Commit | Line | Data |
---|---|---|
dae31cf5 | 1 | /* BFD back-end for ALPHA Extended-Coff files. |
fa965415 | 2 | Copyright 1993, 1994 Free Software Foundation, Inc. |
dae31cf5 ILT |
3 | Modified from coff-mips.c by Steve Chamberlain <sac@cygnus.com> and |
4 | Ian Lance Taylor <ian@cygnus.com>. | |
5f8f6d56 | 5 | |
5f8f6d56 SC |
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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
693f8191 | 24 | #include "bfdlink.h" |
5f8f6d56 | 25 | #include "libbfd.h" |
5f8f6d56 SC |
26 | #include "coff/internal.h" |
27 | #include "coff/sym.h" | |
28 | #include "coff/symconst.h" | |
dae31cf5 ILT |
29 | #include "coff/ecoff.h" |
30 | #include "coff/alpha.h" | |
5f8f6d56 SC |
31 | #include "libcoff.h" |
32 | #include "libecoff.h" | |
5f8f6d56 SC |
33 | \f |
34 | /* Prototypes for static functions. */ | |
35 | ||
3f048f7f | 36 | static bfd_target *alpha_ecoff_object_p PARAMS ((bfd *)); |
dae31cf5 | 37 | static boolean alpha_ecoff_bad_format_hook PARAMS ((bfd *abfd, PTR filehdr)); |
dae31cf5 ILT |
38 | static void alpha_ecoff_swap_reloc_in PARAMS ((bfd *, PTR, |
39 | struct internal_reloc *)); | |
40 | static void alpha_ecoff_swap_reloc_out PARAMS ((bfd *, | |
41 | const struct internal_reloc *, | |
42 | PTR)); | |
693f8191 KR |
43 | static void alpha_adjust_reloc_in PARAMS ((bfd *, |
44 | const struct internal_reloc *, | |
45 | arelent *)); | |
46 | static void alpha_adjust_reloc_out PARAMS ((bfd *, const arelent *, | |
47 | struct internal_reloc *)); | |
48 | static bfd_byte *alpha_ecoff_get_relocated_section_contents | |
49 | PARAMS ((bfd *abfd, struct bfd_link_info *, struct bfd_link_order *, | |
50 | bfd_byte *data, boolean relocateable, asymbol **symbols)); | |
51 | static bfd_vma alpha_convert_external_reloc | |
52 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, struct external_reloc *, | |
53 | struct ecoff_link_hash_entry *)); | |
54 | static boolean alpha_relocate_section PARAMS ((bfd *, struct bfd_link_info *, | |
55 | bfd *, asection *, | |
56 | bfd_byte *, PTR)); | |
5f8f6d56 | 57 | \f |
dae31cf5 ILT |
58 | /* ECOFF has COFF sections, but the debugging information is stored in |
59 | a completely different format. ECOFF targets use some of the | |
60 | swapping routines from coffswap.h, and some of the generic COFF | |
61 | routines in coffgen.c, but, unlike the real COFF targets, do not | |
62 | use coffcode.h itself. | |
63 | ||
64 | Get the generic COFF swapping routines, except for the reloc, | |
693f8191 KR |
65 | symbol, and lineno ones. Give them ecoff names. Define some |
66 | accessor macros for the large sizes used for Alpha ECOFF. */ | |
67 | ||
68 | #define GET_FILEHDR_SYMPTR bfd_h_get_64 | |
69 | #define PUT_FILEHDR_SYMPTR bfd_h_put_64 | |
70 | #define GET_AOUTHDR_TSIZE bfd_h_get_64 | |
71 | #define PUT_AOUTHDR_TSIZE bfd_h_put_64 | |
72 | #define GET_AOUTHDR_DSIZE bfd_h_get_64 | |
73 | #define PUT_AOUTHDR_DSIZE bfd_h_put_64 | |
74 | #define GET_AOUTHDR_BSIZE bfd_h_get_64 | |
75 | #define PUT_AOUTHDR_BSIZE bfd_h_put_64 | |
76 | #define GET_AOUTHDR_ENTRY bfd_h_get_64 | |
77 | #define PUT_AOUTHDR_ENTRY bfd_h_put_64 | |
78 | #define GET_AOUTHDR_TEXT_START bfd_h_get_64 | |
79 | #define PUT_AOUTHDR_TEXT_START bfd_h_put_64 | |
80 | #define GET_AOUTHDR_DATA_START bfd_h_get_64 | |
81 | #define PUT_AOUTHDR_DATA_START bfd_h_put_64 | |
82 | #define GET_SCNHDR_PADDR bfd_h_get_64 | |
83 | #define PUT_SCNHDR_PADDR bfd_h_put_64 | |
84 | #define GET_SCNHDR_VADDR bfd_h_get_64 | |
85 | #define PUT_SCNHDR_VADDR bfd_h_put_64 | |
86 | #define GET_SCNHDR_SIZE bfd_h_get_64 | |
87 | #define PUT_SCNHDR_SIZE bfd_h_put_64 | |
88 | #define GET_SCNHDR_SCNPTR bfd_h_get_64 | |
89 | #define PUT_SCNHDR_SCNPTR bfd_h_put_64 | |
90 | #define GET_SCNHDR_RELPTR bfd_h_get_64 | |
91 | #define PUT_SCNHDR_RELPTR bfd_h_put_64 | |
92 | #define GET_SCNHDR_LNNOPTR bfd_h_get_64 | |
93 | #define PUT_SCNHDR_LNNOPTR bfd_h_put_64 | |
94 | ||
dae31cf5 | 95 | #define ALPHAECOFF |
693f8191 | 96 | |
5f8f6d56 SC |
97 | #define NO_COFF_RELOCS |
98 | #define NO_COFF_SYMBOLS | |
99 | #define NO_COFF_LINENOS | |
dae31cf5 ILT |
100 | #define coff_swap_filehdr_in alpha_ecoff_swap_filehdr_in |
101 | #define coff_swap_filehdr_out alpha_ecoff_swap_filehdr_out | |
102 | #define coff_swap_aouthdr_in alpha_ecoff_swap_aouthdr_in | |
103 | #define coff_swap_aouthdr_out alpha_ecoff_swap_aouthdr_out | |
104 | #define coff_swap_scnhdr_in alpha_ecoff_swap_scnhdr_in | |
105 | #define coff_swap_scnhdr_out alpha_ecoff_swap_scnhdr_out | |
5f8f6d56 | 106 | #include "coffswap.h" |
5f8f6d56 | 107 | |
dae31cf5 ILT |
108 | /* Get the ECOFF swapping routines. */ |
109 | #define ECOFF_64 | |
110 | #include "ecoffswap.h" | |
111 | \f | |
693f8191 | 112 | /* How to process the various reloc types. */ |
dae31cf5 | 113 | |
fa965415 | 114 | static bfd_reloc_status_type |
3a1de3cc PS |
115 | reloc_nil PARAMS ((bfd *, arelent *, asymbol *, PTR, |
116 | asection *, bfd *, char **)); | |
117 | ||
118 | static bfd_reloc_status_type | |
119 | reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message) | |
fa965415 KR |
120 | bfd *abfd; |
121 | arelent *reloc; | |
122 | asymbol *sym; | |
123 | PTR data; | |
124 | asection *sec; | |
125 | bfd *output_bfd; | |
3a1de3cc | 126 | char **error_message; |
fa965415 KR |
127 | { |
128 | return bfd_reloc_ok; | |
129 | } | |
130 | ||
693f8191 KR |
131 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
132 | from smaller values. Start with zero, widen, *then* decrement. */ | |
133 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
134 | ||
135 | static reloc_howto_type alpha_howto_table[] = | |
dae31cf5 | 136 | { |
693f8191 KR |
137 | /* Reloc type 0 is ignored by itself. However, it appears after a |
138 | GPDISP reloc to identify the location where the low order 16 bits | |
139 | of the gp register are loaded. */ | |
140 | HOWTO (ALPHA_R_IGNORE, /* type */ | |
141 | 0, /* rightshift */ | |
142 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
143 | 8, /* bitsize */ | |
144 | true, /* pc_relative */ | |
145 | 0, /* bitpos */ | |
146 | complain_overflow_dont, /* complain_on_overflow */ | |
fa965415 | 147 | reloc_nil, /* special_function */ |
693f8191 | 148 | "IGNORE", /* name */ |
fa965415 | 149 | true, /* partial_inplace */ |
693f8191 KR |
150 | 0, /* src_mask */ |
151 | 0, /* dst_mask */ | |
152 | true), /* pcrel_offset */ | |
153 | ||
154 | /* A 32 bit reference to a symbol. */ | |
155 | HOWTO (ALPHA_R_REFLONG, /* type */ | |
156 | 0, /* rightshift */ | |
157 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
158 | 32, /* bitsize */ | |
159 | false, /* pc_relative */ | |
160 | 0, /* bitpos */ | |
161 | complain_overflow_bitfield, /* complain_on_overflow */ | |
162 | 0, /* special_function */ | |
163 | "REFLONG", /* name */ | |
164 | true, /* partial_inplace */ | |
165 | 0xffffffff, /* src_mask */ | |
166 | 0xffffffff, /* dst_mask */ | |
167 | false), /* pcrel_offset */ | |
168 | ||
169 | /* A 64 bit reference to a symbol. */ | |
170 | HOWTO (ALPHA_R_REFQUAD, /* type */ | |
171 | 0, /* rightshift */ | |
172 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
173 | 64, /* bitsize */ | |
174 | false, /* pc_relative */ | |
175 | 0, /* bitpos */ | |
176 | complain_overflow_bitfield, /* complain_on_overflow */ | |
177 | 0, /* special_function */ | |
178 | "REFQUAD", /* name */ | |
179 | true, /* partial_inplace */ | |
180 | MINUS_ONE, /* src_mask */ | |
181 | MINUS_ONE, /* dst_mask */ | |
182 | false), /* pcrel_offset */ | |
183 | ||
184 | /* A 32 bit GP relative offset. This is just like REFLONG except | |
185 | that when the value is used the value of the gp register will be | |
186 | added in. */ | |
187 | HOWTO (ALPHA_R_GPREL32, /* type */ | |
188 | 0, /* rightshift */ | |
189 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
190 | 32, /* bitsize */ | |
191 | false, /* pc_relative */ | |
192 | 0, /* bitpos */ | |
193 | complain_overflow_bitfield, /* complain_on_overflow */ | |
194 | 0, /* special_function */ | |
195 | "GPREL32", /* name */ | |
196 | true, /* partial_inplace */ | |
197 | 0xffffffff, /* src_mask */ | |
198 | 0xffffffff, /* dst_mask */ | |
199 | false), /* pcrel_offset */ | |
200 | ||
201 | /* Used for an instruction that refers to memory off the GP | |
202 | register. The offset is 16 bits of the 32 bit instruction. This | |
203 | reloc always seems to be against the .lita section. */ | |
204 | HOWTO (ALPHA_R_LITERAL, /* type */ | |
205 | 0, /* rightshift */ | |
206 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
207 | 16, /* bitsize */ | |
208 | false, /* pc_relative */ | |
209 | 0, /* bitpos */ | |
210 | complain_overflow_signed, /* complain_on_overflow */ | |
211 | 0, /* special_function */ | |
212 | "LITERAL", /* name */ | |
213 | true, /* partial_inplace */ | |
214 | 0xffff, /* src_mask */ | |
215 | 0xffff, /* dst_mask */ | |
216 | false), /* pcrel_offset */ | |
217 | ||
218 | /* This reloc only appears immediately following a LITERAL reloc. | |
219 | It identifies a use of the literal. It seems that the linker can | |
220 | use this to eliminate a portion of the .lita section. The symbol | |
221 | index is special: 1 means the literal address is in the base | |
222 | register of a memory format instruction; 2 means the literal | |
223 | address is in the byte offset register of a byte-manipulation | |
224 | instruction; 3 means the literal address is in the target | |
225 | register of a jsr instruction. This does not actually do any | |
226 | relocation. */ | |
227 | HOWTO (ALPHA_R_LITUSE, /* type */ | |
228 | 0, /* rightshift */ | |
229 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
230 | 32, /* bitsize */ | |
231 | false, /* pc_relative */ | |
232 | 0, /* bitpos */ | |
233 | complain_overflow_dont, /* complain_on_overflow */ | |
fa965415 | 234 | reloc_nil, /* special_function */ |
693f8191 KR |
235 | "LITUSE", /* name */ |
236 | false, /* partial_inplace */ | |
237 | 0, /* src_mask */ | |
238 | 0, /* dst_mask */ | |
239 | false), /* pcrel_offset */ | |
240 | ||
241 | /* Load the gp register. This is always used for a ldah instruction | |
242 | which loads the upper 16 bits of the gp register. The next reloc | |
243 | will be an IGNORE reloc which identifies the location of the lda | |
244 | instruction which loads the lower 16 bits. The symbol index of | |
245 | the GPDISP instruction appears to actually be the number of bytes | |
246 | between the ldah and lda instructions. This gives two different | |
247 | ways to determine where the lda instruction is; I don't know why | |
248 | both are used. The value to use for the relocation is the | |
249 | difference between the GP value and the current location; the | |
250 | load will always be done against a register holding the current | |
251 | address. */ | |
252 | HOWTO (ALPHA_R_GPDISP, /* type */ | |
253 | 16, /* rightshift */ | |
254 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
255 | 16, /* bitsize */ | |
256 | true, /* pc_relative */ | |
257 | 0, /* bitpos */ | |
258 | complain_overflow_dont, /* complain_on_overflow */ | |
fa965415 | 259 | reloc_nil, /* special_function */ |
693f8191 KR |
260 | "GPDISP", /* name */ |
261 | true, /* partial_inplace */ | |
262 | 0xffff, /* src_mask */ | |
263 | 0xffff, /* dst_mask */ | |
264 | true), /* pcrel_offset */ | |
265 | ||
266 | /* A 21 bit branch. The native assembler generates these for | |
267 | branches within the text segment, and also fills in the PC | |
268 | relative offset in the instruction. */ | |
269 | HOWTO (ALPHA_R_BRADDR, /* type */ | |
270 | 2, /* rightshift */ | |
271 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
272 | 21, /* bitsize */ | |
273 | true, /* pc_relative */ | |
274 | 0, /* bitpos */ | |
275 | complain_overflow_signed, /* complain_on_overflow */ | |
276 | 0, /* special_function */ | |
277 | "BRADDR", /* name */ | |
278 | true, /* partial_inplace */ | |
279 | 0x1fffff, /* src_mask */ | |
280 | 0x1fffff, /* dst_mask */ | |
281 | false), /* pcrel_offset */ | |
282 | ||
283 | /* A hint for a jump to a register. */ | |
284 | HOWTO (ALPHA_R_HINT, /* type */ | |
285 | 2, /* rightshift */ | |
286 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
287 | 14, /* bitsize */ | |
288 | true, /* pc_relative */ | |
289 | 0, /* bitpos */ | |
290 | complain_overflow_dont, /* complain_on_overflow */ | |
291 | 0, /* special_function */ | |
292 | "HINT", /* name */ | |
293 | true, /* partial_inplace */ | |
294 | 0x3fff, /* src_mask */ | |
295 | 0x3fff, /* dst_mask */ | |
296 | false), /* pcrel_offset */ | |
297 | ||
298 | /* 16 bit PC relative offset. */ | |
299 | HOWTO (ALPHA_R_SREL16, /* type */ | |
300 | 0, /* rightshift */ | |
301 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
302 | 16, /* bitsize */ | |
303 | true, /* pc_relative */ | |
304 | 0, /* bitpos */ | |
305 | complain_overflow_signed, /* complain_on_overflow */ | |
306 | 0, /* special_function */ | |
307 | "SREL16", /* name */ | |
308 | true, /* partial_inplace */ | |
309 | 0xffff, /* src_mask */ | |
310 | 0xffff, /* dst_mask */ | |
311 | false), /* pcrel_offset */ | |
312 | ||
313 | /* 32 bit PC relative offset. */ | |
314 | HOWTO (ALPHA_R_SREL32, /* type */ | |
315 | 0, /* rightshift */ | |
316 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
317 | 32, /* bitsize */ | |
318 | true, /* pc_relative */ | |
319 | 0, /* bitpos */ | |
320 | complain_overflow_signed, /* complain_on_overflow */ | |
321 | 0, /* special_function */ | |
322 | "SREL32", /* name */ | |
323 | true, /* partial_inplace */ | |
324 | 0xffffffff, /* src_mask */ | |
325 | 0xffffffff, /* dst_mask */ | |
326 | false), /* pcrel_offset */ | |
327 | ||
328 | /* A 64 bit PC relative offset. */ | |
329 | HOWTO (ALPHA_R_SREL64, /* type */ | |
330 | 0, /* rightshift */ | |
331 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
332 | 64, /* bitsize */ | |
333 | true, /* pc_relative */ | |
334 | 0, /* bitpos */ | |
335 | complain_overflow_signed, /* complain_on_overflow */ | |
336 | 0, /* special_function */ | |
337 | "SREL64", /* name */ | |
338 | true, /* partial_inplace */ | |
339 | MINUS_ONE, /* src_mask */ | |
340 | MINUS_ONE, /* dst_mask */ | |
341 | false), /* pcrel_offset */ | |
342 | ||
343 | /* Push a value on the reloc evaluation stack. */ | |
344 | HOWTO (ALPHA_R_OP_PUSH, /* type */ | |
345 | 0, /* rightshift */ | |
346 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
347 | 0, /* bitsize */ | |
348 | false, /* pc_relative */ | |
349 | 0, /* bitpos */ | |
350 | complain_overflow_dont, /* complain_on_overflow */ | |
351 | 0, /* special_function */ | |
352 | "OP_PUSH", /* name */ | |
353 | false, /* partial_inplace */ | |
354 | 0, /* src_mask */ | |
355 | 0, /* dst_mask */ | |
356 | false), /* pcrel_offset */ | |
357 | ||
358 | /* Store the value from the stack at the given address. Store it in | |
359 | a bitfield of size r_size starting at bit position r_offset. */ | |
360 | HOWTO (ALPHA_R_OP_STORE, /* type */ | |
361 | 0, /* rightshift */ | |
362 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
363 | 64, /* bitsize */ | |
364 | false, /* pc_relative */ | |
365 | 0, /* bitpos */ | |
366 | complain_overflow_dont, /* complain_on_overflow */ | |
367 | 0, /* special_function */ | |
368 | "OP_STORE", /* name */ | |
369 | false, /* partial_inplace */ | |
370 | 0, /* src_mask */ | |
371 | MINUS_ONE, /* dst_mask */ | |
372 | false), /* pcrel_offset */ | |
373 | ||
374 | /* Subtract the reloc address from the value on the top of the | |
375 | relocation stack. */ | |
376 | HOWTO (ALPHA_R_OP_PSUB, /* type */ | |
377 | 0, /* rightshift */ | |
378 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
379 | 0, /* bitsize */ | |
380 | false, /* pc_relative */ | |
381 | 0, /* bitpos */ | |
382 | complain_overflow_dont, /* complain_on_overflow */ | |
383 | 0, /* special_function */ | |
384 | "OP_PSUB", /* name */ | |
385 | false, /* partial_inplace */ | |
386 | 0, /* src_mask */ | |
387 | 0, /* dst_mask */ | |
388 | false), /* pcrel_offset */ | |
389 | ||
390 | /* Shift the value on the top of the relocation stack right by the | |
391 | given value. */ | |
392 | HOWTO (ALPHA_R_OP_PRSHIFT, /* type */ | |
393 | 0, /* rightshift */ | |
394 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
395 | 0, /* bitsize */ | |
396 | false, /* pc_relative */ | |
397 | 0, /* bitpos */ | |
398 | complain_overflow_dont, /* complain_on_overflow */ | |
399 | 0, /* special_function */ | |
400 | "OP_PRSHIFT", /* name */ | |
401 | false, /* partial_inplace */ | |
402 | 0, /* src_mask */ | |
403 | 0, /* dst_mask */ | |
404 | false), /* pcrel_offset */ | |
405 | ||
406 | /* Adjust the GP value for a new range in the object file. */ | |
407 | HOWTO (ALPHA_R_GPVALUE, /* type */ | |
408 | 0, /* rightshift */ | |
409 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
410 | 0, /* bitsize */ | |
411 | false, /* pc_relative */ | |
412 | 0, /* bitpos */ | |
413 | complain_overflow_dont, /* complain_on_overflow */ | |
414 | 0, /* special_function */ | |
415 | "GPVALUE", /* name */ | |
416 | false, /* partial_inplace */ | |
417 | 0, /* src_mask */ | |
418 | 0, /* dst_mask */ | |
419 | false) /* pcrel_offset */ | |
dae31cf5 ILT |
420 | }; |
421 | \f | |
3f048f7f ILT |
422 | /* Recognize an Alpha ECOFF file. */ |
423 | ||
424 | static bfd_target * | |
425 | alpha_ecoff_object_p (abfd) | |
426 | bfd *abfd; | |
427 | { | |
428 | static bfd_target *ret; | |
429 | ||
430 | ret = coff_object_p (abfd); | |
431 | ||
432 | if (ret != (bfd_target *) NULL) | |
433 | { | |
434 | asection *sec; | |
435 | ||
436 | /* Alpha ECOFF has a .pdata section. The lnnoptr field of the | |
437 | .pdata section is the number of entries it contains. Each | |
438 | entry takes up 8 bytes. The number of entries is required | |
439 | since the section is aligned to a 16 byte boundary. When we | |
440 | link .pdata sections together, we do not want to include the | |
441 | alignment bytes. We handle this on input by faking the size | |
442 | of the .pdata section to remove the unwanted alignment bytes. | |
443 | On output we will set the lnnoptr field and force the | |
444 | alignment. */ | |
445 | sec = bfd_get_section_by_name (abfd, _PDATA); | |
446 | if (sec != (asection *) NULL) | |
447 | { | |
448 | bfd_size_type size; | |
449 | ||
450 | size = sec->line_filepos * 8; | |
451 | BFD_ASSERT (size == bfd_section_size (abfd, sec) | |
452 | || size + 8 == bfd_section_size (abfd, sec)); | |
453 | if (! bfd_set_section_size (abfd, sec, size)) | |
454 | return NULL; | |
455 | } | |
456 | } | |
457 | ||
458 | return ret; | |
459 | } | |
460 | ||
5f8f6d56 SC |
461 | /* See whether the magic number matches. */ |
462 | ||
463 | static boolean | |
dae31cf5 | 464 | alpha_ecoff_bad_format_hook (abfd, filehdr) |
5f8f6d56 SC |
465 | bfd *abfd; |
466 | PTR filehdr; | |
467 | { | |
468 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
469 | ||
dae31cf5 | 470 | if (ALPHA_ECOFF_BADMAG (*internal_f)) |
5f8f6d56 SC |
471 | return false; |
472 | ||
473 | return true; | |
474 | } | |
693f8191 KR |
475 | \f |
476 | /* Reloc handling. */ | |
5f8f6d56 | 477 | |
693f8191 | 478 | /* Swap a reloc in. */ |
5f8f6d56 | 479 | |
693f8191 KR |
480 | static void |
481 | alpha_ecoff_swap_reloc_in (abfd, ext_ptr, intern) | |
5f8f6d56 | 482 | bfd *abfd; |
693f8191 KR |
483 | PTR ext_ptr; |
484 | struct internal_reloc *intern; | |
5f8f6d56 | 485 | { |
693f8191 KR |
486 | const RELOC *ext = (RELOC *) ext_ptr; |
487 | ||
488 | intern->r_vaddr = bfd_h_get_64 (abfd, (bfd_byte *) ext->r_vaddr); | |
489 | intern->r_symndx = bfd_h_get_32 (abfd, (bfd_byte *) ext->r_symndx); | |
490 | ||
491 | BFD_ASSERT (abfd->xvec->header_byteorder_big_p == false); | |
492 | ||
493 | intern->r_type = ((ext->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
494 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
495 | intern->r_extern = (ext->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
496 | intern->r_offset = ((ext->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
497 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
498 | /* Ignored the reserved bits. */ | |
499 | intern->r_size = ((ext->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
500 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
501 | ||
502 | if (intern->r_type == ALPHA_R_LITUSE | |
503 | || intern->r_type == ALPHA_R_GPDISP) | |
504 | { | |
505 | /* Handle the LITUSE and GPDISP relocs specially. Its symndx | |
506 | value is not actually a symbol index, but is instead a | |
507 | special code. We put the code in the r_size field, and | |
508 | clobber the symndx. */ | |
509 | if (intern->r_size != 0) | |
510 | abort (); | |
511 | intern->r_size = intern->r_symndx; | |
512 | intern->r_symndx = RELOC_SECTION_NONE; | |
513 | } | |
514 | else if (intern->r_type == ALPHA_R_IGNORE) | |
5f8f6d56 | 515 | { |
693f8191 KR |
516 | /* The IGNORE reloc generally follows a GPDISP reloc, and is |
517 | against the .lita section. The section is irrelevant. */ | |
518 | if (! intern->r_extern && | |
519 | (intern->r_symndx == RELOC_SECTION_NONE | |
520 | || intern->r_symndx == RELOC_SECTION_ABS)) | |
521 | abort (); | |
522 | if (! intern->r_extern && intern->r_symndx == RELOC_SECTION_LITA) | |
523 | intern->r_symndx = RELOC_SECTION_NONE; | |
5f8f6d56 | 524 | } |
693f8191 KR |
525 | } |
526 | ||
527 | /* Swap a reloc out. */ | |
5f8f6d56 | 528 | |
693f8191 KR |
529 | static void |
530 | alpha_ecoff_swap_reloc_out (abfd, intern, dst) | |
531 | bfd *abfd; | |
532 | const struct internal_reloc *intern; | |
533 | PTR dst; | |
534 | { | |
535 | RELOC *ext = (RELOC *) dst; | |
536 | long symndx; | |
537 | unsigned char size; | |
538 | ||
539 | /* Undo the hackery done in swap_reloc_in. */ | |
540 | if (intern->r_type == ALPHA_R_LITUSE | |
541 | || intern->r_type == ALPHA_R_GPDISP) | |
542 | { | |
543 | symndx = intern->r_size; | |
544 | size = 0; | |
545 | } | |
546 | else if (intern->r_type == ALPHA_R_IGNORE | |
547 | && ! intern->r_extern | |
548 | && intern->r_symndx == RELOC_SECTION_NONE) | |
549 | { | |
550 | symndx = RELOC_SECTION_LITA; | |
551 | size = intern->r_size; | |
552 | } | |
553 | else | |
554 | { | |
555 | symndx = intern->r_symndx; | |
556 | size = intern->r_size; | |
557 | } | |
dae31cf5 | 558 | |
693f8191 KR |
559 | BFD_ASSERT (intern->r_extern |
560 | || (intern->r_symndx >= 0 && intern->r_symndx <= 14)); | |
5f8f6d56 | 561 | |
693f8191 KR |
562 | bfd_h_put_64 (abfd, intern->r_vaddr, (bfd_byte *) ext->r_vaddr); |
563 | bfd_h_put_32 (abfd, symndx, (bfd_byte *) ext->r_symndx); | |
564 | ||
565 | BFD_ASSERT (abfd->xvec->header_byteorder_big_p == false); | |
566 | ||
567 | ext->r_bits[0] = ((intern->r_type << RELOC_BITS0_TYPE_SH_LITTLE) | |
568 | & RELOC_BITS0_TYPE_LITTLE); | |
569 | ext->r_bits[1] = ((intern->r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0) | |
570 | | ((intern->r_offset << RELOC_BITS1_OFFSET_SH_LITTLE) | |
571 | & RELOC_BITS1_OFFSET_LITTLE)); | |
572 | ext->r_bits[2] = 0; | |
573 | ext->r_bits[3] = ((size << RELOC_BITS3_SIZE_SH_LITTLE) | |
574 | & RELOC_BITS3_SIZE_LITTLE); | |
5f8f6d56 SC |
575 | } |
576 | ||
693f8191 KR |
577 | /* Finish canonicalizing a reloc. Part of this is generic to all |
578 | ECOFF targets, and that part is in ecoff.c. The rest is done in | |
579 | this backend routine. It must fill in the howto field. */ | |
5f8f6d56 | 580 | |
693f8191 KR |
581 | static void |
582 | alpha_adjust_reloc_in (abfd, intern, rptr) | |
5f8f6d56 | 583 | bfd *abfd; |
693f8191 KR |
584 | const struct internal_reloc *intern; |
585 | arelent *rptr; | |
5f8f6d56 | 586 | { |
693f8191 KR |
587 | if (intern->r_type > ALPHA_R_GPVALUE) |
588 | abort (); | |
5f8f6d56 | 589 | |
693f8191 KR |
590 | switch (intern->r_type) |
591 | { | |
592 | case ALPHA_R_BRADDR: | |
593 | case ALPHA_R_SREL16: | |
594 | case ALPHA_R_SREL32: | |
595 | case ALPHA_R_SREL64: | |
596 | /* The PC relative relocs do not seem to use the section VMA as | |
597 | a negative addend. */ | |
598 | rptr->addend = 0; | |
599 | break; | |
5f8f6d56 | 600 | |
693f8191 KR |
601 | case ALPHA_R_GPREL32: |
602 | case ALPHA_R_LITERAL: | |
603 | /* Copy the gp value for this object file into the addend, to | |
604 | ensure that we are not confused by the linker. */ | |
605 | if (! intern->r_extern) | |
606 | rptr->addend += ecoff_data (abfd)->gp; | |
607 | break; | |
5f8f6d56 | 608 | |
693f8191 KR |
609 | case ALPHA_R_LITUSE: |
610 | case ALPHA_R_GPDISP: | |
611 | /* The LITUSE and GPDISP relocs do not use a symbol, or an | |
612 | addend, but they do use a special code. Put this code in the | |
613 | addend field. */ | |
614 | rptr->addend = intern->r_size; | |
615 | break; | |
616 | ||
617 | case ALPHA_R_OP_STORE: | |
618 | /* The STORE reloc needs the size and offset fields. We store | |
619 | them in the addend. */ | |
620 | BFD_ASSERT (intern->r_offset <= 256 && intern->r_size <= 256); | |
621 | rptr->addend = (intern->r_offset << 8) + intern->r_size; | |
622 | break; | |
623 | ||
624 | case ALPHA_R_OP_PUSH: | |
625 | case ALPHA_R_OP_PSUB: | |
626 | case ALPHA_R_OP_PRSHIFT: | |
627 | /* The PUSH, PSUB and PRSHIFT relocs do not actually use an | |
628 | address. I believe that the address supplied is really an | |
629 | addend. */ | |
630 | rptr->addend = intern->r_vaddr; | |
631 | break; | |
632 | ||
633 | case ALPHA_R_GPVALUE: | |
634 | /* Set the addend field to the new GP value. */ | |
635 | rptr->addend = intern->r_symndx + ecoff_data (abfd)->gp; | |
636 | break; | |
637 | ||
638 | case ALPHA_R_IGNORE: | |
639 | /* If the type is ALPHA_R_IGNORE, make sure this is a reference | |
640 | to the absolute section so that the reloc is ignored. For | |
641 | some reason the address of this reloc type is not adjusted by | |
642 | the section vma. We record the gp value for this object file | |
643 | here, for convenience when doing the GPDISP relocation. */ | |
644 | rptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
645 | rptr->address = intern->r_vaddr; | |
646 | rptr->addend = ecoff_data (abfd)->gp; | |
647 | break; | |
648 | ||
649 | default: | |
650 | break; | |
5f8f6d56 SC |
651 | } |
652 | ||
693f8191 | 653 | rptr->howto = &alpha_howto_table[intern->r_type]; |
5f8f6d56 | 654 | } |
5f8f6d56 | 655 | |
693f8191 KR |
656 | /* When writing out a reloc we need to pull some values back out of |
657 | the addend field into the reloc. This is roughly the reverse of | |
658 | alpha_adjust_reloc_in, except that there are several changes we do | |
659 | not need to undo. */ | |
5f8f6d56 SC |
660 | |
661 | static void | |
693f8191 | 662 | alpha_adjust_reloc_out (abfd, rel, intern) |
5f8f6d56 | 663 | bfd *abfd; |
693f8191 | 664 | const arelent *rel; |
dae31cf5 | 665 | struct internal_reloc *intern; |
5f8f6d56 | 666 | { |
693f8191 KR |
667 | switch (intern->r_type) |
668 | { | |
669 | case ALPHA_R_LITUSE: | |
670 | case ALPHA_R_GPDISP: | |
671 | intern->r_size = rel->addend; | |
672 | break; | |
673 | ||
674 | case ALPHA_R_OP_STORE: | |
675 | intern->r_size = rel->addend & 0xff; | |
676 | intern->r_offset = (rel->addend >> 8) & 0xff; | |
677 | break; | |
678 | ||
679 | case ALPHA_R_OP_PUSH: | |
680 | case ALPHA_R_OP_PSUB: | |
681 | case ALPHA_R_OP_PRSHIFT: | |
682 | intern->r_vaddr = rel->addend; | |
683 | break; | |
684 | ||
685 | case ALPHA_R_IGNORE: | |
686 | intern->r_vaddr = rel->address; | |
687 | if (intern->r_symndx == RELOC_SECTION_ABS) | |
688 | intern->r_symndx = RELOC_SECTION_NONE; | |
689 | break; | |
690 | ||
691 | default: | |
692 | break; | |
693 | } | |
694 | } | |
695 | ||
696 | /* The size of the stack for the relocation evaluator. */ | |
697 | #define RELOC_STACKSIZE (10) | |
698 | ||
699 | /* Alpha ECOFF relocs have a built in expression evaluator as well as | |
700 | other interdependencies. Rather than use a bunch of special | |
701 | functions and global variables, we use a single routine to do all | |
702 | the relocation for a section. I haven't yet worked out how the | |
703 | assembler is going to handle this. */ | |
704 | ||
705 | static bfd_byte * | |
706 | alpha_ecoff_get_relocated_section_contents (abfd, link_info, link_order, | |
707 | data, relocateable, symbols) | |
708 | bfd *abfd; | |
709 | struct bfd_link_info *link_info; | |
710 | struct bfd_link_order *link_order; | |
711 | bfd_byte *data; | |
712 | boolean relocateable; | |
713 | asymbol **symbols; | |
714 | { | |
715 | bfd *input_bfd = link_order->u.indirect.section->owner; | |
716 | asection *input_section = link_order->u.indirect.section; | |
717 | size_t reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); | |
718 | arelent **reloc_vector = (arelent **) alloca (reloc_size); | |
719 | bfd *output_bfd = relocateable ? abfd : (bfd *) NULL; | |
720 | bfd_vma gp; | |
721 | boolean gp_undefined; | |
722 | bfd_vma stack[RELOC_STACKSIZE]; | |
723 | int tos = 0; | |
724 | ||
725 | if (! bfd_get_section_contents (input_bfd, input_section, data, | |
726 | (file_ptr) 0, input_section->_raw_size)) | |
727 | return NULL; | |
5f8f6d56 | 728 | |
693f8191 KR |
729 | /* The section size is not going to change. */ |
730 | input_section->_cooked_size = input_section->_raw_size; | |
731 | input_section->reloc_done = true; | |
732 | ||
733 | if (bfd_canonicalize_reloc (input_bfd, input_section, reloc_vector, | |
734 | symbols) | |
735 | == 0) | |
736 | return data; | |
737 | ||
738 | /* Get the GP value for the output BFD. */ | |
739 | gp_undefined = false; | |
740 | if (ecoff_data (abfd)->gp == 0) | |
5f8f6d56 | 741 | { |
693f8191 KR |
742 | if (relocateable != false) |
743 | { | |
744 | asection *sec; | |
745 | bfd_vma lo; | |
746 | ||
747 | /* Make up a value. */ | |
748 | lo = (bfd_vma) -1; | |
749 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
750 | { | |
751 | if (sec->vma < lo | |
752 | && (strcmp (sec->name, ".sbss") == 0 | |
753 | || strcmp (sec->name, ".sdata") == 0 | |
754 | || strcmp (sec->name, ".lit4") == 0 | |
755 | || strcmp (sec->name, ".lit8") == 0 | |
756 | || strcmp (sec->name, ".lita") == 0)) | |
757 | lo = sec->vma; | |
758 | } | |
759 | ecoff_data (abfd)->gp = lo + 0x8000; | |
760 | } | |
761 | else | |
762 | { | |
763 | struct bfd_link_hash_entry *h; | |
764 | ||
765 | h = bfd_link_hash_lookup (link_info->hash, "_gp", false, false, | |
766 | true); | |
767 | if (h == (struct bfd_link_hash_entry *) NULL | |
768 | || h->type != bfd_link_hash_defined) | |
769 | gp_undefined = true; | |
770 | else | |
771 | ecoff_data (abfd)->gp = (h->u.def.value | |
772 | + h->u.def.section->output_section->vma | |
773 | + h->u.def.section->output_offset); | |
774 | } | |
5f8f6d56 | 775 | } |
693f8191 KR |
776 | gp = ecoff_data (abfd)->gp; |
777 | ||
778 | for (; *reloc_vector != (arelent *) NULL; reloc_vector++) | |
5f8f6d56 | 779 | { |
693f8191 KR |
780 | arelent *rel; |
781 | bfd_reloc_status_type r; | |
782 | char *err; | |
783 | ||
784 | rel = *reloc_vector; | |
785 | r = bfd_reloc_ok; | |
786 | switch (rel->howto->type) | |
787 | { | |
788 | case ALPHA_R_IGNORE: | |
789 | rel->address += input_section->output_offset; | |
790 | break; | |
791 | ||
792 | case ALPHA_R_REFLONG: | |
793 | case ALPHA_R_REFQUAD: | |
794 | case ALPHA_R_BRADDR: | |
795 | case ALPHA_R_HINT: | |
796 | case ALPHA_R_SREL16: | |
797 | case ALPHA_R_SREL32: | |
798 | case ALPHA_R_SREL64: | |
799 | if (relocateable | |
800 | && ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
801 | { | |
802 | rel->address += input_section->output_offset; | |
803 | break; | |
804 | } | |
805 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
806 | output_bfd, &err); | |
807 | break; | |
808 | ||
809 | case ALPHA_R_GPREL32: | |
810 | /* This relocation is used in a switch table. It is a 32 | |
811 | bit offset from the current GP value. We must adjust it | |
812 | by the different between the original GP value and the | |
813 | current GP value. The original GP value is stored in the | |
814 | addend. We adjust the addend and let | |
815 | bfd_perform_relocation finish the job. */ | |
816 | rel->addend -= gp; | |
817 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
818 | output_bfd, &err); | |
819 | if (r == bfd_reloc_ok && gp_undefined) | |
820 | { | |
821 | r = bfd_reloc_dangerous; | |
822 | err = (char *) "GP relative relocation used when GP not defined"; | |
823 | } | |
824 | break; | |
825 | ||
826 | case ALPHA_R_LITERAL: | |
827 | /* This is a reference to a literal value, generally | |
828 | (always?) in the .lita section. This is a 16 bit GP | |
829 | relative relocation. Sometimes the subsequent reloc is a | |
830 | LITUSE reloc, which indicates how this reloc is used. | |
831 | This sometimes permits rewriting the two instructions | |
832 | referred to by the LITERAL and the LITUSE into different | |
833 | instructions which do not refer to .lita. This can save | |
834 | a memory reference, and permits removing a value from | |
835 | .lita thus saving GP relative space. | |
836 | ||
837 | We do not these optimizations. To do them we would need | |
838 | to arrange to link the .lita section first, so that by | |
839 | the time we got here we would know the final values to | |
840 | use. This would not be particularly difficult, but it is | |
841 | not currently implemented. */ | |
842 | ||
843 | { | |
844 | unsigned long insn; | |
845 | ||
846 | /* I believe that the LITERAL reloc will only apply to a | |
fa965415 | 847 | ldq or ldl instruction, so check my assumption. */ |
693f8191 | 848 | insn = bfd_get_32 (input_bfd, data + rel->address); |
fa965415 KR |
849 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 |
850 | || ((insn >> 26) & 0x3f) == 0x28); | |
693f8191 KR |
851 | |
852 | rel->addend -= gp; | |
853 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
854 | output_bfd, &err); | |
855 | if (r == bfd_reloc_ok && gp_undefined) | |
856 | { | |
857 | r = bfd_reloc_dangerous; | |
858 | err = | |
859 | (char *) "GP relative relocation used when GP not defined"; | |
860 | } | |
861 | } | |
862 | break; | |
863 | ||
864 | case ALPHA_R_LITUSE: | |
865 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
866 | does not cause anything to happen, itself. */ | |
867 | rel->address += input_section->output_offset; | |
868 | break; | |
869 | ||
870 | case ALPHA_R_GPDISP: | |
871 | /* This marks the ldah of an ldah/lda pair which loads the | |
872 | gp register with the difference of the gp value and the | |
873 | current location. The second of the pair is r_size bytes | |
874 | ahead, and is marked with an ALPHA_R_IGNORE reloc. */ | |
875 | { | |
876 | unsigned long insn1, insn2; | |
877 | bfd_vma addend; | |
878 | ||
879 | BFD_ASSERT (reloc_vector[1] != NULL | |
880 | && reloc_vector[1]->howto->type == ALPHA_R_IGNORE | |
881 | && (rel->address + rel->addend | |
882 | == reloc_vector[1]->address)); | |
883 | ||
884 | /* Get the two instructions. */ | |
885 | insn1 = bfd_get_32 (input_bfd, data + rel->address); | |
886 | insn2 = bfd_get_32 (input_bfd, data + rel->address + rel->addend); | |
887 | ||
888 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
889 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
890 | ||
891 | /* Get the existing addend. We must account for the sign | |
892 | extension done by lda and ldah. */ | |
893 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
894 | if (insn1 & 0x8000) | |
895 | { | |
896 | addend -= 0x80000000; | |
897 | addend -= 0x80000000; | |
898 | } | |
899 | if (insn2 & 0x8000) | |
900 | addend -= 0x10000; | |
901 | ||
902 | /* The existing addend includes the different between the | |
903 | gp of the input BFD and the address in the input BFD. | |
904 | Subtract this out. */ | |
905 | addend -= (reloc_vector[1]->addend | |
906 | - (input_section->vma + rel->address)); | |
907 | ||
908 | /* Now add in the final gp value, and subtract out the | |
909 | final address. */ | |
910 | addend += (gp | |
911 | - (input_section->output_section->vma | |
912 | + input_section->output_offset | |
913 | + rel->address)); | |
914 | ||
915 | /* Change the instructions, accounting for the sign | |
916 | extension, and write them out. */ | |
917 | if (addend & 0x8000) | |
918 | addend += 0x10000; | |
919 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
920 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
921 | ||
922 | bfd_put_32 (input_bfd, (bfd_vma) insn1, data + rel->address); | |
923 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
924 | data + rel->address + rel->addend); | |
925 | ||
926 | rel->address += input_section->output_offset; | |
927 | } | |
928 | break; | |
929 | ||
930 | case ALPHA_R_OP_PUSH: | |
931 | /* Push a value on the reloc evaluation stack. */ | |
932 | { | |
933 | asymbol *symbol; | |
934 | bfd_vma relocation; | |
935 | ||
936 | if (relocateable) | |
937 | { | |
938 | rel->address += input_section->output_offset; | |
939 | break; | |
940 | } | |
941 | ||
942 | /* Figure out the relocation of this symbol. */ | |
943 | symbol = *rel->sym_ptr_ptr; | |
944 | ||
945 | if (symbol->section == &bfd_und_section) | |
946 | r = bfd_reloc_undefined; | |
947 | ||
948 | if (bfd_is_com_section (symbol->section)) | |
949 | relocation = 0; | |
950 | else | |
951 | relocation = symbol->value; | |
952 | relocation += symbol->section->output_section->vma; | |
953 | relocation += symbol->section->output_offset; | |
954 | relocation += rel->addend; | |
955 | ||
956 | if (tos >= RELOC_STACKSIZE) | |
957 | abort (); | |
958 | ||
959 | stack[tos++] = relocation; | |
960 | } | |
961 | break; | |
962 | ||
963 | case ALPHA_R_OP_STORE: | |
964 | /* Store a value from the reloc stack into a bitfield. */ | |
965 | { | |
966 | bfd_vma val; | |
967 | int offset, size; | |
968 | ||
969 | if (relocateable) | |
970 | { | |
971 | rel->address += input_section->output_offset; | |
972 | break; | |
973 | } | |
974 | ||
975 | if (tos == 0) | |
976 | abort (); | |
977 | ||
978 | /* The offset and size for this reloc are encoded into the | |
979 | addend field by alpha_adjust_reloc_in. */ | |
980 | offset = (rel->addend >> 8) & 0xff; | |
981 | size = rel->addend & 0xff; | |
982 | ||
983 | val = bfd_get_64 (abfd, data + rel->address); | |
984 | val &=~ (((1 << size) - 1) << offset); | |
985 | val |= (stack[--tos] & ((1 << size) - 1)) << offset; | |
986 | bfd_put_64 (abfd, val, data + rel->address); | |
987 | } | |
988 | break; | |
989 | ||
990 | case ALPHA_R_OP_PSUB: | |
991 | /* Subtract a value from the top of the stack. */ | |
992 | { | |
993 | asymbol *symbol; | |
994 | bfd_vma relocation; | |
995 | ||
996 | if (relocateable) | |
997 | { | |
998 | rel->address += input_section->output_offset; | |
999 | break; | |
1000 | } | |
1001 | ||
1002 | /* Figure out the relocation of this symbol. */ | |
1003 | symbol = *rel->sym_ptr_ptr; | |
1004 | ||
1005 | if (symbol->section == &bfd_und_section) | |
1006 | r = bfd_reloc_undefined; | |
1007 | ||
1008 | if (bfd_is_com_section (symbol->section)) | |
1009 | relocation = 0; | |
1010 | else | |
1011 | relocation = symbol->value; | |
1012 | relocation += symbol->section->output_section->vma; | |
1013 | relocation += symbol->section->output_offset; | |
1014 | relocation += rel->addend; | |
1015 | ||
1016 | if (tos == 0) | |
1017 | abort (); | |
1018 | ||
1019 | stack[tos - 1] -= relocation; | |
1020 | } | |
1021 | break; | |
1022 | ||
1023 | case ALPHA_R_OP_PRSHIFT: | |
1024 | /* Shift the value on the top of the stack. */ | |
1025 | { | |
1026 | asymbol *symbol; | |
1027 | bfd_vma relocation; | |
1028 | ||
1029 | if (relocateable) | |
1030 | { | |
1031 | rel->address += input_section->output_offset; | |
1032 | break; | |
1033 | } | |
1034 | ||
1035 | /* Figure out the relocation of this symbol. */ | |
1036 | symbol = *rel->sym_ptr_ptr; | |
1037 | ||
1038 | if (symbol->section == &bfd_und_section) | |
1039 | r = bfd_reloc_undefined; | |
1040 | ||
1041 | if (bfd_is_com_section (symbol->section)) | |
1042 | relocation = 0; | |
1043 | else | |
1044 | relocation = symbol->value; | |
1045 | relocation += symbol->section->output_section->vma; | |
1046 | relocation += symbol->section->output_offset; | |
1047 | relocation += rel->addend; | |
1048 | ||
1049 | if (tos == 0) | |
1050 | abort (); | |
1051 | ||
1052 | stack[tos - 1] >>= relocation; | |
1053 | } | |
1054 | break; | |
1055 | ||
1056 | case ALPHA_R_GPVALUE: | |
1057 | /* I really don't know if this does the right thing. */ | |
1058 | gp = rel->addend; | |
1059 | gp_undefined = false; | |
1060 | break; | |
1061 | ||
1062 | default: | |
1063 | abort (); | |
1064 | } | |
1065 | ||
1066 | if (relocateable) | |
1067 | { | |
1068 | asection *os = input_section->output_section; | |
1069 | ||
1070 | /* A partial link, so keep the relocs. */ | |
1071 | os->orelocation[os->reloc_count] = rel; | |
1072 | os->reloc_count++; | |
1073 | } | |
1074 | ||
1075 | if (r != bfd_reloc_ok) | |
1076 | { | |
1077 | switch (r) | |
1078 | { | |
1079 | case bfd_reloc_undefined: | |
1080 | if (! ((*link_info->callbacks->undefined_symbol) | |
1081 | (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr), | |
1082 | input_bfd, input_section, rel->address))) | |
1083 | return NULL; | |
1084 | break; | |
1085 | case bfd_reloc_dangerous: | |
1086 | if (! ((*link_info->callbacks->reloc_dangerous) | |
1087 | (link_info, err, input_bfd, input_section, | |
1088 | rel->address))) | |
1089 | return NULL; | |
1090 | break; | |
1091 | case bfd_reloc_overflow: | |
1092 | if (! ((*link_info->callbacks->reloc_overflow) | |
4991ebb9 ILT |
1093 | (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr), |
1094 | rel->howto->name, rel->addend, input_bfd, | |
1095 | input_section, rel->address))) | |
693f8191 KR |
1096 | return NULL; |
1097 | break; | |
1098 | case bfd_reloc_outofrange: | |
1099 | default: | |
1100 | abort (); | |
1101 | break; | |
1102 | } | |
1103 | } | |
5f8f6d56 | 1104 | } |
693f8191 KR |
1105 | |
1106 | if (tos != 0) | |
1107 | abort (); | |
1108 | ||
1109 | return data; | |
5f8f6d56 SC |
1110 | } |
1111 | ||
693f8191 | 1112 | /* Get the howto structure for a generic reloc type. */ |
5f8f6d56 | 1113 | |
693f8191 KR |
1114 | static CONST struct reloc_howto_struct * |
1115 | alpha_bfd_reloc_type_lookup (abfd, code) | |
5f8f6d56 | 1116 | bfd *abfd; |
693f8191 | 1117 | bfd_reloc_code_real_type code; |
5f8f6d56 | 1118 | { |
693f8191 | 1119 | int alpha_type; |
5f8f6d56 | 1120 | |
693f8191 | 1121 | switch (code) |
5f8f6d56 | 1122 | { |
693f8191 KR |
1123 | case BFD_RELOC_32: |
1124 | alpha_type = ALPHA_R_REFLONG; | |
1125 | break; | |
1126 | case BFD_RELOC_64: | |
1127 | alpha_type = ALPHA_R_REFQUAD; | |
1128 | break; | |
1129 | case BFD_RELOC_GPREL32: | |
1130 | alpha_type = ALPHA_R_GPREL32; | |
1131 | break; | |
1132 | case BFD_RELOC_ALPHA_LITERAL: | |
1133 | alpha_type = ALPHA_R_LITERAL; | |
1134 | break; | |
1135 | case BFD_RELOC_ALPHA_LITUSE: | |
1136 | alpha_type = ALPHA_R_LITUSE; | |
1137 | break; | |
1138 | case BFD_RELOC_ALPHA_GPDISP_HI16: | |
1139 | alpha_type = ALPHA_R_GPDISP; | |
1140 | break; | |
1141 | case BFD_RELOC_ALPHA_GPDISP_LO16: | |
1142 | alpha_type = ALPHA_R_IGNORE; | |
1143 | break; | |
1144 | case BFD_RELOC_23_PCREL_S2: | |
1145 | alpha_type = ALPHA_R_BRADDR; | |
1146 | break; | |
1147 | case BFD_RELOC_ALPHA_HINT: | |
1148 | alpha_type = ALPHA_R_HINT; | |
1149 | break; | |
1150 | case BFD_RELOC_16_PCREL: | |
1151 | alpha_type = ALPHA_R_SREL16; | |
1152 | break; | |
1153 | case BFD_RELOC_32_PCREL: | |
1154 | alpha_type = ALPHA_R_SREL32; | |
1155 | break; | |
1156 | case BFD_RELOC_64_PCREL: | |
1157 | alpha_type = ALPHA_R_SREL64; | |
1158 | break; | |
1159 | #if 0 | |
1160 | case ???: | |
1161 | alpha_type = ALPHA_R_OP_PUSH; | |
1162 | break; | |
1163 | case ???: | |
1164 | alpha_type = ALPHA_R_OP_STORE; | |
1165 | break; | |
1166 | case ???: | |
1167 | alpha_type = ALPHA_R_OP_PSUB; | |
1168 | break; | |
1169 | case ???: | |
1170 | alpha_type = ALPHA_R_OP_PRSHIFT; | |
1171 | break; | |
1172 | case ???: | |
1173 | alpha_type = ALPHA_R_GPVALUE; | |
1174 | break; | |
1175 | #endif | |
1176 | default: | |
1177 | return (CONST struct reloc_howto_struct *) NULL; | |
1178 | } | |
1179 | ||
1180 | return &alpha_howto_table[alpha_type]; | |
1181 | } | |
1182 | \f | |
1183 | /* A helper routine for alpha_relocate_section which converts an | |
1184 | external reloc when generating relocateable output. Returns the | |
1185 | relocation amount. */ | |
1186 | ||
1187 | static bfd_vma | |
1188 | alpha_convert_external_reloc (output_bfd, info, input_bfd, ext_rel, h) | |
1189 | bfd *output_bfd; | |
1190 | struct bfd_link_info *info; | |
1191 | bfd *input_bfd; | |
1192 | struct external_reloc *ext_rel; | |
1193 | struct ecoff_link_hash_entry *h; | |
1194 | { | |
1195 | unsigned long r_symndx; | |
1196 | bfd_vma relocation; | |
1197 | ||
1198 | BFD_ASSERT (info->relocateable); | |
1199 | ||
1200 | if (h->root.type == bfd_link_hash_defined) | |
1201 | { | |
1202 | asection *hsec; | |
1203 | const char *name; | |
1204 | ||
1205 | /* This symbol is defined in the output. Convert the reloc from | |
1206 | being against the symbol to being against the section. */ | |
1207 | ||
1208 | /* Clear the r_extern bit. */ | |
1209 | ext_rel->r_bits[1] &=~ RELOC_BITS1_EXTERN_LITTLE; | |
1210 | ||
1211 | /* Compute a new r_symndx value. */ | |
1212 | hsec = h->root.u.def.section; | |
1213 | name = bfd_get_section_name (output_bfd, hsec->output_section); | |
1214 | ||
1215 | r_symndx = -1; | |
1216 | switch (name[1]) | |
1217 | { | |
1218 | case 'A': | |
1219 | if (strcmp (name, "*ABS*") == 0) | |
1220 | r_symndx = RELOC_SECTION_ABS; | |
1221 | break; | |
1222 | case 'b': | |
1223 | if (strcmp (name, ".bss") == 0) | |
1224 | r_symndx = RELOC_SECTION_BSS; | |
1225 | break; | |
1226 | case 'd': | |
1227 | if (strcmp (name, ".data") == 0) | |
1228 | r_symndx = RELOC_SECTION_DATA; | |
1229 | break; | |
1230 | case 'f': | |
1231 | if (strcmp (name, ".fini") == 0) | |
1232 | r_symndx = RELOC_SECTION_FINI; | |
1233 | break; | |
1234 | case 'i': | |
1235 | if (strcmp (name, ".init") == 0) | |
1236 | r_symndx = RELOC_SECTION_INIT; | |
1237 | break; | |
1238 | case 'l': | |
1239 | if (strcmp (name, ".lita") == 0) | |
1240 | r_symndx = RELOC_SECTION_LITA; | |
1241 | else if (strcmp (name, ".lit8") == 0) | |
1242 | r_symndx = RELOC_SECTION_LIT8; | |
1243 | else if (strcmp (name, ".lit4") == 0) | |
1244 | r_symndx = RELOC_SECTION_LIT4; | |
1245 | break; | |
1246 | case 'p': | |
1247 | if (strcmp (name, ".pdata") == 0) | |
1248 | r_symndx = RELOC_SECTION_PDATA; | |
1249 | break; | |
1250 | case 'r': | |
1251 | if (strcmp (name, ".rdata") == 0) | |
1252 | r_symndx = RELOC_SECTION_RDATA; | |
1253 | break; | |
1254 | case 's': | |
1255 | if (strcmp (name, ".sdata") == 0) | |
1256 | r_symndx = RELOC_SECTION_SDATA; | |
1257 | else if (strcmp (name, ".sbss") == 0) | |
1258 | r_symndx = RELOC_SECTION_SBSS; | |
1259 | break; | |
1260 | case 't': | |
1261 | if (strcmp (name, ".text") == 0) | |
1262 | r_symndx = RELOC_SECTION_TEXT; | |
1263 | break; | |
1264 | case 'x': | |
1265 | if (strcmp (name, ".xdata") == 0) | |
1266 | r_symndx = RELOC_SECTION_XDATA; | |
1267 | break; | |
1268 | } | |
1269 | ||
1270 | if (r_symndx == -1) | |
1271 | abort (); | |
1272 | ||
1273 | /* Add the section VMA and the symbol value. */ | |
1274 | relocation = (h->root.u.def.value | |
1275 | + hsec->output_section->vma | |
1276 | + hsec->output_offset); | |
5f8f6d56 | 1277 | } |
5f8f6d56 SC |
1278 | else |
1279 | { | |
693f8191 KR |
1280 | /* Change the symndx value to the right one for |
1281 | the output BFD. */ | |
1282 | r_symndx = h->indx; | |
1283 | if (r_symndx == -1) | |
1284 | { | |
1285 | /* Caller must give an error. */ | |
1286 | r_symndx = 0; | |
1287 | } | |
1288 | relocation = 0; | |
5f8f6d56 | 1289 | } |
693f8191 KR |
1290 | |
1291 | /* Write out the new r_symndx value. */ | |
1292 | bfd_h_put_32 (input_bfd, (bfd_vma) r_symndx, | |
1293 | (bfd_byte *) ext_rel->r_symndx); | |
1294 | ||
1295 | return relocation; | |
1296 | } | |
1297 | ||
1298 | /* Relocate a section while linking an Alpha ECOFF file. This is | |
1299 | quite similar to get_relocated_section_contents. Perhaps they | |
1300 | could be combined somehow. */ | |
1301 | ||
1302 | static boolean | |
1303 | alpha_relocate_section (output_bfd, info, input_bfd, input_section, | |
1304 | contents, external_relocs) | |
1305 | bfd *output_bfd; | |
1306 | struct bfd_link_info *info; | |
1307 | bfd *input_bfd; | |
1308 | asection *input_section; | |
1309 | bfd_byte *contents; | |
1310 | PTR external_relocs; | |
1311 | { | |
1312 | asection **symndx_to_section; | |
1313 | struct ecoff_link_hash_entry **sym_hashes; | |
1314 | bfd_vma gp; | |
1315 | boolean gp_undefined; | |
1316 | bfd_vma stack[RELOC_STACKSIZE]; | |
1317 | int tos = 0; | |
1318 | struct external_reloc *ext_rel; | |
1319 | struct external_reloc *ext_rel_end; | |
1320 | ||
1321 | /* We keep a table mapping the symndx found in an internal reloc to | |
1322 | the appropriate section. This is faster than looking up the | |
1323 | section by name each time. */ | |
1324 | symndx_to_section = ecoff_data (input_bfd)->symndx_to_section; | |
1325 | if (symndx_to_section == (asection **) NULL) | |
1326 | { | |
1327 | symndx_to_section = ((asection **) | |
1328 | bfd_alloc (input_bfd, | |
1329 | (NUM_RELOC_SECTIONS | |
1330 | * sizeof (asection *)))); | |
9783e04a DM |
1331 | if (!symndx_to_section) |
1332 | { | |
d1ad85a6 | 1333 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1334 | return false; |
1335 | } | |
693f8191 KR |
1336 | |
1337 | symndx_to_section[RELOC_SECTION_NONE] = NULL; | |
1338 | symndx_to_section[RELOC_SECTION_TEXT] = | |
1339 | bfd_get_section_by_name (input_bfd, ".text"); | |
1340 | symndx_to_section[RELOC_SECTION_RDATA] = | |
1341 | bfd_get_section_by_name (input_bfd, ".rdata"); | |
1342 | symndx_to_section[RELOC_SECTION_DATA] = | |
1343 | bfd_get_section_by_name (input_bfd, ".data"); | |
1344 | symndx_to_section[RELOC_SECTION_SDATA] = | |
1345 | bfd_get_section_by_name (input_bfd, ".sdata"); | |
1346 | symndx_to_section[RELOC_SECTION_SBSS] = | |
1347 | bfd_get_section_by_name (input_bfd, ".sbss"); | |
1348 | symndx_to_section[RELOC_SECTION_BSS] = | |
1349 | bfd_get_section_by_name (input_bfd, ".bss"); | |
1350 | symndx_to_section[RELOC_SECTION_INIT] = | |
1351 | bfd_get_section_by_name (input_bfd, ".init"); | |
1352 | symndx_to_section[RELOC_SECTION_LIT8] = | |
1353 | bfd_get_section_by_name (input_bfd, ".lit8"); | |
1354 | symndx_to_section[RELOC_SECTION_LIT4] = | |
1355 | bfd_get_section_by_name (input_bfd, ".lit4"); | |
1356 | symndx_to_section[RELOC_SECTION_XDATA] = | |
1357 | bfd_get_section_by_name (input_bfd, ".xdata"); | |
1358 | symndx_to_section[RELOC_SECTION_PDATA] = | |
1359 | bfd_get_section_by_name (input_bfd, ".pdata"); | |
1360 | symndx_to_section[RELOC_SECTION_FINI] = | |
1361 | bfd_get_section_by_name (input_bfd, ".fini"); | |
1362 | symndx_to_section[RELOC_SECTION_LITA] = | |
1363 | bfd_get_section_by_name (input_bfd, ".lita"); | |
1364 | symndx_to_section[RELOC_SECTION_ABS] = &bfd_abs_section; | |
1365 | ||
1366 | ecoff_data (input_bfd)->symndx_to_section = symndx_to_section; | |
1367 | } | |
1368 | ||
1369 | sym_hashes = ecoff_data (input_bfd)->sym_hashes; | |
1370 | ||
1371 | gp = ecoff_data (output_bfd)->gp; | |
1372 | if (gp == 0) | |
1373 | gp_undefined = true; | |
1374 | else | |
1375 | gp_undefined = false; | |
1376 | ||
1377 | BFD_ASSERT (output_bfd->xvec->header_byteorder_big_p == false); | |
1378 | BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p == false); | |
1379 | ||
1380 | ext_rel = (struct external_reloc *) external_relocs; | |
1381 | ext_rel_end = ext_rel + input_section->reloc_count; | |
1382 | for (; ext_rel < ext_rel_end; ext_rel++) | |
1383 | { | |
1384 | bfd_vma r_vaddr; | |
1385 | unsigned long r_symndx; | |
1386 | int r_type; | |
1387 | int r_extern; | |
1388 | int r_offset; | |
1389 | int r_size; | |
1390 | boolean relocatep; | |
1391 | boolean adjust_addrp; | |
1392 | boolean gp_usedp; | |
1393 | bfd_vma addend; | |
1394 | ||
1395 | r_vaddr = bfd_h_get_64 (input_bfd, (bfd_byte *) ext_rel->r_vaddr); | |
1396 | r_symndx = bfd_h_get_32 (input_bfd, (bfd_byte *) ext_rel->r_symndx); | |
1397 | ||
1398 | r_type = ((ext_rel->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
1399 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
1400 | r_extern = (ext_rel->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
1401 | r_offset = ((ext_rel->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
1402 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
1403 | /* Ignored the reserved bits. */ | |
1404 | r_size = ((ext_rel->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
1405 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
1406 | ||
1407 | relocatep = false; | |
1408 | adjust_addrp = true; | |
1409 | gp_usedp = false; | |
1410 | addend = 0; | |
1411 | ||
1412 | switch (r_type) | |
1413 | { | |
1414 | default: | |
1415 | abort (); | |
1416 | ||
1417 | case ALPHA_R_IGNORE: | |
1418 | /* This reloc appears after a GPDISP reloc. It marks the | |
1419 | position of the second instruction to be altered by the | |
1420 | GPDISP reloc, but is not otherwise used for anything. | |
1421 | For some reason, the address of the relocation does not | |
1422 | appear to include the section VMA, unlike the other | |
1423 | relocation types. */ | |
1424 | if (info->relocateable) | |
1425 | bfd_h_put_64 (input_bfd, | |
1426 | input_section->output_offset + r_vaddr, | |
1427 | (bfd_byte *) ext_rel->r_vaddr); | |
1428 | adjust_addrp = false; | |
1429 | break; | |
1430 | ||
1431 | case ALPHA_R_REFLONG: | |
1432 | case ALPHA_R_REFQUAD: | |
1433 | case ALPHA_R_BRADDR: | |
1434 | case ALPHA_R_HINT: | |
1435 | case ALPHA_R_SREL16: | |
1436 | case ALPHA_R_SREL32: | |
1437 | case ALPHA_R_SREL64: | |
1438 | relocatep = true; | |
1439 | break; | |
1440 | ||
1441 | case ALPHA_R_GPREL32: | |
1442 | /* This relocation is used in a switch table. It is a 32 | |
1443 | bit offset from the current GP value. We must adjust it | |
1444 | by the different between the original GP value and the | |
1445 | current GP value. */ | |
1446 | relocatep = true; | |
1447 | addend = ecoff_data (input_bfd)->gp - gp; | |
1448 | gp_usedp = true; | |
1449 | break; | |
1450 | ||
1451 | case ALPHA_R_LITERAL: | |
1452 | /* This is a reference to a literal value, generally | |
1453 | (always?) in the .lita section. This is a 16 bit GP | |
1454 | relative relocation. Sometimes the subsequent reloc is a | |
1455 | LITUSE reloc, which indicates how this reloc is used. | |
1456 | This sometimes permits rewriting the two instructions | |
1457 | referred to by the LITERAL and the LITUSE into different | |
1458 | instructions which do not refer to .lita. This can save | |
1459 | a memory reference, and permits removing a value from | |
1460 | .lita thus saving GP relative space. | |
1461 | ||
1462 | We do not these optimizations. To do them we would need | |
1463 | to arrange to link the .lita section first, so that by | |
1464 | the time we got here we would know the final values to | |
1465 | use. This would not be particularly difficult, but it is | |
1466 | not currently implemented. */ | |
1467 | ||
1468 | /* I believe that the LITERAL reloc will only apply to a ldq | |
9783e04a DM |
1469 | or ldl instruction, so check my assumption. */ |
1470 | { | |
1471 | unsigned long insn; | |
1472 | ||
1473 | insn = bfd_get_32 (input_bfd, | |
1474 | contents + r_vaddr - input_section->vma); | |
1475 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 | |
1476 | || ((insn >> 26) & 0x3f) == 0x28); | |
1477 | } | |
693f8191 KR |
1478 | |
1479 | relocatep = true; | |
1480 | addend = ecoff_data (input_bfd)->gp - gp; | |
1481 | gp_usedp = true; | |
1482 | break; | |
1483 | ||
1484 | case ALPHA_R_LITUSE: | |
1485 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
1486 | does not cause anything to happen, itself. */ | |
1487 | break; | |
1488 | ||
1489 | case ALPHA_R_GPDISP: | |
1490 | /* This marks the ldah of an ldah/lda pair which loads the | |
1491 | gp register with the difference of the gp value and the | |
1492 | current location. The second of the pair is r_symndx | |
1493 | bytes ahead, and is also marked with an ALPHA_R_IGNORE | |
1494 | reloc. */ | |
1495 | { | |
1496 | unsigned long insn1, insn2; | |
1497 | ||
1498 | BFD_ASSERT (ext_rel + 1 < ext_rel_end | |
1499 | && (((ext_rel + 1)->r_bits[0] | |
1500 | & RELOC_BITS0_TYPE_LITTLE) | |
1501 | >> RELOC_BITS0_TYPE_SH_LITTLE) == ALPHA_R_IGNORE | |
1502 | && (bfd_h_get_64 (input_bfd, | |
1503 | (bfd_byte *) (ext_rel + 1)->r_vaddr) | |
1504 | == r_vaddr - input_section->vma + r_symndx)); | |
1505 | ||
1506 | /* Get the two instructions. */ | |
1507 | insn1 = bfd_get_32 (input_bfd, | |
1508 | contents + r_vaddr - input_section->vma); | |
1509 | insn2 = bfd_get_32 (input_bfd, | |
1510 | (contents | |
1511 | + r_vaddr | |
1512 | - input_section->vma | |
1513 | + r_symndx)); | |
1514 | ||
1515 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
1516 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
1517 | ||
1518 | /* Get the existing addend. We must account for the sign | |
1519 | extension done by lda and ldah. */ | |
1520 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
1521 | if (insn1 & 0x8000) | |
1522 | { | |
1523 | /* This is addend -= 0x100000000 without causing an | |
1524 | integer overflow on a 32 bit host. */ | |
1525 | addend -= 0x80000000; | |
1526 | addend -= 0x80000000; | |
1527 | } | |
1528 | if (insn2 & 0x8000) | |
1529 | addend -= 0x10000; | |
1530 | ||
1531 | /* The existing addend includes the difference between the | |
1532 | gp of the input BFD and the address in the input BFD. | |
1533 | We want to change this to the difference between the | |
1534 | final GP and the final address. */ | |
1535 | addend += (gp | |
1536 | - ecoff_data (input_bfd)->gp | |
1537 | + input_section->vma | |
1538 | - (input_section->output_section->vma | |
1539 | + input_section->output_offset)); | |
1540 | ||
1541 | /* Change the instructions, accounting for the sign | |
1542 | extension, and write them out. */ | |
1543 | if (addend & 0x8000) | |
1544 | addend += 0x10000; | |
1545 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
1546 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
1547 | ||
1548 | bfd_put_32 (input_bfd, (bfd_vma) insn1, | |
1549 | contents + r_vaddr - input_section->vma); | |
1550 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
1551 | contents + r_vaddr - input_section->vma + r_symndx); | |
1552 | ||
1553 | gp_usedp = true; | |
1554 | } | |
1555 | break; | |
1556 | ||
1557 | case ALPHA_R_OP_PUSH: | |
1558 | case ALPHA_R_OP_PSUB: | |
1559 | case ALPHA_R_OP_PRSHIFT: | |
1560 | /* Manipulate values on the reloc evaluation stack. The | |
1561 | r_vaddr field is not an address in input_section, it is | |
1562 | the current value (including any addend) of the object | |
1563 | being used. */ | |
1564 | if (! r_extern) | |
1565 | { | |
1566 | asection *s; | |
1567 | ||
1568 | s = symndx_to_section[r_symndx]; | |
1569 | if (s == (asection *) NULL) | |
1570 | abort (); | |
1571 | addend = s->output_section->vma + s->output_offset - s->vma; | |
1572 | } | |
1573 | else | |
1574 | { | |
1575 | struct ecoff_link_hash_entry *h; | |
1576 | ||
1577 | h = sym_hashes[r_symndx]; | |
1578 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1579 | abort (); | |
1580 | ||
1581 | if (! info->relocateable) | |
1582 | { | |
1583 | if (h->root.type == bfd_link_hash_defined) | |
1584 | addend = (h->root.u.def.value | |
1585 | + h->root.u.def.section->output_section->vma | |
1586 | + h->root.u.def.section->output_offset); | |
1587 | else | |
1588 | { | |
1589 | /* Note that we pass the address as 0, since we | |
1590 | do not have a meaningful number for the | |
1591 | location within the section that is being | |
1592 | relocated. */ | |
1593 | if (! ((*info->callbacks->undefined_symbol) | |
1594 | (info, h->root.root.string, input_bfd, | |
1595 | input_section, (bfd_vma) 0))) | |
1596 | return false; | |
1597 | addend = 0; | |
1598 | } | |
1599 | } | |
1600 | else | |
1601 | { | |
1602 | if (h->root.type != bfd_link_hash_defined | |
1603 | && h->indx == -1) | |
1604 | { | |
1605 | /* This symbol is not being written out. Pass | |
1606 | the address as 0, as with undefined_symbol, | |
1607 | above. */ | |
1608 | if (! ((*info->callbacks->unattached_reloc) | |
1609 | (info, h->root.root.string, input_bfd, | |
1610 | input_section, (bfd_vma) 0))) | |
1611 | return false; | |
1612 | } | |
1613 | ||
1614 | addend = alpha_convert_external_reloc (output_bfd, info, | |
1615 | input_bfd, | |
1616 | ext_rel, h); | |
1617 | } | |
1618 | } | |
1619 | ||
1620 | addend += r_vaddr; | |
1621 | ||
1622 | if (info->relocateable) | |
1623 | { | |
1624 | /* Adjust r_vaddr by the addend. */ | |
1625 | bfd_h_put_64 (input_bfd, addend, | |
1626 | (bfd_byte *) ext_rel->r_vaddr); | |
1627 | } | |
1628 | else | |
1629 | { | |
1630 | switch (r_type) | |
1631 | { | |
1632 | case ALPHA_R_OP_PUSH: | |
1633 | if (tos >= RELOC_STACKSIZE) | |
1634 | abort (); | |
1635 | stack[tos++] = addend; | |
1636 | break; | |
1637 | ||
1638 | case ALPHA_R_OP_PSUB: | |
1639 | if (tos == 0) | |
1640 | abort (); | |
1641 | stack[tos - 1] -= addend; | |
1642 | break; | |
1643 | ||
1644 | case ALPHA_R_OP_PRSHIFT: | |
1645 | if (tos == 0) | |
1646 | abort (); | |
1647 | stack[tos - 1] >>= addend; | |
1648 | break; | |
1649 | } | |
1650 | } | |
1651 | ||
1652 | adjust_addrp = false; | |
1653 | break; | |
1654 | ||
1655 | case ALPHA_R_OP_STORE: | |
1656 | /* Store a value from the reloc stack into a bitfield. If | |
1657 | we are generating relocateable output, all we do is | |
1658 | adjust the address of the reloc. */ | |
1659 | if (! info->relocateable) | |
1660 | { | |
1661 | bfd_vma val; | |
1662 | ||
1663 | if (tos == 0) | |
1664 | abort (); | |
1665 | ||
1666 | /* FIXME: I don't know what kind of overflow checking, | |
1667 | if any, should be done here. */ | |
1668 | val = bfd_get_64 (input_bfd, | |
1669 | contents + r_vaddr - input_section->vma); | |
1670 | val &=~ (((1 << r_size) - 1) << r_offset); | |
1671 | val |= (stack[--tos] & ((1 << r_size) - 1)) << r_offset; | |
1672 | bfd_put_64 (input_bfd, val, | |
1673 | contents + r_vaddr - input_section->vma); | |
1674 | } | |
1675 | break; | |
1676 | ||
1677 | case ALPHA_R_GPVALUE: | |
1678 | /* I really don't know if this does the right thing. */ | |
1679 | gp = ecoff_data (input_bfd)->gp + r_symndx; | |
1680 | gp_undefined = false; | |
1681 | break; | |
1682 | } | |
1683 | ||
1684 | if (relocatep) | |
1685 | { | |
1686 | reloc_howto_type *howto; | |
1687 | struct ecoff_link_hash_entry *h = NULL; | |
1688 | asection *s = NULL; | |
1689 | bfd_vma relocation; | |
1690 | bfd_reloc_status_type r; | |
1691 | ||
1692 | /* Perform a relocation. */ | |
1693 | ||
1694 | howto = &alpha_howto_table[r_type]; | |
1695 | ||
1696 | if (r_extern) | |
1697 | { | |
1698 | h = sym_hashes[r_symndx]; | |
1699 | /* If h is NULL, that means that there is a reloc | |
1700 | against an external symbol which we thought was just | |
1701 | a debugging symbol. This should not happen. */ | |
1702 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1703 | abort (); | |
1704 | } | |
1705 | else | |
1706 | { | |
3f048f7f | 1707 | if (r_symndx >= NUM_RELOC_SECTIONS) |
693f8191 KR |
1708 | s = NULL; |
1709 | else | |
1710 | s = symndx_to_section[r_symndx]; | |
1711 | ||
1712 | if (s == (asection *) NULL) | |
1713 | abort (); | |
1714 | } | |
1715 | ||
1716 | if (info->relocateable) | |
1717 | { | |
1718 | /* We are generating relocateable output, and must | |
1719 | convert the existing reloc. */ | |
1720 | if (r_extern) | |
1721 | { | |
1722 | if (h->root.type != bfd_link_hash_defined | |
1723 | && h->indx == -1) | |
1724 | { | |
1725 | /* This symbol is not being written out. */ | |
1726 | if (! ((*info->callbacks->unattached_reloc) | |
1727 | (info, h->root.root.string, input_bfd, | |
1728 | input_section, r_vaddr - input_section->vma))) | |
1729 | return false; | |
1730 | } | |
1731 | ||
1732 | relocation = alpha_convert_external_reloc (output_bfd, | |
1733 | info, | |
1734 | input_bfd, | |
1735 | ext_rel, | |
1736 | h); | |
1737 | } | |
1738 | else | |
1739 | { | |
1740 | /* This is a relocation against a section. Adjust | |
1741 | the value by the amount the section moved. */ | |
1742 | relocation = (s->output_section->vma | |
1743 | + s->output_offset | |
1744 | - s->vma); | |
1745 | } | |
1746 | ||
1747 | /* If this is PC relative, the existing object file | |
1748 | appears to already have the reloc worked out. We | |
1749 | must subtract out the old value and add in the new | |
1750 | one. */ | |
1751 | if (howto->pc_relative) | |
1752 | relocation -= (input_section->output_section->vma | |
1753 | + input_section->output_offset | |
1754 | - input_section->vma); | |
1755 | ||
1756 | /* Put in any addend. */ | |
1757 | relocation += addend; | |
1758 | ||
1759 | /* Adjust the contents. */ | |
1760 | r = _bfd_relocate_contents (howto, input_bfd, relocation, | |
1761 | (contents | |
1762 | + r_vaddr | |
1763 | - input_section->vma)); | |
1764 | } | |
1765 | else | |
1766 | { | |
1767 | /* We are producing a final executable. */ | |
1768 | if (r_extern) | |
1769 | { | |
1770 | /* This is a reloc against a symbol. */ | |
1771 | if (h->root.type == bfd_link_hash_defined) | |
1772 | { | |
1773 | asection *hsec; | |
1774 | ||
1775 | hsec = h->root.u.def.section; | |
1776 | relocation = (h->root.u.def.value | |
1777 | + hsec->output_section->vma | |
1778 | + hsec->output_offset); | |
1779 | } | |
1780 | else | |
1781 | { | |
1782 | if (! ((*info->callbacks->undefined_symbol) | |
1783 | (info, h->root.root.string, input_bfd, | |
1784 | input_section, | |
1785 | r_vaddr - input_section->vma))) | |
1786 | return false; | |
1787 | relocation = 0; | |
1788 | } | |
1789 | } | |
1790 | else | |
1791 | { | |
1792 | /* This is a reloc against a section. */ | |
1793 | relocation = (s->output_section->vma | |
1794 | + s->output_offset | |
1795 | - s->vma); | |
1796 | ||
1797 | /* Adjust a PC relative relocation by removing the | |
1798 | reference to the original source section. */ | |
1799 | if (howto->pc_relative) | |
1800 | relocation += input_section->vma; | |
1801 | } | |
1802 | ||
1803 | r = _bfd_final_link_relocate (howto, | |
1804 | input_bfd, | |
1805 | input_section, | |
1806 | contents, | |
1807 | r_vaddr - input_section->vma, | |
1808 | relocation, | |
1809 | addend); | |
1810 | } | |
1811 | ||
1812 | if (r != bfd_reloc_ok) | |
1813 | { | |
1814 | switch (r) | |
1815 | { | |
1816 | default: | |
1817 | case bfd_reloc_outofrange: | |
1818 | abort (); | |
1819 | case bfd_reloc_overflow: | |
4991ebb9 ILT |
1820 | { |
1821 | const char *name; | |
1822 | ||
1823 | if (r_extern) | |
1824 | name = sym_hashes[r_symndx]->root.root.string; | |
1825 | else | |
1826 | name = bfd_section_name (input_bfd, | |
1827 | symndx_to_section[r_symndx]); | |
1828 | if (! ((*info->callbacks->reloc_overflow) | |
1829 | (info, name, alpha_howto_table[r_type].name, | |
1830 | (bfd_vma) 0, input_bfd, input_section, | |
1831 | r_vaddr - input_section->vma))) | |
1832 | return false; | |
1833 | } | |
693f8191 KR |
1834 | break; |
1835 | } | |
1836 | } | |
1837 | } | |
1838 | ||
1839 | if (info->relocateable && adjust_addrp) | |
1840 | { | |
1841 | /* Change the address of the relocation. */ | |
1842 | bfd_h_put_64 (input_bfd, | |
1843 | (input_section->output_section->vma | |
1844 | + input_section->output_offset | |
1845 | - input_section->vma | |
1846 | + r_vaddr), | |
1847 | (bfd_byte *) ext_rel->r_vaddr); | |
1848 | } | |
1849 | ||
1850 | if (gp_usedp && gp_undefined) | |
1851 | { | |
1852 | if (! ((*info->callbacks->reloc_dangerous) | |
1853 | (info, "GP relative relocation when GP not defined", | |
1854 | input_bfd, input_section, r_vaddr - input_section->vma))) | |
1855 | return false; | |
1856 | /* Only give the error once per link. */ | |
1857 | ecoff_data (output_bfd)->gp = gp = 4; | |
1858 | gp_undefined = false; | |
1859 | } | |
1860 | } | |
1861 | ||
1862 | if (tos != 0) | |
1863 | abort (); | |
1864 | ||
1865 | return true; | |
5f8f6d56 | 1866 | } |
dae31cf5 ILT |
1867 | \f |
1868 | #define ecoff_core_file_p _bfd_dummy_target | |
1869 | #define ecoff_core_file_failing_command _bfd_dummy_core_file_failing_command | |
1870 | #define ecoff_core_file_failing_signal _bfd_dummy_core_file_failing_signal | |
1871 | #define ecoff_core_file_matches_executable_p \ | |
1872 | _bfd_dummy_core_file_matches_executable_p | |
1873 | \f | |
693f8191 KR |
1874 | /* This is the ECOFF backend structure. The backend field of the |
1875 | target vector points to this. */ | |
1876 | ||
1877 | static const struct ecoff_backend_data alpha_ecoff_backend_data = | |
1878 | { | |
1879 | /* COFF backend structure. */ | |
1880 | { | |
fa965415 | 1881 | (void (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR))) bfd_void, /* aux_in */ |
693f8191 KR |
1882 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */ |
1883 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */ | |
fa965415 | 1884 | (unsigned (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR)))bfd_void,/*aux_out*/ |
693f8191 KR |
1885 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */ |
1886 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */ | |
1887 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */ | |
1888 | alpha_ecoff_swap_filehdr_out, alpha_ecoff_swap_aouthdr_out, | |
1889 | alpha_ecoff_swap_scnhdr_out, | |
1890 | FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, true, | |
1891 | alpha_ecoff_swap_filehdr_in, alpha_ecoff_swap_aouthdr_in, | |
1892 | alpha_ecoff_swap_scnhdr_in, alpha_ecoff_bad_format_hook, | |
1893 | ecoff_set_arch_mach_hook, ecoff_mkobject_hook, | |
1894 | ecoff_styp_to_sec_flags, ecoff_make_section_hook, ecoff_set_alignment_hook, | |
1895 | ecoff_slurp_symbol_table, NULL, NULL | |
1896 | }, | |
1897 | /* Supported architecture. */ | |
1898 | bfd_arch_alpha, | |
1899 | /* Initial portion of armap string. */ | |
1900 | "________64", | |
1901 | /* The page boundary used to align sections in a demand-paged | |
1902 | executable file. E.g., 0x1000. */ | |
1903 | 0x2000, | |
1904 | /* True if the .rdata section is part of the text segment, as on the | |
1905 | Alpha. False if .rdata is part of the data segment, as on the | |
1906 | MIPS. */ | |
1907 | true, | |
1908 | /* Bitsize of constructor entries. */ | |
1909 | 64, | |
1910 | /* Reloc to use for constructor entries. */ | |
1911 | &alpha_howto_table[ALPHA_R_REFQUAD], | |
1912 | { | |
1913 | /* Symbol table magic number. */ | |
1914 | magicSym2, | |
1915 | /* Alignment of debugging information. E.g., 4. */ | |
1916 | 8, | |
1917 | /* Sizes of external symbolic information. */ | |
1918 | sizeof (struct hdr_ext), | |
1919 | sizeof (struct dnr_ext), | |
1920 | sizeof (struct pdr_ext), | |
1921 | sizeof (struct sym_ext), | |
1922 | sizeof (struct opt_ext), | |
1923 | sizeof (struct fdr_ext), | |
1924 | sizeof (struct rfd_ext), | |
1925 | sizeof (struct ext_ext), | |
1926 | /* Functions to swap in external symbolic data. */ | |
1927 | ecoff_swap_hdr_in, | |
1928 | ecoff_swap_dnr_in, | |
1929 | ecoff_swap_pdr_in, | |
1930 | ecoff_swap_sym_in, | |
1931 | ecoff_swap_opt_in, | |
1932 | ecoff_swap_fdr_in, | |
1933 | ecoff_swap_rfd_in, | |
1934 | ecoff_swap_ext_in, | |
1935 | /* Functions to swap out external symbolic data. */ | |
1936 | ecoff_swap_hdr_out, | |
1937 | ecoff_swap_dnr_out, | |
1938 | ecoff_swap_pdr_out, | |
1939 | ecoff_swap_sym_out, | |
1940 | ecoff_swap_opt_out, | |
1941 | ecoff_swap_fdr_out, | |
1942 | ecoff_swap_rfd_out, | |
1943 | ecoff_swap_ext_out | |
1944 | }, | |
1945 | /* External reloc size. */ | |
1946 | RELSZ, | |
1947 | /* Reloc swapping functions. */ | |
1948 | alpha_ecoff_swap_reloc_in, | |
1949 | alpha_ecoff_swap_reloc_out, | |
1950 | /* Backend reloc tweaking. */ | |
1951 | alpha_adjust_reloc_in, | |
1952 | alpha_adjust_reloc_out, | |
1953 | /* Relocate section contents while linking. */ | |
1954 | alpha_relocate_section | |
dae31cf5 | 1955 | }; |
5f8f6d56 | 1956 | |
693f8191 KR |
1957 | /* Looking up a reloc type is Alpha specific. */ |
1958 | #define ecoff_bfd_reloc_type_lookup alpha_bfd_reloc_type_lookup | |
1959 | ||
1960 | /* So is getting relocated section contents. */ | |
1961 | #define ecoff_bfd_get_relocated_section_contents \ | |
1962 | alpha_ecoff_get_relocated_section_contents | |
1963 | ||
dae31cf5 | 1964 | bfd_target ecoffalpha_little_vec = |
5f8f6d56 | 1965 | { |
dae31cf5 ILT |
1966 | "ecoff-littlealpha", /* name */ |
1967 | bfd_target_ecoff_flavour, | |
1968 | false, /* data byte order is little */ | |
1969 | false, /* header byte order is little */ | |
5f8f6d56 | 1970 | |
dae31cf5 ILT |
1971 | (HAS_RELOC | EXEC_P | /* object flags */ |
1972 | HAS_LINENO | HAS_DEBUG | | |
693f8191 | 1973 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
5f8f6d56 SC |
1974 | |
1975 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* sect | |
1976 | flags */ | |
1977 | 0, /* leading underscore */ | |
dae31cf5 | 1978 | ' ', /* ar_pad_char */ |
5f8f6d56 | 1979 | 15, /* ar_max_namelen */ |
dae31cf5 | 1980 | 4, /* minimum alignment power */ |
693f8191 KR |
1981 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
1982 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1983 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
1984 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
1985 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1986 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
5f8f6d56 | 1987 | |
3f048f7f | 1988 | {_bfd_dummy_target, alpha_ecoff_object_p, /* bfd_check_format */ |
5f8f6d56 | 1989 | ecoff_archive_p, _bfd_dummy_target}, |
693f8191 | 1990 | {bfd_false, ecoff_mkobject, /* bfd_set_format */ |
dae31cf5 | 1991 | _bfd_generic_mkarchive, bfd_false}, |
5f8f6d56 SC |
1992 | {bfd_false, ecoff_write_object_contents, /* bfd_write_contents */ |
1993 | _bfd_write_archive_contents, bfd_false}, | |
1994 | JUMP_TABLE (ecoff), | |
693f8191 | 1995 | (PTR) &alpha_ecoff_backend_data |
5f8f6d56 | 1996 | }; |