Commit | Line | Data |
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252b5132 | 1 | /* BFD back-end for ALPHA Extended-Coff files. |
72adc230 | 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
9553c638 | 3 | 2003, 2004, 2005 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 | |
3e110533 | 21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
252b5132 RH |
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 | ||
b34976b6 AM |
38 | static const bfd_target *alpha_ecoff_object_p |
39 | PARAMS ((bfd *)); | |
40 | static bfd_boolean alpha_ecoff_bad_format_hook | |
41 | PARAMS ((bfd *abfd, PTR filehdr)); | |
42 | static PTR alpha_ecoff_mkobject_hook | |
43 | PARAMS ((bfd *, PTR filehdr, PTR aouthdr)); | |
44 | static void alpha_ecoff_swap_reloc_in | |
45 | PARAMS ((bfd *, PTR, struct internal_reloc *)); | |
46 | static void alpha_ecoff_swap_reloc_out | |
47 | PARAMS ((bfd *, const struct internal_reloc *, PTR)); | |
48 | static void alpha_adjust_reloc_in | |
49 | PARAMS ((bfd *, const struct internal_reloc *, arelent *)); | |
50 | static void alpha_adjust_reloc_out | |
51 | PARAMS ((bfd *, const arelent *, struct internal_reloc *)); | |
252b5132 | 52 | static reloc_howto_type *alpha_bfd_reloc_type_lookup |
b34976b6 | 53 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
252b5132 RH |
54 | static bfd_byte *alpha_ecoff_get_relocated_section_contents |
55 | PARAMS ((bfd *abfd, struct bfd_link_info *, struct bfd_link_order *, | |
1049f94e | 56 | bfd_byte *data, bfd_boolean relocatable, asymbol **symbols)); |
252b5132 RH |
57 | static bfd_vma alpha_convert_external_reloc |
58 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, struct external_reloc *, | |
59 | struct ecoff_link_hash_entry *)); | |
b34976b6 AM |
60 | static bfd_boolean alpha_relocate_section |
61 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, PTR)); | |
62 | static bfd_boolean alpha_adjust_headers | |
252b5132 | 63 | PARAMS ((bfd *, struct internal_filehdr *, struct internal_aouthdr *)); |
b34976b6 AM |
64 | static PTR alpha_ecoff_read_ar_hdr |
65 | PARAMS ((bfd *)); | |
66 | static bfd *alpha_ecoff_get_elt_at_filepos | |
67 | PARAMS ((bfd *, file_ptr)); | |
68 | static bfd *alpha_ecoff_openr_next_archived_file | |
69 | PARAMS ((bfd *, bfd *)); | |
70 | static bfd *alpha_ecoff_get_elt_at_index | |
71 | PARAMS ((bfd *, symindex)); | |
252b5132 RH |
72 | \f |
73 | /* ECOFF has COFF sections, but the debugging information is stored in | |
74 | a completely different format. ECOFF targets use some of the | |
75 | swapping routines from coffswap.h, and some of the generic COFF | |
76 | routines in coffgen.c, but, unlike the real COFF targets, do not | |
77 | use coffcode.h itself. | |
78 | ||
79 | Get the generic COFF swapping routines, except for the reloc, | |
80 | symbol, and lineno ones. Give them ecoff names. Define some | |
81 | accessor macros for the large sizes used for Alpha ECOFF. */ | |
82 | ||
dc810e39 AM |
83 | #define GET_FILEHDR_SYMPTR H_GET_64 |
84 | #define PUT_FILEHDR_SYMPTR H_PUT_64 | |
85 | #define GET_AOUTHDR_TSIZE H_GET_64 | |
86 | #define PUT_AOUTHDR_TSIZE H_PUT_64 | |
87 | #define GET_AOUTHDR_DSIZE H_GET_64 | |
88 | #define PUT_AOUTHDR_DSIZE H_PUT_64 | |
89 | #define GET_AOUTHDR_BSIZE H_GET_64 | |
90 | #define PUT_AOUTHDR_BSIZE H_PUT_64 | |
91 | #define GET_AOUTHDR_ENTRY H_GET_64 | |
92 | #define PUT_AOUTHDR_ENTRY H_PUT_64 | |
93 | #define GET_AOUTHDR_TEXT_START H_GET_64 | |
94 | #define PUT_AOUTHDR_TEXT_START H_PUT_64 | |
95 | #define GET_AOUTHDR_DATA_START H_GET_64 | |
96 | #define PUT_AOUTHDR_DATA_START H_PUT_64 | |
97 | #define GET_SCNHDR_PADDR H_GET_64 | |
98 | #define PUT_SCNHDR_PADDR H_PUT_64 | |
99 | #define GET_SCNHDR_VADDR H_GET_64 | |
100 | #define PUT_SCNHDR_VADDR H_PUT_64 | |
101 | #define GET_SCNHDR_SIZE H_GET_64 | |
102 | #define PUT_SCNHDR_SIZE H_PUT_64 | |
103 | #define GET_SCNHDR_SCNPTR H_GET_64 | |
104 | #define PUT_SCNHDR_SCNPTR H_PUT_64 | |
105 | #define GET_SCNHDR_RELPTR H_GET_64 | |
106 | #define PUT_SCNHDR_RELPTR H_PUT_64 | |
107 | #define GET_SCNHDR_LNNOPTR H_GET_64 | |
108 | #define PUT_SCNHDR_LNNOPTR H_PUT_64 | |
252b5132 RH |
109 | |
110 | #define ALPHAECOFF | |
111 | ||
112 | #define NO_COFF_RELOCS | |
113 | #define NO_COFF_SYMBOLS | |
114 | #define NO_COFF_LINENOS | |
115 | #define coff_swap_filehdr_in alpha_ecoff_swap_filehdr_in | |
116 | #define coff_swap_filehdr_out alpha_ecoff_swap_filehdr_out | |
117 | #define coff_swap_aouthdr_in alpha_ecoff_swap_aouthdr_in | |
118 | #define coff_swap_aouthdr_out alpha_ecoff_swap_aouthdr_out | |
119 | #define coff_swap_scnhdr_in alpha_ecoff_swap_scnhdr_in | |
120 | #define coff_swap_scnhdr_out alpha_ecoff_swap_scnhdr_out | |
121 | #include "coffswap.h" | |
122 | ||
123 | /* Get the ECOFF swapping routines. */ | |
124 | #define ECOFF_64 | |
125 | #include "ecoffswap.h" | |
126 | \f | |
127 | /* How to process the various reloc types. */ | |
128 | ||
b34976b6 AM |
129 | static bfd_reloc_status_type reloc_nil |
130 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
252b5132 RH |
131 | |
132 | static bfd_reloc_status_type | |
133 | reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message) | |
b2747490 AJ |
134 | bfd *abfd ATTRIBUTE_UNUSED; |
135 | arelent *reloc ATTRIBUTE_UNUSED; | |
136 | asymbol *sym ATTRIBUTE_UNUSED; | |
137 | PTR data ATTRIBUTE_UNUSED; | |
138 | asection *sec ATTRIBUTE_UNUSED; | |
139 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
140 | char **error_message ATTRIBUTE_UNUSED; | |
252b5132 RH |
141 | { |
142 | return bfd_reloc_ok; | |
143 | } | |
144 | ||
145 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
146 | from smaller values. Start with zero, widen, *then* decrement. */ | |
147 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
148 | ||
149 | static reloc_howto_type alpha_howto_table[] = | |
150 | { | |
151 | /* Reloc type 0 is ignored by itself. However, it appears after a | |
152 | GPDISP reloc to identify the location where the low order 16 bits | |
153 | of the gp register are loaded. */ | |
154 | HOWTO (ALPHA_R_IGNORE, /* type */ | |
155 | 0, /* rightshift */ | |
156 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
157 | 8, /* bitsize */ | |
b34976b6 | 158 | TRUE, /* pc_relative */ |
252b5132 RH |
159 | 0, /* bitpos */ |
160 | complain_overflow_dont, /* complain_on_overflow */ | |
161 | reloc_nil, /* special_function */ | |
162 | "IGNORE", /* name */ | |
b34976b6 | 163 | TRUE, /* partial_inplace */ |
252b5132 RH |
164 | 0, /* src_mask */ |
165 | 0, /* dst_mask */ | |
b34976b6 | 166 | TRUE), /* pcrel_offset */ |
252b5132 RH |
167 | |
168 | /* A 32 bit reference to a symbol. */ | |
169 | HOWTO (ALPHA_R_REFLONG, /* type */ | |
170 | 0, /* rightshift */ | |
171 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
172 | 32, /* bitsize */ | |
b34976b6 | 173 | FALSE, /* pc_relative */ |
252b5132 RH |
174 | 0, /* bitpos */ |
175 | complain_overflow_bitfield, /* complain_on_overflow */ | |
176 | 0, /* special_function */ | |
177 | "REFLONG", /* name */ | |
b34976b6 | 178 | TRUE, /* partial_inplace */ |
252b5132 RH |
179 | 0xffffffff, /* src_mask */ |
180 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 181 | FALSE), /* pcrel_offset */ |
252b5132 RH |
182 | |
183 | /* A 64 bit reference to a symbol. */ | |
184 | HOWTO (ALPHA_R_REFQUAD, /* type */ | |
185 | 0, /* rightshift */ | |
186 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
187 | 64, /* bitsize */ | |
b34976b6 | 188 | FALSE, /* pc_relative */ |
252b5132 RH |
189 | 0, /* bitpos */ |
190 | complain_overflow_bitfield, /* complain_on_overflow */ | |
191 | 0, /* special_function */ | |
192 | "REFQUAD", /* name */ | |
b34976b6 | 193 | TRUE, /* partial_inplace */ |
252b5132 RH |
194 | MINUS_ONE, /* src_mask */ |
195 | MINUS_ONE, /* dst_mask */ | |
b34976b6 | 196 | FALSE), /* pcrel_offset */ |
252b5132 RH |
197 | |
198 | /* A 32 bit GP relative offset. This is just like REFLONG except | |
199 | that when the value is used the value of the gp register will be | |
200 | added in. */ | |
201 | HOWTO (ALPHA_R_GPREL32, /* type */ | |
202 | 0, /* rightshift */ | |
203 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
204 | 32, /* bitsize */ | |
b34976b6 | 205 | FALSE, /* pc_relative */ |
252b5132 RH |
206 | 0, /* bitpos */ |
207 | complain_overflow_bitfield, /* complain_on_overflow */ | |
208 | 0, /* special_function */ | |
209 | "GPREL32", /* name */ | |
b34976b6 | 210 | TRUE, /* partial_inplace */ |
252b5132 RH |
211 | 0xffffffff, /* src_mask */ |
212 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 213 | FALSE), /* pcrel_offset */ |
252b5132 RH |
214 | |
215 | /* Used for an instruction that refers to memory off the GP | |
216 | register. The offset is 16 bits of the 32 bit instruction. This | |
217 | reloc always seems to be against the .lita section. */ | |
218 | HOWTO (ALPHA_R_LITERAL, /* type */ | |
219 | 0, /* rightshift */ | |
220 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
221 | 16, /* bitsize */ | |
b34976b6 | 222 | FALSE, /* pc_relative */ |
252b5132 RH |
223 | 0, /* bitpos */ |
224 | complain_overflow_signed, /* complain_on_overflow */ | |
225 | 0, /* special_function */ | |
226 | "LITERAL", /* name */ | |
b34976b6 | 227 | TRUE, /* partial_inplace */ |
252b5132 RH |
228 | 0xffff, /* src_mask */ |
229 | 0xffff, /* dst_mask */ | |
b34976b6 | 230 | FALSE), /* pcrel_offset */ |
252b5132 RH |
231 | |
232 | /* This reloc only appears immediately following a LITERAL reloc. | |
233 | It identifies a use of the literal. It seems that the linker can | |
234 | use this to eliminate a portion of the .lita section. The symbol | |
235 | index is special: 1 means the literal address is in the base | |
236 | register of a memory format instruction; 2 means the literal | |
237 | address is in the byte offset register of a byte-manipulation | |
238 | instruction; 3 means the literal address is in the target | |
239 | register of a jsr instruction. This does not actually do any | |
240 | relocation. */ | |
241 | HOWTO (ALPHA_R_LITUSE, /* type */ | |
242 | 0, /* rightshift */ | |
243 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
244 | 32, /* bitsize */ | |
b34976b6 | 245 | FALSE, /* pc_relative */ |
252b5132 RH |
246 | 0, /* bitpos */ |
247 | complain_overflow_dont, /* complain_on_overflow */ | |
248 | reloc_nil, /* special_function */ | |
249 | "LITUSE", /* name */ | |
b34976b6 | 250 | FALSE, /* partial_inplace */ |
252b5132 RH |
251 | 0, /* src_mask */ |
252 | 0, /* dst_mask */ | |
b34976b6 | 253 | FALSE), /* pcrel_offset */ |
252b5132 RH |
254 | |
255 | /* Load the gp register. This is always used for a ldah instruction | |
256 | which loads the upper 16 bits of the gp register. The next reloc | |
257 | will be an IGNORE reloc which identifies the location of the lda | |
258 | instruction which loads the lower 16 bits. The symbol index of | |
259 | the GPDISP instruction appears to actually be the number of bytes | |
260 | between the ldah and lda instructions. This gives two different | |
261 | ways to determine where the lda instruction is; I don't know why | |
262 | both are used. The value to use for the relocation is the | |
263 | difference between the GP value and the current location; the | |
264 | load will always be done against a register holding the current | |
265 | address. */ | |
266 | HOWTO (ALPHA_R_GPDISP, /* type */ | |
267 | 16, /* rightshift */ | |
268 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
269 | 16, /* bitsize */ | |
b34976b6 | 270 | TRUE, /* pc_relative */ |
252b5132 RH |
271 | 0, /* bitpos */ |
272 | complain_overflow_dont, /* complain_on_overflow */ | |
273 | reloc_nil, /* special_function */ | |
274 | "GPDISP", /* name */ | |
b34976b6 | 275 | TRUE, /* partial_inplace */ |
252b5132 RH |
276 | 0xffff, /* src_mask */ |
277 | 0xffff, /* dst_mask */ | |
b34976b6 | 278 | TRUE), /* pcrel_offset */ |
252b5132 RH |
279 | |
280 | /* A 21 bit branch. The native assembler generates these for | |
281 | branches within the text segment, and also fills in the PC | |
282 | relative offset in the instruction. */ | |
283 | HOWTO (ALPHA_R_BRADDR, /* type */ | |
284 | 2, /* rightshift */ | |
285 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
286 | 21, /* bitsize */ | |
b34976b6 | 287 | TRUE, /* pc_relative */ |
252b5132 RH |
288 | 0, /* bitpos */ |
289 | complain_overflow_signed, /* complain_on_overflow */ | |
290 | 0, /* special_function */ | |
291 | "BRADDR", /* name */ | |
b34976b6 | 292 | TRUE, /* partial_inplace */ |
252b5132 RH |
293 | 0x1fffff, /* src_mask */ |
294 | 0x1fffff, /* dst_mask */ | |
b34976b6 | 295 | FALSE), /* pcrel_offset */ |
252b5132 RH |
296 | |
297 | /* A hint for a jump to a register. */ | |
298 | HOWTO (ALPHA_R_HINT, /* type */ | |
299 | 2, /* rightshift */ | |
300 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
301 | 14, /* bitsize */ | |
b34976b6 | 302 | TRUE, /* pc_relative */ |
252b5132 RH |
303 | 0, /* bitpos */ |
304 | complain_overflow_dont, /* complain_on_overflow */ | |
305 | 0, /* special_function */ | |
306 | "HINT", /* name */ | |
b34976b6 | 307 | TRUE, /* partial_inplace */ |
252b5132 RH |
308 | 0x3fff, /* src_mask */ |
309 | 0x3fff, /* dst_mask */ | |
b34976b6 | 310 | FALSE), /* pcrel_offset */ |
252b5132 RH |
311 | |
312 | /* 16 bit PC relative offset. */ | |
313 | HOWTO (ALPHA_R_SREL16, /* type */ | |
314 | 0, /* rightshift */ | |
315 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
316 | 16, /* bitsize */ | |
b34976b6 | 317 | TRUE, /* pc_relative */ |
252b5132 RH |
318 | 0, /* bitpos */ |
319 | complain_overflow_signed, /* complain_on_overflow */ | |
320 | 0, /* special_function */ | |
321 | "SREL16", /* name */ | |
b34976b6 | 322 | TRUE, /* partial_inplace */ |
252b5132 RH |
323 | 0xffff, /* src_mask */ |
324 | 0xffff, /* dst_mask */ | |
b34976b6 | 325 | FALSE), /* pcrel_offset */ |
252b5132 RH |
326 | |
327 | /* 32 bit PC relative offset. */ | |
328 | HOWTO (ALPHA_R_SREL32, /* type */ | |
329 | 0, /* rightshift */ | |
330 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
331 | 32, /* bitsize */ | |
b34976b6 | 332 | TRUE, /* pc_relative */ |
252b5132 RH |
333 | 0, /* bitpos */ |
334 | complain_overflow_signed, /* complain_on_overflow */ | |
335 | 0, /* special_function */ | |
336 | "SREL32", /* name */ | |
b34976b6 | 337 | TRUE, /* partial_inplace */ |
252b5132 RH |
338 | 0xffffffff, /* src_mask */ |
339 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 340 | FALSE), /* pcrel_offset */ |
252b5132 RH |
341 | |
342 | /* A 64 bit PC relative offset. */ | |
343 | HOWTO (ALPHA_R_SREL64, /* type */ | |
344 | 0, /* rightshift */ | |
345 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
346 | 64, /* bitsize */ | |
b34976b6 | 347 | TRUE, /* pc_relative */ |
252b5132 RH |
348 | 0, /* bitpos */ |
349 | complain_overflow_signed, /* complain_on_overflow */ | |
350 | 0, /* special_function */ | |
351 | "SREL64", /* name */ | |
b34976b6 | 352 | TRUE, /* partial_inplace */ |
252b5132 RH |
353 | MINUS_ONE, /* src_mask */ |
354 | MINUS_ONE, /* dst_mask */ | |
b34976b6 | 355 | FALSE), /* pcrel_offset */ |
252b5132 RH |
356 | |
357 | /* Push a value on the reloc evaluation stack. */ | |
358 | HOWTO (ALPHA_R_OP_PUSH, /* type */ | |
359 | 0, /* rightshift */ | |
360 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
361 | 0, /* bitsize */ | |
b34976b6 | 362 | FALSE, /* pc_relative */ |
252b5132 RH |
363 | 0, /* bitpos */ |
364 | complain_overflow_dont, /* complain_on_overflow */ | |
365 | 0, /* special_function */ | |
366 | "OP_PUSH", /* name */ | |
b34976b6 | 367 | FALSE, /* partial_inplace */ |
252b5132 RH |
368 | 0, /* src_mask */ |
369 | 0, /* dst_mask */ | |
b34976b6 | 370 | FALSE), /* pcrel_offset */ |
252b5132 RH |
371 | |
372 | /* Store the value from the stack at the given address. Store it in | |
373 | a bitfield of size r_size starting at bit position r_offset. */ | |
374 | HOWTO (ALPHA_R_OP_STORE, /* type */ | |
375 | 0, /* rightshift */ | |
376 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
377 | 64, /* bitsize */ | |
b34976b6 | 378 | FALSE, /* pc_relative */ |
252b5132 RH |
379 | 0, /* bitpos */ |
380 | complain_overflow_dont, /* complain_on_overflow */ | |
381 | 0, /* special_function */ | |
382 | "OP_STORE", /* name */ | |
b34976b6 | 383 | FALSE, /* partial_inplace */ |
252b5132 RH |
384 | 0, /* src_mask */ |
385 | MINUS_ONE, /* dst_mask */ | |
b34976b6 | 386 | FALSE), /* pcrel_offset */ |
252b5132 RH |
387 | |
388 | /* Subtract the reloc address from the value on the top of the | |
389 | relocation stack. */ | |
390 | HOWTO (ALPHA_R_OP_PSUB, /* type */ | |
391 | 0, /* rightshift */ | |
392 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
393 | 0, /* bitsize */ | |
b34976b6 | 394 | FALSE, /* pc_relative */ |
252b5132 RH |
395 | 0, /* bitpos */ |
396 | complain_overflow_dont, /* complain_on_overflow */ | |
397 | 0, /* special_function */ | |
398 | "OP_PSUB", /* name */ | |
b34976b6 | 399 | FALSE, /* partial_inplace */ |
252b5132 RH |
400 | 0, /* src_mask */ |
401 | 0, /* dst_mask */ | |
b34976b6 | 402 | FALSE), /* pcrel_offset */ |
252b5132 RH |
403 | |
404 | /* Shift the value on the top of the relocation stack right by the | |
405 | given value. */ | |
406 | HOWTO (ALPHA_R_OP_PRSHIFT, /* type */ | |
407 | 0, /* rightshift */ | |
408 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
409 | 0, /* bitsize */ | |
b34976b6 | 410 | FALSE, /* pc_relative */ |
252b5132 RH |
411 | 0, /* bitpos */ |
412 | complain_overflow_dont, /* complain_on_overflow */ | |
413 | 0, /* special_function */ | |
414 | "OP_PRSHIFT", /* name */ | |
b34976b6 | 415 | FALSE, /* partial_inplace */ |
252b5132 RH |
416 | 0, /* src_mask */ |
417 | 0, /* dst_mask */ | |
b34976b6 | 418 | FALSE), /* pcrel_offset */ |
252b5132 RH |
419 | |
420 | /* Adjust the GP value for a new range in the object file. */ | |
421 | HOWTO (ALPHA_R_GPVALUE, /* type */ | |
422 | 0, /* rightshift */ | |
423 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
424 | 0, /* bitsize */ | |
b34976b6 | 425 | FALSE, /* pc_relative */ |
252b5132 RH |
426 | 0, /* bitpos */ |
427 | complain_overflow_dont, /* complain_on_overflow */ | |
428 | 0, /* special_function */ | |
429 | "GPVALUE", /* name */ | |
b34976b6 | 430 | FALSE, /* partial_inplace */ |
252b5132 RH |
431 | 0, /* src_mask */ |
432 | 0, /* dst_mask */ | |
b34976b6 | 433 | FALSE) /* pcrel_offset */ |
252b5132 RH |
434 | }; |
435 | \f | |
436 | /* Recognize an Alpha ECOFF file. */ | |
437 | ||
438 | static const bfd_target * | |
439 | alpha_ecoff_object_p (abfd) | |
440 | bfd *abfd; | |
441 | { | |
442 | static const bfd_target *ret; | |
443 | ||
444 | ret = coff_object_p (abfd); | |
445 | ||
446 | if (ret != NULL) | |
447 | { | |
448 | asection *sec; | |
449 | ||
450 | /* Alpha ECOFF has a .pdata section. The lnnoptr field of the | |
451 | .pdata section is the number of entries it contains. Each | |
452 | entry takes up 8 bytes. The number of entries is required | |
453 | since the section is aligned to a 16 byte boundary. When we | |
454 | link .pdata sections together, we do not want to include the | |
455 | alignment bytes. We handle this on input by faking the size | |
456 | of the .pdata section to remove the unwanted alignment bytes. | |
457 | On output we will set the lnnoptr field and force the | |
458 | alignment. */ | |
459 | sec = bfd_get_section_by_name (abfd, _PDATA); | |
460 | if (sec != (asection *) NULL) | |
461 | { | |
462 | bfd_size_type size; | |
463 | ||
464 | size = sec->line_filepos * 8; | |
eea6121a AM |
465 | BFD_ASSERT (size == sec->size |
466 | || size + 8 == sec->size); | |
252b5132 RH |
467 | if (! bfd_set_section_size (abfd, sec, size)) |
468 | return NULL; | |
469 | } | |
470 | } | |
471 | ||
472 | return ret; | |
473 | } | |
474 | ||
475 | /* See whether the magic number matches. */ | |
476 | ||
b34976b6 | 477 | static bfd_boolean |
252b5132 | 478 | alpha_ecoff_bad_format_hook (abfd, filehdr) |
b2747490 | 479 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
480 | PTR filehdr; |
481 | { | |
482 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
483 | ||
15ac1d4f NC |
484 | if (! ALPHA_ECOFF_BADMAG (*internal_f)) |
485 | return TRUE; | |
252b5132 | 486 | |
15ac1d4f NC |
487 | if (ALPHA_ECOFF_COMPRESSEDMAG (*internal_f)) |
488 | (*_bfd_error_handler) | |
489 | (_("%B: Cannot handle compressed Alpha binaries.\n" | |
490 | " Use compiler flags, or objZ, to generate uncompressed binaries."), | |
491 | abfd); | |
492 | ||
493 | return FALSE; | |
252b5132 RH |
494 | } |
495 | ||
496 | /* This is a hook called by coff_real_object_p to create any backend | |
497 | specific information. */ | |
498 | ||
499 | static PTR | |
500 | alpha_ecoff_mkobject_hook (abfd, filehdr, aouthdr) | |
501 | bfd *abfd; | |
502 | PTR filehdr; | |
503 | PTR aouthdr; | |
504 | { | |
505 | PTR ecoff; | |
506 | ||
507 | ecoff = _bfd_ecoff_mkobject_hook (abfd, filehdr, aouthdr); | |
508 | ||
509 | if (ecoff != NULL) | |
510 | { | |
511 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
512 | ||
513 | /* Set additional BFD flags according to the object type from the | |
514 | machine specific file header flags. */ | |
515 | switch (internal_f->f_flags & F_ALPHA_OBJECT_TYPE_MASK) | |
516 | { | |
517 | case F_ALPHA_SHARABLE: | |
518 | abfd->flags |= DYNAMIC; | |
519 | break; | |
520 | case F_ALPHA_CALL_SHARED: | |
521 | /* Always executable if using shared libraries as the run time | |
522 | loader might resolve undefined references. */ | |
523 | abfd->flags |= (DYNAMIC | EXEC_P); | |
524 | break; | |
525 | } | |
526 | } | |
527 | return ecoff; | |
528 | } | |
529 | \f | |
530 | /* Reloc handling. */ | |
531 | ||
532 | /* Swap a reloc in. */ | |
533 | ||
534 | static void | |
535 | alpha_ecoff_swap_reloc_in (abfd, ext_ptr, intern) | |
536 | bfd *abfd; | |
537 | PTR ext_ptr; | |
538 | struct internal_reloc *intern; | |
539 | { | |
540 | const RELOC *ext = (RELOC *) ext_ptr; | |
541 | ||
dc810e39 AM |
542 | intern->r_vaddr = H_GET_64 (abfd, ext->r_vaddr); |
543 | intern->r_symndx = H_GET_32 (abfd, ext->r_symndx); | |
252b5132 RH |
544 | |
545 | BFD_ASSERT (bfd_header_little_endian (abfd)); | |
546 | ||
547 | intern->r_type = ((ext->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
548 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
549 | intern->r_extern = (ext->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
550 | intern->r_offset = ((ext->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
551 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
552 | /* Ignored the reserved bits. */ | |
553 | intern->r_size = ((ext->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
554 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
555 | ||
556 | if (intern->r_type == ALPHA_R_LITUSE | |
557 | || intern->r_type == ALPHA_R_GPDISP) | |
558 | { | |
559 | /* Handle the LITUSE and GPDISP relocs specially. Its symndx | |
560 | value is not actually a symbol index, but is instead a | |
561 | special code. We put the code in the r_size field, and | |
562 | clobber the symndx. */ | |
563 | if (intern->r_size != 0) | |
564 | abort (); | |
565 | intern->r_size = intern->r_symndx; | |
566 | intern->r_symndx = RELOC_SECTION_NONE; | |
567 | } | |
568 | else if (intern->r_type == ALPHA_R_IGNORE) | |
569 | { | |
570 | /* The IGNORE reloc generally follows a GPDISP reloc, and is | |
571 | against the .lita section. The section is irrelevant. */ | |
572 | if (! intern->r_extern && | |
573 | intern->r_symndx == RELOC_SECTION_ABS) | |
574 | abort (); | |
575 | if (! intern->r_extern && intern->r_symndx == RELOC_SECTION_LITA) | |
576 | intern->r_symndx = RELOC_SECTION_ABS; | |
577 | } | |
578 | } | |
579 | ||
580 | /* Swap a reloc out. */ | |
581 | ||
582 | static void | |
583 | alpha_ecoff_swap_reloc_out (abfd, intern, dst) | |
584 | bfd *abfd; | |
585 | const struct internal_reloc *intern; | |
586 | PTR dst; | |
587 | { | |
588 | RELOC *ext = (RELOC *) dst; | |
589 | long symndx; | |
590 | unsigned char size; | |
591 | ||
592 | /* Undo the hackery done in swap_reloc_in. */ | |
593 | if (intern->r_type == ALPHA_R_LITUSE | |
594 | || intern->r_type == ALPHA_R_GPDISP) | |
595 | { | |
596 | symndx = intern->r_size; | |
597 | size = 0; | |
598 | } | |
599 | else if (intern->r_type == ALPHA_R_IGNORE | |
600 | && ! intern->r_extern | |
601 | && intern->r_symndx == RELOC_SECTION_ABS) | |
602 | { | |
603 | symndx = RELOC_SECTION_LITA; | |
604 | size = intern->r_size; | |
605 | } | |
606 | else | |
607 | { | |
608 | symndx = intern->r_symndx; | |
609 | size = intern->r_size; | |
610 | } | |
611 | ||
15ac1d4f | 612 | /* XXX FIXME: The maximum symndx value used to be 14 but this |
bfaaa3c2 | 613 | fails with object files produced by DEC's C++ compiler. |
15ac1d4f | 614 | Where does the value 14 (or 15) come from anyway ? */ |
252b5132 | 615 | BFD_ASSERT (intern->r_extern |
15ac1d4f | 616 | || (intern->r_symndx >= 0 && intern->r_symndx <= 15)); |
252b5132 | 617 | |
dc810e39 AM |
618 | H_PUT_64 (abfd, intern->r_vaddr, ext->r_vaddr); |
619 | H_PUT_32 (abfd, symndx, ext->r_symndx); | |
252b5132 RH |
620 | |
621 | BFD_ASSERT (bfd_header_little_endian (abfd)); | |
622 | ||
623 | ext->r_bits[0] = ((intern->r_type << RELOC_BITS0_TYPE_SH_LITTLE) | |
624 | & RELOC_BITS0_TYPE_LITTLE); | |
625 | ext->r_bits[1] = ((intern->r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0) | |
626 | | ((intern->r_offset << RELOC_BITS1_OFFSET_SH_LITTLE) | |
627 | & RELOC_BITS1_OFFSET_LITTLE)); | |
628 | ext->r_bits[2] = 0; | |
629 | ext->r_bits[3] = ((size << RELOC_BITS3_SIZE_SH_LITTLE) | |
630 | & RELOC_BITS3_SIZE_LITTLE); | |
631 | } | |
632 | ||
633 | /* Finish canonicalizing a reloc. Part of this is generic to all | |
634 | ECOFF targets, and that part is in ecoff.c. The rest is done in | |
635 | this backend routine. It must fill in the howto field. */ | |
636 | ||
637 | static void | |
638 | alpha_adjust_reloc_in (abfd, intern, rptr) | |
639 | bfd *abfd; | |
640 | const struct internal_reloc *intern; | |
641 | arelent *rptr; | |
642 | { | |
643 | if (intern->r_type > ALPHA_R_GPVALUE) | |
0adc9281 NC |
644 | { |
645 | (*_bfd_error_handler) | |
646 | (_("%B: unknown/unsupported relocation type %d"), | |
647 | abfd, intern->r_type); | |
648 | bfd_set_error (bfd_error_bad_value); | |
649 | rptr->addend = 0; | |
650 | rptr->howto = NULL; | |
651 | return; | |
652 | } | |
252b5132 RH |
653 | |
654 | switch (intern->r_type) | |
655 | { | |
656 | case ALPHA_R_BRADDR: | |
657 | case ALPHA_R_SREL16: | |
658 | case ALPHA_R_SREL32: | |
659 | case ALPHA_R_SREL64: | |
660 | /* This relocs appear to be fully resolved when they are against | |
661 | internal symbols. Against external symbols, BRADDR at least | |
662 | appears to be resolved against the next instruction. */ | |
663 | if (! intern->r_extern) | |
664 | rptr->addend = 0; | |
665 | else | |
666 | rptr->addend = - (intern->r_vaddr + 4); | |
667 | break; | |
668 | ||
669 | case ALPHA_R_GPREL32: | |
670 | case ALPHA_R_LITERAL: | |
671 | /* Copy the gp value for this object file into the addend, to | |
672 | ensure that we are not confused by the linker. */ | |
673 | if (! intern->r_extern) | |
674 | rptr->addend += ecoff_data (abfd)->gp; | |
675 | break; | |
676 | ||
677 | case ALPHA_R_LITUSE: | |
678 | case ALPHA_R_GPDISP: | |
679 | /* The LITUSE and GPDISP relocs do not use a symbol, or an | |
680 | addend, but they do use a special code. Put this code in the | |
681 | addend field. */ | |
682 | rptr->addend = intern->r_size; | |
683 | break; | |
684 | ||
685 | case ALPHA_R_OP_STORE: | |
686 | /* The STORE reloc needs the size and offset fields. We store | |
687 | them in the addend. */ | |
ca724bf2 | 688 | BFD_ASSERT (intern->r_offset <= 256); |
252b5132 RH |
689 | rptr->addend = (intern->r_offset << 8) + intern->r_size; |
690 | break; | |
691 | ||
692 | case ALPHA_R_OP_PUSH: | |
693 | case ALPHA_R_OP_PSUB: | |
694 | case ALPHA_R_OP_PRSHIFT: | |
695 | /* The PUSH, PSUB and PRSHIFT relocs do not actually use an | |
696 | address. I believe that the address supplied is really an | |
697 | addend. */ | |
698 | rptr->addend = intern->r_vaddr; | |
699 | break; | |
700 | ||
701 | case ALPHA_R_GPVALUE: | |
702 | /* Set the addend field to the new GP value. */ | |
703 | rptr->addend = intern->r_symndx + ecoff_data (abfd)->gp; | |
704 | break; | |
705 | ||
706 | case ALPHA_R_IGNORE: | |
707 | /* If the type is ALPHA_R_IGNORE, make sure this is a reference | |
708 | to the absolute section so that the reloc is ignored. For | |
709 | some reason the address of this reloc type is not adjusted by | |
710 | the section vma. We record the gp value for this object file | |
711 | here, for convenience when doing the GPDISP relocation. */ | |
712 | rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
713 | rptr->address = intern->r_vaddr; | |
714 | rptr->addend = ecoff_data (abfd)->gp; | |
715 | break; | |
716 | ||
717 | default: | |
718 | break; | |
719 | } | |
720 | ||
721 | rptr->howto = &alpha_howto_table[intern->r_type]; | |
722 | } | |
723 | ||
724 | /* When writing out a reloc we need to pull some values back out of | |
725 | the addend field into the reloc. This is roughly the reverse of | |
726 | alpha_adjust_reloc_in, except that there are several changes we do | |
727 | not need to undo. */ | |
728 | ||
729 | static void | |
730 | alpha_adjust_reloc_out (abfd, rel, intern) | |
b2747490 | 731 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
732 | const arelent *rel; |
733 | struct internal_reloc *intern; | |
734 | { | |
735 | switch (intern->r_type) | |
736 | { | |
737 | case ALPHA_R_LITUSE: | |
738 | case ALPHA_R_GPDISP: | |
739 | intern->r_size = rel->addend; | |
740 | break; | |
741 | ||
742 | case ALPHA_R_OP_STORE: | |
743 | intern->r_size = rel->addend & 0xff; | |
744 | intern->r_offset = (rel->addend >> 8) & 0xff; | |
745 | break; | |
746 | ||
747 | case ALPHA_R_OP_PUSH: | |
748 | case ALPHA_R_OP_PSUB: | |
749 | case ALPHA_R_OP_PRSHIFT: | |
750 | intern->r_vaddr = rel->addend; | |
751 | break; | |
752 | ||
753 | case ALPHA_R_IGNORE: | |
754 | intern->r_vaddr = rel->address; | |
755 | break; | |
756 | ||
757 | default: | |
758 | break; | |
759 | } | |
760 | } | |
761 | ||
762 | /* The size of the stack for the relocation evaluator. */ | |
763 | #define RELOC_STACKSIZE (10) | |
764 | ||
765 | /* Alpha ECOFF relocs have a built in expression evaluator as well as | |
766 | other interdependencies. Rather than use a bunch of special | |
767 | functions and global variables, we use a single routine to do all | |
768 | the relocation for a section. I haven't yet worked out how the | |
769 | assembler is going to handle this. */ | |
770 | ||
771 | static bfd_byte * | |
772 | alpha_ecoff_get_relocated_section_contents (abfd, link_info, link_order, | |
1049f94e | 773 | data, relocatable, symbols) |
252b5132 RH |
774 | bfd *abfd; |
775 | struct bfd_link_info *link_info; | |
776 | struct bfd_link_order *link_order; | |
777 | bfd_byte *data; | |
1049f94e | 778 | bfd_boolean relocatable; |
252b5132 RH |
779 | asymbol **symbols; |
780 | { | |
781 | bfd *input_bfd = link_order->u.indirect.section->owner; | |
782 | asection *input_section = link_order->u.indirect.section; | |
783 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); | |
784 | arelent **reloc_vector = NULL; | |
785 | long reloc_count; | |
1049f94e | 786 | bfd *output_bfd = relocatable ? abfd : (bfd *) NULL; |
252b5132 | 787 | bfd_vma gp; |
eea6121a | 788 | bfd_size_type sz; |
b34976b6 | 789 | bfd_boolean gp_undefined; |
252b5132 RH |
790 | bfd_vma stack[RELOC_STACKSIZE]; |
791 | int tos = 0; | |
792 | ||
793 | if (reloc_size < 0) | |
794 | goto error_return; | |
dc810e39 | 795 | reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size); |
252b5132 RH |
796 | if (reloc_vector == NULL && reloc_size != 0) |
797 | goto error_return; | |
798 | ||
eea6121a AM |
799 | sz = input_section->rawsize ? input_section->rawsize : input_section->size; |
800 | if (! bfd_get_section_contents (input_bfd, input_section, data, 0, sz)) | |
252b5132 RH |
801 | goto error_return; |
802 | ||
252b5132 RH |
803 | reloc_count = bfd_canonicalize_reloc (input_bfd, input_section, |
804 | reloc_vector, symbols); | |
805 | if (reloc_count < 0) | |
806 | goto error_return; | |
807 | if (reloc_count == 0) | |
808 | goto successful_return; | |
809 | ||
810 | /* Get the GP value for the output BFD. */ | |
b34976b6 | 811 | gp_undefined = FALSE; |
252b5132 RH |
812 | gp = _bfd_get_gp_value (abfd); |
813 | if (gp == 0) | |
814 | { | |
1049f94e | 815 | if (relocatable) |
252b5132 RH |
816 | { |
817 | asection *sec; | |
818 | bfd_vma lo; | |
819 | ||
820 | /* Make up a value. */ | |
821 | lo = (bfd_vma) -1; | |
822 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
823 | { | |
824 | if (sec->vma < lo | |
825 | && (strcmp (sec->name, ".sbss") == 0 | |
826 | || strcmp (sec->name, ".sdata") == 0 | |
827 | || strcmp (sec->name, ".lit4") == 0 | |
828 | || strcmp (sec->name, ".lit8") == 0 | |
829 | || strcmp (sec->name, ".lita") == 0)) | |
830 | lo = sec->vma; | |
831 | } | |
832 | gp = lo + 0x8000; | |
833 | _bfd_set_gp_value (abfd, gp); | |
834 | } | |
835 | else | |
836 | { | |
837 | struct bfd_link_hash_entry *h; | |
838 | ||
b34976b6 AM |
839 | h = bfd_link_hash_lookup (link_info->hash, "_gp", FALSE, FALSE, |
840 | TRUE); | |
252b5132 RH |
841 | if (h == (struct bfd_link_hash_entry *) NULL |
842 | || h->type != bfd_link_hash_defined) | |
b34976b6 | 843 | gp_undefined = TRUE; |
252b5132 RH |
844 | else |
845 | { | |
846 | gp = (h->u.def.value | |
847 | + h->u.def.section->output_section->vma | |
848 | + h->u.def.section->output_offset); | |
849 | _bfd_set_gp_value (abfd, gp); | |
850 | } | |
851 | } | |
852 | } | |
853 | ||
854 | for (; *reloc_vector != (arelent *) NULL; reloc_vector++) | |
855 | { | |
856 | arelent *rel; | |
857 | bfd_reloc_status_type r; | |
858 | char *err; | |
859 | ||
860 | rel = *reloc_vector; | |
861 | r = bfd_reloc_ok; | |
862 | switch (rel->howto->type) | |
863 | { | |
864 | case ALPHA_R_IGNORE: | |
865 | rel->address += input_section->output_offset; | |
866 | break; | |
867 | ||
868 | case ALPHA_R_REFLONG: | |
869 | case ALPHA_R_REFQUAD: | |
870 | case ALPHA_R_BRADDR: | |
871 | case ALPHA_R_HINT: | |
872 | case ALPHA_R_SREL16: | |
873 | case ALPHA_R_SREL32: | |
874 | case ALPHA_R_SREL64: | |
1049f94e | 875 | if (relocatable |
252b5132 RH |
876 | && ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) |
877 | { | |
878 | rel->address += input_section->output_offset; | |
879 | break; | |
880 | } | |
881 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
882 | output_bfd, &err); | |
883 | break; | |
884 | ||
885 | case ALPHA_R_GPREL32: | |
886 | /* This relocation is used in a switch table. It is a 32 | |
887 | bit offset from the current GP value. We must adjust it | |
888 | by the different between the original GP value and the | |
889 | current GP value. The original GP value is stored in the | |
890 | addend. We adjust the addend and let | |
891 | bfd_perform_relocation finish the job. */ | |
892 | rel->addend -= gp; | |
893 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
894 | output_bfd, &err); | |
895 | if (r == bfd_reloc_ok && gp_undefined) | |
896 | { | |
897 | r = bfd_reloc_dangerous; | |
898 | err = (char *) _("GP relative relocation used when GP not defined"); | |
899 | } | |
900 | break; | |
901 | ||
902 | case ALPHA_R_LITERAL: | |
903 | /* This is a reference to a literal value, generally | |
904 | (always?) in the .lita section. This is a 16 bit GP | |
905 | relative relocation. Sometimes the subsequent reloc is a | |
906 | LITUSE reloc, which indicates how this reloc is used. | |
907 | This sometimes permits rewriting the two instructions | |
908 | referred to by the LITERAL and the LITUSE into different | |
909 | instructions which do not refer to .lita. This can save | |
910 | a memory reference, and permits removing a value from | |
911 | .lita thus saving GP relative space. | |
912 | ||
913 | We do not these optimizations. To do them we would need | |
914 | to arrange to link the .lita section first, so that by | |
915 | the time we got here we would know the final values to | |
916 | use. This would not be particularly difficult, but it is | |
917 | not currently implemented. */ | |
918 | ||
919 | { | |
920 | unsigned long insn; | |
921 | ||
922 | /* I believe that the LITERAL reloc will only apply to a | |
923 | ldq or ldl instruction, so check my assumption. */ | |
924 | insn = bfd_get_32 (input_bfd, data + rel->address); | |
925 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 | |
926 | || ((insn >> 26) & 0x3f) == 0x28); | |
927 | ||
928 | rel->addend -= gp; | |
929 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
930 | output_bfd, &err); | |
931 | if (r == bfd_reloc_ok && gp_undefined) | |
932 | { | |
933 | r = bfd_reloc_dangerous; | |
934 | err = | |
935 | (char *) _("GP relative relocation used when GP not defined"); | |
936 | } | |
937 | } | |
938 | break; | |
939 | ||
940 | case ALPHA_R_LITUSE: | |
941 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
942 | does not cause anything to happen, itself. */ | |
943 | rel->address += input_section->output_offset; | |
944 | break; | |
346ceb11 | 945 | |
252b5132 RH |
946 | case ALPHA_R_GPDISP: |
947 | /* This marks the ldah of an ldah/lda pair which loads the | |
948 | gp register with the difference of the gp value and the | |
949 | current location. The second of the pair is r_size bytes | |
950 | ahead; it used to be marked with an ALPHA_R_IGNORE reloc, | |
951 | but that no longer happens in OSF/1 3.2. */ | |
952 | { | |
953 | unsigned long insn1, insn2; | |
954 | bfd_vma addend; | |
955 | ||
956 | /* Get the two instructions. */ | |
957 | insn1 = bfd_get_32 (input_bfd, data + rel->address); | |
958 | insn2 = bfd_get_32 (input_bfd, data + rel->address + rel->addend); | |
959 | ||
960 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
961 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
962 | ||
963 | /* Get the existing addend. We must account for the sign | |
964 | extension done by lda and ldah. */ | |
965 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
966 | if (insn1 & 0x8000) | |
967 | { | |
968 | addend -= 0x80000000; | |
969 | addend -= 0x80000000; | |
970 | } | |
971 | if (insn2 & 0x8000) | |
972 | addend -= 0x10000; | |
973 | ||
974 | /* The existing addend includes the different between the | |
975 | gp of the input BFD and the address in the input BFD. | |
976 | Subtract this out. */ | |
977 | addend -= (ecoff_data (input_bfd)->gp | |
978 | - (input_section->vma + rel->address)); | |
979 | ||
980 | /* Now add in the final gp value, and subtract out the | |
981 | final address. */ | |
982 | addend += (gp | |
983 | - (input_section->output_section->vma | |
984 | + input_section->output_offset | |
985 | + rel->address)); | |
986 | ||
987 | /* Change the instructions, accounting for the sign | |
988 | extension, and write them out. */ | |
989 | if (addend & 0x8000) | |
990 | addend += 0x10000; | |
991 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
992 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
993 | ||
994 | bfd_put_32 (input_bfd, (bfd_vma) insn1, data + rel->address); | |
995 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
996 | data + rel->address + rel->addend); | |
997 | ||
998 | rel->address += input_section->output_offset; | |
999 | } | |
1000 | break; | |
346ceb11 | 1001 | |
252b5132 RH |
1002 | case ALPHA_R_OP_PUSH: |
1003 | /* Push a value on the reloc evaluation stack. */ | |
1004 | { | |
1005 | asymbol *symbol; | |
1006 | bfd_vma relocation; | |
1007 | ||
1049f94e | 1008 | if (relocatable) |
252b5132 RH |
1009 | { |
1010 | rel->address += input_section->output_offset; | |
1011 | break; | |
1012 | } | |
1013 | ||
1014 | /* Figure out the relocation of this symbol. */ | |
1015 | symbol = *rel->sym_ptr_ptr; | |
1016 | ||
1017 | if (bfd_is_und_section (symbol->section)) | |
1018 | r = bfd_reloc_undefined; | |
1019 | ||
1020 | if (bfd_is_com_section (symbol->section)) | |
1021 | relocation = 0; | |
1022 | else | |
1023 | relocation = symbol->value; | |
1024 | relocation += symbol->section->output_section->vma; | |
1025 | relocation += symbol->section->output_offset; | |
1026 | relocation += rel->addend; | |
1027 | ||
1028 | if (tos >= RELOC_STACKSIZE) | |
1029 | abort (); | |
1030 | ||
1031 | stack[tos++] = relocation; | |
1032 | } | |
1033 | break; | |
1034 | ||
1035 | case ALPHA_R_OP_STORE: | |
1036 | /* Store a value from the reloc stack into a bitfield. */ | |
1037 | { | |
1038 | bfd_vma val; | |
1039 | int offset, size; | |
1040 | ||
1049f94e | 1041 | if (relocatable) |
252b5132 RH |
1042 | { |
1043 | rel->address += input_section->output_offset; | |
1044 | break; | |
1045 | } | |
1046 | ||
1047 | if (tos == 0) | |
1048 | abort (); | |
1049 | ||
1050 | /* The offset and size for this reloc are encoded into the | |
1051 | addend field by alpha_adjust_reloc_in. */ | |
1052 | offset = (rel->addend >> 8) & 0xff; | |
1053 | size = rel->addend & 0xff; | |
1054 | ||
1055 | val = bfd_get_64 (abfd, data + rel->address); | |
1056 | val &=~ (((1 << size) - 1) << offset); | |
1057 | val |= (stack[--tos] & ((1 << size) - 1)) << offset; | |
1058 | bfd_put_64 (abfd, val, data + rel->address); | |
1059 | } | |
1060 | break; | |
1061 | ||
1062 | case ALPHA_R_OP_PSUB: | |
1063 | /* Subtract a value from the top of the stack. */ | |
1064 | { | |
1065 | asymbol *symbol; | |
1066 | bfd_vma relocation; | |
1067 | ||
1049f94e | 1068 | if (relocatable) |
252b5132 RH |
1069 | { |
1070 | rel->address += input_section->output_offset; | |
1071 | break; | |
1072 | } | |
1073 | ||
1074 | /* Figure out the relocation of this symbol. */ | |
1075 | symbol = *rel->sym_ptr_ptr; | |
1076 | ||
1077 | if (bfd_is_und_section (symbol->section)) | |
1078 | r = bfd_reloc_undefined; | |
1079 | ||
1080 | if (bfd_is_com_section (symbol->section)) | |
1081 | relocation = 0; | |
1082 | else | |
1083 | relocation = symbol->value; | |
1084 | relocation += symbol->section->output_section->vma; | |
1085 | relocation += symbol->section->output_offset; | |
1086 | relocation += rel->addend; | |
1087 | ||
1088 | if (tos == 0) | |
1089 | abort (); | |
1090 | ||
1091 | stack[tos - 1] -= relocation; | |
1092 | } | |
1093 | break; | |
1094 | ||
1095 | case ALPHA_R_OP_PRSHIFT: | |
1096 | /* Shift the value on the top of the stack. */ | |
1097 | { | |
1098 | asymbol *symbol; | |
1099 | bfd_vma relocation; | |
1100 | ||
1049f94e | 1101 | if (relocatable) |
252b5132 RH |
1102 | { |
1103 | rel->address += input_section->output_offset; | |
1104 | break; | |
1105 | } | |
1106 | ||
1107 | /* Figure out the relocation of this symbol. */ | |
1108 | symbol = *rel->sym_ptr_ptr; | |
1109 | ||
1110 | if (bfd_is_und_section (symbol->section)) | |
1111 | r = bfd_reloc_undefined; | |
1112 | ||
1113 | if (bfd_is_com_section (symbol->section)) | |
1114 | relocation = 0; | |
1115 | else | |
1116 | relocation = symbol->value; | |
1117 | relocation += symbol->section->output_section->vma; | |
1118 | relocation += symbol->section->output_offset; | |
1119 | relocation += rel->addend; | |
1120 | ||
1121 | if (tos == 0) | |
1122 | abort (); | |
1123 | ||
1124 | stack[tos - 1] >>= relocation; | |
1125 | } | |
1126 | break; | |
346ceb11 | 1127 | |
252b5132 RH |
1128 | case ALPHA_R_GPVALUE: |
1129 | /* I really don't know if this does the right thing. */ | |
1130 | gp = rel->addend; | |
b34976b6 | 1131 | gp_undefined = FALSE; |
252b5132 RH |
1132 | break; |
1133 | ||
1134 | default: | |
1135 | abort (); | |
1136 | } | |
1137 | ||
1049f94e | 1138 | if (relocatable) |
252b5132 RH |
1139 | { |
1140 | asection *os = input_section->output_section; | |
1141 | ||
1142 | /* A partial link, so keep the relocs. */ | |
1143 | os->orelocation[os->reloc_count] = rel; | |
1144 | os->reloc_count++; | |
1145 | } | |
1146 | ||
346ceb11 | 1147 | if (r != bfd_reloc_ok) |
252b5132 RH |
1148 | { |
1149 | switch (r) | |
1150 | { | |
1151 | case bfd_reloc_undefined: | |
1152 | if (! ((*link_info->callbacks->undefined_symbol) | |
1153 | (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr), | |
b34976b6 | 1154 | input_bfd, input_section, rel->address, TRUE))) |
252b5132 RH |
1155 | goto error_return; |
1156 | break; | |
346ceb11 | 1157 | case bfd_reloc_dangerous: |
252b5132 RH |
1158 | if (! ((*link_info->callbacks->reloc_dangerous) |
1159 | (link_info, err, input_bfd, input_section, | |
1160 | rel->address))) | |
1161 | goto error_return; | |
1162 | break; | |
1163 | case bfd_reloc_overflow: | |
1164 | if (! ((*link_info->callbacks->reloc_overflow) | |
dfeffb9f L |
1165 | (link_info, NULL, |
1166 | bfd_asymbol_name (*rel->sym_ptr_ptr), | |
252b5132 RH |
1167 | rel->howto->name, rel->addend, input_bfd, |
1168 | input_section, rel->address))) | |
1169 | goto error_return; | |
1170 | break; | |
1171 | case bfd_reloc_outofrange: | |
1172 | default: | |
1173 | abort (); | |
1174 | break; | |
1175 | } | |
1176 | } | |
1177 | } | |
1178 | ||
1179 | if (tos != 0) | |
1180 | abort (); | |
1181 | ||
1182 | successful_return: | |
1183 | if (reloc_vector != NULL) | |
1184 | free (reloc_vector); | |
1185 | return data; | |
1186 | ||
1187 | error_return: | |
1188 | if (reloc_vector != NULL) | |
1189 | free (reloc_vector); | |
1190 | return NULL; | |
1191 | } | |
1192 | ||
1193 | /* Get the howto structure for a generic reloc type. */ | |
1194 | ||
1195 | static reloc_howto_type * | |
1196 | alpha_bfd_reloc_type_lookup (abfd, code) | |
b2747490 | 1197 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1198 | bfd_reloc_code_real_type code; |
1199 | { | |
1200 | int alpha_type; | |
1201 | ||
1202 | switch (code) | |
1203 | { | |
1204 | case BFD_RELOC_32: | |
1205 | alpha_type = ALPHA_R_REFLONG; | |
1206 | break; | |
1207 | case BFD_RELOC_64: | |
1208 | case BFD_RELOC_CTOR: | |
1209 | alpha_type = ALPHA_R_REFQUAD; | |
1210 | break; | |
1211 | case BFD_RELOC_GPREL32: | |
1212 | alpha_type = ALPHA_R_GPREL32; | |
1213 | break; | |
1214 | case BFD_RELOC_ALPHA_LITERAL: | |
1215 | alpha_type = ALPHA_R_LITERAL; | |
1216 | break; | |
1217 | case BFD_RELOC_ALPHA_LITUSE: | |
1218 | alpha_type = ALPHA_R_LITUSE; | |
1219 | break; | |
1220 | case BFD_RELOC_ALPHA_GPDISP_HI16: | |
1221 | alpha_type = ALPHA_R_GPDISP; | |
1222 | break; | |
1223 | case BFD_RELOC_ALPHA_GPDISP_LO16: | |
1224 | alpha_type = ALPHA_R_IGNORE; | |
1225 | break; | |
1226 | case BFD_RELOC_23_PCREL_S2: | |
1227 | alpha_type = ALPHA_R_BRADDR; | |
1228 | break; | |
1229 | case BFD_RELOC_ALPHA_HINT: | |
1230 | alpha_type = ALPHA_R_HINT; | |
1231 | break; | |
1232 | case BFD_RELOC_16_PCREL: | |
1233 | alpha_type = ALPHA_R_SREL16; | |
1234 | break; | |
1235 | case BFD_RELOC_32_PCREL: | |
1236 | alpha_type = ALPHA_R_SREL32; | |
1237 | break; | |
1238 | case BFD_RELOC_64_PCREL: | |
1239 | alpha_type = ALPHA_R_SREL64; | |
1240 | break; | |
252b5132 RH |
1241 | default: |
1242 | return (reloc_howto_type *) NULL; | |
1243 | } | |
1244 | ||
1245 | return &alpha_howto_table[alpha_type]; | |
1246 | } | |
1247 | \f | |
1248 | /* A helper routine for alpha_relocate_section which converts an | |
1049f94e | 1249 | external reloc when generating relocatable output. Returns the |
252b5132 RH |
1250 | relocation amount. */ |
1251 | ||
1252 | static bfd_vma | |
1253 | alpha_convert_external_reloc (output_bfd, info, input_bfd, ext_rel, h) | |
b2747490 | 1254 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1255 | struct bfd_link_info *info; |
1256 | bfd *input_bfd; | |
1257 | struct external_reloc *ext_rel; | |
1258 | struct ecoff_link_hash_entry *h; | |
1259 | { | |
1260 | unsigned long r_symndx; | |
1261 | bfd_vma relocation; | |
1262 | ||
1049f94e | 1263 | BFD_ASSERT (info->relocatable); |
252b5132 RH |
1264 | |
1265 | if (h->root.type == bfd_link_hash_defined | |
1266 | || h->root.type == bfd_link_hash_defweak) | |
1267 | { | |
1268 | asection *hsec; | |
1269 | const char *name; | |
1270 | ||
1271 | /* This symbol is defined in the output. Convert the reloc from | |
1272 | being against the symbol to being against the section. */ | |
1273 | ||
1274 | /* Clear the r_extern bit. */ | |
1275 | ext_rel->r_bits[1] &=~ RELOC_BITS1_EXTERN_LITTLE; | |
1276 | ||
1277 | /* Compute a new r_symndx value. */ | |
1278 | hsec = h->root.u.def.section; | |
1279 | name = bfd_get_section_name (output_bfd, hsec->output_section); | |
1280 | ||
dc810e39 | 1281 | r_symndx = (unsigned long) -1; |
252b5132 RH |
1282 | switch (name[1]) |
1283 | { | |
1284 | case 'A': | |
1285 | if (strcmp (name, "*ABS*") == 0) | |
1286 | r_symndx = RELOC_SECTION_ABS; | |
1287 | break; | |
1288 | case 'b': | |
1289 | if (strcmp (name, ".bss") == 0) | |
1290 | r_symndx = RELOC_SECTION_BSS; | |
1291 | break; | |
1292 | case 'd': | |
1293 | if (strcmp (name, ".data") == 0) | |
1294 | r_symndx = RELOC_SECTION_DATA; | |
1295 | break; | |
1296 | case 'f': | |
1297 | if (strcmp (name, ".fini") == 0) | |
1298 | r_symndx = RELOC_SECTION_FINI; | |
1299 | break; | |
1300 | case 'i': | |
1301 | if (strcmp (name, ".init") == 0) | |
1302 | r_symndx = RELOC_SECTION_INIT; | |
1303 | break; | |
1304 | case 'l': | |
1305 | if (strcmp (name, ".lita") == 0) | |
1306 | r_symndx = RELOC_SECTION_LITA; | |
1307 | else if (strcmp (name, ".lit8") == 0) | |
1308 | r_symndx = RELOC_SECTION_LIT8; | |
1309 | else if (strcmp (name, ".lit4") == 0) | |
1310 | r_symndx = RELOC_SECTION_LIT4; | |
1311 | break; | |
1312 | case 'p': | |
1313 | if (strcmp (name, ".pdata") == 0) | |
1314 | r_symndx = RELOC_SECTION_PDATA; | |
1315 | break; | |
1316 | case 'r': | |
1317 | if (strcmp (name, ".rdata") == 0) | |
1318 | r_symndx = RELOC_SECTION_RDATA; | |
1319 | else if (strcmp (name, ".rconst") == 0) | |
1320 | r_symndx = RELOC_SECTION_RCONST; | |
1321 | break; | |
1322 | case 's': | |
1323 | if (strcmp (name, ".sdata") == 0) | |
1324 | r_symndx = RELOC_SECTION_SDATA; | |
1325 | else if (strcmp (name, ".sbss") == 0) | |
1326 | r_symndx = RELOC_SECTION_SBSS; | |
1327 | break; | |
1328 | case 't': | |
1329 | if (strcmp (name, ".text") == 0) | |
1330 | r_symndx = RELOC_SECTION_TEXT; | |
1331 | break; | |
1332 | case 'x': | |
1333 | if (strcmp (name, ".xdata") == 0) | |
1334 | r_symndx = RELOC_SECTION_XDATA; | |
1335 | break; | |
1336 | } | |
346ceb11 | 1337 | |
cea4409c | 1338 | if (r_symndx == (unsigned long) -1) |
252b5132 RH |
1339 | abort (); |
1340 | ||
1341 | /* Add the section VMA and the symbol value. */ | |
1342 | relocation = (h->root.u.def.value | |
1343 | + hsec->output_section->vma | |
1344 | + hsec->output_offset); | |
1345 | } | |
1346 | else | |
1347 | { | |
1348 | /* Change the symndx value to the right one for | |
1349 | the output BFD. */ | |
1350 | r_symndx = h->indx; | |
cea4409c | 1351 | if (r_symndx == (unsigned long) -1) |
252b5132 RH |
1352 | { |
1353 | /* Caller must give an error. */ | |
1354 | r_symndx = 0; | |
1355 | } | |
1356 | relocation = 0; | |
1357 | } | |
1358 | ||
1359 | /* Write out the new r_symndx value. */ | |
dc810e39 | 1360 | H_PUT_32 (input_bfd, r_symndx, ext_rel->r_symndx); |
252b5132 RH |
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 | ||
b34976b6 | 1369 | static bfd_boolean |
252b5132 RH |
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; | |
b34976b6 | 1382 | bfd_boolean gp_undefined; |
252b5132 RH |
1383 | bfd_vma stack[RELOC_STACKSIZE]; |
1384 | int tos = 0; | |
1385 | struct external_reloc *ext_rel; | |
1386 | struct external_reloc *ext_rel_end; | |
dc810e39 | 1387 | bfd_size_type amt; |
252b5132 RH |
1388 | |
1389 | /* We keep a table mapping the symndx found in an internal reloc to | |
1390 | the appropriate section. This is faster than looking up the | |
1391 | section by name each time. */ | |
1392 | symndx_to_section = ecoff_data (input_bfd)->symndx_to_section; | |
1393 | if (symndx_to_section == (asection **) NULL) | |
1394 | { | |
dc810e39 AM |
1395 | amt = NUM_RELOC_SECTIONS * sizeof (asection *); |
1396 | symndx_to_section = (asection **) bfd_alloc (input_bfd, amt); | |
252b5132 | 1397 | if (!symndx_to_section) |
b34976b6 | 1398 | return FALSE; |
252b5132 RH |
1399 | |
1400 | symndx_to_section[RELOC_SECTION_NONE] = NULL; | |
1401 | symndx_to_section[RELOC_SECTION_TEXT] = | |
1402 | bfd_get_section_by_name (input_bfd, ".text"); | |
1403 | symndx_to_section[RELOC_SECTION_RDATA] = | |
1404 | bfd_get_section_by_name (input_bfd, ".rdata"); | |
1405 | symndx_to_section[RELOC_SECTION_DATA] = | |
1406 | bfd_get_section_by_name (input_bfd, ".data"); | |
1407 | symndx_to_section[RELOC_SECTION_SDATA] = | |
1408 | bfd_get_section_by_name (input_bfd, ".sdata"); | |
1409 | symndx_to_section[RELOC_SECTION_SBSS] = | |
1410 | bfd_get_section_by_name (input_bfd, ".sbss"); | |
1411 | symndx_to_section[RELOC_SECTION_BSS] = | |
1412 | bfd_get_section_by_name (input_bfd, ".bss"); | |
1413 | symndx_to_section[RELOC_SECTION_INIT] = | |
1414 | bfd_get_section_by_name (input_bfd, ".init"); | |
1415 | symndx_to_section[RELOC_SECTION_LIT8] = | |
1416 | bfd_get_section_by_name (input_bfd, ".lit8"); | |
1417 | symndx_to_section[RELOC_SECTION_LIT4] = | |
1418 | bfd_get_section_by_name (input_bfd, ".lit4"); | |
1419 | symndx_to_section[RELOC_SECTION_XDATA] = | |
1420 | bfd_get_section_by_name (input_bfd, ".xdata"); | |
1421 | symndx_to_section[RELOC_SECTION_PDATA] = | |
1422 | bfd_get_section_by_name (input_bfd, ".pdata"); | |
1423 | symndx_to_section[RELOC_SECTION_FINI] = | |
1424 | bfd_get_section_by_name (input_bfd, ".fini"); | |
1425 | symndx_to_section[RELOC_SECTION_LITA] = | |
1426 | bfd_get_section_by_name (input_bfd, ".lita"); | |
1427 | symndx_to_section[RELOC_SECTION_ABS] = bfd_abs_section_ptr; | |
1428 | symndx_to_section[RELOC_SECTION_RCONST] = | |
1429 | bfd_get_section_by_name (input_bfd, ".rconst"); | |
1430 | ||
1431 | ecoff_data (input_bfd)->symndx_to_section = symndx_to_section; | |
1432 | } | |
1433 | ||
1434 | sym_hashes = ecoff_data (input_bfd)->sym_hashes; | |
1435 | ||
1436 | /* On the Alpha, the .lita section must be addressable by the global | |
1437 | pointer. To support large programs, we need to allow multiple | |
1438 | global pointers. This works as long as each input .lita section | |
1439 | is <64KB big. This implies that when producing relocatable | |
346ceb11 | 1440 | output, the .lita section is limited to 64KB. . */ |
252b5132 RH |
1441 | |
1442 | lita_sec = symndx_to_section[RELOC_SECTION_LITA]; | |
1443 | gp = _bfd_get_gp_value (output_bfd); | |
1049f94e | 1444 | if (! info->relocatable && lita_sec != NULL) |
252b5132 RH |
1445 | { |
1446 | struct ecoff_section_tdata *lita_sec_data; | |
1447 | ||
1448 | /* Make sure we have a section data structure to which we can | |
1449 | hang on to the gp value we pick for the section. */ | |
1450 | lita_sec_data = ecoff_section_data (input_bfd, lita_sec); | |
1451 | if (lita_sec_data == NULL) | |
1452 | { | |
dc810e39 | 1453 | amt = sizeof (struct ecoff_section_tdata); |
252b5132 | 1454 | lita_sec_data = ((struct ecoff_section_tdata *) |
dc810e39 | 1455 | bfd_zalloc (input_bfd, amt)); |
e9edc808 | 1456 | lita_sec->used_by_bfd = lita_sec_data; |
252b5132 RH |
1457 | } |
1458 | ||
1459 | if (lita_sec_data->gp != 0) | |
1460 | { | |
1461 | /* If we already assigned a gp to this section, we better | |
1462 | stick with that value. */ | |
1463 | gp = lita_sec_data->gp; | |
1464 | } | |
1465 | else | |
1466 | { | |
1467 | bfd_vma lita_vma; | |
1468 | bfd_size_type lita_size; | |
1469 | ||
1470 | lita_vma = lita_sec->output_offset + lita_sec->output_section->vma; | |
eea6121a | 1471 | lita_size = lita_sec->size; |
252b5132 RH |
1472 | |
1473 | if (gp == 0 | |
1474 | || lita_vma < gp - 0x8000 | |
1475 | || lita_vma + lita_size >= gp + 0x8000) | |
1476 | { | |
1477 | /* Either gp hasn't been set at all or the current gp | |
1478 | cannot address this .lita section. In both cases we | |
1479 | reset the gp to point into the "middle" of the | |
1480 | current input .lita section. */ | |
1481 | if (gp && !ecoff_data (output_bfd)->issued_multiple_gp_warning) | |
1482 | { | |
1483 | (*info->callbacks->warning) (info, | |
1484 | _("using multiple gp values"), | |
1485 | (char *) NULL, output_bfd, | |
1486 | (asection *) NULL, (bfd_vma) 0); | |
b34976b6 | 1487 | ecoff_data (output_bfd)->issued_multiple_gp_warning = TRUE; |
252b5132 RH |
1488 | } |
1489 | if (lita_vma < gp - 0x8000) | |
1490 | gp = lita_vma + lita_size - 0x8000; | |
1491 | else | |
1492 | gp = lita_vma + 0x8000; | |
1493 | ||
1494 | } | |
1495 | ||
1496 | lita_sec_data->gp = gp; | |
1497 | } | |
1498 | ||
1499 | _bfd_set_gp_value (output_bfd, gp); | |
1500 | } | |
1501 | ||
1502 | gp_undefined = (gp == 0); | |
1503 | ||
1504 | BFD_ASSERT (bfd_header_little_endian (output_bfd)); | |
1505 | BFD_ASSERT (bfd_header_little_endian (input_bfd)); | |
1506 | ||
1507 | ext_rel = (struct external_reloc *) external_relocs; | |
1508 | ext_rel_end = ext_rel + input_section->reloc_count; | |
1509 | for (; ext_rel < ext_rel_end; ext_rel++) | |
1510 | { | |
1511 | bfd_vma r_vaddr; | |
1512 | unsigned long r_symndx; | |
1513 | int r_type; | |
1514 | int r_extern; | |
1515 | int r_offset; | |
1516 | int r_size; | |
b34976b6 AM |
1517 | bfd_boolean relocatep; |
1518 | bfd_boolean adjust_addrp; | |
1519 | bfd_boolean gp_usedp; | |
252b5132 RH |
1520 | bfd_vma addend; |
1521 | ||
dc810e39 AM |
1522 | r_vaddr = H_GET_64 (input_bfd, ext_rel->r_vaddr); |
1523 | r_symndx = H_GET_32 (input_bfd, ext_rel->r_symndx); | |
252b5132 RH |
1524 | |
1525 | r_type = ((ext_rel->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
1526 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
1527 | r_extern = (ext_rel->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
1528 | r_offset = ((ext_rel->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
1529 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
1530 | /* Ignored the reserved bits. */ | |
1531 | r_size = ((ext_rel->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
1532 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
1533 | ||
b34976b6 AM |
1534 | relocatep = FALSE; |
1535 | adjust_addrp = TRUE; | |
1536 | gp_usedp = FALSE; | |
252b5132 RH |
1537 | addend = 0; |
1538 | ||
1539 | switch (r_type) | |
1540 | { | |
0adc9281 NC |
1541 | case ALPHA_R_GPRELHIGH: |
1542 | (*_bfd_error_handler) | |
1543 | (_("%B: unsupported relocation: ALPHA_R_GPRELHIGH"), | |
1544 | input_bfd); | |
1545 | bfd_set_error (bfd_error_bad_value); | |
1546 | continue; | |
1547 | ||
1548 | case ALPHA_R_GPRELLOW: | |
1549 | (*_bfd_error_handler) | |
1550 | (_("%B: unsupported relocation: ALPHA_R_GPRELLOW"), | |
1551 | input_bfd); | |
1552 | bfd_set_error (bfd_error_bad_value); | |
1553 | continue; | |
1554 | ||
252b5132 | 1555 | default: |
0adc9281 NC |
1556 | (*_bfd_error_handler) |
1557 | (_("%B: unknown relocation type %d"), | |
1558 | input_bfd, (int) r_type); | |
1559 | bfd_set_error (bfd_error_bad_value); | |
1560 | continue; | |
252b5132 RH |
1561 | |
1562 | case ALPHA_R_IGNORE: | |
1563 | /* This reloc appears after a GPDISP reloc. On earlier | |
1564 | versions of OSF/1, It marked the position of the second | |
1565 | instruction to be altered by the GPDISP reloc, but it is | |
1566 | not otherwise used for anything. For some reason, the | |
1567 | address of the relocation does not appear to include the | |
1568 | section VMA, unlike the other relocation types. */ | |
1049f94e | 1569 | if (info->relocatable) |
dc810e39 AM |
1570 | H_PUT_64 (input_bfd, input_section->output_offset + r_vaddr, |
1571 | ext_rel->r_vaddr); | |
b34976b6 | 1572 | adjust_addrp = FALSE; |
252b5132 RH |
1573 | break; |
1574 | ||
1575 | case ALPHA_R_REFLONG: | |
1576 | case ALPHA_R_REFQUAD: | |
1577 | case ALPHA_R_HINT: | |
b34976b6 | 1578 | relocatep = TRUE; |
252b5132 RH |
1579 | break; |
1580 | ||
1581 | case ALPHA_R_BRADDR: | |
1582 | case ALPHA_R_SREL16: | |
1583 | case ALPHA_R_SREL32: | |
1584 | case ALPHA_R_SREL64: | |
1585 | if (r_extern) | |
1586 | addend += - (r_vaddr + 4); | |
b34976b6 | 1587 | relocatep = TRUE; |
252b5132 RH |
1588 | break; |
1589 | ||
1590 | case ALPHA_R_GPREL32: | |
1591 | /* This relocation is used in a switch table. It is a 32 | |
1592 | bit offset from the current GP value. We must adjust it | |
1593 | by the different between the original GP value and the | |
1594 | current GP value. */ | |
b34976b6 | 1595 | relocatep = TRUE; |
252b5132 | 1596 | addend = ecoff_data (input_bfd)->gp - gp; |
b34976b6 | 1597 | gp_usedp = TRUE; |
252b5132 RH |
1598 | break; |
1599 | ||
1600 | case ALPHA_R_LITERAL: | |
1601 | /* This is a reference to a literal value, generally | |
1602 | (always?) in the .lita section. This is a 16 bit GP | |
1603 | relative relocation. Sometimes the subsequent reloc is a | |
1604 | LITUSE reloc, which indicates how this reloc is used. | |
1605 | This sometimes permits rewriting the two instructions | |
1606 | referred to by the LITERAL and the LITUSE into different | |
1607 | instructions which do not refer to .lita. This can save | |
1608 | a memory reference, and permits removing a value from | |
1609 | .lita thus saving GP relative space. | |
1610 | ||
1611 | We do not these optimizations. To do them we would need | |
1612 | to arrange to link the .lita section first, so that by | |
1613 | the time we got here we would know the final values to | |
1614 | use. This would not be particularly difficult, but it is | |
1615 | not currently implemented. */ | |
1616 | ||
1617 | /* I believe that the LITERAL reloc will only apply to a ldq | |
1618 | or ldl instruction, so check my assumption. */ | |
1619 | { | |
1620 | unsigned long insn; | |
1621 | ||
1622 | insn = bfd_get_32 (input_bfd, | |
1623 | contents + r_vaddr - input_section->vma); | |
1624 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 | |
1625 | || ((insn >> 26) & 0x3f) == 0x28); | |
1626 | } | |
1627 | ||
b34976b6 | 1628 | relocatep = TRUE; |
252b5132 | 1629 | addend = ecoff_data (input_bfd)->gp - gp; |
b34976b6 | 1630 | gp_usedp = TRUE; |
252b5132 RH |
1631 | break; |
1632 | ||
1633 | case ALPHA_R_LITUSE: | |
1634 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
1635 | does not cause anything to happen, itself. */ | |
1636 | break; | |
346ceb11 | 1637 | |
252b5132 RH |
1638 | case ALPHA_R_GPDISP: |
1639 | /* This marks the ldah of an ldah/lda pair which loads the | |
1640 | gp register with the difference of the gp value and the | |
1641 | current location. The second of the pair is r_symndx | |
1642 | bytes ahead. It used to be marked with an ALPHA_R_IGNORE | |
1643 | reloc, but OSF/1 3.2 no longer does that. */ | |
1644 | { | |
1645 | unsigned long insn1, insn2; | |
1646 | ||
1647 | /* Get the two instructions. */ | |
1648 | insn1 = bfd_get_32 (input_bfd, | |
1649 | contents + r_vaddr - input_section->vma); | |
1650 | insn2 = bfd_get_32 (input_bfd, | |
1651 | (contents | |
1652 | + r_vaddr | |
1653 | - input_section->vma | |
1654 | + r_symndx)); | |
1655 | ||
1656 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
1657 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
1658 | ||
1659 | /* Get the existing addend. We must account for the sign | |
1660 | extension done by lda and ldah. */ | |
1661 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
1662 | if (insn1 & 0x8000) | |
1663 | { | |
1664 | /* This is addend -= 0x100000000 without causing an | |
1665 | integer overflow on a 32 bit host. */ | |
1666 | addend -= 0x80000000; | |
1667 | addend -= 0x80000000; | |
1668 | } | |
1669 | if (insn2 & 0x8000) | |
1670 | addend -= 0x10000; | |
1671 | ||
1672 | /* The existing addend includes the difference between the | |
1673 | gp of the input BFD and the address in the input BFD. | |
1674 | We want to change this to the difference between the | |
1675 | final GP and the final address. */ | |
1676 | addend += (gp | |
1677 | - ecoff_data (input_bfd)->gp | |
1678 | + input_section->vma | |
1679 | - (input_section->output_section->vma | |
1680 | + input_section->output_offset)); | |
1681 | ||
1682 | /* Change the instructions, accounting for the sign | |
1683 | extension, and write them out. */ | |
1684 | if (addend & 0x8000) | |
1685 | addend += 0x10000; | |
1686 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
1687 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
1688 | ||
1689 | bfd_put_32 (input_bfd, (bfd_vma) insn1, | |
1690 | contents + r_vaddr - input_section->vma); | |
1691 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
1692 | contents + r_vaddr - input_section->vma + r_symndx); | |
1693 | ||
b34976b6 | 1694 | gp_usedp = TRUE; |
252b5132 RH |
1695 | } |
1696 | break; | |
346ceb11 | 1697 | |
252b5132 RH |
1698 | case ALPHA_R_OP_PUSH: |
1699 | case ALPHA_R_OP_PSUB: | |
1700 | case ALPHA_R_OP_PRSHIFT: | |
1701 | /* Manipulate values on the reloc evaluation stack. The | |
1702 | r_vaddr field is not an address in input_section, it is | |
1703 | the current value (including any addend) of the object | |
1704 | being used. */ | |
1705 | if (! r_extern) | |
1706 | { | |
1707 | asection *s; | |
1708 | ||
1709 | s = symndx_to_section[r_symndx]; | |
1710 | if (s == (asection *) NULL) | |
1711 | abort (); | |
1712 | addend = s->output_section->vma + s->output_offset - s->vma; | |
1713 | } | |
1714 | else | |
1715 | { | |
1716 | struct ecoff_link_hash_entry *h; | |
1717 | ||
1718 | h = sym_hashes[r_symndx]; | |
1719 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1720 | abort (); | |
1721 | ||
1049f94e | 1722 | if (! info->relocatable) |
252b5132 RH |
1723 | { |
1724 | if (h->root.type == bfd_link_hash_defined | |
1725 | || h->root.type == bfd_link_hash_defweak) | |
1726 | addend = (h->root.u.def.value | |
1727 | + h->root.u.def.section->output_section->vma | |
1728 | + h->root.u.def.section->output_offset); | |
1729 | else | |
1730 | { | |
1731 | /* Note that we pass the address as 0, since we | |
1732 | do not have a meaningful number for the | |
1733 | location within the section that is being | |
1734 | relocated. */ | |
1735 | if (! ((*info->callbacks->undefined_symbol) | |
1736 | (info, h->root.root.string, input_bfd, | |
b34976b6 AM |
1737 | input_section, (bfd_vma) 0, TRUE))) |
1738 | return FALSE; | |
252b5132 RH |
1739 | addend = 0; |
1740 | } | |
1741 | } | |
1742 | else | |
1743 | { | |
1744 | if (h->root.type != bfd_link_hash_defined | |
1745 | && h->root.type != bfd_link_hash_defweak | |
1746 | && h->indx == -1) | |
1747 | { | |
1748 | /* This symbol is not being written out. Pass | |
1749 | the address as 0, as with undefined_symbol, | |
1750 | above. */ | |
1751 | if (! ((*info->callbacks->unattached_reloc) | |
1752 | (info, h->root.root.string, input_bfd, | |
1753 | input_section, (bfd_vma) 0))) | |
b34976b6 | 1754 | return FALSE; |
252b5132 RH |
1755 | } |
1756 | ||
1757 | addend = alpha_convert_external_reloc (output_bfd, info, | |
1758 | input_bfd, | |
1759 | ext_rel, h); | |
1760 | } | |
1761 | } | |
1762 | ||
1763 | addend += r_vaddr; | |
1764 | ||
1049f94e | 1765 | if (info->relocatable) |
252b5132 RH |
1766 | { |
1767 | /* Adjust r_vaddr by the addend. */ | |
dc810e39 | 1768 | H_PUT_64 (input_bfd, addend, ext_rel->r_vaddr); |
252b5132 RH |
1769 | } |
1770 | else | |
1771 | { | |
1772 | switch (r_type) | |
1773 | { | |
1774 | case ALPHA_R_OP_PUSH: | |
1775 | if (tos >= RELOC_STACKSIZE) | |
1776 | abort (); | |
1777 | stack[tos++] = addend; | |
1778 | break; | |
1779 | ||
1780 | case ALPHA_R_OP_PSUB: | |
1781 | if (tos == 0) | |
1782 | abort (); | |
1783 | stack[tos - 1] -= addend; | |
1784 | break; | |
1785 | ||
1786 | case ALPHA_R_OP_PRSHIFT: | |
1787 | if (tos == 0) | |
1788 | abort (); | |
1789 | stack[tos - 1] >>= addend; | |
1790 | break; | |
1791 | } | |
1792 | } | |
1793 | ||
b34976b6 | 1794 | adjust_addrp = FALSE; |
252b5132 RH |
1795 | break; |
1796 | ||
1797 | case ALPHA_R_OP_STORE: | |
1798 | /* Store a value from the reloc stack into a bitfield. If | |
1049f94e | 1799 | we are generating relocatable output, all we do is |
252b5132 | 1800 | adjust the address of the reloc. */ |
1049f94e | 1801 | if (! info->relocatable) |
252b5132 RH |
1802 | { |
1803 | bfd_vma mask; | |
1804 | bfd_vma val; | |
1805 | ||
1806 | if (tos == 0) | |
1807 | abort (); | |
1808 | ||
1809 | /* Get the relocation mask. The separate steps and the | |
1810 | casts to bfd_vma are attempts to avoid a bug in the | |
1811 | Alpha OSF 1.3 C compiler. See reloc.c for more | |
1812 | details. */ | |
1813 | mask = 1; | |
1814 | mask <<= (bfd_vma) r_size; | |
1815 | mask -= 1; | |
1816 | ||
1817 | /* FIXME: I don't know what kind of overflow checking, | |
1818 | if any, should be done here. */ | |
1819 | val = bfd_get_64 (input_bfd, | |
1820 | contents + r_vaddr - input_section->vma); | |
1821 | val &=~ mask << (bfd_vma) r_offset; | |
1822 | val |= (stack[--tos] & mask) << (bfd_vma) r_offset; | |
1823 | bfd_put_64 (input_bfd, val, | |
1824 | contents + r_vaddr - input_section->vma); | |
1825 | } | |
1826 | break; | |
1827 | ||
1828 | case ALPHA_R_GPVALUE: | |
1829 | /* I really don't know if this does the right thing. */ | |
1830 | gp = ecoff_data (input_bfd)->gp + r_symndx; | |
b34976b6 | 1831 | gp_undefined = FALSE; |
252b5132 RH |
1832 | break; |
1833 | } | |
1834 | ||
1835 | if (relocatep) | |
1836 | { | |
1837 | reloc_howto_type *howto; | |
1838 | struct ecoff_link_hash_entry *h = NULL; | |
1839 | asection *s = NULL; | |
1840 | bfd_vma relocation; | |
1841 | bfd_reloc_status_type r; | |
1842 | ||
1843 | /* Perform a relocation. */ | |
1844 | ||
1845 | howto = &alpha_howto_table[r_type]; | |
1846 | ||
1847 | if (r_extern) | |
1848 | { | |
1849 | h = sym_hashes[r_symndx]; | |
1850 | /* If h is NULL, that means that there is a reloc | |
1851 | against an external symbol which we thought was just | |
1852 | a debugging symbol. This should not happen. */ | |
1853 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1854 | abort (); | |
1855 | } | |
1856 | else | |
1857 | { | |
1858 | if (r_symndx >= NUM_RELOC_SECTIONS) | |
1859 | s = NULL; | |
1860 | else | |
1861 | s = symndx_to_section[r_symndx]; | |
1862 | ||
1863 | if (s == (asection *) NULL) | |
1864 | abort (); | |
1865 | } | |
1866 | ||
1049f94e | 1867 | if (info->relocatable) |
252b5132 | 1868 | { |
1049f94e | 1869 | /* We are generating relocatable output, and must |
252b5132 RH |
1870 | convert the existing reloc. */ |
1871 | if (r_extern) | |
1872 | { | |
1873 | if (h->root.type != bfd_link_hash_defined | |
1874 | && h->root.type != bfd_link_hash_defweak | |
1875 | && h->indx == -1) | |
1876 | { | |
1877 | /* This symbol is not being written out. */ | |
1878 | if (! ((*info->callbacks->unattached_reloc) | |
1879 | (info, h->root.root.string, input_bfd, | |
1880 | input_section, r_vaddr - input_section->vma))) | |
b34976b6 | 1881 | return FALSE; |
252b5132 RH |
1882 | } |
1883 | ||
1884 | relocation = alpha_convert_external_reloc (output_bfd, | |
1885 | info, | |
1886 | input_bfd, | |
1887 | ext_rel, | |
1888 | h); | |
1889 | } | |
1890 | else | |
1891 | { | |
1892 | /* This is a relocation against a section. Adjust | |
1893 | the value by the amount the section moved. */ | |
1894 | relocation = (s->output_section->vma | |
1895 | + s->output_offset | |
1896 | - s->vma); | |
1897 | } | |
1898 | ||
1899 | /* If this is PC relative, the existing object file | |
1900 | appears to already have the reloc worked out. We | |
1901 | must subtract out the old value and add in the new | |
1902 | one. */ | |
1903 | if (howto->pc_relative) | |
1904 | relocation -= (input_section->output_section->vma | |
1905 | + input_section->output_offset | |
1906 | - input_section->vma); | |
1907 | ||
1908 | /* Put in any addend. */ | |
1909 | relocation += addend; | |
1910 | ||
1911 | /* Adjust the contents. */ | |
1912 | r = _bfd_relocate_contents (howto, input_bfd, relocation, | |
1913 | (contents | |
1914 | + r_vaddr | |
1915 | - input_section->vma)); | |
1916 | } | |
1917 | else | |
1918 | { | |
1919 | /* We are producing a final executable. */ | |
1920 | if (r_extern) | |
1921 | { | |
1922 | /* This is a reloc against a symbol. */ | |
1923 | if (h->root.type == bfd_link_hash_defined | |
1924 | || h->root.type == bfd_link_hash_defweak) | |
1925 | { | |
1926 | asection *hsec; | |
1927 | ||
1928 | hsec = h->root.u.def.section; | |
1929 | relocation = (h->root.u.def.value | |
1930 | + hsec->output_section->vma | |
1931 | + hsec->output_offset); | |
1932 | } | |
1933 | else | |
1934 | { | |
1935 | if (! ((*info->callbacks->undefined_symbol) | |
1936 | (info, h->root.root.string, input_bfd, | |
1937 | input_section, | |
b34976b6 AM |
1938 | r_vaddr - input_section->vma, TRUE))) |
1939 | return FALSE; | |
252b5132 RH |
1940 | relocation = 0; |
1941 | } | |
1942 | } | |
1943 | else | |
1944 | { | |
1945 | /* This is a reloc against a section. */ | |
1946 | relocation = (s->output_section->vma | |
1947 | + s->output_offset | |
1948 | - s->vma); | |
1949 | ||
1950 | /* Adjust a PC relative relocation by removing the | |
1951 | reference to the original source section. */ | |
1952 | if (howto->pc_relative) | |
1953 | relocation += input_section->vma; | |
1954 | } | |
1955 | ||
1956 | r = _bfd_final_link_relocate (howto, | |
1957 | input_bfd, | |
1958 | input_section, | |
1959 | contents, | |
1960 | r_vaddr - input_section->vma, | |
1961 | relocation, | |
1962 | addend); | |
1963 | } | |
1964 | ||
1965 | if (r != bfd_reloc_ok) | |
1966 | { | |
1967 | switch (r) | |
1968 | { | |
1969 | default: | |
1970 | case bfd_reloc_outofrange: | |
1971 | abort (); | |
1972 | case bfd_reloc_overflow: | |
1973 | { | |
1974 | const char *name; | |
1975 | ||
1976 | if (r_extern) | |
1977 | name = sym_hashes[r_symndx]->root.root.string; | |
1978 | else | |
1979 | name = bfd_section_name (input_bfd, | |
1980 | symndx_to_section[r_symndx]); | |
1981 | if (! ((*info->callbacks->reloc_overflow) | |
dfeffb9f L |
1982 | (info, NULL, name, |
1983 | alpha_howto_table[r_type].name, | |
252b5132 RH |
1984 | (bfd_vma) 0, input_bfd, input_section, |
1985 | r_vaddr - input_section->vma))) | |
b34976b6 | 1986 | return FALSE; |
252b5132 RH |
1987 | } |
1988 | break; | |
1989 | } | |
1990 | } | |
1991 | } | |
1992 | ||
1049f94e | 1993 | if (info->relocatable && adjust_addrp) |
252b5132 RH |
1994 | { |
1995 | /* Change the address of the relocation. */ | |
dc810e39 AM |
1996 | H_PUT_64 (input_bfd, |
1997 | (input_section->output_section->vma | |
1998 | + input_section->output_offset | |
1999 | - input_section->vma | |
2000 | + r_vaddr), | |
2001 | ext_rel->r_vaddr); | |
252b5132 RH |
2002 | } |
2003 | ||
2004 | if (gp_usedp && gp_undefined) | |
2005 | { | |
2006 | if (! ((*info->callbacks->reloc_dangerous) | |
cc9ff76a | 2007 | (info, _("GP relative relocation used when GP not defined"), |
252b5132 | 2008 | input_bfd, input_section, r_vaddr - input_section->vma))) |
b34976b6 | 2009 | return FALSE; |
252b5132 RH |
2010 | /* Only give the error once per link. */ |
2011 | gp = 4; | |
2012 | _bfd_set_gp_value (output_bfd, gp); | |
b34976b6 | 2013 | gp_undefined = FALSE; |
252b5132 RH |
2014 | } |
2015 | } | |
2016 | ||
2017 | if (tos != 0) | |
2018 | abort (); | |
2019 | ||
b34976b6 | 2020 | return TRUE; |
252b5132 RH |
2021 | } |
2022 | \f | |
2023 | /* Do final adjustments to the filehdr and the aouthdr. This routine | |
2024 | sets the dynamic bits in the file header. */ | |
2025 | ||
b34976b6 | 2026 | static bfd_boolean |
252b5132 RH |
2027 | alpha_adjust_headers (abfd, fhdr, ahdr) |
2028 | bfd *abfd; | |
2029 | struct internal_filehdr *fhdr; | |
b2747490 | 2030 | struct internal_aouthdr *ahdr ATTRIBUTE_UNUSED; |
252b5132 RH |
2031 | { |
2032 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == (DYNAMIC | EXEC_P)) | |
2033 | fhdr->f_flags |= F_ALPHA_CALL_SHARED; | |
2034 | else if ((abfd->flags & DYNAMIC) != 0) | |
2035 | fhdr->f_flags |= F_ALPHA_SHARABLE; | |
b34976b6 | 2036 | return TRUE; |
252b5132 RH |
2037 | } |
2038 | \f | |
2039 | /* Archive handling. In OSF/1 (or Digital Unix) v3.2, Digital | |
2040 | introduced archive packing, in which the elements in an archive are | |
2041 | optionally compressed using a simple dictionary scheme. We know | |
2042 | how to read such archives, but we don't write them. */ | |
2043 | ||
2044 | #define alpha_ecoff_slurp_armap _bfd_ecoff_slurp_armap | |
2045 | #define alpha_ecoff_slurp_extended_name_table \ | |
2046 | _bfd_ecoff_slurp_extended_name_table | |
2047 | #define alpha_ecoff_construct_extended_name_table \ | |
2048 | _bfd_ecoff_construct_extended_name_table | |
2049 | #define alpha_ecoff_truncate_arname _bfd_ecoff_truncate_arname | |
2050 | #define alpha_ecoff_write_armap _bfd_ecoff_write_armap | |
2051 | #define alpha_ecoff_generic_stat_arch_elt _bfd_ecoff_generic_stat_arch_elt | |
2052 | #define alpha_ecoff_update_armap_timestamp _bfd_ecoff_update_armap_timestamp | |
2053 | ||
2054 | /* A compressed file uses this instead of ARFMAG. */ | |
2055 | ||
2056 | #define ARFZMAG "Z\012" | |
2057 | ||
2058 | /* Read an archive header. This is like the standard routine, but it | |
2059 | also accepts ARFZMAG. */ | |
2060 | ||
2061 | static PTR | |
2062 | alpha_ecoff_read_ar_hdr (abfd) | |
2063 | bfd *abfd; | |
2064 | { | |
2065 | struct areltdata *ret; | |
2066 | struct ar_hdr *h; | |
2067 | ||
2068 | ret = (struct areltdata *) _bfd_generic_read_ar_hdr_mag (abfd, ARFZMAG); | |
2069 | if (ret == NULL) | |
2070 | return NULL; | |
2071 | ||
2072 | h = (struct ar_hdr *) ret->arch_header; | |
2073 | if (strncmp (h->ar_fmag, ARFZMAG, 2) == 0) | |
2074 | { | |
2075 | bfd_byte ab[8]; | |
2076 | ||
2077 | /* This is a compressed file. We must set the size correctly. | |
2078 | The size is the eight bytes after the dummy file header. */ | |
dc810e39 AM |
2079 | if (bfd_seek (abfd, (file_ptr) FILHSZ, SEEK_CUR) != 0 |
2080 | || bfd_bread (ab, (bfd_size_type) 8, abfd) != 8 | |
2081 | || bfd_seek (abfd, (file_ptr) (- (FILHSZ + 8)), SEEK_CUR) != 0) | |
252b5132 RH |
2082 | return NULL; |
2083 | ||
dc810e39 | 2084 | ret->parsed_size = H_GET_64 (abfd, ab); |
252b5132 RH |
2085 | } |
2086 | ||
2087 | return (PTR) ret; | |
2088 | } | |
2089 | ||
2090 | /* Get an archive element at a specified file position. This is where | |
2091 | we uncompress the archive element if necessary. */ | |
2092 | ||
2093 | static bfd * | |
2094 | alpha_ecoff_get_elt_at_filepos (archive, filepos) | |
2095 | bfd *archive; | |
2096 | file_ptr filepos; | |
2097 | { | |
2098 | bfd *nbfd = NULL; | |
2099 | struct areltdata *tdata; | |
2100 | struct ar_hdr *hdr; | |
2101 | bfd_byte ab[8]; | |
2102 | bfd_size_type size; | |
2103 | bfd_byte *buf, *p; | |
2104 | struct bfd_in_memory *bim; | |
2105 | ||
2106 | nbfd = _bfd_get_elt_at_filepos (archive, filepos); | |
2107 | if (nbfd == NULL) | |
2108 | goto error_return; | |
2109 | ||
2110 | if ((nbfd->flags & BFD_IN_MEMORY) != 0) | |
2111 | { | |
2112 | /* We have already expanded this BFD. */ | |
2113 | return nbfd; | |
2114 | } | |
2115 | ||
2116 | tdata = (struct areltdata *) nbfd->arelt_data; | |
2117 | hdr = (struct ar_hdr *) tdata->arch_header; | |
2118 | if (strncmp (hdr->ar_fmag, ARFZMAG, 2) != 0) | |
2119 | return nbfd; | |
2120 | ||
2121 | /* We must uncompress this element. We do this by copying it into a | |
dc810e39 | 2122 | memory buffer, and making bfd_bread and bfd_seek use that buffer. |
252b5132 RH |
2123 | This can use a lot of memory, but it's simpler than getting a |
2124 | temporary file, making that work with the file descriptor caching | |
2125 | code, and making sure that it is deleted at all appropriate | |
2126 | times. It can be changed if it ever becomes important. */ | |
2127 | ||
2128 | /* The compressed file starts with a dummy ECOFF file header. */ | |
dc810e39 | 2129 | if (bfd_seek (nbfd, (file_ptr) FILHSZ, SEEK_SET) != 0) |
252b5132 RH |
2130 | goto error_return; |
2131 | ||
2132 | /* The next eight bytes are the real file size. */ | |
dc810e39 | 2133 | if (bfd_bread (ab, (bfd_size_type) 8, nbfd) != 8) |
252b5132 | 2134 | goto error_return; |
dc810e39 | 2135 | size = H_GET_64 (nbfd, ab); |
252b5132 RH |
2136 | |
2137 | if (size == 0) | |
2138 | buf = NULL; | |
2139 | else | |
2140 | { | |
2141 | bfd_size_type left; | |
2142 | bfd_byte dict[4096]; | |
2143 | unsigned int h; | |
2144 | bfd_byte b; | |
2145 | ||
2146 | buf = (bfd_byte *) bfd_alloc (nbfd, size); | |
2147 | if (buf == NULL) | |
2148 | goto error_return; | |
2149 | p = buf; | |
2150 | ||
2151 | left = size; | |
2152 | ||
346ceb11 | 2153 | /* I don't know what the next eight bytes are for. */ |
dc810e39 | 2154 | if (bfd_bread (ab, (bfd_size_type) 8, nbfd) != 8) |
252b5132 RH |
2155 | goto error_return; |
2156 | ||
2157 | /* This is the uncompression algorithm. It's a simple | |
2158 | dictionary based scheme in which each character is predicted | |
2159 | by a hash of the previous three characters. A control byte | |
2160 | indicates whether the character is predicted or whether it | |
2161 | appears in the input stream; each control byte manages the | |
2162 | next eight bytes in the output stream. */ | |
2163 | memset (dict, 0, sizeof dict); | |
2164 | h = 0; | |
dc810e39 | 2165 | while (bfd_bread (&b, (bfd_size_type) 1, nbfd) == 1) |
252b5132 RH |
2166 | { |
2167 | unsigned int i; | |
2168 | ||
2169 | for (i = 0; i < 8; i++, b >>= 1) | |
2170 | { | |
2171 | bfd_byte n; | |
2172 | ||
2173 | if ((b & 1) == 0) | |
2174 | n = dict[h]; | |
2175 | else | |
2176 | { | |
dc810e39 | 2177 | if (! bfd_bread (&n, (bfd_size_type) 1, nbfd)) |
252b5132 RH |
2178 | goto error_return; |
2179 | dict[h] = n; | |
2180 | } | |
2181 | ||
2182 | *p++ = n; | |
2183 | ||
2184 | --left; | |
2185 | if (left == 0) | |
2186 | break; | |
2187 | ||
2188 | h <<= 4; | |
2189 | h ^= n; | |
2190 | h &= sizeof dict - 1; | |
2191 | } | |
2192 | ||
2193 | if (left == 0) | |
2194 | break; | |
2195 | } | |
2196 | } | |
2197 | ||
2198 | /* Now the uncompressed file contents are in buf. */ | |
2199 | bim = ((struct bfd_in_memory *) | |
dc810e39 | 2200 | bfd_alloc (nbfd, (bfd_size_type) sizeof (struct bfd_in_memory))); |
252b5132 RH |
2201 | if (bim == NULL) |
2202 | goto error_return; | |
2203 | bim->size = size; | |
2204 | bim->buffer = buf; | |
2205 | ||
b34976b6 | 2206 | nbfd->mtime_set = TRUE; |
252b5132 RH |
2207 | nbfd->mtime = strtol (hdr->ar_date, (char **) NULL, 10); |
2208 | ||
2209 | nbfd->flags |= BFD_IN_MEMORY; | |
2210 | nbfd->iostream = (PTR) bim; | |
2211 | BFD_ASSERT (! nbfd->cacheable); | |
2212 | ||
2213 | return nbfd; | |
2214 | ||
2215 | error_return: | |
2216 | if (nbfd != NULL) | |
2217 | bfd_close (nbfd); | |
346ceb11 | 2218 | return NULL; |
252b5132 RH |
2219 | } |
2220 | ||
2221 | /* Open the next archived file. */ | |
2222 | ||
2223 | static bfd * | |
2224 | alpha_ecoff_openr_next_archived_file (archive, last_file) | |
2225 | bfd *archive; | |
2226 | bfd *last_file; | |
2227 | { | |
2228 | file_ptr filestart; | |
2229 | ||
2230 | if (last_file == NULL) | |
2231 | filestart = bfd_ardata (archive)->first_file_filepos; | |
2232 | else | |
2233 | { | |
2234 | struct areltdata *t; | |
2235 | struct ar_hdr *h; | |
2236 | bfd_size_type size; | |
2237 | ||
2238 | /* We can't use arelt_size here, because that uses parsed_size, | |
2239 | which is the uncompressed size. We need the compressed size. */ | |
2240 | t = (struct areltdata *) last_file->arelt_data; | |
2241 | h = (struct ar_hdr *) t->arch_header; | |
2242 | size = strtol (h->ar_size, (char **) NULL, 10); | |
2243 | ||
2244 | /* Pad to an even boundary... | |
2245 | Note that last_file->origin can be odd in the case of | |
346ceb11 | 2246 | BSD-4.4-style element with a long odd size. */ |
252b5132 RH |
2247 | filestart = last_file->origin + size; |
2248 | filestart += filestart % 2; | |
2249 | } | |
2250 | ||
2251 | return alpha_ecoff_get_elt_at_filepos (archive, filestart); | |
2252 | } | |
2253 | ||
2254 | /* Open the archive file given an index into the armap. */ | |
2255 | ||
2256 | static bfd * | |
2257 | alpha_ecoff_get_elt_at_index (abfd, index) | |
2258 | bfd *abfd; | |
2259 | symindex index; | |
2260 | { | |
2261 | carsym *entry; | |
2262 | ||
2263 | entry = bfd_ardata (abfd)->symdefs + index; | |
2264 | return alpha_ecoff_get_elt_at_filepos (abfd, entry->file_offset); | |
2265 | } | |
2266 | \f | |
2267 | /* This is the ECOFF backend structure. The backend field of the | |
2268 | target vector points to this. */ | |
2269 | ||
2270 | static const struct ecoff_backend_data alpha_ecoff_backend_data = | |
2271 | { | |
2272 | /* COFF backend structure. */ | |
2273 | { | |
2274 | (void (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR))) bfd_void, /* aux_in */ | |
2275 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */ | |
2276 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */ | |
2277 | (unsigned (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR)))bfd_void,/*aux_out*/ | |
2278 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */ | |
2279 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */ | |
2280 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */ | |
2281 | alpha_ecoff_swap_filehdr_out, alpha_ecoff_swap_aouthdr_out, | |
2282 | alpha_ecoff_swap_scnhdr_out, | |
b34976b6 | 2283 | FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, TRUE, FALSE, 4, FALSE, 2, |
252b5132 RH |
2284 | alpha_ecoff_swap_filehdr_in, alpha_ecoff_swap_aouthdr_in, |
2285 | alpha_ecoff_swap_scnhdr_in, NULL, | |
2286 | alpha_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook, | |
2287 | alpha_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags, | |
2288 | _bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table, | |
7b50b349 ILT |
2289 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
2290 | NULL, NULL, NULL | |
252b5132 RH |
2291 | }, |
2292 | /* Supported architecture. */ | |
2293 | bfd_arch_alpha, | |
2294 | /* Initial portion of armap string. */ | |
2295 | "________64", | |
2296 | /* The page boundary used to align sections in a demand-paged | |
2297 | executable file. E.g., 0x1000. */ | |
2298 | 0x2000, | |
b34976b6 AM |
2299 | /* TRUE if the .rdata section is part of the text segment, as on the |
2300 | Alpha. FALSE if .rdata is part of the data segment, as on the | |
252b5132 | 2301 | MIPS. */ |
b34976b6 | 2302 | TRUE, |
252b5132 RH |
2303 | /* Bitsize of constructor entries. */ |
2304 | 64, | |
2305 | /* Reloc to use for constructor entries. */ | |
2306 | &alpha_howto_table[ALPHA_R_REFQUAD], | |
2307 | { | |
2308 | /* Symbol table magic number. */ | |
2309 | magicSym2, | |
2310 | /* Alignment of debugging information. E.g., 4. */ | |
2311 | 8, | |
2312 | /* Sizes of external symbolic information. */ | |
2313 | sizeof (struct hdr_ext), | |
2314 | sizeof (struct dnr_ext), | |
2315 | sizeof (struct pdr_ext), | |
2316 | sizeof (struct sym_ext), | |
2317 | sizeof (struct opt_ext), | |
2318 | sizeof (struct fdr_ext), | |
2319 | sizeof (struct rfd_ext), | |
2320 | sizeof (struct ext_ext), | |
2321 | /* Functions to swap in external symbolic data. */ | |
2322 | ecoff_swap_hdr_in, | |
2323 | ecoff_swap_dnr_in, | |
2324 | ecoff_swap_pdr_in, | |
2325 | ecoff_swap_sym_in, | |
2326 | ecoff_swap_opt_in, | |
2327 | ecoff_swap_fdr_in, | |
2328 | ecoff_swap_rfd_in, | |
2329 | ecoff_swap_ext_in, | |
2330 | _bfd_ecoff_swap_tir_in, | |
2331 | _bfd_ecoff_swap_rndx_in, | |
2332 | /* Functions to swap out external symbolic data. */ | |
2333 | ecoff_swap_hdr_out, | |
2334 | ecoff_swap_dnr_out, | |
2335 | ecoff_swap_pdr_out, | |
2336 | ecoff_swap_sym_out, | |
2337 | ecoff_swap_opt_out, | |
2338 | ecoff_swap_fdr_out, | |
2339 | ecoff_swap_rfd_out, | |
2340 | ecoff_swap_ext_out, | |
2341 | _bfd_ecoff_swap_tir_out, | |
2342 | _bfd_ecoff_swap_rndx_out, | |
2343 | /* Function to read in symbolic data. */ | |
2344 | _bfd_ecoff_slurp_symbolic_info | |
2345 | }, | |
2346 | /* External reloc size. */ | |
2347 | RELSZ, | |
2348 | /* Reloc swapping functions. */ | |
2349 | alpha_ecoff_swap_reloc_in, | |
2350 | alpha_ecoff_swap_reloc_out, | |
2351 | /* Backend reloc tweaking. */ | |
2352 | alpha_adjust_reloc_in, | |
2353 | alpha_adjust_reloc_out, | |
2354 | /* Relocate section contents while linking. */ | |
2355 | alpha_relocate_section, | |
2356 | /* Do final adjustments to filehdr and aouthdr. */ | |
2357 | alpha_adjust_headers, | |
2358 | /* Read an element from an archive at a given file position. */ | |
2359 | alpha_ecoff_get_elt_at_filepos | |
2360 | }; | |
2361 | ||
2362 | /* Looking up a reloc type is Alpha specific. */ | |
2363 | #define _bfd_ecoff_bfd_reloc_type_lookup alpha_bfd_reloc_type_lookup | |
2364 | ||
2365 | /* So is getting relocated section contents. */ | |
2366 | #define _bfd_ecoff_bfd_get_relocated_section_contents \ | |
2367 | alpha_ecoff_get_relocated_section_contents | |
2368 | ||
2369 | /* Handling file windows is generic. */ | |
2370 | #define _bfd_ecoff_get_section_contents_in_window \ | |
2371 | _bfd_generic_get_section_contents_in_window | |
2372 | ||
2373 | /* Relaxing sections is generic. */ | |
2374 | #define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section | |
2375 | #define _bfd_ecoff_bfd_gc_sections bfd_generic_gc_sections | |
8550eb6e | 2376 | #define _bfd_ecoff_bfd_merge_sections bfd_generic_merge_sections |
72adc230 | 2377 | #define _bfd_ecoff_bfd_is_group_section bfd_generic_is_group_section |
e61463e1 | 2378 | #define _bfd_ecoff_bfd_discard_group bfd_generic_discard_group |
082b7297 L |
2379 | #define _bfd_ecoff_section_already_linked \ |
2380 | _bfd_generic_section_already_linked | |
252b5132 RH |
2381 | |
2382 | const bfd_target ecoffalpha_little_vec = | |
2383 | { | |
2384 | "ecoff-littlealpha", /* name */ | |
2385 | bfd_target_ecoff_flavour, | |
2386 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
2387 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
2388 | ||
2389 | (HAS_RELOC | EXEC_P | /* object flags */ | |
2390 | HAS_LINENO | HAS_DEBUG | | |
2391 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), | |
2392 | ||
2393 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), | |
2394 | 0, /* leading underscore */ | |
2395 | ' ', /* ar_pad_char */ | |
2396 | 15, /* ar_max_namelen */ | |
2397 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2398 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2399 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
2400 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2401 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2402 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
2403 | ||
2404 | {_bfd_dummy_target, alpha_ecoff_object_p, /* bfd_check_format */ | |
2405 | _bfd_ecoff_archive_p, _bfd_dummy_target}, | |
2406 | {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */ | |
2407 | _bfd_generic_mkarchive, bfd_false}, | |
2408 | {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */ | |
2409 | _bfd_write_archive_contents, bfd_false}, | |
2410 | ||
2411 | BFD_JUMP_TABLE_GENERIC (_bfd_ecoff), | |
2412 | BFD_JUMP_TABLE_COPY (_bfd_ecoff), | |
2413 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
2414 | BFD_JUMP_TABLE_ARCHIVE (alpha_ecoff), | |
2415 | BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff), | |
2416 | BFD_JUMP_TABLE_RELOCS (_bfd_ecoff), | |
2417 | BFD_JUMP_TABLE_WRITE (_bfd_ecoff), | |
2418 | BFD_JUMP_TABLE_LINK (_bfd_ecoff), | |
2419 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
2420 | ||
c3c89269 | 2421 | NULL, |
346ceb11 | 2422 | |
252b5132 RH |
2423 | (PTR) &alpha_ecoff_backend_data |
2424 | }; |