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, |
88183869 | 3 | 2003, 2004, 2005, 2007, 2008, 2009 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 | ||
cd123cb7 | 7 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 8 | |
cd123cb7 NC |
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 3 of the License, or | |
12 | (at your option) any later version. | |
252b5132 | 13 | |
cd123cb7 NC |
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. | |
252b5132 | 18 | |
cd123cb7 NC |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | MA 02110-1301, USA. */ | |
252b5132 | 23 | |
252b5132 | 24 | #include "sysdep.h" |
3db64b00 | 25 | #include "bfd.h" |
252b5132 RH |
26 | #include "bfdlink.h" |
27 | #include "libbfd.h" | |
28 | #include "coff/internal.h" | |
29 | #include "coff/sym.h" | |
30 | #include "coff/symconst.h" | |
31 | #include "coff/ecoff.h" | |
32 | #include "coff/alpha.h" | |
33 | #include "aout/ar.h" | |
34 | #include "libcoff.h" | |
35 | #include "libecoff.h" | |
36 | \f | |
37 | /* Prototypes for static functions. */ | |
38 | ||
b34976b6 AM |
39 | static const bfd_target *alpha_ecoff_object_p |
40 | PARAMS ((bfd *)); | |
41 | static bfd_boolean alpha_ecoff_bad_format_hook | |
42 | PARAMS ((bfd *abfd, PTR filehdr)); | |
43 | static PTR alpha_ecoff_mkobject_hook | |
44 | PARAMS ((bfd *, PTR filehdr, PTR aouthdr)); | |
45 | static void alpha_ecoff_swap_reloc_in | |
46 | PARAMS ((bfd *, PTR, struct internal_reloc *)); | |
47 | static void alpha_ecoff_swap_reloc_out | |
48 | PARAMS ((bfd *, const struct internal_reloc *, PTR)); | |
49 | static void alpha_adjust_reloc_in | |
50 | PARAMS ((bfd *, const struct internal_reloc *, arelent *)); | |
51 | static void alpha_adjust_reloc_out | |
52 | PARAMS ((bfd *, const arelent *, struct internal_reloc *)); | |
252b5132 | 53 | static reloc_howto_type *alpha_bfd_reloc_type_lookup |
b34976b6 | 54 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
252b5132 RH |
55 | static bfd_byte *alpha_ecoff_get_relocated_section_contents |
56 | PARAMS ((bfd *abfd, struct bfd_link_info *, struct bfd_link_order *, | |
1049f94e | 57 | bfd_byte *data, bfd_boolean relocatable, asymbol **symbols)); |
252b5132 RH |
58 | static bfd_vma alpha_convert_external_reloc |
59 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, struct external_reloc *, | |
60 | struct ecoff_link_hash_entry *)); | |
b34976b6 AM |
61 | static bfd_boolean alpha_relocate_section |
62 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, PTR)); | |
63 | static bfd_boolean alpha_adjust_headers | |
252b5132 | 64 | PARAMS ((bfd *, struct internal_filehdr *, struct internal_aouthdr *)); |
b34976b6 AM |
65 | static PTR alpha_ecoff_read_ar_hdr |
66 | PARAMS ((bfd *)); | |
67 | static bfd *alpha_ecoff_get_elt_at_filepos | |
68 | PARAMS ((bfd *, file_ptr)); | |
69 | static bfd *alpha_ecoff_openr_next_archived_file | |
70 | PARAMS ((bfd *, bfd *)); | |
71 | static bfd *alpha_ecoff_get_elt_at_index | |
72 | PARAMS ((bfd *, symindex)); | |
252b5132 RH |
73 | \f |
74 | /* ECOFF has COFF sections, but the debugging information is stored in | |
75 | a completely different format. ECOFF targets use some of the | |
76 | swapping routines from coffswap.h, and some of the generic COFF | |
77 | routines in coffgen.c, but, unlike the real COFF targets, do not | |
78 | use coffcode.h itself. | |
79 | ||
80 | Get the generic COFF swapping routines, except for the reloc, | |
81 | symbol, and lineno ones. Give them ecoff names. Define some | |
82 | accessor macros for the large sizes used for Alpha ECOFF. */ | |
83 | ||
dc810e39 AM |
84 | #define GET_FILEHDR_SYMPTR H_GET_64 |
85 | #define PUT_FILEHDR_SYMPTR H_PUT_64 | |
86 | #define GET_AOUTHDR_TSIZE H_GET_64 | |
87 | #define PUT_AOUTHDR_TSIZE H_PUT_64 | |
88 | #define GET_AOUTHDR_DSIZE H_GET_64 | |
89 | #define PUT_AOUTHDR_DSIZE H_PUT_64 | |
90 | #define GET_AOUTHDR_BSIZE H_GET_64 | |
91 | #define PUT_AOUTHDR_BSIZE H_PUT_64 | |
92 | #define GET_AOUTHDR_ENTRY H_GET_64 | |
93 | #define PUT_AOUTHDR_ENTRY H_PUT_64 | |
94 | #define GET_AOUTHDR_TEXT_START H_GET_64 | |
95 | #define PUT_AOUTHDR_TEXT_START H_PUT_64 | |
96 | #define GET_AOUTHDR_DATA_START H_GET_64 | |
97 | #define PUT_AOUTHDR_DATA_START H_PUT_64 | |
98 | #define GET_SCNHDR_PADDR H_GET_64 | |
99 | #define PUT_SCNHDR_PADDR H_PUT_64 | |
100 | #define GET_SCNHDR_VADDR H_GET_64 | |
101 | #define PUT_SCNHDR_VADDR H_PUT_64 | |
102 | #define GET_SCNHDR_SIZE H_GET_64 | |
103 | #define PUT_SCNHDR_SIZE H_PUT_64 | |
104 | #define GET_SCNHDR_SCNPTR H_GET_64 | |
105 | #define PUT_SCNHDR_SCNPTR H_PUT_64 | |
106 | #define GET_SCNHDR_RELPTR H_GET_64 | |
107 | #define PUT_SCNHDR_RELPTR H_PUT_64 | |
108 | #define GET_SCNHDR_LNNOPTR H_GET_64 | |
109 | #define PUT_SCNHDR_LNNOPTR H_PUT_64 | |
252b5132 RH |
110 | |
111 | #define ALPHAECOFF | |
112 | ||
113 | #define NO_COFF_RELOCS | |
114 | #define NO_COFF_SYMBOLS | |
115 | #define NO_COFF_LINENOS | |
116 | #define coff_swap_filehdr_in alpha_ecoff_swap_filehdr_in | |
117 | #define coff_swap_filehdr_out alpha_ecoff_swap_filehdr_out | |
118 | #define coff_swap_aouthdr_in alpha_ecoff_swap_aouthdr_in | |
119 | #define coff_swap_aouthdr_out alpha_ecoff_swap_aouthdr_out | |
120 | #define coff_swap_scnhdr_in alpha_ecoff_swap_scnhdr_in | |
121 | #define coff_swap_scnhdr_out alpha_ecoff_swap_scnhdr_out | |
122 | #include "coffswap.h" | |
123 | ||
124 | /* Get the ECOFF swapping routines. */ | |
125 | #define ECOFF_64 | |
126 | #include "ecoffswap.h" | |
127 | \f | |
128 | /* How to process the various reloc types. */ | |
129 | ||
b34976b6 AM |
130 | static bfd_reloc_status_type reloc_nil |
131 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
252b5132 RH |
132 | |
133 | static bfd_reloc_status_type | |
134 | reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message) | |
b2747490 AJ |
135 | bfd *abfd ATTRIBUTE_UNUSED; |
136 | arelent *reloc ATTRIBUTE_UNUSED; | |
137 | asymbol *sym ATTRIBUTE_UNUSED; | |
138 | PTR data ATTRIBUTE_UNUSED; | |
139 | asection *sec ATTRIBUTE_UNUSED; | |
140 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
141 | char **error_message ATTRIBUTE_UNUSED; | |
252b5132 RH |
142 | { |
143 | return bfd_reloc_ok; | |
144 | } | |
145 | ||
146 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
147 | from smaller values. Start with zero, widen, *then* decrement. */ | |
148 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
149 | ||
150 | static reloc_howto_type alpha_howto_table[] = | |
151 | { | |
152 | /* Reloc type 0 is ignored by itself. However, it appears after a | |
153 | GPDISP reloc to identify the location where the low order 16 bits | |
154 | of the gp register are loaded. */ | |
155 | HOWTO (ALPHA_R_IGNORE, /* type */ | |
156 | 0, /* rightshift */ | |
157 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
158 | 8, /* bitsize */ | |
b34976b6 | 159 | TRUE, /* pc_relative */ |
252b5132 RH |
160 | 0, /* bitpos */ |
161 | complain_overflow_dont, /* complain_on_overflow */ | |
162 | reloc_nil, /* special_function */ | |
163 | "IGNORE", /* name */ | |
b34976b6 | 164 | TRUE, /* partial_inplace */ |
252b5132 RH |
165 | 0, /* src_mask */ |
166 | 0, /* dst_mask */ | |
b34976b6 | 167 | TRUE), /* pcrel_offset */ |
252b5132 RH |
168 | |
169 | /* A 32 bit reference to a symbol. */ | |
170 | HOWTO (ALPHA_R_REFLONG, /* type */ | |
171 | 0, /* rightshift */ | |
172 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
173 | 32, /* bitsize */ | |
b34976b6 | 174 | FALSE, /* pc_relative */ |
252b5132 RH |
175 | 0, /* bitpos */ |
176 | complain_overflow_bitfield, /* complain_on_overflow */ | |
177 | 0, /* special_function */ | |
178 | "REFLONG", /* name */ | |
b34976b6 | 179 | TRUE, /* partial_inplace */ |
252b5132 RH |
180 | 0xffffffff, /* src_mask */ |
181 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 182 | FALSE), /* pcrel_offset */ |
252b5132 RH |
183 | |
184 | /* A 64 bit reference to a symbol. */ | |
185 | HOWTO (ALPHA_R_REFQUAD, /* type */ | |
186 | 0, /* rightshift */ | |
187 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
188 | 64, /* bitsize */ | |
b34976b6 | 189 | FALSE, /* pc_relative */ |
252b5132 RH |
190 | 0, /* bitpos */ |
191 | complain_overflow_bitfield, /* complain_on_overflow */ | |
192 | 0, /* special_function */ | |
193 | "REFQUAD", /* name */ | |
b34976b6 | 194 | TRUE, /* partial_inplace */ |
252b5132 RH |
195 | MINUS_ONE, /* src_mask */ |
196 | MINUS_ONE, /* dst_mask */ | |
b34976b6 | 197 | FALSE), /* pcrel_offset */ |
252b5132 RH |
198 | |
199 | /* A 32 bit GP relative offset. This is just like REFLONG except | |
200 | that when the value is used the value of the gp register will be | |
201 | added in. */ | |
202 | HOWTO (ALPHA_R_GPREL32, /* type */ | |
203 | 0, /* rightshift */ | |
204 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
205 | 32, /* bitsize */ | |
b34976b6 | 206 | FALSE, /* pc_relative */ |
252b5132 RH |
207 | 0, /* bitpos */ |
208 | complain_overflow_bitfield, /* complain_on_overflow */ | |
209 | 0, /* special_function */ | |
210 | "GPREL32", /* name */ | |
b34976b6 | 211 | TRUE, /* partial_inplace */ |
252b5132 RH |
212 | 0xffffffff, /* src_mask */ |
213 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 214 | FALSE), /* pcrel_offset */ |
252b5132 RH |
215 | |
216 | /* Used for an instruction that refers to memory off the GP | |
217 | register. The offset is 16 bits of the 32 bit instruction. This | |
218 | reloc always seems to be against the .lita section. */ | |
219 | HOWTO (ALPHA_R_LITERAL, /* type */ | |
220 | 0, /* rightshift */ | |
221 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
222 | 16, /* bitsize */ | |
b34976b6 | 223 | FALSE, /* pc_relative */ |
252b5132 RH |
224 | 0, /* bitpos */ |
225 | complain_overflow_signed, /* complain_on_overflow */ | |
226 | 0, /* special_function */ | |
227 | "LITERAL", /* name */ | |
b34976b6 | 228 | TRUE, /* partial_inplace */ |
252b5132 RH |
229 | 0xffff, /* src_mask */ |
230 | 0xffff, /* dst_mask */ | |
b34976b6 | 231 | FALSE), /* pcrel_offset */ |
252b5132 RH |
232 | |
233 | /* This reloc only appears immediately following a LITERAL reloc. | |
234 | It identifies a use of the literal. It seems that the linker can | |
235 | use this to eliminate a portion of the .lita section. The symbol | |
236 | index is special: 1 means the literal address is in the base | |
237 | register of a memory format instruction; 2 means the literal | |
238 | address is in the byte offset register of a byte-manipulation | |
239 | instruction; 3 means the literal address is in the target | |
240 | register of a jsr instruction. This does not actually do any | |
241 | relocation. */ | |
242 | HOWTO (ALPHA_R_LITUSE, /* type */ | |
243 | 0, /* rightshift */ | |
244 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
245 | 32, /* bitsize */ | |
b34976b6 | 246 | FALSE, /* pc_relative */ |
252b5132 RH |
247 | 0, /* bitpos */ |
248 | complain_overflow_dont, /* complain_on_overflow */ | |
249 | reloc_nil, /* special_function */ | |
250 | "LITUSE", /* name */ | |
b34976b6 | 251 | FALSE, /* partial_inplace */ |
252b5132 RH |
252 | 0, /* src_mask */ |
253 | 0, /* dst_mask */ | |
b34976b6 | 254 | FALSE), /* pcrel_offset */ |
252b5132 RH |
255 | |
256 | /* Load the gp register. This is always used for a ldah instruction | |
257 | which loads the upper 16 bits of the gp register. The next reloc | |
258 | will be an IGNORE reloc which identifies the location of the lda | |
259 | instruction which loads the lower 16 bits. The symbol index of | |
260 | the GPDISP instruction appears to actually be the number of bytes | |
261 | between the ldah and lda instructions. This gives two different | |
262 | ways to determine where the lda instruction is; I don't know why | |
263 | both are used. The value to use for the relocation is the | |
264 | difference between the GP value and the current location; the | |
265 | load will always be done against a register holding the current | |
266 | address. */ | |
267 | HOWTO (ALPHA_R_GPDISP, /* type */ | |
268 | 16, /* rightshift */ | |
269 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
270 | 16, /* bitsize */ | |
b34976b6 | 271 | TRUE, /* pc_relative */ |
252b5132 RH |
272 | 0, /* bitpos */ |
273 | complain_overflow_dont, /* complain_on_overflow */ | |
274 | reloc_nil, /* special_function */ | |
275 | "GPDISP", /* name */ | |
b34976b6 | 276 | TRUE, /* partial_inplace */ |
252b5132 RH |
277 | 0xffff, /* src_mask */ |
278 | 0xffff, /* dst_mask */ | |
b34976b6 | 279 | TRUE), /* pcrel_offset */ |
252b5132 RH |
280 | |
281 | /* A 21 bit branch. The native assembler generates these for | |
282 | branches within the text segment, and also fills in the PC | |
283 | relative offset in the instruction. */ | |
284 | HOWTO (ALPHA_R_BRADDR, /* type */ | |
285 | 2, /* rightshift */ | |
286 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
287 | 21, /* bitsize */ | |
b34976b6 | 288 | TRUE, /* pc_relative */ |
252b5132 RH |
289 | 0, /* bitpos */ |
290 | complain_overflow_signed, /* complain_on_overflow */ | |
291 | 0, /* special_function */ | |
292 | "BRADDR", /* name */ | |
b34976b6 | 293 | TRUE, /* partial_inplace */ |
252b5132 RH |
294 | 0x1fffff, /* src_mask */ |
295 | 0x1fffff, /* dst_mask */ | |
b34976b6 | 296 | FALSE), /* pcrel_offset */ |
252b5132 RH |
297 | |
298 | /* A hint for a jump to a register. */ | |
299 | HOWTO (ALPHA_R_HINT, /* type */ | |
300 | 2, /* rightshift */ | |
301 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
302 | 14, /* bitsize */ | |
b34976b6 | 303 | TRUE, /* pc_relative */ |
252b5132 RH |
304 | 0, /* bitpos */ |
305 | complain_overflow_dont, /* complain_on_overflow */ | |
306 | 0, /* special_function */ | |
307 | "HINT", /* name */ | |
b34976b6 | 308 | TRUE, /* partial_inplace */ |
252b5132 RH |
309 | 0x3fff, /* src_mask */ |
310 | 0x3fff, /* dst_mask */ | |
b34976b6 | 311 | FALSE), /* pcrel_offset */ |
252b5132 RH |
312 | |
313 | /* 16 bit PC relative offset. */ | |
314 | HOWTO (ALPHA_R_SREL16, /* type */ | |
315 | 0, /* rightshift */ | |
316 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
317 | 16, /* bitsize */ | |
b34976b6 | 318 | TRUE, /* pc_relative */ |
252b5132 RH |
319 | 0, /* bitpos */ |
320 | complain_overflow_signed, /* complain_on_overflow */ | |
321 | 0, /* special_function */ | |
322 | "SREL16", /* name */ | |
b34976b6 | 323 | TRUE, /* partial_inplace */ |
252b5132 RH |
324 | 0xffff, /* src_mask */ |
325 | 0xffff, /* dst_mask */ | |
b34976b6 | 326 | FALSE), /* pcrel_offset */ |
252b5132 RH |
327 | |
328 | /* 32 bit PC relative offset. */ | |
329 | HOWTO (ALPHA_R_SREL32, /* type */ | |
330 | 0, /* rightshift */ | |
331 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
332 | 32, /* bitsize */ | |
b34976b6 | 333 | TRUE, /* pc_relative */ |
252b5132 RH |
334 | 0, /* bitpos */ |
335 | complain_overflow_signed, /* complain_on_overflow */ | |
336 | 0, /* special_function */ | |
337 | "SREL32", /* name */ | |
b34976b6 | 338 | TRUE, /* partial_inplace */ |
252b5132 RH |
339 | 0xffffffff, /* src_mask */ |
340 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 341 | FALSE), /* pcrel_offset */ |
252b5132 RH |
342 | |
343 | /* A 64 bit PC relative offset. */ | |
344 | HOWTO (ALPHA_R_SREL64, /* type */ | |
345 | 0, /* rightshift */ | |
346 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
347 | 64, /* bitsize */ | |
b34976b6 | 348 | TRUE, /* pc_relative */ |
252b5132 RH |
349 | 0, /* bitpos */ |
350 | complain_overflow_signed, /* complain_on_overflow */ | |
351 | 0, /* special_function */ | |
352 | "SREL64", /* name */ | |
b34976b6 | 353 | TRUE, /* partial_inplace */ |
252b5132 RH |
354 | MINUS_ONE, /* src_mask */ |
355 | MINUS_ONE, /* dst_mask */ | |
b34976b6 | 356 | FALSE), /* pcrel_offset */ |
252b5132 RH |
357 | |
358 | /* Push a value on the reloc evaluation stack. */ | |
359 | HOWTO (ALPHA_R_OP_PUSH, /* type */ | |
360 | 0, /* rightshift */ | |
361 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
362 | 0, /* bitsize */ | |
b34976b6 | 363 | FALSE, /* pc_relative */ |
252b5132 RH |
364 | 0, /* bitpos */ |
365 | complain_overflow_dont, /* complain_on_overflow */ | |
366 | 0, /* special_function */ | |
367 | "OP_PUSH", /* name */ | |
b34976b6 | 368 | FALSE, /* partial_inplace */ |
252b5132 RH |
369 | 0, /* src_mask */ |
370 | 0, /* dst_mask */ | |
b34976b6 | 371 | FALSE), /* pcrel_offset */ |
252b5132 RH |
372 | |
373 | /* Store the value from the stack at the given address. Store it in | |
374 | a bitfield of size r_size starting at bit position r_offset. */ | |
375 | HOWTO (ALPHA_R_OP_STORE, /* type */ | |
376 | 0, /* rightshift */ | |
377 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
378 | 64, /* bitsize */ | |
b34976b6 | 379 | FALSE, /* pc_relative */ |
252b5132 RH |
380 | 0, /* bitpos */ |
381 | complain_overflow_dont, /* complain_on_overflow */ | |
382 | 0, /* special_function */ | |
383 | "OP_STORE", /* name */ | |
b34976b6 | 384 | FALSE, /* partial_inplace */ |
252b5132 RH |
385 | 0, /* src_mask */ |
386 | MINUS_ONE, /* dst_mask */ | |
b34976b6 | 387 | FALSE), /* pcrel_offset */ |
252b5132 RH |
388 | |
389 | /* Subtract the reloc address from the value on the top of the | |
390 | relocation stack. */ | |
391 | HOWTO (ALPHA_R_OP_PSUB, /* type */ | |
392 | 0, /* rightshift */ | |
393 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
394 | 0, /* bitsize */ | |
b34976b6 | 395 | FALSE, /* pc_relative */ |
252b5132 RH |
396 | 0, /* bitpos */ |
397 | complain_overflow_dont, /* complain_on_overflow */ | |
398 | 0, /* special_function */ | |
399 | "OP_PSUB", /* name */ | |
b34976b6 | 400 | FALSE, /* partial_inplace */ |
252b5132 RH |
401 | 0, /* src_mask */ |
402 | 0, /* dst_mask */ | |
b34976b6 | 403 | FALSE), /* pcrel_offset */ |
252b5132 RH |
404 | |
405 | /* Shift the value on the top of the relocation stack right by the | |
406 | given value. */ | |
407 | HOWTO (ALPHA_R_OP_PRSHIFT, /* type */ | |
408 | 0, /* rightshift */ | |
409 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
410 | 0, /* bitsize */ | |
b34976b6 | 411 | FALSE, /* pc_relative */ |
252b5132 RH |
412 | 0, /* bitpos */ |
413 | complain_overflow_dont, /* complain_on_overflow */ | |
414 | 0, /* special_function */ | |
415 | "OP_PRSHIFT", /* name */ | |
b34976b6 | 416 | FALSE, /* partial_inplace */ |
252b5132 RH |
417 | 0, /* src_mask */ |
418 | 0, /* dst_mask */ | |
b34976b6 | 419 | FALSE), /* pcrel_offset */ |
252b5132 RH |
420 | |
421 | /* Adjust the GP value for a new range in the object file. */ | |
422 | HOWTO (ALPHA_R_GPVALUE, /* type */ | |
423 | 0, /* rightshift */ | |
424 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
425 | 0, /* bitsize */ | |
b34976b6 | 426 | FALSE, /* pc_relative */ |
252b5132 RH |
427 | 0, /* bitpos */ |
428 | complain_overflow_dont, /* complain_on_overflow */ | |
429 | 0, /* special_function */ | |
430 | "GPVALUE", /* name */ | |
b34976b6 | 431 | FALSE, /* partial_inplace */ |
252b5132 RH |
432 | 0, /* src_mask */ |
433 | 0, /* dst_mask */ | |
b34976b6 | 434 | FALSE) /* pcrel_offset */ |
252b5132 RH |
435 | }; |
436 | \f | |
437 | /* Recognize an Alpha ECOFF file. */ | |
438 | ||
439 | static const bfd_target * | |
440 | alpha_ecoff_object_p (abfd) | |
441 | bfd *abfd; | |
442 | { | |
443 | static const bfd_target *ret; | |
444 | ||
445 | ret = coff_object_p (abfd); | |
446 | ||
447 | if (ret != NULL) | |
448 | { | |
449 | asection *sec; | |
450 | ||
451 | /* Alpha ECOFF has a .pdata section. The lnnoptr field of the | |
452 | .pdata section is the number of entries it contains. Each | |
453 | entry takes up 8 bytes. The number of entries is required | |
454 | since the section is aligned to a 16 byte boundary. When we | |
455 | link .pdata sections together, we do not want to include the | |
456 | alignment bytes. We handle this on input by faking the size | |
457 | of the .pdata section to remove the unwanted alignment bytes. | |
458 | On output we will set the lnnoptr field and force the | |
459 | alignment. */ | |
460 | sec = bfd_get_section_by_name (abfd, _PDATA); | |
461 | if (sec != (asection *) NULL) | |
462 | { | |
463 | bfd_size_type size; | |
464 | ||
465 | size = sec->line_filepos * 8; | |
eea6121a AM |
466 | BFD_ASSERT (size == sec->size |
467 | || size + 8 == sec->size); | |
252b5132 RH |
468 | if (! bfd_set_section_size (abfd, sec, size)) |
469 | return NULL; | |
470 | } | |
471 | } | |
472 | ||
473 | return ret; | |
474 | } | |
475 | ||
476 | /* See whether the magic number matches. */ | |
477 | ||
b34976b6 | 478 | static bfd_boolean |
252b5132 | 479 | alpha_ecoff_bad_format_hook (abfd, filehdr) |
b2747490 | 480 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
481 | PTR filehdr; |
482 | { | |
483 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
484 | ||
15ac1d4f NC |
485 | if (! ALPHA_ECOFF_BADMAG (*internal_f)) |
486 | return TRUE; | |
252b5132 | 487 | |
15ac1d4f NC |
488 | if (ALPHA_ECOFF_COMPRESSEDMAG (*internal_f)) |
489 | (*_bfd_error_handler) | |
490 | (_("%B: Cannot handle compressed Alpha binaries.\n" | |
491 | " Use compiler flags, or objZ, to generate uncompressed binaries."), | |
492 | abfd); | |
493 | ||
494 | return FALSE; | |
252b5132 RH |
495 | } |
496 | ||
497 | /* This is a hook called by coff_real_object_p to create any backend | |
498 | specific information. */ | |
499 | ||
500 | static PTR | |
501 | alpha_ecoff_mkobject_hook (abfd, filehdr, aouthdr) | |
502 | bfd *abfd; | |
503 | PTR filehdr; | |
504 | PTR aouthdr; | |
505 | { | |
506 | PTR ecoff; | |
507 | ||
508 | ecoff = _bfd_ecoff_mkobject_hook (abfd, filehdr, aouthdr); | |
509 | ||
510 | if (ecoff != NULL) | |
511 | { | |
512 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
513 | ||
514 | /* Set additional BFD flags according to the object type from the | |
515 | machine specific file header flags. */ | |
516 | switch (internal_f->f_flags & F_ALPHA_OBJECT_TYPE_MASK) | |
517 | { | |
518 | case F_ALPHA_SHARABLE: | |
519 | abfd->flags |= DYNAMIC; | |
520 | break; | |
521 | case F_ALPHA_CALL_SHARED: | |
522 | /* Always executable if using shared libraries as the run time | |
523 | loader might resolve undefined references. */ | |
524 | abfd->flags |= (DYNAMIC | EXEC_P); | |
525 | break; | |
526 | } | |
527 | } | |
528 | return ecoff; | |
529 | } | |
530 | \f | |
531 | /* Reloc handling. */ | |
532 | ||
533 | /* Swap a reloc in. */ | |
534 | ||
535 | static void | |
536 | alpha_ecoff_swap_reloc_in (abfd, ext_ptr, intern) | |
537 | bfd *abfd; | |
538 | PTR ext_ptr; | |
539 | struct internal_reloc *intern; | |
540 | { | |
541 | const RELOC *ext = (RELOC *) ext_ptr; | |
542 | ||
dc810e39 AM |
543 | intern->r_vaddr = H_GET_64 (abfd, ext->r_vaddr); |
544 | intern->r_symndx = H_GET_32 (abfd, ext->r_symndx); | |
252b5132 RH |
545 | |
546 | BFD_ASSERT (bfd_header_little_endian (abfd)); | |
547 | ||
548 | intern->r_type = ((ext->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
549 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
550 | intern->r_extern = (ext->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
551 | intern->r_offset = ((ext->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
552 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
553 | /* Ignored the reserved bits. */ | |
554 | intern->r_size = ((ext->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
555 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
556 | ||
557 | if (intern->r_type == ALPHA_R_LITUSE | |
558 | || intern->r_type == ALPHA_R_GPDISP) | |
559 | { | |
560 | /* Handle the LITUSE and GPDISP relocs specially. Its symndx | |
561 | value is not actually a symbol index, but is instead a | |
562 | special code. We put the code in the r_size field, and | |
563 | clobber the symndx. */ | |
564 | if (intern->r_size != 0) | |
565 | abort (); | |
566 | intern->r_size = intern->r_symndx; | |
567 | intern->r_symndx = RELOC_SECTION_NONE; | |
568 | } | |
569 | else if (intern->r_type == ALPHA_R_IGNORE) | |
570 | { | |
571 | /* The IGNORE reloc generally follows a GPDISP reloc, and is | |
572 | against the .lita section. The section is irrelevant. */ | |
573 | if (! intern->r_extern && | |
574 | intern->r_symndx == RELOC_SECTION_ABS) | |
575 | abort (); | |
576 | if (! intern->r_extern && intern->r_symndx == RELOC_SECTION_LITA) | |
577 | intern->r_symndx = RELOC_SECTION_ABS; | |
578 | } | |
579 | } | |
580 | ||
581 | /* Swap a reloc out. */ | |
582 | ||
583 | static void | |
584 | alpha_ecoff_swap_reloc_out (abfd, intern, dst) | |
585 | bfd *abfd; | |
586 | const struct internal_reloc *intern; | |
587 | PTR dst; | |
588 | { | |
589 | RELOC *ext = (RELOC *) dst; | |
590 | long symndx; | |
591 | unsigned char size; | |
592 | ||
593 | /* Undo the hackery done in swap_reloc_in. */ | |
594 | if (intern->r_type == ALPHA_R_LITUSE | |
595 | || intern->r_type == ALPHA_R_GPDISP) | |
596 | { | |
597 | symndx = intern->r_size; | |
598 | size = 0; | |
599 | } | |
600 | else if (intern->r_type == ALPHA_R_IGNORE | |
601 | && ! intern->r_extern | |
602 | && intern->r_symndx == RELOC_SECTION_ABS) | |
603 | { | |
604 | symndx = RELOC_SECTION_LITA; | |
605 | size = intern->r_size; | |
606 | } | |
607 | else | |
608 | { | |
609 | symndx = intern->r_symndx; | |
610 | size = intern->r_size; | |
611 | } | |
612 | ||
15ac1d4f | 613 | /* XXX FIXME: The maximum symndx value used to be 14 but this |
bfaaa3c2 | 614 | fails with object files produced by DEC's C++ compiler. |
15ac1d4f | 615 | Where does the value 14 (or 15) come from anyway ? */ |
252b5132 | 616 | BFD_ASSERT (intern->r_extern |
15ac1d4f | 617 | || (intern->r_symndx >= 0 && intern->r_symndx <= 15)); |
252b5132 | 618 | |
dc810e39 AM |
619 | H_PUT_64 (abfd, intern->r_vaddr, ext->r_vaddr); |
620 | H_PUT_32 (abfd, symndx, ext->r_symndx); | |
252b5132 RH |
621 | |
622 | BFD_ASSERT (bfd_header_little_endian (abfd)); | |
623 | ||
624 | ext->r_bits[0] = ((intern->r_type << RELOC_BITS0_TYPE_SH_LITTLE) | |
625 | & RELOC_BITS0_TYPE_LITTLE); | |
626 | ext->r_bits[1] = ((intern->r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0) | |
627 | | ((intern->r_offset << RELOC_BITS1_OFFSET_SH_LITTLE) | |
628 | & RELOC_BITS1_OFFSET_LITTLE)); | |
629 | ext->r_bits[2] = 0; | |
630 | ext->r_bits[3] = ((size << RELOC_BITS3_SIZE_SH_LITTLE) | |
631 | & RELOC_BITS3_SIZE_LITTLE); | |
632 | } | |
633 | ||
634 | /* Finish canonicalizing a reloc. Part of this is generic to all | |
635 | ECOFF targets, and that part is in ecoff.c. The rest is done in | |
636 | this backend routine. It must fill in the howto field. */ | |
637 | ||
638 | static void | |
639 | alpha_adjust_reloc_in (abfd, intern, rptr) | |
640 | bfd *abfd; | |
641 | const struct internal_reloc *intern; | |
642 | arelent *rptr; | |
643 | { | |
644 | if (intern->r_type > ALPHA_R_GPVALUE) | |
0adc9281 NC |
645 | { |
646 | (*_bfd_error_handler) | |
647 | (_("%B: unknown/unsupported relocation type %d"), | |
648 | abfd, intern->r_type); | |
649 | bfd_set_error (bfd_error_bad_value); | |
650 | rptr->addend = 0; | |
651 | rptr->howto = NULL; | |
652 | return; | |
653 | } | |
252b5132 RH |
654 | |
655 | switch (intern->r_type) | |
656 | { | |
657 | case ALPHA_R_BRADDR: | |
658 | case ALPHA_R_SREL16: | |
659 | case ALPHA_R_SREL32: | |
660 | case ALPHA_R_SREL64: | |
661 | /* This relocs appear to be fully resolved when they are against | |
662 | internal symbols. Against external symbols, BRADDR at least | |
663 | appears to be resolved against the next instruction. */ | |
664 | if (! intern->r_extern) | |
665 | rptr->addend = 0; | |
666 | else | |
667 | rptr->addend = - (intern->r_vaddr + 4); | |
668 | break; | |
669 | ||
670 | case ALPHA_R_GPREL32: | |
671 | case ALPHA_R_LITERAL: | |
672 | /* Copy the gp value for this object file into the addend, to | |
673 | ensure that we are not confused by the linker. */ | |
674 | if (! intern->r_extern) | |
675 | rptr->addend += ecoff_data (abfd)->gp; | |
676 | break; | |
677 | ||
678 | case ALPHA_R_LITUSE: | |
679 | case ALPHA_R_GPDISP: | |
680 | /* The LITUSE and GPDISP relocs do not use a symbol, or an | |
681 | addend, but they do use a special code. Put this code in the | |
682 | addend field. */ | |
683 | rptr->addend = intern->r_size; | |
684 | break; | |
685 | ||
686 | case ALPHA_R_OP_STORE: | |
687 | /* The STORE reloc needs the size and offset fields. We store | |
688 | them in the addend. */ | |
ca724bf2 | 689 | BFD_ASSERT (intern->r_offset <= 256); |
252b5132 RH |
690 | rptr->addend = (intern->r_offset << 8) + intern->r_size; |
691 | break; | |
692 | ||
693 | case ALPHA_R_OP_PUSH: | |
694 | case ALPHA_R_OP_PSUB: | |
695 | case ALPHA_R_OP_PRSHIFT: | |
696 | /* The PUSH, PSUB and PRSHIFT relocs do not actually use an | |
697 | address. I believe that the address supplied is really an | |
698 | addend. */ | |
699 | rptr->addend = intern->r_vaddr; | |
700 | break; | |
701 | ||
702 | case ALPHA_R_GPVALUE: | |
703 | /* Set the addend field to the new GP value. */ | |
704 | rptr->addend = intern->r_symndx + ecoff_data (abfd)->gp; | |
705 | break; | |
706 | ||
707 | case ALPHA_R_IGNORE: | |
708 | /* If the type is ALPHA_R_IGNORE, make sure this is a reference | |
709 | to the absolute section so that the reloc is ignored. For | |
710 | some reason the address of this reloc type is not adjusted by | |
711 | the section vma. We record the gp value for this object file | |
712 | here, for convenience when doing the GPDISP relocation. */ | |
713 | rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
714 | rptr->address = intern->r_vaddr; | |
715 | rptr->addend = ecoff_data (abfd)->gp; | |
716 | break; | |
717 | ||
718 | default: | |
719 | break; | |
720 | } | |
721 | ||
722 | rptr->howto = &alpha_howto_table[intern->r_type]; | |
723 | } | |
724 | ||
725 | /* When writing out a reloc we need to pull some values back out of | |
726 | the addend field into the reloc. This is roughly the reverse of | |
727 | alpha_adjust_reloc_in, except that there are several changes we do | |
728 | not need to undo. */ | |
729 | ||
730 | static void | |
731 | alpha_adjust_reloc_out (abfd, rel, intern) | |
b2747490 | 732 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
733 | const arelent *rel; |
734 | struct internal_reloc *intern; | |
735 | { | |
736 | switch (intern->r_type) | |
737 | { | |
738 | case ALPHA_R_LITUSE: | |
739 | case ALPHA_R_GPDISP: | |
740 | intern->r_size = rel->addend; | |
741 | break; | |
742 | ||
743 | case ALPHA_R_OP_STORE: | |
744 | intern->r_size = rel->addend & 0xff; | |
745 | intern->r_offset = (rel->addend >> 8) & 0xff; | |
746 | break; | |
747 | ||
748 | case ALPHA_R_OP_PUSH: | |
749 | case ALPHA_R_OP_PSUB: | |
750 | case ALPHA_R_OP_PRSHIFT: | |
751 | intern->r_vaddr = rel->addend; | |
752 | break; | |
753 | ||
754 | case ALPHA_R_IGNORE: | |
755 | intern->r_vaddr = rel->address; | |
756 | break; | |
757 | ||
758 | default: | |
759 | break; | |
760 | } | |
761 | } | |
762 | ||
763 | /* The size of the stack for the relocation evaluator. */ | |
764 | #define RELOC_STACKSIZE (10) | |
765 | ||
766 | /* Alpha ECOFF relocs have a built in expression evaluator as well as | |
767 | other interdependencies. Rather than use a bunch of special | |
768 | functions and global variables, we use a single routine to do all | |
769 | the relocation for a section. I haven't yet worked out how the | |
770 | assembler is going to handle this. */ | |
771 | ||
772 | static bfd_byte * | |
773 | alpha_ecoff_get_relocated_section_contents (abfd, link_info, link_order, | |
1049f94e | 774 | data, relocatable, symbols) |
252b5132 RH |
775 | bfd *abfd; |
776 | struct bfd_link_info *link_info; | |
777 | struct bfd_link_order *link_order; | |
778 | bfd_byte *data; | |
1049f94e | 779 | bfd_boolean relocatable; |
252b5132 RH |
780 | asymbol **symbols; |
781 | { | |
782 | bfd *input_bfd = link_order->u.indirect.section->owner; | |
783 | asection *input_section = link_order->u.indirect.section; | |
784 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); | |
785 | arelent **reloc_vector = NULL; | |
786 | long reloc_count; | |
1049f94e | 787 | bfd *output_bfd = relocatable ? abfd : (bfd *) NULL; |
252b5132 | 788 | bfd_vma gp; |
eea6121a | 789 | bfd_size_type sz; |
b34976b6 | 790 | bfd_boolean gp_undefined; |
252b5132 RH |
791 | bfd_vma stack[RELOC_STACKSIZE]; |
792 | int tos = 0; | |
793 | ||
794 | if (reloc_size < 0) | |
795 | goto error_return; | |
dc810e39 | 796 | reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size); |
252b5132 RH |
797 | if (reloc_vector == NULL && reloc_size != 0) |
798 | goto error_return; | |
799 | ||
eea6121a AM |
800 | sz = input_section->rawsize ? input_section->rawsize : input_section->size; |
801 | if (! bfd_get_section_contents (input_bfd, input_section, data, 0, sz)) | |
252b5132 RH |
802 | goto error_return; |
803 | ||
252b5132 RH |
804 | reloc_count = bfd_canonicalize_reloc (input_bfd, input_section, |
805 | reloc_vector, symbols); | |
806 | if (reloc_count < 0) | |
807 | goto error_return; | |
808 | if (reloc_count == 0) | |
809 | goto successful_return; | |
810 | ||
811 | /* Get the GP value for the output BFD. */ | |
b34976b6 | 812 | gp_undefined = FALSE; |
252b5132 RH |
813 | gp = _bfd_get_gp_value (abfd); |
814 | if (gp == 0) | |
815 | { | |
1049f94e | 816 | if (relocatable) |
252b5132 RH |
817 | { |
818 | asection *sec; | |
819 | bfd_vma lo; | |
820 | ||
821 | /* Make up a value. */ | |
822 | lo = (bfd_vma) -1; | |
823 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
824 | { | |
825 | if (sec->vma < lo | |
826 | && (strcmp (sec->name, ".sbss") == 0 | |
827 | || strcmp (sec->name, ".sdata") == 0 | |
828 | || strcmp (sec->name, ".lit4") == 0 | |
829 | || strcmp (sec->name, ".lit8") == 0 | |
830 | || strcmp (sec->name, ".lita") == 0)) | |
831 | lo = sec->vma; | |
832 | } | |
833 | gp = lo + 0x8000; | |
834 | _bfd_set_gp_value (abfd, gp); | |
835 | } | |
836 | else | |
837 | { | |
838 | struct bfd_link_hash_entry *h; | |
839 | ||
b34976b6 AM |
840 | h = bfd_link_hash_lookup (link_info->hash, "_gp", FALSE, FALSE, |
841 | TRUE); | |
252b5132 RH |
842 | if (h == (struct bfd_link_hash_entry *) NULL |
843 | || h->type != bfd_link_hash_defined) | |
b34976b6 | 844 | gp_undefined = TRUE; |
252b5132 RH |
845 | else |
846 | { | |
847 | gp = (h->u.def.value | |
848 | + h->u.def.section->output_section->vma | |
849 | + h->u.def.section->output_offset); | |
850 | _bfd_set_gp_value (abfd, gp); | |
851 | } | |
852 | } | |
853 | } | |
854 | ||
855 | for (; *reloc_vector != (arelent *) NULL; reloc_vector++) | |
856 | { | |
857 | arelent *rel; | |
858 | bfd_reloc_status_type r; | |
859 | char *err; | |
860 | ||
861 | rel = *reloc_vector; | |
862 | r = bfd_reloc_ok; | |
863 | switch (rel->howto->type) | |
864 | { | |
865 | case ALPHA_R_IGNORE: | |
866 | rel->address += input_section->output_offset; | |
867 | break; | |
868 | ||
869 | case ALPHA_R_REFLONG: | |
870 | case ALPHA_R_REFQUAD: | |
871 | case ALPHA_R_BRADDR: | |
872 | case ALPHA_R_HINT: | |
873 | case ALPHA_R_SREL16: | |
874 | case ALPHA_R_SREL32: | |
875 | case ALPHA_R_SREL64: | |
1049f94e | 876 | if (relocatable |
252b5132 RH |
877 | && ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) |
878 | { | |
879 | rel->address += input_section->output_offset; | |
880 | break; | |
881 | } | |
882 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
883 | output_bfd, &err); | |
884 | break; | |
885 | ||
886 | case ALPHA_R_GPREL32: | |
887 | /* This relocation is used in a switch table. It is a 32 | |
888 | bit offset from the current GP value. We must adjust it | |
889 | by the different between the original GP value and the | |
890 | current GP value. The original GP value is stored in the | |
891 | addend. We adjust the addend and let | |
892 | bfd_perform_relocation finish the job. */ | |
893 | rel->addend -= gp; | |
894 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
895 | output_bfd, &err); | |
896 | if (r == bfd_reloc_ok && gp_undefined) | |
897 | { | |
898 | r = bfd_reloc_dangerous; | |
899 | err = (char *) _("GP relative relocation used when GP not defined"); | |
900 | } | |
901 | break; | |
902 | ||
903 | case ALPHA_R_LITERAL: | |
904 | /* This is a reference to a literal value, generally | |
905 | (always?) in the .lita section. This is a 16 bit GP | |
906 | relative relocation. Sometimes the subsequent reloc is a | |
907 | LITUSE reloc, which indicates how this reloc is used. | |
908 | This sometimes permits rewriting the two instructions | |
909 | referred to by the LITERAL and the LITUSE into different | |
910 | instructions which do not refer to .lita. This can save | |
911 | a memory reference, and permits removing a value from | |
912 | .lita thus saving GP relative space. | |
913 | ||
914 | We do not these optimizations. To do them we would need | |
915 | to arrange to link the .lita section first, so that by | |
916 | the time we got here we would know the final values to | |
917 | use. This would not be particularly difficult, but it is | |
918 | not currently implemented. */ | |
919 | ||
920 | { | |
921 | unsigned long insn; | |
922 | ||
923 | /* I believe that the LITERAL reloc will only apply to a | |
924 | ldq or ldl instruction, so check my assumption. */ | |
925 | insn = bfd_get_32 (input_bfd, data + rel->address); | |
926 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 | |
927 | || ((insn >> 26) & 0x3f) == 0x28); | |
928 | ||
929 | rel->addend -= gp; | |
930 | r = bfd_perform_relocation (input_bfd, rel, data, input_section, | |
931 | output_bfd, &err); | |
932 | if (r == bfd_reloc_ok && gp_undefined) | |
933 | { | |
934 | r = bfd_reloc_dangerous; | |
935 | err = | |
936 | (char *) _("GP relative relocation used when GP not defined"); | |
937 | } | |
938 | } | |
939 | break; | |
940 | ||
941 | case ALPHA_R_LITUSE: | |
942 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
943 | does not cause anything to happen, itself. */ | |
944 | rel->address += input_section->output_offset; | |
945 | break; | |
346ceb11 | 946 | |
252b5132 RH |
947 | case ALPHA_R_GPDISP: |
948 | /* This marks the ldah of an ldah/lda pair which loads the | |
949 | gp register with the difference of the gp value and the | |
950 | current location. The second of the pair is r_size bytes | |
951 | ahead; it used to be marked with an ALPHA_R_IGNORE reloc, | |
952 | but that no longer happens in OSF/1 3.2. */ | |
953 | { | |
954 | unsigned long insn1, insn2; | |
955 | bfd_vma addend; | |
956 | ||
957 | /* Get the two instructions. */ | |
958 | insn1 = bfd_get_32 (input_bfd, data + rel->address); | |
959 | insn2 = bfd_get_32 (input_bfd, data + rel->address + rel->addend); | |
960 | ||
961 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
962 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
963 | ||
964 | /* Get the existing addend. We must account for the sign | |
965 | extension done by lda and ldah. */ | |
966 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
967 | if (insn1 & 0x8000) | |
968 | { | |
969 | addend -= 0x80000000; | |
970 | addend -= 0x80000000; | |
971 | } | |
972 | if (insn2 & 0x8000) | |
973 | addend -= 0x10000; | |
974 | ||
975 | /* The existing addend includes the different between the | |
976 | gp of the input BFD and the address in the input BFD. | |
977 | Subtract this out. */ | |
978 | addend -= (ecoff_data (input_bfd)->gp | |
979 | - (input_section->vma + rel->address)); | |
980 | ||
981 | /* Now add in the final gp value, and subtract out the | |
982 | final address. */ | |
983 | addend += (gp | |
984 | - (input_section->output_section->vma | |
985 | + input_section->output_offset | |
986 | + rel->address)); | |
987 | ||
988 | /* Change the instructions, accounting for the sign | |
989 | extension, and write them out. */ | |
990 | if (addend & 0x8000) | |
991 | addend += 0x10000; | |
992 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
993 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
994 | ||
995 | bfd_put_32 (input_bfd, (bfd_vma) insn1, data + rel->address); | |
996 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
997 | data + rel->address + rel->addend); | |
998 | ||
999 | rel->address += input_section->output_offset; | |
1000 | } | |
1001 | break; | |
346ceb11 | 1002 | |
252b5132 RH |
1003 | case ALPHA_R_OP_PUSH: |
1004 | /* Push a value on the reloc evaluation stack. */ | |
1005 | { | |
1006 | asymbol *symbol; | |
1007 | bfd_vma relocation; | |
1008 | ||
1049f94e | 1009 | if (relocatable) |
252b5132 RH |
1010 | { |
1011 | rel->address += input_section->output_offset; | |
1012 | break; | |
1013 | } | |
1014 | ||
1015 | /* Figure out the relocation of this symbol. */ | |
1016 | symbol = *rel->sym_ptr_ptr; | |
1017 | ||
1018 | if (bfd_is_und_section (symbol->section)) | |
1019 | r = bfd_reloc_undefined; | |
1020 | ||
1021 | if (bfd_is_com_section (symbol->section)) | |
1022 | relocation = 0; | |
1023 | else | |
1024 | relocation = symbol->value; | |
1025 | relocation += symbol->section->output_section->vma; | |
1026 | relocation += symbol->section->output_offset; | |
1027 | relocation += rel->addend; | |
1028 | ||
1029 | if (tos >= RELOC_STACKSIZE) | |
1030 | abort (); | |
1031 | ||
1032 | stack[tos++] = relocation; | |
1033 | } | |
1034 | break; | |
1035 | ||
1036 | case ALPHA_R_OP_STORE: | |
1037 | /* Store a value from the reloc stack into a bitfield. */ | |
1038 | { | |
1039 | bfd_vma val; | |
1040 | int offset, size; | |
1041 | ||
1049f94e | 1042 | if (relocatable) |
252b5132 RH |
1043 | { |
1044 | rel->address += input_section->output_offset; | |
1045 | break; | |
1046 | } | |
1047 | ||
1048 | if (tos == 0) | |
1049 | abort (); | |
1050 | ||
1051 | /* The offset and size for this reloc are encoded into the | |
1052 | addend field by alpha_adjust_reloc_in. */ | |
1053 | offset = (rel->addend >> 8) & 0xff; | |
1054 | size = rel->addend & 0xff; | |
1055 | ||
1056 | val = bfd_get_64 (abfd, data + rel->address); | |
1057 | val &=~ (((1 << size) - 1) << offset); | |
1058 | val |= (stack[--tos] & ((1 << size) - 1)) << offset; | |
1059 | bfd_put_64 (abfd, val, data + rel->address); | |
1060 | } | |
1061 | break; | |
1062 | ||
1063 | case ALPHA_R_OP_PSUB: | |
1064 | /* Subtract a value from the top of the stack. */ | |
1065 | { | |
1066 | asymbol *symbol; | |
1067 | bfd_vma relocation; | |
1068 | ||
1049f94e | 1069 | if (relocatable) |
252b5132 RH |
1070 | { |
1071 | rel->address += input_section->output_offset; | |
1072 | break; | |
1073 | } | |
1074 | ||
1075 | /* Figure out the relocation of this symbol. */ | |
1076 | symbol = *rel->sym_ptr_ptr; | |
1077 | ||
1078 | if (bfd_is_und_section (symbol->section)) | |
1079 | r = bfd_reloc_undefined; | |
1080 | ||
1081 | if (bfd_is_com_section (symbol->section)) | |
1082 | relocation = 0; | |
1083 | else | |
1084 | relocation = symbol->value; | |
1085 | relocation += symbol->section->output_section->vma; | |
1086 | relocation += symbol->section->output_offset; | |
1087 | relocation += rel->addend; | |
1088 | ||
1089 | if (tos == 0) | |
1090 | abort (); | |
1091 | ||
1092 | stack[tos - 1] -= relocation; | |
1093 | } | |
1094 | break; | |
1095 | ||
1096 | case ALPHA_R_OP_PRSHIFT: | |
1097 | /* Shift the value on the top of the stack. */ | |
1098 | { | |
1099 | asymbol *symbol; | |
1100 | bfd_vma relocation; | |
1101 | ||
1049f94e | 1102 | if (relocatable) |
252b5132 RH |
1103 | { |
1104 | rel->address += input_section->output_offset; | |
1105 | break; | |
1106 | } | |
1107 | ||
1108 | /* Figure out the relocation of this symbol. */ | |
1109 | symbol = *rel->sym_ptr_ptr; | |
1110 | ||
1111 | if (bfd_is_und_section (symbol->section)) | |
1112 | r = bfd_reloc_undefined; | |
1113 | ||
1114 | if (bfd_is_com_section (symbol->section)) | |
1115 | relocation = 0; | |
1116 | else | |
1117 | relocation = symbol->value; | |
1118 | relocation += symbol->section->output_section->vma; | |
1119 | relocation += symbol->section->output_offset; | |
1120 | relocation += rel->addend; | |
1121 | ||
1122 | if (tos == 0) | |
1123 | abort (); | |
1124 | ||
1125 | stack[tos - 1] >>= relocation; | |
1126 | } | |
1127 | break; | |
346ceb11 | 1128 | |
252b5132 RH |
1129 | case ALPHA_R_GPVALUE: |
1130 | /* I really don't know if this does the right thing. */ | |
1131 | gp = rel->addend; | |
b34976b6 | 1132 | gp_undefined = FALSE; |
252b5132 RH |
1133 | break; |
1134 | ||
1135 | default: | |
1136 | abort (); | |
1137 | } | |
1138 | ||
1049f94e | 1139 | if (relocatable) |
252b5132 RH |
1140 | { |
1141 | asection *os = input_section->output_section; | |
1142 | ||
1143 | /* A partial link, so keep the relocs. */ | |
1144 | os->orelocation[os->reloc_count] = rel; | |
1145 | os->reloc_count++; | |
1146 | } | |
1147 | ||
346ceb11 | 1148 | if (r != bfd_reloc_ok) |
252b5132 RH |
1149 | { |
1150 | switch (r) | |
1151 | { | |
1152 | case bfd_reloc_undefined: | |
1153 | if (! ((*link_info->callbacks->undefined_symbol) | |
1154 | (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr), | |
b34976b6 | 1155 | input_bfd, input_section, rel->address, TRUE))) |
252b5132 RH |
1156 | goto error_return; |
1157 | break; | |
346ceb11 | 1158 | case bfd_reloc_dangerous: |
252b5132 RH |
1159 | if (! ((*link_info->callbacks->reloc_dangerous) |
1160 | (link_info, err, input_bfd, input_section, | |
1161 | rel->address))) | |
1162 | goto error_return; | |
1163 | break; | |
1164 | case bfd_reloc_overflow: | |
1165 | if (! ((*link_info->callbacks->reloc_overflow) | |
dfeffb9f L |
1166 | (link_info, NULL, |
1167 | bfd_asymbol_name (*rel->sym_ptr_ptr), | |
252b5132 RH |
1168 | rel->howto->name, rel->addend, input_bfd, |
1169 | input_section, rel->address))) | |
1170 | goto error_return; | |
1171 | break; | |
1172 | case bfd_reloc_outofrange: | |
1173 | default: | |
1174 | abort (); | |
1175 | break; | |
1176 | } | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | if (tos != 0) | |
1181 | abort (); | |
1182 | ||
1183 | successful_return: | |
1184 | if (reloc_vector != NULL) | |
1185 | free (reloc_vector); | |
1186 | return data; | |
1187 | ||
1188 | error_return: | |
1189 | if (reloc_vector != NULL) | |
1190 | free (reloc_vector); | |
1191 | return NULL; | |
1192 | } | |
1193 | ||
1194 | /* Get the howto structure for a generic reloc type. */ | |
1195 | ||
1196 | static reloc_howto_type * | |
1197 | alpha_bfd_reloc_type_lookup (abfd, code) | |
b2747490 | 1198 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1199 | bfd_reloc_code_real_type code; |
1200 | { | |
1201 | int alpha_type; | |
1202 | ||
1203 | switch (code) | |
1204 | { | |
1205 | case BFD_RELOC_32: | |
1206 | alpha_type = ALPHA_R_REFLONG; | |
1207 | break; | |
1208 | case BFD_RELOC_64: | |
1209 | case BFD_RELOC_CTOR: | |
1210 | alpha_type = ALPHA_R_REFQUAD; | |
1211 | break; | |
1212 | case BFD_RELOC_GPREL32: | |
1213 | alpha_type = ALPHA_R_GPREL32; | |
1214 | break; | |
1215 | case BFD_RELOC_ALPHA_LITERAL: | |
1216 | alpha_type = ALPHA_R_LITERAL; | |
1217 | break; | |
1218 | case BFD_RELOC_ALPHA_LITUSE: | |
1219 | alpha_type = ALPHA_R_LITUSE; | |
1220 | break; | |
1221 | case BFD_RELOC_ALPHA_GPDISP_HI16: | |
1222 | alpha_type = ALPHA_R_GPDISP; | |
1223 | break; | |
1224 | case BFD_RELOC_ALPHA_GPDISP_LO16: | |
1225 | alpha_type = ALPHA_R_IGNORE; | |
1226 | break; | |
1227 | case BFD_RELOC_23_PCREL_S2: | |
1228 | alpha_type = ALPHA_R_BRADDR; | |
1229 | break; | |
1230 | case BFD_RELOC_ALPHA_HINT: | |
1231 | alpha_type = ALPHA_R_HINT; | |
1232 | break; | |
1233 | case BFD_RELOC_16_PCREL: | |
1234 | alpha_type = ALPHA_R_SREL16; | |
1235 | break; | |
1236 | case BFD_RELOC_32_PCREL: | |
1237 | alpha_type = ALPHA_R_SREL32; | |
1238 | break; | |
1239 | case BFD_RELOC_64_PCREL: | |
1240 | alpha_type = ALPHA_R_SREL64; | |
1241 | break; | |
252b5132 RH |
1242 | default: |
1243 | return (reloc_howto_type *) NULL; | |
1244 | } | |
1245 | ||
1246 | return &alpha_howto_table[alpha_type]; | |
1247 | } | |
157090f7 AM |
1248 | |
1249 | static reloc_howto_type * | |
1250 | alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
1251 | const char *r_name) | |
1252 | { | |
1253 | unsigned int i; | |
1254 | ||
1255 | for (i = 0; | |
1256 | i < sizeof (alpha_howto_table) / sizeof (alpha_howto_table[0]); | |
1257 | i++) | |
1258 | if (alpha_howto_table[i].name != NULL | |
1259 | && strcasecmp (alpha_howto_table[i].name, r_name) == 0) | |
1260 | return &alpha_howto_table[i]; | |
1261 | ||
1262 | return NULL; | |
1263 | } | |
252b5132 RH |
1264 | \f |
1265 | /* A helper routine for alpha_relocate_section which converts an | |
1049f94e | 1266 | external reloc when generating relocatable output. Returns the |
252b5132 RH |
1267 | relocation amount. */ |
1268 | ||
1269 | static bfd_vma | |
1270 | alpha_convert_external_reloc (output_bfd, info, input_bfd, ext_rel, h) | |
b2747490 | 1271 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1272 | struct bfd_link_info *info; |
1273 | bfd *input_bfd; | |
1274 | struct external_reloc *ext_rel; | |
1275 | struct ecoff_link_hash_entry *h; | |
1276 | { | |
1277 | unsigned long r_symndx; | |
1278 | bfd_vma relocation; | |
1279 | ||
1049f94e | 1280 | BFD_ASSERT (info->relocatable); |
252b5132 RH |
1281 | |
1282 | if (h->root.type == bfd_link_hash_defined | |
1283 | || h->root.type == bfd_link_hash_defweak) | |
1284 | { | |
1285 | asection *hsec; | |
1286 | const char *name; | |
1287 | ||
1288 | /* This symbol is defined in the output. Convert the reloc from | |
1289 | being against the symbol to being against the section. */ | |
1290 | ||
1291 | /* Clear the r_extern bit. */ | |
1292 | ext_rel->r_bits[1] &=~ RELOC_BITS1_EXTERN_LITTLE; | |
1293 | ||
1294 | /* Compute a new r_symndx value. */ | |
1295 | hsec = h->root.u.def.section; | |
1296 | name = bfd_get_section_name (output_bfd, hsec->output_section); | |
1297 | ||
dc810e39 | 1298 | r_symndx = (unsigned long) -1; |
252b5132 RH |
1299 | switch (name[1]) |
1300 | { | |
1301 | case 'A': | |
1302 | if (strcmp (name, "*ABS*") == 0) | |
1303 | r_symndx = RELOC_SECTION_ABS; | |
1304 | break; | |
1305 | case 'b': | |
1306 | if (strcmp (name, ".bss") == 0) | |
1307 | r_symndx = RELOC_SECTION_BSS; | |
1308 | break; | |
1309 | case 'd': | |
1310 | if (strcmp (name, ".data") == 0) | |
1311 | r_symndx = RELOC_SECTION_DATA; | |
1312 | break; | |
1313 | case 'f': | |
1314 | if (strcmp (name, ".fini") == 0) | |
1315 | r_symndx = RELOC_SECTION_FINI; | |
1316 | break; | |
1317 | case 'i': | |
1318 | if (strcmp (name, ".init") == 0) | |
1319 | r_symndx = RELOC_SECTION_INIT; | |
1320 | break; | |
1321 | case 'l': | |
1322 | if (strcmp (name, ".lita") == 0) | |
1323 | r_symndx = RELOC_SECTION_LITA; | |
1324 | else if (strcmp (name, ".lit8") == 0) | |
1325 | r_symndx = RELOC_SECTION_LIT8; | |
1326 | else if (strcmp (name, ".lit4") == 0) | |
1327 | r_symndx = RELOC_SECTION_LIT4; | |
1328 | break; | |
1329 | case 'p': | |
1330 | if (strcmp (name, ".pdata") == 0) | |
1331 | r_symndx = RELOC_SECTION_PDATA; | |
1332 | break; | |
1333 | case 'r': | |
1334 | if (strcmp (name, ".rdata") == 0) | |
1335 | r_symndx = RELOC_SECTION_RDATA; | |
1336 | else if (strcmp (name, ".rconst") == 0) | |
1337 | r_symndx = RELOC_SECTION_RCONST; | |
1338 | break; | |
1339 | case 's': | |
1340 | if (strcmp (name, ".sdata") == 0) | |
1341 | r_symndx = RELOC_SECTION_SDATA; | |
1342 | else if (strcmp (name, ".sbss") == 0) | |
1343 | r_symndx = RELOC_SECTION_SBSS; | |
1344 | break; | |
1345 | case 't': | |
1346 | if (strcmp (name, ".text") == 0) | |
1347 | r_symndx = RELOC_SECTION_TEXT; | |
1348 | break; | |
1349 | case 'x': | |
1350 | if (strcmp (name, ".xdata") == 0) | |
1351 | r_symndx = RELOC_SECTION_XDATA; | |
1352 | break; | |
1353 | } | |
346ceb11 | 1354 | |
cea4409c | 1355 | if (r_symndx == (unsigned long) -1) |
252b5132 RH |
1356 | abort (); |
1357 | ||
1358 | /* Add the section VMA and the symbol value. */ | |
1359 | relocation = (h->root.u.def.value | |
1360 | + hsec->output_section->vma | |
1361 | + hsec->output_offset); | |
1362 | } | |
1363 | else | |
1364 | { | |
1365 | /* Change the symndx value to the right one for | |
1366 | the output BFD. */ | |
1367 | r_symndx = h->indx; | |
cea4409c | 1368 | if (r_symndx == (unsigned long) -1) |
252b5132 RH |
1369 | { |
1370 | /* Caller must give an error. */ | |
1371 | r_symndx = 0; | |
1372 | } | |
1373 | relocation = 0; | |
1374 | } | |
1375 | ||
1376 | /* Write out the new r_symndx value. */ | |
dc810e39 | 1377 | H_PUT_32 (input_bfd, r_symndx, ext_rel->r_symndx); |
252b5132 RH |
1378 | |
1379 | return relocation; | |
1380 | } | |
1381 | ||
1382 | /* Relocate a section while linking an Alpha ECOFF file. This is | |
1383 | quite similar to get_relocated_section_contents. Perhaps they | |
1384 | could be combined somehow. */ | |
1385 | ||
b34976b6 | 1386 | static bfd_boolean |
252b5132 RH |
1387 | alpha_relocate_section (output_bfd, info, input_bfd, input_section, |
1388 | contents, external_relocs) | |
1389 | bfd *output_bfd; | |
1390 | struct bfd_link_info *info; | |
1391 | bfd *input_bfd; | |
1392 | asection *input_section; | |
1393 | bfd_byte *contents; | |
1394 | PTR external_relocs; | |
1395 | { | |
1396 | asection **symndx_to_section, *lita_sec; | |
1397 | struct ecoff_link_hash_entry **sym_hashes; | |
1398 | bfd_vma gp; | |
b34976b6 | 1399 | bfd_boolean gp_undefined; |
252b5132 RH |
1400 | bfd_vma stack[RELOC_STACKSIZE]; |
1401 | int tos = 0; | |
1402 | struct external_reloc *ext_rel; | |
1403 | struct external_reloc *ext_rel_end; | |
dc810e39 | 1404 | bfd_size_type amt; |
252b5132 RH |
1405 | |
1406 | /* We keep a table mapping the symndx found in an internal reloc to | |
1407 | the appropriate section. This is faster than looking up the | |
1408 | section by name each time. */ | |
1409 | symndx_to_section = ecoff_data (input_bfd)->symndx_to_section; | |
1410 | if (symndx_to_section == (asection **) NULL) | |
1411 | { | |
dc810e39 AM |
1412 | amt = NUM_RELOC_SECTIONS * sizeof (asection *); |
1413 | symndx_to_section = (asection **) bfd_alloc (input_bfd, amt); | |
252b5132 | 1414 | if (!symndx_to_section) |
b34976b6 | 1415 | return FALSE; |
252b5132 RH |
1416 | |
1417 | symndx_to_section[RELOC_SECTION_NONE] = NULL; | |
1418 | symndx_to_section[RELOC_SECTION_TEXT] = | |
1419 | bfd_get_section_by_name (input_bfd, ".text"); | |
1420 | symndx_to_section[RELOC_SECTION_RDATA] = | |
1421 | bfd_get_section_by_name (input_bfd, ".rdata"); | |
1422 | symndx_to_section[RELOC_SECTION_DATA] = | |
1423 | bfd_get_section_by_name (input_bfd, ".data"); | |
1424 | symndx_to_section[RELOC_SECTION_SDATA] = | |
1425 | bfd_get_section_by_name (input_bfd, ".sdata"); | |
1426 | symndx_to_section[RELOC_SECTION_SBSS] = | |
1427 | bfd_get_section_by_name (input_bfd, ".sbss"); | |
1428 | symndx_to_section[RELOC_SECTION_BSS] = | |
1429 | bfd_get_section_by_name (input_bfd, ".bss"); | |
1430 | symndx_to_section[RELOC_SECTION_INIT] = | |
1431 | bfd_get_section_by_name (input_bfd, ".init"); | |
1432 | symndx_to_section[RELOC_SECTION_LIT8] = | |
1433 | bfd_get_section_by_name (input_bfd, ".lit8"); | |
1434 | symndx_to_section[RELOC_SECTION_LIT4] = | |
1435 | bfd_get_section_by_name (input_bfd, ".lit4"); | |
1436 | symndx_to_section[RELOC_SECTION_XDATA] = | |
1437 | bfd_get_section_by_name (input_bfd, ".xdata"); | |
1438 | symndx_to_section[RELOC_SECTION_PDATA] = | |
1439 | bfd_get_section_by_name (input_bfd, ".pdata"); | |
1440 | symndx_to_section[RELOC_SECTION_FINI] = | |
1441 | bfd_get_section_by_name (input_bfd, ".fini"); | |
1442 | symndx_to_section[RELOC_SECTION_LITA] = | |
1443 | bfd_get_section_by_name (input_bfd, ".lita"); | |
1444 | symndx_to_section[RELOC_SECTION_ABS] = bfd_abs_section_ptr; | |
1445 | symndx_to_section[RELOC_SECTION_RCONST] = | |
1446 | bfd_get_section_by_name (input_bfd, ".rconst"); | |
1447 | ||
1448 | ecoff_data (input_bfd)->symndx_to_section = symndx_to_section; | |
1449 | } | |
1450 | ||
1451 | sym_hashes = ecoff_data (input_bfd)->sym_hashes; | |
1452 | ||
1453 | /* On the Alpha, the .lita section must be addressable by the global | |
1454 | pointer. To support large programs, we need to allow multiple | |
1455 | global pointers. This works as long as each input .lita section | |
1456 | is <64KB big. This implies that when producing relocatable | |
346ceb11 | 1457 | output, the .lita section is limited to 64KB. . */ |
252b5132 RH |
1458 | |
1459 | lita_sec = symndx_to_section[RELOC_SECTION_LITA]; | |
1460 | gp = _bfd_get_gp_value (output_bfd); | |
1049f94e | 1461 | if (! info->relocatable && lita_sec != NULL) |
252b5132 RH |
1462 | { |
1463 | struct ecoff_section_tdata *lita_sec_data; | |
1464 | ||
1465 | /* Make sure we have a section data structure to which we can | |
1466 | hang on to the gp value we pick for the section. */ | |
1467 | lita_sec_data = ecoff_section_data (input_bfd, lita_sec); | |
1468 | if (lita_sec_data == NULL) | |
1469 | { | |
dc810e39 | 1470 | amt = sizeof (struct ecoff_section_tdata); |
252b5132 | 1471 | lita_sec_data = ((struct ecoff_section_tdata *) |
dc810e39 | 1472 | bfd_zalloc (input_bfd, amt)); |
e9edc808 | 1473 | lita_sec->used_by_bfd = lita_sec_data; |
252b5132 RH |
1474 | } |
1475 | ||
1476 | if (lita_sec_data->gp != 0) | |
1477 | { | |
1478 | /* If we already assigned a gp to this section, we better | |
1479 | stick with that value. */ | |
1480 | gp = lita_sec_data->gp; | |
1481 | } | |
1482 | else | |
1483 | { | |
1484 | bfd_vma lita_vma; | |
1485 | bfd_size_type lita_size; | |
1486 | ||
1487 | lita_vma = lita_sec->output_offset + lita_sec->output_section->vma; | |
eea6121a | 1488 | lita_size = lita_sec->size; |
252b5132 RH |
1489 | |
1490 | if (gp == 0 | |
1491 | || lita_vma < gp - 0x8000 | |
1492 | || lita_vma + lita_size >= gp + 0x8000) | |
1493 | { | |
1494 | /* Either gp hasn't been set at all or the current gp | |
1495 | cannot address this .lita section. In both cases we | |
1496 | reset the gp to point into the "middle" of the | |
1497 | current input .lita section. */ | |
1498 | if (gp && !ecoff_data (output_bfd)->issued_multiple_gp_warning) | |
1499 | { | |
1500 | (*info->callbacks->warning) (info, | |
1501 | _("using multiple gp values"), | |
1502 | (char *) NULL, output_bfd, | |
1503 | (asection *) NULL, (bfd_vma) 0); | |
b34976b6 | 1504 | ecoff_data (output_bfd)->issued_multiple_gp_warning = TRUE; |
252b5132 RH |
1505 | } |
1506 | if (lita_vma < gp - 0x8000) | |
1507 | gp = lita_vma + lita_size - 0x8000; | |
1508 | else | |
1509 | gp = lita_vma + 0x8000; | |
1510 | ||
1511 | } | |
1512 | ||
1513 | lita_sec_data->gp = gp; | |
1514 | } | |
1515 | ||
1516 | _bfd_set_gp_value (output_bfd, gp); | |
1517 | } | |
1518 | ||
1519 | gp_undefined = (gp == 0); | |
1520 | ||
1521 | BFD_ASSERT (bfd_header_little_endian (output_bfd)); | |
1522 | BFD_ASSERT (bfd_header_little_endian (input_bfd)); | |
1523 | ||
1524 | ext_rel = (struct external_reloc *) external_relocs; | |
1525 | ext_rel_end = ext_rel + input_section->reloc_count; | |
1526 | for (; ext_rel < ext_rel_end; ext_rel++) | |
1527 | { | |
1528 | bfd_vma r_vaddr; | |
1529 | unsigned long r_symndx; | |
1530 | int r_type; | |
1531 | int r_extern; | |
1532 | int r_offset; | |
1533 | int r_size; | |
b34976b6 AM |
1534 | bfd_boolean relocatep; |
1535 | bfd_boolean adjust_addrp; | |
1536 | bfd_boolean gp_usedp; | |
252b5132 RH |
1537 | bfd_vma addend; |
1538 | ||
dc810e39 AM |
1539 | r_vaddr = H_GET_64 (input_bfd, ext_rel->r_vaddr); |
1540 | r_symndx = H_GET_32 (input_bfd, ext_rel->r_symndx); | |
252b5132 RH |
1541 | |
1542 | r_type = ((ext_rel->r_bits[0] & RELOC_BITS0_TYPE_LITTLE) | |
1543 | >> RELOC_BITS0_TYPE_SH_LITTLE); | |
1544 | r_extern = (ext_rel->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; | |
1545 | r_offset = ((ext_rel->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) | |
1546 | >> RELOC_BITS1_OFFSET_SH_LITTLE); | |
1547 | /* Ignored the reserved bits. */ | |
1548 | r_size = ((ext_rel->r_bits[3] & RELOC_BITS3_SIZE_LITTLE) | |
1549 | >> RELOC_BITS3_SIZE_SH_LITTLE); | |
1550 | ||
b34976b6 AM |
1551 | relocatep = FALSE; |
1552 | adjust_addrp = TRUE; | |
1553 | gp_usedp = FALSE; | |
252b5132 RH |
1554 | addend = 0; |
1555 | ||
1556 | switch (r_type) | |
1557 | { | |
0adc9281 NC |
1558 | case ALPHA_R_GPRELHIGH: |
1559 | (*_bfd_error_handler) | |
1560 | (_("%B: unsupported relocation: ALPHA_R_GPRELHIGH"), | |
1561 | input_bfd); | |
1562 | bfd_set_error (bfd_error_bad_value); | |
1563 | continue; | |
1564 | ||
1565 | case ALPHA_R_GPRELLOW: | |
1566 | (*_bfd_error_handler) | |
1567 | (_("%B: unsupported relocation: ALPHA_R_GPRELLOW"), | |
1568 | input_bfd); | |
1569 | bfd_set_error (bfd_error_bad_value); | |
1570 | continue; | |
1571 | ||
252b5132 | 1572 | default: |
0adc9281 NC |
1573 | (*_bfd_error_handler) |
1574 | (_("%B: unknown relocation type %d"), | |
1575 | input_bfd, (int) r_type); | |
1576 | bfd_set_error (bfd_error_bad_value); | |
1577 | continue; | |
252b5132 RH |
1578 | |
1579 | case ALPHA_R_IGNORE: | |
1580 | /* This reloc appears after a GPDISP reloc. On earlier | |
1581 | versions of OSF/1, It marked the position of the second | |
1582 | instruction to be altered by the GPDISP reloc, but it is | |
1583 | not otherwise used for anything. For some reason, the | |
1584 | address of the relocation does not appear to include the | |
1585 | section VMA, unlike the other relocation types. */ | |
1049f94e | 1586 | if (info->relocatable) |
dc810e39 AM |
1587 | H_PUT_64 (input_bfd, input_section->output_offset + r_vaddr, |
1588 | ext_rel->r_vaddr); | |
b34976b6 | 1589 | adjust_addrp = FALSE; |
252b5132 RH |
1590 | break; |
1591 | ||
1592 | case ALPHA_R_REFLONG: | |
1593 | case ALPHA_R_REFQUAD: | |
1594 | case ALPHA_R_HINT: | |
b34976b6 | 1595 | relocatep = TRUE; |
252b5132 RH |
1596 | break; |
1597 | ||
1598 | case ALPHA_R_BRADDR: | |
1599 | case ALPHA_R_SREL16: | |
1600 | case ALPHA_R_SREL32: | |
1601 | case ALPHA_R_SREL64: | |
1602 | if (r_extern) | |
1603 | addend += - (r_vaddr + 4); | |
b34976b6 | 1604 | relocatep = TRUE; |
252b5132 RH |
1605 | break; |
1606 | ||
1607 | case ALPHA_R_GPREL32: | |
1608 | /* This relocation is used in a switch table. It is a 32 | |
1609 | bit offset from the current GP value. We must adjust it | |
1610 | by the different between the original GP value and the | |
1611 | current GP value. */ | |
b34976b6 | 1612 | relocatep = TRUE; |
252b5132 | 1613 | addend = ecoff_data (input_bfd)->gp - gp; |
b34976b6 | 1614 | gp_usedp = TRUE; |
252b5132 RH |
1615 | break; |
1616 | ||
1617 | case ALPHA_R_LITERAL: | |
1618 | /* This is a reference to a literal value, generally | |
1619 | (always?) in the .lita section. This is a 16 bit GP | |
1620 | relative relocation. Sometimes the subsequent reloc is a | |
1621 | LITUSE reloc, which indicates how this reloc is used. | |
1622 | This sometimes permits rewriting the two instructions | |
1623 | referred to by the LITERAL and the LITUSE into different | |
1624 | instructions which do not refer to .lita. This can save | |
1625 | a memory reference, and permits removing a value from | |
1626 | .lita thus saving GP relative space. | |
1627 | ||
1628 | We do not these optimizations. To do them we would need | |
1629 | to arrange to link the .lita section first, so that by | |
1630 | the time we got here we would know the final values to | |
1631 | use. This would not be particularly difficult, but it is | |
1632 | not currently implemented. */ | |
1633 | ||
1634 | /* I believe that the LITERAL reloc will only apply to a ldq | |
1635 | or ldl instruction, so check my assumption. */ | |
1636 | { | |
1637 | unsigned long insn; | |
1638 | ||
1639 | insn = bfd_get_32 (input_bfd, | |
1640 | contents + r_vaddr - input_section->vma); | |
1641 | BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29 | |
1642 | || ((insn >> 26) & 0x3f) == 0x28); | |
1643 | } | |
1644 | ||
b34976b6 | 1645 | relocatep = TRUE; |
252b5132 | 1646 | addend = ecoff_data (input_bfd)->gp - gp; |
b34976b6 | 1647 | gp_usedp = TRUE; |
252b5132 RH |
1648 | break; |
1649 | ||
1650 | case ALPHA_R_LITUSE: | |
1651 | /* See ALPHA_R_LITERAL above for the uses of this reloc. It | |
1652 | does not cause anything to happen, itself. */ | |
1653 | break; | |
346ceb11 | 1654 | |
252b5132 RH |
1655 | case ALPHA_R_GPDISP: |
1656 | /* This marks the ldah of an ldah/lda pair which loads the | |
1657 | gp register with the difference of the gp value and the | |
1658 | current location. The second of the pair is r_symndx | |
1659 | bytes ahead. It used to be marked with an ALPHA_R_IGNORE | |
1660 | reloc, but OSF/1 3.2 no longer does that. */ | |
1661 | { | |
1662 | unsigned long insn1, insn2; | |
1663 | ||
1664 | /* Get the two instructions. */ | |
1665 | insn1 = bfd_get_32 (input_bfd, | |
1666 | contents + r_vaddr - input_section->vma); | |
1667 | insn2 = bfd_get_32 (input_bfd, | |
1668 | (contents | |
1669 | + r_vaddr | |
1670 | - input_section->vma | |
1671 | + r_symndx)); | |
1672 | ||
1673 | BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */ | |
1674 | BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */ | |
1675 | ||
1676 | /* Get the existing addend. We must account for the sign | |
1677 | extension done by lda and ldah. */ | |
1678 | addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff); | |
1679 | if (insn1 & 0x8000) | |
1680 | { | |
1681 | /* This is addend -= 0x100000000 without causing an | |
1682 | integer overflow on a 32 bit host. */ | |
1683 | addend -= 0x80000000; | |
1684 | addend -= 0x80000000; | |
1685 | } | |
1686 | if (insn2 & 0x8000) | |
1687 | addend -= 0x10000; | |
1688 | ||
1689 | /* The existing addend includes the difference between the | |
1690 | gp of the input BFD and the address in the input BFD. | |
1691 | We want to change this to the difference between the | |
1692 | final GP and the final address. */ | |
1693 | addend += (gp | |
1694 | - ecoff_data (input_bfd)->gp | |
1695 | + input_section->vma | |
1696 | - (input_section->output_section->vma | |
1697 | + input_section->output_offset)); | |
1698 | ||
1699 | /* Change the instructions, accounting for the sign | |
1700 | extension, and write them out. */ | |
1701 | if (addend & 0x8000) | |
1702 | addend += 0x10000; | |
1703 | insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff); | |
1704 | insn2 = (insn2 & 0xffff0000) | (addend & 0xffff); | |
1705 | ||
1706 | bfd_put_32 (input_bfd, (bfd_vma) insn1, | |
1707 | contents + r_vaddr - input_section->vma); | |
1708 | bfd_put_32 (input_bfd, (bfd_vma) insn2, | |
1709 | contents + r_vaddr - input_section->vma + r_symndx); | |
1710 | ||
b34976b6 | 1711 | gp_usedp = TRUE; |
252b5132 RH |
1712 | } |
1713 | break; | |
346ceb11 | 1714 | |
252b5132 RH |
1715 | case ALPHA_R_OP_PUSH: |
1716 | case ALPHA_R_OP_PSUB: | |
1717 | case ALPHA_R_OP_PRSHIFT: | |
1718 | /* Manipulate values on the reloc evaluation stack. The | |
1719 | r_vaddr field is not an address in input_section, it is | |
1720 | the current value (including any addend) of the object | |
1721 | being used. */ | |
1722 | if (! r_extern) | |
1723 | { | |
1724 | asection *s; | |
1725 | ||
1726 | s = symndx_to_section[r_symndx]; | |
1727 | if (s == (asection *) NULL) | |
1728 | abort (); | |
1729 | addend = s->output_section->vma + s->output_offset - s->vma; | |
1730 | } | |
1731 | else | |
1732 | { | |
1733 | struct ecoff_link_hash_entry *h; | |
1734 | ||
1735 | h = sym_hashes[r_symndx]; | |
1736 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1737 | abort (); | |
1738 | ||
1049f94e | 1739 | if (! info->relocatable) |
252b5132 RH |
1740 | { |
1741 | if (h->root.type == bfd_link_hash_defined | |
1742 | || h->root.type == bfd_link_hash_defweak) | |
1743 | addend = (h->root.u.def.value | |
1744 | + h->root.u.def.section->output_section->vma | |
1745 | + h->root.u.def.section->output_offset); | |
1746 | else | |
1747 | { | |
1748 | /* Note that we pass the address as 0, since we | |
1749 | do not have a meaningful number for the | |
1750 | location within the section that is being | |
1751 | relocated. */ | |
1752 | if (! ((*info->callbacks->undefined_symbol) | |
1753 | (info, h->root.root.string, input_bfd, | |
b34976b6 AM |
1754 | input_section, (bfd_vma) 0, TRUE))) |
1755 | return FALSE; | |
252b5132 RH |
1756 | addend = 0; |
1757 | } | |
1758 | } | |
1759 | else | |
1760 | { | |
1761 | if (h->root.type != bfd_link_hash_defined | |
1762 | && h->root.type != bfd_link_hash_defweak | |
1763 | && h->indx == -1) | |
1764 | { | |
1765 | /* This symbol is not being written out. Pass | |
1766 | the address as 0, as with undefined_symbol, | |
1767 | above. */ | |
1768 | if (! ((*info->callbacks->unattached_reloc) | |
1769 | (info, h->root.root.string, input_bfd, | |
1770 | input_section, (bfd_vma) 0))) | |
b34976b6 | 1771 | return FALSE; |
252b5132 RH |
1772 | } |
1773 | ||
1774 | addend = alpha_convert_external_reloc (output_bfd, info, | |
1775 | input_bfd, | |
1776 | ext_rel, h); | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | addend += r_vaddr; | |
1781 | ||
1049f94e | 1782 | if (info->relocatable) |
252b5132 RH |
1783 | { |
1784 | /* Adjust r_vaddr by the addend. */ | |
dc810e39 | 1785 | H_PUT_64 (input_bfd, addend, ext_rel->r_vaddr); |
252b5132 RH |
1786 | } |
1787 | else | |
1788 | { | |
1789 | switch (r_type) | |
1790 | { | |
1791 | case ALPHA_R_OP_PUSH: | |
1792 | if (tos >= RELOC_STACKSIZE) | |
1793 | abort (); | |
1794 | stack[tos++] = addend; | |
1795 | break; | |
1796 | ||
1797 | case ALPHA_R_OP_PSUB: | |
1798 | if (tos == 0) | |
1799 | abort (); | |
1800 | stack[tos - 1] -= addend; | |
1801 | break; | |
1802 | ||
1803 | case ALPHA_R_OP_PRSHIFT: | |
1804 | if (tos == 0) | |
1805 | abort (); | |
1806 | stack[tos - 1] >>= addend; | |
1807 | break; | |
1808 | } | |
1809 | } | |
1810 | ||
b34976b6 | 1811 | adjust_addrp = FALSE; |
252b5132 RH |
1812 | break; |
1813 | ||
1814 | case ALPHA_R_OP_STORE: | |
1815 | /* Store a value from the reloc stack into a bitfield. If | |
1049f94e | 1816 | we are generating relocatable output, all we do is |
252b5132 | 1817 | adjust the address of the reloc. */ |
1049f94e | 1818 | if (! info->relocatable) |
252b5132 RH |
1819 | { |
1820 | bfd_vma mask; | |
1821 | bfd_vma val; | |
1822 | ||
1823 | if (tos == 0) | |
1824 | abort (); | |
1825 | ||
1826 | /* Get the relocation mask. The separate steps and the | |
1827 | casts to bfd_vma are attempts to avoid a bug in the | |
1828 | Alpha OSF 1.3 C compiler. See reloc.c for more | |
1829 | details. */ | |
1830 | mask = 1; | |
1831 | mask <<= (bfd_vma) r_size; | |
1832 | mask -= 1; | |
1833 | ||
1834 | /* FIXME: I don't know what kind of overflow checking, | |
1835 | if any, should be done here. */ | |
1836 | val = bfd_get_64 (input_bfd, | |
1837 | contents + r_vaddr - input_section->vma); | |
1838 | val &=~ mask << (bfd_vma) r_offset; | |
1839 | val |= (stack[--tos] & mask) << (bfd_vma) r_offset; | |
1840 | bfd_put_64 (input_bfd, val, | |
1841 | contents + r_vaddr - input_section->vma); | |
1842 | } | |
1843 | break; | |
1844 | ||
1845 | case ALPHA_R_GPVALUE: | |
1846 | /* I really don't know if this does the right thing. */ | |
1847 | gp = ecoff_data (input_bfd)->gp + r_symndx; | |
b34976b6 | 1848 | gp_undefined = FALSE; |
252b5132 RH |
1849 | break; |
1850 | } | |
1851 | ||
1852 | if (relocatep) | |
1853 | { | |
1854 | reloc_howto_type *howto; | |
1855 | struct ecoff_link_hash_entry *h = NULL; | |
1856 | asection *s = NULL; | |
1857 | bfd_vma relocation; | |
1858 | bfd_reloc_status_type r; | |
1859 | ||
1860 | /* Perform a relocation. */ | |
1861 | ||
1862 | howto = &alpha_howto_table[r_type]; | |
1863 | ||
1864 | if (r_extern) | |
1865 | { | |
1866 | h = sym_hashes[r_symndx]; | |
1867 | /* If h is NULL, that means that there is a reloc | |
1868 | against an external symbol which we thought was just | |
1869 | a debugging symbol. This should not happen. */ | |
1870 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
1871 | abort (); | |
1872 | } | |
1873 | else | |
1874 | { | |
1875 | if (r_symndx >= NUM_RELOC_SECTIONS) | |
1876 | s = NULL; | |
1877 | else | |
1878 | s = symndx_to_section[r_symndx]; | |
1879 | ||
1880 | if (s == (asection *) NULL) | |
1881 | abort (); | |
1882 | } | |
1883 | ||
1049f94e | 1884 | if (info->relocatable) |
252b5132 | 1885 | { |
1049f94e | 1886 | /* We are generating relocatable output, and must |
252b5132 RH |
1887 | convert the existing reloc. */ |
1888 | if (r_extern) | |
1889 | { | |
1890 | if (h->root.type != bfd_link_hash_defined | |
1891 | && h->root.type != bfd_link_hash_defweak | |
1892 | && h->indx == -1) | |
1893 | { | |
1894 | /* This symbol is not being written out. */ | |
1895 | if (! ((*info->callbacks->unattached_reloc) | |
1896 | (info, h->root.root.string, input_bfd, | |
1897 | input_section, r_vaddr - input_section->vma))) | |
b34976b6 | 1898 | return FALSE; |
252b5132 RH |
1899 | } |
1900 | ||
1901 | relocation = alpha_convert_external_reloc (output_bfd, | |
1902 | info, | |
1903 | input_bfd, | |
1904 | ext_rel, | |
1905 | h); | |
1906 | } | |
1907 | else | |
1908 | { | |
1909 | /* This is a relocation against a section. Adjust | |
1910 | the value by the amount the section moved. */ | |
1911 | relocation = (s->output_section->vma | |
1912 | + s->output_offset | |
1913 | - s->vma); | |
1914 | } | |
1915 | ||
1916 | /* If this is PC relative, the existing object file | |
1917 | appears to already have the reloc worked out. We | |
1918 | must subtract out the old value and add in the new | |
1919 | one. */ | |
1920 | if (howto->pc_relative) | |
1921 | relocation -= (input_section->output_section->vma | |
1922 | + input_section->output_offset | |
1923 | - input_section->vma); | |
1924 | ||
1925 | /* Put in any addend. */ | |
1926 | relocation += addend; | |
1927 | ||
1928 | /* Adjust the contents. */ | |
1929 | r = _bfd_relocate_contents (howto, input_bfd, relocation, | |
1930 | (contents | |
1931 | + r_vaddr | |
1932 | - input_section->vma)); | |
1933 | } | |
1934 | else | |
1935 | { | |
1936 | /* We are producing a final executable. */ | |
1937 | if (r_extern) | |
1938 | { | |
1939 | /* This is a reloc against a symbol. */ | |
1940 | if (h->root.type == bfd_link_hash_defined | |
1941 | || h->root.type == bfd_link_hash_defweak) | |
1942 | { | |
1943 | asection *hsec; | |
1944 | ||
1945 | hsec = h->root.u.def.section; | |
1946 | relocation = (h->root.u.def.value | |
1947 | + hsec->output_section->vma | |
1948 | + hsec->output_offset); | |
1949 | } | |
1950 | else | |
1951 | { | |
1952 | if (! ((*info->callbacks->undefined_symbol) | |
1953 | (info, h->root.root.string, input_bfd, | |
1954 | input_section, | |
b34976b6 AM |
1955 | r_vaddr - input_section->vma, TRUE))) |
1956 | return FALSE; | |
252b5132 RH |
1957 | relocation = 0; |
1958 | } | |
1959 | } | |
1960 | else | |
1961 | { | |
1962 | /* This is a reloc against a section. */ | |
1963 | relocation = (s->output_section->vma | |
1964 | + s->output_offset | |
1965 | - s->vma); | |
1966 | ||
1967 | /* Adjust a PC relative relocation by removing the | |
1968 | reference to the original source section. */ | |
1969 | if (howto->pc_relative) | |
1970 | relocation += input_section->vma; | |
1971 | } | |
1972 | ||
1973 | r = _bfd_final_link_relocate (howto, | |
1974 | input_bfd, | |
1975 | input_section, | |
1976 | contents, | |
1977 | r_vaddr - input_section->vma, | |
1978 | relocation, | |
1979 | addend); | |
1980 | } | |
1981 | ||
1982 | if (r != bfd_reloc_ok) | |
1983 | { | |
1984 | switch (r) | |
1985 | { | |
1986 | default: | |
1987 | case bfd_reloc_outofrange: | |
1988 | abort (); | |
1989 | case bfd_reloc_overflow: | |
1990 | { | |
1991 | const char *name; | |
1992 | ||
1993 | if (r_extern) | |
1994 | name = sym_hashes[r_symndx]->root.root.string; | |
1995 | else | |
1996 | name = bfd_section_name (input_bfd, | |
1997 | symndx_to_section[r_symndx]); | |
1998 | if (! ((*info->callbacks->reloc_overflow) | |
dfeffb9f L |
1999 | (info, NULL, name, |
2000 | alpha_howto_table[r_type].name, | |
252b5132 RH |
2001 | (bfd_vma) 0, input_bfd, input_section, |
2002 | r_vaddr - input_section->vma))) | |
b34976b6 | 2003 | return FALSE; |
252b5132 RH |
2004 | } |
2005 | break; | |
2006 | } | |
2007 | } | |
2008 | } | |
2009 | ||
1049f94e | 2010 | if (info->relocatable && adjust_addrp) |
252b5132 RH |
2011 | { |
2012 | /* Change the address of the relocation. */ | |
dc810e39 AM |
2013 | H_PUT_64 (input_bfd, |
2014 | (input_section->output_section->vma | |
2015 | + input_section->output_offset | |
2016 | - input_section->vma | |
2017 | + r_vaddr), | |
2018 | ext_rel->r_vaddr); | |
252b5132 RH |
2019 | } |
2020 | ||
2021 | if (gp_usedp && gp_undefined) | |
2022 | { | |
2023 | if (! ((*info->callbacks->reloc_dangerous) | |
cc9ff76a | 2024 | (info, _("GP relative relocation used when GP not defined"), |
252b5132 | 2025 | input_bfd, input_section, r_vaddr - input_section->vma))) |
b34976b6 | 2026 | return FALSE; |
252b5132 RH |
2027 | /* Only give the error once per link. */ |
2028 | gp = 4; | |
2029 | _bfd_set_gp_value (output_bfd, gp); | |
b34976b6 | 2030 | gp_undefined = FALSE; |
252b5132 RH |
2031 | } |
2032 | } | |
2033 | ||
2034 | if (tos != 0) | |
2035 | abort (); | |
2036 | ||
b34976b6 | 2037 | return TRUE; |
252b5132 RH |
2038 | } |
2039 | \f | |
2040 | /* Do final adjustments to the filehdr and the aouthdr. This routine | |
2041 | sets the dynamic bits in the file header. */ | |
2042 | ||
b34976b6 | 2043 | static bfd_boolean |
252b5132 RH |
2044 | alpha_adjust_headers (abfd, fhdr, ahdr) |
2045 | bfd *abfd; | |
2046 | struct internal_filehdr *fhdr; | |
b2747490 | 2047 | struct internal_aouthdr *ahdr ATTRIBUTE_UNUSED; |
252b5132 RH |
2048 | { |
2049 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == (DYNAMIC | EXEC_P)) | |
2050 | fhdr->f_flags |= F_ALPHA_CALL_SHARED; | |
2051 | else if ((abfd->flags & DYNAMIC) != 0) | |
2052 | fhdr->f_flags |= F_ALPHA_SHARABLE; | |
b34976b6 | 2053 | return TRUE; |
252b5132 RH |
2054 | } |
2055 | \f | |
2056 | /* Archive handling. In OSF/1 (or Digital Unix) v3.2, Digital | |
2057 | introduced archive packing, in which the elements in an archive are | |
2058 | optionally compressed using a simple dictionary scheme. We know | |
2059 | how to read such archives, but we don't write them. */ | |
2060 | ||
2061 | #define alpha_ecoff_slurp_armap _bfd_ecoff_slurp_armap | |
2062 | #define alpha_ecoff_slurp_extended_name_table \ | |
2063 | _bfd_ecoff_slurp_extended_name_table | |
2064 | #define alpha_ecoff_construct_extended_name_table \ | |
2065 | _bfd_ecoff_construct_extended_name_table | |
2066 | #define alpha_ecoff_truncate_arname _bfd_ecoff_truncate_arname | |
2067 | #define alpha_ecoff_write_armap _bfd_ecoff_write_armap | |
2068 | #define alpha_ecoff_generic_stat_arch_elt _bfd_ecoff_generic_stat_arch_elt | |
2069 | #define alpha_ecoff_update_armap_timestamp _bfd_ecoff_update_armap_timestamp | |
2070 | ||
2071 | /* A compressed file uses this instead of ARFMAG. */ | |
2072 | ||
2073 | #define ARFZMAG "Z\012" | |
2074 | ||
2075 | /* Read an archive header. This is like the standard routine, but it | |
2076 | also accepts ARFZMAG. */ | |
2077 | ||
2078 | static PTR | |
2079 | alpha_ecoff_read_ar_hdr (abfd) | |
2080 | bfd *abfd; | |
2081 | { | |
2082 | struct areltdata *ret; | |
2083 | struct ar_hdr *h; | |
2084 | ||
2085 | ret = (struct areltdata *) _bfd_generic_read_ar_hdr_mag (abfd, ARFZMAG); | |
2086 | if (ret == NULL) | |
2087 | return NULL; | |
2088 | ||
2089 | h = (struct ar_hdr *) ret->arch_header; | |
2090 | if (strncmp (h->ar_fmag, ARFZMAG, 2) == 0) | |
2091 | { | |
2092 | bfd_byte ab[8]; | |
2093 | ||
2094 | /* This is a compressed file. We must set the size correctly. | |
2095 | The size is the eight bytes after the dummy file header. */ | |
dc810e39 AM |
2096 | if (bfd_seek (abfd, (file_ptr) FILHSZ, SEEK_CUR) != 0 |
2097 | || bfd_bread (ab, (bfd_size_type) 8, abfd) != 8 | |
2098 | || bfd_seek (abfd, (file_ptr) (- (FILHSZ + 8)), SEEK_CUR) != 0) | |
252b5132 RH |
2099 | return NULL; |
2100 | ||
dc810e39 | 2101 | ret->parsed_size = H_GET_64 (abfd, ab); |
252b5132 RH |
2102 | } |
2103 | ||
2104 | return (PTR) ret; | |
2105 | } | |
2106 | ||
2107 | /* Get an archive element at a specified file position. This is where | |
2108 | we uncompress the archive element if necessary. */ | |
2109 | ||
2110 | static bfd * | |
2111 | alpha_ecoff_get_elt_at_filepos (archive, filepos) | |
2112 | bfd *archive; | |
2113 | file_ptr filepos; | |
2114 | { | |
2115 | bfd *nbfd = NULL; | |
2116 | struct areltdata *tdata; | |
2117 | struct ar_hdr *hdr; | |
2118 | bfd_byte ab[8]; | |
2119 | bfd_size_type size; | |
2120 | bfd_byte *buf, *p; | |
2121 | struct bfd_in_memory *bim; | |
2122 | ||
2123 | nbfd = _bfd_get_elt_at_filepos (archive, filepos); | |
2124 | if (nbfd == NULL) | |
2125 | goto error_return; | |
2126 | ||
2127 | if ((nbfd->flags & BFD_IN_MEMORY) != 0) | |
2128 | { | |
2129 | /* We have already expanded this BFD. */ | |
2130 | return nbfd; | |
2131 | } | |
2132 | ||
2133 | tdata = (struct areltdata *) nbfd->arelt_data; | |
2134 | hdr = (struct ar_hdr *) tdata->arch_header; | |
2135 | if (strncmp (hdr->ar_fmag, ARFZMAG, 2) != 0) | |
2136 | return nbfd; | |
2137 | ||
2138 | /* We must uncompress this element. We do this by copying it into a | |
dc810e39 | 2139 | memory buffer, and making bfd_bread and bfd_seek use that buffer. |
252b5132 RH |
2140 | This can use a lot of memory, but it's simpler than getting a |
2141 | temporary file, making that work with the file descriptor caching | |
2142 | code, and making sure that it is deleted at all appropriate | |
2143 | times. It can be changed if it ever becomes important. */ | |
2144 | ||
2145 | /* The compressed file starts with a dummy ECOFF file header. */ | |
dc810e39 | 2146 | if (bfd_seek (nbfd, (file_ptr) FILHSZ, SEEK_SET) != 0) |
252b5132 RH |
2147 | goto error_return; |
2148 | ||
2149 | /* The next eight bytes are the real file size. */ | |
dc810e39 | 2150 | if (bfd_bread (ab, (bfd_size_type) 8, nbfd) != 8) |
252b5132 | 2151 | goto error_return; |
dc810e39 | 2152 | size = H_GET_64 (nbfd, ab); |
252b5132 RH |
2153 | |
2154 | if (size == 0) | |
2155 | buf = NULL; | |
2156 | else | |
2157 | { | |
2158 | bfd_size_type left; | |
2159 | bfd_byte dict[4096]; | |
2160 | unsigned int h; | |
2161 | bfd_byte b; | |
2162 | ||
2163 | buf = (bfd_byte *) bfd_alloc (nbfd, size); | |
2164 | if (buf == NULL) | |
2165 | goto error_return; | |
2166 | p = buf; | |
2167 | ||
2168 | left = size; | |
2169 | ||
346ceb11 | 2170 | /* I don't know what the next eight bytes are for. */ |
dc810e39 | 2171 | if (bfd_bread (ab, (bfd_size_type) 8, nbfd) != 8) |
252b5132 RH |
2172 | goto error_return; |
2173 | ||
2174 | /* This is the uncompression algorithm. It's a simple | |
2175 | dictionary based scheme in which each character is predicted | |
2176 | by a hash of the previous three characters. A control byte | |
2177 | indicates whether the character is predicted or whether it | |
2178 | appears in the input stream; each control byte manages the | |
2179 | next eight bytes in the output stream. */ | |
2180 | memset (dict, 0, sizeof dict); | |
2181 | h = 0; | |
dc810e39 | 2182 | while (bfd_bread (&b, (bfd_size_type) 1, nbfd) == 1) |
252b5132 RH |
2183 | { |
2184 | unsigned int i; | |
2185 | ||
2186 | for (i = 0; i < 8; i++, b >>= 1) | |
2187 | { | |
2188 | bfd_byte n; | |
2189 | ||
2190 | if ((b & 1) == 0) | |
2191 | n = dict[h]; | |
2192 | else | |
2193 | { | |
dc810e39 | 2194 | if (! bfd_bread (&n, (bfd_size_type) 1, nbfd)) |
252b5132 RH |
2195 | goto error_return; |
2196 | dict[h] = n; | |
2197 | } | |
2198 | ||
2199 | *p++ = n; | |
2200 | ||
2201 | --left; | |
2202 | if (left == 0) | |
2203 | break; | |
2204 | ||
2205 | h <<= 4; | |
2206 | h ^= n; | |
2207 | h &= sizeof dict - 1; | |
2208 | } | |
2209 | ||
2210 | if (left == 0) | |
2211 | break; | |
2212 | } | |
2213 | } | |
2214 | ||
2215 | /* Now the uncompressed file contents are in buf. */ | |
2216 | bim = ((struct bfd_in_memory *) | |
dc810e39 | 2217 | bfd_alloc (nbfd, (bfd_size_type) sizeof (struct bfd_in_memory))); |
252b5132 RH |
2218 | if (bim == NULL) |
2219 | goto error_return; | |
2220 | bim->size = size; | |
2221 | bim->buffer = buf; | |
2222 | ||
b34976b6 | 2223 | nbfd->mtime_set = TRUE; |
252b5132 RH |
2224 | nbfd->mtime = strtol (hdr->ar_date, (char **) NULL, 10); |
2225 | ||
2226 | nbfd->flags |= BFD_IN_MEMORY; | |
2227 | nbfd->iostream = (PTR) bim; | |
2228 | BFD_ASSERT (! nbfd->cacheable); | |
2229 | ||
2230 | return nbfd; | |
2231 | ||
2232 | error_return: | |
2233 | if (nbfd != NULL) | |
2234 | bfd_close (nbfd); | |
346ceb11 | 2235 | return NULL; |
252b5132 RH |
2236 | } |
2237 | ||
2238 | /* Open the next archived file. */ | |
2239 | ||
2240 | static bfd * | |
2241 | alpha_ecoff_openr_next_archived_file (archive, last_file) | |
2242 | bfd *archive; | |
2243 | bfd *last_file; | |
2244 | { | |
2245 | file_ptr filestart; | |
2246 | ||
2247 | if (last_file == NULL) | |
2248 | filestart = bfd_ardata (archive)->first_file_filepos; | |
2249 | else | |
2250 | { | |
2251 | struct areltdata *t; | |
2252 | struct ar_hdr *h; | |
2253 | bfd_size_type size; | |
2254 | ||
2255 | /* We can't use arelt_size here, because that uses parsed_size, | |
2256 | which is the uncompressed size. We need the compressed size. */ | |
2257 | t = (struct areltdata *) last_file->arelt_data; | |
2258 | h = (struct ar_hdr *) t->arch_header; | |
2259 | size = strtol (h->ar_size, (char **) NULL, 10); | |
2260 | ||
2261 | /* Pad to an even boundary... | |
2262 | Note that last_file->origin can be odd in the case of | |
346ceb11 | 2263 | BSD-4.4-style element with a long odd size. */ |
252b5132 RH |
2264 | filestart = last_file->origin + size; |
2265 | filestart += filestart % 2; | |
2266 | } | |
2267 | ||
2268 | return alpha_ecoff_get_elt_at_filepos (archive, filestart); | |
2269 | } | |
2270 | ||
2271 | /* Open the archive file given an index into the armap. */ | |
2272 | ||
2273 | static bfd * | |
2274 | alpha_ecoff_get_elt_at_index (abfd, index) | |
2275 | bfd *abfd; | |
2276 | symindex index; | |
2277 | { | |
2278 | carsym *entry; | |
2279 | ||
2280 | entry = bfd_ardata (abfd)->symdefs + index; | |
2281 | return alpha_ecoff_get_elt_at_filepos (abfd, entry->file_offset); | |
2282 | } | |
2283 | \f | |
2284 | /* This is the ECOFF backend structure. The backend field of the | |
2285 | target vector points to this. */ | |
2286 | ||
2287 | static const struct ecoff_backend_data alpha_ecoff_backend_data = | |
2288 | { | |
2289 | /* COFF backend structure. */ | |
2290 | { | |
2291 | (void (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR))) bfd_void, /* aux_in */ | |
2292 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */ | |
2293 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */ | |
2294 | (unsigned (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR)))bfd_void,/*aux_out*/ | |
2295 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */ | |
2296 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */ | |
2297 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */ | |
2298 | alpha_ecoff_swap_filehdr_out, alpha_ecoff_swap_aouthdr_out, | |
2299 | alpha_ecoff_swap_scnhdr_out, | |
88183869 DK |
2300 | FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, TRUE, |
2301 | ECOFF_NO_LONG_SECTION_NAMES, 4, FALSE, 2, | |
252b5132 RH |
2302 | alpha_ecoff_swap_filehdr_in, alpha_ecoff_swap_aouthdr_in, |
2303 | alpha_ecoff_swap_scnhdr_in, NULL, | |
2304 | alpha_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook, | |
2305 | alpha_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags, | |
2306 | _bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table, | |
7b50b349 | 2307 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
2b5c217d | 2308 | NULL, NULL, NULL, NULL |
252b5132 RH |
2309 | }, |
2310 | /* Supported architecture. */ | |
2311 | bfd_arch_alpha, | |
2312 | /* Initial portion of armap string. */ | |
2313 | "________64", | |
2314 | /* The page boundary used to align sections in a demand-paged | |
2315 | executable file. E.g., 0x1000. */ | |
2316 | 0x2000, | |
b34976b6 AM |
2317 | /* TRUE if the .rdata section is part of the text segment, as on the |
2318 | Alpha. FALSE if .rdata is part of the data segment, as on the | |
252b5132 | 2319 | MIPS. */ |
b34976b6 | 2320 | TRUE, |
252b5132 RH |
2321 | /* Bitsize of constructor entries. */ |
2322 | 64, | |
2323 | /* Reloc to use for constructor entries. */ | |
2324 | &alpha_howto_table[ALPHA_R_REFQUAD], | |
2325 | { | |
2326 | /* Symbol table magic number. */ | |
2327 | magicSym2, | |
2328 | /* Alignment of debugging information. E.g., 4. */ | |
2329 | 8, | |
2330 | /* Sizes of external symbolic information. */ | |
2331 | sizeof (struct hdr_ext), | |
2332 | sizeof (struct dnr_ext), | |
2333 | sizeof (struct pdr_ext), | |
2334 | sizeof (struct sym_ext), | |
2335 | sizeof (struct opt_ext), | |
2336 | sizeof (struct fdr_ext), | |
2337 | sizeof (struct rfd_ext), | |
2338 | sizeof (struct ext_ext), | |
2339 | /* Functions to swap in external symbolic data. */ | |
2340 | ecoff_swap_hdr_in, | |
2341 | ecoff_swap_dnr_in, | |
2342 | ecoff_swap_pdr_in, | |
2343 | ecoff_swap_sym_in, | |
2344 | ecoff_swap_opt_in, | |
2345 | ecoff_swap_fdr_in, | |
2346 | ecoff_swap_rfd_in, | |
2347 | ecoff_swap_ext_in, | |
2348 | _bfd_ecoff_swap_tir_in, | |
2349 | _bfd_ecoff_swap_rndx_in, | |
2350 | /* Functions to swap out external symbolic data. */ | |
2351 | ecoff_swap_hdr_out, | |
2352 | ecoff_swap_dnr_out, | |
2353 | ecoff_swap_pdr_out, | |
2354 | ecoff_swap_sym_out, | |
2355 | ecoff_swap_opt_out, | |
2356 | ecoff_swap_fdr_out, | |
2357 | ecoff_swap_rfd_out, | |
2358 | ecoff_swap_ext_out, | |
2359 | _bfd_ecoff_swap_tir_out, | |
2360 | _bfd_ecoff_swap_rndx_out, | |
2361 | /* Function to read in symbolic data. */ | |
2362 | _bfd_ecoff_slurp_symbolic_info | |
2363 | }, | |
2364 | /* External reloc size. */ | |
2365 | RELSZ, | |
2366 | /* Reloc swapping functions. */ | |
2367 | alpha_ecoff_swap_reloc_in, | |
2368 | alpha_ecoff_swap_reloc_out, | |
2369 | /* Backend reloc tweaking. */ | |
2370 | alpha_adjust_reloc_in, | |
2371 | alpha_adjust_reloc_out, | |
2372 | /* Relocate section contents while linking. */ | |
2373 | alpha_relocate_section, | |
2374 | /* Do final adjustments to filehdr and aouthdr. */ | |
2375 | alpha_adjust_headers, | |
2376 | /* Read an element from an archive at a given file position. */ | |
2377 | alpha_ecoff_get_elt_at_filepos | |
2378 | }; | |
2379 | ||
2380 | /* Looking up a reloc type is Alpha specific. */ | |
2381 | #define _bfd_ecoff_bfd_reloc_type_lookup alpha_bfd_reloc_type_lookup | |
157090f7 AM |
2382 | #define _bfd_ecoff_bfd_reloc_name_lookup \ |
2383 | alpha_bfd_reloc_name_lookup | |
252b5132 RH |
2384 | |
2385 | /* So is getting relocated section contents. */ | |
2386 | #define _bfd_ecoff_bfd_get_relocated_section_contents \ | |
2387 | alpha_ecoff_get_relocated_section_contents | |
2388 | ||
2389 | /* Handling file windows is generic. */ | |
2390 | #define _bfd_ecoff_get_section_contents_in_window \ | |
2391 | _bfd_generic_get_section_contents_in_window | |
2392 | ||
2393 | /* Relaxing sections is generic. */ | |
2394 | #define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section | |
2395 | #define _bfd_ecoff_bfd_gc_sections bfd_generic_gc_sections | |
8550eb6e | 2396 | #define _bfd_ecoff_bfd_merge_sections bfd_generic_merge_sections |
72adc230 | 2397 | #define _bfd_ecoff_bfd_is_group_section bfd_generic_is_group_section |
e61463e1 | 2398 | #define _bfd_ecoff_bfd_discard_group bfd_generic_discard_group |
082b7297 L |
2399 | #define _bfd_ecoff_section_already_linked \ |
2400 | _bfd_generic_section_already_linked | |
3023e3f6 | 2401 | #define _bfd_ecoff_bfd_define_common_symbol bfd_generic_define_common_symbol |
252b5132 RH |
2402 | |
2403 | const bfd_target ecoffalpha_little_vec = | |
2404 | { | |
2405 | "ecoff-littlealpha", /* name */ | |
2406 | bfd_target_ecoff_flavour, | |
2407 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
2408 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
2409 | ||
2410 | (HAS_RELOC | EXEC_P | /* object flags */ | |
2411 | HAS_LINENO | HAS_DEBUG | | |
2412 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), | |
2413 | ||
2414 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA), | |
2415 | 0, /* leading underscore */ | |
2416 | ' ', /* ar_pad_char */ | |
2417 | 15, /* ar_max_namelen */ | |
2418 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2419 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2420 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
2421 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
2422 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
2423 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
2424 | ||
2425 | {_bfd_dummy_target, alpha_ecoff_object_p, /* bfd_check_format */ | |
66cd82b5 | 2426 | bfd_generic_archive_p, _bfd_dummy_target}, |
252b5132 RH |
2427 | {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */ |
2428 | _bfd_generic_mkarchive, bfd_false}, | |
2429 | {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */ | |
2430 | _bfd_write_archive_contents, bfd_false}, | |
2431 | ||
2432 | BFD_JUMP_TABLE_GENERIC (_bfd_ecoff), | |
2433 | BFD_JUMP_TABLE_COPY (_bfd_ecoff), | |
2434 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
2435 | BFD_JUMP_TABLE_ARCHIVE (alpha_ecoff), | |
2436 | BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff), | |
2437 | BFD_JUMP_TABLE_RELOCS (_bfd_ecoff), | |
2438 | BFD_JUMP_TABLE_WRITE (_bfd_ecoff), | |
2439 | BFD_JUMP_TABLE_LINK (_bfd_ecoff), | |
2440 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
2441 | ||
c3c89269 | 2442 | NULL, |
346ceb11 | 2443 | |
252b5132 RH |
2444 | (PTR) &alpha_ecoff_backend_data |
2445 | }; |