section, | |
1945 | contents, | |
1946 | r_vaddr - input_section->vma, | |
1947 | relocation, | |
1948 | addend); | |
1949 | } | |
1950 | ||
1951 | if (r != bfd_reloc_ok) | |
1952 | { | |
1953 | switch (r) | |
1954 | { | |
1955 | default: | |
1956 | case bfd_reloc_outofrange: | |
1957 | abort (); | |
1958 | case bfd_reloc_overflow: | |
1959 | { | |
1960 | const char *name; | |
1961 | ||
1962 | if (r_extern) | |
1963 | name = sym_hashes[r_symndx]->root.root.string; | |
1964 | else | |
1965 | name = bfd_section_name (input_bfd, | |
1966 | symndx_to_section[r_symndx]); | |
1967 | if (! ((*info->callbacks->reloc_overflow) | |
1968 | (info, name, alpha_howto_table[r_type].name, | |
1969 | (bfd_vma) 0, input_bfd, input_section, | |
1970 | r_vaddr - input_section->vma))) | |
1971 | return false; | |
1972 | } | |
1973 | break; | |
1974 | } | |
1975 | } | |
1976 | } | |
1977 | ||
1978 | if (info->relocateable && adjust_addrp) | |
1979 | { | |
1980 | /* Change the address of the relocation. */ | |
1981 | bfd_h_put_64 (input_bfd, | |
1982 | (input_section->output_section->vma | |
1983 | + input_section->output_offset | |
1984 | - input_section->vma | |
1985 | + r_vaddr), | |
1986 | (bfd_byte *) ext_rel->r_vaddr); | |
1987 | } | |
1988 | ||
1989 | if (gp_usedp && gp_undefined) | |
1990 | { | |
1991 | if (! ((*info->callbacks->reloc_dangerous) | |
1992 | (info, _("GP relative relocation when GP not defined"), | |
1993 | input_bfd, input_section, r_vaddr - input_section->vma))) | |
1994 | return false; | |
1995 | /* Only give the error once per link. */ | |
1996 | gp = 4; | |
1997 | _bfd_set_gp_value (output_bfd, gp); | |
1998 | gp_undefined = false; | |
1999 | } | |
2000 | } | |
2001 | ||
2002 | if (tos != 0) | |
2003 | abort (); | |
2004 | ||
2005 | return true; | |
2006 | } | |
2007 | \f | |
2008 | /* Do final adjustments to the filehdr and the aouthdr. This routine | |
2009 | sets the dynamic bits in the file header. */ | |
2010 | ||
2011 | /*ARGSUSED*/ | |
2012 | static boolean | |
2013 | alpha_adjust_headers (abfd, fhdr, ahdr) | |
2014 | bfd *abfd; | |
2015 | struct internal_filehdr *fhdr; | |
2016 | struct internal_aouthdr *ahdr; | |
2017 | { | |
2018 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == (DYNAMIC | EXEC_P)) | |
2019 | fhdr->f_flags |= F_ALPHA_CALL_SHARED; | |
2020 | else if ((abfd->flags & DYNAMIC) != 0) | |
2021 | fhdr->f_flags |= F_ALPHA_SHARABLE; | |
2022 | return true; | |
2023 | } | |
2024 | \f | |
2025 | /* Archive handling. In OSF/1 (or Digital Unix) v3.2, Digital | |
2026 | introduced archive packing, in which the elements in an archive are | |
2027 | optionally compressed using a simple dictionary scheme. We know | |
2028 | how to read such archives, but we don't write them. */ | |
2029 | ||
2030 | #define alpha_ecoff_slurp_armap _bfd_ecoff_slurp_armap | |
2031 | #define alpha_ecoff_slurp_extended_name_table \ | |
2032 | _bfd_ecoff_slurp_extended_name_table | |
2033 | #define alpha_ecoff_construct_extended_name_table \ | |
2034 | _bfd_ecoff_construct_extended_name_table | |
2035 | #define alpha_ecoff_truncate_arname _bfd_ecoff_truncate_arname | |
2036 | #define alpha_ecoff_write_armap _bfd_ecoff_write_armap | |
2037 | #define alpha_ecoff_generic_stat_arch_elt _bfd_ecoff_generic_stat_arch_elt | |
2038 | #define alpha_ecoff_update_armap_timestamp _bfd_ecoff_update_armap_timestamp | |
2039 | ||
2040 | /* A compressed file uses this instead of ARFMAG. */ | |
2041 | ||
2042 | #define ARFZMAG "Z\012" | |
2043 | ||
2044 | /* Read an archive header. This is like the standard routine, but it | |
2045 | also accepts ARFZMAG. */ | |
2046 | ||
2047 | static PTR | |
2048 | alpha_ecoff_read_ar_hdr (abfd) | |
2049 | bfd *abfd; | |
2050 | { | |
2051 | struct areltdata *ret; | |
2052 | struct ar_hdr *h; | |
2053 | ||
2054 | ret = (struct areltdata *) _bfd_generic_read_ar_hdr_mag (abfd, ARFZMAG); | |
2055 | if (ret == NULL) | |
2056 | return NULL; | |
2057 | ||
2058 | h = (struct ar_hdr *) ret->arch_header; | |
2059 | if (strncmp (h->ar_fmag, ARFZMAG, 2) == 0) | |
2060 | { | |
2061 | bfd_byte ab[8]; | |
2062 | ||
2063 | /* This is a compressed file. We must set the size correctly. | |
2064 | The size is the eight bytes after the dummy file header. */ | |
2065 | if (bfd_seek (abfd, FILHSZ, SEEK_CUR) != 0 | |
2066 | || bfd_read (ab, 1, 8, abfd) != 8 | |
2067 | || bfd_seek (abfd, - (FILHSZ + 8), SEEK_CUR) != 0) | |
2068 | return NULL; | |
2069 | ||
2070 | ret->parsed_size = bfd_h_get_64 (abfd, ab); | |
2071 | } | |
2072 | ||
2073 | return (PTR) ret; | |
2074 | } | |
2075 | ||
2076 | /* Get an archive element at a specified file position. This is where | |
2077 | we uncompress the archive element if necessary. */ | |
2078 | ||
2079 | static bfd * | |
2080 | alpha_ecoff_get_elt_at_filepos (archive, filepos) | |
2081 | bfd *archive; | |
2082 | file_ptr filepos; | |
2083 | { | |
2084 | bfd *nbfd = NULL; | |
2085 | struct areltdata *tdata; | |
2086 | struct ar_hdr *hdr; | |
2087 | bfd_byte ab[8]; | |
2088 | bfd_size_type size; | |
2089 | bfd_byte *buf, *p; | |
2090 | struct bfd_in_memory *bim; | |
2091 | ||
2092 | nbfd = _bfd_get_elt_at_filepos (archive, filepos); | |
2093 | if (nbfd == NULL) | |
2094 | goto error_return; | |
2095 | ||
2096 | if ((nbfd->flags & BFD_IN_MEMORY) != 0) | |
2097 | { | |
2098 | /* We have already expanded this BFD. */ | |
2099 | return nbfd; | |
2100 | } | |
2101 | ||
2102 | tdata = (struct areltdata *) nbfd->arelt_data; | |
2103 | hdr = (struct ar_hdr *) tdata->arch_header; | |
2104 | if (strncmp (hdr->ar_fmag, ARFZMAG, 2) != 0) | |
2105 | return nbfd; | |
2106 | ||
2107 | /* We must uncompress this element. We do this by copying it into a | |
2108 | memory buffer, and making bfd_read and bfd_seek use that buffer. | |
2109 | This can use a lot of memory, but it's simpler than getting a | |
2110 | temporary file, making that work with the file descriptor caching | |
2111 | code, and making sure that it is deleted at all appropriate | |
2112 | times. It can be changed if it ever becomes important. */ | |
2113 | ||
2114 | /* The compressed file starts with a dummy ECOFF file header. */ | |
2115 | if (bfd_seek (nbfd, FILHSZ, SEEK_SET) != 0) | |
2116 | goto error_return; | |
2117 | ||
2118 | /* The next eight bytes are the real file size. */ | |
2119 | if (bfd_read (ab, 1, 8, nbfd) != 8) | |
2120 | goto error_return; | |
2121 | size = bfd_h_get_64 (nbfd, ab); | |
2122 | ||
2123 | if (size == 0) | |
2124 | buf = NULL; | |
2125 | else | |
2126 | { | |
2127 | bfd_size_type left; | |
2128 | bfd_byte dict[4096]; | |
2129 | unsigned int h; | |
2130 | bfd_byte b; | |
2131 | ||
2132 | buf = (bfd_byte *) bfd_alloc (nbfd, size); | |
2133 | if (buf == NULL) | |
2134 | goto error_return; | |
2135 | p = buf; | |
2136 | ||
2137 | left = size; | |
2138 | ||
2139 | /* I don't know what the next eight bytes are for. */ | |
2140 | if (bfd_read (ab, 1, 8, nbfd) != 8) | |
2141 | goto error_return; | |
2142 | ||
2143 | /* This is the uncompression algorithm. It's a simple | |
2144 | dictionary based scheme in which each character is predicted | |
2145 | by a hash of the previous three characters. A control byte | |
2146 | indicates whether the character is predicted or whether it | |
2147 | appears in the input stream; each control byte manages the | |
2148 | next eight bytes in the output stream. */ | |
2149 | memset (dict, 0, sizeof dict); | |
2150 | h = 0; | |
2151 | while (bfd_read (&b, 1, 1, nbfd) == 1) | |
2152 | { | |
2153 | unsigned int i; | |
2154 | ||
2155 | for (i = 0; i < 8; i++, b >>= 1) | |
2156 | { | |
2157 | bfd_byte n; | |
2158 | ||
2159 | if ((b & 1) == 0) | |
2160 | n = dict[h]; | |
2161 | else | |
2162 | { | |
2163 | if (! bfd_read (&n, 1, 1, nbfd)) | |
2164 | goto error_return; | |
2165 | dict[h] = n; | |
2166 | } | |
2167 | ||
2168 | *p++ = n; | |
2169 | ||
2170 | --left; | |
2171 | if (left == 0) | |
2172 | break; | |
2173 | ||
2174 | h <<= 4; | |
2175 | h ^= n; | |
2176 | h &= sizeof dict - 1; | |
2177 | } | |
2178 | ||
2179 | if (left == 0) | |
2180 | break; | |
2181 | } | |
2182 | } | |
2183 | ||
2184 | /* Now the uncompressed file contents are in buf. */ | |
2185 | bim = ((struct bfd_in_memory *) | |
2186 | bfd_alloc (nbfd, sizeof (struct bfd_in_memory))); | |
2187 | if (bim == NULL) | |
2188 | goto error_return; | |
2189 | bim->size = size; | |
2190 | bim->buffer = buf; | |
2191 | ||
2192 | nbfd->mtime_set = true; | |
2193 | nbfd->mtime = strtol (hdr->ar_date, (char **) NULL, 10); | |
2194 | ||
2195 | nbfd->flags |= BFD_IN_MEMORY; | |
2196 | nbfd->iostream = (PTR) bim; | |
2197 | BFD_ASSERT (! nbfd->cacheable); | |
2198 | ||
2199 | return nbfd; | |
2200 | ||
2201 | error_return: | |
2202 | if (nbfd != NULL) | |
2203 | bfd_close (nbfd); | |
2204 | return NULL; | |
2205 | } | |
2206 | ||
2207 | /* Open the next archived file. */ | |
2208 | ||
2209 | static bfd * | |
2210 | alpha_ecoff_openr_next_archived_file (archive, last_file) | |
2211 | bfd *archive; | |
2212 | bfd *last_file; | |
2213 | { | |
2214 | file_ptr filestart; | |
2215 | ||
2216 | if (last_file == NULL) | |
2217 | filestart = bfd_ardata (archive)->first_file_filepos; | |
2218 | else | |
2219 | { | |
2220 | struct areltdata *t; | |
2221 | struct ar_hdr *h; | |
2222 | bfd_size_type size; | |
2223 | ||
2224 | /* We can't use arelt_size here, because that uses parsed_size, | |
2225 | which is the uncompressed size. We need the compressed size. */ | |
2226 | t = (struct areltdata *) last_file->arelt_data; | |
2227 | h = (struct ar_hdr *) t->arch_header; | |
2228 | size = strtol (h->ar_size, (char **) NULL, 10); | |
2229 | ||
2230 | /* Pad to an even boundary... | |
2231 | Note that last_file->origin can be odd in the case of | |
2232 | BSD-4.4-style element with a long odd size. */ | |
2233 | filestart = last_file->origin + size; | |
2234 | filestart += filestart % 2; | |
2235 | } | |
2236 | ||
2237 | return alpha_ecoff_get_elt_at_filepos (archive, filestart); | |
2238 | } | |
2239 | ||
2240 | /* Open the archive file given an index into the armap. */ | |
2241 | ||
2242 | static bfd * | |
2243 | alpha_ecoff_get_elt_at_index (abfd, index) | |
2244 | bfd *abfd; | |
2245 | symindex index; | |
2246 | { | |
2247 | carsym *entry; | |
2248 | ||
2249 | entry = bfd_ardata (abfd)->symdefs + index; | |
2250 | return alpha_ecoff_get_elt_at_filepos (abfd, entry->file_offset); | |
2251 | } | |
2252 | \f | |
2253 | /* This is the ECOFF backend structure. The backend field of the | |
2254 | target vector points to this. */ | |
2255 | ||
2256 | static const struct ecoff_backend_data alpha_ecoff_backend_data = | |
2257 | { | |
2258 | /* COFF backend structure. */ | |
2259 | { | |
2260 | (void (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR))) bfd_void, /* aux_in */ | |
2261 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */ | |
2262 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */ | |
2263 | (unsigned (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR)))bfd_void,/*aux_out*/ | |
2264 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */ | |
2265 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */ | |
2266 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */ | |
2267 | alpha_ecoff_swap_filehdr_out, alpha_ecoff_swap_aouthdr_out, | |
2268 | alpha_ecoff_swap_scnhdr_out, | |
7b50b349 | 2269 | FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, true, false, 4, |
252b5132 RH |
2270 | alpha_ecoff_swap_filehdr_in, alpha_ecoff_swap_aouthdr_in, |
2271 | alpha_ecoff_swap_scnhdr_in, NULL, | |
2272 | alpha_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook, | |
2273 | alpha_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags, | |
2274 | _bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table, | |
7b50b349 ILT |
2275 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
2276 | NULL, NULL, NULL | |
252b5132 RH |
2277 | }, |
2278 | /* Supported architecture. */ | |
2279 | bfd_arch_alpha, | |
2280 | /* Initial portion of armap string. */ | |
2281 | "________64", | |
2282 | /* The page boundary used to align sections in a demand-paged | |
2283 | executable file. E.g., 0x1000. */ | |
2284 | 0x2000, | |
2285 | /* True if the .rdata section is part of the text segment, as on the | |
2286 | Alpha. False if .rdata is part of the data segment, as on the | |
2287 | MIPS. */ | |
2288 | true, | |
2289 | /* Bitsize of constructor entries. */ | |
2290 | 64, | |
2291 | /* Reloc to use for constructor entries. */ | |
2292 | &alpha_howto_table[ALPHA_R_REFQUAD], | |
2293 | { | |
2294 | /* Symbol table magic number. */ | |
2295 | magicSym2, | |
2296 | /* Alignment of debugging information. E.g., 4. */ | |
2297 | 8, | |
2298 | /* Sizes of external symbolic information. */ | |
2299 | sizeof (struct hdr_ext), | |
2300 | sizeof (struct dnr_ext), | |
2301 | sizeof (struct pdr_ext), | |
2302 | sizeof (struct sym_ext), | |
2303 | sizeof (struct opt_ext), | |
2304 | sizeof (struct fdr_ext), | |
2305 | sizeof (struct rfd_ext), | |
2306 | sizeof (struct ext_ext), | |
2307 | /* Functions to swap in external symbolic data. */ | |
2308 | ecoff_swap_hdr_in, | |
2309 | ecoff_swap_dnr_in, | |
2310 | ecoff_swap_pdr_in, | |
2311 | ecoff_swap_sym_in, | |
2312 | ecoff_swap_opt_in, | |
2313 | ecoff_swap_fdr_in, | |
2314 | ecoff_swap_rfd_in, | |
2315 | ecoff_swap_ext_in, | |
2316 | _bfd_ecoff_swap_tir_in, | |
2317 | _bfd_ecoff_swap_rndx_in, | |
2318 | /* Functions to swap out external symbolic data. */ | |
2319 | ecoff_swap_hdr_out, | |
2320 | ecoff_swap_dnr_out, | |
2321 | ecoff_swap_pdr_out, | |
2322 | ecoff_swap_sym_out, | |
2323 | ecoff_swap_opt_out, | |
2324 | ecoff_swap_fdr_out, | |
2325 | ecoff_swap_rfd_out, | |
2326 | ecoff_swap_ext_out, | |
2327 | _bfd_ecoff_swap_tir_out, | |
2328 | _bfd_ecoff_swap_rndx_out, | |
2329 | /* Function to read in symbolic data. */ | |
2330 | _bfd_ecoff_slurp_symbolic_info | |
2331 | }, | |
2332 | /* External reloc size. */ | |
2333 | RELSZ, | |
2334 | /* Reloc swapping functions. */ | |
2335 | alpha_ecoff_swap_reloc_in, | |
2336 | alpha_ecoff_swap_reloc_out, | |
2337 | /* Backend reloc tweaking. */ | |
2338 | alpha_adjust_reloc_in, | |
2339 | alpha_adjust_reloc_out, | |
2340 | /* Relocate section contents while linking. */ | |
2341 | alpha_relocate_section, | |
2342 | /* Do final adjustments to filehdr and aouthdr. */ | |
2343 | alpha_adjust_headers, | |
2344 | /* Read an element from an archive at a given file position. */ | |
2345 | alpha_ecoff_get_elt_at_filepos | |
2346 | }; | |
2347 | ||
2348 | /* Looking up a reloc type is Alpha specific. */ | |
2349 | #define _bfd_ecoff_bfd_reloc_type_lookup alpha_bfd_reloc_type_lookup | |
2350 | ||
2351 | /* So is getting relocated section contents. */ | |
2352 | #define _bfd_ecoff_bfd_get_relocated_section_contents \ | |
2353 | alpha_ecoff_get_relocated_section_contents | |
2354 | ||
2355 | /* Handling file windows is generic. */ | |
2356 | #define _bfd_ecoff_get_section_contents_in_window \ | |
2357 | _bfd_generic_get_section_contents_in_window | |
2358 | ||
2359 | /* Relaxing sections is generic. */ | |
2360 | #define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section | |
2361 | #define _bfd_ecoff_bfd_gc_sections bfd_generic_gc_sections | |
2362 | ||
2363 | const bfd_target ecoffalpha_little_vec = | |
2364 | { | |
2365 | "ecoff-littlealpha", /* name */ | |
2366 | bfd_target_ecoff_flavour, | |
2367 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
2368 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
2369 | ||
2370 | (HAS_RELOC | EXEC_P | /* object flags */ | |
2371 | HAS_LINENO | HAS_DEBUG | | |
2372 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), | |
2373 | ||
2374 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), | |
2375 | 0, /* leading underscore */ | |
2376 | ' ', /* ar_pad_char */ | |
2377 | 15, /* ar_max_namelen */ | |
2378 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2379 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2380 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
2381 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2382 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2383 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
2384 | ||
2385 | {_bfd_dummy_target, alpha_ecoff_object_p, /* bfd_check_format */ | |
2386 | _bfd_ecoff_archive_p, _bfd_dummy_target}, | |
2387 | {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */ | |
2388 | _bfd_generic_mkarchive, bfd_false}, | |
2389 | {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */ | |
2390 | _bfd_write_archive_contents, bfd_false}, | |
2391 | ||
2392 | BFD_JUMP_TABLE_GENERIC (_bfd_ecoff), | |
2393 | BFD_JUMP_TABLE_COPY (_bfd_ecoff), | |
2394 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
2395 | BFD_JUMP_TABLE_ARCHIVE (alpha_ecoff), | |
2396 | BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff), | |
2397 | BFD_JUMP_TABLE_RELOCS (_bfd_ecoff), | |
2398 | BFD_JUMP_TABLE_WRITE (_bfd_ecoff), | |
2399 | BFD_JUMP_TABLE_LINK (_bfd_ecoff), | |
2400 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
2401 | ||
c3c89269 NC |
2402 | NULL, |
2403 | ||
252b5132 RH |
2404 | (PTR) &alpha_ecoff_backend_data |
2405 | }; |