Commit | Line | Data |
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252b5132 | 1 | /* BFD back-end for ALPHA Extended-Coff files. |
b2747490 | 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | Modified from coff-mips.c by Steve Chamberlain <sac@cygnus.com> and |
5 | Ian Lance Taylor <ian@cygnus.com>. | |
6 | ||
7 | This file is part of BFD, the Binary File Descriptor library. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "bfd.h" | |
24 | #include "sysdep.h" | |
25 | #include "bfdlink.h" | |
26 | #include "libbfd.h" | |
27 | #include "coff/internal.h" | |
28 | #include "coff/sym.h" | |
29 | #include "coff/symconst.h" | |
30 | #include "coff/ecoff.h" | |
31 | #include "coff/alpha.h" | |
32 | #include "aout/ar.h" | |
33 | #include "libcoff.h" | |
34 | #include "libecoff.h" | |
35 | \f | |
36 | /* Prototypes for static functions. */ | |
37 | ||
38 | static const bfd_target *alpha_ecoff_object_p PARAMS ((bfd *)); | |
39 | static boolean alpha_ecoff_bad_format_hook PARAMS ((bfd *abfd, PTR filehdr)); | |
40 | static PTR alpha_ecoff_mkobject_hook PARAMS ((bfd *, PTR filehdr, PTR aouthdr)); | |
41 | static void alpha_ecoff_swap_reloc_in PARAMS ((bfd *, PTR, | |
42 | struct internal_reloc *)); | |
43 | static void alpha_ecoff_swap_reloc_out PARAMS ((bfd *, | |
44 | const struct internal_reloc *, | |
45 | PTR)); | |
46 | static void alpha_adjust_reloc_in PARAMS ((bfd *, | |
47 | const struct internal_reloc *, | |
48 | arelent *)); | |
49 | static void alpha_adjust_reloc_out PARAMS ((bfd *, const arelent *, | |
50 | struct internal_reloc *)); | |
51 | static reloc_howto_type *alpha_bfd_reloc_type_lookup | |
52 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
53 | static bfd_byte *alpha_ecoff_get_relocated_section_contents | |
54 | PARAMS ((bfd *abfd, struct bfd_link_info *, struct bfd_link_order *, | |
55 | bfd_byte *data, boolean relocateable, asymbol **symbols)); | |
56 | static bfd_vma alpha_convert_external_reloc | |
57 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, struct external_reloc *, | |
58 | struct ecoff_link_hash_entry *)); | |
59 | static boolean alpha_relocate_section PARAMS ((bfd *, struct bfd_link_info *, | |
60 | bfd *, asection *, | |
61 | bfd_byte *, PTR)); | |
62 | static boolean alpha_adjust_headers | |
63 | PARAMS ((bfd *, struct internal_filehdr *, struct internal_aouthdr *)); | |
64 | static PTR alpha_ecoff_read_ar_hdr PARAMS ((bfd *)); | |
65 | static bfd *alpha_ecoff_get_elt_at_filepos PARAMS ((bfd *, file_ptr)); | |
66 | static bfd *alpha_ecoff_openr_next_archived_file PARAMS ((bfd *, bfd *)); | |
67 | static bfd *alpha_ecoff_get_elt_at_index PARAMS ((bfd *, symindex)); | |
68 | \f | |
69 | /* ECOFF has COFF sections, but the debugging information is stored in | |
70 | a completely different format. ECOFF targets use some of the | |
71 | swapping routines from coffswap.h, and some of the generic COFF | |
72 | routines in coffgen.c, but, unlike the real COFF targets, do not | |
73 | use coffcode.h itself. | |
74 | ||
75 | Get the generic COFF swapping routines, except for the reloc, | |
76 | symbol, and lineno ones. Give them ecoff names. Define some | |
77 | accessor macros for the large sizes used for Alpha ECOFF. */ | |
78 | ||
79 | #define GET_FILEHDR_SYMPTR bfd_h_get_64 | |
80 | #define PUT_FILEHDR_SYMPTR bfd_h_put_64 | |
81 | #define GET_AOUTHDR_TSIZE bfd_h_get_64 | |
82 | #define PUT_AOUTHDR_TSIZE bfd_h_put_64 | |
83 | #define GET_AOUTHDR_DSIZE bfd_h_get_64 | |
84 | #define PUT_AOUTHDR_DSIZE bfd_h_put_64 | |
85 | #define GET_AOUTHDR_BSIZE bfd_h_get_64 | |
86 | #define PUT_AOUTHDR_BSIZE bfd_h_put_64 | |
87 | #define GET_AOUTHDR_ENTRY bfd_h_get_64 | |
88 | #define PUT_AOUTHDR_ENTRY bfd_h_put_64 | |
89 | #define GET_AOUTHDR_TEXT_START bfd_h_get_64 | |
90 | #define PUT_AOUTHDR_TEXT_START bfd_h_put_64 | |
91 | #define GET_AOUTHDR_DATA_START bfd_h_get_64 | |
92 | #define PUT_AOUTHDR_DATA_START bfd_h_put_64 | |
93 | #define GET_SCNHDR_PADDR bfd_h_get_64 | |
94 | #define PUT_SCNHDR_PADDR bfd_h_put_64 | |
95 | #define GET_SCNHDR_VADDR bfd_h_get_64 | |
96 | #define PUT_SCNHDR_VADDR bfd_h_put_64 | |
97 | #define GET_SCNHDR_SIZE bfd_h_get_64 | |
98 | #define PUT_SCNHDR_SIZE bfd_h_put_64 | |
99 | #define GET_SCNHDR_SCNPTR bfd_h_get_64 | |
100 | #define PUT_SCNHDR_SCNPTR bfd_h_put_64 | |
101 | #define GET_SCNHDR_RELPTR bfd_h_get_64 | |
102 | #define PUT_SCNHDR_RELPTR bfd_h_put_64 | |
103 | #define GET_SCNHDR_LNNOPTR bfd_h_get_64 | |
104 | #define PUT_SCNHDR_LNNOPTR bfd_h_put_64 | |
105 | ||
106 | #define ALPHAECOFF | |
107 | ||
108 | #define NO_COFF_RELOCS | |
109 | #define NO_COFF_SYMBOLS | |
110 | #define NO_COFF_LINENOS | |
111 | #define coff_swap_filehdr_in alpha_ecoff_swap_filehdr_in | |
112 | #define coff_swap_filehdr_out alpha_ecoff_swap_filehdr_out | |
113 | #define coff_swap_aouthdr_in alpha_ecoff_swap_aouthdr_in | |
114 | #define coff_swap_aouthdr_out alpha_ecoff_swap_aouthdr_out | |
115 | #define coff_swap_scnhdr_in alpha_ecoff_swap_scnhdr_in | |
116 | #define coff_swap_scnhdr_out alpha_ecoff_swap_scnhdr_out | |
117 | #include "coffswap.h" | |
118 | ||
119 | /* Get the ECOFF swapping routines. */ | |
120 | #define ECOFF_64 | |
121 | #include "ecoffswap.h" | |
122 | \f | |
123 | /* How to process the various reloc types. */ | |
124 | ||
125 | static bfd_reloc_status_type | |
126 | reloc_nil PARAMS ((bfd *, arelent *, asymbol *, PTR, | |
127 | asection *, bfd *, char **)); | |
128 | ||
129 | static bfd_reloc_status_type | |
130 | reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message) | |
b2747490 AJ |
131 | bfd *abfd ATTRIBUTE_UNUSED; |
132 | arelent *reloc ATTRIBUTE_UNUSED; | |
133 | asymbol *sym ATTRIBUTE_UNUSED; | |
134 | PTR data ATTRIBUTE_UNUSED; | |
135 | asection *sec ATTRIBUTE_UNUSED; | |
136 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
137 | char **error_message ATTRIBUTE_UNUSED; | |
252b5132 RH |
138 | { |
139 | return bfd_reloc_ok; | |
140 | } | |
141 | ||
142 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
143 | from smaller values. Start with zero, widen, *then* decrement. */ | |
144 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
145 | ||
146 | static reloc_howto_type alpha_howto_table[] = | |
147 | { | |
148 | /* Reloc type 0 is ignored by itself. However, it appears after a | |
149 | GPDISP reloc to identify the location where the low order 16 bits | |
150 | of the gp register are loaded. */ | |
151 | HOWTO (ALPHA_R_IGNORE, /* type */ | |
152 | 0, /* rightshift */ | |
153 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
154 | 8, /* bitsize */ | |
155 | true, /* pc_relative */ | |
156 | 0, /* bitpos */ | |
157 | complain_overflow_dont, /* complain_on_overflow */ | |
158 | reloc_nil, /* special_function */ | |
159 | "IGNORE", /* name */ | |
160 | true, /* partial_inplace */ | |
161 | 0, /* src_mask */ | |
162 | 0, /* dst_mask */ | |
163 | true), /* pcrel_offset */ | |
164 | ||
165 | /* A 32 bit reference to a symbol. */ | |
166 | HOWTO (ALPHA_R_REFLONG, /* type */ | |
167 | 0, /* rightshift */ | |
168 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
169 | 32, /* bitsize */ | |
170 | false, /* pc_relative */ | |
171 | 0, /* bitpos */ | |
172 | complain_overflow_bitfield, /* complain_on_overflow */ | |
173 | 0, /* special_function */ | |
174 | "REFLONG", /* name */ | |
175 | true, /* partial_inplace */ | |
176 | 0xffffffff, /* src_mask */ | |
177 | 0xffffffff, /* dst_mask */ | |
178 | false), /* pcrel_offset */ | |
179 | ||
180 | /* A 64 bit reference to a symbol. */ | |
181 | HOWTO (ALPHA_R_REFQUAD, /* type */ | |
182 | 0, /* rightshift */ | |
183 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
184 | 64, /* bitsize */ | |
185 | false, /* pc_relative */ | |
186 | 0, /* bitpos */ | |
187 | complain_overflow_bitfield, /* complain_on_overflow */ | |
188 | 0, /* special_function */ | |
189 | "REFQUAD", /* name */ | |
190 | true, /* partial_inplace */ | |
191 | MINUS_ONE, /* src_mask */ | |
192 | MINUS_ONE, /* dst_mask */ | |
193 | false), /* pcrel_offset */ | |
194 | ||
195 | /* A 32 bit GP relative offset. This is just like REFLONG except | |
196 | that when the value is used the value of the gp register will be | |
197 | added in. */ | |
198 | HOWTO (ALPHA_R_GPREL32, /* type */ | |
199 | 0, /* rightshift */ | |
200 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
201 | 32, /* bitsize */ | |
202 | false, /* pc_relative */ | |
203 | 0, /* bitpos */ | |
204 | complain_overflow_bitfield, /* complain_on_overflow */ | |
205 | 0, /* special_function */ | |
206 | "GPREL32", /* name */ | |
207 | true, /* partial_inplace */ | |
208 | 0xffffffff, /* src_mask */ | |
209 | 0xffffffff, /* dst_mask */ | |
210 | false), /* pcrel_offset */ | |
211 | ||
212 | /* Used for an instruction that refers to memory off the GP | |
213 | register. The offset is 16 bits of the 32 bit instruction. This | |
214 | reloc always seems to be against the .lita section. */ | |
215 | HOWTO (ALPHA_R_LITERAL, /* type */ | |
216 | 0, /* rightshift */ | |
217 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
218 | 16, /* bitsize */ | |
219 | false, /* pc_relative */ | |
220 | 0, /* bitpos */ | |
221 | complain_overflow_signed, /* complain_on_overflow */ | |
222 | 0, /* special_function */ | |
223 | "LITERAL", /* name */ | |
224 | true, /* partial_inplace */ | |
225 | 0xffff, /* src_mask */ | |
226 | 0xffff, /* dst_mask */ | |
227 | false), /* pcrel_offset */ | |
228 | ||
229 | /* This reloc only appears immediately following a LITERAL reloc. | |
230 | It identifies a use of the literal. It seems that the linker can | |
231 | use this to eliminate a portion of the .lita section. The symbol | |
232 | index is special: 1 means the literal address is in the base | |
233 | register of a memory format instruction; 2 means the literal | |
234 | address is in the byte offset register of a byte-manipulation | |
235 | instruction; 3 means the literal address is in the target | |
236 | register of a jsr instruction. This does not actually do any | |
237 | relocation. */ | |
238 | HOWTO (ALPHA_R_LITUSE, /* type */ | |
239 | 0, /* rightshift */ | |
240 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
241 | 32, /* bitsize */ | |
242 | false, /* pc_relative */ | |
243 | 0, /* bitpos */ | |
244 | complain_overflow_dont, /* complain_on_overflow */ | |
245 | reloc_nil, /* special_function */ | |
246 | "LITUSE", /* name */ | |
247 | false, /* partial_inplace */ | |
248 | 0, /* src_mask */ | |
249 | 0, /* dst_mask */ | |
250 | false), /* pcrel_offset */ | |
251 | ||
252 | /* Load the gp register. This is always used for a ldah instruction | |
253 | which loads the upper 16 bits of the gp register. The next reloc | |
254 | will be an IGNORE reloc which identifies the location of the lda | |
255 | instruction which loads the lower 16 bits. The symbol index of | |
256 | the GPDISP instruction appears to actually be the number of bytes | |
257 | between the ldah and lda instructions. This gives two different | |
258 | ways to determine where the lda instruction is; I don't know why | |
259 | both are used. The value to use for the relocation is the | |
260 | difference between the GP value and the current location; the | |
261 | load will always be done against a register holding the current | |
262 | address. */ | |
263 | HOWTO (ALPHA_R_GPDISP, /* type */ | |
264 | 16, /* rightshift */ | |
265 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
266 | 16, /* bitsize */ | |
267 | true, /* pc_relative */ | |
268 | 0, /* bitpos */ | |
269 | complain_overflow_dont, /* complain_on_overflow */ | |
270 | reloc_nil, /* special_function */ | |
271 | "GPDISP", /* name */ | |
272 | true, /* partial_inplace */ | |
273 | 0xffff, /* src_mask */ | |
274 | 0xffff, /* dst_mask */ | |
275 | true), /* pcrel_offset */ | |
276 | ||
277 | /* A 21 bit branch. The native assembler generates these for | |
278 | branches within the text segment, and also fills in the PC | |
279 | relative offset in the instruction. */ | |
280 | HOWTO (ALPHA_R_BRADDR, /* type */ | |
281 | 2, /* rightshift */ | |
282 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
283 | 21, /* bitsize */ | |
284 | true, /* pc_relative */ | |
285 | 0, /* bitpos */ | |
286 | complain_overflow_signed, /* complain_on_overflow */ | |
287 | 0, /* special_function */ | |
288 | "BRADDR", /* name */ | |
289 | true, /* partial_inplace */ | |
290 | 0x1fffff, /* src_mask */ | |
291 | 0x1fffff, /* dst_mask */ | |
292 | false), /* pcrel_offset */ | |
293 | ||
294 | /* A hint for a jump to a register. */ | |
295 | HOWTO (ALPHA_R_HINT, /* type */ | |
296 | 2, /* rightshift */ | |
297 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
298 | 14, /* bitsize */ | |
299 | true, /* pc_relative */ | |
300 | 0, /* bitpos */ | |
301 | complain_overflow_dont, /* complain_on_overflow */ | |
302 | 0, /* special_function */ | |
303 | "HINT", /* name */ | |
304 | true, /* partial_inplace */ | |
305 | 0x3fff, /* src_mask */ | |
306 | 0x3fff, /* dst_mask */ | |
307 | false), /* pcrel_offset */ | |
308 | ||
309 | /* 16 bit PC relative offset. */ | |
310 | HOWTO (ALPHA_R_SREL16, /* type */ | |
311 | 0, /* rightshift */ | |
312 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
313 | 16, /* bitsize */ | |
314 | true, /* pc_relative */ | |
315 | 0, /* bitpos */ | |
316 | complain_overflow_signed, /* complain_on_overflow */ | |
317 | 0, /* special_function */ | |
318 | "SREL16", /* name */ | |
319 | true, /* partial_inplace */ | |
320 | 0xffff, /* src_mask */ | |
321 | 0xffff, /* dst_mask */ | |
322 | false), /* pcrel_offset */ | |
323 | ||
324 | /* 32 bit PC relative offset. */ | |
325 | HOWTO (ALPHA_R_SREL32, /* type */ | |
326 | 0, /* rightshift */ | |
327 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
328 | 32, /* bitsize */ | |
329 | true, /* pc_relative */ | |
330 | 0, /* bitpos */ | |
331 | complain_overflow_signed, /* complain_on_overflow */ | |
332 | 0, /* special_function */ | |
333 | "SREL32", /* name */ | |
334 | true, /* partial_inplace */ | |
335 | 0xffffffff, /* src_mask */ | |
336 | 0xffffffff, /* dst_mask */ | |
337 | false), /* pcrel_offset */ | |
338 | ||
339 | /* A 64 bit PC relative offset. */ | |
340 | HOWTO (ALPHA_R_SREL64, /* type */ | |
341 | 0, /* rightshift */ | |
342 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
343 | 64, /* bitsize */ | |
344 | true, /* pc_relative */ | |
345 | 0, /* bitpos */ | |
346 | complain_overflow_signed, /* complain_on_overflow */ | |
347 | 0, /* special_function */ | |
348 | "SREL64", /* name */ | |
349 | true, /* partial_inplace */ | |
350 | MINUS_ONE, /* src_mask */ | |
351 | MINUS_ONE, /* dst_mask */ | |
352 | false), /* pcrel_offset */ | |
353 | ||
354 | /* Push a value on the reloc evaluation stack. */ | |
355 | HOWTO (ALPHA_R_OP_PUSH, /* type */ | |
356 | 0, /* rightshift */ | |
357 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
358 | 0, /* bitsize */ | |
359 | false, /* pc_relative */ | |
360 | 0, /* bitpos */ | |
361 | complain_overflow_dont, /* complain_on_overflow */ | |
362 | 0, /* special_function */ | |
363 | "OP_PUSH", /* name */ | |
364 | false, /* partial_inplace */ | |
365 | 0, /* src_mask */ | |
366 | 0, /* dst_mask */ | |
367 | false), /* pcrel_offset */ | |
368 | ||
369 | /* Store the value from the stack at the given address. Store it in | |
370 | a bitfield of size r_size starting at bit position r_offset. */ | |
371 | HOWTO (ALPHA_R_OP_STORE, /* type */ | |
372 | 0, /* rightshift */ | |
373 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
374 | 64, /* bitsize */ | |
375 | false, /* pc_relative */ | |
376 | 0, /* bitpos */ | |
377 | complain_overflow_dont, /* complain_on_overflow */ | |
378 | 0, /* special_function */ | |
379 | "OP_STORE", /* name */ | |
380 | false, /* partial_inplace */ | |
381 | 0, /* src_mask */ | |
382 | MINUS_ONE, /* dst_mask */ | |
383 | false), /* pcrel_offset */ | |
384 | ||
385 | /* Subtract the reloc address from the value on the top of the | |
386 | relocation stack. */ | |
387 | HOWTO (ALPHA_R_OP_PSUB, /* type */ | |
388 | 0, /* rightshift */ | |
389 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
390 | 0, /* bitsize */ | |
391 | false, /* pc_relative */ | |
392 | 0, /* bitpos */ | |
393 | complain_overflow_dont, /* complain_on_overflow */ | |
394 | 0, /* special_function */ | |
395 | "OP_PSUB", /* name */ | |
396 | false, /* partial_inplace */ | |
397 | 0, /* src_mask */ | |
398 | 0, /* dst_mask */ | |
399 | false), /* pcrel_offset */ | |
400 | ||
401 | /* Shift the value on the top of the relocation stack right by the | |
402 | given value. */ | |
403 | HOWTO (ALPHA_R_OP_PRSHIFT, /* type */ | |
404 | 0, /* rightshift */ | |
405 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
406 | 0, /* bitsize */ | |
407 | false, /* pc_relative */ | |
408 | 0, /* bitpos */ | |
409 | complain_overflow_dont, /* complain_on_overflow */ | |
410 | 0, /* special_function */ | |
411 | "OP_PRSHIFT", /* name */ | |
412 | false, /* partial_inplace */ | |
413 | 0, /* src_mask */ | |
414 | 0, /* dst_mask */ | |
415 | false), /* pcrel_offset */ | |
416 | ||
417 | /* Adjust the GP value for a new range in the object file. */ | |
418 | HOWTO (ALPHA_R_GPVALUE, /* type */ | |
419 | 0, /* rightshift */ | |
420 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
421 | 0, /* bitsize */ | |
422 | false, /* pc_relative */ | |
423 | 0, /* bitpos */ | |
424 | complain_overflow_dont, /* complain_on_overflow */ | |
425 | 0, /* special_function */ | |
426 | "GPVALUE", /* name */ | |
427 | false, /* partial_inplace */ | |
428 | 0, /* src_mask */ | |
429 | 0, /* dst_mask */ | |
430 | false) /* pcrel_offset */ | |
431 | }; | |
432 | \f | |
433 | /* Recognize an Alpha ECOFF file. */ | |
434 | ||
435 | static const bfd_target * | |
436 | alpha_ecoff_object_p (abfd) | |
437 | bfd *abfd; | |
438 | { | |
439 | static const bfd_target *ret; | |
440 | ||
441 | ret = coff_object_p (abfd); | |
442 | ||
443 | if (ret != NULL) | |
444 | { | |
445 | asection *sec; | |
446 | ||
447 | /* Alpha ECOFF has a .pdata section. The lnnoptr field of the | |
448 | .pdata section is the number of entries it contains. Each | |
449 | entry takes up 8 bytes. The number of entries is required | |
450 | since the section is aligned to a 16 byte boundary. When we | |
451 | link .pdata sections together, we do not want to include the | |
452 | alignment bytes. We handle this on input by faking the size | |
453 | of the .pdata section to remove the unwanted alignment bytes. | |
454 | On output we will set the lnnoptr field and force the | |
455 | alignment. */ | |
456 | sec = bfd_get_section_by_name (abfd, _PDATA); | |
457 | if (sec != (asection *) NULL) | |
458 | { | |
459 | bfd_size_type size; | |
460 | ||
461 | size = sec->line_filepos * 8; | |
462 | BFD_ASSERT (size == bfd_section_size (abfd, sec) | |
463 | || size + 8 == bfd_section_size (abfd, sec)); | |
464 | if (! bfd_set_section_size (abfd, sec, size)) | |
465 | return NULL; | |
466 | } | |
467 | } | |
468 | ||
469 | return ret; | |
470 | } | |
471 | ||
472 | /* See whether the magic number matches. */ | |
473 | ||
474 | static boolean | |
475 | alpha_ecoff_bad_format_hook (abfd, filehdr) | |
b2747490 | 476 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
477 | PTR filehdr; |
478 | { | |
479 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
480 | ||
481 | if (ALPHA_ECOFF_BADMAG (*internal_f)) | |
482 | return false; | |
483 | ||
484 | return true; | |
485 | } | |
486 | ||
487 | /* This is a hook called by coff_real_object_p to create any backend | |
488 | specific information. */ | |
489 | ||
490 | static PTR | |
491 | alpha_ecoff_mkobject_hook (abfd, filehdr, aouthdr) | |
492 | bfd *abfd; | |
493 | PTR filehdr; | |
494 | PTR aouthdr; | |
495 | { | |
496 | PTR ecoff; | |
497 | ||
498 | ecoff = _bfd_ecoff_mkobject_hook (abfd, filehdr, aouthdr); | |
499 | ||
500 | if (ecoff != NULL) | |
501 | { | |
502 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
503 | ||
504 | /* Set additional BFD flags according to the object type from the | |
505 | machine specific file header flags. */ | |
506 | switch (internal_f->f_flags & F_ALPHA_OBJECT_TYPE_MASK) | |
507 | { | |
508 | case F_ALPHA_SHARABLE: | |
509 | abfd->flags |= DYNAMIC; | |
510 | break; | |
511 | case F_ALPHA_CALL_SHARED: | |
512 | /* Always executable if using shared libraries as the run time | |
513 | loader might resolve undefined references. */ | |
514 | abfd->flags |= (DYNAMIC | EXEC_P); | |
515 | break; | |
516 | } | |
517 | } | |
518 | return ecoff; | |
519 | } | |
520 | \f | |
521 | /* Reloc handling. */ | |
522 | ||
523 | /* Swap a reloc in. */ | |
524 | ||
525 | static void | |
526 | alpha_ecoff_swap_reloc_in (abfd, ext_ptr, intern) | |
527 | bfd *abfd; | |
528 | PTR ext_ptr; | |
529 | struct internal_reloc *intern; | |
530 | { | |
531 | const RELOC *ext = (RELOC *) ext_ptr; | |
532 | ||
533 | intern->r_vaddr = bfd_h_get_64 (abfd, (bfd_byte *) ext->r_vaddr); | |
534 | intern->r_symndx = bfd_h_get_32 (abfd, (bfd_byte *) ext->r_symndx); | |
535 | ||
536 | BFD_ASSERT (bfd_header_little_endian (abfd)); | |
537 | ||
538 | intern->r_type = ((ext->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
539 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
540 | intern->r_extern = (ext->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
541 | intern->r_offset = ((ext->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
542 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
543 | /* Ignored the reserved bits. */ | |
544 | intern->r_size = ((ext->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
545 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
546 | ||
547 | if (intern->r_type == ALPHA_R_LITUSE | |
548 | || intern->r_type == ALPHA_R_GPDISP) | |
549 | { | |
550 | /* Handle the LITUSE and GPDISP relocs specially. Its symndx | |
551 | value is not actually a symbol index, but is instead a | |
552 | special code. We put the code in the r_size field, and | |
553 | clobber the symndx. */ | |
554 | if (intern->r_size != 0) | |
555 | abort (); | |
556 | intern->r_size = intern->r_symndx; | |
557 | intern->r_symndx = RELOC_SECTION_NONE; | |
558 | } | |
559 | else if (intern->r_type == ALPHA_R_IGNORE) | |
560 | { | |
561 | /* The IGNORE reloc generally follows a GPDISP reloc, and is | |
562 | against the .lita section. The section is irrelevant. */ | |
563 | if (! intern->r_extern && | |
564 | intern->r_symndx == RELOC_SECTION_ABS) | |
565 | abort (); | |
566 | if (! intern->r_extern && intern->r_symndx == RELOC_SECTION_LITA) | |
567 | intern->r_symndx = RELOC_SECTION_ABS; | |
568 | } | |
569 | } | |
570 | ||
571 | /* Swap a reloc out. */ | |
572 | ||
573 | static void | |
574 | alpha_ecoff_swap_reloc_out (abfd, intern, dst) | |
575 | bfd *abfd; | |
576 | const struct internal_reloc *intern; | |
577 | PTR dst; | |
578 | { | |
579 | RELOC *ext = (RELOC *) dst; | |
580 | long symndx; | |
581 | unsigned char size; | |
582 | ||
583 | /* Undo the hackery done in swap_reloc_in. */ | |
584 | if (intern->r_type == ALPHA_R_LITUSE | |
585 | || intern->r_type == ALPHA_R_GPDISP) | |
586 | { | |
587 | symndx = intern->r_size; | |
588 | size = 0; | |
589 | } | |
590 | else if (intern->r_type == ALPHA_R_IGNORE | |
591 | && ! intern->r_extern | |
592 | && intern->r_symndx == RELOC_SECTION_ABS) | |
593 | { | |
594 | symndx = RELOC_SECTION_LITA; | |
595 | size = intern->r_size; | |
596 | } | |
597 | else | |
598 | { | |
599 | symndx = intern->r_symndx; | |
600 | size = intern->r_size; | |
601 | } | |
602 | ||
603 | BFD_ASSERT (intern->r_extern | |
604 | || (intern->r_symndx >= 0 && intern->r_symndx <= 14)); | |
605 | ||
606 | bfd_h_put_64 (abfd, intern->r_vaddr, (bfd_byte *) ext->r_vaddr); | |
607 | bfd_h_put_32 (abfd, symndx, (bfd_byte *) ext->r_symndx); | |
608 | ||
609 | BFD_ASSERT (bfd_header_little_endian (abfd)); | |
610 | ||
611 | ext->r_bits[0] = ((intern->r_type << RELOC_BITS0_TYPE_SH_LITTLE) | |
612 | & RELOC_BITS0_TYPE_LITTLE); | |
613 | ext->r_bits[1] = ((intern->r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0) | |
614 | | ((intern->r_offset << RELOC_BITS1_OFFSET_SH_LITTLE) | |
615 | & RELOC_BITS1_OFFSET_LITTLE)); | |
616 | ext->r_bits[2] = 0; | |
617 | ext->r_bits[3] = ((size << RELOC_BITS3_SIZE_SH_LITTLE) | |
618 | & RELOC_BITS3_SIZE_LITTLE); | |
619 | } | |
620 | ||
621 | /* Finish canonicalizing a reloc. Part of this is generic to all | |
622 | ECOFF targets, and that part is in ecoff.c. The rest is done in | |
623 | this backend routine. It must fill in the howto field. */ | |
624 | ||
625 | static void | |
626 | alpha_adjust_reloc_in (abfd, intern, rptr) | |
627 | bfd *abfd; | |
628 | const struct internal_reloc *intern; | |
629 | arelent *rptr; | |
630 | { | |
631 | if (intern->r_type > ALPHA_R_GPVALUE) | |
632 | abort (); | |
633 | ||
634 | switch (intern->r_type) | |
635 | { | |
636 | case ALPHA_R_BRADDR: | |
637 | case ALPHA_R_SREL16: | |
638 | case ALPHA_R_SREL32: | |
639 | case ALPHA_R_SREL64: | |
640 | /* This relocs appear to be fully resolved when they are against | |
641 | internal symbols. Against external symbols, BRADDR at least | |
642 | appears to be resolved against the next instruction. */ | |
643 | if (! intern->r_extern) | |
644 | rptr->addend = 0; | |
645 | else | |
646 | rptr->addend = - (intern->r_vaddr + 4); | |
647 | break; | |
648 | ||
649 | case ALPHA_R_GPREL32: | |
650 | case ALPHA_R_LITERAL: | |
651 | /* Copy the gp value for this object file into the addend, to | |
652 | ensure that we are not confused by the linker. */ | |
653 | if (! intern->r_extern) | |
654 | rptr->addend += ecoff_data (abfd)->gp; | |
655 | break; | |
656 | ||
657 | case ALPHA_R_LITUSE: | |
658 | case ALPHA_R_GPDISP: | |
659 | /* The LITUSE and GPDISP relocs do not use a symbol, or an | |
660 | addend, but they do use a special code. Put this code in the | |
661 | addend field. */ | |
662 | rptr->addend = intern->r_size; | |
663 | break; | |
664 | ||
665 | case ALPHA_R_OP_STORE: | |
666 | /* The STORE reloc needs the size and offset fields. We store | |
667 | them in the addend. */ | |
668 | BFD_ASSERT (intern->r_offset <= 256 && intern->r_size <= 256); | |
669 | rptr->addend = (intern->r_offset << 8) + intern->r_size; | |
670 | break; | |
671 | ||
672 | case ALPHA_R_OP_PUSH: | |
673 | case ALPHA_R_OP_PSUB: | |
674 | case ALPHA_R_OP_PRSHIFT: | |
675 | /* The PUSH, PSUB and PRSHIFT relocs do not actually use an | |
676 | address. I believe that the address supplied is really an | |
677 | addend. */ | |
678 | rptr->addend = intern->r_vaddr; | |
679 | break; | |
680 | ||
681 | case ALPHA_R_GPVALUE: | |
682 | /* Set the addend field to the new GP value. */ | |
683 | rptr->addend = intern->r_symndx + ecoff_data (abfd)->gp; | |
684 | break; | |
685 | ||
686 | case ALPHA_R_IGNORE: | |
687 | /* If the type is ALPHA_R_IGNORE, make sure this is a reference | |
688 | to the absolute section so that the reloc is ignored. For | |
689 | some reason the address of this reloc type is not adjusted by | |
690 | the section vma. We record the gp value for this object file | |
691 | here, for convenience when doing the GPDISP relocation. */ | |
692 | rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
693 | rptr->address = intern->r_vaddr; | |
694 | rptr->addend = ecoff_data (abfd)->gp; | |
695 | break; | |
696 | ||
697 | default: | |
698 | break; | |
699 | } | |
700 | ||
701 | rptr->howto = &alpha_howto_table[intern->r_type]; | |
702 | } | |
703 | ||
704 | /* When writing out a reloc we need to pull some values back out of | |
705 | the addend field into the reloc. This is roughly the reverse of | |
706 | alpha_adjust_reloc_in, except that there are several changes we do | |
707 | not need to undo. */ | |
708 | ||
709 | static void | |
710 | alpha_adjust_reloc_out (abfd, rel, intern) | |
b2747490 | 711 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
712 | const arelent *rel; |
713 | struct internal_reloc *intern; | |
714 | { | |
715 | switch (intern->r_type) | |
716 | { | |
717 | case ALPHA_R_LITUSE: | |
718 | case ALPHA_R_GPDISP: | |
719 | intern->r_size = rel->addend; | |
720 | break; | |
721 | ||
722 | case ALPHA_R_OP_STORE: | |
723 | intern->r_size = rel->addend & 0xff; | |
724 | intern->r_offset = (rel->addend >> 8) & 0xff; | |
725 | break; | |
726 | ||
727 | case ALPHA_R_OP_PUSH: | |
728 | case ALPHA_R_OP_PSUB: | |
729 | case ALPHA_R_OP_PRSHIFT: | |
730 | intern->r_vaddr = rel->addend; | |
731 | break; | |
732 | ||
733 | case ALPHA_R_IGNORE: | |
734 | intern->r_vaddr = rel->address; | |
735 | break; | |
736 | ||
737 | default: | |
738 | break; | |
739 | } | |
740 | } | |
741 | ||
742 | /* The size of the stack for the relocation evaluator. */ | |
743 | #define RELOC_STACKSIZE (10) | |
744 | ||
745 | /* Alpha ECOFF relocs have a built in expression evaluator as well as | |
746 | other interdependencies. Rather than use a bunch of special | |
747 | functions and global variables, we use a single routine to do all | |
748 | the relocation for a section. I haven't yet worked out how the | |
749 | assembler is going to handle this. */ | |
750 | ||
751 | static bfd_byte * | |
752 | alpha_ecoff_get_relocated_section_contents (abfd, link_info, link_order, | |
753 | data, relocateable, symbols) | |
754 | bfd *abfd; | |
755 | struct bfd_link_info *link_info; | |
756 | struct bfd_link_order *link_order; | |
757 | bfd_byte *data; | |
758 | boolean relocateable; | |
759 | asymbol **symbols; | |
760 | { | |
761 | bfd *input_bfd = link_order->u.indirect.section->owner; | |
762 | asection *input_section = link_order->u.indirect.section; | |
763 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); | |
764 | arelent **reloc_vector = NULL; | |
765 | long reloc_count; | |
766 | bfd *output_bfd = relocateable ? abfd : (bfd *) NULL; | |
767 | bfd_vma gp; | |
768 | boolean gp_undefined; | |
769 | bfd_vma stack[RELOC_STACKSIZE]; | |
770 | int tos = 0; | |
771 | ||
772 | if (reloc_size < 0) | |
773 | goto error_return; | |
774 | reloc_vector = (arelent **) bfd_malloc (reloc_size); | |
775 | if (reloc_vector == NULL && reloc_size != 0) | |
776 | goto error_return; | |
777 | ||
778 | if (! bfd_get_section_contents (input_bfd, input_section, data, | |
779 | (file_ptr) 0, input_section->_raw_size)) | |
780 | goto error_return; | |
781 | ||
782 | /* The section size is not going to change. */ | |
783 | input_section->_cooked_size = input_section->_raw_size; | |
784 | input_section->reloc_done = true; | |
785 | ||
786 | reloc_count = bfd_canonicalize_reloc (input_bfd, input_section, | |
787 | reloc_vector, symbols); | |
788 | if (reloc_count < 0) | |
789 | goto error_return; | |
790 | if (reloc_count == 0) | |
791 | goto successful_return; | |
792 | ||
793 | /* Get the GP value for the output BFD. */ | |
794 | gp_undefined = false; | |
795 | gp = _bfd_get_gp_value (abfd); | |
796 | if (gp == 0) | |
797 | { | |
798 | if (relocateable != false) | |
799 | { | |
800 | asection *sec; | |
801 | bfd_vma lo; | |
802 | ||
803 | /* Make up a value. */ | |
804 | lo = (bfd_vma) -1; | |
805 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
806 | { | |
807 | if (sec->vma < lo | |
808 | && (strcmp (sec->name, ".sbss") == 0 | |
809 | || strcmp (sec->name, ".sdata") == 0 | |
810 | || strcmp (sec->name, ".lit4") == 0 | |
811 | || strcmp (sec->name, ".lit8") == 0 | |
812 | || strcmp (sec->name, ".lita") == 0)) | |
813 | lo = sec->vma; | |
814 | } | |
815 | gp = lo + 0x8000; | |
816 | _bfd_set_gp_value (abfd, gp); | |
817 | } | |
818 | else | |
819 | { | |
820 | struct bfd_link_hash_entry *h; | |
821 | ||
822 | h = bfd_link_hash_lookup (link_info->hash, "_gp", false, false, | |
823 | true); | |
824 | if (h == (struct bfd_link_hash_entry *) NULL | |
825 | || h->type != bfd_link_hash_defined) | |
826 | gp_undefined = true; | |
827 | else | |
828 | { | |
829 | gp = (h->u.def.value | |
830 | + h->u.def.section->output_section->vma | |
831 | + h->u.def.section->output_offset); | |
832 | _bfd_set_gp_value (abfd, gp); | |
833 | } | |
834 | } | |
835 | } | |
836 | ||
837 | for (; *reloc_vector != (arelent *) NULL; reloc_vector++) | |
838 | { | |
839 | arelent *rel; | |
840 | bfd_reloc_status_type r; | |
841 | char *err; | |
842 | ||
843 | rel = *reloc_vector; | |
844 | r = bfd_reloc_ok; | |
845 | switch (rel->howto->type) | |
846 | { | |
847 | case ALPHA_R_IGNORE: | |
848 | rel->address += input_section->output_offset; | |
849 | break; | |
850 | ||
851 | case ALPHA_R_REFLONG: | |
852 | case ALPHA_R_REFQUAD: | |
853 | case ALPHA_R_BRADDR: | |
854 | case ALPHA_R_HINT: | |
855 | case ALPHA_R_SREL16: | |
856 | case ALPHA_R_SREL32: | |
857 | case ALPHA_R_SREL64: | |
858 | if (relocateable | |
859 | && ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
860 | { | |
861 | rel->address += input_section->output_offset; | |
862 | break; | |
863 | } | |
864 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
865 | output_bfd, &err); | |
866 | break; | |
867 | ||
868 | case ALPHA_R_GPREL32: | |
869 | /* This relocation is used in a switch table. It is a 32 | |
870 | bit offset from the current GP value. We must adjust it | |
871 | by the different between the original GP value and the | |
872 | current GP value. The original GP value is stored in the | |
873 | addend. We adjust the addend and let | |
874 | bfd_perform_relocation finish the job. */ | |
875 | rel->addend -= gp; | |
876 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
877 | output_bfd, &err); | |
878 | if (r == bfd_reloc_ok && gp_undefined) | |
879 | { | |
880 | r = bfd_reloc_dangerous; | |
881 | err = (char *) _("GP relative relocation used when GP not defined"); | |
882 | } | |
883 | break; | |
884 | ||
885 | case ALPHA_R_LITERAL: | |
886 | /* This is a reference to a literal value, generally | |
887 | (always?) in the .lita section. This is a 16 bit GP | |
888 | relative relocation. Sometimes the subsequent reloc is a | |
889 | LITUSE reloc, which indicates how this reloc is used. | |
890 | This sometimes permits rewriting the two instructions | |
891 | referred to by the LITERAL and the LITUSE into different | |
892 | instructions which do not refer to .lita. This can save | |
893 | a memory reference, and permits removing a value from | |
894 | .lita thus saving GP relative space. | |
895 | ||
896 | We do not these optimizations. To do them we would need | |
897 | to arrange to link the .lita section first, so that by | |
898 | the time we got here we would know the final values to | |
899 | use. This would not be particularly difficult, but it is | |
900 | not currently implemented. */ | |
901 | ||
902 | { | |
903 | unsigned long insn; | |
904 | ||
905 | /* I believe that the LITERAL reloc will only apply to a | |
906 | ldq or ldl instruction, so check my assumption. */ | |
907 | insn = bfd_get_32 (input_bfd, data + rel->address); | |
908 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 | |
909 | || ((insn >> 26) & 0x3f) == 0x28); | |
910 | ||
911 | rel->addend -= gp; | |
912 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
913 | output_bfd, &err); | |
914 | if (r == bfd_reloc_ok && gp_undefined) | |
915 | { | |
916 | r = bfd_reloc_dangerous; | |
917 | err = | |
918 | (char *) _("GP relative relocation used when GP not defined"); | |
919 | } | |
920 | } | |
921 | break; | |
922 | ||
923 | case ALPHA_R_LITUSE: | |
924 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
925 | does not cause anything to happen, itself. */ | |
926 | rel->address += input_section->output_offset; | |
927 | break; | |
346ceb11 | 928 | |
252b5132 RH |
929 | case ALPHA_R_GPDISP: |
930 | /* This marks the ldah of an ldah/lda pair which loads the | |
931 | gp register with the difference of the gp value and the | |
932 | current location. The second of the pair is r_size bytes | |
933 | ahead; it used to be marked with an ALPHA_R_IGNORE reloc, | |
934 | but that no longer happens in OSF/1 3.2. */ | |
935 | { | |
936 | unsigned long insn1, insn2; | |
937 | bfd_vma addend; | |
938 | ||
939 | /* Get the two instructions. */ | |
940 | insn1 = bfd_get_32 (input_bfd, data + rel->address); | |
941 | insn2 = bfd_get_32 (input_bfd, data + rel->address + rel->addend); | |
942 | ||
943 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
944 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
945 | ||
946 | /* Get the existing addend. We must account for the sign | |
947 | extension done by lda and ldah. */ | |
948 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
949 | if (insn1 & 0x8000) | |
950 | { | |
951 | addend -= 0x80000000; | |
952 | addend -= 0x80000000; | |
953 | } | |
954 | if (insn2 & 0x8000) | |
955 | addend -= 0x10000; | |
956 | ||
957 | /* The existing addend includes the different between the | |
958 | gp of the input BFD and the address in the input BFD. | |
959 | Subtract this out. */ | |
960 | addend -= (ecoff_data (input_bfd)->gp | |
961 | - (input_section->vma + rel->address)); | |
962 | ||
963 | /* Now add in the final gp value, and subtract out the | |
964 | final address. */ | |
965 | addend += (gp | |
966 | - (input_section->output_section->vma | |
967 | + input_section->output_offset | |
968 | + rel->address)); | |
969 | ||
970 | /* Change the instructions, accounting for the sign | |
971 | extension, and write them out. */ | |
972 | if (addend & 0x8000) | |
973 | addend += 0x10000; | |
974 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
975 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
976 | ||
977 | bfd_put_32 (input_bfd, (bfd_vma) insn1, data + rel->address); | |
978 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
979 | data + rel->address + rel->addend); | |
980 | ||
981 | rel->address += input_section->output_offset; | |
982 | } | |
983 | break; | |
346ceb11 | 984 | |
252b5132 RH |
985 | case ALPHA_R_OP_PUSH: |
986 | /* Push a value on the reloc evaluation stack. */ | |
987 | { | |
988 | asymbol *symbol; | |
989 | bfd_vma relocation; | |
990 | ||
991 | if (relocateable) | |
992 | { | |
993 | rel->address += input_section->output_offset; | |
994 | break; | |
995 | } | |
996 | ||
997 | /* Figure out the relocation of this symbol. */ | |
998 | symbol = *rel->sym_ptr_ptr; | |
999 | ||
1000 | if (bfd_is_und_section (symbol->section)) | |
1001 | r = bfd_reloc_undefined; | |
1002 | ||
1003 | if (bfd_is_com_section (symbol->section)) | |
1004 | relocation = 0; | |
1005 | else | |
1006 | relocation = symbol->value; | |
1007 | relocation += symbol->section->output_section->vma; | |
1008 | relocation += symbol->section->output_offset; | |
1009 | relocation += rel->addend; | |
1010 | ||
1011 | if (tos >= RELOC_STACKSIZE) | |
1012 | abort (); | |
1013 | ||
1014 | stack[tos++] = relocation; | |
1015 | } | |
1016 | break; | |
1017 | ||
1018 | case ALPHA_R_OP_STORE: | |
1019 | /* Store a value from the reloc stack into a bitfield. */ | |
1020 | { | |
1021 | bfd_vma val; | |
1022 | int offset, size; | |
1023 | ||
1024 | if (relocateable) | |
1025 | { | |
1026 | rel->address += input_section->output_offset; | |
1027 | break; | |
1028 | } | |
1029 | ||
1030 | if (tos == 0) | |
1031 | abort (); | |
1032 | ||
1033 | /* The offset and size for this reloc are encoded into the | |
1034 | addend field by alpha_adjust_reloc_in. */ | |
1035 | offset = (rel->addend >> 8) & 0xff; | |
1036 | size = rel->addend & 0xff; | |
1037 | ||
1038 | val = bfd_get_64 (abfd, data + rel->address); | |
1039 | val &=~ (((1 << size) - 1) << offset); | |
1040 | val |= (stack[--tos] & ((1 << size) - 1)) << offset; | |
1041 | bfd_put_64 (abfd, val, data + rel->address); | |
1042 | } | |
1043 | break; | |
1044 | ||
1045 | case ALPHA_R_OP_PSUB: | |
1046 | /* Subtract a value from the top of the stack. */ | |
1047 | { | |
1048 | asymbol *symbol; | |
1049 | bfd_vma relocation; | |
1050 | ||
1051 | if (relocateable) | |
1052 | { | |
1053 | rel->address += input_section->output_offset; | |
1054 | break; | |
1055 | } | |
1056 | ||
1057 | /* Figure out the relocation of this symbol. */ | |
1058 | symbol = *rel->sym_ptr_ptr; | |
1059 | ||
1060 | if (bfd_is_und_section (symbol->section)) | |
1061 | r = bfd_reloc_undefined; | |
1062 | ||
1063 | if (bfd_is_com_section (symbol->section)) | |
1064 | relocation = 0; | |
1065 | else | |
1066 | relocation = symbol->value; | |
1067 | relocation += symbol->section->output_section->vma; | |
1068 | relocation += symbol->section->output_offset; | |
1069 | relocation += rel->addend; | |
1070 | ||
1071 | if (tos == 0) | |
1072 | abort (); | |
1073 | ||
1074 | stack[tos - 1] -= relocation; | |
1075 | } | |
1076 | break; | |
1077 | ||
1078 | case ALPHA_R_OP_PRSHIFT: | |
1079 | /* Shift the value on the top of the stack. */ | |
1080 | { | |
1081 | asymbol *symbol; | |
1082 | bfd_vma relocation; | |
1083 | ||
1084 | if (relocateable) | |
1085 | { | |
1086 | rel->address += input_section->output_offset; | |
1087 | break; | |
1088 | } | |
1089 | ||
1090 | /* Figure out the relocation of this symbol. */ | |
1091 | symbol = *rel->sym_ptr_ptr; | |
1092 | ||
1093 | if (bfd_is_und_section (symbol->section)) | |
1094 | r = bfd_reloc_undefined; | |
1095 | ||
1096 | if (bfd_is_com_section (symbol->section)) | |
1097 | relocation = 0; | |
1098 | else | |
1099 | relocation = symbol->value; | |
1100 | relocation += symbol->section->output_section->vma; | |
1101 | relocation += symbol->section->output_offset; | |
1102 | relocation += rel->addend; | |
1103 | ||
1104 | if (tos == 0) | |
1105 | abort (); | |
1106 | ||
1107 | stack[tos - 1] >>= relocation; | |
1108 | } | |
1109 | break; | |
346ceb11 | 1110 | |
252b5132 RH |
1111 | case ALPHA_R_GPVALUE: |
1112 | /* I really don't know if this does the right thing. */ | |
1113 | gp = rel->addend; | |
1114 | gp_undefined = false; | |
1115 | break; | |
1116 | ||
1117 | default: | |
1118 | abort (); | |
1119 | } | |
1120 | ||
1121 | if (relocateable) | |
1122 | { | |
1123 | asection *os = input_section->output_section; | |
1124 | ||
1125 | /* A partial link, so keep the relocs. */ | |
1126 | os->orelocation[os->reloc_count] = rel; | |
1127 | os->reloc_count++; | |
1128 | } | |
1129 | ||
346ceb11 | 1130 | if (r != bfd_reloc_ok) |
252b5132 RH |
1131 | { |
1132 | switch (r) | |
1133 | { | |
1134 | case bfd_reloc_undefined: | |
1135 | if (! ((*link_info->callbacks->undefined_symbol) | |
1136 | (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr), | |
5cc7c785 | 1137 | input_bfd, input_section, rel->address, true))) |
252b5132 RH |
1138 | goto error_return; |
1139 | break; | |
346ceb11 | 1140 | case bfd_reloc_dangerous: |
252b5132 RH |
1141 | if (! ((*link_info->callbacks->reloc_dangerous) |
1142 | (link_info, err, input_bfd, input_section, | |
1143 | rel->address))) | |
1144 | goto error_return; | |
1145 | break; | |
1146 | case bfd_reloc_overflow: | |
1147 | if (! ((*link_info->callbacks->reloc_overflow) | |
1148 | (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr), | |
1149 | rel->howto->name, rel->addend, input_bfd, | |
1150 | input_section, rel->address))) | |
1151 | goto error_return; | |
1152 | break; | |
1153 | case bfd_reloc_outofrange: | |
1154 | default: | |
1155 | abort (); | |
1156 | break; | |
1157 | } | |
1158 | } | |
1159 | } | |
1160 | ||
1161 | if (tos != 0) | |
1162 | abort (); | |
1163 | ||
1164 | successful_return: | |
1165 | if (reloc_vector != NULL) | |
1166 | free (reloc_vector); | |
1167 | return data; | |
1168 | ||
1169 | error_return: | |
1170 | if (reloc_vector != NULL) | |
1171 | free (reloc_vector); | |
1172 | return NULL; | |
1173 | } | |
1174 | ||
1175 | /* Get the howto structure for a generic reloc type. */ | |
1176 | ||
1177 | static reloc_howto_type * | |
1178 | alpha_bfd_reloc_type_lookup (abfd, code) | |
b2747490 | 1179 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1180 | bfd_reloc_code_real_type code; |
1181 | { | |
1182 | int alpha_type; | |
1183 | ||
1184 | switch (code) | |
1185 | { | |
1186 | case BFD_RELOC_32: | |
1187 | alpha_type = ALPHA_R_REFLONG; | |
1188 | break; | |
1189 | case BFD_RELOC_64: | |
1190 | case BFD_RELOC_CTOR: | |
1191 | alpha_type = ALPHA_R_REFQUAD; | |
1192 | break; | |
1193 | case BFD_RELOC_GPREL32: | |
1194 | alpha_type = ALPHA_R_GPREL32; | |
1195 | break; | |
1196 | case BFD_RELOC_ALPHA_LITERAL: | |
1197 | alpha_type = ALPHA_R_LITERAL; | |
1198 | break; | |
1199 | case BFD_RELOC_ALPHA_LITUSE: | |
1200 | alpha_type = ALPHA_R_LITUSE; | |
1201 | break; | |
1202 | case BFD_RELOC_ALPHA_GPDISP_HI16: | |
1203 | alpha_type = ALPHA_R_GPDISP; | |
1204 | break; | |
1205 | case BFD_RELOC_ALPHA_GPDISP_LO16: | |
1206 | alpha_type = ALPHA_R_IGNORE; | |
1207 | break; | |
1208 | case BFD_RELOC_23_PCREL_S2: | |
1209 | alpha_type = ALPHA_R_BRADDR; | |
1210 | break; | |
1211 | case BFD_RELOC_ALPHA_HINT: | |
1212 | alpha_type = ALPHA_R_HINT; | |
1213 | break; | |
1214 | case BFD_RELOC_16_PCREL: | |
1215 | alpha_type = ALPHA_R_SREL16; | |
1216 | break; | |
1217 | case BFD_RELOC_32_PCREL: | |
1218 | alpha_type = ALPHA_R_SREL32; | |
1219 | break; | |
1220 | case BFD_RELOC_64_PCREL: | |
1221 | alpha_type = ALPHA_R_SREL64; | |
1222 | break; | |
1223 | #if 0 | |
1224 | case ???: | |
1225 | alpha_type = ALPHA_R_OP_PUSH; | |
1226 | break; | |
1227 | case ???: | |
1228 | alpha_type = ALPHA_R_OP_STORE; | |
1229 | break; | |
1230 | case ???: | |
1231 | alpha_type = ALPHA_R_OP_PSUB; | |
1232 | break; | |
1233 | case ???: | |
1234 | alpha_type = ALPHA_R_OP_PRSHIFT; | |
1235 | break; | |
1236 | case ???: | |
1237 | alpha_type = ALPHA_R_GPVALUE; | |
1238 | break; | |
1239 | #endif | |
1240 | default: | |
1241 | return (reloc_howto_type *) NULL; | |
1242 | } | |
1243 | ||
1244 | return &alpha_howto_table[alpha_type]; | |
1245 | } | |
1246 | \f | |
1247 | /* A helper routine for alpha_relocate_section which converts an | |
1248 | external reloc when generating relocateable output. Returns the | |
1249 | relocation amount. */ | |
1250 | ||
1251 | static bfd_vma | |
1252 | alpha_convert_external_reloc (output_bfd, info, input_bfd, ext_rel, h) | |
b2747490 | 1253 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1254 | struct bfd_link_info *info; |
1255 | bfd *input_bfd; | |
1256 | struct external_reloc *ext_rel; | |
1257 | struct ecoff_link_hash_entry *h; | |
1258 | { | |
1259 | unsigned long r_symndx; | |
1260 | bfd_vma relocation; | |
1261 | ||
1262 | BFD_ASSERT (info->relocateable); | |
1263 | ||
1264 | if (h->root.type == bfd_link_hash_defined | |
1265 | || h->root.type == bfd_link_hash_defweak) | |
1266 | { | |
1267 | asection *hsec; | |
1268 | const char *name; | |
1269 | ||
1270 | /* This symbol is defined in the output. Convert the reloc from | |
1271 | being against the symbol to being against the section. */ | |
1272 | ||
1273 | /* Clear the r_extern bit. */ | |
1274 | ext_rel->r_bits[1] &=~ RELOC_BITS1_EXTERN_LITTLE; | |
1275 | ||
1276 | /* Compute a new r_symndx value. */ | |
1277 | hsec = h->root.u.def.section; | |
1278 | name = bfd_get_section_name (output_bfd, hsec->output_section); | |
1279 | ||
1280 | r_symndx = -1; | |
1281 | switch (name[1]) | |
1282 | { | |
1283 | case 'A': | |
1284 | if (strcmp (name, "*ABS*") == 0) | |
1285 | r_symndx = RELOC_SECTION_ABS; | |
1286 | break; | |
1287 | case 'b': | |
1288 | if (strcmp (name, ".bss") == 0) | |
1289 | r_symndx = RELOC_SECTION_BSS; | |
1290 | break; | |
1291 | case 'd': | |
1292 | if (strcmp (name, ".data") == 0) | |
1293 | r_symndx = RELOC_SECTION_DATA; | |
1294 | break; | |
1295 | case 'f': | |
1296 | if (strcmp (name, ".fini") == 0) | |
1297 | r_symndx = RELOC_SECTION_FINI; | |
1298 | break; | |
1299 | case 'i': | |
1300 | if (strcmp (name, ".init") == 0) | |
1301 | r_symndx = RELOC_SECTION_INIT; | |
1302 | break; | |
1303 | case 'l': | |
1304 | if (strcmp (name, ".lita") == 0) | |
1305 | r_symndx = RELOC_SECTION_LITA; | |
1306 | else if (strcmp (name, ".lit8") == 0) | |
1307 | r_symndx = RELOC_SECTION_LIT8; | |
1308 | else if (strcmp (name, ".lit4") == 0) | |
1309 | r_symndx = RELOC_SECTION_LIT4; | |
1310 | break; | |
1311 | case 'p': | |
1312 | if (strcmp (name, ".pdata") == 0) | |
1313 | r_symndx = RELOC_SECTION_PDATA; | |
1314 | break; | |
1315 | case 'r': | |
1316 | if (strcmp (name, ".rdata") == 0) | |
1317 | r_symndx = RELOC_SECTION_RDATA; | |
1318 | else if (strcmp (name, ".rconst") == 0) | |
1319 | r_symndx = RELOC_SECTION_RCONST; | |
1320 | break; | |
1321 | case 's': | |
1322 | if (strcmp (name, ".sdata") == 0) | |
1323 | r_symndx = RELOC_SECTION_SDATA; | |
1324 | else if (strcmp (name, ".sbss") == 0) | |
1325 | r_symndx = RELOC_SECTION_SBSS; | |
1326 | break; | |
1327 | case 't': | |
1328 | if (strcmp (name, ".text") == 0) | |
1329 | r_symndx = RELOC_SECTION_TEXT; | |
1330 | break; | |
1331 | case 'x': | |
1332 | if (strcmp (name, ".xdata") == 0) | |
1333 | r_symndx = RELOC_SECTION_XDATA; | |
1334 | break; | |
1335 | } | |
346ceb11 | 1336 | |
252b5132 RH |
1337 | if (r_symndx == -1) |
1338 | abort (); | |
1339 | ||
1340 | /* Add the section VMA and the symbol value. */ | |
1341 | relocation = (h->root.u.def.value | |
1342 | + hsec->output_section->vma | |
1343 | + hsec->output_offset); | |
1344 | } | |
1345 | else | |
1346 | { | |
1347 | /* Change the symndx value to the right one for | |
1348 | the output BFD. */ | |
1349 | r_symndx = h->indx; | |
1350 | if (r_symndx == -1) | |
1351 | { | |
1352 | /* Caller must give an error. */ | |
1353 | r_symndx = 0; | |
1354 | } | |
1355 | relocation = 0; | |
1356 | } | |
1357 | ||
1358 | /* Write out the new r_symndx value. */ | |
1359 | bfd_h_put_32 (input_bfd, (bfd_vma) r_symndx, | |
1360 | (bfd_byte *) ext_rel->r_symndx); | |
1361 | ||
1362 | return relocation; | |
1363 | } | |
1364 | ||
1365 | /* Relocate a section while linking an Alpha ECOFF file. This is | |
1366 | quite similar to get_relocated_section_contents. Perhaps they | |
1367 | could be combined somehow. */ | |
1368 | ||
1369 | static boolean | |
1370 | alpha_relocate_section (output_bfd, info, input_bfd, input_section, | |
1371 | contents, external_relocs) | |
1372 | bfd *output_bfd; | |
1373 | struct bfd_link_info *info; | |
1374 | bfd *input_bfd; | |
1375 | asection *input_section; | |
1376 | bfd_byte *contents; | |
1377 | PTR external_relocs; | |
1378 | { | |
1379 | asection **symndx_to_section, *lita_sec; | |
1380 | struct ecoff_link_hash_entry **sym_hashes; | |
1381 | bfd_vma gp; | |
1382 | boolean gp_undefined; | |
1383 | bfd_vma stack[RELOC_STACKSIZE]; | |
1384 | int tos = 0; | |
1385 | struct external_reloc *ext_rel; | |
1386 | struct external_reloc *ext_rel_end; | |
1387 | ||
1388 | /* We keep a table mapping the symndx found in an internal reloc to | |
1389 | the appropriate section. This is faster than looking up the | |
1390 | section by name each time. */ | |
1391 | symndx_to_section = ecoff_data (input_bfd)->symndx_to_section; | |
1392 | if (symndx_to_section == (asection **) NULL) | |
1393 | { | |
1394 | symndx_to_section = ((asection **) | |
1395 | bfd_alloc (input_bfd, | |
1396 | (NUM_RELOC_SECTIONS | |
1397 | * sizeof (asection *)))); | |
1398 | if (!symndx_to_section) | |
1399 | return false; | |
1400 | ||
1401 | symndx_to_section[RELOC_SECTION_NONE] = NULL; | |
1402 | symndx_to_section[RELOC_SECTION_TEXT] = | |
1403 | bfd_get_section_by_name (input_bfd, ".text"); | |
1404 | symndx_to_section[RELOC_SECTION_RDATA] = | |
1405 | bfd_get_section_by_name (input_bfd, ".rdata"); | |
1406 | symndx_to_section[RELOC_SECTION_DATA] = | |
1407 | bfd_get_section_by_name (input_bfd, ".data"); | |
1408 | symndx_to_section[RELOC_SECTION_SDATA] = | |
1409 | bfd_get_section_by_name (input_bfd, ".sdata"); | |
1410 | symndx_to_section[RELOC_SECTION_SBSS] = | |
1411 | bfd_get_section_by_name (input_bfd, ".sbss"); | |
1412 | symndx_to_section[RELOC_SECTION_BSS] = | |
1413 | bfd_get_section_by_name (input_bfd, ".bss"); | |
1414 | symndx_to_section[RELOC_SECTION_INIT] = | |
1415 | bfd_get_section_by_name (input_bfd, ".init"); | |
1416 | symndx_to_section[RELOC_SECTION_LIT8] = | |
1417 | bfd_get_section_by_name (input_bfd, ".lit8"); | |
1418 | symndx_to_section[RELOC_SECTION_LIT4] = | |
1419 | bfd_get_section_by_name (input_bfd, ".lit4"); | |
1420 | symndx_to_section[RELOC_SECTION_XDATA] = | |
1421 | bfd_get_section_by_name (input_bfd, ".xdata"); | |
1422 | symndx_to_section[RELOC_SECTION_PDATA] = | |
1423 | bfd_get_section_by_name (input_bfd, ".pdata"); | |
1424 | symndx_to_section[RELOC_SECTION_FINI] = | |
1425 | bfd_get_section_by_name (input_bfd, ".fini"); | |
1426 | symndx_to_section[RELOC_SECTION_LITA] = | |
1427 | bfd_get_section_by_name (input_bfd, ".lita"); | |
1428 | symndx_to_section[RELOC_SECTION_ABS] = bfd_abs_section_ptr; | |
1429 | symndx_to_section[RELOC_SECTION_RCONST] = | |
1430 | bfd_get_section_by_name (input_bfd, ".rconst"); | |
1431 | ||
1432 | ecoff_data (input_bfd)->symndx_to_section = symndx_to_section; | |
1433 | } | |
1434 | ||
1435 | sym_hashes = ecoff_data (input_bfd)->sym_hashes; | |
1436 | ||
1437 | /* On the Alpha, the .lita section must be addressable by the global | |
1438 | pointer. To support large programs, we need to allow multiple | |
1439 | global pointers. This works as long as each input .lita section | |
1440 | is <64KB big. This implies that when producing relocatable | |
346ceb11 | 1441 | output, the .lita section is limited to 64KB. . */ |
252b5132 RH |
1442 | |
1443 | lita_sec = symndx_to_section[RELOC_SECTION_LITA]; | |
1444 | gp = _bfd_get_gp_value (output_bfd); | |
1445 | if (! info->relocateable && lita_sec != NULL) | |
1446 | { | |
1447 | struct ecoff_section_tdata *lita_sec_data; | |
1448 | ||
1449 | /* Make sure we have a section data structure to which we can | |
1450 | hang on to the gp value we pick for the section. */ | |
1451 | lita_sec_data = ecoff_section_data (input_bfd, lita_sec); | |
1452 | if (lita_sec_data == NULL) | |
1453 | { | |
1454 | lita_sec_data = ((struct ecoff_section_tdata *) | |
1455 | bfd_zalloc (input_bfd, | |
1456 | sizeof (struct ecoff_section_tdata))); | |
1457 | ecoff_section_data (input_bfd, lita_sec) = lita_sec_data; | |
1458 | } | |
1459 | ||
1460 | if (lita_sec_data->gp != 0) | |
1461 | { | |
1462 | /* If we already assigned a gp to this section, we better | |
1463 | stick with that value. */ | |
1464 | gp = lita_sec_data->gp; | |
1465 | } | |
1466 | else | |
1467 | { | |
1468 | bfd_vma lita_vma; | |
1469 | bfd_size_type lita_size; | |
1470 | ||
1471 | lita_vma = lita_sec->output_offset + lita_sec->output_section->vma; | |
1472 | lita_size = lita_sec->_cooked_size; | |
1473 | if (lita_size == 0) | |
1474 | lita_size = lita_sec->_raw_size; | |
1475 | ||
1476 | if (gp == 0 | |
1477 | || lita_vma < gp - 0x8000 | |
1478 | || lita_vma + lita_size >= gp + 0x8000) | |
1479 | { | |
1480 | /* Either gp hasn't been set at all or the current gp | |
1481 | cannot address this .lita section. In both cases we | |
1482 | reset the gp to point into the "middle" of the | |
1483 | current input .lita section. */ | |
1484 | if (gp && !ecoff_data (output_bfd)->issued_multiple_gp_warning) | |
1485 | { | |
1486 | (*info->callbacks->warning) (info, | |
1487 | _("using multiple gp values"), | |
1488 | (char *) NULL, output_bfd, | |
1489 | (asection *) NULL, (bfd_vma) 0); | |
1490 | ecoff_data (output_bfd)->issued_multiple_gp_warning = true; | |
1491 | } | |
1492 | if (lita_vma < gp - 0x8000) | |
1493 | gp = lita_vma + lita_size - 0x8000; | |
1494 | else | |
1495 | gp = lita_vma + 0x8000; | |
1496 | ||
1497 | } | |
1498 | ||
1499 | lita_sec_data->gp = gp; | |
1500 | } | |
1501 | ||
1502 | _bfd_set_gp_value (output_bfd, gp); | |
1503 | } | |
1504 | ||
1505 | gp_undefined = (gp == 0); | |
1506 | ||
1507 | BFD_ASSERT (bfd_header_little_endian (output_bfd)); | |
1508 | BFD_ASSERT (bfd_header_little_endian (input_bfd)); | |
1509 | ||
1510 | ext_rel = (struct external_reloc *) external_relocs; | |
1511 | ext_rel_end = ext_rel + input_section->reloc_count; | |
1512 | for (; ext_rel < ext_rel_end; ext_rel++) | |
1513 | { | |
1514 | bfd_vma r_vaddr; | |
1515 | unsigned long r_symndx; | |
1516 | int r_type; | |
1517 | int r_extern; | |
1518 | int r_offset; | |
1519 | int r_size; | |
1520 | boolean relocatep; | |
1521 | boolean adjust_addrp; | |
1522 | boolean gp_usedp; | |
1523 | bfd_vma addend; | |
1524 | ||
1525 | r_vaddr = bfd_h_get_64 (input_bfd, (bfd_byte *) ext_rel->r_vaddr); | |
1526 | r_symndx = bfd_h_get_32 (input_bfd, (bfd_byte *) ext_rel->r_symndx); | |
1527 | ||
1528 | r_type = ((ext_rel->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
1529 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
1530 | r_extern = (ext_rel->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
1531 | r_offset = ((ext_rel->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
1532 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
1533 | /* Ignored the reserved bits. */ | |
1534 | r_size = ((ext_rel->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
1535 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
1536 | ||
1537 | relocatep = false; | |
1538 | adjust_addrp = true; | |
1539 | gp_usedp = false; | |
1540 | addend = 0; | |
1541 | ||
1542 | switch (r_type) | |
1543 | { | |
1544 | default: | |
1545 | abort (); | |
1546 | ||
1547 | case ALPHA_R_IGNORE: | |
1548 | /* This reloc appears after a GPDISP reloc. On earlier | |
1549 | versions of OSF/1, It marked the position of the second | |
1550 | instruction to be altered by the GPDISP reloc, but it is | |
1551 | not otherwise used for anything. For some reason, the | |
1552 | address of the relocation does not appear to include the | |
1553 | section VMA, unlike the other relocation types. */ | |
1554 | if (info->relocateable) | |
1555 | bfd_h_put_64 (input_bfd, | |
1556 | input_section->output_offset + r_vaddr, | |
1557 | (bfd_byte *) ext_rel->r_vaddr); | |
1558 | adjust_addrp = false; | |
1559 | break; | |
1560 | ||
1561 | case ALPHA_R_REFLONG: | |
1562 | case ALPHA_R_REFQUAD: | |
1563 | case ALPHA_R_HINT: | |
1564 | relocatep = true; | |
1565 | break; | |
1566 | ||
1567 | case ALPHA_R_BRADDR: | |
1568 | case ALPHA_R_SREL16: | |
1569 | case ALPHA_R_SREL32: | |
1570 | case ALPHA_R_SREL64: | |
1571 | if (r_extern) | |
1572 | addend += - (r_vaddr + 4); | |
1573 | relocatep = true; | |
1574 | break; | |
1575 | ||
1576 | case ALPHA_R_GPREL32: | |
1577 | /* This relocation is used in a switch table. It is a 32 | |
1578 | bit offset from the current GP value. We must adjust it | |
1579 | by the different between the original GP value and the | |
1580 | current GP value. */ | |
1581 | relocatep = true; | |
1582 | addend = ecoff_data (input_bfd)->gp - gp; | |
1583 | gp_usedp = true; | |
1584 | break; | |
1585 | ||
1586 | case ALPHA_R_LITERAL: | |
1587 | /* This is a reference to a literal value, generally | |
1588 | (always?) in the .lita section. This is a 16 bit GP | |
1589 | relative relocation. Sometimes the subsequent reloc is a | |
1590 | LITUSE reloc, which indicates how this reloc is used. | |
1591 | This sometimes permits rewriting the two instructions | |
1592 | referred to by the LITERAL and the LITUSE into different | |
1593 | instructions which do not refer to .lita. This can save | |
1594 | a memory reference, and permits removing a value from | |
1595 | .lita thus saving GP relative space. | |
1596 | ||
1597 | We do not these optimizations. To do them we would need | |
1598 | to arrange to link the .lita section first, so that by | |
1599 | the time we got here we would know the final values to | |
1600 | use. This would not be particularly difficult, but it is | |
1601 | not currently implemented. */ | |
1602 | ||
1603 | /* I believe that the LITERAL reloc will only apply to a ldq | |
1604 | or ldl instruction, so check my assumption. */ | |
1605 | { | |
1606 | unsigned long insn; | |
1607 | ||
1608 | insn = bfd_get_32 (input_bfd, | |
1609 | contents + r_vaddr - input_section->vma); | |
1610 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 | |
1611 | || ((insn >> 26) & 0x3f) == 0x28); | |
1612 | } | |
1613 | ||
1614 | relocatep = true; | |
1615 | addend = ecoff_data (input_bfd)->gp - gp; | |
1616 | gp_usedp = true; | |
1617 | break; | |
1618 | ||
1619 | case ALPHA_R_LITUSE: | |
1620 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
1621 | does not cause anything to happen, itself. */ | |
1622 | break; | |
346ceb11 | 1623 | |
252b5132 RH |
1624 | case ALPHA_R_GPDISP: |
1625 | /* This marks the ldah of an ldah/lda pair which loads the | |
1626 | gp register with the difference of the gp value and the | |
1627 | current location. The second of the pair is r_symndx | |
1628 | bytes ahead. It used to be marked with an ALPHA_R_IGNORE | |
1629 | reloc, but OSF/1 3.2 no longer does that. */ | |
1630 | { | |
1631 | unsigned long insn1, insn2; | |
1632 | ||
1633 | /* Get the two instructions. */ | |
1634 | insn1 = bfd_get_32 (input_bfd, | |
1635 | contents + r_vaddr - input_section->vma); | |
1636 | insn2 = bfd_get_32 (input_bfd, | |
1637 | (contents | |
1638 | + r_vaddr | |
1639 | - input_section->vma | |
1640 | + r_symndx)); | |
1641 | ||
1642 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
1643 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
1644 | ||
1645 | /* Get the existing addend. We must account for the sign | |
1646 | extension done by lda and ldah. */ | |
1647 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
1648 | if (insn1 & 0x8000) | |
1649 | { | |
1650 | /* This is addend -= 0x100000000 without causing an | |
1651 | integer overflow on a 32 bit host. */ | |
1652 | addend -= 0x80000000; | |
1653 | addend -= 0x80000000; | |
1654 | } | |
1655 | if (insn2 & 0x8000) | |
1656 | addend -= 0x10000; | |
1657 | ||
1658 | /* The existing addend includes the difference between the | |
1659 | gp of the input BFD and the address in the input BFD. | |
1660 | We want to change this to the difference between the | |
1661 | final GP and the final address. */ | |
1662 | addend += (gp | |
1663 | - ecoff_data (input_bfd)->gp | |
1664 | + input_section->vma | |
1665 | - (input_section->output_section->vma | |
1666 | + input_section->output_offset)); | |
1667 | ||
1668 | /* Change the instructions, accounting for the sign | |
1669 | extension, and write them out. */ | |
1670 | if (addend & 0x8000) | |
1671 | addend += 0x10000; | |
1672 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
1673 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
1674 | ||
1675 | bfd_put_32 (input_bfd, (bfd_vma) insn1, | |
1676 | contents + r_vaddr - input_section->vma); | |
1677 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
1678 | contents + r_vaddr - input_section->vma + r_symndx); | |
1679 | ||
1680 | gp_usedp = true; | |
1681 | } | |
1682 | break; | |
346ceb11 | 1683 | |
252b5132 RH |
1684 | case ALPHA_R_OP_PUSH: |
1685 | case ALPHA_R_OP_PSUB: | |
1686 | case ALPHA_R_OP_PRSHIFT: | |
1687 | /* Manipulate values on the reloc evaluation stack. The | |
1688 | r_vaddr field is not an address in input_section, it is | |
1689 | the current value (including any addend) of the object | |
1690 | being used. */ | |
1691 | if (! r_extern) | |
1692 | { | |
1693 | asection *s; | |
1694 | ||
1695 | s = symndx_to_section[r_symndx]; | |
1696 | if (s == (asection *) NULL) | |
1697 | abort (); | |
1698 | addend = s->output_section->vma + s->output_offset - s->vma; | |
1699 | } | |
1700 | else | |
1701 | { | |
1702 | struct ecoff_link_hash_entry *h; | |
1703 | ||
1704 | h = sym_hashes[r_symndx]; | |
1705 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1706 | abort (); | |
1707 | ||
1708 | if (! info->relocateable) | |
1709 | { | |
1710 | if (h->root.type == bfd_link_hash_defined | |
1711 | || h->root.type == bfd_link_hash_defweak) | |
1712 | addend = (h->root.u.def.value | |
1713 | + h->root.u.def.section->output_section->vma | |
1714 | + h->root.u.def.section->output_offset); | |
1715 | else | |
1716 | { | |
1717 | /* Note that we pass the address as 0, since we | |
1718 | do not have a meaningful number for the | |
1719 | location within the section that is being | |
1720 | relocated. */ | |
1721 | if (! ((*info->callbacks->undefined_symbol) | |
1722 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1723 | input_section, (bfd_vma) 0, true))) |
252b5132 RH |
1724 | return false; |
1725 | addend = 0; | |
1726 | } | |
1727 | } | |
1728 | else | |
1729 | { | |
1730 | if (h->root.type != bfd_link_hash_defined | |
1731 | && h->root.type != bfd_link_hash_defweak | |
1732 | && h->indx == -1) | |
1733 | { | |
1734 | /* This symbol is not being written out. Pass | |
1735 | the address as 0, as with undefined_symbol, | |
1736 | above. */ | |
1737 | if (! ((*info->callbacks->unattached_reloc) | |
1738 | (info, h->root.root.string, input_bfd, | |
1739 | input_section, (bfd_vma) 0))) | |
1740 | return false; | |
1741 | } | |
1742 | ||
1743 | addend = alpha_convert_external_reloc (output_bfd, info, | |
1744 | input_bfd, | |
1745 | ext_rel, h); | |
1746 | } | |
1747 | } | |
1748 | ||
1749 | addend += r_vaddr; | |
1750 | ||
1751 | if (info->relocateable) | |
1752 | { | |
1753 | /* Adjust r_vaddr by the addend. */ | |
1754 | bfd_h_put_64 (input_bfd, addend, | |
1755 | (bfd_byte *) ext_rel->r_vaddr); | |
1756 | } | |
1757 | else | |
1758 | { | |
1759 | switch (r_type) | |
1760 | { | |
1761 | case ALPHA_R_OP_PUSH: | |
1762 | if (tos >= RELOC_STACKSIZE) | |
1763 | abort (); | |
1764 | stack[tos++] = addend; | |
1765 | break; | |
1766 | ||
1767 | case ALPHA_R_OP_PSUB: | |
1768 | if (tos == 0) | |
1769 | abort (); | |
1770 | stack[tos - 1] -= addend; | |
1771 | break; | |
1772 | ||
1773 | case ALPHA_R_OP_PRSHIFT: | |
1774 | if (tos == 0) | |
1775 | abort (); | |
1776 | stack[tos - 1] >>= addend; | |
1777 | break; | |
1778 | } | |
1779 | } | |
1780 | ||
1781 | adjust_addrp = false; | |
1782 | break; | |
1783 | ||
1784 | case ALPHA_R_OP_STORE: | |
1785 | /* Store a value from the reloc stack into a bitfield. If | |
1786 | we are generating relocateable output, all we do is | |
1787 | adjust the address of the reloc. */ | |
1788 | if (! info->relocateable) | |
1789 | { | |
1790 | bfd_vma mask; | |
1791 | bfd_vma val; | |
1792 | ||
1793 | if (tos == 0) | |
1794 | abort (); | |
1795 | ||
1796 | /* Get the relocation mask. The separate steps and the | |
1797 | casts to bfd_vma are attempts to avoid a bug in the | |
1798 | Alpha OSF 1.3 C compiler. See reloc.c for more | |
1799 | details. */ | |
1800 | mask = 1; | |
1801 | mask <<= (bfd_vma) r_size; | |
1802 | mask -= 1; | |
1803 | ||
1804 | /* FIXME: I don't know what kind of overflow checking, | |
1805 | if any, should be done here. */ | |
1806 | val = bfd_get_64 (input_bfd, | |
1807 | contents + r_vaddr - input_section->vma); | |
1808 | val &=~ mask << (bfd_vma) r_offset; | |
1809 | val |= (stack[--tos] & mask) << (bfd_vma) r_offset; | |
1810 | bfd_put_64 (input_bfd, val, | |
1811 | contents + r_vaddr - input_section->vma); | |
1812 | } | |
1813 | break; | |
1814 | ||
1815 | case ALPHA_R_GPVALUE: | |
1816 | /* I really don't know if this does the right thing. */ | |
1817 | gp = ecoff_data (input_bfd)->gp + r_symndx; | |
1818 | gp_undefined = false; | |
1819 | break; | |
1820 | } | |
1821 | ||
1822 | if (relocatep) | |
1823 | { | |
1824 | reloc_howto_type *howto; | |
1825 | struct ecoff_link_hash_entry *h = NULL; | |
1826 | asection *s = NULL; | |
1827 | bfd_vma relocation; | |
1828 | bfd_reloc_status_type r; | |
1829 | ||
1830 | /* Perform a relocation. */ | |
1831 | ||
1832 | howto = &alpha_howto_table[r_type]; | |
1833 | ||
1834 | if (r_extern) | |
1835 | { | |
1836 | h = sym_hashes[r_symndx]; | |
1837 | /* If h is NULL, that means that there is a reloc | |
1838 | against an external symbol which we thought was just | |
1839 | a debugging symbol. This should not happen. */ | |
1840 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1841 | abort (); | |
1842 | } | |
1843 | else | |
1844 | { | |
1845 | if (r_symndx >= NUM_RELOC_SECTIONS) | |
1846 | s = NULL; | |
1847 | else | |
1848 | s = symndx_to_section[r_symndx]; | |
1849 | ||
1850 | if (s == (asection *) NULL) | |
1851 | abort (); | |
1852 | } | |
1853 | ||
1854 | if (info->relocateable) | |
1855 | { | |
1856 | /* We are generating relocateable output, and must | |
1857 | convert the existing reloc. */ | |
1858 | if (r_extern) | |
1859 | { | |
1860 | if (h->root.type != bfd_link_hash_defined | |
1861 | && h->root.type != bfd_link_hash_defweak | |
1862 | && h->indx == -1) | |
1863 | { | |
1864 | /* This symbol is not being written out. */ | |
1865 | if (! ((*info->callbacks->unattached_reloc) | |
1866 | (info, h->root.root.string, input_bfd, | |
1867 | input_section, r_vaddr - input_section->vma))) | |
1868 | return false; | |
1869 | } | |
1870 | ||
1871 | relocation = alpha_convert_external_reloc (output_bfd, | |
1872 | info, | |
1873 | input_bfd, | |
1874 | ext_rel, | |
1875 | h); | |
1876 | } | |
1877 | else | |
1878 | { | |
1879 | /* This is a relocation against a section. Adjust | |
1880 | the value by the amount the section moved. */ | |
1881 | relocation = (s->output_section->vma | |
1882 | + s->output_offset | |
1883 | - s->vma); | |
1884 | } | |
1885 | ||
1886 | /* If this is PC relative, the existing object file | |
1887 | appears to already have the reloc worked out. We | |
1888 | must subtract out the old value and add in the new | |
1889 | one. */ | |
1890 | if (howto->pc_relative) | |
1891 | relocation -= (input_section->output_section->vma | |
1892 | + input_section->output_offset | |
1893 | - input_section->vma); | |
1894 | ||
1895 | /* Put in any addend. */ | |
1896 | relocation += addend; | |
1897 | ||
1898 | /* Adjust the contents. */ | |
1899 | r = _bfd_relocate_contents (howto, input_bfd, relocation, | |
1900 | (contents | |
1901 | + r_vaddr | |
1902 | - input_section->vma)); | |
1903 | } | |
1904 | else | |
1905 | { | |
1906 | /* We are producing a final executable. */ | |
1907 | if (r_extern) | |
1908 | { | |
1909 | /* This is a reloc against a symbol. */ | |
1910 | if (h->root.type == bfd_link_hash_defined | |
1911 | || h->root.type == bfd_link_hash_defweak) | |
1912 | { | |
1913 | asection *hsec; | |
1914 | ||
1915 | hsec = h->root.u.def.section; | |
1916 | relocation = (h->root.u.def.value | |
1917 | + hsec->output_section->vma | |
1918 | + hsec->output_offset); | |
1919 | } | |
1920 | else | |
1921 | { | |
1922 | if (! ((*info->callbacks->undefined_symbol) | |
1923 | (info, h->root.root.string, input_bfd, | |
1924 | input_section, | |
5cc7c785 | 1925 | r_vaddr - input_section->vma, true))) |
252b5132 RH |
1926 | return false; |
1927 | relocation = 0; | |
1928 | } | |
1929 | } | |
1930 | else | |
1931 | { | |
1932 | /* This is a reloc against a section. */ | |
1933 | relocation = (s->output_section->vma | |
1934 | + s->output_offset | |
1935 | - s->vma); | |
1936 | ||
1937 | /* Adjust a PC relative relocation by removing the | |
1938 | reference to the original source section. */ | |
1939 | if (howto->pc_relative) | |
1940 | relocation += input_section->vma; | |
1941 | } | |
1942 | ||
1943 | r = _bfd_final_link_relocate (howto, | |
1944 | input_bfd, | |
1945 | input_section, | |
1946 | contents, | |
1947 | r_vaddr - input_section->vma, | |
1948 | relocation, | |
1949 | addend); | |
1950 | } | |
1951 | ||
1952 | if (r != bfd_reloc_ok) | |
1953 | { | |
1954 | switch (r) | |
1955 | { | |
1956 | default: | |
1957 | case bfd_reloc_outofrange: | |
1958 | abort (); | |
1959 | case bfd_reloc_overflow: | |
1960 | { | |
1961 | const char *name; | |
1962 | ||
1963 | if (r_extern) | |
1964 | name = sym_hashes[r_symndx]->root.root.string; | |
1965 | else | |
1966 | name = bfd_section_name (input_bfd, | |
1967 | symndx_to_section[r_symndx]); | |
1968 | if (! ((*info->callbacks->reloc_overflow) | |
1969 | (info, name, alpha_howto_table[r_type].name, | |
1970 | (bfd_vma) 0, input_bfd, input_section, | |
1971 | r_vaddr - input_section->vma))) | |
1972 | return false; | |
1973 | } | |
1974 | break; | |
1975 | } | |
1976 | } | |
1977 | } | |
1978 | ||
1979 | if (info->relocateable && adjust_addrp) | |
1980 | { | |
1981 | /* Change the address of the relocation. */ | |
1982 | bfd_h_put_64 (input_bfd, | |
1983 | (input_section->output_section->vma | |
1984 | + input_section->output_offset | |
1985 | - input_section->vma | |
1986 | + r_vaddr), | |
1987 | (bfd_byte *) ext_rel->r_vaddr); | |
1988 | } | |
1989 | ||
1990 | if (gp_usedp && gp_undefined) | |
1991 | { | |
1992 | if (! ((*info->callbacks->reloc_dangerous) | |
1993 | (info, _("GP relative relocation when GP not defined"), | |
1994 | input_bfd, input_section, r_vaddr - input_section->vma))) | |
1995 | return false; | |
1996 | /* Only give the error once per link. */ | |
1997 | gp = 4; | |
1998 | _bfd_set_gp_value (output_bfd, gp); | |
1999 | gp_undefined = false; | |
2000 | } | |
2001 | } | |
2002 | ||
2003 | if (tos != 0) | |
2004 | abort (); | |
2005 | ||
2006 | return true; | |
2007 | } | |
2008 | \f | |
2009 | /* Do final adjustments to the filehdr and the aouthdr. This routine | |
2010 | sets the dynamic bits in the file header. */ | |
2011 | ||
252b5132 RH |
2012 | static boolean |
2013 | alpha_adjust_headers (abfd, fhdr, ahdr) | |
2014 | bfd *abfd; | |
2015 | struct internal_filehdr *fhdr; | |
b2747490 | 2016 | struct internal_aouthdr *ahdr ATTRIBUTE_UNUSED; |
252b5132 RH |
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 | ||
346ceb11 | 2139 | /* I don't know what the next eight bytes are for. */ |
252b5132 RH |
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); | |
346ceb11 | 2204 | return NULL; |
252b5132 RH |
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 | |
346ceb11 | 2232 | BSD-4.4-style element with a long odd size. */ |
252b5132 RH |
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, | |
6732d8bf | 2269 | FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, true, false, 4, false, 2, |
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 | |
8550eb6e | 2362 | #define _bfd_ecoff_bfd_merge_sections bfd_generic_merge_sections |
252b5132 RH |
2363 | |
2364 | const bfd_target ecoffalpha_little_vec = | |
2365 | { | |
2366 | "ecoff-littlealpha", /* name */ | |
2367 | bfd_target_ecoff_flavour, | |
2368 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
2369 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
2370 | ||
2371 | (HAS_RELOC | EXEC_P | /* object flags */ | |
2372 | HAS_LINENO | HAS_DEBUG | | |
2373 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), | |
2374 | ||
2375 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), | |
2376 | 0, /* leading underscore */ | |
2377 | ' ', /* ar_pad_char */ | |
2378 | 15, /* ar_max_namelen */ | |
2379 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2380 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2381 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
2382 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2383 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2384 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
2385 | ||
2386 | {_bfd_dummy_target, alpha_ecoff_object_p, /* bfd_check_format */ | |
2387 | _bfd_ecoff_archive_p, _bfd_dummy_target}, | |
2388 | {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */ | |
2389 | _bfd_generic_mkarchive, bfd_false}, | |
2390 | {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */ | |
2391 | _bfd_write_archive_contents, bfd_false}, | |
2392 | ||
2393 | BFD_JUMP_TABLE_GENERIC (_bfd_ecoff), | |
2394 | BFD_JUMP_TABLE_COPY (_bfd_ecoff), | |
2395 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
2396 | BFD_JUMP_TABLE_ARCHIVE (alpha_ecoff), | |
2397 | BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff), | |
2398 | BFD_JUMP_TABLE_RELOCS (_bfd_ecoff), | |
2399 | BFD_JUMP_TABLE_WRITE (_bfd_ecoff), | |
2400 | BFD_JUMP_TABLE_LINK (_bfd_ecoff), | |
2401 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
2402 | ||
c3c89269 | 2403 | NULL, |
346ceb11 | 2404 | |
252b5132 RH |
2405 | (PTR) &alpha_ecoff_backend_data |
2406 | }; |