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5bd4f169 | 1 | /* PowerPC64-specific support for 64-bit ELF. |
5d1634d7 | 2 | Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
5bd4f169 AM |
3 | Written by Linus Nordberg, Swox AB <info@swox.com>, |
4 | based on elf32-ppc.c by Ian Lance Taylor. | |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | /* This file is based on the 64-bit PowerPC ELF ABI. It is also based | |
23 | on the file elf32-ppc.c. */ | |
24 | ||
25 | #include "bfd.h" | |
26 | #include "sysdep.h" | |
27 | #include "bfdlink.h" | |
28 | #include "libbfd.h" | |
29 | #include "elf-bfd.h" | |
30 | #include "elf/ppc.h" | |
5d1634d7 | 31 | #include "elf64-ppc.h" |
5bd4f169 AM |
32 | |
33 | #define USE_RELA /* we want RELA relocations, not REL. */ | |
34 | ||
35 | ||
36 | static void ppc_howto_init | |
37 | PARAMS ((void)); | |
38 | static reloc_howto_type *ppc64_elf_reloc_type_lookup | |
39 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
40 | static void ppc64_elf_info_to_howto | |
41 | PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst)); | |
805fc799 AM |
42 | static bfd_reloc_status_type ppc64_elf_ha_reloc |
43 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
44 | static bfd_reloc_status_type ppc64_elf_brtaken_reloc | |
45 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
46 | static bfd_reloc_status_type ppc64_elf_sectoff_reloc | |
47 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
48 | static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc | |
49 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
50 | static bfd_reloc_status_type ppc64_elf_toc_reloc | |
51 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
52 | static bfd_reloc_status_type ppc64_elf_toc_ha_reloc | |
53 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
54 | static bfd_reloc_status_type ppc64_elf_toc64_reloc | |
55 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
56 | static bfd_reloc_status_type ppc64_elf_unhandled_reloc | |
5bd4f169 AM |
57 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
58 | static boolean ppc64_elf_set_private_flags | |
59 | PARAMS ((bfd *, flagword)); | |
5bd4f169 AM |
60 | static boolean ppc64_elf_merge_private_bfd_data |
61 | PARAMS ((bfd *, bfd *)); | |
62 | static boolean ppc64_elf_section_from_shdr | |
63 | PARAMS ((bfd *, Elf64_Internal_Shdr *, char *)); | |
5bd4f169 AM |
64 | |
65 | ||
5bd4f169 AM |
66 | /* The name of the dynamic interpreter. This is put in the .interp |
67 | section. */ | |
68 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
69 | ||
70 | /* The size in bytes of an entry in the procedure linkage table. */ | |
71 | #define PLT_ENTRY_SIZE 24 | |
72 | ||
73 | /* The initial size of the plt reserved for the dynamic linker. */ | |
5d1634d7 | 74 | #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE |
5bd4f169 AM |
75 | |
76 | /* TOC base pointers offset from start of TOC. */ | |
77 | #define TOC_BASE_OFF (0x8000) | |
78 | ||
5d1634d7 AM |
79 | /* .plt call stub instructions. */ |
80 | #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ | |
81 | #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */ | |
82 | #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */ | |
83 | #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */ | |
84 | #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */ | |
85 | /* ld %r11,xxx+16@l(%r12) */ | |
86 | #define BCTR 0x4e800420 /* bctr */ | |
87 | ||
88 | /* The normal stub is this size. */ | |
89 | #define PLT_CALL_STUB_SIZE (7*4) | |
90 | ||
91 | /* But sometimes the .plt entry crosses a 64k boundary, and we need | |
92 | to adjust the high word with this insn. */ | |
93 | #define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */ | |
5bd4f169 | 94 | |
5d1634d7 AM |
95 | /* The .glink fixup call stub is the same as the .plt call stub, but |
96 | the first instruction restores r2, and the std is omitted. */ | |
97 | #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ | |
98 | ||
99 | /* Always allow this much space. */ | |
100 | #define GLINK_CALL_STUB_SIZE (8*4) | |
101 | ||
102 | /* Pad with this. */ | |
103 | #define NOP 0x60000000 | |
104 | ||
721956f4 AM |
105 | /* Some other nops. */ |
106 | #define CROR_151515 0x4def7b82 | |
107 | #define CROR_313131 0x4ffffb82 | |
108 | ||
5d1634d7 AM |
109 | /* .glink entries for the first 32k functions are two instructions. */ |
110 | #define LI_R0_0 0x38000000 /* li %r0,0 */ | |
111 | #define B_DOT 0x48000000 /* b . */ | |
112 | ||
113 | /* After that, we need two instructions to load the index, followed by | |
114 | a branch. */ | |
115 | #define LIS_R0_0 0x3c000000 /* lis %r0,0 */ | |
10ed1bba | 116 | #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ |
41bd81ab | 117 | |
82bd7b59 AM |
118 | /* Instructions to save and restore floating point regs. */ |
119 | #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ | |
120 | #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ | |
121 | #define BLR 0x4e800020 /* blr */ | |
122 | ||
41bd81ab AM |
123 | /* Since .opd is an array of descriptors and each entry will end up |
124 | with identical R_PPC64_RELATIVE relocs, there is really no need to | |
125 | propagate .opd relocs; The dynamic linker should be taught to | |
19397422 AM |
126 | relocate .opd without reloc entries. FIXME: .opd should be trimmed |
127 | of unused values. */ | |
41bd81ab AM |
128 | #ifndef NO_OPD_RELOCS |
129 | #define NO_OPD_RELOCS 0 | |
130 | #endif | |
5bd4f169 AM |
131 | \f |
132 | /* Relocation HOWTO's. */ | |
133 | static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max]; | |
134 | ||
135 | static reloc_howto_type ppc64_elf_howto_raw[] = { | |
136 | /* This reloc does nothing. */ | |
137 | HOWTO (R_PPC64_NONE, /* type */ | |
138 | 0, /* rightshift */ | |
139 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
140 | 32, /* bitsize */ | |
141 | false, /* pc_relative */ | |
142 | 0, /* bitpos */ | |
143 | complain_overflow_bitfield, /* complain_on_overflow */ | |
144 | bfd_elf_generic_reloc, /* special_function */ | |
145 | "R_PPC64_NONE", /* name */ | |
146 | false, /* partial_inplace */ | |
147 | 0, /* src_mask */ | |
148 | 0, /* dst_mask */ | |
149 | false), /* pcrel_offset */ | |
150 | ||
151 | /* A standard 32 bit relocation. */ | |
152 | HOWTO (R_PPC64_ADDR32, /* type */ | |
153 | 0, /* rightshift */ | |
154 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
155 | 32, /* bitsize */ | |
156 | false, /* pc_relative */ | |
157 | 0, /* bitpos */ | |
158 | complain_overflow_bitfield, /* complain_on_overflow */ | |
159 | bfd_elf_generic_reloc, /* special_function */ | |
160 | "R_PPC64_ADDR32", /* name */ | |
161 | false, /* partial_inplace */ | |
162 | 0, /* src_mask */ | |
163 | 0xffffffff, /* dst_mask */ | |
164 | false), /* pcrel_offset */ | |
165 | ||
166 | /* An absolute 26 bit branch; the lower two bits must be zero. | |
167 | FIXME: we don't check that, we just clear them. */ | |
168 | HOWTO (R_PPC64_ADDR24, /* type */ | |
169 | 0, /* rightshift */ | |
170 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
171 | 26, /* bitsize */ | |
172 | false, /* pc_relative */ | |
173 | 0, /* bitpos */ | |
174 | complain_overflow_bitfield, /* complain_on_overflow */ | |
175 | bfd_elf_generic_reloc, /* special_function */ | |
176 | "R_PPC64_ADDR24", /* name */ | |
177 | false, /* partial_inplace */ | |
178 | 0, /* src_mask */ | |
179 | 0x3fffffc, /* dst_mask */ | |
180 | false), /* pcrel_offset */ | |
181 | ||
182 | /* A standard 16 bit relocation. */ | |
183 | HOWTO (R_PPC64_ADDR16, /* type */ | |
184 | 0, /* rightshift */ | |
185 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
186 | 16, /* bitsize */ | |
187 | false, /* pc_relative */ | |
188 | 0, /* bitpos */ | |
189 | complain_overflow_bitfield, /* complain_on_overflow */ | |
190 | bfd_elf_generic_reloc, /* special_function */ | |
191 | "R_PPC64_ADDR16", /* name */ | |
192 | false, /* partial_inplace */ | |
193 | 0, /* src_mask */ | |
194 | 0xffff, /* dst_mask */ | |
195 | false), /* pcrel_offset */ | |
196 | ||
197 | /* A 16 bit relocation without overflow. */ | |
198 | HOWTO (R_PPC64_ADDR16_LO, /* type */ | |
199 | 0, /* rightshift */ | |
200 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
201 | 16, /* bitsize */ | |
202 | false, /* pc_relative */ | |
203 | 0, /* bitpos */ | |
204 | complain_overflow_dont,/* complain_on_overflow */ | |
205 | bfd_elf_generic_reloc, /* special_function */ | |
206 | "R_PPC64_ADDR16_LO", /* name */ | |
207 | false, /* partial_inplace */ | |
208 | 0, /* src_mask */ | |
209 | 0xffff, /* dst_mask */ | |
210 | false), /* pcrel_offset */ | |
211 | ||
212 | /* Bits 16-31 of an address. */ | |
213 | HOWTO (R_PPC64_ADDR16_HI, /* type */ | |
214 | 16, /* rightshift */ | |
215 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
216 | 16, /* bitsize */ | |
217 | false, /* pc_relative */ | |
218 | 0, /* bitpos */ | |
219 | complain_overflow_dont, /* complain_on_overflow */ | |
220 | bfd_elf_generic_reloc, /* special_function */ | |
221 | "R_PPC64_ADDR16_HI", /* name */ | |
222 | false, /* partial_inplace */ | |
223 | 0, /* src_mask */ | |
224 | 0xffff, /* dst_mask */ | |
225 | false), /* pcrel_offset */ | |
226 | ||
227 | /* Bits 16-31 of an address, plus 1 if the contents of the low 16 | |
228 | bits, treated as a signed number, is negative. */ | |
229 | HOWTO (R_PPC64_ADDR16_HA, /* type */ | |
230 | 16, /* rightshift */ | |
231 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
232 | 16, /* bitsize */ | |
233 | false, /* pc_relative */ | |
234 | 0, /* bitpos */ | |
235 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 236 | ppc64_elf_ha_reloc, /* special_function */ |
5bd4f169 AM |
237 | "R_PPC64_ADDR16_HA", /* name */ |
238 | false, /* partial_inplace */ | |
239 | 0, /* src_mask */ | |
240 | 0xffff, /* dst_mask */ | |
241 | false), /* pcrel_offset */ | |
242 | ||
243 | /* An absolute 16 bit branch; the lower two bits must be zero. | |
244 | FIXME: we don't check that, we just clear them. */ | |
245 | HOWTO (R_PPC64_ADDR14, /* type */ | |
246 | 0, /* rightshift */ | |
247 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
248 | 16, /* bitsize */ | |
249 | false, /* pc_relative */ | |
250 | 0, /* bitpos */ | |
251 | complain_overflow_bitfield, /* complain_on_overflow */ | |
252 | bfd_elf_generic_reloc, /* special_function */ | |
253 | "R_PPC64_ADDR14", /* name */ | |
254 | false, /* partial_inplace */ | |
255 | 0, /* src_mask */ | |
256 | 0xfffc, /* dst_mask */ | |
257 | false), /* pcrel_offset */ | |
258 | ||
259 | /* An absolute 16 bit branch, for which bit 10 should be set to | |
260 | indicate that the branch is expected to be taken. The lower two | |
261 | bits must be zero. */ | |
262 | HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */ | |
263 | 0, /* rightshift */ | |
264 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
265 | 16, /* bitsize */ | |
266 | false, /* pc_relative */ | |
267 | 0, /* bitpos */ | |
268 | complain_overflow_bitfield, /* complain_on_overflow */ | |
805fc799 | 269 | ppc64_elf_brtaken_reloc, /* special_function */ |
5bd4f169 AM |
270 | "R_PPC64_ADDR14_BRTAKEN",/* name */ |
271 | false, /* partial_inplace */ | |
272 | 0, /* src_mask */ | |
273 | 0xfffc, /* dst_mask */ | |
274 | false), /* pcrel_offset */ | |
275 | ||
276 | /* An absolute 16 bit branch, for which bit 10 should be set to | |
277 | indicate that the branch is not expected to be taken. The lower | |
278 | two bits must be zero. */ | |
279 | HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */ | |
280 | 0, /* rightshift */ | |
281 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
282 | 16, /* bitsize */ | |
283 | false, /* pc_relative */ | |
284 | 0, /* bitpos */ | |
285 | complain_overflow_bitfield, /* complain_on_overflow */ | |
805fc799 | 286 | ppc64_elf_brtaken_reloc, /* special_function */ |
5bd4f169 AM |
287 | "R_PPC64_ADDR14_BRNTAKEN",/* name */ |
288 | false, /* partial_inplace */ | |
289 | 0, /* src_mask */ | |
290 | 0xfffc, /* dst_mask */ | |
291 | false), /* pcrel_offset */ | |
292 | ||
293 | /* A relative 26 bit branch; the lower two bits must be zero. */ | |
294 | HOWTO (R_PPC64_REL24, /* type */ | |
295 | 0, /* rightshift */ | |
296 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
297 | 26, /* bitsize */ | |
298 | true, /* pc_relative */ | |
299 | 0, /* bitpos */ | |
300 | complain_overflow_signed, /* complain_on_overflow */ | |
301 | bfd_elf_generic_reloc, /* special_function */ | |
302 | "R_PPC64_REL24", /* name */ | |
303 | false, /* partial_inplace */ | |
304 | 0, /* src_mask */ | |
305 | 0x3fffffc, /* dst_mask */ | |
306 | true), /* pcrel_offset */ | |
307 | ||
308 | /* A relative 16 bit branch; the lower two bits must be zero. */ | |
309 | HOWTO (R_PPC64_REL14, /* type */ | |
310 | 0, /* rightshift */ | |
311 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
312 | 16, /* bitsize */ | |
313 | true, /* pc_relative */ | |
314 | 0, /* bitpos */ | |
315 | complain_overflow_signed, /* complain_on_overflow */ | |
316 | bfd_elf_generic_reloc, /* special_function */ | |
317 | "R_PPC64_REL14", /* name */ | |
318 | false, /* partial_inplace */ | |
319 | 0, /* src_mask */ | |
320 | 0xfffc, /* dst_mask */ | |
321 | true), /* pcrel_offset */ | |
322 | ||
323 | /* A relative 16 bit branch. Bit 10 should be set to indicate that | |
324 | the branch is expected to be taken. The lower two bits must be | |
325 | zero. */ | |
326 | HOWTO (R_PPC64_REL14_BRTAKEN, /* type */ | |
327 | 0, /* rightshift */ | |
328 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
329 | 16, /* bitsize */ | |
330 | true, /* pc_relative */ | |
331 | 0, /* bitpos */ | |
332 | complain_overflow_signed, /* complain_on_overflow */ | |
805fc799 | 333 | ppc64_elf_brtaken_reloc, /* special_function */ |
5bd4f169 AM |
334 | "R_PPC64_REL14_BRTAKEN", /* name */ |
335 | false, /* partial_inplace */ | |
336 | 0, /* src_mask */ | |
337 | 0xfffc, /* dst_mask */ | |
338 | true), /* pcrel_offset */ | |
339 | ||
340 | /* A relative 16 bit branch. Bit 10 should be set to indicate that | |
341 | the branch is not expected to be taken. The lower two bits must | |
342 | be zero. */ | |
343 | HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */ | |
344 | 0, /* rightshift */ | |
345 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
346 | 16, /* bitsize */ | |
347 | true, /* pc_relative */ | |
348 | 0, /* bitpos */ | |
349 | complain_overflow_signed, /* complain_on_overflow */ | |
805fc799 | 350 | ppc64_elf_brtaken_reloc, /* special_function */ |
5bd4f169 AM |
351 | "R_PPC64_REL14_BRNTAKEN",/* name */ |
352 | false, /* partial_inplace */ | |
353 | 0, /* src_mask */ | |
354 | 0xfffc, /* dst_mask */ | |
355 | true), /* pcrel_offset */ | |
356 | ||
357 | /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the | |
358 | symbol. */ | |
359 | HOWTO (R_PPC64_GOT16, /* type */ | |
360 | 0, /* rightshift */ | |
361 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
362 | 16, /* bitsize */ | |
363 | false, /* pc_relative */ | |
364 | 0, /* bitpos */ | |
365 | complain_overflow_signed, /* complain_on_overflow */ | |
805fc799 | 366 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
367 | "R_PPC64_GOT16", /* name */ |
368 | false, /* partial_inplace */ | |
369 | 0, /* src_mask */ | |
370 | 0xffff, /* dst_mask */ | |
371 | false), /* pcrel_offset */ | |
372 | ||
373 | /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for | |
374 | the symbol. */ | |
375 | HOWTO (R_PPC64_GOT16_LO, /* type */ | |
376 | 0, /* rightshift */ | |
377 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
378 | 16, /* bitsize */ | |
379 | false, /* pc_relative */ | |
380 | 0, /* bitpos */ | |
381 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 382 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
383 | "R_PPC64_GOT16_LO", /* name */ |
384 | false, /* partial_inplace */ | |
385 | 0, /* src_mask */ | |
386 | 0xffff, /* dst_mask */ | |
387 | false), /* pcrel_offset */ | |
388 | ||
389 | /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for | |
390 | the symbol. */ | |
391 | HOWTO (R_PPC64_GOT16_HI, /* type */ | |
392 | 16, /* rightshift */ | |
393 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
394 | 16, /* bitsize */ | |
395 | false, /* pc_relative */ | |
396 | 0, /* bitpos */ | |
397 | complain_overflow_dont,/* complain_on_overflow */ | |
805fc799 | 398 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
399 | "R_PPC64_GOT16_HI", /* name */ |
400 | false, /* partial_inplace */ | |
401 | 0, /* src_mask */ | |
402 | 0xffff, /* dst_mask */ | |
403 | false), /* pcrel_offset */ | |
404 | ||
405 | /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for | |
406 | the symbol. */ | |
407 | HOWTO (R_PPC64_GOT16_HA, /* type */ | |
408 | 16, /* rightshift */ | |
409 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
410 | 16, /* bitsize */ | |
411 | false, /* pc_relative */ | |
412 | 0, /* bitpos */ | |
413 | complain_overflow_dont,/* complain_on_overflow */ | |
805fc799 | 414 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
415 | "R_PPC64_GOT16_HA", /* name */ |
416 | false, /* partial_inplace */ | |
417 | 0, /* src_mask */ | |
418 | 0xffff, /* dst_mask */ | |
419 | false), /* pcrel_offset */ | |
420 | ||
421 | /* This is used only by the dynamic linker. The symbol should exist | |
422 | both in the object being run and in some shared library. The | |
423 | dynamic linker copies the data addressed by the symbol from the | |
424 | shared library into the object, because the object being | |
425 | run has to have the data at some particular address. */ | |
426 | HOWTO (R_PPC64_COPY, /* type */ | |
427 | 0, /* rightshift */ | |
428 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
429 | 32, /* bitsize */ | |
430 | false, /* pc_relative */ | |
431 | 0, /* bitpos */ | |
432 | complain_overflow_bitfield, /* complain_on_overflow */ | |
805fc799 | 433 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
434 | "R_PPC64_COPY", /* name */ |
435 | false, /* partial_inplace */ | |
436 | 0, /* src_mask */ | |
437 | 0, /* dst_mask */ | |
438 | false), /* pcrel_offset */ | |
439 | ||
440 | /* Like R_PPC64_ADDR64, but used when setting global offset table | |
441 | entries. */ | |
442 | HOWTO (R_PPC64_GLOB_DAT, /* type */ | |
443 | 0, /* rightshift */ | |
444 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ | |
445 | 64, /* bitsize */ | |
446 | false, /* pc_relative */ | |
447 | 0, /* bitpos */ | |
448 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 449 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
450 | "R_PPC64_GLOB_DAT", /* name */ |
451 | false, /* partial_inplace */ | |
452 | 0, /* src_mask */ | |
453 | 0xffffffffffffffff, /* dst_mask */ | |
454 | false), /* pcrel_offset */ | |
455 | ||
456 | /* Created by the link editor. Marks a procedure linkage table | |
457 | entry for a symbol. */ | |
458 | HOWTO (R_PPC64_JMP_SLOT, /* type */ | |
459 | 0, /* rightshift */ | |
460 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
461 | 0, /* bitsize */ | |
462 | false, /* pc_relative */ | |
463 | 0, /* bitpos */ | |
464 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 465 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
466 | "R_PPC64_JMP_SLOT", /* name */ |
467 | false, /* partial_inplace */ | |
468 | 0, /* src_mask */ | |
469 | 0, /* dst_mask */ | |
470 | false), /* pcrel_offset */ | |
471 | ||
472 | /* Used only by the dynamic linker. When the object is run, this | |
473 | doubleword64 is set to the load address of the object, plus the | |
474 | addend. */ | |
475 | HOWTO (R_PPC64_RELATIVE, /* type */ | |
476 | 0, /* rightshift */ | |
477 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ | |
478 | 64, /* bitsize */ | |
8fc39d5d | 479 | false, /* pc_relative */ |
5bd4f169 AM |
480 | 0, /* bitpos */ |
481 | complain_overflow_dont, /* complain_on_overflow */ | |
482 | bfd_elf_generic_reloc, /* special_function */ | |
483 | "R_PPC64_RELATIVE", /* name */ | |
484 | false, /* partial_inplace */ | |
485 | 0, /* src_mask */ | |
486 | 0xffffffffffffffff, /* dst_mask */ | |
8fc39d5d | 487 | false), /* pcrel_offset */ |
5bd4f169 AM |
488 | |
489 | /* Like R_PPC64_ADDR32, but may be unaligned. */ | |
490 | HOWTO (R_PPC64_UADDR32, /* type */ | |
491 | 0, /* rightshift */ | |
492 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
493 | 32, /* bitsize */ | |
494 | false, /* pc_relative */ | |
495 | 0, /* bitpos */ | |
496 | complain_overflow_bitfield, /* complain_on_overflow */ | |
497 | bfd_elf_generic_reloc, /* special_function */ | |
498 | "R_PPC64_UADDR32", /* name */ | |
499 | false, /* partial_inplace */ | |
500 | 0, /* src_mask */ | |
501 | 0xffffffff, /* dst_mask */ | |
502 | false), /* pcrel_offset */ | |
503 | ||
504 | /* Like R_PPC64_ADDR16, but may be unaligned. */ | |
505 | HOWTO (R_PPC64_UADDR16, /* type */ | |
506 | 0, /* rightshift */ | |
507 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
508 | 16, /* bitsize */ | |
509 | false, /* pc_relative */ | |
510 | 0, /* bitpos */ | |
511 | complain_overflow_bitfield, /* complain_on_overflow */ | |
512 | bfd_elf_generic_reloc, /* special_function */ | |
513 | "R_PPC64_UADDR16", /* name */ | |
514 | false, /* partial_inplace */ | |
515 | 0, /* src_mask */ | |
516 | 0xffff, /* dst_mask */ | |
517 | false), /* pcrel_offset */ | |
518 | ||
519 | /* 32-bit PC relative. */ | |
520 | HOWTO (R_PPC64_REL32, /* type */ | |
521 | 0, /* rightshift */ | |
522 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
523 | 32, /* bitsize */ | |
524 | true, /* pc_relative */ | |
525 | 0, /* bitpos */ | |
526 | /* FIXME: Verify. Was complain_overflow_bitfield. */ | |
527 | complain_overflow_signed, /* complain_on_overflow */ | |
528 | bfd_elf_generic_reloc, /* special_function */ | |
529 | "R_PPC64_REL32", /* name */ | |
530 | false, /* partial_inplace */ | |
531 | 0, /* src_mask */ | |
532 | 0xffffffff, /* dst_mask */ | |
533 | true), /* pcrel_offset */ | |
534 | ||
10ed1bba | 535 | /* 32-bit relocation to the symbol's procedure linkage table. */ |
5bd4f169 AM |
536 | HOWTO (R_PPC64_PLT32, /* type */ |
537 | 0, /* rightshift */ | |
538 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
539 | 32, /* bitsize */ | |
540 | false, /* pc_relative */ | |
541 | 0, /* bitpos */ | |
542 | complain_overflow_bitfield, /* complain_on_overflow */ | |
805fc799 | 543 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
544 | "R_PPC64_PLT32", /* name */ |
545 | false, /* partial_inplace */ | |
546 | 0, /* src_mask */ | |
547 | 0, /* dst_mask */ | |
548 | false), /* pcrel_offset */ | |
549 | ||
550 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. | |
551 | FIXME: R_PPC64_PLTREL32 not supported. */ | |
552 | HOWTO (R_PPC64_PLTREL32, /* type */ | |
553 | 0, /* rightshift */ | |
554 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
555 | 32, /* bitsize */ | |
556 | true, /* pc_relative */ | |
557 | 0, /* bitpos */ | |
558 | complain_overflow_signed, /* complain_on_overflow */ | |
559 | bfd_elf_generic_reloc, /* special_function */ | |
560 | "R_PPC64_PLTREL32", /* name */ | |
561 | false, /* partial_inplace */ | |
562 | 0, /* src_mask */ | |
563 | 0, /* dst_mask */ | |
564 | true), /* pcrel_offset */ | |
565 | ||
566 | /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for | |
567 | the symbol. */ | |
568 | HOWTO (R_PPC64_PLT16_LO, /* type */ | |
569 | 0, /* rightshift */ | |
570 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
571 | 16, /* bitsize */ | |
572 | false, /* pc_relative */ | |
573 | 0, /* bitpos */ | |
574 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 575 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
576 | "R_PPC64_PLT16_LO", /* name */ |
577 | false, /* partial_inplace */ | |
578 | 0, /* src_mask */ | |
579 | 0xffff, /* dst_mask */ | |
580 | false), /* pcrel_offset */ | |
581 | ||
582 | /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for | |
583 | the symbol. */ | |
584 | HOWTO (R_PPC64_PLT16_HI, /* type */ | |
585 | 16, /* rightshift */ | |
586 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
587 | 16, /* bitsize */ | |
588 | false, /* pc_relative */ | |
589 | 0, /* bitpos */ | |
590 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 591 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
592 | "R_PPC64_PLT16_HI", /* name */ |
593 | false, /* partial_inplace */ | |
594 | 0, /* src_mask */ | |
595 | 0xffff, /* dst_mask */ | |
596 | false), /* pcrel_offset */ | |
597 | ||
598 | /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for | |
599 | the symbol. */ | |
600 | HOWTO (R_PPC64_PLT16_HA, /* type */ | |
601 | 16, /* rightshift */ | |
602 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
603 | 16, /* bitsize */ | |
604 | false, /* pc_relative */ | |
605 | 0, /* bitpos */ | |
606 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 607 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
608 | "R_PPC64_PLT16_HA", /* name */ |
609 | false, /* partial_inplace */ | |
610 | 0, /* src_mask */ | |
611 | 0xffff, /* dst_mask */ | |
612 | false), /* pcrel_offset */ | |
613 | ||
c061c2d8 | 614 | /* 16-bit section relative relocation. */ |
5bd4f169 AM |
615 | HOWTO (R_PPC64_SECTOFF, /* type */ |
616 | 0, /* rightshift */ | |
c061c2d8 AM |
617 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
618 | 16, /* bitsize */ | |
805fc799 | 619 | false, /* pc_relative */ |
5bd4f169 AM |
620 | 0, /* bitpos */ |
621 | complain_overflow_bitfield, /* complain_on_overflow */ | |
805fc799 | 622 | ppc64_elf_sectoff_reloc, /* special_function */ |
5bd4f169 AM |
623 | "R_PPC64_SECTOFF", /* name */ |
624 | false, /* partial_inplace */ | |
625 | 0, /* src_mask */ | |
c061c2d8 | 626 | 0xffff, /* dst_mask */ |
805fc799 | 627 | false), /* pcrel_offset */ |
5bd4f169 | 628 | |
c061c2d8 | 629 | /* Like R_PPC64_SECTOFF, but no overflow warning. */ |
5bd4f169 AM |
630 | HOWTO (R_PPC64_SECTOFF_LO, /* type */ |
631 | 0, /* rightshift */ | |
632 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
633 | 16, /* bitsize */ | |
634 | false, /* pc_relative */ | |
635 | 0, /* bitpos */ | |
636 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 637 | ppc64_elf_sectoff_reloc, /* special_function */ |
5bd4f169 AM |
638 | "R_PPC64_SECTOFF_LO", /* name */ |
639 | false, /* partial_inplace */ | |
640 | 0, /* src_mask */ | |
641 | 0xffff, /* dst_mask */ | |
642 | false), /* pcrel_offset */ | |
643 | ||
644 | /* 16-bit upper half section relative relocation. */ | |
645 | HOWTO (R_PPC64_SECTOFF_HI, /* type */ | |
646 | 16, /* rightshift */ | |
647 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
648 | 16, /* bitsize */ | |
649 | false, /* pc_relative */ | |
650 | 0, /* bitpos */ | |
651 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 652 | ppc64_elf_sectoff_reloc, /* special_function */ |
5bd4f169 AM |
653 | "R_PPC64_SECTOFF_HI", /* name */ |
654 | false, /* partial_inplace */ | |
655 | 0, /* src_mask */ | |
656 | 0xffff, /* dst_mask */ | |
657 | false), /* pcrel_offset */ | |
658 | ||
659 | /* 16-bit upper half adjusted section relative relocation. */ | |
660 | HOWTO (R_PPC64_SECTOFF_HA, /* type */ | |
661 | 16, /* rightshift */ | |
662 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
663 | 16, /* bitsize */ | |
664 | false, /* pc_relative */ | |
665 | 0, /* bitpos */ | |
666 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 667 | ppc64_elf_sectoff_ha_reloc, /* special_function */ |
5bd4f169 AM |
668 | "R_PPC64_SECTOFF_HA", /* name */ |
669 | false, /* partial_inplace */ | |
670 | 0, /* src_mask */ | |
671 | 0xffff, /* dst_mask */ | |
672 | false), /* pcrel_offset */ | |
673 | ||
674 | /* Like R_PPC64_REL24 without touching the two least significant | |
805fc799 | 675 | bits. Should have been named R_PPC64_REL30! */ |
5bd4f169 AM |
676 | HOWTO (R_PPC64_ADDR30, /* type */ |
677 | 2, /* rightshift */ | |
678 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
679 | 30, /* bitsize */ | |
680 | true, /* pc_relative */ | |
681 | 0, /* bitpos */ | |
682 | complain_overflow_dont, /* complain_on_overflow */ | |
683 | bfd_elf_generic_reloc, /* special_function */ | |
684 | "R_PPC64_ADDR30", /* name */ | |
685 | false, /* partial_inplace */ | |
686 | 0, /* src_mask */ | |
687 | 0xfffffffc, /* dst_mask */ | |
688 | true), /* pcrel_offset */ | |
689 | ||
690 | /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ | |
691 | ||
692 | /* A standard 64-bit relocation. */ | |
693 | HOWTO (R_PPC64_ADDR64, /* type */ | |
694 | 0, /* rightshift */ | |
695 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ | |
696 | 64, /* bitsize */ | |
697 | false, /* pc_relative */ | |
698 | 0, /* bitpos */ | |
699 | complain_overflow_dont, /* complain_on_overflow */ | |
700 | bfd_elf_generic_reloc, /* special_function */ | |
701 | "R_PPC64_ADDR64", /* name */ | |
702 | false, /* partial_inplace */ | |
703 | 0, /* src_mask */ | |
704 | 0xffffffffffffffff, /* dst_mask */ | |
705 | false), /* pcrel_offset */ | |
706 | ||
707 | /* The bits 32-47 of an address. */ | |
708 | HOWTO (R_PPC64_ADDR16_HIGHER, /* type */ | |
709 | 32, /* rightshift */ | |
710 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
711 | 16, /* bitsize */ | |
712 | false, /* pc_relative */ | |
713 | 0, /* bitpos */ | |
714 | complain_overflow_dont, /* complain_on_overflow */ | |
715 | bfd_elf_generic_reloc, /* special_function */ | |
716 | "R_PPC64_ADDR16_HIGHER", /* name */ | |
717 | false, /* partial_inplace */ | |
718 | 0, /* src_mask */ | |
719 | 0xffff, /* dst_mask */ | |
720 | false), /* pcrel_offset */ | |
721 | ||
722 | /* The bits 32-47 of an address, plus 1 if the contents of the low | |
723 | 16 bits, treated as a signed number, is negative. */ | |
724 | HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */ | |
725 | 32, /* rightshift */ | |
726 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
727 | 16, /* bitsize */ | |
728 | false, /* pc_relative */ | |
729 | 0, /* bitpos */ | |
730 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 731 | ppc64_elf_ha_reloc, /* special_function */ |
5bd4f169 AM |
732 | "R_PPC64_ADDR16_HIGHERA", /* name */ |
733 | false, /* partial_inplace */ | |
734 | 0, /* src_mask */ | |
735 | 0xffff, /* dst_mask */ | |
736 | false), /* pcrel_offset */ | |
737 | ||
738 | /* The bits 48-63 of an address. */ | |
739 | HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */ | |
740 | 48, /* rightshift */ | |
741 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
742 | 16, /* bitsize */ | |
743 | false, /* pc_relative */ | |
744 | 0, /* bitpos */ | |
745 | complain_overflow_dont, /* complain_on_overflow */ | |
746 | bfd_elf_generic_reloc, /* special_function */ | |
747 | "R_PPC64_ADDR16_HIGHEST", /* name */ | |
748 | false, /* partial_inplace */ | |
749 | 0, /* src_mask */ | |
750 | 0xffff, /* dst_mask */ | |
751 | false), /* pcrel_offset */ | |
752 | ||
753 | /* The bits 48-63 of an address, plus 1 if the contents of the low | |
754 | 16 bits, treated as a signed number, is negative. */ | |
755 | HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */ | |
756 | 48, /* rightshift */ | |
757 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
758 | 16, /* bitsize */ | |
759 | false, /* pc_relative */ | |
760 | 0, /* bitpos */ | |
761 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 762 | ppc64_elf_ha_reloc, /* special_function */ |
5bd4f169 AM |
763 | "R_PPC64_ADDR16_HIGHESTA", /* name */ |
764 | false, /* partial_inplace */ | |
765 | 0, /* src_mask */ | |
766 | 0xffff, /* dst_mask */ | |
767 | false), /* pcrel_offset */ | |
768 | ||
769 | /* Like ADDR64, but may be unaligned. */ | |
770 | HOWTO (R_PPC64_UADDR64, /* type */ | |
771 | 0, /* rightshift */ | |
772 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ | |
773 | 64, /* bitsize */ | |
774 | false, /* pc_relative */ | |
775 | 0, /* bitpos */ | |
776 | complain_overflow_dont, /* complain_on_overflow */ | |
777 | bfd_elf_generic_reloc, /* special_function */ | |
778 | "R_PPC64_UADDR64", /* name */ | |
779 | false, /* partial_inplace */ | |
780 | 0, /* src_mask */ | |
781 | 0xffffffffffffffff, /* dst_mask */ | |
782 | false), /* pcrel_offset */ | |
783 | ||
784 | /* 64-bit relative relocation. */ | |
785 | HOWTO (R_PPC64_REL64, /* type */ | |
786 | 0, /* rightshift */ | |
787 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ | |
788 | 64, /* bitsize */ | |
789 | true, /* pc_relative */ | |
790 | 0, /* bitpos */ | |
791 | complain_overflow_dont, /* complain_on_overflow */ | |
792 | bfd_elf_generic_reloc, /* special_function */ | |
793 | "R_PPC64_REL64", /* name */ | |
794 | false, /* partial_inplace */ | |
795 | 0, /* src_mask */ | |
796 | 0xffffffffffffffff, /* dst_mask */ | |
797 | true), /* pcrel_offset */ | |
798 | ||
799 | /* 64-bit relocation to the symbol's procedure linkage table. */ | |
5bd4f169 AM |
800 | HOWTO (R_PPC64_PLT64, /* type */ |
801 | 0, /* rightshift */ | |
802 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ | |
803 | 64, /* bitsize */ | |
804 | false, /* pc_relative */ | |
805 | 0, /* bitpos */ | |
806 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 807 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
808 | "R_PPC64_PLT64", /* name */ |
809 | false, /* partial_inplace */ | |
810 | 0, /* src_mask */ | |
811 | 0, /* dst_mask */ | |
812 | false), /* pcrel_offset */ | |
813 | ||
814 | /* 64-bit PC relative relocation to the symbol's procedure linkage | |
815 | table. */ | |
816 | /* FIXME: R_PPC64_PLTREL64 not supported. */ | |
817 | HOWTO (R_PPC64_PLTREL64, /* type */ | |
818 | 0, /* rightshift */ | |
819 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ | |
820 | 64, /* bitsize */ | |
821 | true, /* pc_relative */ | |
822 | 0, /* bitpos */ | |
823 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 824 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
825 | "R_PPC64_PLTREL64", /* name */ |
826 | false, /* partial_inplace */ | |
827 | 0, /* src_mask */ | |
828 | 0, /* dst_mask */ | |
829 | true), /* pcrel_offset */ | |
830 | ||
831 | /* 16 bit TOC-relative relocation. */ | |
832 | ||
833 | /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ | |
834 | HOWTO (R_PPC64_TOC16, /* type */ | |
835 | 0, /* rightshift */ | |
836 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
837 | 16, /* bitsize */ | |
838 | false, /* pc_relative */ | |
839 | 0, /* bitpos */ | |
840 | complain_overflow_signed, /* complain_on_overflow */ | |
805fc799 | 841 | ppc64_elf_toc_reloc, /* special_function */ |
5bd4f169 AM |
842 | "R_PPC64_TOC16", /* name */ |
843 | false, /* partial_inplace */ | |
844 | 0, /* src_mask */ | |
845 | 0xffff, /* dst_mask */ | |
846 | false), /* pcrel_offset */ | |
847 | ||
848 | /* 16 bit TOC-relative relocation without overflow. */ | |
849 | ||
850 | /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ | |
851 | HOWTO (R_PPC64_TOC16_LO, /* type */ | |
852 | 0, /* rightshift */ | |
853 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
854 | 16, /* bitsize */ | |
855 | false, /* pc_relative */ | |
856 | 0, /* bitpos */ | |
857 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 858 | ppc64_elf_toc_reloc, /* special_function */ |
5bd4f169 AM |
859 | "R_PPC64_TOC16_LO", /* name */ |
860 | false, /* partial_inplace */ | |
861 | 0, /* src_mask */ | |
862 | 0xffff, /* dst_mask */ | |
863 | false), /* pcrel_offset */ | |
864 | ||
865 | /* 16 bit TOC-relative relocation, high 16 bits. */ | |
866 | ||
867 | /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ | |
868 | HOWTO (R_PPC64_TOC16_HI, /* type */ | |
869 | 16, /* rightshift */ | |
870 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
871 | 16, /* bitsize */ | |
872 | false, /* pc_relative */ | |
873 | 0, /* bitpos */ | |
874 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 875 | ppc64_elf_toc_reloc, /* special_function */ |
5bd4f169 AM |
876 | "R_PPC64_TOC16_HI", /* name */ |
877 | false, /* partial_inplace */ | |
878 | 0, /* src_mask */ | |
879 | 0xffff, /* dst_mask */ | |
880 | false), /* pcrel_offset */ | |
881 | ||
882 | /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the | |
883 | contents of the low 16 bits, treated as a signed number, is | |
884 | negative. */ | |
885 | ||
886 | /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ | |
887 | HOWTO (R_PPC64_TOC16_HA, /* type */ | |
888 | 16, /* rightshift */ | |
889 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
890 | 16, /* bitsize */ | |
891 | false, /* pc_relative */ | |
892 | 0, /* bitpos */ | |
893 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 894 | ppc64_elf_toc_ha_reloc, /* special_function */ |
5bd4f169 AM |
895 | "R_PPC64_TOC16_HA", /* name */ |
896 | false, /* partial_inplace */ | |
897 | 0, /* src_mask */ | |
898 | 0xffff, /* dst_mask */ | |
899 | false), /* pcrel_offset */ | |
900 | ||
901 | /* 64-bit relocation; insert value of TOC base (.TOC.). */ | |
902 | ||
903 | /* R_PPC64_TOC 51 doubleword64 .TOC. */ | |
904 | HOWTO (R_PPC64_TOC, /* type */ | |
905 | 0, /* rightshift */ | |
906 | 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ | |
907 | 64, /* bitsize */ | |
908 | false, /* pc_relative */ | |
909 | 0, /* bitpos */ | |
910 | complain_overflow_bitfield, /* complain_on_overflow */ | |
805fc799 | 911 | ppc64_elf_toc64_reloc, /* special_function */ |
5bd4f169 AM |
912 | "R_PPC64_TOC", /* name */ |
913 | false, /* partial_inplace */ | |
914 | 0, /* src_mask */ | |
915 | 0xffffffffffffffff, /* dst_mask */ | |
916 | false), /* pcrel_offset */ | |
917 | ||
918 | /* Like R_PPC64_GOT16, but also informs the link editor that the | |
919 | value to relocate may (!) refer to a PLT entry which the link | |
920 | editor (a) may replace with the symbol value. If the link editor | |
921 | is unable to fully resolve the symbol, it may (b) create a PLT | |
922 | entry and store the address to the new PLT entry in the GOT. | |
923 | This permits lazy resolution of function symbols at run time. | |
924 | The link editor may also skip all of this and just (c) emit a | |
925 | R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ | |
926 | /* FIXME: R_PPC64_PLTGOT16 not implemented. */ | |
927 | HOWTO (R_PPC64_PLTGOT16, /* type */ | |
928 | 0, /* rightshift */ | |
929 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
930 | 16, /* bitsize */ | |
931 | false, /* pc_relative */ | |
932 | 0, /* bitpos */ | |
933 | complain_overflow_signed, /* complain_on_overflow */ | |
805fc799 | 934 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
935 | "R_PPC64_PLTGOT16", /* name */ |
936 | false, /* partial_inplace */ | |
937 | 0, /* src_mask */ | |
938 | 0xffff, /* dst_mask */ | |
939 | false), /* pcrel_offset */ | |
940 | ||
941 | /* Like R_PPC64_PLTGOT16, but without overflow. */ | |
942 | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ | |
943 | HOWTO (R_PPC64_PLTGOT16_LO, /* type */ | |
944 | 0, /* rightshift */ | |
945 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
946 | 16, /* bitsize */ | |
947 | false, /* pc_relative */ | |
948 | 0, /* bitpos */ | |
949 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 950 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
951 | "R_PPC64_PLTGOT16_LO", /* name */ |
952 | false, /* partial_inplace */ | |
953 | 0, /* src_mask */ | |
954 | 0xffff, /* dst_mask */ | |
955 | false), /* pcrel_offset */ | |
956 | ||
957 | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ | |
958 | /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ | |
959 | HOWTO (R_PPC64_PLTGOT16_HI, /* type */ | |
960 | 16, /* rightshift */ | |
961 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
962 | 16, /* bitsize */ | |
963 | false, /* pc_relative */ | |
964 | 0, /* bitpos */ | |
965 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 966 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
967 | "R_PPC64_PLTGOT16_HI", /* name */ |
968 | false, /* partial_inplace */ | |
969 | 0, /* src_mask */ | |
970 | 0xffff, /* dst_mask */ | |
971 | false), /* pcrel_offset */ | |
972 | ||
973 | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus | |
974 | 1 if the contents of the low 16 bits, treated as a signed number, | |
975 | is negative. */ | |
976 | /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ | |
977 | HOWTO (R_PPC64_PLTGOT16_HA, /* type */ | |
978 | 16, /* rightshift */ | |
979 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
980 | 16, /* bitsize */ | |
981 | false, /* pc_relative */ | |
982 | 0, /* bitpos */ | |
983 | complain_overflow_dont,/* complain_on_overflow */ | |
805fc799 | 984 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
985 | "R_PPC64_PLTGOT16_HA", /* name */ |
986 | false, /* partial_inplace */ | |
987 | 0, /* src_mask */ | |
988 | 0xffff, /* dst_mask */ | |
989 | false), /* pcrel_offset */ | |
990 | ||
991 | /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ | |
992 | HOWTO (R_PPC64_ADDR16_DS, /* type */ | |
993 | 0, /* rightshift */ | |
994 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
995 | 16, /* bitsize */ | |
996 | false, /* pc_relative */ | |
997 | 0, /* bitpos */ | |
998 | complain_overflow_bitfield, /* complain_on_overflow */ | |
999 | bfd_elf_generic_reloc, /* special_function */ | |
1000 | "R_PPC64_ADDR16_DS", /* name */ | |
1001 | false, /* partial_inplace */ | |
1002 | 0, /* src_mask */ | |
1003 | 0xfffc, /* dst_mask */ | |
1004 | false), /* pcrel_offset */ | |
1005 | ||
1006 | /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ | |
1007 | HOWTO (R_PPC64_ADDR16_LO_DS, /* type */ | |
1008 | 0, /* rightshift */ | |
1009 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1010 | 16, /* bitsize */ | |
1011 | false, /* pc_relative */ | |
1012 | 0, /* bitpos */ | |
1013 | complain_overflow_dont,/* complain_on_overflow */ | |
1014 | bfd_elf_generic_reloc, /* special_function */ | |
1015 | "R_PPC64_ADDR16_LO_DS",/* name */ | |
1016 | false, /* partial_inplace */ | |
1017 | 0, /* src_mask */ | |
1018 | 0xfffc, /* dst_mask */ | |
1019 | false), /* pcrel_offset */ | |
1020 | ||
1021 | /* Like R_PPC64_GOT16, but for instructions with a DS field. */ | |
1022 | HOWTO (R_PPC64_GOT16_DS, /* type */ | |
1023 | 0, /* rightshift */ | |
1024 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1025 | 16, /* bitsize */ | |
1026 | false, /* pc_relative */ | |
1027 | 0, /* bitpos */ | |
1028 | complain_overflow_signed, /* complain_on_overflow */ | |
805fc799 | 1029 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
1030 | "R_PPC64_GOT16_DS", /* name */ |
1031 | false, /* partial_inplace */ | |
1032 | 0, /* src_mask */ | |
1033 | 0xfffc, /* dst_mask */ | |
1034 | false), /* pcrel_offset */ | |
1035 | ||
1036 | /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ | |
1037 | HOWTO (R_PPC64_GOT16_LO_DS, /* type */ | |
1038 | 0, /* rightshift */ | |
1039 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1040 | 16, /* bitsize */ | |
1041 | false, /* pc_relative */ | |
1042 | 0, /* bitpos */ | |
1043 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 1044 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
1045 | "R_PPC64_GOT16_LO_DS", /* name */ |
1046 | false, /* partial_inplace */ | |
1047 | 0, /* src_mask */ | |
1048 | 0xfffc, /* dst_mask */ | |
1049 | false), /* pcrel_offset */ | |
1050 | ||
1051 | /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ | |
1052 | HOWTO (R_PPC64_PLT16_LO_DS, /* type */ | |
1053 | 0, /* rightshift */ | |
1054 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1055 | 16, /* bitsize */ | |
1056 | false, /* pc_relative */ | |
1057 | 0, /* bitpos */ | |
1058 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 1059 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
1060 | "R_PPC64_PLT16_LO_DS", /* name */ |
1061 | false, /* partial_inplace */ | |
1062 | 0, /* src_mask */ | |
1063 | 0xfffc, /* dst_mask */ | |
1064 | false), /* pcrel_offset */ | |
1065 | ||
1066 | /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ | |
5bd4f169 AM |
1067 | HOWTO (R_PPC64_SECTOFF_DS, /* type */ |
1068 | 0, /* rightshift */ | |
c061c2d8 AM |
1069 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
1070 | 16, /* bitsize */ | |
805fc799 | 1071 | false, /* pc_relative */ |
5bd4f169 AM |
1072 | 0, /* bitpos */ |
1073 | complain_overflow_bitfield, /* complain_on_overflow */ | |
805fc799 | 1074 | ppc64_elf_sectoff_reloc, /* special_function */ |
5bd4f169 AM |
1075 | "R_PPC64_SECTOFF_DS", /* name */ |
1076 | false, /* partial_inplace */ | |
1077 | 0, /* src_mask */ | |
c061c2d8 | 1078 | 0xfffc, /* dst_mask */ |
805fc799 | 1079 | false), /* pcrel_offset */ |
5bd4f169 AM |
1080 | |
1081 | /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ | |
1082 | HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */ | |
1083 | 0, /* rightshift */ | |
1084 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1085 | 16, /* bitsize */ | |
1086 | false, /* pc_relative */ | |
1087 | 0, /* bitpos */ | |
1088 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 1089 | ppc64_elf_sectoff_reloc, /* special_function */ |
5bd4f169 AM |
1090 | "R_PPC64_SECTOFF_LO_DS",/* name */ |
1091 | false, /* partial_inplace */ | |
1092 | 0, /* src_mask */ | |
1093 | 0xfffc, /* dst_mask */ | |
1094 | false), /* pcrel_offset */ | |
1095 | ||
1096 | /* Like R_PPC64_TOC16, but for instructions with a DS field. */ | |
1097 | HOWTO (R_PPC64_TOC16_DS, /* type */ | |
1098 | 0, /* rightshift */ | |
1099 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1100 | 16, /* bitsize */ | |
1101 | false, /* pc_relative */ | |
1102 | 0, /* bitpos */ | |
1103 | complain_overflow_signed, /* complain_on_overflow */ | |
805fc799 | 1104 | ppc64_elf_toc_reloc, /* special_function */ |
5bd4f169 AM |
1105 | "R_PPC64_TOC16_DS", /* name */ |
1106 | false, /* partial_inplace */ | |
1107 | 0, /* src_mask */ | |
1108 | 0xfffc, /* dst_mask */ | |
1109 | false), /* pcrel_offset */ | |
1110 | ||
1111 | /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ | |
1112 | HOWTO (R_PPC64_TOC16_LO_DS, /* type */ | |
1113 | 0, /* rightshift */ | |
1114 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1115 | 16, /* bitsize */ | |
1116 | false, /* pc_relative */ | |
1117 | 0, /* bitpos */ | |
1118 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 1119 | ppc64_elf_toc_reloc, /* special_function */ |
5bd4f169 AM |
1120 | "R_PPC64_TOC16_LO_DS", /* name */ |
1121 | false, /* partial_inplace */ | |
1122 | 0, /* src_mask */ | |
1123 | 0xfffc, /* dst_mask */ | |
1124 | false), /* pcrel_offset */ | |
1125 | ||
1126 | /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ | |
1127 | /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ | |
1128 | HOWTO (R_PPC64_PLTGOT16_DS, /* type */ | |
1129 | 0, /* rightshift */ | |
1130 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1131 | 16, /* bitsize */ | |
1132 | false, /* pc_relative */ | |
1133 | 0, /* bitpos */ | |
1134 | complain_overflow_signed, /* complain_on_overflow */ | |
805fc799 | 1135 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
1136 | "R_PPC64_PLTGOT16_DS", /* name */ |
1137 | false, /* partial_inplace */ | |
1138 | 0, /* src_mask */ | |
1139 | 0xfffc, /* dst_mask */ | |
1140 | false), /* pcrel_offset */ | |
1141 | ||
1142 | /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ | |
1143 | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ | |
1144 | HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */ | |
1145 | 0, /* rightshift */ | |
1146 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1147 | 16, /* bitsize */ | |
1148 | false, /* pc_relative */ | |
1149 | 0, /* bitpos */ | |
1150 | complain_overflow_dont, /* complain_on_overflow */ | |
805fc799 | 1151 | ppc64_elf_unhandled_reloc, /* special_function */ |
5bd4f169 AM |
1152 | "R_PPC64_PLTGOT16_LO_DS",/* name */ |
1153 | false, /* partial_inplace */ | |
1154 | 0, /* src_mask */ | |
1155 | 0xfffc, /* dst_mask */ | |
1156 | false), /* pcrel_offset */ | |
1157 | ||
1158 | /* GNU extension to record C++ vtable hierarchy. */ | |
1159 | HOWTO (R_PPC64_GNU_VTINHERIT, /* type */ | |
1160 | 0, /* rightshift */ | |
1161 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
1162 | 0, /* bitsize */ | |
1163 | false, /* pc_relative */ | |
1164 | 0, /* bitpos */ | |
1165 | complain_overflow_dont, /* complain_on_overflow */ | |
1166 | NULL, /* special_function */ | |
1167 | "R_PPC64_GNU_VTINHERIT", /* name */ | |
1168 | false, /* partial_inplace */ | |
1169 | 0, /* src_mask */ | |
1170 | 0, /* dst_mask */ | |
1171 | false), /* pcrel_offset */ | |
1172 | ||
1173 | /* GNU extension to record C++ vtable member usage. */ | |
1174 | HOWTO (R_PPC64_GNU_VTENTRY, /* type */ | |
1175 | 0, /* rightshift */ | |
1176 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
1177 | 0, /* bitsize */ | |
1178 | false, /* pc_relative */ | |
1179 | 0, /* bitpos */ | |
1180 | complain_overflow_dont, /* complain_on_overflow */ | |
1181 | NULL, /* special_function */ | |
1182 | "R_PPC64_GNU_VTENTRY", /* name */ | |
1183 | false, /* partial_inplace */ | |
1184 | 0, /* src_mask */ | |
1185 | 0, /* dst_mask */ | |
1186 | false), /* pcrel_offset */ | |
1187 | }; | |
1188 | ||
1189 | \f | |
1190 | /* Initialize the ppc64_elf_howto_table, so that linear accesses can | |
1191 | be done. */ | |
1192 | ||
1193 | static void | |
1194 | ppc_howto_init () | |
1195 | { | |
1196 | unsigned int i, type; | |
1197 | ||
1198 | for (i = 0; | |
1199 | i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); | |
1200 | i++) | |
1201 | { | |
1202 | type = ppc64_elf_howto_raw[i].type; | |
1203 | BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) | |
1204 | / sizeof (ppc64_elf_howto_table[0]))); | |
1205 | ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; | |
1206 | } | |
1207 | } | |
1208 | ||
1209 | static reloc_howto_type * | |
1210 | ppc64_elf_reloc_type_lookup (abfd, code) | |
1211 | bfd *abfd ATTRIBUTE_UNUSED; | |
1212 | bfd_reloc_code_real_type code; | |
1213 | { | |
1214 | enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE; | |
1215 | ||
1216 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) | |
1217 | /* Initialize howto table if needed. */ | |
1218 | ppc_howto_init (); | |
1219 | ||
1220 | switch ((int) code) | |
1221 | { | |
1222 | default: | |
1223 | return (reloc_howto_type *) NULL; | |
1224 | ||
1225 | case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE; | |
1226 | break; | |
1227 | case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32; | |
1228 | break; | |
1229 | case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24; | |
1230 | break; | |
1231 | case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16; | |
1232 | break; | |
1233 | case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO; | |
1234 | break; | |
1235 | case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI; | |
1236 | break; | |
1237 | case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA; | |
1238 | break; | |
1239 | case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14; | |
1240 | break; | |
1241 | case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN; | |
1242 | break; | |
1243 | case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN; | |
1244 | break; | |
1245 | case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24; | |
1246 | break; | |
1247 | case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14; | |
1248 | break; | |
1249 | case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN; | |
1250 | break; | |
1251 | case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN; | |
1252 | break; | |
1253 | case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16; | |
1254 | break; | |
1255 | case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO; | |
1256 | break; | |
1257 | case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI; | |
1258 | break; | |
1259 | case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA; | |
1260 | break; | |
1261 | case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY; | |
1262 | break; | |
1263 | case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT; | |
1264 | break; | |
1265 | case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32; | |
1266 | break; | |
1267 | case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32; | |
1268 | break; | |
1269 | case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32; | |
1270 | break; | |
1271 | case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO; | |
1272 | break; | |
1273 | case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI; | |
1274 | break; | |
1275 | case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA; | |
1276 | break; | |
c061c2d8 | 1277 | case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC64_SECTOFF; |
5bd4f169 AM |
1278 | break; |
1279 | case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO; | |
1280 | break; | |
1281 | case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI; | |
1282 | break; | |
1283 | case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA; | |
1284 | break; | |
10ed1bba | 1285 | case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64; |
5bd4f169 AM |
1286 | break; |
1287 | case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64; | |
1288 | break; | |
1289 | case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER; | |
1290 | break; | |
1291 | case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA; | |
1292 | break; | |
1293 | case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST; | |
1294 | break; | |
1295 | case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA; | |
1296 | break; | |
1297 | case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64; | |
1298 | break; | |
1299 | case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64; | |
1300 | break; | |
1301 | case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64; | |
1302 | break; | |
1303 | case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16; | |
1304 | break; | |
1305 | case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO; | |
1306 | break; | |
1307 | case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI; | |
1308 | break; | |
1309 | case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA; | |
1310 | break; | |
1311 | case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC; | |
1312 | break; | |
1313 | case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16; | |
1314 | break; | |
1315 | case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO; | |
1316 | break; | |
1317 | case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI; | |
1318 | break; | |
1319 | case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA; | |
1320 | break; | |
1321 | case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS; | |
1322 | break; | |
1323 | case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS; | |
1324 | break; | |
1325 | case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS; | |
1326 | break; | |
1327 | case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS; | |
1328 | break; | |
1329 | case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS; | |
1330 | break; | |
1331 | case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS; | |
1332 | break; | |
1333 | case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS; | |
1334 | break; | |
1335 | case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS; | |
1336 | break; | |
1337 | case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS; | |
1338 | break; | |
1339 | case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS; | |
1340 | break; | |
1341 | case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS; | |
1342 | break; | |
1343 | case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT; | |
1344 | break; | |
1345 | case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY; | |
1346 | break; | |
1347 | } | |
1348 | ||
1349 | return ppc64_elf_howto_table[(int) ppc_reloc]; | |
1350 | }; | |
1351 | ||
1352 | /* Set the howto pointer for a PowerPC ELF reloc. */ | |
1353 | ||
1354 | static void | |
1355 | ppc64_elf_info_to_howto (abfd, cache_ptr, dst) | |
1356 | bfd *abfd ATTRIBUTE_UNUSED; | |
1357 | arelent *cache_ptr; | |
1358 | Elf64_Internal_Rela *dst; | |
1359 | { | |
65f38f15 AM |
1360 | unsigned int type; |
1361 | ||
ef60b7ff | 1362 | /* Initialize howto table if needed. */ |
5bd4f169 | 1363 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
5bd4f169 AM |
1364 | ppc_howto_init (); |
1365 | ||
65f38f15 AM |
1366 | type = ELF64_R_TYPE (dst->r_info); |
1367 | BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) | |
1368 | / sizeof (ppc64_elf_howto_table[0]))); | |
1369 | cache_ptr->howto = ppc64_elf_howto_table[type]; | |
5bd4f169 AM |
1370 | } |
1371 | ||
65f38f15 | 1372 | /* Handle the R_PPC_ADDR16_HA and similar relocs. */ |
5bd4f169 AM |
1373 | |
1374 | static bfd_reloc_status_type | |
805fc799 AM |
1375 | ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data, |
1376 | input_section, output_bfd, error_message) | |
1377 | bfd *abfd; | |
5bd4f169 AM |
1378 | arelent *reloc_entry; |
1379 | asymbol *symbol; | |
805fc799 | 1380 | PTR data; |
5bd4f169 AM |
1381 | asection *input_section; |
1382 | bfd *output_bfd; | |
805fc799 | 1383 | char **error_message; |
5bd4f169 | 1384 | { |
805fc799 AM |
1385 | /* If this is a relocatable link (output_bfd test tells us), just |
1386 | call the generic function. Any adjustment will be done at final | |
1387 | link time. */ | |
1388 | if (output_bfd != NULL) | |
1389 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1390 | input_section, output_bfd, error_message); | |
1391 | ||
1392 | /* Adjust the addend for sign extension of the low 16 bits. | |
1393 | We won't actually be using the low 16 bits, so trashing them | |
1394 | doesn't matter. */ | |
1395 | reloc_entry->addend += 0x8000; | |
1396 | return bfd_reloc_continue; | |
1397 | } | |
5bd4f169 | 1398 | |
805fc799 AM |
1399 | static bfd_reloc_status_type |
1400 | ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data, | |
1401 | input_section, output_bfd, error_message) | |
1402 | bfd *abfd; | |
1403 | arelent *reloc_entry; | |
1404 | asymbol *symbol; | |
1405 | PTR data; | |
1406 | asection *input_section; | |
1407 | bfd *output_bfd; | |
1408 | char **error_message; | |
1409 | { | |
1410 | long insn; | |
1411 | enum elf_ppc_reloc_type r_type; | |
1412 | bfd_size_type octets; | |
1413 | /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ | |
1414 | boolean is_power4 = false; | |
1415 | ||
1416 | /* If this is a relocatable link (output_bfd test tells us), just | |
1417 | call the generic function. Any adjustment will be done at final | |
1418 | link time. */ | |
5bd4f169 | 1419 | if (output_bfd != NULL) |
805fc799 AM |
1420 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1421 | input_section, output_bfd, error_message); | |
1422 | ||
1423 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
1424 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); | |
1425 | insn &= ~(0x01 << 21); | |
1426 | r_type = (enum elf_ppc_reloc_type) reloc_entry->howto->type; | |
1427 | if (r_type == R_PPC64_ADDR14_BRTAKEN | |
1428 | || r_type == R_PPC64_REL14_BRTAKEN) | |
1429 | insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ | |
1430 | ||
1431 | if (is_power4) | |
5bd4f169 | 1432 | { |
805fc799 AM |
1433 | /* Set 'a' bit. This is 0b00010 in BO field for branch |
1434 | on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
1435 | for branch on CTR insns (BO == 1a00t or 1a01t). */ | |
1436 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
1437 | insn |= 0x02 << 21; | |
1438 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
1439 | insn |= 0x08 << 21; | |
1440 | else | |
1441 | return bfd_reloc_continue; | |
5bd4f169 | 1442 | } |
805fc799 AM |
1443 | else |
1444 | { | |
1445 | bfd_vma target = 0; | |
1446 | bfd_vma from; | |
5bd4f169 | 1447 | |
805fc799 AM |
1448 | if (!bfd_is_com_section (symbol->section)) |
1449 | target = symbol->value; | |
1450 | target += symbol->section->output_section->vma; | |
1451 | target += symbol->section->output_offset; | |
1452 | target += reloc_entry->addend; | |
5bd4f169 | 1453 | |
805fc799 AM |
1454 | from = (reloc_entry->address |
1455 | + input_section->output_offset | |
1456 | + input_section->output_section->vma); | |
5bd4f169 | 1457 | |
805fc799 AM |
1458 | /* Invert 'y' bit if not the default. */ |
1459 | if ((bfd_signed_vma) (target - from) < 0) | |
1460 | insn ^= 0x01 << 21; | |
1461 | } | |
1462 | bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets); | |
1463 | return bfd_reloc_continue; | |
1464 | } | |
5bd4f169 | 1465 | |
805fc799 AM |
1466 | static bfd_reloc_status_type |
1467 | ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data, | |
1468 | input_section, output_bfd, error_message) | |
1469 | bfd *abfd; | |
1470 | arelent *reloc_entry; | |
1471 | asymbol *symbol; | |
1472 | PTR data; | |
1473 | asection *input_section; | |
1474 | bfd *output_bfd; | |
1475 | char **error_message; | |
1476 | { | |
1477 | /* If this is a relocatable link (output_bfd test tells us), just | |
1478 | call the generic function. Any adjustment will be done at final | |
1479 | link time. */ | |
1480 | if (output_bfd != NULL) | |
1481 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1482 | input_section, output_bfd, error_message); | |
5bd4f169 | 1483 | |
805fc799 AM |
1484 | /* Subtract the symbol section base address. */ |
1485 | reloc_entry->addend -= symbol->section->output_section->vma; | |
5bd4f169 AM |
1486 | return bfd_reloc_continue; |
1487 | } | |
1488 | ||
805fc799 AM |
1489 | static bfd_reloc_status_type |
1490 | ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data, | |
1491 | input_section, output_bfd, error_message) | |
1492 | bfd *abfd; | |
1493 | arelent *reloc_entry; | |
1494 | asymbol *symbol; | |
1495 | PTR data; | |
1496 | asection *input_section; | |
1497 | bfd *output_bfd; | |
1498 | char **error_message; | |
1499 | { | |
1500 | /* If this is a relocatable link (output_bfd test tells us), just | |
1501 | call the generic function. Any adjustment will be done at final | |
1502 | link time. */ | |
1503 | if (output_bfd != NULL) | |
1504 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1505 | input_section, output_bfd, error_message); | |
1506 | ||
1507 | /* Subtract the symbol section base address. */ | |
1508 | reloc_entry->addend -= symbol->section->output_section->vma; | |
1509 | ||
1510 | /* Adjust the addend for sign extension of the low 16 bits. */ | |
1511 | reloc_entry->addend += 0x8000; | |
1512 | return bfd_reloc_continue; | |
1513 | } | |
1514 | ||
1515 | static bfd_reloc_status_type | |
1516 | ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data, | |
1517 | input_section, output_bfd, error_message) | |
1518 | bfd *abfd; | |
1519 | arelent *reloc_entry; | |
1520 | asymbol *symbol; | |
1521 | PTR data; | |
1522 | asection *input_section; | |
1523 | bfd *output_bfd; | |
1524 | char **error_message; | |
1525 | { | |
1526 | bfd_vma TOCstart; | |
1527 | ||
1528 | /* If this is a relocatable link (output_bfd test tells us), just | |
1529 | call the generic function. Any adjustment will be done at final | |
1530 | link time. */ | |
1531 | if (output_bfd != NULL) | |
1532 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1533 | input_section, output_bfd, error_message); | |
1534 | ||
1535 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); | |
1536 | if (TOCstart == 0) | |
1537 | TOCstart = ppc64_elf_toc (input_section->output_section->owner); | |
1538 | ||
1539 | /* Subtract the TOC base address. */ | |
1540 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; | |
1541 | return bfd_reloc_continue; | |
1542 | } | |
1543 | ||
1544 | static bfd_reloc_status_type | |
1545 | ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data, | |
1546 | input_section, output_bfd, error_message) | |
1547 | bfd *abfd; | |
1548 | arelent *reloc_entry; | |
1549 | asymbol *symbol; | |
1550 | PTR data; | |
1551 | asection *input_section; | |
1552 | bfd *output_bfd; | |
1553 | char **error_message; | |
1554 | { | |
1555 | bfd_vma TOCstart; | |
1556 | ||
1557 | /* If this is a relocatable link (output_bfd test tells us), just | |
1558 | call the generic function. Any adjustment will be done at final | |
1559 | link time. */ | |
1560 | if (output_bfd != NULL) | |
1561 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1562 | input_section, output_bfd, error_message); | |
1563 | ||
1564 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); | |
1565 | if (TOCstart == 0) | |
1566 | TOCstart = ppc64_elf_toc (input_section->output_section->owner); | |
1567 | ||
1568 | /* Subtract the TOC base address. */ | |
1569 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; | |
1570 | ||
1571 | /* Adjust the addend for sign extension of the low 16 bits. */ | |
1572 | reloc_entry->addend += 0x8000; | |
1573 | return bfd_reloc_continue; | |
1574 | } | |
1575 | ||
1576 | static bfd_reloc_status_type | |
1577 | ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data, | |
1578 | input_section, output_bfd, error_message) | |
1579 | bfd *abfd; | |
1580 | arelent *reloc_entry; | |
1581 | asymbol *symbol; | |
1582 | PTR data; | |
1583 | asection *input_section; | |
1584 | bfd *output_bfd; | |
1585 | char **error_message; | |
1586 | { | |
1587 | bfd_vma TOCstart; | |
1588 | bfd_size_type octets; | |
1589 | ||
1590 | /* If this is a relocatable link (output_bfd test tells us), just | |
1591 | call the generic function. Any adjustment will be done at final | |
1592 | link time. */ | |
1593 | if (output_bfd != NULL) | |
1594 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1595 | input_section, output_bfd, error_message); | |
1596 | ||
1597 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); | |
1598 | if (TOCstart == 0) | |
1599 | TOCstart = ppc64_elf_toc (input_section->output_section->owner); | |
1600 | ||
1601 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
1602 | bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); | |
1603 | return bfd_reloc_ok; | |
1604 | } | |
1605 | ||
1606 | static bfd_reloc_status_type | |
1607 | ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data, | |
1608 | input_section, output_bfd, error_message) | |
1609 | bfd *abfd; | |
1610 | arelent *reloc_entry; | |
1611 | asymbol *symbol; | |
1612 | PTR data; | |
1613 | asection *input_section; | |
1614 | bfd *output_bfd; | |
1615 | char **error_message; | |
1616 | { | |
1617 | /* If this is a relocatable link (output_bfd test tells us), just | |
1618 | call the generic function. Any adjustment will be done at final | |
1619 | link time. */ | |
1620 | if (output_bfd != NULL) | |
1621 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1622 | input_section, output_bfd, error_message); | |
1623 | ||
1624 | if (error_message != NULL) | |
1625 | { | |
1626 | static char buf[60]; | |
1627 | sprintf (buf, "generic linker can't handle %s", | |
1628 | reloc_entry->howto->name); | |
1629 | *error_message = buf; | |
1630 | } | |
1631 | return bfd_reloc_dangerous; | |
1632 | } | |
1633 | ||
5bd4f169 AM |
1634 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
1635 | ||
1636 | static boolean | |
1637 | ppc64_elf_set_private_flags (abfd, flags) | |
1638 | bfd *abfd; | |
1639 | flagword flags; | |
1640 | { | |
1641 | BFD_ASSERT (!elf_flags_init (abfd) | |
1642 | || elf_elfheader (abfd)->e_flags == flags); | |
1643 | ||
1644 | elf_elfheader (abfd)->e_flags = flags; | |
1645 | elf_flags_init (abfd) = true; | |
1646 | return true; | |
1647 | } | |
1648 | ||
5bd4f169 AM |
1649 | /* Merge backend specific data from an object file to the output |
1650 | object file when linking. */ | |
1651 | static boolean | |
1652 | ppc64_elf_merge_private_bfd_data (ibfd, obfd) | |
1653 | bfd *ibfd; | |
1654 | bfd *obfd; | |
1655 | { | |
1656 | flagword old_flags; | |
1657 | flagword new_flags; | |
1658 | boolean error; | |
1659 | ||
1660 | /* Check if we have the same endianess. */ | |
1661 | if (ibfd->xvec->byteorder != obfd->xvec->byteorder | |
1662 | && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) | |
1663 | { | |
1664 | const char *msg; | |
1665 | ||
1666 | if (bfd_big_endian (ibfd)) | |
1667 | msg = _("%s: compiled for a big endian system and target is little endian"); | |
1668 | else | |
1669 | msg = _("%s: compiled for a little endian system and target is big endian"); | |
1670 | ||
8f615d07 | 1671 | (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd)); |
5bd4f169 AM |
1672 | |
1673 | bfd_set_error (bfd_error_wrong_format); | |
1674 | return false; | |
1675 | } | |
1676 | ||
1677 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1678 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1679 | return true; | |
1680 | ||
1681 | new_flags = elf_elfheader (ibfd)->e_flags; | |
1682 | old_flags = elf_elfheader (obfd)->e_flags; | |
1683 | if (!elf_flags_init (obfd)) | |
1684 | { | |
1685 | /* First call, no flags set. */ | |
1686 | elf_flags_init (obfd) = true; | |
1687 | elf_elfheader (obfd)->e_flags = new_flags; | |
1688 | } | |
1689 | ||
1690 | else if (new_flags == old_flags) | |
1691 | /* Compatible flags are ok. */ | |
1692 | ; | |
1693 | ||
1694 | else | |
1695 | { | |
1696 | /* Incompatible flags. Warn about -mrelocatable mismatch. | |
1697 | Allow -mrelocatable-lib to be linked with either. */ | |
1698 | error = false; | |
1699 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 | |
1700 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) | |
1701 | { | |
1702 | error = true; | |
1703 | (*_bfd_error_handler) | |
1704 | (_("%s: compiled with -mrelocatable and linked with modules compiled normally"), | |
8f615d07 | 1705 | bfd_archive_filename (ibfd)); |
5bd4f169 AM |
1706 | } |
1707 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 | |
1708 | && (old_flags & EF_PPC_RELOCATABLE) != 0) | |
1709 | { | |
1710 | error = true; | |
1711 | (*_bfd_error_handler) | |
1712 | (_("%s: compiled normally and linked with modules compiled with -mrelocatable"), | |
8f615d07 | 1713 | bfd_archive_filename (ibfd)); |
5bd4f169 AM |
1714 | } |
1715 | ||
1716 | /* The output is -mrelocatable-lib iff both the input files are. */ | |
1717 | if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) | |
1718 | elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; | |
1719 | ||
1720 | /* The output is -mrelocatable iff it can't be -mrelocatable-lib, | |
1721 | but each input file is either -mrelocatable or -mrelocatable-lib. */ | |
1722 | if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) | |
1723 | && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) | |
1724 | && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) | |
1725 | elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; | |
1726 | ||
1727 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit | |
1728 | if any module uses it. */ | |
1729 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); | |
1730 | ||
1731 | new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); | |
1732 | old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); | |
1733 | ||
1734 | /* Warn about any other mismatches. */ | |
1735 | if (new_flags != old_flags) | |
1736 | { | |
1737 | error = true; | |
1738 | (*_bfd_error_handler) | |
1739 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), | |
8f615d07 | 1740 | bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags); |
5bd4f169 AM |
1741 | } |
1742 | ||
1743 | if (error) | |
1744 | { | |
1745 | bfd_set_error (bfd_error_bad_value); | |
1746 | return false; | |
1747 | } | |
1748 | } | |
1749 | ||
1750 | return true; | |
1751 | } | |
1752 | ||
1753 | /* Handle a PowerPC specific section when reading an object file. This | |
1754 | is called when elfcode.h finds a section with an unknown type. */ | |
1755 | ||
1756 | static boolean | |
1757 | ppc64_elf_section_from_shdr (abfd, hdr, name) | |
1758 | bfd *abfd; | |
1759 | Elf64_Internal_Shdr *hdr; | |
1760 | char *name; | |
1761 | { | |
1762 | asection *newsect; | |
1763 | flagword flags; | |
1764 | ||
1765 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) | |
1766 | return false; | |
1767 | ||
1768 | newsect = hdr->bfd_section; | |
1769 | flags = bfd_get_section_flags (abfd, newsect); | |
1770 | if (hdr->sh_flags & SHF_EXCLUDE) | |
1771 | flags |= SEC_EXCLUDE; | |
1772 | ||
1773 | if (hdr->sh_type == SHT_ORDERED) | |
1774 | flags |= SEC_SORT_ENTRIES; | |
1775 | ||
1776 | bfd_set_section_flags (abfd, newsect, flags); | |
1777 | return true; | |
1778 | } | |
1779 | \f | |
65f38f15 AM |
1780 | /* The following functions are specific to the ELF linker, while |
1781 | functions above are used generally. Those named ppc64_elf_* are | |
1782 | called by the main ELF linker code. They appear in this file more | |
1783 | or less in the order in which they are called. eg. | |
1784 | ppc64_elf_check_relocs is called early in the link process, | |
1785 | ppc64_elf_finish_dynamic_sections is one of the last functions | |
e86ce104 AM |
1786 | called. |
1787 | ||
1788 | PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that | |
1789 | functions have both a function code symbol and a function descriptor | |
1790 | symbol. A call to foo in a relocatable object file looks like: | |
1791 | ||
1792 | . .text | |
1793 | . x: | |
1794 | . bl .foo | |
1795 | . nop | |
1796 | ||
1797 | The function definition in another object file might be: | |
1798 | ||
1799 | . .section .opd | |
1800 | . foo: .quad .foo | |
1801 | . .quad .TOC.@tocbase | |
1802 | . .quad 0 | |
1803 | . | |
1804 | . .text | |
1805 | . .foo: blr | |
1806 | ||
1807 | When the linker resolves the call during a static link, the branch | |
1808 | unsurprisingly just goes to .foo and the .opd information is unused. | |
1809 | If the function definition is in a shared library, things are a little | |
1810 | different: The call goes via a plt call stub, the opd information gets | |
1811 | copied to the plt, and the linker patches the nop. | |
1812 | ||
1813 | . x: | |
1814 | . bl .foo_stub | |
1815 | . ld 2,40(1) | |
1816 | . | |
1817 | . | |
1818 | . .foo_stub: | |
1819 | . addis 12,2,Lfoo@toc@ha # in practice, the call stub | |
1820 | . addi 12,12,Lfoo@toc@l # is slightly optimised, but | |
1821 | . std 2,40(1) # this is the general idea | |
1822 | . ld 11,0(12) | |
1823 | . ld 2,8(12) | |
1824 | . mtctr 11 | |
1825 | . ld 11,16(12) | |
1826 | . bctr | |
1827 | . | |
1828 | . .section .plt | |
1829 | . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) | |
1830 | ||
1831 | The "reloc ()" notation is supposed to indicate that the linker emits | |
1832 | an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd | |
1833 | copying. | |
1834 | ||
1835 | What are the difficulties here? Well, firstly, the relocations | |
1836 | examined by the linker in check_relocs are against the function code | |
1837 | sym .foo, while the dynamic relocation in the plt is emitted against | |
1838 | the function descriptor symbol, foo. Somewhere along the line, we need | |
1839 | to carefully copy dynamic link information from one symbol to the other. | |
1840 | Secondly, the generic part of the elf linker will make .foo a dynamic | |
1841 | symbol as is normal for most other backends. We need foo dynamic | |
1842 | instead, at least for an application final link. However, when | |
1843 | creating a shared library containing foo, we need to have both symbols | |
1844 | dynamic so that references to .foo are satisfied during the early | |
1845 | stages of linking. Otherwise the linker might decide to pull in a | |
41bd81ab | 1846 | definition from some other object, eg. a static library. */ |
65f38f15 AM |
1847 | |
1848 | /* The linker needs to keep track of the number of relocs that it | |
1849 | decides to copy as dynamic relocs in check_relocs for each symbol. | |
1850 | This is so that it can later discard them if they are found to be | |
1851 | unnecessary. We store the information in a field extending the | |
1852 | regular ELF linker hash table. */ | |
1853 | ||
1854 | struct ppc_dyn_relocs | |
1855 | { | |
1856 | struct ppc_dyn_relocs *next; | |
1857 | ||
1858 | /* The input section of the reloc. */ | |
1859 | asection *sec; | |
1860 | ||
1861 | /* Total number of relocs copied for the input section. */ | |
1862 | bfd_size_type count; | |
1863 | ||
1864 | /* Number of pc-relative relocs copied for the input section. */ | |
1865 | bfd_size_type pc_count; | |
1866 | }; | |
1867 | ||
1868 | /* Of those relocs that might be copied as dynamic relocs, this macro | |
1869 | selects between relative and absolute types. */ | |
1870 | ||
1871 | #define IS_ABSOLUTE_RELOC(RTYPE) \ | |
805fc799 AM |
1872 | ((RTYPE) != R_PPC64_REL32 \ |
1873 | && (RTYPE) != R_PPC64_REL64 \ | |
1874 | && (RTYPE) != R_PPC64_ADDR30) | |
65f38f15 | 1875 | |
721956f4 AM |
1876 | /* Section name for stubs is the associated section name plus this |
1877 | string. */ | |
1878 | #define STUB_SUFFIX ".stub" | |
1879 | ||
1880 | /* Linker stubs. | |
1881 | ppc_stub_long_branch: | |
1882 | Used when a 14 bit branch (or even a 24 bit branch) can't reach its | |
1883 | destination, but a 24 bit branch in a stub section will reach. | |
1884 | . b dest | |
1885 | ||
1886 | ppc_stub_plt_branch: | |
1887 | Similar to the above, but a 24 bit branch in the stub section won't | |
1888 | reach its destination. | |
1889 | . addis %r12,%r2,xxx@ha | |
1890 | . ld %r11,xxx@l(%r12) | |
1891 | . mtctr %r11 | |
1892 | . bctr | |
1893 | ||
1894 | ppc_stub_plt_call: | |
1895 | Used to call a function in a shared library. | |
1896 | . addis %r12,%r2,xxx@ha | |
1897 | . std %r2,40(%r1) | |
1898 | . ld %r11,xxx+0@l(%r12) | |
1899 | . ld %r2,xxx+8@l(%r12) | |
1900 | . mtctr %r11 | |
1901 | . ld %r11,xxx+16@l(%r12) | |
1902 | . bctr | |
1903 | */ | |
1904 | ||
1905 | enum ppc_stub_type { | |
1906 | ppc_stub_none, | |
1907 | ppc_stub_long_branch, | |
1908 | ppc_stub_plt_branch, | |
1909 | ppc_stub_plt_call | |
1910 | }; | |
1911 | ||
1912 | struct ppc_stub_hash_entry { | |
1913 | ||
1914 | /* Base hash table entry structure. */ | |
1915 | struct bfd_hash_entry root; | |
1916 | ||
1917 | /* The stub section. */ | |
1918 | asection *stub_sec; | |
1919 | ||
1920 | /* Offset within stub_sec of the beginning of this stub. */ | |
1921 | bfd_vma stub_offset; | |
1922 | ||
1923 | /* Given the symbol's value and its section we can determine its final | |
1924 | value when building the stubs (so the stub knows where to jump. */ | |
1925 | bfd_vma target_value; | |
1926 | asection *target_section; | |
1927 | ||
1928 | enum ppc_stub_type stub_type; | |
1929 | ||
1930 | /* The symbol table entry, if any, that this was derived from. */ | |
1931 | struct ppc_link_hash_entry *h; | |
1932 | ||
1933 | /* Where this stub is being called from, or, in the case of combined | |
1934 | stub sections, the first input section in the group. */ | |
1935 | asection *id_sec; | |
1936 | }; | |
1937 | ||
1938 | struct ppc_branch_hash_entry { | |
1939 | ||
1940 | /* Base hash table entry structure. */ | |
1941 | struct bfd_hash_entry root; | |
1942 | ||
1943 | /* Offset within .branch_lt. */ | |
1944 | unsigned int offset; | |
1945 | ||
1946 | /* Generation marker. */ | |
1947 | unsigned int iter; | |
1948 | }; | |
65f38f15 AM |
1949 | |
1950 | struct ppc_link_hash_entry | |
1951 | { | |
1952 | struct elf_link_hash_entry elf; | |
1953 | ||
721956f4 AM |
1954 | /* A pointer to the most recently used stub hash entry against this |
1955 | symbol. */ | |
1956 | struct ppc_stub_hash_entry *stub_cache; | |
1957 | ||
65f38f15 AM |
1958 | /* Track dynamic relocs copied for this symbol. */ |
1959 | struct ppc_dyn_relocs *dyn_relocs; | |
e86ce104 | 1960 | |
721956f4 AM |
1961 | /* Link between function code and descriptor symbols. */ |
1962 | struct elf_link_hash_entry *oh; | |
1963 | ||
e86ce104 AM |
1964 | /* Flag function code and descriptor symbols. */ |
1965 | unsigned int is_func:1; | |
1966 | unsigned int is_func_descriptor:1; | |
65f38f15 AM |
1967 | }; |
1968 | ||
1969 | /* ppc64 ELF linker hash table. */ | |
1970 | ||
1971 | struct ppc_link_hash_table | |
1972 | { | |
1973 | struct elf_link_hash_table elf; | |
1974 | ||
721956f4 AM |
1975 | /* The stub hash table. */ |
1976 | struct bfd_hash_table stub_hash_table; | |
1977 | ||
1978 | /* Another hash table for plt_branch stubs. */ | |
1979 | struct bfd_hash_table branch_hash_table; | |
1980 | ||
1981 | /* Linker stub bfd. */ | |
1982 | bfd *stub_bfd; | |
1983 | ||
1984 | /* Linker call-backs. */ | |
1985 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); | |
1986 | void (*layout_sections_again) PARAMS ((void)); | |
1987 | ||
1988 | /* Array to keep track of which stub sections have been created, and | |
1989 | information on stub grouping. */ | |
1990 | struct map_stub { | |
1991 | /* This is the section to which stubs in the group will be attached. */ | |
1992 | asection *link_sec; | |
1993 | /* The stub section. */ | |
1994 | asection *stub_sec; | |
1995 | } *stub_group; | |
1996 | ||
1997 | /* Assorted information used by ppc64_elf_size_stubs. */ | |
1998 | unsigned int bfd_count; | |
1999 | int top_index; | |
2000 | asection **input_list; | |
2001 | Elf_Internal_Sym **all_local_syms; | |
2002 | ||
65f38f15 AM |
2003 | /* Short-cuts to get to dynamic linker sections. */ |
2004 | asection *sgot; | |
2005 | asection *srelgot; | |
2006 | asection *splt; | |
2007 | asection *srelplt; | |
2008 | asection *sdynbss; | |
2009 | asection *srelbss; | |
2010 | asection *sglink; | |
82bd7b59 | 2011 | asection *sfpr; |
721956f4 AM |
2012 | asection *sbrlt; |
2013 | asection *srelbrlt; | |
ec338859 | 2014 | |
5d1634d7 | 2015 | /* Set on error. */ |
721956f4 AM |
2016 | unsigned int stub_error; |
2017 | ||
2018 | /* Flag set when small branches are detected. Used to | |
2019 | select suitable defaults for the stub group size. */ | |
2020 | unsigned int has_14bit_branch; | |
2021 | ||
805fc799 AM |
2022 | /* Set if we detect a reference undefined weak symbol. */ |
2023 | unsigned int have_undefweak; | |
2024 | ||
721956f4 AM |
2025 | /* Incremented every time we size stubs. */ |
2026 | unsigned int stub_iteration; | |
5d1634d7 | 2027 | |
ec338859 AM |
2028 | /* Small local sym to section mapping cache. */ |
2029 | struct sym_sec_cache sym_sec; | |
65f38f15 AM |
2030 | }; |
2031 | ||
721956f4 AM |
2032 | static struct bfd_hash_entry *stub_hash_newfunc |
2033 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
2034 | static struct bfd_hash_entry *branch_hash_newfunc | |
2035 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
2036 | static struct bfd_hash_entry *link_hash_newfunc | |
2037 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
2038 | static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create | |
2039 | PARAMS ((bfd *)); | |
2040 | static void ppc64_elf_link_hash_table_free | |
2041 | PARAMS ((struct bfd_link_hash_table *)); | |
2042 | static char *ppc_stub_name | |
2043 | PARAMS ((const asection *, const asection *, | |
2044 | const struct ppc_link_hash_entry *, const Elf_Internal_Rela *)); | |
2045 | static struct ppc_stub_hash_entry *ppc_get_stub_entry | |
2046 | PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *, | |
2047 | const Elf_Internal_Rela *, struct ppc_link_hash_table *)); | |
2048 | static struct ppc_stub_hash_entry *ppc_add_stub | |
2049 | PARAMS ((const char *, asection *, struct ppc_link_hash_table *)); | |
2050 | static boolean create_linkage_sections | |
2051 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2052 | static boolean create_got_section | |
2053 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2054 | static boolean ppc64_elf_create_dynamic_sections | |
2055 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2056 | static void ppc64_elf_copy_indirect_symbol | |
2057 | PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *)); | |
2058 | static boolean ppc64_elf_check_relocs | |
2059 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
2060 | const Elf_Internal_Rela *)); | |
2061 | static asection * ppc64_elf_gc_mark_hook | |
2062 | PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Rela *rel, | |
2063 | struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)); | |
2064 | static boolean ppc64_elf_gc_sweep_hook | |
2065 | PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec, | |
2066 | const Elf_Internal_Rela *relocs)); | |
2067 | static boolean func_desc_adjust | |
2068 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
2069 | static boolean ppc64_elf_func_desc_adjust | |
2070 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2071 | static boolean ppc64_elf_adjust_dynamic_symbol | |
2072 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
2073 | static void ppc64_elf_hide_symbol | |
2074 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean)); | |
2075 | static boolean allocate_dynrelocs | |
2076 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
2077 | static boolean readonly_dynrelocs | |
2078 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
2079 | static enum elf_reloc_type_class ppc64_elf_reloc_type_class | |
2080 | PARAMS ((const Elf_Internal_Rela *)); | |
2081 | static boolean ppc64_elf_size_dynamic_sections | |
2082 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2083 | static INLINE enum ppc_stub_type ppc_type_of_stub | |
2084 | PARAMS ((asection *, const Elf_Internal_Rela *, | |
2085 | struct ppc_link_hash_entry **, bfd_vma)); | |
2086 | static bfd_byte *build_plt_stub | |
2087 | PARAMS ((bfd *, bfd_byte *, int, int)); | |
2088 | static boolean ppc_build_one_stub | |
2089 | PARAMS ((struct bfd_hash_entry *, PTR)); | |
2090 | static boolean ppc_size_one_stub | |
2091 | PARAMS ((struct bfd_hash_entry *, PTR)); | |
2092 | static void group_sections | |
2093 | PARAMS ((struct ppc_link_hash_table *, bfd_size_type, boolean)); | |
2094 | static boolean get_local_syms | |
2095 | PARAMS ((bfd *, struct ppc_link_hash_table *)); | |
2096 | static boolean ppc64_elf_fake_sections | |
2097 | PARAMS ((bfd *, Elf64_Internal_Shdr *, asection *)); | |
2098 | static boolean ppc64_elf_relocate_section | |
2099 | PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *, | |
2100 | Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms, | |
2101 | asection **)); | |
2102 | static boolean ppc64_elf_finish_dynamic_symbol | |
2103 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
2104 | Elf_Internal_Sym *)); | |
2105 | static boolean ppc64_elf_finish_dynamic_sections | |
2106 | PARAMS ((bfd *, struct bfd_link_info *)); | |
2107 | ||
65f38f15 AM |
2108 | /* Get the ppc64 ELF linker hash table from a link_info structure. */ |
2109 | ||
2110 | #define ppc_hash_table(p) \ | |
2111 | ((struct ppc_link_hash_table *) ((p)->hash)) | |
2112 | ||
721956f4 AM |
2113 | #define ppc_stub_hash_lookup(table, string, create, copy) \ |
2114 | ((struct ppc_stub_hash_entry *) \ | |
2115 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
2116 | ||
2117 | #define ppc_branch_hash_lookup(table, string, create, copy) \ | |
2118 | ((struct ppc_branch_hash_entry *) \ | |
2119 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
2120 | ||
2121 | /* Create an entry in the stub hash table. */ | |
2122 | ||
2123 | static struct bfd_hash_entry * | |
2124 | stub_hash_newfunc (entry, table, string) | |
2125 | struct bfd_hash_entry *entry; | |
2126 | struct bfd_hash_table *table; | |
2127 | const char *string; | |
2128 | { | |
2129 | /* Allocate the structure if it has not already been allocated by a | |
2130 | subclass. */ | |
2131 | if (entry == NULL) | |
2132 | { | |
2133 | entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); | |
2134 | if (entry == NULL) | |
2135 | return entry; | |
2136 | } | |
2137 | ||
2138 | /* Call the allocation method of the superclass. */ | |
2139 | entry = bfd_hash_newfunc (entry, table, string); | |
2140 | if (entry != NULL) | |
2141 | { | |
2142 | struct ppc_stub_hash_entry *eh; | |
2143 | ||
2144 | /* Initialize the local fields. */ | |
2145 | eh = (struct ppc_stub_hash_entry *) entry; | |
2146 | eh->stub_sec = NULL; | |
2147 | eh->stub_offset = 0; | |
2148 | eh->target_value = 0; | |
2149 | eh->target_section = NULL; | |
2150 | eh->stub_type = ppc_stub_none; | |
2151 | eh->h = NULL; | |
2152 | eh->id_sec = NULL; | |
2153 | } | |
2154 | ||
2155 | return entry; | |
2156 | } | |
2157 | ||
2158 | /* Create an entry in the branch hash table. */ | |
2159 | ||
2160 | static struct bfd_hash_entry * | |
2161 | branch_hash_newfunc (entry, table, string) | |
2162 | struct bfd_hash_entry *entry; | |
2163 | struct bfd_hash_table *table; | |
2164 | const char *string; | |
2165 | { | |
2166 | /* Allocate the structure if it has not already been allocated by a | |
2167 | subclass. */ | |
2168 | if (entry == NULL) | |
2169 | { | |
2170 | entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); | |
2171 | if (entry == NULL) | |
2172 | return entry; | |
2173 | } | |
2174 | ||
2175 | /* Call the allocation method of the superclass. */ | |
2176 | entry = bfd_hash_newfunc (entry, table, string); | |
2177 | if (entry != NULL) | |
2178 | { | |
2179 | struct ppc_branch_hash_entry *eh; | |
2180 | ||
2181 | /* Initialize the local fields. */ | |
2182 | eh = (struct ppc_branch_hash_entry *) entry; | |
2183 | eh->offset = 0; | |
2184 | eh->iter = 0; | |
2185 | } | |
2186 | ||
2187 | return entry; | |
2188 | } | |
2189 | ||
65f38f15 AM |
2190 | /* Create an entry in a ppc64 ELF linker hash table. */ |
2191 | ||
2192 | static struct bfd_hash_entry * | |
2193 | link_hash_newfunc (entry, table, string) | |
2194 | struct bfd_hash_entry *entry; | |
2195 | struct bfd_hash_table *table; | |
2196 | const char *string; | |
2197 | { | |
2198 | /* Allocate the structure if it has not already been allocated by a | |
2199 | subclass. */ | |
2200 | if (entry == NULL) | |
2201 | { | |
2202 | entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); | |
2203 | if (entry == NULL) | |
2204 | return entry; | |
2205 | } | |
2206 | ||
2207 | /* Call the allocation method of the superclass. */ | |
2208 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
2209 | if (entry != NULL) | |
2210 | { | |
2211 | struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; | |
2212 | ||
721956f4 | 2213 | eh->stub_cache = NULL; |
65f38f15 | 2214 | eh->dyn_relocs = NULL; |
721956f4 | 2215 | eh->oh = NULL; |
e86ce104 AM |
2216 | eh->is_func = 0; |
2217 | eh->is_func_descriptor = 0; | |
65f38f15 AM |
2218 | } |
2219 | ||
2220 | return entry; | |
2221 | } | |
2222 | ||
2223 | /* Create a ppc64 ELF linker hash table. */ | |
2224 | ||
2225 | static struct bfd_link_hash_table * | |
2226 | ppc64_elf_link_hash_table_create (abfd) | |
2227 | bfd *abfd; | |
2228 | { | |
2229 | struct ppc_link_hash_table *htab; | |
2230 | bfd_size_type amt = sizeof (struct ppc_link_hash_table); | |
2231 | ||
e2d34d7d | 2232 | htab = (struct ppc_link_hash_table *) bfd_malloc (amt); |
65f38f15 AM |
2233 | if (htab == NULL) |
2234 | return NULL; | |
2235 | ||
2236 | if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc)) | |
2237 | { | |
e2d34d7d | 2238 | free (htab); |
65f38f15 AM |
2239 | return NULL; |
2240 | } | |
2241 | ||
721956f4 AM |
2242 | /* Init the stub hash table too. */ |
2243 | if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc)) | |
2244 | return NULL; | |
2245 | ||
2246 | /* And the branch hash table. */ | |
2247 | if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc)) | |
2248 | return NULL; | |
2249 | ||
2250 | htab->stub_bfd = NULL; | |
2251 | htab->add_stub_section = NULL; | |
2252 | htab->layout_sections_again = NULL; | |
2253 | htab->stub_group = NULL; | |
65f38f15 AM |
2254 | htab->sgot = NULL; |
2255 | htab->srelgot = NULL; | |
2256 | htab->splt = NULL; | |
2257 | htab->srelplt = NULL; | |
2258 | htab->sdynbss = NULL; | |
2259 | htab->srelbss = NULL; | |
2260 | htab->sglink = NULL; | |
82bd7b59 | 2261 | htab->sfpr = NULL; |
721956f4 AM |
2262 | htab->sbrlt = NULL; |
2263 | htab->srelbrlt = NULL; | |
2264 | htab->stub_error = 0; | |
2265 | htab->has_14bit_branch = 0; | |
805fc799 | 2266 | htab->have_undefweak = 0; |
721956f4 | 2267 | htab->stub_iteration = 0; |
ec338859 | 2268 | htab->sym_sec.abfd = NULL; |
65f38f15 AM |
2269 | |
2270 | return &htab->elf.root; | |
2271 | } | |
2272 | ||
721956f4 AM |
2273 | /* Free the derived linker hash table. */ |
2274 | ||
2275 | static void | |
2276 | ppc64_elf_link_hash_table_free (hash) | |
2277 | struct bfd_link_hash_table *hash; | |
2278 | { | |
2279 | struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash; | |
2280 | ||
2281 | bfd_hash_table_free (&ret->stub_hash_table); | |
2282 | bfd_hash_table_free (&ret->branch_hash_table); | |
2283 | _bfd_generic_link_hash_table_free (hash); | |
2284 | } | |
2285 | ||
2286 | /* Build a name for an entry in the stub hash table. */ | |
2287 | ||
2288 | static char * | |
2289 | ppc_stub_name (input_section, sym_sec, h, rel) | |
2290 | const asection *input_section; | |
2291 | const asection *sym_sec; | |
2292 | const struct ppc_link_hash_entry *h; | |
2293 | const Elf_Internal_Rela *rel; | |
2294 | { | |
2295 | char *stub_name; | |
2296 | bfd_size_type len; | |
2297 | ||
2298 | /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 | |
2299 | offsets from a sym as a branch target? In fact, we could | |
2300 | probably assume the addend is always zero. */ | |
2301 | BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); | |
2302 | ||
2303 | if (h) | |
2304 | { | |
2305 | len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; | |
2306 | stub_name = bfd_malloc (len); | |
2307 | if (stub_name != NULL) | |
2308 | { | |
2309 | sprintf (stub_name, "%08x_%s+%x", | |
2310 | input_section->id & 0xffffffff, | |
2311 | h->elf.root.root.string, | |
2312 | (int) rel->r_addend & 0xffffffff); | |
2313 | } | |
2314 | } | |
2315 | else | |
2316 | { | |
2317 | len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1; | |
2318 | stub_name = bfd_malloc (len); | |
2319 | if (stub_name != NULL) | |
2320 | { | |
2321 | sprintf (stub_name, "%08x_%x:%x+%x", | |
2322 | input_section->id & 0xffffffff, | |
2323 | sym_sec->id & 0xffffffff, | |
2324 | (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, | |
2325 | (int) rel->r_addend & 0xffffffff); | |
2326 | } | |
2327 | } | |
2328 | return stub_name; | |
2329 | } | |
2330 | ||
2331 | /* Look up an entry in the stub hash. Stub entries are cached because | |
2332 | creating the stub name takes a bit of time. */ | |
2333 | ||
2334 | static struct ppc_stub_hash_entry * | |
2335 | ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab) | |
2336 | const asection *input_section; | |
2337 | const asection *sym_sec; | |
2338 | struct elf_link_hash_entry *hash; | |
2339 | const Elf_Internal_Rela *rel; | |
2340 | struct ppc_link_hash_table *htab; | |
2341 | { | |
2342 | struct ppc_stub_hash_entry *stub_entry; | |
2343 | struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash; | |
2344 | const asection *id_sec; | |
2345 | ||
2346 | /* If this input section is part of a group of sections sharing one | |
2347 | stub section, then use the id of the first section in the group. | |
2348 | Stub names need to include a section id, as there may well be | |
2349 | more than one stub used to reach say, printf, and we need to | |
2350 | distinguish between them. */ | |
2351 | id_sec = htab->stub_group[input_section->id].link_sec; | |
2352 | ||
2353 | if (h != NULL && h->stub_cache != NULL | |
2354 | && h->stub_cache->h == h | |
2355 | && h->stub_cache->id_sec == id_sec) | |
2356 | { | |
2357 | stub_entry = h->stub_cache; | |
2358 | } | |
2359 | else | |
2360 | { | |
2361 | char *stub_name; | |
2362 | ||
2363 | stub_name = ppc_stub_name (id_sec, sym_sec, h, rel); | |
2364 | if (stub_name == NULL) | |
2365 | return NULL; | |
2366 | ||
2367 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, | |
2368 | stub_name, false, false); | |
2369 | if (h != NULL) | |
2370 | h->stub_cache = stub_entry; | |
2371 | ||
2372 | free (stub_name); | |
2373 | } | |
2374 | ||
2375 | return stub_entry; | |
2376 | } | |
2377 | ||
2378 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
2379 | stub entry are initialised. */ | |
2380 | ||
2381 | static struct ppc_stub_hash_entry * | |
2382 | ppc_add_stub (stub_name, section, htab) | |
2383 | const char *stub_name; | |
2384 | asection *section; | |
2385 | struct ppc_link_hash_table *htab; | |
2386 | { | |
2387 | asection *link_sec; | |
2388 | asection *stub_sec; | |
2389 | struct ppc_stub_hash_entry *stub_entry; | |
2390 | ||
2391 | link_sec = htab->stub_group[section->id].link_sec; | |
2392 | stub_sec = htab->stub_group[section->id].stub_sec; | |
2393 | if (stub_sec == NULL) | |
2394 | { | |
2395 | stub_sec = htab->stub_group[link_sec->id].stub_sec; | |
2396 | if (stub_sec == NULL) | |
2397 | { | |
2398 | bfd_size_type len; | |
2399 | char *s_name; | |
2400 | ||
2401 | len = strlen (link_sec->name) + sizeof (STUB_SUFFIX); | |
2402 | s_name = bfd_alloc (htab->stub_bfd, len); | |
2403 | if (s_name == NULL) | |
2404 | return NULL; | |
2405 | ||
2406 | strcpy (s_name, link_sec->name); | |
2407 | strcpy (s_name + len - sizeof (STUB_SUFFIX), STUB_SUFFIX); | |
2408 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); | |
2409 | if (stub_sec == NULL) | |
2410 | return NULL; | |
2411 | htab->stub_group[link_sec->id].stub_sec = stub_sec; | |
2412 | } | |
2413 | htab->stub_group[section->id].stub_sec = stub_sec; | |
2414 | } | |
2415 | ||
2416 | /* Enter this entry into the linker stub hash table. */ | |
2417 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, | |
2418 | true, false); | |
2419 | if (stub_entry == NULL) | |
2420 | { | |
2421 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), | |
2422 | bfd_archive_filename (section->owner), | |
2423 | stub_name); | |
2424 | return NULL; | |
2425 | } | |
2426 | ||
2427 | stub_entry->stub_sec = stub_sec; | |
2428 | stub_entry->stub_offset = 0; | |
2429 | stub_entry->id_sec = link_sec; | |
2430 | return stub_entry; | |
2431 | } | |
2432 | ||
82bd7b59 AM |
2433 | /* Create sections for linker generated code. */ |
2434 | ||
2435 | static boolean | |
2436 | create_linkage_sections (dynobj, info) | |
2437 | bfd *dynobj; | |
2438 | struct bfd_link_info *info; | |
2439 | { | |
2440 | struct ppc_link_hash_table *htab; | |
2441 | flagword flags; | |
2442 | ||
2443 | htab = ppc_hash_table (info); | |
2444 | ||
2445 | /* Create .sfpr for code to save and restore fp regs. */ | |
2446 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | |
2447 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
721956f4 | 2448 | htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr"); |
82bd7b59 AM |
2449 | if (htab->sfpr == NULL |
2450 | || ! bfd_set_section_flags (dynobj, htab->sfpr, flags) | |
2451 | || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2)) | |
2452 | return false; | |
2453 | ||
721956f4 AM |
2454 | /* Create .glink for lazy dynamic linking support. */ |
2455 | htab->sglink = bfd_make_section_anyway (dynobj, ".glink"); | |
82bd7b59 AM |
2456 | if (htab->sglink == NULL |
2457 | || ! bfd_set_section_flags (dynobj, htab->sglink, flags) | |
2458 | || ! bfd_set_section_alignment (dynobj, htab->sglink, 2)) | |
2459 | return false; | |
2460 | ||
721956f4 AM |
2461 | /* Create .branch_lt for plt_branch stubs. */ |
2462 | flags = (SEC_ALLOC | SEC_LOAD | |
2463 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2464 | htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt"); | |
2465 | if (htab->sbrlt == NULL | |
2466 | || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags) | |
2467 | || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3)) | |
2468 | return false; | |
2469 | ||
2470 | if (info->shared) | |
2471 | { | |
2472 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
2473 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2474 | htab->srelbrlt = bfd_make_section (dynobj, ".rela.branch_lt"); | |
2475 | if (!htab->srelbrlt | |
2476 | || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags) | |
2477 | || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3)) | |
2478 | return false; | |
2479 | } | |
82bd7b59 AM |
2480 | return true; |
2481 | } | |
2482 | ||
65f38f15 AM |
2483 | /* Create .got and .rela.got sections in DYNOBJ, and set up |
2484 | shortcuts to them in our hash table. */ | |
2485 | ||
2486 | static boolean | |
2487 | create_got_section (dynobj, info) | |
2488 | bfd *dynobj; | |
2489 | struct bfd_link_info *info; | |
2490 | { | |
2491 | struct ppc_link_hash_table *htab; | |
2492 | ||
2493 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
2494 | return false; | |
2495 | ||
2496 | htab = ppc_hash_table (info); | |
2497 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2498 | if (!htab->sgot) | |
2499 | abort (); | |
2500 | ||
2501 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); | |
2502 | if (!htab->srelgot | |
2503 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
2504 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
2505 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
2506 | | SEC_READONLY)) | |
2507 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) | |
2508 | return false; | |
2509 | return true; | |
2510 | } | |
5bd4f169 | 2511 | |
82bd7b59 | 2512 | /* Create the dynamic sections, and set up shortcuts. */ |
5bd4f169 AM |
2513 | |
2514 | static boolean | |
65f38f15 AM |
2515 | ppc64_elf_create_dynamic_sections (dynobj, info) |
2516 | bfd *dynobj; | |
5bd4f169 AM |
2517 | struct bfd_link_info *info; |
2518 | { | |
65f38f15 | 2519 | struct ppc_link_hash_table *htab; |
5bd4f169 | 2520 | |
65f38f15 AM |
2521 | htab = ppc_hash_table (info); |
2522 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
5bd4f169 AM |
2523 | return false; |
2524 | ||
65f38f15 | 2525 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
5bd4f169 | 2526 | return false; |
65f38f15 AM |
2527 | |
2528 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2529 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
2530 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
2531 | if (!info->shared) | |
2532 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
2533 | ||
2534 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
2535 | || (!info->shared && !htab->srelbss)) | |
2536 | abort (); | |
2537 | ||
5bd4f169 AM |
2538 | return true; |
2539 | } | |
2540 | ||
65f38f15 AM |
2541 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
2542 | ||
2543 | static void | |
2544 | ppc64_elf_copy_indirect_symbol (dir, ind) | |
2545 | struct elf_link_hash_entry *dir, *ind; | |
2546 | { | |
2547 | struct ppc_link_hash_entry *edir, *eind; | |
2548 | ||
2549 | edir = (struct ppc_link_hash_entry *) dir; | |
2550 | eind = (struct ppc_link_hash_entry *) ind; | |
2551 | ||
bbd7ec4a | 2552 | if (eind->dyn_relocs != NULL) |
65f38f15 | 2553 | { |
bbd7ec4a AM |
2554 | if (edir->dyn_relocs != NULL) |
2555 | { | |
2556 | struct ppc_dyn_relocs **pp; | |
2557 | struct ppc_dyn_relocs *p; | |
2558 | ||
1e370bd2 | 2559 | if (ind->root.type == bfd_link_hash_indirect) |
bbd7ec4a AM |
2560 | abort (); |
2561 | ||
2562 | /* Add reloc counts against the weak sym to the strong sym | |
2563 | list. Merge any entries against the same section. */ | |
2564 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
2565 | { | |
2566 | struct ppc_dyn_relocs *q; | |
2567 | ||
2568 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
2569 | if (q->sec == p->sec) | |
2570 | { | |
2571 | q->pc_count += p->pc_count; | |
2572 | q->count += p->count; | |
2573 | *pp = p->next; | |
2574 | break; | |
2575 | } | |
2576 | if (q == NULL) | |
2577 | pp = &p->next; | |
2578 | } | |
2579 | *pp = edir->dyn_relocs; | |
2580 | } | |
2581 | ||
65f38f15 AM |
2582 | edir->dyn_relocs = eind->dyn_relocs; |
2583 | eind->dyn_relocs = NULL; | |
2584 | } | |
65f38f15 | 2585 | |
e86ce104 AM |
2586 | edir->is_func |= eind->is_func; |
2587 | edir->is_func_descriptor |= eind->is_func_descriptor; | |
2588 | ||
65f38f15 AM |
2589 | _bfd_elf_link_hash_copy_indirect (dir, ind); |
2590 | } | |
2591 | ||
5bd4f169 | 2592 | /* Look through the relocs for a section during the first phase, and |
65f38f15 | 2593 | calculate needed space in the global offset table, procedure |
5d1634d7 | 2594 | linkage table, and dynamic reloc sections. */ |
5bd4f169 AM |
2595 | |
2596 | static boolean | |
2597 | ppc64_elf_check_relocs (abfd, info, sec, relocs) | |
2598 | bfd *abfd; | |
2599 | struct bfd_link_info *info; | |
2600 | asection *sec; | |
2601 | const Elf_Internal_Rela *relocs; | |
2602 | { | |
65f38f15 | 2603 | struct ppc_link_hash_table *htab; |
5bd4f169 AM |
2604 | Elf_Internal_Shdr *symtab_hdr; |
2605 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
2606 | const Elf_Internal_Rela *rel; | |
2607 | const Elf_Internal_Rela *rel_end; | |
5bd4f169 | 2608 | asection *sreloc; |
e86ce104 | 2609 | boolean is_opd; |
5bd4f169 AM |
2610 | |
2611 | if (info->relocateable) | |
2612 | return true; | |
2613 | ||
65f38f15 | 2614 | htab = ppc_hash_table (info); |
5bd4f169 | 2615 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
5bd4f169 AM |
2616 | |
2617 | sym_hashes = elf_sym_hashes (abfd); | |
2618 | sym_hashes_end = (sym_hashes | |
2619 | + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)); | |
2620 | if (!elf_bad_symtab (abfd)) | |
2621 | sym_hashes_end -= symtab_hdr->sh_info; | |
2622 | ||
2623 | sreloc = NULL; | |
e86ce104 | 2624 | is_opd = strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0; |
5bd4f169 | 2625 | |
82bd7b59 AM |
2626 | if (htab->elf.dynobj == NULL) |
2627 | htab->elf.dynobj = abfd; | |
2628 | if (htab->sfpr == NULL | |
2629 | && !create_linkage_sections (htab->elf.dynobj, info)) | |
2630 | return false; | |
2631 | ||
5bd4f169 AM |
2632 | rel_end = relocs + sec->reloc_count; |
2633 | for (rel = relocs; rel < rel_end; rel++) | |
2634 | { | |
2635 | unsigned long r_symndx; | |
2636 | struct elf_link_hash_entry *h; | |
a33d1f77 | 2637 | enum elf_ppc_reloc_type r_type; |
5bd4f169 AM |
2638 | |
2639 | r_symndx = ELF64_R_SYM (rel->r_info); | |
2640 | if (r_symndx < symtab_hdr->sh_info) | |
2641 | h = NULL; | |
2642 | else | |
2643 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2644 | ||
a33d1f77 AM |
2645 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); |
2646 | switch (r_type) | |
5bd4f169 AM |
2647 | { |
2648 | /* GOT16 relocations */ | |
2649 | case R_PPC64_GOT16: | |
5bd4f169 | 2650 | case R_PPC64_GOT16_DS: |
65f38f15 AM |
2651 | case R_PPC64_GOT16_HA: |
2652 | case R_PPC64_GOT16_HI: | |
2653 | case R_PPC64_GOT16_LO: | |
5bd4f169 | 2654 | case R_PPC64_GOT16_LO_DS: |
5bd4f169 | 2655 | |
65f38f15 | 2656 | /* This symbol requires a global offset table entry. */ |
82bd7b59 AM |
2657 | if (htab->sgot == NULL |
2658 | && !create_got_section (htab->elf.dynobj, info)) | |
2659 | return false; | |
5bd4f169 AM |
2660 | |
2661 | if (h != NULL) | |
2662 | { | |
65f38f15 | 2663 | h->got.refcount += 1; |
5bd4f169 AM |
2664 | } |
2665 | else | |
2666 | { | |
65f38f15 AM |
2667 | bfd_signed_vma *local_got_refcounts; |
2668 | ||
5bd4f169 | 2669 | /* This is a global offset table entry for a local symbol. */ |
65f38f15 | 2670 | local_got_refcounts = elf_local_got_refcounts (abfd); |
5bd4f169 AM |
2671 | if (local_got_refcounts == NULL) |
2672 | { | |
dc810e39 | 2673 | bfd_size_type size; |
5bd4f169 | 2674 | |
dc810e39 AM |
2675 | size = symtab_hdr->sh_info; |
2676 | size *= sizeof (bfd_signed_vma); | |
2677 | local_got_refcounts = ((bfd_signed_vma *) | |
65f38f15 | 2678 | bfd_zalloc (abfd, size)); |
5bd4f169 AM |
2679 | if (local_got_refcounts == NULL) |
2680 | return false; | |
2681 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
5bd4f169 | 2682 | } |
65f38f15 | 2683 | local_got_refcounts[r_symndx] += 1; |
5bd4f169 AM |
2684 | } |
2685 | break; | |
2686 | ||
5bd4f169 | 2687 | case R_PPC64_PLT16_HA: |
65f38f15 AM |
2688 | case R_PPC64_PLT16_HI: |
2689 | case R_PPC64_PLT16_LO: | |
2690 | case R_PPC64_PLT32: | |
2691 | case R_PPC64_PLT64: | |
5bd4f169 AM |
2692 | /* This symbol requires a procedure linkage table entry. We |
2693 | actually build the entry in adjust_dynamic_symbol, | |
2694 | because this might be a case of linking PIC code without | |
2695 | linking in any dynamic objects, in which case we don't | |
2696 | need to generate a procedure linkage table after all. */ | |
5bd4f169 AM |
2697 | if (h == NULL) |
2698 | { | |
2699 | /* It does not make sense to have a procedure linkage | |
2700 | table entry for a local symbol. */ | |
2701 | bfd_set_error (bfd_error_bad_value); | |
2702 | return false; | |
2703 | } | |
2704 | ||
65f38f15 AM |
2705 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
2706 | h->plt.refcount += 1; | |
e86ce104 | 2707 | ((struct ppc_link_hash_entry *) h)->is_func = 1; |
5bd4f169 AM |
2708 | break; |
2709 | ||
2710 | /* The following relocations don't need to propagate the | |
2711 | relocation if linking a shared object since they are | |
2712 | section relative. */ | |
2713 | case R_PPC64_SECTOFF: | |
2714 | case R_PPC64_SECTOFF_LO: | |
2715 | case R_PPC64_SECTOFF_HI: | |
2716 | case R_PPC64_SECTOFF_HA: | |
2717 | case R_PPC64_SECTOFF_DS: | |
2718 | case R_PPC64_SECTOFF_LO_DS: | |
2719 | case R_PPC64_TOC16: | |
2720 | case R_PPC64_TOC16_LO: | |
2721 | case R_PPC64_TOC16_HI: | |
2722 | case R_PPC64_TOC16_HA: | |
2723 | case R_PPC64_TOC16_DS: | |
2724 | case R_PPC64_TOC16_LO_DS: | |
2725 | break; | |
2726 | ||
2727 | /* This relocation describes the C++ object vtable hierarchy. | |
2728 | Reconstruct it for later use during GC. */ | |
2729 | case R_PPC64_GNU_VTINHERIT: | |
2730 | if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
2731 | return false; | |
2732 | break; | |
2733 | ||
2734 | /* This relocation describes which C++ vtable entries are actually | |
2735 | used. Record for later use during GC. */ | |
2736 | case R_PPC64_GNU_VTENTRY: | |
2737 | if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
2738 | return false; | |
2739 | break; | |
2740 | ||
721956f4 AM |
2741 | case R_PPC64_REL14: |
2742 | case R_PPC64_REL14_BRTAKEN: | |
2743 | case R_PPC64_REL14_BRNTAKEN: | |
2744 | htab->has_14bit_branch = 1; | |
2745 | /* Fall through. */ | |
2746 | ||
5d1634d7 | 2747 | case R_PPC64_REL24: |
e86ce104 AM |
2748 | if (h != NULL |
2749 | && h->root.root.string[0] == '.' | |
2750 | && h->root.root.string[1] != 0) | |
5d1634d7 AM |
2751 | { |
2752 | /* We may need a .plt entry if the function this reloc | |
2753 | refers to is in a shared lib. */ | |
2754 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
2755 | h->plt.refcount += 1; | |
e86ce104 | 2756 | ((struct ppc_link_hash_entry *) h)->is_func = 1; |
5d1634d7 AM |
2757 | } |
2758 | break; | |
2759 | ||
e86ce104 AM |
2760 | case R_PPC64_ADDR64: |
2761 | if (is_opd | |
2762 | && h != NULL | |
2763 | && h->root.root.string[0] == '.' | |
2764 | && h->root.root.string[1] != 0) | |
2765 | { | |
2766 | struct elf_link_hash_entry *fdh; | |
2767 | ||
2768 | fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, | |
2769 | false, false, false); | |
2770 | if (fdh != NULL) | |
2771 | { | |
2772 | /* Ensure the function descriptor symbol string is | |
2773 | part of the code symbol string. We aren't | |
2774 | changing the name here, just allowing some tricks | |
2775 | in ppc64_elf_hide_symbol. */ | |
2776 | fdh->root.root.string = h->root.root.string + 1; | |
2777 | ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; | |
721956f4 | 2778 | ((struct ppc_link_hash_entry *) fdh)->oh = h; |
e86ce104 | 2779 | ((struct ppc_link_hash_entry *) h)->is_func = 1; |
721956f4 | 2780 | ((struct ppc_link_hash_entry *) h)->oh = fdh; |
e86ce104 AM |
2781 | } |
2782 | } | |
2783 | /* Fall through. */ | |
2784 | ||
5bd4f169 AM |
2785 | case R_PPC64_REL64: |
2786 | case R_PPC64_REL32: | |
65f38f15 AM |
2787 | case R_PPC64_ADDR14: |
2788 | case R_PPC64_ADDR14_BRNTAKEN: | |
2789 | case R_PPC64_ADDR14_BRTAKEN: | |
2790 | case R_PPC64_ADDR16: | |
2791 | case R_PPC64_ADDR16_DS: | |
2792 | case R_PPC64_ADDR16_HA: | |
2793 | case R_PPC64_ADDR16_HI: | |
2794 | case R_PPC64_ADDR16_HIGHER: | |
2795 | case R_PPC64_ADDR16_HIGHERA: | |
2796 | case R_PPC64_ADDR16_HIGHEST: | |
2797 | case R_PPC64_ADDR16_HIGHESTA: | |
2798 | case R_PPC64_ADDR16_LO: | |
2799 | case R_PPC64_ADDR16_LO_DS: | |
2800 | case R_PPC64_ADDR24: | |
2801 | case R_PPC64_ADDR30: | |
2802 | case R_PPC64_ADDR32: | |
65f38f15 AM |
2803 | case R_PPC64_UADDR16: |
2804 | case R_PPC64_UADDR32: | |
2805 | case R_PPC64_UADDR64: | |
5bd4f169 | 2806 | case R_PPC64_TOC: |
41bd81ab AM |
2807 | /* Don't propagate .opd relocs. */ |
2808 | if (NO_OPD_RELOCS && is_opd) | |
e86ce104 | 2809 | break; |
e86ce104 | 2810 | |
65f38f15 AM |
2811 | /* If we are creating a shared library, and this is a reloc |
2812 | against a global symbol, or a non PC relative reloc | |
2813 | against a local symbol, then we need to copy the reloc | |
2814 | into the shared library. However, if we are linking with | |
2815 | -Bsymbolic, we do not need to copy a reloc against a | |
2816 | global symbol which is defined in an object we are | |
2817 | including in the link (i.e., DEF_REGULAR is set). At | |
2818 | this point we have not seen all the input files, so it is | |
2819 | possible that DEF_REGULAR is not set now but will be set | |
2820 | later (it is never cleared). In case of a weak definition, | |
2821 | DEF_REGULAR may be cleared later by a strong definition in | |
2822 | a shared library. We account for that possibility below by | |
2823 | storing information in the relocs_copied field of the hash | |
2824 | table entry. A similar situation occurs when creating | |
2825 | shared libraries and symbol visibility changes render the | |
2826 | symbol local. | |
2827 | ||
2828 | If on the other hand, we are creating an executable, we | |
2829 | may need to keep relocations for symbols satisfied by a | |
2830 | dynamic library if we manage to avoid copy relocs for the | |
2831 | symbol. */ | |
2832 | if ((info->shared | |
2833 | && (sec->flags & SEC_ALLOC) != 0 | |
a33d1f77 | 2834 | && (IS_ABSOLUTE_RELOC (r_type) |
65f38f15 AM |
2835 | || (h != NULL |
2836 | && (! info->symbolic | |
2837 | || h->root.type == bfd_link_hash_defweak | |
2838 | || (h->elf_link_hash_flags | |
2839 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
2840 | || (!info->shared | |
2841 | && (sec->flags & SEC_ALLOC) != 0 | |
2842 | && h != NULL | |
2843 | && (h->root.type == bfd_link_hash_defweak | |
2844 | || (h->elf_link_hash_flags | |
2845 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
5bd4f169 | 2846 | { |
ec338859 AM |
2847 | struct ppc_dyn_relocs *p; |
2848 | struct ppc_dyn_relocs **head; | |
2849 | ||
65f38f15 AM |
2850 | /* We must copy these reloc types into the output file. |
2851 | Create a reloc section in dynobj and make room for | |
2852 | this reloc. */ | |
5bd4f169 AM |
2853 | if (sreloc == NULL) |
2854 | { | |
2855 | const char *name; | |
65f38f15 | 2856 | bfd *dynobj; |
5bd4f169 AM |
2857 | |
2858 | name = (bfd_elf_string_from_elf_section | |
2859 | (abfd, | |
2860 | elf_elfheader (abfd)->e_shstrndx, | |
2861 | elf_section_data (sec)->rel_hdr.sh_name)); | |
2862 | if (name == NULL) | |
2863 | return false; | |
2864 | ||
65f38f15 AM |
2865 | if (strncmp (name, ".rela", 5) != 0 |
2866 | || strcmp (bfd_get_section_name (abfd, sec), | |
2867 | name + 5) != 0) | |
2868 | { | |
2869 | (*_bfd_error_handler) | |
2870 | (_("%s: bad relocation section name `%s\'"), | |
2871 | bfd_archive_filename (abfd), name); | |
5d1634d7 | 2872 | bfd_set_error (bfd_error_bad_value); |
65f38f15 AM |
2873 | } |
2874 | ||
65f38f15 | 2875 | dynobj = htab->elf.dynobj; |
5bd4f169 AM |
2876 | sreloc = bfd_get_section_by_name (dynobj, name); |
2877 | if (sreloc == NULL) | |
2878 | { | |
2879 | flagword flags; | |
2880 | ||
2881 | sreloc = bfd_make_section (dynobj, name); | |
2882 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
2883 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2884 | if ((sec->flags & SEC_ALLOC) != 0) | |
2885 | flags |= SEC_ALLOC | SEC_LOAD; | |
2886 | if (sreloc == NULL | |
2887 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
65f38f15 | 2888 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
5bd4f169 AM |
2889 | return false; |
2890 | } | |
65f38f15 | 2891 | elf_section_data (sec)->sreloc = sreloc; |
5bd4f169 AM |
2892 | } |
2893 | ||
65f38f15 AM |
2894 | /* If this is a global symbol, we count the number of |
2895 | relocations we need for this symbol. */ | |
2896 | if (h != NULL) | |
2897 | { | |
ec338859 | 2898 | head = &((struct ppc_link_hash_entry *) h)->dyn_relocs; |
65f38f15 AM |
2899 | } |
2900 | else | |
2901 | { | |
ec338859 AM |
2902 | /* Track dynamic relocs needed for local syms too. |
2903 | We really need local syms available to do this | |
2904 | easily. Oh well. */ | |
2905 | ||
2906 | asection *s; | |
2907 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
2908 | sec, r_symndx); | |
2909 | if (s == NULL) | |
2910 | return false; | |
2911 | ||
2912 | head = ((struct ppc_dyn_relocs **) | |
2913 | &elf_section_data (s)->local_dynrel); | |
65f38f15 | 2914 | } |
ec338859 AM |
2915 | |
2916 | p = *head; | |
2917 | if (p == NULL || p->sec != sec) | |
2918 | { | |
2919 | p = ((struct ppc_dyn_relocs *) | |
2920 | bfd_alloc (htab->elf.dynobj, | |
2921 | (bfd_size_type) sizeof *p)); | |
2922 | if (p == NULL) | |
2923 | return false; | |
2924 | p->next = *head; | |
2925 | *head = p; | |
2926 | p->sec = sec; | |
2927 | p->count = 0; | |
2928 | p->pc_count = 0; | |
2929 | } | |
2930 | ||
2931 | p->count += 1; | |
2932 | if (!IS_ABSOLUTE_RELOC (r_type)) | |
2933 | p->pc_count += 1; | |
65f38f15 | 2934 | } |
5bd4f169 | 2935 | break; |
65f38f15 AM |
2936 | |
2937 | default: | |
96e0dda4 | 2938 | break; |
5bd4f169 AM |
2939 | } |
2940 | } | |
2941 | ||
2942 | return true; | |
2943 | } | |
2944 | ||
2945 | /* Return the section that should be marked against GC for a given | |
2946 | relocation. */ | |
2947 | ||
2948 | static asection * | |
2949 | ppc64_elf_gc_mark_hook (abfd, info, rel, h, sym) | |
2950 | bfd *abfd; | |
2951 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
2952 | Elf_Internal_Rela *rel; | |
2953 | struct elf_link_hash_entry *h; | |
2954 | Elf_Internal_Sym *sym; | |
2955 | { | |
2956 | if (h != NULL) | |
2957 | { | |
a33d1f77 AM |
2958 | enum elf_ppc_reloc_type r_type; |
2959 | ||
2960 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); | |
2961 | switch (r_type) | |
5bd4f169 AM |
2962 | { |
2963 | case R_PPC64_GNU_VTINHERIT: | |
2964 | case R_PPC64_GNU_VTENTRY: | |
2965 | break; | |
2966 | ||
2967 | default: | |
2968 | switch (h->root.type) | |
2969 | { | |
2970 | case bfd_link_hash_defined: | |
2971 | case bfd_link_hash_defweak: | |
2972 | return h->root.u.def.section; | |
2973 | ||
2974 | case bfd_link_hash_common: | |
2975 | return h->root.u.c.p->section; | |
2976 | ||
2977 | default: | |
2978 | break; | |
2979 | } | |
2980 | } | |
2981 | } | |
2982 | else | |
2983 | { | |
9ad5cbcf | 2984 | return bfd_section_from_elf_index (abfd, sym->st_shndx); |
5bd4f169 AM |
2985 | } |
2986 | ||
2987 | return NULL; | |
2988 | } | |
2989 | ||
65f38f15 AM |
2990 | /* Update the .got, .plt. and dynamic reloc reference counts for the |
2991 | section being removed. */ | |
5bd4f169 AM |
2992 | |
2993 | static boolean | |
2994 | ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs) | |
2995 | bfd *abfd; | |
2996 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
2997 | asection *sec; | |
2998 | const Elf_Internal_Rela *relocs; | |
2999 | { | |
3000 | Elf_Internal_Shdr *symtab_hdr; | |
3001 | struct elf_link_hash_entry **sym_hashes; | |
3002 | bfd_signed_vma *local_got_refcounts; | |
3003 | const Elf_Internal_Rela *rel, *relend; | |
5bd4f169 | 3004 | |
ec338859 AM |
3005 | elf_section_data (sec)->local_dynrel = NULL; |
3006 | ||
5bd4f169 AM |
3007 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
3008 | sym_hashes = elf_sym_hashes (abfd); | |
3009 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
3010 | ||
3011 | relend = relocs + sec->reloc_count; | |
3012 | for (rel = relocs; rel < relend; rel++) | |
a33d1f77 AM |
3013 | { |
3014 | unsigned long r_symndx; | |
3015 | enum elf_ppc_reloc_type r_type; | |
3016 | struct elf_link_hash_entry *h; | |
5bd4f169 | 3017 | |
a33d1f77 AM |
3018 | r_symndx = ELF64_R_SYM (rel->r_info); |
3019 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); | |
3020 | switch (r_type) | |
3021 | { | |
3022 | case R_PPC64_GOT16: | |
3023 | case R_PPC64_GOT16_DS: | |
3024 | case R_PPC64_GOT16_HA: | |
3025 | case R_PPC64_GOT16_HI: | |
3026 | case R_PPC64_GOT16_LO: | |
3027 | case R_PPC64_GOT16_LO_DS: | |
3028 | if (r_symndx >= symtab_hdr->sh_info) | |
3029 | { | |
3030 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
3031 | if (h->got.refcount > 0) | |
3032 | h->got.refcount--; | |
3033 | } | |
3034 | else | |
3035 | { | |
3036 | if (local_got_refcounts[r_symndx] > 0) | |
3037 | local_got_refcounts[r_symndx]--; | |
3038 | } | |
3039 | break; | |
65f38f15 | 3040 | |
a33d1f77 AM |
3041 | case R_PPC64_PLT16_HA: |
3042 | case R_PPC64_PLT16_HI: | |
3043 | case R_PPC64_PLT16_LO: | |
3044 | case R_PPC64_PLT32: | |
3045 | case R_PPC64_PLT64: | |
3046 | if (r_symndx >= symtab_hdr->sh_info) | |
3047 | { | |
3048 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
3049 | if (h->plt.refcount > 0) | |
3050 | h->plt.refcount--; | |
3051 | } | |
3052 | break; | |
65f38f15 | 3053 | |
721956f4 AM |
3054 | case R_PPC64_REL14: |
3055 | case R_PPC64_REL14_BRNTAKEN: | |
3056 | case R_PPC64_REL14_BRTAKEN: | |
5d1634d7 AM |
3057 | case R_PPC64_REL24: |
3058 | if (r_symndx >= symtab_hdr->sh_info) | |
3059 | { | |
3060 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
3061 | if (h->plt.refcount > 0) | |
3062 | h->plt.refcount--; | |
3063 | } | |
e86ce104 | 3064 | break; |
5d1634d7 | 3065 | |
a33d1f77 AM |
3066 | case R_PPC64_REL32: |
3067 | case R_PPC64_REL64: | |
3068 | if (r_symndx >= symtab_hdr->sh_info) | |
3069 | { | |
3070 | struct ppc_link_hash_entry *eh; | |
3071 | struct ppc_dyn_relocs **pp; | |
3072 | struct ppc_dyn_relocs *p; | |
65f38f15 | 3073 | |
a33d1f77 AM |
3074 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3075 | eh = (struct ppc_link_hash_entry *) h; | |
65f38f15 | 3076 | |
a33d1f77 AM |
3077 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
3078 | if (p->sec == sec) | |
3079 | { | |
3080 | p->pc_count -= 1; | |
3081 | p->count -= 1; | |
3082 | if (p->count == 0) | |
3083 | *pp = p->next; | |
3084 | break; | |
3085 | } | |
3086 | } | |
3087 | break; | |
65f38f15 | 3088 | |
a33d1f77 AM |
3089 | case R_PPC64_ADDR14: |
3090 | case R_PPC64_ADDR14_BRNTAKEN: | |
3091 | case R_PPC64_ADDR14_BRTAKEN: | |
3092 | case R_PPC64_ADDR16: | |
3093 | case R_PPC64_ADDR16_DS: | |
3094 | case R_PPC64_ADDR16_HA: | |
3095 | case R_PPC64_ADDR16_HI: | |
3096 | case R_PPC64_ADDR16_HIGHER: | |
3097 | case R_PPC64_ADDR16_HIGHERA: | |
3098 | case R_PPC64_ADDR16_HIGHEST: | |
3099 | case R_PPC64_ADDR16_HIGHESTA: | |
3100 | case R_PPC64_ADDR16_LO: | |
3101 | case R_PPC64_ADDR16_LO_DS: | |
3102 | case R_PPC64_ADDR24: | |
3103 | case R_PPC64_ADDR30: | |
3104 | case R_PPC64_ADDR32: | |
3105 | case R_PPC64_ADDR64: | |
3106 | case R_PPC64_UADDR16: | |
3107 | case R_PPC64_UADDR32: | |
3108 | case R_PPC64_UADDR64: | |
3109 | case R_PPC64_TOC: | |
3110 | if (r_symndx >= symtab_hdr->sh_info) | |
3111 | { | |
3112 | struct ppc_link_hash_entry *eh; | |
3113 | struct ppc_dyn_relocs **pp; | |
3114 | struct ppc_dyn_relocs *p; | |
65f38f15 | 3115 | |
a33d1f77 AM |
3116 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3117 | eh = (struct ppc_link_hash_entry *) h; | |
3118 | ||
3119 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
3120 | if (p->sec == sec) | |
3121 | { | |
3122 | p->count -= 1; | |
3123 | if (p->count == 0) | |
3124 | *pp = p->next; | |
3125 | break; | |
3126 | } | |
3127 | } | |
3128 | break; | |
5bd4f169 | 3129 | |
a33d1f77 AM |
3130 | default: |
3131 | break; | |
3132 | } | |
3133 | } | |
5bd4f169 AM |
3134 | return true; |
3135 | } | |
3136 | ||
e86ce104 AM |
3137 | /* Called via elf_link_hash_traverse to transfer dynamic linking |
3138 | information on function code symbol entries to their corresponding | |
3139 | function descriptor symbol entries. */ | |
5bd4f169 | 3140 | static boolean |
e86ce104 | 3141 | func_desc_adjust (h, inf) |
5bd4f169 | 3142 | struct elf_link_hash_entry *h; |
e86ce104 | 3143 | PTR inf; |
5bd4f169 | 3144 | { |
e86ce104 | 3145 | struct bfd_link_info *info; |
65f38f15 | 3146 | struct ppc_link_hash_table *htab; |
5bd4f169 | 3147 | |
e92d460e | 3148 | if (h->root.type == bfd_link_hash_indirect) |
e86ce104 AM |
3149 | return true; |
3150 | ||
e92d460e AM |
3151 | if (h->root.type == bfd_link_hash_warning) |
3152 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3153 | ||
e86ce104 | 3154 | info = (struct bfd_link_info *) inf; |
65f38f15 | 3155 | htab = ppc_hash_table (info); |
5bd4f169 | 3156 | |
e86ce104 AM |
3157 | /* If this is a function code symbol, transfer dynamic linking |
3158 | information to the function descriptor symbol. */ | |
3159 | if (!((struct ppc_link_hash_entry *) h)->is_func) | |
3160 | return true; | |
3161 | ||
805fc799 AM |
3162 | if (h->root.type == bfd_link_hash_undefweak |
3163 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR)) | |
3164 | htab->have_undefweak = true; | |
3165 | ||
e86ce104 AM |
3166 | if (h->plt.refcount > 0 |
3167 | && h->root.root.string[0] == '.' | |
3168 | && h->root.root.string[1] != '\0') | |
5bd4f169 | 3169 | { |
721956f4 | 3170 | struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh; |
e86ce104 | 3171 | boolean force_local; |
5bd4f169 | 3172 | |
648cca2c AM |
3173 | /* Find the corresponding function descriptor symbol. Create it |
3174 | as undefined if necessary. */ | |
5bd4f169 | 3175 | |
721956f4 AM |
3176 | if (fdh == NULL) |
3177 | fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, | |
3178 | false, false, true); | |
5bd4f169 | 3179 | |
d926e03d AM |
3180 | if (fdh == NULL |
3181 | && info->shared | |
3182 | && (h->root.type == bfd_link_hash_undefined | |
3183 | || h->root.type == bfd_link_hash_undefweak)) | |
648cca2c AM |
3184 | { |
3185 | bfd *abfd; | |
3186 | asymbol *newsym; | |
3187 | ||
d926e03d | 3188 | abfd = h->root.u.undef.abfd; |
648cca2c AM |
3189 | newsym = bfd_make_empty_symbol (abfd); |
3190 | newsym->name = h->root.root.string + 1; | |
3191 | newsym->section = bfd_und_section_ptr; | |
3192 | newsym->value = 0; | |
3193 | newsym->flags = BSF_OBJECT; | |
3194 | if (h->root.type == bfd_link_hash_undefweak) | |
3195 | newsym->flags |= BSF_WEAK; | |
3196 | ||
3197 | if ( !(_bfd_generic_link_add_one_symbol | |
3198 | (info, abfd, newsym->name, newsym->flags, | |
3199 | newsym->section, newsym->value, NULL, false, false, | |
3200 | (struct bfd_link_hash_entry **) &fdh))) | |
3201 | { | |
3202 | return false; | |
3203 | } | |
d926e03d | 3204 | fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF; |
648cca2c AM |
3205 | } |
3206 | ||
e86ce104 AM |
3207 | if (fdh != NULL |
3208 | && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 | |
3209 | && (info->shared | |
3210 | || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3211 | || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
3212 | { | |
3213 | if (fdh->dynindx == -1) | |
3214 | if (! bfd_elf64_link_record_dynamic_symbol (info, fdh)) | |
3215 | return false; | |
e86ce104 AM |
3216 | fdh->elf_link_hash_flags |= (h->elf_link_hash_flags |
3217 | & (ELF_LINK_HASH_REF_REGULAR | |
3218 | | ELF_LINK_HASH_REF_DYNAMIC | |
3219 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK | |
3220 | | ELF_LINK_NON_GOT_REF)); | |
e1fa50e7 AM |
3221 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
3222 | { | |
3223 | fdh->plt.refcount = h->plt.refcount; | |
3224 | fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
3225 | } | |
e86ce104 | 3226 | ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; |
721956f4 | 3227 | ((struct ppc_link_hash_entry *) fdh)->oh = h; |
e86ce104 | 3228 | fdh->root.root.string = h->root.root.string + 1; |
721956f4 | 3229 | ((struct ppc_link_hash_entry *) h)->oh = fdh; |
e86ce104 AM |
3230 | } |
3231 | ||
3232 | /* Now that the info is on the function descriptor, clear the | |
3233 | function code sym info. Any function code syms for which we | |
3234 | don't have a definition in a regular file, we force local. | |
3235 | This prevents a shared library from exporting syms that have | |
3236 | been imported from another library. Function code syms that | |
3237 | are really in the library we must leave global to prevent the | |
e1fa50e7 | 3238 | linker dragging in a definition from a static library. */ |
82bd7b59 AM |
3239 | force_local = ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
3240 | && info->shared); | |
e86ce104 AM |
3241 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
3242 | } | |
3243 | ||
3244 | return true; | |
3245 | } | |
40b8271b | 3246 | |
82bd7b59 AM |
3247 | #define MIN_SAVE_FPR 14 |
3248 | #define MAX_SAVE_FPR 31 | |
3249 | ||
e86ce104 | 3250 | /* Called near the start of bfd_elf_size_dynamic_sections. We use |
82bd7b59 AM |
3251 | this hook to a) provide some gcc support functions, and b) transfer |
3252 | dynamic linking information gathered so far on function code symbol | |
3253 | entries, to their corresponding function descriptor symbol entries. */ | |
e86ce104 AM |
3254 | static boolean |
3255 | ppc64_elf_func_desc_adjust (obfd, info) | |
3256 | bfd *obfd ATTRIBUTE_UNUSED; | |
3257 | struct bfd_link_info *info; | |
3258 | { | |
3259 | struct ppc_link_hash_table *htab; | |
82bd7b59 AM |
3260 | unsigned int lowest_savef = MAX_SAVE_FPR + 2; |
3261 | unsigned int lowest_restf = MAX_SAVE_FPR + 2; | |
3262 | unsigned int i; | |
3263 | struct elf_link_hash_entry *h; | |
721956f4 | 3264 | bfd_byte *p; |
82bd7b59 | 3265 | char sym[10]; |
e86ce104 AM |
3266 | |
3267 | htab = ppc_hash_table (info); | |
82bd7b59 AM |
3268 | |
3269 | if (htab->sfpr == NULL) | |
3270 | /* We don't have any relocs. */ | |
3271 | return true; | |
3272 | ||
3273 | /* First provide any missing ._savef* and ._restf* functions. */ | |
3274 | memcpy (sym, "._savef14", 10); | |
3275 | for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) | |
3276 | { | |
3277 | sym[7] = i / 10 + '0'; | |
3278 | sym[8] = i % 10 + '0'; | |
3279 | h = elf_link_hash_lookup (&htab->elf, sym, false, false, true); | |
3280 | if (h != NULL | |
3281 | && h->root.type == bfd_link_hash_undefined) | |
3282 | { | |
3283 | if (lowest_savef > i) | |
3284 | lowest_savef = i; | |
3285 | h->root.type = bfd_link_hash_defined; | |
3286 | h->root.u.def.section = htab->sfpr; | |
3287 | h->root.u.def.value = (i - lowest_savef) * 4; | |
3288 | h->type = STT_FUNC; | |
3289 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3290 | _bfd_elf_link_hash_hide_symbol (info, h, info->shared); | |
3291 | } | |
3292 | } | |
3293 | ||
3294 | memcpy (sym, "._restf14", 10); | |
3295 | for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) | |
3296 | { | |
3297 | sym[7] = i / 10 + '0'; | |
3298 | sym[8] = i % 10 + '0'; | |
3299 | h = elf_link_hash_lookup (&htab->elf, sym, false, false, true); | |
3300 | if (h != NULL | |
3301 | && h->root.type == bfd_link_hash_undefined) | |
3302 | { | |
3303 | if (lowest_restf > i) | |
3304 | lowest_restf = i; | |
3305 | h->root.type = bfd_link_hash_defined; | |
3306 | h->root.u.def.section = htab->sfpr; | |
3307 | h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 | |
3308 | + (i - lowest_restf) * 4); | |
3309 | h->type = STT_FUNC; | |
3310 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3311 | _bfd_elf_link_hash_hide_symbol (info, h, info->shared); | |
3312 | } | |
3313 | } | |
3314 | ||
805fc799 AM |
3315 | elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info); |
3316 | ||
82bd7b59 AM |
3317 | htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 |
3318 | + (MAX_SAVE_FPR + 2 - lowest_restf) * 4); | |
3319 | ||
3320 | if (htab->sfpr->_raw_size == 0) | |
805fc799 AM |
3321 | { |
3322 | if (!htab->have_undefweak) | |
3323 | { | |
3324 | _bfd_strip_section_from_output (info, htab->sfpr); | |
3325 | return true; | |
3326 | } | |
3327 | ||
3328 | htab->sfpr->_raw_size = 4; | |
3329 | } | |
82bd7b59 | 3330 | |
721956f4 AM |
3331 | p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size); |
3332 | if (p == NULL) | |
3333 | return false; | |
3334 | htab->sfpr->contents = p; | |
3335 | ||
3336 | for (i = lowest_savef; i <= MAX_SAVE_FPR; i++) | |
3337 | { | |
3338 | unsigned int fpr = i << 21; | |
3339 | unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; | |
3340 | bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p); | |
3341 | p += 4; | |
3342 | } | |
3343 | if (lowest_savef <= MAX_SAVE_FPR) | |
3344 | { | |
82bd7b59 AM |
3345 | bfd_put_32 (htab->elf.dynobj, BLR, p); |
3346 | p += 4; | |
721956f4 | 3347 | } |
82bd7b59 | 3348 | |
721956f4 AM |
3349 | for (i = lowest_restf; i <= MAX_SAVE_FPR; i++) |
3350 | { | |
3351 | unsigned int fpr = i << 21; | |
3352 | unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; | |
3353 | bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p); | |
82bd7b59 AM |
3354 | p += 4; |
3355 | } | |
721956f4 AM |
3356 | if (lowest_restf <= MAX_SAVE_FPR |
3357 | || htab->sfpr->_raw_size == 4) | |
3358 | { | |
3359 | bfd_put_32 (htab->elf.dynobj, BLR, p); | |
3360 | } | |
82bd7b59 | 3361 | |
e86ce104 AM |
3362 | return true; |
3363 | } | |
3364 | ||
3365 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
3366 | regular object. The current definition is in some section of the | |
3367 | dynamic object, but we're not including those sections. We have to | |
3368 | change the definition to something the rest of the link can | |
3369 | understand. */ | |
3370 | ||
3371 | static boolean | |
3372 | ppc64_elf_adjust_dynamic_symbol (info, h) | |
3373 | struct bfd_link_info *info; | |
3374 | struct elf_link_hash_entry *h; | |
3375 | { | |
3376 | struct ppc_link_hash_table *htab; | |
3377 | struct ppc_link_hash_entry * eh; | |
3378 | struct ppc_dyn_relocs *p; | |
3379 | asection *s; | |
3380 | unsigned int power_of_two; | |
3381 | ||
3382 | htab = ppc_hash_table (info); | |
3383 | ||
3384 | /* Deal with function syms. */ | |
3385 | if (h->type == STT_FUNC | |
3386 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
3387 | { | |
3388 | /* Clear procedure linkage table information for any symbol that | |
3389 | won't need a .plt entry. */ | |
3390 | if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor | |
3391 | || h->plt.refcount <= 0 | |
3392 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
3393 | || (! info->shared | |
3394 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
3395 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)) | |
40b8271b | 3396 | { |
40b8271b AM |
3397 | h->plt.offset = (bfd_vma) -1; |
3398 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
40b8271b | 3399 | } |
5bd4f169 AM |
3400 | return true; |
3401 | } | |
bbd7ec4a AM |
3402 | else |
3403 | h->plt.offset = (bfd_vma) -1; | |
5bd4f169 AM |
3404 | |
3405 | /* If this is a weak symbol, and there is a real definition, the | |
3406 | processor independent code will have arranged for us to see the | |
3407 | real definition first, and we can just use the same value. */ | |
3408 | if (h->weakdef != NULL) | |
3409 | { | |
3410 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
3411 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
3412 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
3413 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
0a991dfe | 3414 | return true; |
5bd4f169 AM |
3415 | } |
3416 | ||
3417 | /* This is a reference to a symbol defined by a dynamic object which | |
3418 | is not a function. */ | |
3419 | ||
3420 | /* If we are creating a shared library, we must presume that the | |
3421 | only references to the symbol are via the global offset table. | |
3422 | For such cases we need not do anything here; the relocations will | |
3423 | be handled correctly by relocate_section. */ | |
3424 | if (info->shared) | |
3425 | return true; | |
3426 | ||
65f38f15 AM |
3427 | /* If there are no references to this symbol that do not use the |
3428 | GOT, we don't need to generate a copy reloc. */ | |
3429 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
3430 | return true; | |
3431 | ||
3432 | eh = (struct ppc_link_hash_entry *) h; | |
3433 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3434 | { | |
3435 | s = p->sec->output_section; | |
3436 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3437 | break; | |
3438 | } | |
3439 | ||
3440 | /* If we didn't find any dynamic relocs in read-only sections, then | |
5d1634d7 | 3441 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
65f38f15 AM |
3442 | if (p == NULL) |
3443 | { | |
3444 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
3445 | return true; | |
3446 | } | |
3447 | ||
5bd4f169 AM |
3448 | /* We must allocate the symbol in our .dynbss section, which will |
3449 | become part of the .bss section of the executable. There will be | |
3450 | an entry for this symbol in the .dynsym section. The dynamic | |
3451 | object will contain position independent code, so all references | |
3452 | from the dynamic object to this symbol will go through the global | |
3453 | offset table. The dynamic linker will use the .dynsym entry to | |
3454 | determine the address it must put in the global offset table, so | |
3455 | both the dynamic object and the regular object will refer to the | |
3456 | same memory location for the variable. */ | |
5bd4f169 AM |
3457 | |
3458 | /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to | |
3459 | copy the initial value out of the dynamic object and into the | |
3460 | runtime process image. We need to remember the offset into the | |
3461 | .rela.bss section we are going to use. */ | |
3462 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
3463 | { | |
65f38f15 | 3464 | htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
5bd4f169 AM |
3465 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
3466 | } | |
3467 | ||
3468 | /* We need to figure out the alignment required for this symbol. I | |
3469 | have no idea how ELF linkers handle this. */ | |
3470 | power_of_two = bfd_log2 (h->size); | |
3471 | if (power_of_two > 4) | |
3472 | power_of_two = 4; | |
3473 | ||
3474 | /* Apply the required alignment. */ | |
65f38f15 AM |
3475 | s = htab->sdynbss; |
3476 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
3477 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) | |
5bd4f169 | 3478 | { |
65f38f15 | 3479 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
5bd4f169 AM |
3480 | return false; |
3481 | } | |
3482 | ||
3483 | /* Define the symbol as being at this point in the section. */ | |
3484 | h->root.u.def.section = s; | |
3485 | h->root.u.def.value = s->_raw_size; | |
3486 | ||
3487 | /* Increment the section size to make room for the symbol. */ | |
3488 | s->_raw_size += h->size; | |
3489 | ||
3490 | return true; | |
3491 | } | |
3492 | ||
e86ce104 AM |
3493 | /* If given a function descriptor symbol, hide both the function code |
3494 | sym and the descriptor. */ | |
3495 | static void | |
3496 | ppc64_elf_hide_symbol (info, h, force_local) | |
3497 | struct bfd_link_info *info; | |
3498 | struct elf_link_hash_entry *h; | |
3499 | boolean force_local; | |
3500 | { | |
3501 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); | |
3502 | ||
3503 | if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) | |
3504 | { | |
3505 | const char *name; | |
721956f4 | 3506 | struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh; |
e86ce104 AM |
3507 | struct ppc_link_hash_table *htab; |
3508 | ||
3509 | name = h->root.root.string - 1; | |
3510 | htab = ppc_hash_table (info); | |
721956f4 AM |
3511 | if (fh == NULL) |
3512 | fh = elf_link_hash_lookup (&htab->elf, name, false, false, false); | |
e86ce104 AM |
3513 | if (fh != NULL) |
3514 | _bfd_elf_link_hash_hide_symbol (info, fh, force_local); | |
3515 | } | |
3516 | } | |
3517 | ||
65f38f15 AM |
3518 | /* This is the condition under which ppc64_elf_finish_dynamic_symbol |
3519 | will be called from elflink.h. If elflink.h doesn't call our | |
3520 | finish_dynamic_symbol routine, we'll need to do something about | |
3521 | initializing any .plt and .got entries in ppc64_elf_relocate_section. */ | |
3522 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ | |
3523 | ((DYN) \ | |
3524 | && ((INFO)->shared \ | |
3525 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ | |
3526 | && ((H)->dynindx != -1 \ | |
3527 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
5bd4f169 | 3528 | |
65f38f15 AM |
3529 | /* Allocate space in .plt, .got and associated reloc sections for |
3530 | dynamic relocs. */ | |
5bd4f169 AM |
3531 | |
3532 | static boolean | |
65f38f15 AM |
3533 | allocate_dynrelocs (h, inf) |
3534 | struct elf_link_hash_entry *h; | |
3535 | PTR inf; | |
5bd4f169 | 3536 | { |
65f38f15 AM |
3537 | struct bfd_link_info *info; |
3538 | struct ppc_link_hash_table *htab; | |
5bd4f169 | 3539 | asection *s; |
65f38f15 AM |
3540 | struct ppc_link_hash_entry *eh; |
3541 | struct ppc_dyn_relocs *p; | |
5bd4f169 | 3542 | |
e92d460e | 3543 | if (h->root.type == bfd_link_hash_indirect) |
65f38f15 | 3544 | return true; |
5bd4f169 | 3545 | |
e92d460e AM |
3546 | if (h->root.type == bfd_link_hash_warning) |
3547 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3548 | ||
65f38f15 AM |
3549 | info = (struct bfd_link_info *) inf; |
3550 | htab = ppc_hash_table (info); | |
5bd4f169 | 3551 | |
65f38f15 | 3552 | if (htab->elf.dynamic_sections_created |
e86ce104 AM |
3553 | && h->plt.refcount > 0 |
3554 | && h->dynindx != -1) | |
5bd4f169 | 3555 | { |
e86ce104 | 3556 | BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor); |
5bd4f169 | 3557 | |
65f38f15 AM |
3558 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) |
3559 | { | |
65f38f15 AM |
3560 | /* If this is the first .plt entry, make room for the special |
3561 | first entry. */ | |
3562 | s = htab->splt; | |
5bd4f169 | 3563 | if (s->_raw_size == 0) |
65f38f15 AM |
3564 | s->_raw_size += PLT_INITIAL_ENTRY_SIZE; |
3565 | ||
3566 | h->plt.offset = s->_raw_size; | |
3567 | ||
3568 | /* Make room for this entry. */ | |
3569 | s->_raw_size += PLT_ENTRY_SIZE; | |
3570 | ||
721956f4 | 3571 | /* Make room for the .glink code. */ |
5d1634d7 AM |
3572 | s = htab->sglink; |
3573 | if (s->_raw_size == 0) | |
3574 | s->_raw_size += GLINK_CALL_STUB_SIZE; | |
3575 | /* We need bigger stubs past index 32767. */ | |
3576 | if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4) | |
3577 | s->_raw_size += 4; | |
3578 | s->_raw_size += 2*4; | |
65f38f15 AM |
3579 | |
3580 | /* We also need to make an entry in the .rela.plt section. */ | |
3581 | s = htab->srelplt; | |
3582 | s->_raw_size += sizeof (Elf64_External_Rela); | |
3583 | } | |
3584 | else | |
3585 | { | |
3586 | h->plt.offset = (bfd_vma) -1; | |
3587 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
3588 | } | |
3589 | } | |
3590 | else | |
3591 | { | |
3592 | h->plt.offset = (bfd_vma) -1; | |
3593 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
3594 | } | |
3595 | ||
3596 | if (h->got.refcount > 0) | |
3597 | { | |
3598 | boolean dyn; | |
3599 | ||
3600 | /* Make sure this symbol is output as a dynamic symbol. | |
3601 | Undefined weak syms won't yet be marked as dynamic. */ | |
3602 | if (h->dynindx == -1 | |
3603 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3604 | { | |
3605 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
3606 | return false; | |
3607 | } | |
3608 | ||
3609 | s = htab->sgot; | |
3610 | h->got.offset = s->_raw_size; | |
3611 | s->_raw_size += 8; | |
3612 | dyn = htab->elf.dynamic_sections_created; | |
3613 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) | |
3614 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
3615 | } | |
3616 | else | |
3617 | h->got.offset = (bfd_vma) -1; | |
3618 | ||
3619 | eh = (struct ppc_link_hash_entry *) h; | |
3620 | if (eh->dyn_relocs == NULL) | |
3621 | return true; | |
3622 | ||
3623 | /* In the shared -Bsymbolic case, discard space allocated for | |
3624 | dynamic pc-relative relocs against symbols which turn out to be | |
3625 | defined in regular objects. For the normal shared case, discard | |
3626 | space for relocs that have become local due to symbol visibility | |
3627 | changes. */ | |
3628 | ||
3629 | if (info->shared) | |
3630 | { | |
3631 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
3632 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
3633 | || info->symbolic)) | |
3634 | { | |
3635 | struct ppc_dyn_relocs **pp; | |
3636 | ||
3637 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
5bd4f169 | 3638 | { |
65f38f15 AM |
3639 | p->count -= p->pc_count; |
3640 | p->pc_count = 0; | |
3641 | if (p->count == 0) | |
3642 | *pp = p->next; | |
3643 | else | |
3644 | pp = &p->next; | |
5bd4f169 | 3645 | } |
65f38f15 AM |
3646 | } |
3647 | } | |
3648 | else | |
3649 | { | |
3650 | /* For the non-shared case, discard space for relocs against | |
3651 | symbols which turn out to need copy relocs or are not | |
3652 | dynamic. */ | |
3653 | ||
3654 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
3655 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3656 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3657 | || (htab->elf.dynamic_sections_created | |
3658 | && (h->root.type == bfd_link_hash_undefweak | |
3659 | || h->root.type == bfd_link_hash_undefined)))) | |
3660 | { | |
3661 | /* Make sure this symbol is output as a dynamic symbol. | |
3662 | Undefined weak syms won't yet be marked as dynamic. */ | |
3663 | if (h->dynindx == -1 | |
3664 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3665 | { | |
ec338859 | 3666 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
65f38f15 AM |
3667 | return false; |
3668 | } | |
3669 | ||
3670 | /* If that succeeded, we know we'll be keeping all the | |
3671 | relocs. */ | |
3672 | if (h->dynindx != -1) | |
3673 | goto keep; | |
3674 | } | |
3675 | ||
3676 | eh->dyn_relocs = NULL; | |
3677 | ||
ec338859 | 3678 | keep: ; |
65f38f15 AM |
3679 | } |
3680 | ||
3681 | /* Finally, allocate space. */ | |
3682 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3683 | { | |
3684 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
3685 | sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
3686 | } | |
3687 | ||
3688 | return true; | |
3689 | } | |
3690 | ||
3691 | /* Find any dynamic relocs that apply to read-only sections. */ | |
3692 | ||
3693 | static boolean | |
3694 | readonly_dynrelocs (h, inf) | |
3695 | struct elf_link_hash_entry *h; | |
3696 | PTR inf; | |
3697 | { | |
3698 | struct ppc_link_hash_entry *eh; | |
3699 | struct ppc_dyn_relocs *p; | |
3700 | ||
e92d460e AM |
3701 | if (h->root.type == bfd_link_hash_warning) |
3702 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3703 | ||
65f38f15 AM |
3704 | eh = (struct ppc_link_hash_entry *) h; |
3705 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3706 | { | |
3707 | asection *s = p->sec->output_section; | |
3708 | ||
3709 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3710 | { | |
3711 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3712 | ||
3713 | info->flags |= DF_TEXTREL; | |
3714 | ||
3715 | /* Not an error, just cut short the traversal. */ | |
3716 | return false; | |
3717 | } | |
3718 | } | |
3719 | return true; | |
3720 | } | |
3721 | ||
3722 | /* Set the sizes of the dynamic sections. */ | |
3723 | ||
3724 | static boolean | |
3725 | ppc64_elf_size_dynamic_sections (output_bfd, info) | |
3726 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
3727 | struct bfd_link_info *info; | |
3728 | { | |
3729 | struct ppc_link_hash_table *htab; | |
3730 | bfd *dynobj; | |
3731 | asection *s; | |
3732 | boolean relocs; | |
3733 | bfd *ibfd; | |
3734 | ||
3735 | htab = ppc_hash_table (info); | |
3736 | dynobj = htab->elf.dynobj; | |
3737 | if (dynobj == NULL) | |
3738 | abort (); | |
3739 | ||
3740 | if (htab->elf.dynamic_sections_created) | |
3741 | { | |
3742 | /* Set the contents of the .interp section to the interpreter. */ | |
3743 | if (! info->shared) | |
3744 | { | |
3745 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
3746 | if (s == NULL) | |
3747 | abort (); | |
3748 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
3749 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
3750 | } | |
3751 | } | |
3752 | ||
3753 | /* Set up .got offsets for local syms, and space for local dynamic | |
3754 | relocs. */ | |
3755 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
3756 | { | |
3757 | bfd_signed_vma *local_got; | |
3758 | bfd_signed_vma *end_local_got; | |
3759 | bfd_size_type locsymcount; | |
3760 | Elf_Internal_Shdr *symtab_hdr; | |
3761 | asection *srel; | |
3762 | ||
3763 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
3764 | continue; | |
3765 | ||
3766 | for (s = ibfd->sections; s != NULL; s = s->next) | |
3767 | { | |
ec338859 | 3768 | struct ppc_dyn_relocs *p; |
65f38f15 | 3769 | |
ec338859 AM |
3770 | for (p = *((struct ppc_dyn_relocs **) |
3771 | &elf_section_data (s)->local_dynrel); | |
3772 | p != NULL; | |
3773 | p = p->next) | |
65f38f15 | 3774 | { |
ec338859 AM |
3775 | if (!bfd_is_abs_section (p->sec) |
3776 | && bfd_is_abs_section (p->sec->output_section)) | |
3777 | { | |
3778 | /* Input section has been discarded, either because | |
3779 | it is a copy of a linkonce section or due to | |
3780 | linker script /DISCARD/, so we'll be discarding | |
3781 | the relocs too. */ | |
3782 | } | |
248866a8 | 3783 | else if (p->count != 0) |
ec338859 AM |
3784 | { |
3785 | srel = elf_section_data (p->sec)->sreloc; | |
3786 | srel->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
248866a8 AM |
3787 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
3788 | info->flags |= DF_TEXTREL; | |
ec338859 | 3789 | } |
65f38f15 AM |
3790 | } |
3791 | } | |
3792 | ||
3793 | local_got = elf_local_got_refcounts (ibfd); | |
3794 | if (!local_got) | |
3795 | continue; | |
3796 | ||
3797 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
3798 | locsymcount = symtab_hdr->sh_info; | |
3799 | end_local_got = local_got + locsymcount; | |
3800 | s = htab->sgot; | |
3801 | srel = htab->srelgot; | |
3802 | for (; local_got < end_local_got; ++local_got) | |
3803 | { | |
3804 | if (*local_got > 0) | |
5bd4f169 | 3805 | { |
65f38f15 AM |
3806 | *local_got = s->_raw_size; |
3807 | s->_raw_size += 8; | |
3808 | if (info->shared) | |
3809 | srel->_raw_size += sizeof (Elf64_External_Rela); | |
5bd4f169 | 3810 | } |
65f38f15 AM |
3811 | else |
3812 | *local_got = (bfd_vma) -1; | |
3813 | } | |
3814 | } | |
3815 | ||
3816 | /* Allocate global sym .plt and .got entries, and space for global | |
3817 | sym dynamic relocs. */ | |
3818 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
3819 | ||
3820 | /* We now have determined the sizes of the various dynamic sections. | |
3821 | Allocate memory for them. */ | |
3822 | relocs = false; | |
3823 | for (s = dynobj->sections; s != NULL; s = s->next) | |
3824 | { | |
3825 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3826 | continue; | |
3827 | ||
721956f4 AM |
3828 | if (s == htab->sbrlt || s == htab->srelbrlt) |
3829 | /* These haven't been allocated yet; don't strip. */ | |
3830 | continue; | |
3831 | else if (s == htab->splt | |
3832 | || s == htab->sgot | |
3833 | || s == htab->sglink) | |
65f38f15 AM |
3834 | { |
3835 | /* Strip this section if we don't need it; see the | |
3836 | comment below. */ | |
5bd4f169 | 3837 | } |
65f38f15 | 3838 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
5bd4f169 AM |
3839 | { |
3840 | if (s->_raw_size == 0) | |
3841 | { | |
3842 | /* If we don't need this section, strip it from the | |
3843 | output file. This is mostly to handle .rela.bss and | |
3844 | .rela.plt. We must create both sections in | |
3845 | create_dynamic_sections, because they must be created | |
3846 | before the linker maps input sections to output | |
3847 | sections. The linker does that before | |
3848 | adjust_dynamic_symbol is called, and it is that | |
3849 | function which decides whether anything needs to go | |
3850 | into these sections. */ | |
5bd4f169 AM |
3851 | } |
3852 | else | |
3853 | { | |
65f38f15 AM |
3854 | if (s != htab->srelplt) |
3855 | relocs = true; | |
5bd4f169 AM |
3856 | |
3857 | /* We use the reloc_count field as a counter if we need | |
3858 | to copy relocs into the output file. */ | |
3859 | s->reloc_count = 0; | |
3860 | } | |
3861 | } | |
65f38f15 | 3862 | else |
5bd4f169 AM |
3863 | { |
3864 | /* It's not one of our sections, so don't allocate space. */ | |
3865 | continue; | |
3866 | } | |
3867 | ||
65f38f15 | 3868 | if (s->_raw_size == 0) |
5bd4f169 AM |
3869 | { |
3870 | _bfd_strip_section_from_output (info, s); | |
3871 | continue; | |
3872 | } | |
3873 | ||
65f38f15 AM |
3874 | /* Allocate memory for the section contents. We use bfd_zalloc |
3875 | here in case unused entries are not reclaimed before the | |
3876 | section's contents are written out. This should not happen, | |
3877 | but this way if it does, we get a R_PPC64_NONE reloc instead | |
3878 | of garbage. */ | |
721956f4 | 3879 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
65f38f15 | 3880 | if (s->contents == NULL) |
5bd4f169 AM |
3881 | return false; |
3882 | } | |
3883 | ||
e86ce104 | 3884 | if (htab->elf.dynamic_sections_created) |
5bd4f169 AM |
3885 | { |
3886 | /* Add some entries to the .dynamic section. We fill in the | |
3887 | values later, in ppc64_elf_finish_dynamic_sections, but we | |
3888 | must add the entries now so that we get the correct size for | |
3889 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3890 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
3891 | #define add_dynamic_entry(TAG, VAL) \ |
3892 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
3893 | ||
3894 | if (!info->shared) | |
5bd4f169 | 3895 | { |
dc810e39 | 3896 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
5bd4f169 AM |
3897 | return false; |
3898 | } | |
3899 | ||
65f38f15 | 3900 | if (htab->splt->_raw_size != 0) |
5bd4f169 | 3901 | { |
dc810e39 AM |
3902 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
3903 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3904 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
5d1634d7 AM |
3905 | || !add_dynamic_entry (DT_JMPREL, 0) |
3906 | || !add_dynamic_entry (DT_PPC64_GLINK, 0)) | |
5bd4f169 AM |
3907 | return false; |
3908 | } | |
3909 | ||
19397422 AM |
3910 | if (NO_OPD_RELOCS) |
3911 | { | |
3912 | if (!add_dynamic_entry (DT_PPC64_OPD, 0) | |
3913 | || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) | |
3914 | return false; | |
3915 | } | |
3916 | ||
5bd4f169 AM |
3917 | if (relocs) |
3918 | { | |
dc810e39 AM |
3919 | if (!add_dynamic_entry (DT_RELA, 0) |
3920 | || !add_dynamic_entry (DT_RELASZ, 0) | |
3921 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
5bd4f169 | 3922 | return false; |
5bd4f169 | 3923 | |
65f38f15 AM |
3924 | /* If any dynamic relocs apply to a read-only section, |
3925 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
3926 | if ((info->flags & DF_TEXTREL) == 0) |
3927 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
3928 | (PTR) info); | |
5bd4f169 | 3929 | |
65f38f15 | 3930 | if ((info->flags & DF_TEXTREL) != 0) |
5bd4f169 | 3931 | { |
65f38f15 AM |
3932 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
3933 | return false; | |
5bd4f169 | 3934 | } |
5bd4f169 | 3935 | } |
5bd4f169 | 3936 | } |
65f38f15 | 3937 | #undef add_dynamic_entry |
5bd4f169 AM |
3938 | |
3939 | return true; | |
3940 | } | |
3941 | ||
721956f4 | 3942 | /* Determine the type of stub needed, if any, for a call. */ |
5bd4f169 | 3943 | |
721956f4 AM |
3944 | static INLINE enum ppc_stub_type |
3945 | ppc_type_of_stub (input_sec, rel, hash, destination) | |
3946 | asection *input_sec; | |
3947 | const Elf_Internal_Rela *rel; | |
3948 | struct ppc_link_hash_entry **hash; | |
3949 | bfd_vma destination; | |
5bd4f169 | 3950 | { |
721956f4 AM |
3951 | struct ppc_link_hash_entry *h = *hash; |
3952 | bfd_vma location; | |
3953 | bfd_vma branch_offset; | |
3954 | bfd_vma max_branch_offset; | |
3955 | unsigned int r_type; | |
5bd4f169 | 3956 | |
721956f4 AM |
3957 | if (h != NULL) |
3958 | { | |
3959 | if (h->oh != NULL | |
3960 | && h->oh->plt.offset != (bfd_vma) -1 | |
3961 | && h->oh->dynindx != -1) | |
5bd4f169 | 3962 | { |
721956f4 AM |
3963 | *hash = (struct ppc_link_hash_entry *) h->oh; |
3964 | return ppc_stub_plt_call; | |
5bd4f169 AM |
3965 | } |
3966 | ||
721956f4 AM |
3967 | if (h->elf.root.type == bfd_link_hash_undefweak |
3968 | || h->elf.root.type == bfd_link_hash_undefined) | |
3969 | return ppc_stub_none; | |
5d1634d7 | 3970 | } |
5d1634d7 | 3971 | |
721956f4 AM |
3972 | /* Determine where the call point is. */ |
3973 | location = (input_sec->output_offset | |
3974 | + input_sec->output_section->vma | |
3975 | + rel->r_offset); | |
5d1634d7 | 3976 | |
721956f4 AM |
3977 | branch_offset = destination - location; |
3978 | r_type = ELF64_R_TYPE (rel->r_info); | |
5d1634d7 | 3979 | |
721956f4 AM |
3980 | /* Determine if a long branch stub is needed. */ |
3981 | max_branch_offset = 1 << 25; | |
3982 | if (r_type != (unsigned int) R_PPC64_REL24) | |
3983 | max_branch_offset = 1 << 15; | |
5d1634d7 | 3984 | |
721956f4 AM |
3985 | if (branch_offset + max_branch_offset >= 2 * max_branch_offset) |
3986 | /* We need a stub. Figure out whether a long_branch or plt_branch | |
3987 | is needed later. */ | |
3988 | return ppc_stub_long_branch; | |
5d1634d7 | 3989 | |
721956f4 | 3990 | return ppc_stub_none; |
5d1634d7 AM |
3991 | } |
3992 | ||
3993 | /* Build a .plt call stub. */ | |
3994 | ||
3995 | static bfd_byte * | |
3996 | build_plt_stub (obfd, p, offset, glink) | |
3997 | bfd *obfd; | |
3998 | bfd_byte *p; | |
3999 | int offset; | |
4000 | int glink; | |
4001 | { | |
4002 | #define PPC_LO(v) ((v) & 0xffff) | |
4003 | #define PPC_HI(v) (((v) >> 16) & 0xffff) | |
4004 | #define PPC_HA(v) PPC_HI ((v) + 0x8000) | |
4005 | ||
4006 | if (glink) | |
4007 | bfd_put_32 (obfd, LD_R2_40R1, p), p += 4; | |
4008 | bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; | |
4009 | if (!glink) | |
4010 | bfd_put_32 (obfd, STD_R2_40R1, p), p += 4; | |
4011 | bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; | |
4012 | if (PPC_HA (offset + 8) != PPC_HA (offset)) | |
4013 | bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4; | |
4014 | offset += 8; | |
4015 | bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4; | |
4016 | if (PPC_HA (offset + 8) != PPC_HA (offset)) | |
4017 | bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4; | |
4018 | offset += 8; | |
4019 | bfd_put_32 (obfd, MTCTR_R11, p), p += 4; | |
4020 | bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; | |
4021 | bfd_put_32 (obfd, BCTR, p), p += 4; | |
4022 | return p; | |
4023 | } | |
4024 | ||
5d1634d7 | 4025 | static boolean |
721956f4 AM |
4026 | ppc_build_one_stub (gen_entry, in_arg) |
4027 | struct bfd_hash_entry *gen_entry; | |
4028 | PTR in_arg; | |
5d1634d7 | 4029 | { |
721956f4 AM |
4030 | struct ppc_stub_hash_entry *stub_entry; |
4031 | struct ppc_branch_hash_entry *br_entry; | |
5d1634d7 AM |
4032 | struct bfd_link_info *info; |
4033 | struct ppc_link_hash_table *htab; | |
721956f4 AM |
4034 | asection *stub_sec; |
4035 | bfd *stub_bfd; | |
4036 | bfd_byte *loc; | |
4037 | bfd_byte *p; | |
4038 | unsigned int indx; | |
4039 | bfd_vma off; | |
4040 | int size; | |
5d1634d7 | 4041 | |
721956f4 AM |
4042 | /* Massage our args to the form they really have. */ |
4043 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; | |
4044 | info = (struct bfd_link_info *) in_arg; | |
5d1634d7 | 4045 | |
5d1634d7 | 4046 | htab = ppc_hash_table (info); |
721956f4 | 4047 | stub_sec = stub_entry->stub_sec; |
5d1634d7 | 4048 | |
721956f4 AM |
4049 | /* Make a note of the offset within the stubs for this entry. */ |
4050 | stub_entry->stub_offset = stub_sec->_cooked_size; | |
4051 | loc = stub_sec->contents + stub_entry->stub_offset; | |
4052 | ||
4053 | stub_bfd = stub_sec->owner; | |
4054 | ||
4055 | switch (stub_entry->stub_type) | |
5d1634d7 | 4056 | { |
721956f4 AM |
4057 | case ppc_stub_long_branch: |
4058 | /* Branches are relative. This is where we are going to. */ | |
4059 | off = (stub_entry->target_value | |
4060 | + stub_entry->target_section->output_offset | |
4061 | + stub_entry->target_section->output_section->vma); | |
5d1634d7 | 4062 | |
721956f4 AM |
4063 | /* And this is where we are coming from. */ |
4064 | off -= (stub_entry->stub_offset | |
4065 | + stub_sec->output_offset | |
4066 | + stub_sec->output_section->vma); | |
e86ce104 | 4067 | |
721956f4 | 4068 | BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26)); |
e86ce104 | 4069 | |
721956f4 AM |
4070 | bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc); |
4071 | size = 4; | |
4072 | break; | |
e86ce104 | 4073 | |
721956f4 AM |
4074 | case ppc_stub_plt_branch: |
4075 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, | |
4076 | stub_entry->root.string + 9, | |
4077 | false, false); | |
4078 | if (br_entry == NULL) | |
4079 | { | |
4080 | (*_bfd_error_handler) (_("can't find branch stub `%s'"), | |
4081 | stub_entry->root.string + 9); | |
4082 | htab->stub_error = true; | |
4083 | return false; | |
4084 | } | |
4085 | ||
4086 | off = (stub_entry->target_value | |
4087 | + stub_entry->target_section->output_offset | |
4088 | + stub_entry->target_section->output_section->vma); | |
4089 | ||
4090 | bfd_put_64 (htab->sbrlt->owner, off, | |
4091 | htab->sbrlt->contents + br_entry->offset); | |
4092 | ||
4093 | if (info->shared) | |
4094 | { | |
4095 | /* Create a reloc for the branch lookup table entry. */ | |
4096 | Elf_Internal_Rela rela; | |
4097 | Elf64_External_Rela *r; | |
5d1634d7 | 4098 | |
721956f4 AM |
4099 | rela.r_offset = (br_entry->offset |
4100 | + htab->sbrlt->output_offset | |
4101 | + htab->sbrlt->output_section->vma); | |
4102 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); | |
4103 | rela.r_addend = off; | |
4104 | ||
4105 | r = (Elf64_External_Rela *) htab->srelbrlt->contents; | |
4106 | r += htab->srelbrlt->reloc_count++; | |
4107 | bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, r); | |
4108 | } | |
4109 | ||
4110 | off = (br_entry->offset | |
4111 | + htab->sbrlt->output_offset | |
4112 | + htab->sbrlt->output_section->vma | |
4113 | - elf_gp (htab->sbrlt->output_section->owner) | |
4114 | - TOC_BASE_OFF); | |
4115 | ||
4116 | if (off + 0x80000000 > 0xffffffff || (off & 7) != 0) | |
5d1634d7 AM |
4117 | { |
4118 | (*_bfd_error_handler) | |
e86ce104 | 4119 | (_("linkage table error against `%s'"), |
721956f4 | 4120 | stub_entry->root.string); |
5d1634d7 | 4121 | bfd_set_error (bfd_error_bad_value); |
721956f4 | 4122 | htab->stub_error = true; |
5d1634d7 AM |
4123 | return false; |
4124 | } | |
41bd81ab | 4125 | |
721956f4 AM |
4126 | indx = off; |
4127 | bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc); | |
4128 | bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4); | |
4129 | bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8); | |
4130 | bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12); | |
4131 | size = 16; | |
4132 | break; | |
5d1634d7 | 4133 | |
721956f4 | 4134 | case ppc_stub_plt_call: |
5d1634d7 | 4135 | /* Build the .glink lazy link call stub. */ |
721956f4 AM |
4136 | p = htab->sglink->contents + htab->sglink->_cooked_size; |
4137 | indx = htab->sglink->reloc_count; | |
5d1634d7 AM |
4138 | if (indx < 0x8000) |
4139 | { | |
721956f4 | 4140 | bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p); |
5d1634d7 AM |
4141 | p += 4; |
4142 | } | |
4143 | else | |
4144 | { | |
721956f4 | 4145 | bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p); |
5d1634d7 | 4146 | p += 4; |
721956f4 | 4147 | bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p); |
5d1634d7 AM |
4148 | p += 4; |
4149 | } | |
721956f4 AM |
4150 | bfd_put_32 (htab->sglink->owner, |
4151 | B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p); | |
5d1634d7 | 4152 | p += 4; |
721956f4 AM |
4153 | htab->sglink->_cooked_size = p - htab->sglink->contents; |
4154 | htab->sglink->reloc_count += 1; | |
4155 | ||
4156 | /* Now build the stub. */ | |
4157 | off = stub_entry->h->elf.plt.offset; | |
4158 | if (off >= (bfd_vma) -2) | |
4159 | abort (); | |
4160 | ||
4161 | off &= ~ (bfd_vma) 1; | |
4162 | off += (htab->splt->output_offset | |
4163 | + htab->splt->output_section->vma | |
4164 | - elf_gp (htab->splt->output_section->owner) | |
4165 | - TOC_BASE_OFF); | |
4166 | ||
4167 | if (off + 0x80000000 > 0xffffffff || (off & 7) != 0) | |
4168 | { | |
4169 | (*_bfd_error_handler) | |
4170 | (_("linkage table error against `%s'"), | |
4171 | stub_entry->h->elf.root.root.string); | |
4172 | bfd_set_error (bfd_error_bad_value); | |
4173 | htab->stub_error = true; | |
4174 | return false; | |
4175 | } | |
4176 | ||
4177 | p = build_plt_stub (stub_bfd, loc, (int) off, 0); | |
4178 | size = p - loc; | |
4179 | break; | |
4180 | ||
4181 | default: | |
4182 | BFD_FAIL (); | |
4183 | return false; | |
4184 | } | |
4185 | ||
4186 | stub_sec->_cooked_size += size; | |
4187 | return true; | |
4188 | } | |
4189 | ||
4190 | /* As above, but don't actually build the stub. Just bump offset so | |
4191 | we know stub section sizes, and select plt_branch stubs where | |
4192 | long_branch stubs won't do. */ | |
4193 | ||
4194 | static boolean | |
4195 | ppc_size_one_stub (gen_entry, in_arg) | |
4196 | struct bfd_hash_entry *gen_entry; | |
4197 | PTR in_arg; | |
4198 | { | |
4199 | struct ppc_stub_hash_entry *stub_entry; | |
4200 | struct ppc_link_hash_table *htab; | |
4201 | bfd_vma off; | |
4202 | int size; | |
4203 | ||
4204 | /* Massage our args to the form they really have. */ | |
4205 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; | |
4206 | htab = (struct ppc_link_hash_table *) in_arg; | |
4207 | ||
4208 | if (stub_entry->stub_type == ppc_stub_plt_call) | |
4209 | { | |
4210 | off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1; | |
4211 | off += (htab->splt->output_offset | |
4212 | + htab->splt->output_section->vma | |
4213 | - elf_gp (htab->splt->output_section->owner) | |
4214 | - TOC_BASE_OFF); | |
4215 | ||
4216 | size = 28; | |
4217 | if (PPC_HA ((int) off + 16) != PPC_HA ((int) off)) | |
4218 | size += 4; | |
4219 | } | |
4220 | else | |
4221 | { | |
4222 | /* ppc_stub_long_branch or ppc_stub_plt_branch. */ | |
4223 | stub_entry->stub_type = ppc_stub_long_branch; | |
4224 | size = 4; | |
4225 | ||
4226 | off = (stub_entry->target_value | |
4227 | + stub_entry->target_section->output_offset | |
4228 | + stub_entry->target_section->output_section->vma); | |
4229 | off -= (stub_entry->stub_sec->_raw_size | |
4230 | + stub_entry->stub_sec->output_offset | |
4231 | + stub_entry->stub_sec->output_section->vma); | |
4232 | ||
4233 | if (off + (1 << 25) >= (bfd_vma) (1 << 26)) | |
4234 | { | |
4235 | struct ppc_branch_hash_entry *br_entry; | |
4236 | ||
4237 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, | |
4238 | stub_entry->root.string + 9, | |
4239 | true, false); | |
4240 | if (br_entry == NULL) | |
4241 | { | |
4242 | (*_bfd_error_handler) (_("can't build branch stub `%s'"), | |
4243 | stub_entry->root.string + 9); | |
4244 | htab->stub_error = true; | |
4245 | return false; | |
4246 | } | |
4247 | ||
4248 | if (br_entry->iter != htab->stub_iteration) | |
4249 | { | |
4250 | br_entry->iter = htab->stub_iteration; | |
4251 | br_entry->offset = htab->sbrlt->_raw_size; | |
4252 | htab->sbrlt->_raw_size += 8; | |
4253 | } | |
4254 | stub_entry->stub_type = ppc_stub_plt_branch; | |
4255 | size = 16; | |
4256 | } | |
4257 | } | |
4258 | ||
4259 | stub_entry->stub_sec->_raw_size += size; | |
4260 | return true; | |
4261 | } | |
4262 | ||
4263 | /* Set up various things so that we can make a list of input sections | |
4264 | for each output section included in the link. Returns -1 on error, | |
4265 | 0 when no stubs will be needed, and 1 on success. */ | |
4266 | ||
4267 | int | |
4268 | ppc64_elf_setup_section_lists (output_bfd, info) | |
4269 | bfd *output_bfd; | |
4270 | struct bfd_link_info *info; | |
4271 | { | |
4272 | bfd *input_bfd; | |
4273 | unsigned int bfd_count; | |
4274 | int top_id, top_index; | |
4275 | asection *section; | |
4276 | asection **input_list, **list; | |
4277 | bfd_size_type amt; | |
4278 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
4279 | ||
805fc799 AM |
4280 | if (htab->elf.root.creator->flavour != bfd_target_elf_flavour |
4281 | || htab->sbrlt == NULL) | |
721956f4 AM |
4282 | return 0; |
4283 | ||
4284 | /* Count the number of input BFDs and find the top input section id. */ | |
4285 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
4286 | input_bfd != NULL; | |
4287 | input_bfd = input_bfd->link_next) | |
4288 | { | |
4289 | bfd_count += 1; | |
4290 | for (section = input_bfd->sections; | |
4291 | section != NULL; | |
4292 | section = section->next) | |
4293 | { | |
4294 | if (top_id < section->id) | |
4295 | top_id = section->id; | |
4296 | } | |
4297 | } | |
4298 | htab->bfd_count = bfd_count; | |
4299 | ||
4300 | amt = sizeof (struct map_stub) * (top_id + 1); | |
4301 | htab->stub_group = (struct map_stub *) bfd_zmalloc (amt); | |
4302 | if (htab->stub_group == NULL) | |
4303 | return -1; | |
4304 | ||
4305 | /* We can't use output_bfd->section_count here to find the top output | |
4306 | section index as some sections may have been removed, and | |
4307 | _bfd_strip_section_from_output doesn't renumber the indices. */ | |
4308 | for (section = output_bfd->sections, top_index = 0; | |
4309 | section != NULL; | |
4310 | section = section->next) | |
4311 | { | |
4312 | if (top_index < section->index) | |
4313 | top_index = section->index; | |
4314 | } | |
4315 | ||
4316 | htab->top_index = top_index; | |
4317 | amt = sizeof (asection *) * (top_index + 1); | |
4318 | input_list = (asection **) bfd_malloc (amt); | |
4319 | htab->input_list = input_list; | |
4320 | if (input_list == NULL) | |
4321 | return -1; | |
4322 | ||
4323 | /* For sections we aren't interested in, mark their entries with a | |
4324 | value we can check later. */ | |
4325 | list = input_list + top_index; | |
4326 | do | |
4327 | *list = bfd_abs_section_ptr; | |
4328 | while (list-- != input_list); | |
4329 | ||
4330 | for (section = output_bfd->sections; | |
4331 | section != NULL; | |
4332 | section = section->next) | |
4333 | { | |
4334 | if ((section->flags & SEC_CODE) != 0) | |
4335 | input_list[section->index] = NULL; | |
4336 | } | |
4337 | ||
4338 | return 1; | |
4339 | } | |
4340 | ||
4341 | /* The linker repeatedly calls this function for each input section, | |
4342 | in the order that input sections are linked into output sections. | |
4343 | Build lists of input sections to determine groupings between which | |
4344 | we may insert linker stubs. */ | |
4345 | ||
4346 | void | |
805fc799 | 4347 | ppc64_elf_next_input_section (info, isec) |
721956f4 AM |
4348 | struct bfd_link_info *info; |
4349 | asection *isec; | |
4350 | { | |
4351 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
4352 | ||
805fc799 | 4353 | if (isec->output_section->index <= htab->top_index) |
721956f4 AM |
4354 | { |
4355 | asection **list = htab->input_list + isec->output_section->index; | |
4356 | if (*list != bfd_abs_section_ptr) | |
4357 | { | |
4358 | /* Steal the link_sec pointer for our list. */ | |
4359 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) | |
4360 | /* This happens to make the list in reverse order, | |
4361 | which is what we want. */ | |
4362 | PREV_SEC (isec) = *list; | |
4363 | *list = isec; | |
4364 | } | |
4365 | } | |
4366 | } | |
4367 | ||
4368 | /* See whether we can group stub sections together. Grouping stub | |
4369 | sections may result in fewer stubs. More importantly, we need to | |
4370 | put all .init* and .fini* stubs at the beginning of the .init or | |
4371 | .fini output sections respectively, because glibc splits the | |
4372 | _init and _fini functions into multiple parts. Putting a stub in | |
4373 | the middle of a function is not a good idea. */ | |
4374 | ||
4375 | static void | |
4376 | group_sections (htab, stub_group_size, stubs_always_before_branch) | |
4377 | struct ppc_link_hash_table *htab; | |
4378 | bfd_size_type stub_group_size; | |
4379 | boolean stubs_always_before_branch; | |
4380 | { | |
4381 | asection **list = htab->input_list + htab->top_index; | |
4382 | do | |
4383 | { | |
4384 | asection *tail = *list; | |
4385 | if (tail == bfd_abs_section_ptr) | |
4386 | continue; | |
4387 | while (tail != NULL) | |
4388 | { | |
4389 | asection *curr; | |
4390 | asection *prev; | |
4391 | bfd_size_type total; | |
4392 | ||
4393 | curr = tail; | |
4394 | if (tail->_cooked_size) | |
4395 | total = tail->_cooked_size; | |
4396 | else | |
4397 | total = tail->_raw_size; | |
4398 | while ((prev = PREV_SEC (curr)) != NULL | |
4399 | && ((total += curr->output_offset - prev->output_offset) | |
4400 | < stub_group_size)) | |
4401 | curr = prev; | |
4402 | ||
4403 | /* OK, the size from the start of CURR to the end is less | |
4404 | than stub_group_size and thus can be handled by one stub | |
4405 | section. (or the tail section is itself larger than | |
4406 | stub_group_size, in which case we may be toast.) We | |
4407 | should really be keeping track of the total size of stubs | |
4408 | added here, as stubs contribute to the final output | |
4409 | section size. That's a little tricky, and this way will | |
4410 | only break if stubs added make the total size more than | |
4411 | 2^25, ie. for the default stub_group_size, if stubs total | |
4412 | more than 2834432 bytes, or over 100000 plt call stubs. */ | |
4413 | do | |
4414 | { | |
4415 | prev = PREV_SEC (tail); | |
4416 | /* Set up this stub group. */ | |
4417 | htab->stub_group[tail->id].link_sec = curr; | |
4418 | } | |
4419 | while (tail != curr && (tail = prev) != NULL); | |
4420 | ||
4421 | /* But wait, there's more! Input sections up to stub_group_size | |
4422 | bytes before the stub section can be handled by it too. */ | |
4423 | if (!stubs_always_before_branch) | |
4424 | { | |
4425 | total = 0; | |
4426 | while (prev != NULL | |
4427 | && ((total += tail->output_offset - prev->output_offset) | |
4428 | < stub_group_size)) | |
4429 | { | |
4430 | tail = prev; | |
4431 | prev = PREV_SEC (tail); | |
4432 | htab->stub_group[tail->id].link_sec = curr; | |
4433 | } | |
4434 | } | |
4435 | tail = prev; | |
4436 | } | |
4437 | } | |
4438 | while (list-- != htab->input_list); | |
4439 | free (htab->input_list); | |
4440 | #undef PREV_SEC | |
4441 | } | |
4442 | ||
4443 | /* Read in all local syms for all input bfds. */ | |
4444 | ||
4445 | static boolean | |
4446 | get_local_syms (input_bfd, htab) | |
4447 | bfd *input_bfd; | |
4448 | struct ppc_link_hash_table *htab; | |
4449 | { | |
4450 | unsigned int bfd_indx; | |
4451 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
4452 | ||
4453 | /* We want to read in symbol extension records only once. To do this | |
4454 | we need to read in the local symbols in parallel and save them for | |
4455 | later use; so hold pointers to the local symbols in an array. */ | |
4456 | bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; | |
4457 | all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); | |
4458 | htab->all_local_syms = all_local_syms; | |
4459 | if (all_local_syms == NULL) | |
4460 | return false; | |
4461 | ||
4462 | /* Walk over all the input BFDs, swapping in local symbols. | |
4463 | If we are creating a shared library, create hash entries for the | |
4464 | export stubs. */ | |
4465 | for (bfd_indx = 0; | |
4466 | input_bfd != NULL; | |
4467 | input_bfd = input_bfd->link_next, bfd_indx++) | |
4468 | { | |
4469 | Elf_Internal_Shdr *symtab_hdr; | |
4470 | Elf_Internal_Shdr *shndx_hdr; | |
4471 | Elf_Internal_Sym *isym; | |
4472 | Elf64_External_Sym *ext_syms, *esym, *end_sy; | |
4473 | Elf_External_Sym_Shndx *shndx_buf, *shndx; | |
4474 | bfd_size_type sec_size; | |
4475 | ||
4476 | /* We'll need the symbol table in a second. */ | |
4477 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
4478 | if (symtab_hdr->sh_info == 0) | |
4479 | continue; | |
4480 | ||
4481 | /* We need an array of the local symbols attached to the input bfd. | |
4482 | Unfortunately, we're going to have to read & swap them in. */ | |
4483 | sec_size = symtab_hdr->sh_info; | |
4484 | sec_size *= sizeof (Elf_Internal_Sym); | |
4485 | local_syms = (Elf_Internal_Sym *) bfd_malloc (sec_size); | |
4486 | if (local_syms == NULL) | |
4487 | return false; | |
4488 | ||
4489 | all_local_syms[bfd_indx] = local_syms; | |
4490 | sec_size = symtab_hdr->sh_info; | |
4491 | sec_size *= sizeof (Elf64_External_Sym); | |
4492 | ext_syms = (Elf64_External_Sym *) bfd_malloc (sec_size); | |
4493 | if (ext_syms == NULL) | |
4494 | return false; | |
4495 | ||
4496 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
4497 | || bfd_bread ((PTR) ext_syms, sec_size, input_bfd) != sec_size) | |
4498 | { | |
4499 | error_ret_free_ext_syms: | |
4500 | free (ext_syms); | |
4501 | return false; | |
4502 | } | |
4503 | ||
4504 | shndx_buf = NULL; | |
4505 | shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr; | |
4506 | if (shndx_hdr->sh_size != 0) | |
4507 | { | |
4508 | sec_size = symtab_hdr->sh_info; | |
4509 | sec_size *= sizeof (Elf_External_Sym_Shndx); | |
4510 | shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (sec_size); | |
4511 | if (shndx_buf == NULL) | |
4512 | goto error_ret_free_ext_syms; | |
4513 | ||
4514 | if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0 | |
4515 | || bfd_bread ((PTR) shndx_buf, sec_size, input_bfd) != sec_size) | |
4516 | { | |
4517 | free (shndx_buf); | |
4518 | goto error_ret_free_ext_syms; | |
4519 | } | |
4520 | } | |
4521 | ||
4522 | /* Swap the local symbols in. */ | |
4523 | for (esym = ext_syms, end_sy = esym + symtab_hdr->sh_info, | |
4524 | isym = local_syms, shndx = shndx_buf; | |
4525 | esym < end_sy; | |
4526 | esym++, isym++, shndx = (shndx ? shndx + 1 : NULL)) | |
4527 | bfd_elf64_swap_symbol_in (input_bfd, esym, shndx, isym); | |
4528 | ||
4529 | /* Now we can free the external symbols. */ | |
4530 | free (shndx_buf); | |
4531 | free (ext_syms); | |
5bd4f169 | 4532 | } |
721956f4 | 4533 | |
5d1634d7 AM |
4534 | return true; |
4535 | } | |
5bd4f169 | 4536 | |
721956f4 AM |
4537 | /* Determine and set the size of the stub section for a final link. |
4538 | ||
4539 | The basic idea here is to examine all the relocations looking for | |
4540 | PC-relative calls to a target that is unreachable with a "bl" | |
4541 | instruction. */ | |
4542 | ||
4543 | boolean | |
4544 | ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size, | |
4545 | add_stub_section, layout_sections_again) | |
4546 | bfd *output_bfd; | |
4547 | bfd *stub_bfd; | |
4548 | struct bfd_link_info *info; | |
4549 | bfd_signed_vma group_size; | |
4550 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); | |
4551 | void (*layout_sections_again) PARAMS ((void)); | |
4552 | { | |
4553 | bfd_size_type stub_group_size; | |
4554 | boolean stubs_always_before_branch; | |
4555 | boolean ret = false; | |
4556 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
4557 | ||
4558 | /* Stash our params away. */ | |
4559 | htab->stub_bfd = stub_bfd; | |
4560 | htab->add_stub_section = add_stub_section; | |
4561 | htab->layout_sections_again = layout_sections_again; | |
4562 | stubs_always_before_branch = group_size < 0; | |
4563 | if (group_size < 0) | |
4564 | stub_group_size = -group_size; | |
4565 | else | |
4566 | stub_group_size = group_size; | |
4567 | if (stub_group_size == 1) | |
4568 | { | |
4569 | /* Default values. */ | |
4570 | stub_group_size = 30720000; | |
4571 | if (htab->has_14bit_branch) | |
4572 | stub_group_size = 30000; | |
4573 | } | |
4574 | ||
4575 | group_sections (htab, stub_group_size, stubs_always_before_branch); | |
4576 | ||
4577 | if (! get_local_syms (info->input_bfds, htab)) | |
4578 | { | |
4579 | if (htab->all_local_syms) | |
4580 | goto error_ret_free_local; | |
4581 | return false; | |
4582 | } | |
4583 | ||
4584 | while (1) | |
4585 | { | |
4586 | bfd *input_bfd; | |
4587 | unsigned int bfd_indx; | |
4588 | asection *stub_sec; | |
4589 | boolean stub_changed; | |
4590 | ||
4591 | htab->stub_iteration += 1; | |
4592 | stub_changed = false; | |
4593 | ||
4594 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
4595 | input_bfd != NULL; | |
4596 | input_bfd = input_bfd->link_next, bfd_indx++) | |
4597 | { | |
4598 | Elf_Internal_Shdr *symtab_hdr; | |
4599 | asection *section; | |
4600 | Elf_Internal_Sym *local_syms; | |
4601 | ||
4602 | /* We'll need the symbol table in a second. */ | |
4603 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
4604 | if (symtab_hdr->sh_info == 0) | |
4605 | continue; | |
4606 | ||
4607 | local_syms = htab->all_local_syms[bfd_indx]; | |
4608 | ||
4609 | /* Walk over each section attached to the input bfd. */ | |
4610 | for (section = input_bfd->sections; | |
4611 | section != NULL; | |
4612 | section = section->next) | |
4613 | { | |
4614 | Elf_Internal_Shdr *input_rel_hdr; | |
4615 | Elf64_External_Rela *external_relocs, *erelaend, *erela; | |
4616 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
4617 | bfd_size_type amt; | |
4618 | ||
4619 | /* If there aren't any relocs, then there's nothing more | |
4620 | to do. */ | |
4621 | if ((section->flags & SEC_RELOC) == 0 | |
4622 | || section->reloc_count == 0) | |
4623 | continue; | |
4624 | ||
4625 | /* If this section is a link-once section that will be | |
4626 | discarded, then don't create any stubs. */ | |
4627 | if (section->output_section == NULL | |
4628 | || section->output_section->owner != output_bfd) | |
4629 | continue; | |
4630 | ||
4631 | /* Allocate space for the external relocations. */ | |
4632 | amt = section->reloc_count; | |
4633 | amt *= sizeof (Elf64_External_Rela); | |
4634 | external_relocs = (Elf64_External_Rela *) bfd_malloc (amt); | |
4635 | if (external_relocs == NULL) | |
4636 | { | |
4637 | goto error_ret_free_local; | |
4638 | } | |
4639 | ||
4640 | /* Likewise for the internal relocations. */ | |
4641 | amt = section->reloc_count; | |
4642 | amt *= sizeof (Elf_Internal_Rela); | |
4643 | internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); | |
4644 | if (internal_relocs == NULL) | |
4645 | { | |
4646 | free (external_relocs); | |
4647 | goto error_ret_free_local; | |
4648 | } | |
4649 | ||
4650 | /* Read in the external relocs. */ | |
4651 | input_rel_hdr = &elf_section_data (section)->rel_hdr; | |
4652 | if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0 | |
4653 | || bfd_bread ((PTR) external_relocs, | |
4654 | input_rel_hdr->sh_size, | |
4655 | input_bfd) != input_rel_hdr->sh_size) | |
4656 | { | |
4657 | free (external_relocs); | |
4658 | error_ret_free_internal: | |
4659 | free (internal_relocs); | |
4660 | goto error_ret_free_local; | |
4661 | } | |
4662 | ||
4663 | /* Swap in the relocs. */ | |
4664 | erela = external_relocs; | |
4665 | erelaend = erela + section->reloc_count; | |
4666 | irela = internal_relocs; | |
4667 | for (; erela < erelaend; erela++, irela++) | |
4668 | bfd_elf64_swap_reloca_in (input_bfd, erela, irela); | |
4669 | ||
4670 | /* We're done with the external relocs, free them. */ | |
4671 | free (external_relocs); | |
4672 | ||
4673 | /* Now examine each relocation. */ | |
4674 | irela = internal_relocs; | |
4675 | irelaend = irela + section->reloc_count; | |
4676 | for (; irela < irelaend; irela++) | |
4677 | { | |
4678 | unsigned int r_type, r_indx; | |
4679 | enum ppc_stub_type stub_type; | |
4680 | struct ppc_stub_hash_entry *stub_entry; | |
4681 | asection *sym_sec; | |
4682 | bfd_vma sym_value; | |
4683 | bfd_vma destination; | |
4684 | struct ppc_link_hash_entry *hash; | |
4685 | char *stub_name; | |
4686 | const asection *id_sec; | |
4687 | ||
4688 | r_type = ELF64_R_TYPE (irela->r_info); | |
4689 | r_indx = ELF64_R_SYM (irela->r_info); | |
4690 | ||
4691 | if (r_type >= (unsigned int) R_PPC_max) | |
4692 | { | |
4693 | bfd_set_error (bfd_error_bad_value); | |
4694 | goto error_ret_free_internal; | |
4695 | } | |
4696 | ||
4697 | /* Only look for stubs on branch instructions. */ | |
4698 | if (r_type != (unsigned int) R_PPC64_REL24 | |
4699 | && r_type != (unsigned int) R_PPC64_REL14 | |
4700 | && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN | |
4701 | && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN) | |
4702 | continue; | |
4703 | ||
4704 | /* Now determine the call target, its name, value, | |
4705 | section. */ | |
4706 | sym_sec = NULL; | |
4707 | sym_value = 0; | |
4708 | destination = 0; | |
4709 | hash = NULL; | |
4710 | if (r_indx < symtab_hdr->sh_info) | |
4711 | { | |
4712 | /* It's a local symbol. */ | |
4713 | Elf_Internal_Sym *sym; | |
4714 | Elf_Internal_Shdr *hdr; | |
4715 | ||
4716 | sym = local_syms + r_indx; | |
4717 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
4718 | sym_sec = hdr->bfd_section; | |
4719 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
4720 | sym_value = sym->st_value; | |
4721 | destination = (sym_value + irela->r_addend | |
4722 | + sym_sec->output_offset | |
4723 | + sym_sec->output_section->vma); | |
4724 | } | |
4725 | else | |
4726 | { | |
4727 | /* It's an external symbol. */ | |
4728 | int e_indx; | |
4729 | ||
4730 | e_indx = r_indx - symtab_hdr->sh_info; | |
4731 | hash = ((struct ppc_link_hash_entry *) | |
4732 | elf_sym_hashes (input_bfd)[e_indx]); | |
4733 | ||
4734 | while (hash->elf.root.type == bfd_link_hash_indirect | |
4735 | || hash->elf.root.type == bfd_link_hash_warning) | |
4736 | hash = ((struct ppc_link_hash_entry *) | |
4737 | hash->elf.root.u.i.link); | |
4738 | ||
4739 | if (hash->elf.root.type == bfd_link_hash_defined | |
4740 | || hash->elf.root.type == bfd_link_hash_defweak) | |
4741 | { | |
4742 | sym_sec = hash->elf.root.u.def.section; | |
4743 | sym_value = hash->elf.root.u.def.value; | |
4744 | if (sym_sec->output_section != NULL) | |
4745 | destination = (sym_value + irela->r_addend | |
4746 | + sym_sec->output_offset | |
4747 | + sym_sec->output_section->vma); | |
4748 | } | |
4749 | else if (hash->elf.root.type == bfd_link_hash_undefweak) | |
4750 | ; | |
4751 | else if (hash->elf.root.type == bfd_link_hash_undefined) | |
4752 | ; | |
4753 | else | |
4754 | { | |
4755 | bfd_set_error (bfd_error_bad_value); | |
4756 | goto error_ret_free_internal; | |
4757 | } | |
4758 | } | |
4759 | ||
4760 | /* Determine what (if any) linker stub is needed. */ | |
4761 | stub_type = ppc_type_of_stub (section, irela, &hash, | |
4762 | destination); | |
4763 | if (stub_type == ppc_stub_none) | |
4764 | continue; | |
4765 | ||
4766 | /* Support for grouping stub sections. */ | |
4767 | id_sec = htab->stub_group[section->id].link_sec; | |
4768 | ||
4769 | /* Get the name of this stub. */ | |
4770 | stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); | |
4771 | if (!stub_name) | |
4772 | goto error_ret_free_internal; | |
4773 | ||
4774 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, | |
4775 | stub_name, false, false); | |
4776 | if (stub_entry != NULL) | |
4777 | { | |
4778 | /* The proper stub has already been created. */ | |
4779 | free (stub_name); | |
4780 | continue; | |
4781 | } | |
4782 | ||
4783 | stub_entry = ppc_add_stub (stub_name, section, htab); | |
4784 | if (stub_entry == NULL) | |
4785 | { | |
4786 | free (stub_name); | |
4787 | goto error_ret_free_local; | |
4788 | } | |
4789 | ||
4790 | stub_entry->target_value = sym_value; | |
4791 | stub_entry->target_section = sym_sec; | |
4792 | stub_entry->stub_type = stub_type; | |
4793 | stub_entry->h = hash; | |
4794 | stub_changed = true; | |
4795 | } | |
4796 | ||
4797 | /* We're done with the internal relocs, free them. */ | |
4798 | free (internal_relocs); | |
4799 | } | |
4800 | } | |
4801 | ||
4802 | if (!stub_changed) | |
4803 | break; | |
4804 | ||
4805 | /* OK, we've added some stubs. Find out the new size of the | |
4806 | stub sections. */ | |
4807 | for (stub_sec = htab->stub_bfd->sections; | |
4808 | stub_sec != NULL; | |
4809 | stub_sec = stub_sec->next) | |
4810 | { | |
4811 | stub_sec->_raw_size = 0; | |
4812 | stub_sec->_cooked_size = 0; | |
4813 | } | |
4814 | htab->sbrlt->_raw_size = 0; | |
4815 | htab->sbrlt->_cooked_size = 0; | |
4816 | ||
4817 | bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab); | |
4818 | ||
4819 | /* Ask the linker to do its stuff. */ | |
4820 | (*htab->layout_sections_again) (); | |
4821 | } | |
4822 | ||
4823 | if (htab->sbrlt->_raw_size == 0) | |
4824 | { | |
4825 | _bfd_strip_section_from_output (info, htab->sbrlt); | |
4826 | if (htab->srelbrlt != NULL) | |
4827 | _bfd_strip_section_from_output (info, htab->srelbrlt); | |
4828 | } | |
4829 | ||
4830 | ret = true; | |
4831 | ||
4832 | error_ret_free_local: | |
4833 | while (htab->bfd_count-- > 0) | |
4834 | if (htab->all_local_syms[htab->bfd_count]) | |
4835 | free (htab->all_local_syms[htab->bfd_count]); | |
4836 | free (htab->all_local_syms); | |
4837 | ||
4838 | return ret; | |
4839 | } | |
4840 | ||
4841 | /* Called after we have determined section placement. If sections | |
805fc799 | 4842 | move, we'll be called again. Provide a value for TOCstart. */ |
721956f4 | 4843 | |
805fc799 AM |
4844 | bfd_vma |
4845 | ppc64_elf_toc (obfd) | |
5d1634d7 | 4846 | bfd *obfd; |
721956f4 | 4847 | { |
805fc799 AM |
4848 | asection *s; |
4849 | bfd_vma TOCstart; | |
721956f4 | 4850 | |
805fc799 AM |
4851 | /* The TOC consists of sections .got, .toc, .tocbss, .plt in that |
4852 | order. The TOC starts where the first of these sections starts. */ | |
4853 | s = bfd_get_section_by_name (obfd, ".got"); | |
4854 | if (s == NULL) | |
4855 | s = bfd_get_section_by_name (obfd, ".toc"); | |
4856 | if (s == NULL) | |
4857 | s = bfd_get_section_by_name (obfd, ".tocbss"); | |
4858 | if (s == NULL) | |
4859 | s = bfd_get_section_by_name (obfd, ".plt"); | |
4860 | if (s == NULL) | |
4861 | { | |
4862 | /* This may happen for | |
4863 | o references to TOC base (SYM@toc / TOC[tc0]) without a | |
4864 | .toc directive | |
4865 | o bad linker script | |
4866 | o --gc-sections and empty TOC sections | |
4867 | ||
4868 | FIXME: Warn user? */ | |
4869 | ||
4870 | /* Look for a likely section. We probably won't even be | |
4871 | using TOCstart. */ | |
4872 | for (s = obfd->sections; s != NULL; s = s->next) | |
4873 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY)) | |
4874 | == (SEC_ALLOC | SEC_SMALL_DATA)) | |
4875 | break; | |
721956f4 | 4876 | if (s == NULL) |
805fc799 AM |
4877 | for (s = obfd->sections; s != NULL; s = s->next) |
4878 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA)) | |
4879 | == (SEC_ALLOC | SEC_SMALL_DATA)) | |
4880 | break; | |
721956f4 | 4881 | if (s == NULL) |
805fc799 AM |
4882 | for (s = obfd->sections; s != NULL; s = s->next) |
4883 | if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) | |
4884 | break; | |
721956f4 | 4885 | if (s == NULL) |
805fc799 AM |
4886 | for (s = obfd->sections; s != NULL; s = s->next) |
4887 | if ((s->flags & SEC_ALLOC) == SEC_ALLOC) | |
4888 | break; | |
4889 | } | |
721956f4 | 4890 | |
805fc799 AM |
4891 | TOCstart = 0; |
4892 | if (s != NULL) | |
4893 | TOCstart = s->output_section->vma + s->output_offset; | |
721956f4 | 4894 | |
805fc799 | 4895 | return TOCstart; |
721956f4 AM |
4896 | } |
4897 | ||
4898 | /* Build all the stubs associated with the current output file. | |
4899 | The stubs are kept in a hash table attached to the main linker | |
4900 | hash table. This function is called via gldelf64ppc_finish. */ | |
4901 | ||
4902 | boolean | |
4903 | ppc64_elf_build_stubs (info) | |
4904 | struct bfd_link_info *info; | |
5d1634d7 AM |
4905 | { |
4906 | struct ppc_link_hash_table *htab = ppc_hash_table (info); | |
721956f4 | 4907 | asection *stub_sec; |
5d1634d7 AM |
4908 | bfd_vma plt_r2; |
4909 | bfd_byte *p; | |
4910 | ||
721956f4 AM |
4911 | for (stub_sec = htab->stub_bfd->sections; |
4912 | stub_sec != NULL; | |
4913 | stub_sec = stub_sec->next) | |
4914 | { | |
4915 | bfd_size_type size; | |
4916 | ||
4917 | /* Allocate memory to hold the linker stubs. */ | |
4918 | size = stub_sec->_raw_size; | |
4919 | if (size != 0) | |
4920 | { | |
4921 | stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size); | |
4922 | if (stub_sec->contents == NULL) | |
4923 | return false; | |
4924 | } | |
4925 | stub_sec->_cooked_size = 0; | |
4926 | } | |
5d1634d7 | 4927 | |
721956f4 | 4928 | if (htab->splt != NULL) |
5d1634d7 | 4929 | { |
721956f4 AM |
4930 | /* Build the .glink plt call stub. */ |
4931 | plt_r2 = (htab->splt->output_offset | |
4932 | + htab->splt->output_section->vma | |
4933 | - elf_gp (htab->splt->output_section->owner) | |
4934 | - TOC_BASE_OFF); | |
4935 | p = htab->sglink->contents; | |
4936 | p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1); | |
4937 | while (p - htab->sglink->contents < GLINK_CALL_STUB_SIZE) | |
4938 | { | |
4939 | bfd_put_32 (htab->sglink->owner, NOP, p); | |
4940 | p += 4; | |
4941 | } | |
4942 | htab->sglink->_cooked_size = p - htab->sglink->contents; | |
4943 | ||
4944 | /* Use reloc_count to count entries. */ | |
4945 | htab->sglink->reloc_count = 0; | |
5d1634d7 | 4946 | } |
5d1634d7 | 4947 | |
721956f4 AM |
4948 | if (htab->sbrlt->_raw_size != 0) |
4949 | { | |
4950 | htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner, | |
4951 | htab->sbrlt->_raw_size); | |
4952 | if (htab->sbrlt->contents == NULL) | |
4953 | return false; | |
4954 | } | |
5d1634d7 | 4955 | |
721956f4 AM |
4956 | /* Build the stubs as directed by the stub hash table. */ |
4957 | bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); | |
5d1634d7 AM |
4958 | htab->sglink->reloc_count = 0; |
4959 | ||
721956f4 AM |
4960 | for (stub_sec = htab->stub_bfd->sections; |
4961 | stub_sec != NULL; | |
4962 | stub_sec = stub_sec->next) | |
4963 | { | |
4964 | if (stub_sec->_raw_size != stub_sec->_cooked_size) | |
4965 | break; | |
4966 | } | |
5d1634d7 | 4967 | |
721956f4 | 4968 | if (stub_sec != NULL |
5d1634d7 AM |
4969 | || htab->sglink->_raw_size != htab->sglink->_cooked_size) |
4970 | { | |
721956f4 AM |
4971 | htab->stub_error = true; |
4972 | (*_bfd_error_handler) (_("stubs don't match calculated size")); | |
5d1634d7 | 4973 | } |
721956f4 AM |
4974 | |
4975 | return !htab->stub_error; | |
5bd4f169 AM |
4976 | } |
4977 | ||
4978 | /* Set up any other section flags and such that may be necessary. */ | |
4979 | ||
4980 | static boolean | |
4981 | ppc64_elf_fake_sections (abfd, shdr, asect) | |
4982 | bfd *abfd ATTRIBUTE_UNUSED; | |
4983 | Elf64_Internal_Shdr *shdr; | |
4984 | asection *asect; | |
4985 | { | |
4986 | if ((asect->flags & SEC_EXCLUDE) != 0) | |
4987 | shdr->sh_flags |= SHF_EXCLUDE; | |
4988 | ||
4989 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) | |
4990 | shdr->sh_type = SHT_ORDERED; | |
4991 | ||
4992 | return true; | |
4993 | } | |
4994 | ||
4995 | /* The RELOCATE_SECTION function is called by the ELF backend linker | |
4996 | to handle the relocations for a section. | |
4997 | ||
4998 | The relocs are always passed as Rela structures; if the section | |
4999 | actually uses Rel structures, the r_addend field will always be | |
5000 | zero. | |
5001 | ||
5002 | This function is responsible for adjust the section contents as | |
5003 | necessary, and (if using Rela relocs and generating a | |
5004 | relocateable output file) adjusting the reloc addend as | |
5005 | necessary. | |
5006 | ||
5007 | This function does not have to worry about setting the reloc | |
5008 | address or the reloc symbol index. | |
5009 | ||
5010 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
5011 | ||
5012 | LOCAL_SECTIONS is an array giving the section in the input file | |
5013 | corresponding to the st_shndx field of each local symbol. | |
5014 | ||
5015 | The global hash table entry for the global symbols can be found | |
5016 | via elf_sym_hashes (input_bfd). | |
5017 | ||
5018 | When generating relocateable output, this function must handle | |
5019 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
5020 | going to be the section symbol corresponding to the output | |
5021 | section, which means that the addend must be adjusted | |
5022 | accordingly. */ | |
5023 | ||
5024 | static boolean | |
5025 | ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
5026 | contents, relocs, local_syms, local_sections) | |
5027 | bfd *output_bfd; | |
5028 | struct bfd_link_info *info; | |
5029 | bfd *input_bfd; | |
5030 | asection *input_section; | |
5031 | bfd_byte *contents; | |
5032 | Elf_Internal_Rela *relocs; | |
5033 | Elf_Internal_Sym *local_syms; | |
5034 | asection **local_sections; | |
5035 | { | |
65f38f15 | 5036 | struct ppc_link_hash_table *htab; |
5bd4f169 AM |
5037 | Elf_Internal_Shdr *symtab_hdr; |
5038 | struct elf_link_hash_entry **sym_hashes; | |
5bd4f169 AM |
5039 | Elf_Internal_Rela *rel; |
5040 | Elf_Internal_Rela *relend; | |
5bd4f169 AM |
5041 | bfd_vma *local_got_offsets; |
5042 | bfd_vma TOCstart; | |
5043 | boolean ret = true; | |
41bd81ab | 5044 | boolean is_opd; |
96e0dda4 AM |
5045 | /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ |
5046 | boolean is_power4 = false; | |
5bd4f169 | 5047 | |
b491616a AM |
5048 | if (info->relocateable) |
5049 | return true; | |
5050 | ||
65f38f15 | 5051 | /* Initialize howto table if needed. */ |
5bd4f169 | 5052 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
5bd4f169 AM |
5053 | ppc_howto_init (); |
5054 | ||
65f38f15 | 5055 | htab = ppc_hash_table (info); |
5bd4f169 | 5056 | local_got_offsets = elf_local_got_offsets (input_bfd); |
5bd4f169 | 5057 | TOCstart = elf_gp (output_bfd); |
5bd4f169 AM |
5058 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
5059 | sym_hashes = elf_sym_hashes (input_bfd); | |
41bd81ab | 5060 | is_opd = strcmp (bfd_get_section_name (abfd, input_section), ".opd") == 0; |
65f38f15 | 5061 | |
5bd4f169 AM |
5062 | rel = relocs; |
5063 | relend = relocs + input_section->reloc_count; | |
5064 | for (; rel < relend; rel++) | |
5065 | { | |
5066 | enum elf_ppc_reloc_type r_type; | |
5067 | bfd_vma offset; | |
5068 | bfd_vma addend; | |
5069 | bfd_reloc_status_type r; | |
5070 | Elf_Internal_Sym *sym; | |
5071 | asection *sec; | |
5072 | struct elf_link_hash_entry *h; | |
721956f4 | 5073 | struct elf_link_hash_entry *fdh; |
5bd4f169 | 5074 | const char *sym_name; |
5bd4f169 AM |
5075 | unsigned long r_symndx; |
5076 | bfd_vma relocation; | |
65f38f15 | 5077 | boolean unresolved_reloc; |
ef60b7ff | 5078 | boolean warned; |
dc810e39 | 5079 | long insn; |
721956f4 AM |
5080 | struct ppc_stub_hash_entry *stub_entry; |
5081 | bfd_vma max_br_offset; | |
5082 | bfd_vma from; | |
5bd4f169 AM |
5083 | |
5084 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); | |
5bd4f169 | 5085 | r_symndx = ELF64_R_SYM (rel->r_info); |
65f38f15 AM |
5086 | offset = rel->r_offset; |
5087 | addend = rel->r_addend; | |
5088 | r = bfd_reloc_other; | |
5089 | sym = (Elf_Internal_Sym *) 0; | |
5090 | sec = (asection *) 0; | |
5091 | h = (struct elf_link_hash_entry *) 0; | |
5092 | sym_name = (const char *) 0; | |
5093 | unresolved_reloc = false; | |
ef60b7ff | 5094 | warned = false; |
65f38f15 | 5095 | |
5bd4f169 AM |
5096 | if (r_type == R_PPC64_TOC) |
5097 | { | |
5098 | /* Relocation value is TOC base. Symbol is ignored. */ | |
5099 | relocation = TOCstart + TOC_BASE_OFF; | |
5100 | } | |
5101 | else if (r_symndx < symtab_hdr->sh_info) | |
5102 | { | |
5103 | /* It's a local symbol. */ | |
5104 | sym = local_syms + r_symndx; | |
5105 | sec = local_sections[r_symndx]; | |
5106 | sym_name = "<local symbol>"; | |
5107 | ||
f8df10f4 | 5108 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
f46c2da6 AM |
5109 | /* rel may have changed, update our copy of addend. */ |
5110 | addend = rel->r_addend; | |
5bd4f169 AM |
5111 | } |
5112 | else | |
5113 | { | |
5114 | /* It's a global symbol. */ | |
5115 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
5116 | while (h->root.type == bfd_link_hash_indirect | |
5117 | || h->root.type == bfd_link_hash_warning) | |
5118 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5119 | sym_name = h->root.root.string; | |
65f38f15 | 5120 | relocation = 0; |
5bd4f169 AM |
5121 | if (h->root.type == bfd_link_hash_defined |
5122 | || h->root.type == bfd_link_hash_defweak) | |
5123 | { | |
5124 | sec = h->root.u.def.section; | |
65f38f15 AM |
5125 | if (sec->output_section == NULL) |
5126 | /* Set a flag that will be cleared later if we find a | |
5127 | relocation value for this symbol. output_section | |
5128 | is typically NULL for symbols satisfied by a shared | |
5129 | library. */ | |
5130 | unresolved_reloc = true; | |
5bd4f169 AM |
5131 | else |
5132 | relocation = (h->root.u.def.value | |
5133 | + sec->output_section->vma | |
5134 | + sec->output_offset); | |
5135 | } | |
5136 | else if (h->root.type == bfd_link_hash_undefweak) | |
65f38f15 | 5137 | ; |
671bae9c | 5138 | else if (info->shared |
65f38f15 AM |
5139 | && (!info->symbolic || info->allow_shlib_undefined) |
5140 | && !info->no_undefined | |
5141 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
5142 | ; | |
5bd4f169 AM |
5143 | else |
5144 | { | |
5145 | if (! ((*info->callbacks->undefined_symbol) | |
5146 | (info, h->root.root.string, input_bfd, input_section, | |
65f38f15 AM |
5147 | offset, (!info->shared |
5148 | || info->no_undefined | |
5149 | || ELF_ST_VISIBILITY (h->other))))) | |
5bd4f169 | 5150 | return false; |
ef60b7ff | 5151 | warned = true; |
5bd4f169 AM |
5152 | } |
5153 | } | |
5154 | ||
65f38f15 | 5155 | /* First handle relocations that tweak non-addend part of insn. */ |
86c76c7b | 5156 | insn = 0; |
65f38f15 | 5157 | switch (r_type) |
5bd4f169 AM |
5158 | { |
5159 | default: | |
65f38f15 | 5160 | break; |
5bd4f169 | 5161 | |
65f38f15 AM |
5162 | /* Branch taken prediction relocations. */ |
5163 | case R_PPC64_ADDR14_BRTAKEN: | |
5164 | case R_PPC64_REL14_BRTAKEN: | |
96e0dda4 | 5165 | insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
86c76c7b | 5166 | /* Fall thru. */ |
65f38f15 | 5167 | |
86c76c7b | 5168 | /* Branch not taken prediction relocations. */ |
65f38f15 AM |
5169 | case R_PPC64_ADDR14_BRNTAKEN: |
5170 | case R_PPC64_REL14_BRNTAKEN: | |
86c76c7b | 5171 | insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21); |
96e0dda4 AM |
5172 | if (is_power4) |
5173 | { | |
5174 | /* Set 'a' bit. This is 0b00010 in BO field for branch | |
5175 | on CR(BI) insns (BO == 001at or 011at), and 0b01000 | |
5176 | for branch on CTR insns (BO == 1a00t or 1a01t). */ | |
5177 | if ((insn & (0x14 << 21)) == (0x04 << 21)) | |
5178 | insn |= 0x02 << 21; | |
5179 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) | |
5180 | insn |= 0x08 << 21; | |
5181 | else | |
5182 | break; | |
5183 | } | |
65f38f15 | 5184 | else |
96e0dda4 | 5185 | { |
805fc799 AM |
5186 | from = (offset |
5187 | + input_section->output_offset | |
5188 | + input_section->output_section->vma); | |
5189 | ||
96e0dda4 | 5190 | /* Invert 'y' bit if not the default. */ |
805fc799 | 5191 | if ((bfd_signed_vma) (relocation + addend - from) < 0) |
96e0dda4 AM |
5192 | insn ^= 0x01 << 21; |
5193 | } | |
86c76c7b | 5194 | |
65f38f15 AM |
5195 | bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset); |
5196 | break; | |
5bd4f169 | 5197 | |
65f38f15 | 5198 | case R_PPC64_REL24: |
721956f4 AM |
5199 | /* A REL24 branching to a linkage function is followed by a |
5200 | nop. We replace the nop with a ld in order to restore | |
5201 | the TOC base pointer. Only calls to shared objects need | |
5202 | to alter the TOC base. These are recognized by their | |
5203 | need for a PLT entry. */ | |
5bd4f169 | 5204 | if (h != NULL |
721956f4 AM |
5205 | && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL |
5206 | && fdh->plt.offset != (bfd_vma) -1 | |
5207 | && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh, | |
5208 | rel, htab)) != NULL) | |
41bd81ab | 5209 | { |
721956f4 AM |
5210 | boolean can_plt_call = 0; |
5211 | ||
41bd81ab AM |
5212 | if (offset + 8 <= input_section->_cooked_size) |
5213 | { | |
721956f4 AM |
5214 | insn = bfd_get_32 (input_bfd, contents + offset + 4); |
5215 | if (insn == NOP | |
5216 | || insn == CROR_151515 || insn == CROR_313131) | |
41bd81ab | 5217 | { |
721956f4 AM |
5218 | bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1, |
5219 | contents + offset + 4); | |
5220 | can_plt_call = 1; | |
41bd81ab | 5221 | } |
5bd4f169 | 5222 | } |
721956f4 AM |
5223 | |
5224 | if (!can_plt_call) | |
5225 | { | |
5226 | /* If this is a plain branch rather than a branch | |
5227 | and link, don't require a nop. */ | |
5228 | insn = bfd_get_32 (input_bfd, contents + offset); | |
5229 | if ((insn & 1) == 0) | |
5230 | can_plt_call = 1; | |
5231 | } | |
5232 | ||
5233 | if (can_plt_call) | |
5234 | { | |
5235 | relocation = (stub_entry->stub_offset | |
5236 | + stub_entry->stub_sec->output_offset | |
5237 | + stub_entry->stub_sec->output_section->vma); | |
5238 | addend = 0; | |
5239 | unresolved_reloc = false; | |
5240 | } | |
5bd4f169 | 5241 | } |
e86ce104 AM |
5242 | |
5243 | if (h != NULL | |
5244 | && h->root.type == bfd_link_hash_undefweak | |
721956f4 AM |
5245 | && relocation == 0 |
5246 | && addend == 0) | |
e86ce104 | 5247 | { |
721956f4 AM |
5248 | /* Tweak calls to undefined weak functions to point at a |
5249 | blr. We can thus call a weak function without first | |
5250 | checking whether the function is defined. We have a | |
5251 | blr at the end of .sfpr. */ | |
805fc799 | 5252 | BFD_ASSERT (htab->sfpr->_raw_size != 0); |
721956f4 AM |
5253 | relocation = (htab->sfpr->_raw_size - 4 |
5254 | + htab->sfpr->output_offset | |
5255 | + htab->sfpr->output_section->vma); | |
5256 | from = (offset | |
5257 | + input_section->output_offset | |
5258 | + input_section->output_section->vma); | |
805fc799 | 5259 | |
721956f4 AM |
5260 | /* But let's not be silly about it. If the blr isn't in |
5261 | reach, just go to the next instruction. */ | |
805fc799 AM |
5262 | if (relocation - from + (1 << 25) >= (1 << 26) |
5263 | || htab->sfpr->_raw_size == 0) | |
721956f4 | 5264 | relocation = from + 4; |
e86ce104 | 5265 | } |
65f38f15 AM |
5266 | break; |
5267 | } | |
5bd4f169 | 5268 | |
65f38f15 AM |
5269 | /* Set `addend'. */ |
5270 | switch (r_type) | |
5271 | { | |
5272 | default: | |
5273 | (*_bfd_error_handler) | |
5274 | (_("%s: unknown relocation type %d for symbol %s"), | |
5275 | bfd_archive_filename (input_bfd), (int) r_type, sym_name); | |
5bd4f169 | 5276 | |
65f38f15 AM |
5277 | bfd_set_error (bfd_error_bad_value); |
5278 | ret = false; | |
5279 | continue; | |
5bd4f169 | 5280 | |
65f38f15 AM |
5281 | case R_PPC64_NONE: |
5282 | case R_PPC_GNU_VTINHERIT: | |
5283 | case R_PPC_GNU_VTENTRY: | |
5284 | continue; | |
5bd4f169 AM |
5285 | |
5286 | /* GOT16 relocations. Like an ADDR16 using the symbol's | |
5287 | address in the GOT as relocation value instead of the | |
5288 | symbols value itself. Also, create a GOT entry for the | |
5289 | symbol and put the symbol value there. */ | |
65f38f15 AM |
5290 | case R_PPC64_GOT16: |
5291 | case R_PPC64_GOT16_LO: | |
5292 | case R_PPC64_GOT16_HI: | |
5293 | case R_PPC64_GOT16_HA: | |
5294 | case R_PPC64_GOT16_DS: | |
5295 | case R_PPC64_GOT16_LO_DS: | |
5bd4f169 AM |
5296 | { |
5297 | /* Relocation is to the entry for this symbol in the global | |
5298 | offset table. */ | |
5299 | bfd_vma off; | |
65f38f15 AM |
5300 | |
5301 | if (htab->sgot == NULL) | |
5302 | abort (); | |
5bd4f169 AM |
5303 | |
5304 | if (h != NULL) | |
5305 | { | |
65f38f15 | 5306 | boolean dyn; |
5bd4f169 | 5307 | |
65f38f15 AM |
5308 | off = h->got.offset; |
5309 | dyn = htab->elf.dynamic_sections_created; | |
5310 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) | |
5bd4f169 | 5311 | || (info->shared |
65f38f15 AM |
5312 | && (info->symbolic |
5313 | || h->dynindx == -1 | |
5314 | || (h->elf_link_hash_flags | |
5315 | & ELF_LINK_FORCED_LOCAL)) | |
5bd4f169 AM |
5316 | && (h->elf_link_hash_flags |
5317 | & ELF_LINK_HASH_DEF_REGULAR))) | |
5318 | { | |
5319 | /* This is actually a static link, or it is a | |
5320 | -Bsymbolic link and the symbol is defined | |
65f38f15 AM |
5321 | locally, or the symbol was forced to be local |
5322 | because of a version file. We must initialize | |
5323 | this entry in the global offset table. Since the | |
5324 | offset must always be a multiple of 8, we use the | |
5325 | least significant bit to record whether we have | |
5bd4f169 AM |
5326 | initialized it already. |
5327 | ||
65f38f15 | 5328 | When doing a dynamic link, we create a .rel.got |
5bd4f169 AM |
5329 | relocation entry to initialize the value. This |
5330 | is done in the finish_dynamic_symbol routine. */ | |
5331 | if ((off & 1) != 0) | |
5332 | off &= ~1; | |
5333 | else | |
5334 | { | |
5335 | bfd_put_64 (output_bfd, relocation, | |
65f38f15 | 5336 | htab->sgot->contents + off); |
5bd4f169 AM |
5337 | h->got.offset |= 1; |
5338 | } | |
5339 | } | |
65f38f15 AM |
5340 | else |
5341 | unresolved_reloc = false; | |
5bd4f169 AM |
5342 | } |
5343 | else | |
5344 | { | |
65f38f15 AM |
5345 | if (local_got_offsets == NULL) |
5346 | abort (); | |
5bd4f169 AM |
5347 | |
5348 | off = local_got_offsets[r_symndx]; | |
5349 | ||
65f38f15 | 5350 | /* The offset must always be a multiple of 8. We use |
5bd4f169 AM |
5351 | the least significant bit to record whether we have |
5352 | already processed this entry. */ | |
5353 | if ((off & 1) != 0) | |
5354 | off &= ~1; | |
5355 | else | |
5356 | { | |
65f38f15 AM |
5357 | bfd_put_64 (output_bfd, relocation, |
5358 | htab->sgot->contents + off); | |
5bd4f169 AM |
5359 | |
5360 | if (info->shared) | |
5361 | { | |
5bd4f169 | 5362 | Elf_Internal_Rela outrel; |
65f38f15 | 5363 | Elf64_External_Rela *loc; |
5bd4f169 AM |
5364 | |
5365 | /* We need to generate a R_PPC64_RELATIVE reloc | |
5366 | for the dynamic linker. */ | |
65f38f15 AM |
5367 | outrel.r_offset = (htab->sgot->output_section->vma |
5368 | + htab->sgot->output_offset | |
5bd4f169 AM |
5369 | + off); |
5370 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); | |
5371 | outrel.r_addend = relocation; | |
65f38f15 AM |
5372 | loc = (Elf64_External_Rela *) htab->srelgot->contents; |
5373 | loc += htab->srelgot->reloc_count++; | |
5374 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
5bd4f169 AM |
5375 | } |
5376 | ||
5377 | local_got_offsets[r_symndx] |= 1; | |
5378 | } | |
5379 | } | |
5380 | ||
65f38f15 AM |
5381 | if (off >= (bfd_vma) -2) |
5382 | abort (); | |
5383 | ||
5384 | relocation = htab->sgot->output_offset + off; | |
5385 | ||
5bd4f169 AM |
5386 | /* TOC base (r2) is TOC start plus 0x8000. */ |
5387 | addend -= TOC_BASE_OFF; | |
5bd4f169 | 5388 | } |
65f38f15 AM |
5389 | break; |
5390 | ||
5391 | case R_PPC64_PLT16_HA: | |
5392 | case R_PPC64_PLT16_HI: | |
5393 | case R_PPC64_PLT16_LO: | |
5394 | case R_PPC64_PLT32: | |
5395 | case R_PPC64_PLT64: | |
5396 | /* Relocation is to the entry for this symbol in the | |
5397 | procedure linkage table. */ | |
5398 | ||
5399 | /* Resolve a PLT reloc against a local symbol directly, | |
5400 | without using the procedure linkage table. */ | |
5401 | if (h == NULL) | |
5402 | break; | |
5403 | ||
5404 | if (h->plt.offset == (bfd_vma) -1 | |
5405 | || htab->splt == NULL) | |
5406 | { | |
5407 | /* We didn't make a PLT entry for this symbol. This | |
5408 | happens when statically linking PIC code, or when | |
5409 | using -Bsymbolic. */ | |
5410 | break; | |
5411 | } | |
5412 | ||
5413 | relocation = (htab->splt->output_section->vma | |
5414 | + htab->splt->output_offset | |
5415 | + h->plt.offset); | |
5416 | unresolved_reloc = false; | |
5417 | break; | |
5bd4f169 AM |
5418 | |
5419 | /* TOC16 relocs. We want the offset relative to the TOC base, | |
5420 | which is the address of the start of the TOC plus 0x8000. | |
5421 | The TOC consists of sections .got, .toc, .tocbss, and .plt, | |
5422 | in this order. */ | |
65f38f15 AM |
5423 | case R_PPC64_TOC16: |
5424 | case R_PPC64_TOC16_LO: | |
5425 | case R_PPC64_TOC16_HI: | |
5426 | case R_PPC64_TOC16_DS: | |
5427 | case R_PPC64_TOC16_LO_DS: | |
5428 | case R_PPC64_TOC16_HA: | |
5bd4f169 | 5429 | addend -= TOCstart + TOC_BASE_OFF; |
5bd4f169 AM |
5430 | break; |
5431 | ||
5432 | /* Relocate against the beginning of the section. */ | |
65f38f15 AM |
5433 | case R_PPC64_SECTOFF: |
5434 | case R_PPC64_SECTOFF_LO: | |
5435 | case R_PPC64_SECTOFF_HI: | |
5436 | case R_PPC64_SECTOFF_DS: | |
5437 | case R_PPC64_SECTOFF_LO_DS: | |
5438 | case R_PPC64_SECTOFF_HA: | |
5439 | if (sec != (asection *) 0) | |
5440 | addend -= sec->output_section->vma; | |
5bd4f169 AM |
5441 | break; |
5442 | ||
721956f4 AM |
5443 | case R_PPC64_REL14: |
5444 | case R_PPC64_REL14_BRNTAKEN: | |
5445 | case R_PPC64_REL14_BRTAKEN: | |
5d1634d7 AM |
5446 | case R_PPC64_REL24: |
5447 | break; | |
5448 | ||
65f38f15 AM |
5449 | /* Relocations that may need to be propagated if this is a |
5450 | dynamic object. */ | |
65f38f15 AM |
5451 | case R_PPC64_REL32: |
5452 | case R_PPC64_REL64: | |
5453 | case R_PPC64_ADDR14: | |
5454 | case R_PPC64_ADDR14_BRNTAKEN: | |
5455 | case R_PPC64_ADDR14_BRTAKEN: | |
5456 | case R_PPC64_ADDR16: | |
5457 | case R_PPC64_ADDR16_DS: | |
5458 | case R_PPC64_ADDR16_HA: | |
5459 | case R_PPC64_ADDR16_HI: | |
5460 | case R_PPC64_ADDR16_HIGHER: | |
5461 | case R_PPC64_ADDR16_HIGHERA: | |
5462 | case R_PPC64_ADDR16_HIGHEST: | |
5463 | case R_PPC64_ADDR16_HIGHESTA: | |
5464 | case R_PPC64_ADDR16_LO: | |
5465 | case R_PPC64_ADDR16_LO_DS: | |
5466 | case R_PPC64_ADDR24: | |
5467 | case R_PPC64_ADDR30: | |
5468 | case R_PPC64_ADDR32: | |
5469 | case R_PPC64_ADDR64: | |
5470 | case R_PPC64_UADDR16: | |
5471 | case R_PPC64_UADDR32: | |
5472 | case R_PPC64_UADDR64: | |
ec338859 AM |
5473 | /* r_symndx will be zero only for relocs against symbols |
5474 | from removed linkonce sections, or sections discarded by | |
5475 | a linker script. */ | |
5d1634d7 AM |
5476 | if (r_symndx == 0) |
5477 | break; | |
5478 | /* Fall thru. */ | |
5479 | ||
5480 | case R_PPC64_TOC: | |
5481 | if ((input_section->flags & SEC_ALLOC) == 0) | |
ec338859 AM |
5482 | break; |
5483 | ||
41bd81ab AM |
5484 | if (NO_OPD_RELOCS && is_opd) |
5485 | break; | |
5486 | ||
65f38f15 | 5487 | if ((info->shared |
65f38f15 AM |
5488 | && (IS_ABSOLUTE_RELOC (r_type) |
5489 | || (h != NULL | |
5490 | && h->dynindx != -1 | |
5491 | && (! info->symbolic | |
5492 | || (h->elf_link_hash_flags | |
5493 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
5494 | || (!info->shared | |
65f38f15 AM |
5495 | && h != NULL |
5496 | && h->dynindx != -1 | |
5497 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
5498 | && (((h->elf_link_hash_flags | |
5499 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
5500 | && (h->elf_link_hash_flags | |
5501 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
5502 | || h->root.type == bfd_link_hash_undefweak | |
5503 | || h->root.type == bfd_link_hash_undefined))) | |
5504 | { | |
5505 | Elf_Internal_Rela outrel; | |
5506 | boolean skip, relocate; | |
5507 | asection *sreloc; | |
5508 | Elf64_External_Rela *loc; | |
5509 | ||
5510 | /* When generating a dynamic object, these relocations | |
5511 | are copied into the output file to be resolved at run | |
5512 | time. */ | |
5513 | ||
5514 | skip = false; | |
0bb2d96a | 5515 | relocate = false; |
65f38f15 | 5516 | |
c629eae0 JJ |
5517 | outrel.r_offset = |
5518 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
5519 | rel->r_offset); | |
5520 | if (outrel.r_offset == (bfd_vma) -1) | |
5521 | skip = true; | |
0bb2d96a JJ |
5522 | else if (outrel.r_offset == (bfd_vma) -2) |
5523 | skip = true, relocate = true; | |
65f38f15 AM |
5524 | outrel.r_offset += (input_section->output_section->vma |
5525 | + input_section->output_offset); | |
5526 | outrel.r_addend = addend; | |
5527 | ||
5528 | if (skip) | |
0bb2d96a | 5529 | memset (&outrel, 0, sizeof outrel); |
65f38f15 AM |
5530 | else if (h != NULL |
5531 | && h->dynindx != -1 | |
41bd81ab | 5532 | && !is_opd |
65f38f15 AM |
5533 | && (!IS_ABSOLUTE_RELOC (r_type) |
5534 | || !info->shared | |
5535 | || !info->symbolic | |
5536 | || (h->elf_link_hash_flags | |
5537 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
0bb2d96a | 5538 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
65f38f15 AM |
5539 | else |
5540 | { | |
41bd81ab AM |
5541 | /* This symbol is local, or marked to become local, |
5542 | or this is an opd section reloc which must point | |
5543 | at a local function. */ | |
65f38f15 AM |
5544 | outrel.r_addend += relocation; |
5545 | relocate = true; | |
e86ce104 | 5546 | if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
65f38f15 AM |
5547 | { |
5548 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); | |
5549 | } | |
5550 | else | |
5551 | { | |
5552 | long indx = 0; | |
5553 | ||
41bd81ab | 5554 | if (bfd_is_abs_section (sec)) |
65f38f15 AM |
5555 | ; |
5556 | else if (sec == NULL || sec->owner == NULL) | |
5557 | { | |
5558 | bfd_set_error (bfd_error_bad_value); | |
5559 | return false; | |
5560 | } | |
5561 | else | |
5562 | { | |
5563 | asection *osec; | |
5564 | ||
5565 | osec = sec->output_section; | |
5566 | indx = elf_section_data (osec)->dynindx; | |
5567 | ||
5568 | /* We are turning this relocation into one | |
5569 | against a section symbol, so subtract out | |
5570 | the output section's address but not the | |
5571 | offset of the input section in the output | |
5572 | section. */ | |
5573 | outrel.r_addend -= osec->vma; | |
5574 | } | |
5575 | ||
5576 | outrel.r_info = ELF64_R_INFO (indx, r_type); | |
5577 | } | |
5578 | } | |
5579 | ||
5580 | sreloc = elf_section_data (input_section)->sreloc; | |
5581 | if (sreloc == NULL) | |
5582 | abort (); | |
5583 | ||
5584 | loc = (Elf64_External_Rela *) sreloc->contents; | |
5585 | loc += sreloc->reloc_count++; | |
5586 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
5587 | ||
5588 | /* If this reloc is against an external symbol, it will | |
5589 | be computed at runtime, so there's no need to do | |
5590 | anything now. */ | |
5591 | if (! relocate) | |
5592 | continue; | |
5593 | } | |
5bd4f169 AM |
5594 | break; |
5595 | ||
65f38f15 AM |
5596 | case R_PPC64_COPY: |
5597 | case R_PPC64_GLOB_DAT: | |
5598 | case R_PPC64_JMP_SLOT: | |
5599 | case R_PPC64_RELATIVE: | |
5600 | /* We shouldn't ever see these dynamic relocs in relocatable | |
5601 | files. */ | |
5602 | /* Fall thru */ | |
5603 | ||
5604 | case R_PPC64_PLTGOT16: | |
5605 | case R_PPC64_PLTGOT16_DS: | |
5606 | case R_PPC64_PLTGOT16_HA: | |
5607 | case R_PPC64_PLTGOT16_HI: | |
5608 | case R_PPC64_PLTGOT16_LO: | |
5609 | case R_PPC64_PLTGOT16_LO_DS: | |
5610 | case R_PPC64_PLTREL32: | |
5611 | case R_PPC64_PLTREL64: | |
5612 | /* These ones haven't been implemented yet. */ | |
5613 | ||
5614 | (*_bfd_error_handler) | |
5615 | (_("%s: Relocation %s is not supported for symbol %s."), | |
5616 | bfd_archive_filename (input_bfd), | |
5617 | ppc64_elf_howto_table[(int) r_type]->name, sym_name); | |
5bd4f169 AM |
5618 | |
5619 | bfd_set_error (bfd_error_invalid_operation); | |
5620 | ret = false; | |
5621 | continue; | |
65f38f15 | 5622 | } |
5bd4f169 | 5623 | |
65f38f15 AM |
5624 | /* Do any further special processing. */ |
5625 | switch (r_type) | |
5626 | { | |
5627 | default: | |
5628 | break; | |
5629 | ||
5630 | case R_PPC64_ADDR16_HA: | |
5631 | case R_PPC64_ADDR16_HIGHERA: | |
5632 | case R_PPC64_ADDR16_HIGHESTA: | |
5633 | case R_PPC64_PLT16_HA: | |
5634 | case R_PPC64_TOC16_HA: | |
5635 | case R_PPC64_SECTOFF_HA: | |
5636 | /* It's just possible that this symbol is a weak symbol | |
5637 | that's not actually defined anywhere. In that case, | |
5638 | 'sec' would be NULL, and we should leave the symbol | |
5639 | alone (it will be set to zero elsewhere in the link). */ | |
5640 | if (sec != NULL) | |
5641 | /* Add 0x10000 if sign bit in 0:15 is set. */ | |
5642 | addend += ((relocation + addend) & 0x8000) << 1; | |
5643 | break; | |
5644 | ||
5645 | case R_PPC64_ADDR16_DS: | |
5646 | case R_PPC64_ADDR16_LO_DS: | |
5647 | case R_PPC64_GOT16_DS: | |
5648 | case R_PPC64_GOT16_LO_DS: | |
5649 | case R_PPC64_PLT16_LO_DS: | |
5650 | case R_PPC64_SECTOFF_DS: | |
5651 | case R_PPC64_SECTOFF_LO_DS: | |
5652 | case R_PPC64_TOC16_DS: | |
5653 | case R_PPC64_TOC16_LO_DS: | |
5654 | case R_PPC64_PLTGOT16_DS: | |
5655 | case R_PPC64_PLTGOT16_LO_DS: | |
5656 | if (((relocation + addend) & 3) != 0) | |
5657 | { | |
5658 | (*_bfd_error_handler) | |
5659 | (_("%s: error: relocation %s not a multiple of 4"), | |
5660 | bfd_archive_filename (input_bfd), | |
5661 | ppc64_elf_howto_table[(int) r_type]->name); | |
5662 | bfd_set_error (bfd_error_bad_value); | |
5663 | ret = false; | |
5664 | continue; | |
5665 | } | |
5666 | break; | |
721956f4 AM |
5667 | |
5668 | case R_PPC64_REL14: | |
5669 | case R_PPC64_REL14_BRNTAKEN: | |
5670 | case R_PPC64_REL14_BRTAKEN: | |
5671 | max_br_offset = 1 << 15; | |
5672 | goto branch_check; | |
5673 | ||
5674 | case R_PPC64_REL24: | |
5675 | max_br_offset = 1 << 25; | |
5676 | ||
5677 | branch_check: | |
5678 | /* If the branch is out of reach, then redirect the | |
5679 | call to the local stub for this function. */ | |
5680 | from = (offset | |
5681 | + input_section->output_offset | |
5682 | + input_section->output_section->vma); | |
5683 | if (relocation + addend - from + max_br_offset >= 2 * max_br_offset | |
5684 | && (stub_entry = ppc_get_stub_entry (input_section, sec, h, | |
5685 | rel, htab)) != NULL) | |
5686 | { | |
5687 | /* Munge up the value and addend so that we call the stub | |
5688 | rather than the procedure directly. */ | |
5689 | relocation = (stub_entry->stub_offset | |
5690 | + stub_entry->stub_sec->output_offset | |
5691 | + stub_entry->stub_sec->output_section->vma); | |
5692 | addend = 0; | |
5693 | } | |
5694 | break; | |
5bd4f169 AM |
5695 | } |
5696 | ||
65f38f15 AM |
5697 | /* FIXME: Why do we allow debugging sections to escape this error? |
5698 | More importantly, why do we not emit dynamic relocs above in | |
5699 | debugging sections (which are ! SEC_ALLOC)? If we had | |
5700 | emitted the dynamic reloc, we could remove the fudge here. */ | |
5701 | if (unresolved_reloc | |
5702 | && !(info->shared | |
5703 | && (input_section->flags & SEC_DEBUGGING) != 0 | |
5704 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
5705 | (*_bfd_error_handler) | |
5706 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
5707 | bfd_archive_filename (input_bfd), | |
5708 | bfd_get_section_name (input_bfd, input_section), | |
5709 | (long) rel->r_offset, | |
5710 | h->root.root.string); | |
5bd4f169 | 5711 | |
65f38f15 | 5712 | r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type], |
5bd4f169 AM |
5713 | input_bfd, |
5714 | input_section, | |
5715 | contents, | |
5716 | offset, | |
5717 | relocation, | |
5718 | addend); | |
5719 | ||
ef60b7ff | 5720 | if (r != bfd_reloc_ok) |
5bd4f169 AM |
5721 | { |
5722 | const char *name; | |
5723 | ||
5724 | if (h != NULL) | |
5725 | { | |
5726 | if (h->root.type == bfd_link_hash_undefweak | |
65f38f15 | 5727 | && ppc64_elf_howto_table[(int) r_type]->pc_relative) |
5bd4f169 AM |
5728 | { |
5729 | /* Assume this is a call protected by other code that | |
5730 | detects the symbol is undefined. If this is the case, | |
5731 | we can safely ignore the overflow. If not, the | |
5732 | program is hosed anyway, and a little warning isn't | |
5733 | going to help. */ | |
5734 | ||
5735 | continue; | |
5736 | } | |
5737 | ||
5738 | name = h->root.root.string; | |
5739 | } | |
5740 | else | |
5741 | { | |
5742 | name = bfd_elf_string_from_elf_section (input_bfd, | |
5743 | symtab_hdr->sh_link, | |
5744 | sym->st_name); | |
5745 | if (name == NULL) | |
5746 | continue; | |
5747 | if (*name == '\0') | |
5748 | name = bfd_section_name (input_bfd, sec); | |
5749 | } | |
5750 | ||
ef60b7ff AM |
5751 | if (r == bfd_reloc_overflow) |
5752 | { | |
5753 | if (warned) | |
5754 | continue; | |
5755 | if (!((*info->callbacks->reloc_overflow) | |
5756 | (info, name, ppc64_elf_howto_table[(int) r_type]->name, | |
5757 | rel->r_addend, input_bfd, input_section, offset))) | |
5758 | return false; | |
5759 | } | |
5760 | else | |
5761 | { | |
5762 | (*_bfd_error_handler) | |
5763 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
5764 | bfd_archive_filename (input_bfd), | |
5765 | bfd_get_section_name (input_bfd, input_section), | |
5766 | (long) rel->r_offset, name, (int) r); | |
5767 | ret = false; | |
5768 | } | |
5bd4f169 | 5769 | } |
5bd4f169 AM |
5770 | } |
5771 | ||
5bd4f169 AM |
5772 | return ret; |
5773 | } | |
5774 | ||
5775 | /* Finish up dynamic symbol handling. We set the contents of various | |
5776 | dynamic sections here. */ | |
5777 | ||
5778 | static boolean | |
5779 | ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym) | |
5780 | bfd *output_bfd; | |
5781 | struct bfd_link_info *info; | |
5782 | struct elf_link_hash_entry *h; | |
5783 | Elf_Internal_Sym *sym; | |
5784 | { | |
65f38f15 | 5785 | struct ppc_link_hash_table *htab; |
5bd4f169 AM |
5786 | bfd *dynobj; |
5787 | ||
65f38f15 AM |
5788 | htab = ppc_hash_table (info); |
5789 | dynobj = htab->elf.dynobj; | |
5bd4f169 | 5790 | |
41bd81ab AM |
5791 | if (h->plt.offset != (bfd_vma) -1 |
5792 | && ((struct ppc_link_hash_entry *) h)->is_func_descriptor) | |
5bd4f169 | 5793 | { |
65f38f15 AM |
5794 | Elf_Internal_Rela rela; |
5795 | Elf64_External_Rela *loc; | |
5bd4f169 AM |
5796 | |
5797 | /* This symbol has an entry in the procedure linkage table. Set | |
5798 | it up. */ | |
5799 | ||
5d1634d7 | 5800 | if (htab->splt == NULL |
65f38f15 | 5801 | || htab->srelplt == NULL |
e86ce104 | 5802 | || htab->sglink == NULL) |
65f38f15 AM |
5803 | abort (); |
5804 | ||
65f38f15 AM |
5805 | /* Create a JMP_SLOT reloc to inform the dynamic linker to |
5806 | fill in the PLT entry. */ | |
5bd4f169 | 5807 | |
65f38f15 AM |
5808 | rela.r_offset = (htab->splt->output_section->vma |
5809 | + htab->splt->output_offset | |
5810 | + h->plt.offset); | |
e86ce104 | 5811 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); |
65f38f15 AM |
5812 | rela.r_addend = 0; |
5813 | ||
5814 | loc = (Elf64_External_Rela *) htab->srelplt->contents; | |
5815 | loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE; | |
5816 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
5bd4f169 AM |
5817 | } |
5818 | ||
5819 | if (h->got.offset != (bfd_vma) -1) | |
5820 | { | |
5bd4f169 | 5821 | Elf_Internal_Rela rela; |
65f38f15 | 5822 | Elf64_External_Rela *loc; |
5bd4f169 AM |
5823 | |
5824 | /* This symbol has an entry in the global offset table. Set it | |
5825 | up. */ | |
5826 | ||
65f38f15 AM |
5827 | if (htab->sgot == NULL || htab->srelgot == NULL) |
5828 | abort (); | |
5bd4f169 | 5829 | |
65f38f15 AM |
5830 | rela.r_offset = (htab->sgot->output_section->vma |
5831 | + htab->sgot->output_offset | |
dc810e39 | 5832 | + (h->got.offset &~ (bfd_vma) 1)); |
5bd4f169 | 5833 | |
65f38f15 AM |
5834 | /* If this is a static link, or it is a -Bsymbolic link and the |
5835 | symbol is defined locally or was forced to be local because | |
5836 | of a version file, we just want to emit a RELATIVE reloc. | |
5837 | The entry in the global offset table will already have been | |
5838 | initialized in the relocate_section function. */ | |
5bd4f169 | 5839 | if (info->shared |
65f38f15 AM |
5840 | && (info->symbolic |
5841 | || h->dynindx == -1 | |
5842 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
5bd4f169 AM |
5843 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
5844 | { | |
65f38f15 | 5845 | BFD_ASSERT((h->got.offset & 1) != 0); |
5bd4f169 AM |
5846 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
5847 | rela.r_addend = (h->root.u.def.value | |
5848 | + h->root.u.def.section->output_section->vma | |
5849 | + h->root.u.def.section->output_offset); | |
5850 | } | |
5851 | else | |
5852 | { | |
5853 | BFD_ASSERT ((h->got.offset & 1) == 0); | |
65f38f15 AM |
5854 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
5855 | htab->sgot->contents + h->got.offset); | |
5bd4f169 AM |
5856 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT); |
5857 | rela.r_addend = 0; | |
5858 | } | |
5859 | ||
65f38f15 AM |
5860 | loc = (Elf64_External_Rela *) htab->srelgot->contents; |
5861 | loc += htab->srelgot->reloc_count++; | |
5862 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
5bd4f169 AM |
5863 | } |
5864 | ||
5865 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
5866 | { | |
5bd4f169 | 5867 | Elf_Internal_Rela rela; |
65f38f15 | 5868 | Elf64_External_Rela *loc; |
5bd4f169 | 5869 | |
65f38f15 | 5870 | /* This symbol needs a copy reloc. Set it up. */ |
5bd4f169 | 5871 | |
65f38f15 AM |
5872 | if (h->dynindx == -1 |
5873 | || (h->root.type != bfd_link_hash_defined | |
5874 | && h->root.type != bfd_link_hash_defweak) | |
5875 | || htab->srelbss == NULL) | |
5876 | abort (); | |
5bd4f169 AM |
5877 | |
5878 | rela.r_offset = (h->root.u.def.value | |
5879 | + h->root.u.def.section->output_section->vma | |
5880 | + h->root.u.def.section->output_offset); | |
5881 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); | |
5882 | rela.r_addend = 0; | |
65f38f15 AM |
5883 | loc = (Elf64_External_Rela *) htab->srelbss->contents; |
5884 | loc += htab->srelbss->reloc_count++; | |
5885 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
5bd4f169 AM |
5886 | } |
5887 | ||
5bd4f169 AM |
5888 | /* Mark some specially defined symbols as absolute. */ |
5889 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0) | |
5890 | sym->st_shndx = SHN_ABS; | |
5891 | ||
5892 | return true; | |
5893 | } | |
5894 | ||
65f38f15 AM |
5895 | /* Used to decide how to sort relocs in an optimal manner for the |
5896 | dynamic linker, before writing them out. */ | |
5897 | ||
5898 | static enum elf_reloc_type_class | |
5899 | ppc64_elf_reloc_type_class (rela) | |
5900 | const Elf_Internal_Rela *rela; | |
5901 | { | |
a33d1f77 AM |
5902 | enum elf_ppc_reloc_type r_type; |
5903 | ||
5904 | r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info); | |
5905 | switch (r_type) | |
65f38f15 AM |
5906 | { |
5907 | case R_PPC64_RELATIVE: | |
5908 | return reloc_class_relative; | |
5909 | case R_PPC64_JMP_SLOT: | |
5910 | return reloc_class_plt; | |
5911 | case R_PPC64_COPY: | |
5912 | return reloc_class_copy; | |
5913 | default: | |
5914 | return reloc_class_normal; | |
5915 | } | |
5916 | } | |
5917 | ||
5bd4f169 AM |
5918 | /* Finish up the dynamic sections. */ |
5919 | ||
5920 | static boolean | |
5921 | ppc64_elf_finish_dynamic_sections (output_bfd, info) | |
5922 | bfd *output_bfd; | |
5923 | struct bfd_link_info *info; | |
5924 | { | |
65f38f15 AM |
5925 | struct ppc_link_hash_table *htab; |
5926 | bfd *dynobj; | |
5bd4f169 | 5927 | asection *sdyn; |
5bd4f169 | 5928 | |
65f38f15 AM |
5929 | htab = ppc_hash_table (info); |
5930 | dynobj = htab->elf.dynobj; | |
5bd4f169 AM |
5931 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
5932 | ||
65f38f15 | 5933 | if (htab->elf.dynamic_sections_created) |
5bd4f169 | 5934 | { |
5bd4f169 AM |
5935 | Elf64_External_Dyn *dyncon, *dynconend; |
5936 | ||
65f38f15 AM |
5937 | if (sdyn == NULL || htab->sgot == NULL) |
5938 | abort (); | |
5bd4f169 AM |
5939 | |
5940 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
5941 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
5942 | for (; dyncon < dynconend; dyncon++) | |
5943 | { | |
5944 | Elf_Internal_Dyn dyn; | |
19397422 | 5945 | asection *s; |
5bd4f169 AM |
5946 | |
5947 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
5948 | ||
5949 | switch (dyn.d_tag) | |
5950 | { | |
65f38f15 AM |
5951 | default: |
5952 | continue; | |
5bd4f169 | 5953 | |
5d1634d7 AM |
5954 | case DT_PPC64_GLINK: |
5955 | dyn.d_un.d_ptr = (htab->sglink->output_section->vma | |
5956 | + htab->sglink->output_offset); | |
5957 | break; | |
5958 | ||
19397422 AM |
5959 | case DT_PPC64_OPD: |
5960 | s = bfd_get_section_by_name (output_bfd, ".opd"); | |
5961 | if (s != NULL) | |
5962 | dyn.d_un.d_ptr = s->vma; | |
5963 | break; | |
5964 | ||
5965 | case DT_PPC64_OPDSZ: | |
5966 | s = bfd_get_section_by_name (output_bfd, ".opd"); | |
5967 | if (s != NULL) | |
5968 | dyn.d_un.d_val = s->_raw_size; | |
5969 | break; | |
5970 | ||
65f38f15 | 5971 | case DT_PLTGOT: |
5d1634d7 AM |
5972 | dyn.d_un.d_ptr = (htab->splt->output_section->vma |
5973 | + htab->splt->output_offset); | |
65f38f15 AM |
5974 | break; |
5975 | ||
5976 | case DT_JMPREL: | |
5d1634d7 AM |
5977 | dyn.d_un.d_ptr = (htab->srelplt->output_section->vma |
5978 | + htab->srelplt->output_offset); | |
65f38f15 | 5979 | break; |
5bd4f169 | 5980 | |
65f38f15 | 5981 | case DT_PLTRELSZ: |
5d1634d7 AM |
5982 | dyn.d_un.d_val = htab->srelplt->_raw_size; |
5983 | break; | |
5984 | ||
5985 | case DT_RELASZ: | |
5986 | /* Don't count procedure linkage table relocs in the | |
5987 | overall reloc count. */ | |
5988 | if (htab->srelplt != NULL) | |
5989 | dyn.d_un.d_val -= htab->srelplt->_raw_size; | |
65f38f15 | 5990 | break; |
5bd4f169 | 5991 | } |
5bd4f169 | 5992 | |
65f38f15 | 5993 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
5bd4f169 | 5994 | } |
5bd4f169 AM |
5995 | } |
5996 | ||
5d1634d7 AM |
5997 | if (htab->sgot != NULL && htab->sgot->_raw_size != 0) |
5998 | { | |
5999 | /* Fill in the first entry in the global offset table. | |
6000 | We use it to hold the link-time TOCbase. */ | |
6001 | bfd_put_64 (output_bfd, | |
60ee0d4a | 6002 | elf_gp (output_bfd) + TOC_BASE_OFF, |
5d1634d7 AM |
6003 | htab->sgot->contents); |
6004 | ||
6005 | /* Set .got entry size. */ | |
6006 | elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8; | |
6007 | } | |
6008 | ||
6009 | if (htab->splt != NULL && htab->splt->_raw_size != 0) | |
6010 | { | |
6011 | /* Set .plt entry size. */ | |
6012 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize | |
6013 | = PLT_ENTRY_SIZE; | |
6014 | } | |
6015 | ||
5bd4f169 AM |
6016 | return true; |
6017 | } | |
6018 | ||
6019 | #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec | |
6020 | #define TARGET_LITTLE_NAME "elf64-powerpcle" | |
6021 | #define TARGET_BIG_SYM bfd_elf64_powerpc_vec | |
6022 | #define TARGET_BIG_NAME "elf64-powerpc" | |
6023 | #define ELF_ARCH bfd_arch_powerpc | |
6024 | #define ELF_MACHINE_CODE EM_PPC64 | |
6025 | #define ELF_MAXPAGESIZE 0x10000 | |
6026 | #define elf_info_to_howto ppc64_elf_info_to_howto | |
6027 | ||
6028 | #ifdef EM_CYGNUS_POWERPC | |
6029 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC | |
6030 | #endif | |
6031 | ||
6032 | #ifdef EM_PPC_OLD | |
6033 | #define ELF_MACHINE_ALT2 EM_PPC_OLD | |
6034 | #endif | |
6035 | ||
6036 | #define elf_backend_want_got_sym 0 | |
6037 | #define elf_backend_want_plt_sym 0 | |
6038 | #define elf_backend_plt_alignment 3 | |
6039 | #define elf_backend_plt_not_loaded 1 | |
6040 | #define elf_backend_got_symbol_offset 0 | |
5d1634d7 AM |
6041 | #define elf_backend_got_header_size 8 |
6042 | #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE | |
5bd4f169 | 6043 | #define elf_backend_can_gc_sections 1 |
65f38f15 | 6044 | #define elf_backend_can_refcount 1 |
b491616a | 6045 | #define elf_backend_rela_normal 1 |
5bd4f169 | 6046 | |
65f38f15 AM |
6047 | #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup |
6048 | #define bfd_elf64_bfd_set_private_flags ppc64_elf_set_private_flags | |
65f38f15 AM |
6049 | #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data |
6050 | #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create | |
721956f4 | 6051 | #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free |
65f38f15 AM |
6052 | |
6053 | #define elf_backend_section_from_shdr ppc64_elf_section_from_shdr | |
6054 | #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections | |
6055 | #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol | |
6056 | #define elf_backend_check_relocs ppc64_elf_check_relocs | |
6057 | #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook | |
6058 | #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook | |
6059 | #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol | |
e86ce104 AM |
6060 | #define elf_backend_hide_symbol ppc64_elf_hide_symbol |
6061 | #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust | |
65f38f15 AM |
6062 | #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections |
6063 | #define elf_backend_fake_sections ppc64_elf_fake_sections | |
6064 | #define elf_backend_relocate_section ppc64_elf_relocate_section | |
6065 | #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol | |
6066 | #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class | |
6067 | #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections | |
5bd4f169 AM |
6068 | |
6069 | #include "elf64-target.h" |