1 /* CRIS-specific support for 32-bit ELF.
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
3 Contributed by Axis Communications AB.
4 Written by Hans-Peter Nilsson, based on elf32-fr30.c
5 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
32 cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *,
33 asection *, bfd *, char **);
35 cris_elf_set_mach_from_flags (bfd *, unsigned long);
37 /* Forward declarations. */
38 static reloc_howto_type cris_elf_howto_table [] =
40 /* This reloc does nothing. */
41 HOWTO (R_CRIS_NONE, /* type */
43 3, /* size (0 = byte, 1 = short, 2 = long) */
45 FALSE, /* pc_relative */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_CRIS_NONE", /* name */
50 FALSE, /* partial_inplace */
53 FALSE), /* pcrel_offset */
55 /* An 8 bit absolute relocation. */
56 HOWTO (R_CRIS_8, /* type */
58 0, /* size (0 = byte, 1 = short, 2 = long) */
60 FALSE, /* pc_relative */
62 complain_overflow_bitfield, /* complain_on_overflow */
63 bfd_elf_generic_reloc, /* special_function */
64 "R_CRIS_8", /* name */
65 FALSE, /* partial_inplace */
66 0x0000, /* src_mask */
67 0x00ff, /* dst_mask */
68 FALSE), /* pcrel_offset */
70 /* A 16 bit absolute relocation. */
71 HOWTO (R_CRIS_16, /* type */
73 1, /* size (0 = byte, 1 = short, 2 = long) */
75 FALSE, /* pc_relative */
77 complain_overflow_bitfield, /* complain_on_overflow */
78 bfd_elf_generic_reloc, /* special_function */
79 "R_CRIS_16", /* name */
80 FALSE, /* partial_inplace */
81 0x00000000, /* src_mask */
82 0x0000ffff, /* dst_mask */
83 FALSE), /* pcrel_offset */
85 /* A 32 bit absolute relocation. */
86 HOWTO (R_CRIS_32, /* type */
88 2, /* size (0 = byte, 1 = short, 2 = long) */
90 FALSE, /* pc_relative */
92 /* We don't want overflow complaints for 64-bit vma builds
93 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
94 32-bit ELF) where sym=0xc0001234.
95 Don't do this for the PIC relocs, as we don't expect to
96 see them with large offsets. */
97 complain_overflow_dont, /* complain_on_overflow */
98 bfd_elf_generic_reloc, /* special_function */
99 "R_CRIS_32", /* name */
100 FALSE, /* partial_inplace */
101 0x00000000, /* src_mask */
102 0xffffffff, /* dst_mask */
103 FALSE), /* pcrel_offset */
105 /* An 8 bit PC-relative relocation. */
106 HOWTO (R_CRIS_8_PCREL, /* type */
108 0, /* size (0 = byte, 1 = short, 2 = long) */
110 TRUE, /* pc_relative */
112 complain_overflow_bitfield, /* complain_on_overflow */
113 cris_elf_pcrel_reloc, /* special_function */
114 "R_CRIS_8_PCREL", /* name */
115 FALSE, /* partial_inplace */
116 0x0000, /* src_mask */
117 0x00ff, /* dst_mask */
118 TRUE), /* pcrel_offset */
120 /* A 16 bit PC-relative relocation. */
121 HOWTO (R_CRIS_16_PCREL, /* type */
123 1, /* size (0 = byte, 1 = short, 2 = long) */
125 TRUE, /* pc_relative */
127 complain_overflow_bitfield, /* complain_on_overflow */
128 cris_elf_pcrel_reloc, /* special_function */
129 "R_CRIS_16_PCREL", /* name */
130 FALSE, /* partial_inplace */
131 0x00000000, /* src_mask */
132 0x0000ffff, /* dst_mask */
133 TRUE), /* pcrel_offset */
135 /* A 32 bit PC-relative relocation. */
136 HOWTO (R_CRIS_32_PCREL, /* type */
138 2, /* size (0 = byte, 1 = short, 2 = long) */
140 TRUE, /* pc_relative */
142 complain_overflow_bitfield, /* complain_on_overflow */
143 cris_elf_pcrel_reloc, /* special_function */
144 "R_CRIS_32_PCREL", /* name */
145 FALSE, /* partial_inplace */
146 0x00000000, /* src_mask */
147 0xffffffff, /* dst_mask */
148 TRUE), /* pcrel_offset */
150 /* GNU extension to record C++ vtable hierarchy. */
151 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
153 2, /* size (0 = byte, 1 = short, 2 = long) */
155 FALSE, /* pc_relative */
157 complain_overflow_dont, /* complain_on_overflow */
158 NULL, /* special_function */
159 "R_CRIS_GNU_VTINHERIT", /* name */
160 FALSE, /* partial_inplace */
163 FALSE), /* pcrel_offset */
165 /* GNU extension to record C++ vtable member usage. */
166 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
168 2, /* size (0 = byte, 1 = short, 2 = long) */
170 FALSE, /* pc_relative */
172 complain_overflow_dont, /* complain_on_overflow */
173 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
174 "R_CRIS_GNU_VTENTRY", /* name */
175 FALSE, /* partial_inplace */
178 FALSE), /* pcrel_offset */
180 /* This is used only by the dynamic linker. The symbol should exist
181 both in the object being run and in some shared library. The
182 dynamic linker copies the data addressed by the symbol from the
183 shared library into the object, because the object being
184 run has to have the data at some particular address. */
185 HOWTO (R_CRIS_COPY, /* type */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
189 FALSE, /* pc_relative */
191 complain_overflow_bitfield, /* complain_on_overflow */
192 bfd_elf_generic_reloc, /* special_function */
193 "R_CRIS_COPY", /* name */
194 FALSE, /* partial_inplace */
197 FALSE), /* pcrel_offset */
199 /* Like R_CRIS_32, but used when setting global offset table entries. */
200 HOWTO (R_CRIS_GLOB_DAT, /* type */
202 2, /* size (0 = byte, 1 = short, 2 = long) */
204 FALSE, /* pc_relative */
206 complain_overflow_bitfield, /* complain_on_overflow */
207 bfd_elf_generic_reloc, /* special_function */
208 "R_CRIS_GLOB_DAT", /* name */
209 FALSE, /* partial_inplace */
211 0xffffffff, /* dst_mask */
212 FALSE), /* pcrel_offset */
214 /* Marks a procedure linkage table entry for a symbol. */
215 HOWTO (R_CRIS_JUMP_SLOT, /* type */
217 2, /* size (0 = byte, 1 = short, 2 = long) */
219 FALSE, /* pc_relative */
221 complain_overflow_bitfield, /* complain_on_overflow */
222 bfd_elf_generic_reloc, /* special_function */
223 "R_CRIS_JUMP_SLOT", /* name */
224 FALSE, /* partial_inplace */
227 FALSE), /* pcrel_offset */
229 /* Used only by the dynamic linker. When the object is run, this
230 longword is set to the load address of the object, plus the
232 HOWTO (R_CRIS_RELATIVE, /* type */
234 2, /* size (0 = byte, 1 = short, 2 = long) */
236 FALSE, /* pc_relative */
238 complain_overflow_bitfield, /* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_CRIS_RELATIVE", /* name */
241 FALSE, /* partial_inplace */
243 0xffffffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
246 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
247 HOWTO (R_CRIS_16_GOT, /* type */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
251 FALSE, /* pc_relative */
253 complain_overflow_bitfield, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_CRIS_16_GOT", /* name */
256 FALSE, /* partial_inplace */
258 0xffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
261 HOWTO (R_CRIS_32_GOT, /* type */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
265 FALSE, /* pc_relative */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_CRIS_32_GOT", /* name */
270 FALSE, /* partial_inplace */
272 0xffffffff, /* dst_mask */
273 FALSE), /* pcrel_offset */
275 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
276 the GOT table for the symbol. */
277 HOWTO (R_CRIS_16_GOTPLT, /* type */
279 1, /* size (0 = byte, 1 = short, 2 = long) */
281 FALSE, /* pc_relative */
283 complain_overflow_bitfield, /* complain_on_overflow */
284 bfd_elf_generic_reloc, /* special_function */
285 "R_CRIS_16_GOTPLT", /* name */
286 FALSE, /* partial_inplace */
288 0xffff, /* dst_mask */
289 FALSE), /* pcrel_offset */
291 HOWTO (R_CRIS_32_GOTPLT, /* type */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
295 FALSE, /* pc_relative */
297 complain_overflow_bitfield, /* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_CRIS_32_GOTPLT", /* name */
300 FALSE, /* partial_inplace */
302 0xffffffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
305 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
307 HOWTO (R_CRIS_32_GOTREL, /* type */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
311 FALSE, /* pc_relative */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_CRIS_32_GOTREL", /* name */
316 FALSE, /* partial_inplace */
318 0xffffffff, /* dst_mask */
319 FALSE), /* pcrel_offset */
321 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
322 to create PLT entry for symbol. */
323 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
325 2, /* size (0 = byte, 1 = short, 2 = long) */
327 FALSE, /* pc_relative */
329 complain_overflow_bitfield, /* complain_on_overflow */
330 bfd_elf_generic_reloc, /* special_function */
331 "R_CRIS_32_PLT_GOTREL", /* name */
332 FALSE, /* partial_inplace */
334 0xffffffff, /* dst_mask */
335 FALSE), /* pcrel_offset */
337 /* A 32-bit offset from PC (location after the relocation) + addend to
338 entry for this symbol in PLT and request to create PLT entry for
340 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
342 2, /* size (0 = byte, 1 = short, 2 = long) */
344 TRUE, /* pc_relative */
346 complain_overflow_bitfield, /* complain_on_overflow */
347 cris_elf_pcrel_reloc, /* special_function */
348 "R_CRIS_32_PLT_PCREL", /* name */
349 FALSE, /* partial_inplace */
351 0xffffffff, /* dst_mask */
352 TRUE), /* pcrel_offset */
354 /* We don't handle these in any special manner and cross-format
355 linking is not supported; just recognize them enough to pass them
356 around. FIXME: do the same for most PIC relocs and add sanity
357 tests to actually refuse gracefully to handle these and PIC
358 relocs for cross-format linking. */
359 #define TLSHOWTO32(name) \
360 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
361 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
362 #define TLSHOWTO16X(name, X) \
363 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
364 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
365 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
366 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
368 TLSHOWTO32 (R_CRIS_32_GOT_GD),
369 TLSHOWTO16 (R_CRIS_16_GOT_GD),
370 TLSHOWTO32 (R_CRIS_32_GD),
371 TLSHOWTO32 (R_CRIS_DTP),
372 TLSHOWTO32 (R_CRIS_32_DTPREL),
373 TLSHOWTO16S (R_CRIS_16_DTPREL),
374 TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
375 TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
376 TLSHOWTO32 (R_CRIS_32_TPREL),
377 TLSHOWTO16S (R_CRIS_16_TPREL),
378 TLSHOWTO32 (R_CRIS_DTPMOD),
379 TLSHOWTO32 (R_CRIS_32_IE)
382 /* Map BFD reloc types to CRIS ELF reloc types. */
384 struct cris_reloc_map
386 bfd_reloc_code_real_type bfd_reloc_val;
387 unsigned int cris_reloc_val;
390 static const struct cris_reloc_map cris_reloc_map [] =
392 { BFD_RELOC_NONE, R_CRIS_NONE },
393 { BFD_RELOC_8, R_CRIS_8 },
394 { BFD_RELOC_16, R_CRIS_16 },
395 { BFD_RELOC_32, R_CRIS_32 },
396 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
397 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
398 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
399 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
400 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
401 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
402 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
403 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
404 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
405 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
406 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
407 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
408 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
409 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
410 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
411 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
412 { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD },
413 { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD },
414 { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD },
415 { BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
416 { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL },
417 { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL },
418 { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
419 { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
420 { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL },
421 { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL },
422 { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD },
423 { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE }
426 static reloc_howto_type *
427 cris_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
428 bfd_reloc_code_real_type code)
432 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
433 if (cris_reloc_map [i].bfd_reloc_val == code)
434 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
439 static reloc_howto_type *
440 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
445 i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
447 if (cris_elf_howto_table[i].name != NULL
448 && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
449 return &cris_elf_howto_table[i];
454 /* Set the howto pointer for an CRIS ELF reloc. */
457 cris_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
459 Elf_Internal_Rela * dst)
461 enum elf_cris_reloc_type r_type;
463 r_type = ELF32_R_TYPE (dst->r_info);
464 if (r_type >= R_CRIS_max)
466 _bfd_error_handler (_("%B: invalid CRIS reloc number: %d"), abfd, r_type);
469 cache_ptr->howto = & cris_elf_howto_table [r_type];
472 bfd_reloc_status_type
473 cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
474 arelent *reloc_entry,
476 void * data ATTRIBUTE_UNUSED,
477 asection *input_section,
479 char **error_message ATTRIBUTE_UNUSED)
481 /* By default (using only bfd_elf_generic_reloc when linking to
482 non-ELF formats) PC-relative relocs are relative to the beginning
483 of the reloc. CRIS PC-relative relocs are relative to the position
484 *after* the reloc because that's what pre-CRISv32 PC points to
485 after reading an insn field with that reloc. (For CRISv32, PC is
486 actually relative to the start of the insn, but we keep the old
487 definition.) Still, we use as much generic machinery as we can.
489 Only adjust when doing a final link. */
490 if (output_bfd == (bfd *) NULL)
491 reloc_entry->addend -= 1 << reloc_entry->howto->size;
494 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
495 input_section, output_bfd, error_message);
498 /* Support for core dump NOTE sections.
499 The slightly unintuitive code layout is an attempt to keep at least
500 some similarities with other ports, hoping to simplify general
501 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
504 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
509 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
510 switch (note->descsz)
515 case 202: /* Linux/CRISv32 */
517 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
520 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
529 switch (note->descsz)
534 case 214: /* Linux/CRIS */
536 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
539 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
548 /* Make a ".reg/999" section. */
549 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
550 size, note->descpos + offset);
554 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
556 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
557 switch (note->descsz)
562 case 124: /* Linux/CRISv32 elf_prpsinfo */
563 elf_tdata (abfd)->core->program
564 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
565 elf_tdata (abfd)->core->command
566 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
569 switch (note->descsz)
574 case 124: /* Linux/CRIS elf_prpsinfo */
575 elf_tdata (abfd)->core->program
576 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
577 elf_tdata (abfd)->core->command
578 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
581 /* Note that for some reason, a spurious space is tacked
582 onto the end of the args in some (at least one anyway)
583 implementations, so strip it off if it exists. */
586 char *command = elf_tdata (abfd)->core->command;
587 int n = strlen (command);
589 if (0 < n && command[n - 1] == ' ')
590 command[n - 1] = '\0';
596 /* The name of the dynamic interpreter. This is put in the .interp
599 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
601 /* The size in bytes of an entry in the procedure linkage table. */
603 #define PLT_ENTRY_SIZE 20
604 #define PLT_ENTRY_SIZE_V32 26
606 /* The first entry in an absolute procedure linkage table looks like this. */
608 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
611 0x7e, 0x7e, /* push mof. */
612 0x7f, 0x0d, /* (dip [pc+]) */
613 0, 0, 0, 0, /* Replaced with address of .got + 4. */
614 0x30, 0x7a, /* move [...],mof */
615 0x7f, 0x0d, /* (dip [pc+]) */
616 0, 0, 0, 0, /* Replaced with address of .got + 8. */
617 0x30, 0x09 /* jump [...] */
620 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
622 0x84, 0xe2, /* subq 4,$sp */
623 0x6f, 0xfe, /* move.d 0,$acr */
624 0, 0, 0, 0, /* Replaced by address of .got + 4. */
625 0x7e, 0x7a, /* move $mof,[$sp] */
626 0x3f, 0x7a, /* move [$acr],$mof */
627 0x04, 0xf2, /* addq 4,acr */
628 0x6f, 0xfa, /* move.d [$acr],$acr */
629 0xbf, 0x09, /* jump $acr */
630 0xb0, 0x05, /* nop */
631 0, 0 /* Pad out to 26 bytes. */
634 /* Subsequent entries in an absolute procedure linkage table look like
637 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
639 0x7f, 0x0d, /* (dip [pc+]) */
640 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
641 0x30, 0x09, /* jump [...] */
642 0x3f, 0x7e, /* move [pc+],mof */
643 0, 0, 0, 0, /* Replaced with offset into relocation table. */
644 0x2f, 0xfe, /* add.d [pc+],pc */
646 0xff, 0xff /* Replaced with offset to start of .plt. */
649 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
651 0x6f, 0xfe, /* move.d 0,$acr */
652 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
653 0x6f, 0xfa, /* move.d [$acr],$acr */
654 0xbf, 0x09, /* jump $acr */
655 0xb0, 0x05, /* nop */
656 0x3f, 0x7e, /* move 0,mof */
657 0, 0, 0, 0, /* Replaced with offset into relocation table. */
658 0xbf, 0x0e, /* ba start_of_plt0_entry */
659 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
663 /* The first entry in a PIC procedure linkage table looks like this. */
665 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
667 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
668 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
669 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
670 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
673 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
675 0x84, 0xe2, /* subq 4,$sp */
676 0x04, 0x01, /* addoq 4,$r0,$acr */
677 0x7e, 0x7a, /* move $mof,[$sp] */
678 0x3f, 0x7a, /* move [$acr],$mof */
679 0x04, 0xf2, /* addq 4,$acr */
680 0x6f, 0xfa, /* move.d [$acr],$acr */
681 0xbf, 0x09, /* jump $acr */
682 0xb0, 0x05, /* nop */
683 0, 0, /* Pad out to 26 bytes. */
688 /* Subsequent entries in a PIC procedure linkage table look like this. */
690 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
692 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
693 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
694 0x30, 0x09, /* jump [...] */
695 0x3f, 0x7e, /* move [pc+],mof */
696 0, 0, 0, 0, /* Replaced with offset into relocation table. */
697 0x2f, 0xfe, /* add.d [pc+],pc */
698 0xec, 0xff, /* Replaced with offset to start of .plt. */
702 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
704 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
705 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
706 0x6f, 0xfa, /* move.d [$acr],$acr */
707 0xbf, 0x09, /* jump $acr */
708 0xb0, 0x05, /* nop */
709 0x3f, 0x7e, /* move relocoffs,$mof */
710 0, 0, 0, 0, /* Replaced with offset into relocation table. */
711 0xbf, 0x0e, /* ba start_of_plt */
712 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
716 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
717 (and most other PIC/shlib stuff). Check that we don't drift away
720 The CRIS linker, like the m68k and i386 linkers (and probably the rest
721 too) needs to keep track of the number of relocs that it decides to
722 copy in check_relocs for each symbol. This is so that it can discard
723 PC relative relocs if it doesn't need them when linking with
724 -Bsymbolic. We store the information in a field extending the regular
725 ELF linker hash table. */
727 /* This structure keeps track of the number of PC relative relocs we have
728 copied for a given symbol. */
730 struct elf_cris_pcrel_relocs_copied
733 struct elf_cris_pcrel_relocs_copied *next;
735 /* A section in dynobj. */
738 /* Number of relocs copied in this section. */
741 /* Example of reloc being copied, for message. */
742 enum elf_cris_reloc_type r_type;
745 /* CRIS ELF linker hash entry. */
747 struct elf_cris_link_hash_entry
749 struct elf_link_hash_entry root;
751 /* Number of PC relative relocs copied for this symbol. */
752 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
754 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
755 both a general GOT and a PLT-specific GOT entry for the same symbol,
756 when it is referenced both as a function and as a function pointer.
758 Number of GOTPLT references for a function. */
759 bfd_signed_vma gotplt_refcount;
761 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
762 (zero is never used as an index). FIXME: We should be able to fold
763 this with gotplt_refcount in a union, like the got and plt unions in
764 elf_link_hash_entry. */
765 bfd_size_type gotplt_offset;
767 /* The root.got.refcount is the sum of the regular reference counts
768 (this) and those members below. We have to keep a separate count
769 to track when we've found the first (or last) reference to a
770 regular got entry. The offset is in root.got.offset. */
771 bfd_signed_vma reg_got_refcount;
773 /* Similar to the above, the number of reloc references to this
774 symbols that need a R_CRIS_32_TPREL slot. The offset is in
775 root.got.offset, because this and .dtp_refcount can't validly
776 happen when there's also a regular GOT entry; that's invalid
777 input for which an error is emitted. */
778 bfd_signed_vma tprel_refcount;
780 /* Similar to the above, the number of reloc references to this
781 symbols that need a R_CRIS_DTP slot. The offset is in
782 root.got.offset; plus 4 if .tprel_refcount > 0. */
783 bfd_signed_vma dtp_refcount;
787 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
790 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
793 /* The local_got_refcounts and local_got_offsets are a multiple of
794 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
795 refcount for GOT itself, see code), with the summary / group offset
796 for local symbols located at offset N, reference counts for
797 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
798 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
801 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
802 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
803 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
804 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
806 /* CRIS ELF linker hash table. */
808 struct elf_cris_link_hash_table
810 struct elf_link_hash_table root;
812 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
813 since we try and avoid creating GOTPLT:s when there's already a GOT.
814 Instead, we keep and update the next available index here. */
815 bfd_size_type next_gotplt_entry;
817 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
818 been seen for any input; if != 0, then the constant-offset
819 R_CRIS_DTPMOD is needed for this DSO/executable. This turns
820 negative at relocation, so that we don't need an extra flag for
821 when the reloc is output. */
822 bfd_signed_vma dtpmod_refcount;
825 /* Traverse a CRIS ELF linker hash table. */
827 #define elf_cris_link_hash_traverse(table, func, info) \
828 (elf_link_hash_traverse \
830 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
833 /* Get the CRIS ELF linker hash table from a link_info structure. */
835 #define elf_cris_hash_table(p) \
836 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
837 == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
839 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
840 "parent class"). The .root reference is just a simple type
841 check on the argument. */
843 #define elf_cris_hash_entry(p) \
844 ((struct elf_cris_link_hash_entry *) (&(p)->root))
846 /* Create an entry in a CRIS ELF linker hash table. */
848 static struct bfd_hash_entry *
849 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
850 struct bfd_hash_table *table,
853 struct elf_cris_link_hash_entry *ret =
854 (struct elf_cris_link_hash_entry *) entry;
856 /* Allocate the structure if it has not already been allocated by a
858 if (ret == (struct elf_cris_link_hash_entry *) NULL)
859 ret = ((struct elf_cris_link_hash_entry *)
860 bfd_hash_allocate (table,
861 sizeof (struct elf_cris_link_hash_entry)));
862 if (ret == (struct elf_cris_link_hash_entry *) NULL)
863 return (struct bfd_hash_entry *) ret;
865 /* Call the allocation method of the superclass. */
866 ret = ((struct elf_cris_link_hash_entry *)
867 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
869 if (ret != (struct elf_cris_link_hash_entry *) NULL)
871 ret->pcrel_relocs_copied = NULL;
872 ret->gotplt_refcount = 0;
873 ret->gotplt_offset = 0;
874 ret->dtp_refcount = 0;
875 ret->tprel_refcount = 0;
876 ret->reg_got_refcount = 0;
879 return (struct bfd_hash_entry *) ret;
882 /* Create a CRIS ELF linker hash table. */
884 static struct bfd_link_hash_table *
885 elf_cris_link_hash_table_create (bfd *abfd)
887 struct elf_cris_link_hash_table *ret;
888 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
890 ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
891 if (ret == (struct elf_cris_link_hash_table *) NULL)
894 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
895 elf_cris_link_hash_newfunc,
896 sizeof (struct elf_cris_link_hash_entry),
903 /* Initialize to skip over the first three entries in the gotplt; they
904 are used for run-time symbol evaluation. */
905 ret->next_gotplt_entry = 12;
907 return &ret->root.root;
910 /* Perform a single relocation. By default we use the standard BFD
911 routines, with a few tweaks. */
913 static bfd_reloc_status_type
914 cris_final_link_relocate (reloc_howto_type * howto,
916 asection * input_section,
918 Elf_Internal_Rela * rel,
921 bfd_reloc_status_type r;
922 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
924 /* PC-relative relocations are relative to the position *after*
925 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
926 not a single byte, since PC must be 16-bit-aligned. */
929 /* Check that the 16-bit GOT relocs are positive. */
930 case R_CRIS_16_GOTPLT:
932 if ((bfd_signed_vma) relocation < 0)
933 return bfd_reloc_overflow;
936 case R_CRIS_32_PLT_PCREL:
937 case R_CRIS_32_PCREL:
941 case R_CRIS_16_PCREL:
949 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
950 contents, rel->r_offset,
951 relocation, rel->r_addend);
956 /* The number of errors left before we stop outputting reloc-specific
957 explanatory messages. By coincidence, this works nicely together
958 with the default number of messages you'll get from LD about
959 "relocation truncated to fit" messages before you get an
960 "additional relocation overflows omitted from the output". */
961 static int additional_relocation_error_msg_count = 10;
963 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
964 copied, for further comments. */
967 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
968 struct bfd_link_info *info,
970 asection *input_section,
972 Elf_Internal_Rela *relocs,
973 Elf_Internal_Sym *local_syms,
974 asection **local_sections)
976 struct elf_cris_link_hash_table * htab;
978 Elf_Internal_Shdr *symtab_hdr;
979 struct elf_link_hash_entry **sym_hashes;
980 bfd_vma *local_got_offsets;
984 Elf_Internal_Rela *rel;
985 Elf_Internal_Rela *relend;
988 htab = elf_cris_hash_table (info);
992 dynobj = elf_hash_table (info)->dynobj;
993 local_got_offsets = elf_local_got_offsets (input_bfd);
994 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
995 sym_hashes = elf_sym_hashes (input_bfd);
996 relend = relocs + input_section->reloc_count;
1005 splt = bfd_get_linker_section (dynobj, ".plt");
1006 sgot = bfd_get_linker_section (dynobj, ".got");
1009 for (rel = relocs; rel < relend; rel ++)
1011 reloc_howto_type *howto;
1012 unsigned long r_symndx;
1013 Elf_Internal_Sym *sym;
1015 struct elf_link_hash_entry *h;
1017 bfd_reloc_status_type r;
1018 const char *symname = NULL;
1019 enum elf_cris_reloc_type r_type;
1021 r_type = ELF32_R_TYPE (rel->r_info);
1023 if ( r_type == R_CRIS_GNU_VTINHERIT
1024 || r_type == R_CRIS_GNU_VTENTRY)
1027 r_symndx = ELF32_R_SYM (rel->r_info);
1028 howto = cris_elf_howto_table + r_type;
1033 if (r_symndx < symtab_hdr->sh_info)
1035 sym = local_syms + r_symndx;
1036 sec = local_sections [r_symndx];
1037 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1039 symname = (bfd_elf_string_from_elf_section
1040 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1041 if (symname == NULL)
1042 symname = bfd_section_name (input_bfd, sec);
1046 bfd_boolean warned, ignored;
1047 bfd_boolean unresolved_reloc;
1049 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1050 r_symndx, symtab_hdr, sym_hashes,
1052 unresolved_reloc, warned, ignored);
1054 symname = h->root.root.string;
1056 if (unresolved_reloc
1057 /* Perhaps we should detect the cases that
1058 sec->output_section is expected to be NULL like i386 and
1059 m68k, but apparently (and according to elfxx-ia64.c) all
1060 valid cases are where the symbol is defined in a shared
1061 object which we link dynamically against. This includes
1062 PLT relocs for which we've created a PLT entry and other
1063 relocs for which we're prepared to create dynamic
1066 For now, new situations cause us to just err when
1067 sec->output_offset is NULL but the object with the symbol
1068 is *not* dynamically linked against. Thus this will
1069 automatically remind us so we can see if there are other
1070 valid cases we need to revisit. */
1071 && (sec->owner->flags & DYNAMIC) != 0)
1074 else if (h->root.type == bfd_link_hash_defined
1075 || h->root.type == bfd_link_hash_defweak)
1077 /* Here follow the cases where the relocation value must
1078 be zero (or when further handling is simplified when
1079 zero). I can't claim to understand the various
1080 conditions and they weren't described in the files
1081 where I copied them from (elf32-m68k.c and
1082 elf32-i386.c), but let's mention examples of where
1083 they happen. FIXME: Perhaps define and use a
1084 dynamic_symbol_p function like ia64.
1086 - When creating a shared library, we can have an
1087 ordinary relocation for a symbol defined in a shared
1088 library (perhaps the one we create). We then make
1089 the relocation value zero, as the value seen now will
1090 be added into the relocation addend in this shared
1091 library, but must be handled only at dynamic-link
1092 time. FIXME: Not sure this example covers the
1093 h->elf_link_hash_flags test, though it's there in
1095 if (bfd_link_pic (info)
1096 && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1098 && (input_section->flags & SEC_ALLOC) != 0
1099 && (r_type == R_CRIS_8
1100 || r_type == R_CRIS_16
1101 || r_type == R_CRIS_32
1102 || r_type == R_CRIS_8_PCREL
1103 || r_type == R_CRIS_16_PCREL
1104 || r_type == R_CRIS_32_PCREL))
1106 else if (!bfd_link_relocatable (info) && unresolved_reloc
1107 && (_bfd_elf_section_offset (output_bfd, info,
1113 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1116 cris_elf_howto_table[r_type].name,
1118 bfd_set_error (bfd_error_bad_value);
1124 if (sec != NULL && discarded_section (sec))
1125 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1126 rel, 1, relend, howto, 0, contents);
1128 if (bfd_link_relocatable (info))
1133 case R_CRIS_16_GOTPLT:
1134 case R_CRIS_32_GOTPLT:
1135 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1136 but we require a PLT, and the PLT handling will take care of
1137 filling in the PLT-specific GOT entry. For the GOT offset,
1138 calculate it as we do when filling it in for the .got.plt
1139 section. If we don't have a PLT, punt to GOT handling. */
1141 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1144 = bfd_get_linker_section (dynobj, ".got.plt");
1147 BFD_ASSERT (h->dynindx != -1);
1148 BFD_ASSERT (sgotplt != NULL);
1151 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1153 relocation = got_offset;
1157 /* We didn't make a PLT entry for this symbol. Maybe everything is
1158 folded into the GOT. Other than folding, this happens when
1159 statically linking PIC code, or when using -Bsymbolic. Check
1160 that we instead have a GOT entry as done for us by
1161 elf_cris_adjust_dynamic_symbol, and drop through into the
1162 ordinary GOT cases. This must not happen for the
1163 executable, because any reference it does to a function
1164 that is satisfied by a DSO must generate a PLT. We assume
1165 these call-specific relocs don't address non-functions. */
1167 && (h->got.offset == (bfd_vma) -1
1168 || (!bfd_link_pic (info)
1171 && h->root.type == bfd_link_hash_undefweak)))))
1173 (*_bfd_error_handler)
1174 ((h->got.offset == (bfd_vma) -1)
1175 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1176 " against symbol `%s'")
1177 : _("%B, section %A: No PLT for relocation %s"
1178 " against symbol `%s'"),
1181 cris_elf_howto_table[r_type].name,
1182 (symname != NULL && symname[0] != '\0'
1183 ? symname : _("[whose name is lost]")));
1185 /* FIXME: Perhaps blaming input is not the right thing to
1186 do; this is probably an internal error. But it is true
1187 that we didn't like that particular input. */
1188 bfd_set_error (bfd_error_bad_value);
1193 /* The size of the actual relocation is not used here; we only
1194 fill in the GOT table here. */
1200 /* Note that despite using RELA relocations, the .got contents
1201 is always filled in with the link-relative relocation
1202 value; the addend. */
1206 off = h->got.offset;
1207 BFD_ASSERT (off != (bfd_vma) -1);
1209 if (!elf_hash_table (info)->dynamic_sections_created
1210 || (! bfd_link_pic (info)
1212 || h->type == STT_FUNC
1214 || (bfd_link_pic (info)
1215 && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
1218 /* This wasn't checked above for ! bfd_link_pic (info), but
1219 must hold there if we get here; the symbol must
1220 be defined in the regular program or be undefweak
1221 or be a function or otherwise need a PLT. */
1222 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1223 || bfd_link_pic (info)
1225 || h->type == STT_FUNC
1227 || h->root.type == bfd_link_hash_undefweak);
1229 /* This is actually a static link, or it is a
1230 -Bsymbolic link and the symbol is defined locally,
1231 or is undefweak, or the symbol was forced to be
1232 local because of a version file, or we're not
1233 creating a dynamic object. We must initialize this
1234 entry in the global offset table. Since the offset
1235 must always be a multiple of 4, we use the least
1236 significant bit to record whether we have
1237 initialized it already.
1239 If this GOT entry should be runtime-initialized, we
1240 will create a .rela.got relocation entry to
1241 initialize the value. This is done in the
1242 finish_dynamic_symbol routine. */
1247 bfd_put_32 (output_bfd, relocation,
1248 sgot->contents + off);
1255 BFD_ASSERT (local_got_offsets != NULL
1256 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1258 off = local_got_offsets[r_symndx];
1260 /* The offset must always be a multiple of 4. We use
1261 the least significant bit to record whether we have
1262 already generated the necessary reloc. */
1267 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1269 if (bfd_link_pic (info))
1271 Elf_Internal_Rela outrel;
1274 if (srelgot == NULL)
1276 = bfd_get_linker_section (dynobj, ".rela.got");
1277 BFD_ASSERT (srelgot != NULL);
1279 outrel.r_offset = (sgot->output_section->vma
1280 + sgot->output_offset
1282 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1283 outrel.r_addend = relocation;
1284 loc = srelgot->contents;
1285 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1286 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1289 local_got_offsets[r_symndx] |= 1;
1293 relocation = sgot->output_offset + off;
1294 if (rel->r_addend != 0)
1296 /* We can't do anything for a relocation which is against
1297 a symbol *plus offset*. GOT holds relocations for
1298 symbols. Make this an error; the compiler isn't
1299 allowed to pass us these kinds of things. */
1301 (*_bfd_error_handler)
1302 (_("%B, section %A: relocation %s with non-zero addend %d"
1303 " against local symbol"),
1306 cris_elf_howto_table[r_type].name,
1309 (*_bfd_error_handler)
1310 (_("%B, section %A: relocation %s with non-zero addend %d"
1311 " against symbol `%s'"),
1314 cris_elf_howto_table[r_type].name,
1316 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1318 bfd_set_error (bfd_error_bad_value);
1324 case R_CRIS_32_GOTREL:
1325 /* This relocation must only be performed against local symbols.
1326 It's also ok when we link a program and the symbol is either
1327 defined in an ordinary (non-DSO) object or is undefined weak. */
1329 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1330 && !(!bfd_link_pic (info)
1333 && h->root.type == bfd_link_hash_undefweak))))
1335 (*_bfd_error_handler)
1336 (_("%B, section %A: relocation %s is"
1337 " not allowed for global symbol: `%s'"),
1340 cris_elf_howto_table[r_type].name,
1342 bfd_set_error (bfd_error_bad_value);
1346 /* This can happen if we get a link error with the input ELF
1347 variant mismatching the output variant. Emit an error so
1348 it's noticed if it happens elsewhere. */
1351 (*_bfd_error_handler)
1352 (_("%B, section %A: relocation %s with no GOT created"),
1355 cris_elf_howto_table[r_type].name);
1356 bfd_set_error (bfd_error_bad_value);
1360 /* This relocation is like a PC-relative one, except the
1361 reference point is the location of GOT. Note that
1362 sgot->output_offset is not involved in this calculation. We
1363 always want the start of entire .got section, not the
1364 position after the reserved header. */
1365 relocation -= sgot->output_section->vma;
1368 case R_CRIS_32_PLT_PCREL:
1369 /* Relocation is to the entry for this symbol in the
1370 procedure linkage table. */
1372 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1373 without using the procedure linkage table. */
1374 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1377 if (h->plt.offset == (bfd_vma) -1
1380 /* We didn't make a PLT entry for this symbol. This
1381 happens when statically linking PIC code, or when
1382 using -Bsymbolic. */
1386 relocation = (splt->output_section->vma
1387 + splt->output_offset
1391 case R_CRIS_32_PLT_GOTREL:
1392 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1393 start of the .got section. See also comment at
1395 relocation -= sgot->output_section->vma;
1397 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1398 without using the procedure linkage table. */
1399 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1402 if (h->plt.offset == (bfd_vma) -1
1405 /* We didn't make a PLT entry for this symbol. This
1406 happens when statically linking PIC code, or when
1407 using -Bsymbolic. */
1411 relocation = (splt->output_section->vma
1412 + splt->output_offset
1414 - sgot->output_section->vma);
1417 case R_CRIS_8_PCREL:
1418 case R_CRIS_16_PCREL:
1419 case R_CRIS_32_PCREL:
1420 /* If the symbol was local, we need no shlib-specific handling. */
1421 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1422 || h->dynindx == -1)
1429 if (bfd_link_pic (info)
1430 && r_symndx != STN_UNDEF
1431 && (input_section->flags & SEC_ALLOC) != 0
1432 && ((r_type != R_CRIS_8_PCREL
1433 && r_type != R_CRIS_16_PCREL
1434 && r_type != R_CRIS_32_PCREL)
1435 || (!SYMBOLIC_BIND (info, h)
1436 || (h != NULL && !h->def_regular))))
1438 Elf_Internal_Rela outrel;
1440 bfd_boolean skip, relocate;
1442 /* When generating a shared object, these relocations
1443 are copied into the output file to be resolved at run
1448 sreloc = _bfd_elf_get_dynamic_reloc_section
1449 (dynobj, input_section, /*rela?*/ TRUE);
1450 /* The section should have been created in cris_elf_check_relocs,
1451 but that function will not be called for objects which fail in
1452 cris_elf_merge_private_bfd_data. */
1455 bfd_set_error (bfd_error_bad_value);
1464 _bfd_elf_section_offset (output_bfd, info, input_section,
1466 if (outrel.r_offset == (bfd_vma) -1)
1468 else if (outrel.r_offset == (bfd_vma) -2
1469 /* For now, undefined weak symbols with non-default
1470 visibility (yielding 0), like exception info for
1471 discarded sections, will get a R_CRIS_NONE
1472 relocation rather than no relocation, because we
1473 notice too late that the symbol doesn't need a
1476 && h->root.type == bfd_link_hash_undefweak
1477 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1478 skip = TRUE, relocate = TRUE;
1479 outrel.r_offset += (input_section->output_section->vma
1480 + input_section->output_offset);
1483 memset (&outrel, 0, sizeof outrel);
1484 /* h->dynindx may be -1 if the symbol was marked to
1487 && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1488 || !h->def_regular))
1490 BFD_ASSERT (h->dynindx != -1);
1491 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1492 outrel.r_addend = relocation + rel->r_addend;
1496 outrel.r_addend = relocation + rel->r_addend;
1498 if (r_type == R_CRIS_32)
1501 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1507 if (bfd_is_abs_section (sec))
1509 else if (sec == NULL || sec->owner == NULL)
1511 bfd_set_error (bfd_error_bad_value);
1518 /* We are turning this relocation into one
1519 against a section symbol. It would be
1520 proper to subtract the symbol's value,
1521 osec->vma, from the emitted reloc addend,
1522 but ld.so expects buggy relocs. */
1523 osec = sec->output_section;
1524 indx = elf_section_data (osec)->dynindx;
1527 osec = htab->root.text_index_section;
1528 indx = elf_section_data (osec)->dynindx;
1530 BFD_ASSERT (indx != 0);
1533 outrel.r_info = ELF32_R_INFO (indx, r_type);
1537 loc = sreloc->contents;
1538 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1539 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1541 /* This reloc will be computed at runtime, so there's no
1542 need to do anything now, except for R_CRIS_32 relocations
1543 that have been turned into R_CRIS_RELATIVE. */
1550 case R_CRIS_16_DTPREL:
1551 case R_CRIS_32_DTPREL:
1552 /* This relocation must only be performed against local
1553 symbols, or to sections that are not loadable. It's also
1554 ok when we link a program and the symbol is defined in an
1555 ordinary (non-DSO) object (if it's undefined there, we've
1556 already seen an error). */
1558 && (input_section->flags & SEC_ALLOC) != 0
1559 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1560 && (bfd_link_pic (info)
1562 && h->root.type != bfd_link_hash_undefined)))
1564 (*_bfd_error_handler)
1565 ((h->root.type == bfd_link_hash_undefined)
1566 /* We shouldn't get here for GCC-emitted code. */
1567 ? _("%B, section %A: relocation %s has an undefined"
1568 " reference to `%s', perhaps a declaration mixup?")
1569 : ("%B, section %A: relocation %s is"
1570 " not allowed for `%s', a global symbol with default"
1571 " visibility, perhaps a declaration mixup?"),
1574 cris_elf_howto_table[r_type].name,
1575 symname != NULL && symname[0] != '\0'
1576 ? symname : _("[whose name is lost]"));
1577 bfd_set_error (bfd_error_bad_value);
1581 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1582 || htab->dtpmod_refcount != 0);
1584 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1585 already done so. Note that we do this in .got.plt, not
1586 in .got, as .got.plt contains the first part, still the
1587 reloc is against .got, because the linker script directs
1588 (is required to direct) them both into .got. */
1589 if (htab->dtpmod_refcount > 0
1590 && (input_section->flags & SEC_ALLOC) != 0)
1592 asection *sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1593 BFD_ASSERT (sgotplt != NULL);
1595 if (bfd_link_pic (info))
1597 Elf_Internal_Rela outrel;
1600 if (srelgot == NULL)
1601 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1602 BFD_ASSERT (srelgot != NULL);
1603 loc = srelgot->contents;
1604 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1606 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1607 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1608 outrel.r_offset = (sgotplt->output_section->vma
1609 + sgotplt->output_offset
1611 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1612 outrel.r_addend = 0;
1613 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1617 /* For an executable, the GOT entry contents is known. */
1618 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1619 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1622 /* Reverse the sign to mark that we've emitted the
1623 required GOT entry. */
1624 htab->dtpmod_refcount = - htab->dtpmod_refcount;
1627 /* The relocation is the offset from the start of the module
1628 TLS block to the (local) symbol. */
1629 relocation -= elf_hash_table (info)->tls_sec == NULL
1630 ? 0 : elf_hash_table (info)->tls_sec->vma;
1634 if (bfd_link_pic (info))
1636 bfd_set_error (bfd_error_invalid_operation);
1638 /* We've already informed in cris_elf_check_relocs that
1639 this is an error. */
1644 case R_CRIS_16_GOT_GD:
1645 case R_CRIS_32_GOT_GD:
1646 if (rel->r_addend != 0)
1648 /* We can't do anything for a relocation which is against a
1649 symbol *plus offset*. The GOT holds relocations for
1650 symbols. Make this an error; the compiler isn't allowed
1651 to pass us these kinds of things. */
1652 (*_bfd_error_handler)
1653 (_("%B, section %A: relocation %s with non-zero addend %d"
1654 " against symbol `%s'"),
1657 cris_elf_howto_table[r_type].name,
1659 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1661 bfd_set_error (bfd_error_bad_value);
1665 if (!bfd_link_pic (info)
1666 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1668 /* Known contents of the GOT. */
1671 /* The symbol is defined in the program, so just write
1672 (1, known_tpoffset) into the GOT. */
1673 relocation -= elf_hash_table (info)->tls_sec->vma;
1677 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1678 ? h->got.offset + 4 : h->got.offset;
1682 off = local_got_offsets[r_symndx];
1683 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1687 /* We use bit 1 of the offset as a flag for GOT entry with
1688 the R_CRIS_DTP reloc, setting it when we've emitted the
1689 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1698 local_got_offsets[r_symndx] |= 2;
1700 bfd_put_32 (output_bfd, 1, sgot->contents + off);
1701 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1706 relocation = sgot->output_offset + off
1707 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1711 /* Not all parts of the GOT entry are known; emit a real
1716 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1717 ? h->got.offset + 4 : h->got.offset;
1720 off = local_got_offsets[r_symndx];
1721 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1725 /* See above re bit 1 and bit 0 usage. */
1728 Elf_Internal_Rela outrel;
1736 local_got_offsets[r_symndx] |= 2;
1738 /* Clear the target contents of the GOT (just as a
1739 gesture; it's already cleared on allocation): this
1740 relocation is not like the other dynrelocs. */
1741 bfd_put_32 (output_bfd, 0, sgot->contents + off);
1742 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1744 if (srelgot == NULL)
1745 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1746 BFD_ASSERT (srelgot != NULL);
1748 if (h != NULL && h->dynindx != -1)
1750 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1755 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1757 /* NULL if we had an error. */
1758 relocation -= elf_hash_table (info)->tls_sec == NULL
1759 ? 0 : elf_hash_table (info)->tls_sec->vma;
1762 outrel.r_offset = (sgot->output_section->vma
1763 + sgot->output_offset
1765 outrel.r_addend = relocation;
1766 loc = srelgot->contents;
1767 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1769 /* NULL if we had an error. */
1770 if (srelgot->contents != NULL)
1771 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1776 relocation = sgot->output_offset + off
1777 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1780 /* The GOT-relative offset to the GOT entry is the
1781 relocation, or for R_CRIS_32_GD, the actual address of
1786 if (bfd_link_pic (info))
1788 bfd_set_error (bfd_error_invalid_operation);
1790 /* We've already informed in cris_elf_check_relocs that
1791 this is an error. */
1796 case R_CRIS_32_GOT_TPREL:
1797 case R_CRIS_16_GOT_TPREL:
1798 if (rel->r_addend != 0)
1800 /* We can't do anything for a relocation which is
1801 against a symbol *plus offset*. GOT holds
1802 relocations for symbols. Make this an error; the
1803 compiler isn't allowed to pass us these kinds of
1805 (*_bfd_error_handler)
1806 (_("%B, section %A: relocation %s with non-zero addend %d"
1807 " against symbol `%s'"),
1810 cris_elf_howto_table[r_type].name,
1812 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1813 bfd_set_error (bfd_error_bad_value);
1817 if (!bfd_link_pic (info)
1818 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1820 /* Known contents of the GOT. */
1823 /* The symbol is defined in the program, so just write
1824 the -prog_tls_size+known_tpoffset into the GOT. */
1825 relocation -= elf_hash_table (info)->tls_sec->vma;
1826 relocation -= elf_hash_table (info)->tls_size;
1829 off = h->got.offset;
1831 off = local_got_offsets[r_symndx];
1833 /* Bit 0 is used to mark whether we've emitted the required
1834 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1835 is used similarly for R_CRIS_DTP, see above. */
1843 local_got_offsets[r_symndx] |= 1;
1845 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1850 relocation = sgot->output_offset + off
1851 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1855 /* Emit a real relocation. */
1859 off = h->got.offset;
1861 off = local_got_offsets[r_symndx];
1863 /* See above re usage of bit 0 and 1. */
1866 Elf_Internal_Rela outrel;
1874 local_got_offsets[r_symndx] |= 1;
1876 if (srelgot == NULL)
1877 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1878 BFD_ASSERT (srelgot != NULL);
1880 if (h != NULL && h->dynindx != -1)
1882 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1887 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1889 /* NULL if we had an error. */
1890 relocation -= elf_hash_table (info)->tls_sec == NULL
1891 ? 0 : elf_hash_table (info)->tls_sec->vma;
1894 /* Just "define" the initial contents in some
1895 semi-logical way. */
1896 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1898 outrel.r_offset = (sgot->output_section->vma
1899 + sgot->output_offset
1901 outrel.r_addend = relocation;
1902 loc = srelgot->contents;
1903 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1904 /* NULL if we had an error. */
1905 if (srelgot->contents != NULL)
1906 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1911 relocation = sgot->output_offset + off
1912 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1915 /* The GOT-relative offset to the GOT entry is the relocation,
1916 or for R_CRIS_32_GD, the actual address of the GOT entry. */
1919 case R_CRIS_16_TPREL:
1920 case R_CRIS_32_TPREL:
1921 /* This relocation must only be performed against symbols
1922 defined in an ordinary (non-DSO) object. */
1923 if (bfd_link_pic (info))
1925 bfd_set_error (bfd_error_invalid_operation);
1927 /* We've already informed in cris_elf_check_relocs that
1928 this is an error. */
1933 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1934 && !(h->def_regular || ELF_COMMON_DEF_P (h))
1935 /* If it's undefined, then an error message has already
1937 && h->root.type != bfd_link_hash_undefined)
1939 (*_bfd_error_handler)
1940 (_("%B, section %A: relocation %s is"
1941 " not allowed for symbol: `%s'"
1942 " which is defined outside the program,"
1943 " perhaps a declaration mixup?"),
1946 cris_elf_howto_table[r_type].name,
1948 bfd_set_error (bfd_error_bad_value);
1952 /* NULL if we had an error. */
1953 relocation -= elf_hash_table (info)->tls_sec == NULL
1955 : (elf_hash_table (info)->tls_sec->vma
1956 + elf_hash_table (info)->tls_size);
1958 /* The TLS-relative offset is the relocation. */
1966 r = cris_final_link_relocate (howto, input_bfd, input_section,
1967 contents, rel, relocation);
1969 if (r != bfd_reloc_ok)
1971 const char * msg = (const char *) NULL;
1975 case bfd_reloc_overflow:
1976 r = info->callbacks->reloc_overflow
1977 (info, (h ? &h->root : NULL), symname, howto->name,
1978 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1979 if (additional_relocation_error_msg_count > 0)
1981 additional_relocation_error_msg_count--;
1984 case R_CRIS_16_GOTPLT:
1987 /* Not just TLS is involved here, so we make
1988 generation and message depend on -fPIC/-fpic
1990 case R_CRIS_16_GOT_TPREL:
1991 case R_CRIS_16_GOT_GD:
1992 (*_bfd_error_handler)
1993 (_("(too many global variables for -fpic:"
1994 " recompile with -fPIC)"));
1997 case R_CRIS_16_TPREL:
1998 case R_CRIS_16_DTPREL:
1999 (*_bfd_error_handler)
2000 (_("(thread-local data too big for -fpic or"
2001 " -msmall-tls: recompile with -fPIC or"
2002 " -mno-small-tls)"));
2005 /* No known cause for overflow for other relocs. */
2012 case bfd_reloc_undefined:
2013 r = info->callbacks->undefined_symbol
2014 (info, symname, input_bfd, input_section, rel->r_offset,
2018 case bfd_reloc_outofrange:
2019 msg = _("internal error: out of range error");
2022 case bfd_reloc_notsupported:
2023 msg = _("internal error: unsupported relocation error");
2026 case bfd_reloc_dangerous:
2027 msg = _("internal error: dangerous relocation");
2031 msg = _("internal error: unknown error");
2036 r = info->callbacks->warning
2037 (info, msg, symname, input_bfd, input_section, rel->r_offset);
2047 /* Finish up dynamic symbol handling. We set the contents of various
2048 dynamic sections here. */
2051 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2052 struct bfd_link_info *info,
2053 struct elf_link_hash_entry *h,
2054 Elf_Internal_Sym *sym)
2056 struct elf_cris_link_hash_table * htab;
2059 /* Where in the plt entry to put values. */
2060 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2062 /* What offset to add to the distance to the first PLT entry for the
2063 value at plt_off3. */
2064 int plt_off3_value_bias = 4;
2066 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2067 for PIC and non-PIC for v32 and pre-v32). */
2068 int plt_stub_offset = 8;
2069 int plt_entry_size = PLT_ENTRY_SIZE;
2070 const bfd_byte *plt_entry = elf_cris_plt_entry;
2071 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2073 htab = elf_cris_hash_table (info);
2077 /* Adjust the various PLT entry offsets. */
2078 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2082 plt_off3_value_bias = -2;
2083 plt_stub_offset = 12;
2084 plt_entry_size = PLT_ENTRY_SIZE_V32;
2085 plt_entry = elf_cris_plt_entry_v32;
2086 plt_pic_entry = elf_cris_pic_plt_entry_v32;
2089 dynobj = elf_hash_table (info)->dynobj;
2091 if (h->plt.offset != (bfd_vma) -1)
2098 bfd_vma gotplt_offset
2099 = elf_cris_hash_entry (h)->gotplt_offset;
2100 Elf_Internal_Rela rela;
2102 bfd_boolean has_gotplt = gotplt_offset != 0;
2104 /* Get the index in the .rela.plt relocations for the .got.plt
2105 entry that corresponds to this symbol.
2106 We have to count backwards here, and the result is only valid
2107 as an index into .rela.plt. We also have to undo the effect
2108 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2109 .got.plt) for which gotplt_offset is adjusted, because while
2110 that entry goes into .got.plt, its relocation goes into
2111 .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2112 processed as part of the runtime lazy .rela.plt relocation).
2113 FIXME: There be literal constants here... */
2114 bfd_vma rela_plt_index
2115 = (htab->dtpmod_refcount != 0
2116 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2118 /* Get the offset into the .got table of the entry that corresponds
2119 to this function. Note that we embed knowledge that "incoming"
2120 .got goes after .got.plt in the output without padding (pointer
2121 aligned). However, that knowledge is present in several other
2126 : h->got.offset + htab->next_gotplt_entry);
2128 /* This symbol has an entry in the procedure linkage table. Set it
2131 BFD_ASSERT (h->dynindx != -1);
2133 splt = bfd_get_linker_section (dynobj, ".plt");
2134 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2135 srela = bfd_get_linker_section (dynobj, ".rela.plt");
2136 BFD_ASSERT (splt != NULL && sgotplt != NULL
2137 && (! has_gotplt || srela != NULL));
2139 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2141 /* Fill in the entry in the procedure linkage table. */
2142 if (! bfd_link_pic (info))
2144 memcpy (splt->contents + h->plt.offset, plt_entry,
2147 /* We need to enter the absolute address of the GOT entry here. */
2148 bfd_put_32 (output_bfd, got_base + got_offset,
2149 splt->contents + h->plt.offset + plt_off1);
2153 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2155 bfd_put_32 (output_bfd, got_offset,
2156 splt->contents + h->plt.offset + plt_off1);
2159 /* Fill in the plt entry and make a relocation, if this is a "real"
2163 /* Fill in the offset to the reloc table. */
2164 bfd_put_32 (output_bfd,
2165 rela_plt_index * sizeof (Elf32_External_Rela),
2166 splt->contents + h->plt.offset + plt_off2);
2168 /* Fill in the offset to the first PLT entry, where to "jump". */
2169 bfd_put_32 (output_bfd,
2170 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2171 splt->contents + h->plt.offset + plt_off3);
2173 /* Fill in the entry in the global offset table with the address of
2174 the relocating stub. */
2175 bfd_put_32 (output_bfd,
2176 (splt->output_section->vma
2177 + splt->output_offset
2180 sgotplt->contents + got_offset);
2182 /* Fill in the entry in the .rela.plt section. */
2183 rela.r_offset = (sgotplt->output_section->vma
2184 + sgotplt->output_offset
2186 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2188 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2189 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2192 if (!h->def_regular)
2194 /* Mark the symbol as undefined, rather than as defined in
2195 the .plt section. Leave the value alone. */
2196 sym->st_shndx = SHN_UNDEF;
2198 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2199 know whether resetting the value is significant; if it really
2200 is, rather than a quirk or bug in the sparc port, then I
2201 believe we'd see this elsewhere. */
2202 /* If the symbol is weak, we do need to clear the value.
2203 Otherwise, the PLT entry would provide a definition for
2204 the symbol even if the symbol wasn't defined anywhere,
2205 and so the symbol would never be NULL. */
2206 if (!h->ref_regular_nonweak)
2211 /* For an ordinary program, we emit .got relocs only for symbols that
2212 are in the dynamic-symbols table and are either defined by the
2213 program or are undefined weak symbols, or are function symbols
2214 where we do not output a PLT: the PLT reloc was output above and all
2215 references to the function symbol are redirected to the PLT. */
2216 if (h->got.offset != (bfd_vma) -1
2217 && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2218 && (bfd_link_pic (info)
2219 || (h->dynindx != -1
2220 && h->plt.offset == (bfd_vma) -1
2222 && h->root.type != bfd_link_hash_undefweak)))
2226 Elf_Internal_Rela rela;
2230 /* This symbol has an entry in the global offset table. Set it up. */
2232 sgot = bfd_get_linker_section (dynobj, ".got");
2233 srela = bfd_get_linker_section (dynobj, ".rela.got");
2234 BFD_ASSERT (sgot != NULL && srela != NULL);
2236 rela.r_offset = (sgot->output_section->vma
2237 + sgot->output_offset
2238 + (h->got.offset &~ (bfd_vma) 1));
2240 /* If this is a static link, or it is a -Bsymbolic link and the
2241 symbol is defined locally or was forced to be local because
2242 of a version file, we just want to emit a RELATIVE reloc.
2243 The entry in the global offset table will already have been
2244 initialized in the relocate_section function. */
2245 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2246 if (! elf_hash_table (info)->dynamic_sections_created
2247 || (bfd_link_pic (info)
2248 && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
2251 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2252 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2256 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2257 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2261 loc = srela->contents;
2262 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2263 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2269 Elf_Internal_Rela rela;
2272 /* This symbol needs a copy reloc. Set it up. */
2274 BFD_ASSERT (h->dynindx != -1
2275 && (h->root.type == bfd_link_hash_defined
2276 || h->root.type == bfd_link_hash_defweak));
2278 s = bfd_get_linker_section (dynobj, ".rela.bss");
2279 BFD_ASSERT (s != NULL);
2281 rela.r_offset = (h->root.u.def.value
2282 + h->root.u.def.section->output_section->vma
2283 + h->root.u.def.section->output_offset);
2284 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2286 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2287 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2290 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2291 if (h == elf_hash_table (info)->hdynamic
2292 || h == elf_hash_table (info)->hgot)
2293 sym->st_shndx = SHN_ABS;
2298 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2299 offsets were changed, as part of -z combreloc handling, from those we
2303 elf_cris_finish_dynamic_sections (bfd *output_bfd,
2304 struct bfd_link_info *info)
2310 dynobj = elf_hash_table (info)->dynobj;
2312 sgot = bfd_get_linker_section (dynobj, ".got.plt");
2313 BFD_ASSERT (sgot != NULL);
2314 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2316 if (elf_hash_table (info)->dynamic_sections_created)
2319 Elf32_External_Dyn *dyncon, *dynconend;
2321 splt = bfd_get_linker_section (dynobj, ".plt");
2322 BFD_ASSERT (splt != NULL && sdyn != NULL);
2324 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2325 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2326 for (; dyncon < dynconend; dyncon++)
2328 Elf_Internal_Dyn dyn;
2331 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2339 s = bfd_get_section_by_name (output_bfd, ".got");
2340 BFD_ASSERT (s != NULL);
2341 dyn.d_un.d_ptr = s->vma;
2342 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2346 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2347 if all symbols are found in the .got (not .got.plt). */
2348 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2349 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2350 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2354 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2358 dyn.d_un.d_val = s->size;
2359 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2363 /* The procedure linkage table relocs (DT_JMPREL) should
2364 not be included in the overall relocs (DT_RELA).
2365 Therefore, we override the DT_RELASZ entry here to
2366 make it not include the JMPREL relocs. Since the
2367 linker script arranges for .rela.plt to follow all
2368 other relocation sections, we don't have to worry
2369 about changing the DT_RELA entry. */
2370 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2372 dyn.d_un.d_val -= s->size;
2373 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2378 /* Fill in the first entry in the procedure linkage table. */
2381 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2383 if (bfd_link_pic (info))
2384 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2385 PLT_ENTRY_SIZE_V32);
2388 memcpy (splt->contents, elf_cris_plt0_entry_v32,
2389 PLT_ENTRY_SIZE_V32);
2390 bfd_put_32 (output_bfd,
2391 sgot->output_section->vma
2392 + sgot->output_offset + 4,
2393 splt->contents + 4);
2395 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2396 = PLT_ENTRY_SIZE_V32;
2401 if (bfd_link_pic (info))
2402 memcpy (splt->contents, elf_cris_pic_plt0_entry,
2406 memcpy (splt->contents, elf_cris_plt0_entry,
2408 bfd_put_32 (output_bfd,
2409 sgot->output_section->vma
2410 + sgot->output_offset + 4,
2411 splt->contents + 6);
2412 bfd_put_32 (output_bfd,
2413 sgot->output_section->vma
2414 + sgot->output_offset + 8,
2415 splt->contents + 14);
2417 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2424 /* Fill in the first three entries in the global offset table. */
2428 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2430 bfd_put_32 (output_bfd,
2431 sdyn->output_section->vma + sdyn->output_offset,
2433 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2434 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2437 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2442 /* Return the section that should be marked against GC for a given
2446 cris_elf_gc_mark_hook (asection *sec,
2447 struct bfd_link_info *info,
2448 Elf_Internal_Rela *rel,
2449 struct elf_link_hash_entry *h,
2450 Elf_Internal_Sym *sym)
2452 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2456 case R_CRIS_GNU_VTINHERIT:
2457 case R_CRIS_GNU_VTENTRY:
2464 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2467 /* Update the got entry reference counts for the section being removed. */
2470 cris_elf_gc_sweep_hook (bfd *abfd,
2471 struct bfd_link_info *info,
2473 const Elf_Internal_Rela *relocs)
2475 struct elf_cris_link_hash_table * htab;
2476 Elf_Internal_Shdr *symtab_hdr;
2477 struct elf_link_hash_entry **sym_hashes;
2478 bfd_signed_vma *local_got_refcounts;
2479 const Elf_Internal_Rela *rel, *relend;
2484 if (bfd_link_relocatable (info))
2487 dynobj = elf_hash_table (info)->dynobj;
2491 htab = elf_cris_hash_table (info);
2495 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2496 sym_hashes = elf_sym_hashes (abfd);
2497 local_got_refcounts = elf_local_got_refcounts (abfd);
2499 sgot = bfd_get_linker_section (dynobj, ".got");
2500 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2502 relend = relocs + sec->reloc_count;
2503 for (rel = relocs; rel < relend; rel++)
2505 unsigned long r_symndx;
2506 struct elf_link_hash_entry *h = NULL;
2507 bfd_signed_vma got_element_size = 4;
2508 bfd_signed_vma *specific_refcount = NULL;
2509 enum elf_cris_reloc_type r_type;
2511 r_symndx = ELF32_R_SYM (rel->r_info);
2512 if (r_symndx >= symtab_hdr->sh_info)
2514 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2515 while (h->root.type == bfd_link_hash_indirect
2516 || h->root.type == bfd_link_hash_warning)
2517 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2520 r_type = ELF32_R_TYPE (rel->r_info);
2525 case R_CRIS_16_GOTPLT:
2526 case R_CRIS_32_GOTPLT:
2527 specific_refcount = h != NULL
2528 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2529 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2533 case R_CRIS_32_GOT_GD:
2534 case R_CRIS_16_GOT_GD:
2535 got_element_size = 8;
2536 specific_refcount = h != NULL
2537 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2538 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2542 case R_CRIS_16_GOT_TPREL:
2543 case R_CRIS_32_GOT_TPREL:
2544 specific_refcount = h != NULL
2545 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2546 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2557 case R_CRIS_16_GOT_TPREL:
2558 case R_CRIS_32_GOT_TPREL:
2559 case R_CRIS_32_GOT_GD:
2560 case R_CRIS_16_GOT_GD:
2565 /* If the counters are 0 when we got here, we've
2566 miscounted somehow somewhere, an internal error. */
2567 BFD_ASSERT (h->got.refcount > 0);
2570 BFD_ASSERT (*specific_refcount > 0);
2571 --*specific_refcount;
2572 if (*specific_refcount == 0)
2574 /* We don't need the .got entry any more. */
2575 sgot->size -= got_element_size;
2576 srelgot->size -= sizeof (Elf32_External_Rela);
2582 if (local_got_refcounts != NULL)
2584 /* If the counters are 0 when we got here, we've
2585 miscounted somehow somewhere, an internal error. */
2586 BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2587 --local_got_refcounts[r_symndx];
2589 BFD_ASSERT (*specific_refcount > 0);
2590 --*specific_refcount;
2591 if (*specific_refcount == 0)
2593 /* We don't need the .got entry any more. */
2594 sgot->size -= got_element_size;
2595 if (bfd_link_pic (info))
2596 srelgot->size -= sizeof (Elf32_External_Rela);
2601 case R_CRIS_16_GOTPLT:
2602 case R_CRIS_32_GOTPLT:
2603 /* For local symbols, treat these like GOT relocs. */
2605 goto local_got_reloc;
2607 /* For global symbols, adjust the reloc-specific refcount. */
2608 elf_cris_hash_entry (h)->gotplt_refcount--;
2611 case R_CRIS_32_PLT_GOTREL:
2612 /* FIXME: We don't garbage-collect away the .got section. */
2613 if (local_got_refcounts != NULL)
2614 local_got_refcounts[-1]--;
2620 case R_CRIS_8_PCREL:
2621 case R_CRIS_16_PCREL:
2622 case R_CRIS_32_PCREL:
2623 case R_CRIS_32_PLT_PCREL:
2624 /* Negate the increment we did in cris_elf_check_relocs. */
2627 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2628 && h->plt.refcount > 0)
2633 case R_CRIS_32_DTPREL:
2634 /* This'd be a .dtpreld entry in e.g. debug info. */
2635 if ((sec->flags & SEC_ALLOC) == 0)
2638 case R_CRIS_16_DTPREL:
2639 htab->dtpmod_refcount--;
2640 if (htab->dtpmod_refcount == 0)
2641 htab->next_gotplt_entry -= 8;
2642 BFD_ASSERT (local_got_refcounts != NULL);
2643 local_got_refcounts[-1]--;
2654 /* The elf_backend_plt_sym_val hook function. */
2657 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2660 bfd_size_type plt_entry_size;
2661 bfd_size_type pltoffs;
2662 bfd *abfd = plt->owner;
2664 /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */
2665 bfd_size_type plt_entry_got_offset = 2;
2666 bfd_size_type plt_sec_size;
2667 bfd_size_type got_vma_for_dyn;
2670 /* FIXME: the .got section should be readily available also when
2671 we're not linking. */
2672 if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2673 return (bfd_vma) -1;
2675 plt_sec_size = bfd_section_size (plt->owner, plt);
2677 = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2678 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2680 /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */
2681 got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2683 /* Because we can have merged GOT entries; a single .got entry for
2684 both GOT and the PLT part of the GOT (.got.plt), the index of the
2685 reloc in .rela.plt is not the same as the index in the PLT.
2686 Instead, we have to hunt down the GOT offset in the PLT that
2687 corresponds to that of this reloc. Unfortunately, we will only
2688 be called for the .rela.plt relocs, so we'll miss synthetic
2689 symbols for .plt entries with merged GOT entries. (FIXME:
2690 fixable by providing our own bfd_elf32_get_synthetic_symtab.
2691 Doesn't seem worthwile at time of this writing.) FIXME: we've
2692 gone from O(1) to O(N) (N number of PLT entries) for finding each
2693 PLT address. Shouldn't matter in practice though. */
2695 for (pltoffs = plt_entry_size;
2696 pltoffs < plt_sec_size;
2697 pltoffs += plt_entry_size)
2699 bfd_size_type got_offset;
2700 bfd_byte gotoffs_raw[4];
2702 if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2703 pltoffs + plt_entry_got_offset,
2704 sizeof (gotoffs_raw)))
2705 return (bfd_vma) -1;
2707 got_offset = bfd_get_32 (abfd, gotoffs_raw);
2708 if (got_offset + got_vma_for_dyn == rel->address)
2709 return plt->vma + pltoffs;
2712 /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2713 that'd not be graceful behavior for invalid input. */
2714 return (bfd_vma) -1;
2717 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2718 entry but we found we will not create any. Called when we find we will
2719 not have any PLT for this symbol, by for example
2720 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2721 or elf_cris_size_dynamic_sections if no dynamic sections will be
2722 created (we're only linking static objects). */
2725 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2727 struct bfd_link_info *info = (struct bfd_link_info *) p;
2729 /* A GOTPLT reloc, when activated, is supposed to be included into
2730 the PLT refcount. */
2731 BFD_ASSERT (h->gotplt_refcount == 0
2732 || h->gotplt_refcount <= h->root.plt.refcount);
2734 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2735 if (h->gotplt_refcount <= 0)
2738 if (h->reg_got_refcount > 0)
2740 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2741 Probably not necessary at this stage, but keeping them accurate
2742 helps avoiding surprises later. */
2743 h->root.got.refcount += h->gotplt_refcount;
2744 h->reg_got_refcount += h->gotplt_refcount;
2745 h->gotplt_refcount = 0;
2749 /* No GOT entry for this symbol. We need to create one. */
2750 bfd *dynobj = elf_hash_table (info)->dynobj;
2754 BFD_ASSERT (dynobj != NULL);
2755 sgot = bfd_get_linker_section (dynobj, ".got");
2756 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2758 /* Put accurate refcounts there. */
2759 h->root.got.refcount += h->gotplt_refcount;
2760 h->reg_got_refcount = h->gotplt_refcount;
2762 h->gotplt_refcount = 0;
2764 /* We always have a .got and a .rela.got section if there were
2765 GOTPLT relocs in input. */
2766 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2768 /* Allocate space in the .got section. */
2771 /* Allocate relocation space. */
2772 srelgot->size += sizeof (Elf32_External_Rela);
2778 /* Try to fold PLT entries with GOT entries. There are two cases when we
2781 - When all PLT references are GOTPLT references, and there are GOT
2782 references, and this is not the executable. We don't have to
2783 generate a PLT at all.
2785 - When there are both (ordinary) PLT references and GOT references,
2786 and this isn't the executable.
2787 We want to make the PLT reference use the ordinary GOT entry rather
2788 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2789 since the GOT entry will have to be resolved at startup anyway.
2791 Though the latter case is handled when room for the PLT is allocated,
2794 By folding into the GOT, we may need a round-trip to a PLT in the
2795 executable for calls, a loss in performance. Still, losing a
2796 reloc is a win in size and at least in start-up time.
2798 Note that this function is called before symbols are forced local by
2799 version scripts. The differing cases are handled by
2800 elf_cris_hide_symbol. */
2803 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2805 struct bfd_link_info *info = (struct bfd_link_info *) p;
2807 /* If there are no GOT references for this symbol, we can't fold any
2808 other reference so there's nothing to do. Likewise if there are no
2809 PLT references; GOTPLT references included. */
2810 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2813 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2814 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2816 if (h->gotplt_refcount == h->root.plt.refcount)
2818 /* The only PLT references are GOTPLT references, and there are GOT
2819 references. Convert PLT to GOT references. */
2820 if (! elf_cris_adjust_gotplt_to_got (h, info))
2823 /* Clear the PLT references, so no PLT will be created. */
2824 h->root.plt.offset = (bfd_vma) -1;
2830 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2831 to use a GOT entry (and create one) rather than requiring a GOTPLT
2835 elf_cris_hide_symbol (struct bfd_link_info *info,
2836 struct elf_link_hash_entry *h,
2837 bfd_boolean force_local)
2839 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2841 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2844 /* Adjust a symbol defined by a dynamic object and referenced by a
2845 regular object. The current definition is in some section of the
2846 dynamic object, but we're not including those sections. We have to
2847 change the definition to something the rest of the link can
2851 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2852 struct elf_link_hash_entry *h)
2854 struct elf_cris_link_hash_table * htab;
2857 bfd_size_type plt_entry_size;
2859 htab = elf_cris_hash_table (info);
2863 dynobj = elf_hash_table (info)->dynobj;
2865 /* Make sure we know what is going on here. */
2866 BFD_ASSERT (dynobj != NULL
2868 || h->u.weakdef != NULL
2871 && !h->def_regular)));
2874 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2875 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2877 /* If this is a function, put it in the procedure linkage table. We
2878 will fill in the contents of the procedure linkage table later,
2879 when we know the address of the .got section. */
2880 if (h->type == STT_FUNC
2883 /* If we link a program (not a DSO), we'll get rid of unnecessary
2884 PLT entries; we point to the actual symbols -- even for pic
2885 relocs, because a program built with -fpic should have the same
2886 result as one built without -fpic, specifically considering weak
2888 FIXME: m68k and i386 differ here, for unclear reasons. */
2889 if (! bfd_link_pic (info)
2892 /* This case can occur if we saw a PLT reloc in an input file,
2893 but the symbol was not defined by a dynamic object. In such
2894 a case, we don't actually need to build a procedure linkage
2895 table, and we can just do an absolute or PC reloc instead, or
2896 change a .got.plt index to a .got index for GOTPLT relocs. */
2897 BFD_ASSERT (h->needs_plt);
2899 h->plt.offset = (bfd_vma) -1;
2901 elf_cris_adjust_gotplt_to_got ((struct
2902 elf_cris_link_hash_entry *) h,
2906 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2907 where a pointer-equivalent symbol was unimportant (i.e. more
2908 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2909 of the PLT. We can't for the executable, because the GOT
2910 entries will point to the PLT there (and be constant). */
2911 if (bfd_link_pic (info)
2912 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2916 /* GC or folding may have rendered this entry unused. */
2917 if (h->plt.refcount <= 0)
2920 h->plt.offset = (bfd_vma) -1;
2924 /* Make sure this symbol is output as a dynamic symbol. */
2925 if (h->dynindx == -1)
2927 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2931 s = bfd_get_linker_section (dynobj, ".plt");
2932 BFD_ASSERT (s != NULL);
2934 /* If this is the first .plt entry, make room for the special
2937 s->size += plt_entry_size;
2939 /* If this symbol is not defined in a regular file, and we are
2940 not generating a shared library, then set the symbol to this
2941 location in the .plt. */
2942 if (!bfd_link_pic (info)
2945 h->root.u.def.section = s;
2946 h->root.u.def.value = s->size;
2949 /* If there's already a GOT entry, use that, not a .got.plt. A
2950 GOT field still has a reference count when we get here; it's
2951 not yet changed to an offset. We can't do this for an
2952 executable, because then the reloc associated with the PLT
2953 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2954 this to elf_cris_try_fold_plt_to_got. */
2955 if (bfd_link_pic (info) && h->got.refcount > 0)
2957 h->got.refcount += h->plt.refcount;
2959 /* Mark the PLT offset to use the GOT entry by setting the low
2960 bit in the plt offset; it is always a multiple of
2961 plt_entry_size (which is at least a multiple of 2). */
2962 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2964 /* Change the PLT refcount to an offset. */
2965 h->plt.offset = s->size;
2967 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2968 that the got entry should be used instead. */
2969 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2970 h)->gotplt_offset == 0);
2972 /* Make room for this entry. */
2973 s->size += plt_entry_size;
2978 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2979 h->plt.offset = s->size;
2981 /* Make room for this entry. */
2982 s->size += plt_entry_size;
2984 /* We also need to make an entry in the .got.plt section, which
2985 will be placed in the .got section by the linker script. */
2986 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2987 = htab->next_gotplt_entry;
2988 htab->next_gotplt_entry += 4;
2990 s = bfd_get_linker_section (dynobj, ".got.plt");
2991 BFD_ASSERT (s != NULL);
2994 /* We also need to make an entry in the .rela.plt section. */
2996 s = bfd_get_linker_section (dynobj, ".rela.plt");
2997 BFD_ASSERT (s != NULL);
2998 s->size += sizeof (Elf32_External_Rela);
3003 /* Reinitialize the plt offset now that it is not used as a reference
3005 h->plt.offset = (bfd_vma) -1;
3007 /* If this is a weak symbol, and there is a real definition, the
3008 processor independent code will have arranged for us to see the
3009 real definition first, and we can just use the same value. */
3010 if (h->u.weakdef != NULL)
3012 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3013 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3014 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3015 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3019 /* This is a reference to a symbol defined by a dynamic object which
3020 is not a function. */
3022 /* If we are creating a shared library, we must presume that the
3023 only references to the symbol are via the global offset table.
3024 For such cases we need not do anything here; the relocations will
3025 be handled correctly by relocate_section. */
3026 if (bfd_link_pic (info))
3029 /* If there are no references to this symbol that do not use the
3030 GOT, we don't need to generate a copy reloc. */
3031 if (!h->non_got_ref)
3034 /* We must allocate the symbol in our .dynbss section, which will
3035 become part of the .bss section of the executable. There will be
3036 an entry for this symbol in the .dynsym section. The dynamic
3037 object will contain position independent code, so all references
3038 from the dynamic object to this symbol will go through the global
3039 offset table. The dynamic linker will use the .dynsym entry to
3040 determine the address it must put in the global offset table, so
3041 both the dynamic object and the regular object will refer to the
3042 same memory location for the variable. */
3044 s = bfd_get_linker_section (dynobj, ".dynbss");
3045 BFD_ASSERT (s != NULL);
3047 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3048 copy the initial value out of the dynamic object and into the
3049 runtime process image. We need to remember the offset into the
3050 .rela.bss section we are going to use. */
3051 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3055 srel = bfd_get_linker_section (dynobj, ".rela.bss");
3056 BFD_ASSERT (srel != NULL);
3057 srel->size += sizeof (Elf32_External_Rela);
3061 return _bfd_elf_adjust_dynamic_copy (info, h, s);
3064 /* Adjust our "subclass" elements for an indirect symbol. */
3067 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3068 struct elf_link_hash_entry *dir,
3069 struct elf_link_hash_entry *ind)
3071 struct elf_cris_link_hash_entry *edir, *eind;
3073 edir = (struct elf_cris_link_hash_entry *) dir;
3074 eind = (struct elf_cris_link_hash_entry *) ind;
3076 /* Only indirect symbols are replaced; we're not interested in
3077 updating any of EIND's fields for other symbols. */
3078 if (eind->root.root.type != bfd_link_hash_indirect)
3080 /* Still, we need to copy flags for e.g. weak definitions. */
3081 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3085 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3087 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3088 #define XMOVE(F) XMOVOPZ (F, +=, 0)
3089 if (eind->pcrel_relocs_copied != NULL)
3091 if (edir->pcrel_relocs_copied != NULL)
3093 struct elf_cris_pcrel_relocs_copied **pp;
3094 struct elf_cris_pcrel_relocs_copied *p;
3096 /* Add reloc counts against the indirect sym to the direct sym
3097 list. Merge any entries against the same section. */
3098 for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
3100 struct elf_cris_pcrel_relocs_copied *q;
3102 for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
3103 if (q->section == p->section)
3105 q->count += p->count;
3112 *pp = edir->pcrel_relocs_copied;
3114 XMOVOPZ (pcrel_relocs_copied, =, NULL);
3116 XMOVE (gotplt_refcount);
3117 XMOVE (gotplt_offset);
3118 XMOVE (reg_got_refcount);
3119 XMOVE (tprel_refcount);
3120 XMOVE (dtp_refcount);
3124 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3127 /* Look through the relocs for a section during the first phase. */
3130 cris_elf_check_relocs (bfd *abfd,
3131 struct bfd_link_info *info,
3133 const Elf_Internal_Rela *relocs)
3135 struct elf_cris_link_hash_table * htab;
3137 Elf_Internal_Shdr *symtab_hdr;
3138 struct elf_link_hash_entry **sym_hashes;
3139 bfd_signed_vma *local_got_refcounts;
3140 const Elf_Internal_Rela *rel;
3141 const Elf_Internal_Rela *rel_end;
3146 if (bfd_link_relocatable (info))
3149 htab = elf_cris_hash_table (info);
3153 dynobj = elf_hash_table (info)->dynobj;
3154 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3155 sym_hashes = elf_sym_hashes (abfd);
3156 local_got_refcounts = elf_local_got_refcounts (abfd);
3162 rel_end = relocs + sec->reloc_count;
3163 for (rel = relocs; rel < rel_end; rel++)
3165 struct elf_link_hash_entry *h;
3166 unsigned long r_symndx;
3167 enum elf_cris_reloc_type r_type;
3168 bfd_signed_vma got_element_size = 4;
3169 unsigned long r_symndx_lgot = INT_MAX;
3171 r_symndx = ELF32_R_SYM (rel->r_info);
3172 if (r_symndx < symtab_hdr->sh_info)
3175 r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3179 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3180 while (h->root.type == bfd_link_hash_indirect
3181 || h->root.type == bfd_link_hash_warning)
3182 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3184 /* PR15323, ref flags aren't set for references in the same
3186 h->root.non_ir_ref = 1;
3189 r_type = ELF32_R_TYPE (rel->r_info);
3191 /* Some relocs require linker-created sections; we need to hang them
3192 on the first input bfd we found that contained dynamic relocs. */
3195 case R_CRIS_32_DTPREL:
3196 if ((sec->flags & SEC_ALLOC) == 0)
3197 /* This'd be a .dtpreld entry in e.g. debug info. We have
3198 several different switch statements below, but none of
3199 that is needed; we need no preparations for resolving
3200 R_CRIS_32_DTPREL into a non-allocated section (debug
3201 info), so let's just move on to the next
3205 case R_CRIS_16_DTPREL:
3206 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3207 entry at index 3. */
3208 if (htab->dtpmod_refcount == 0)
3209 htab->next_gotplt_entry += 8;
3211 htab->dtpmod_refcount++;
3216 case R_CRIS_16_GOT_GD:
3217 case R_CRIS_32_GOT_GD:
3218 case R_CRIS_32_GOT_TPREL:
3219 case R_CRIS_16_GOT_TPREL:
3222 case R_CRIS_32_GOTREL:
3223 case R_CRIS_32_PLT_GOTREL:
3224 case R_CRIS_32_PLT_PCREL:
3225 case R_CRIS_16_GOTPLT:
3226 case R_CRIS_32_GOTPLT:
3229 elf_hash_table (info)->dynobj = dynobj = abfd;
3231 /* We could handle this if we can get a handle on the
3232 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3233 that, we must insist on dynobj being a specific mach. */
3234 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3236 (*_bfd_error_handler)
3237 (_("%B, section %A:\n v10/v32 compatible object %s"
3238 " must not contain a PIC relocation"),
3246 /* We may have a dynobj but no .got section, if machine-
3247 independent parts of the linker found a reason to create
3248 a dynobj. We want to create the .got section now, so we
3249 can assume it's always present whenever there's a dynobj.
3250 It's ok to call this function more than once. */
3251 if (!_bfd_elf_create_got_section (dynobj, info))
3254 sgot = bfd_get_linker_section (dynobj, ".got");
3257 if (local_got_refcounts == NULL)
3261 /* We use index local_got_refcounts[-1] to count all
3262 GOT-relative relocations that do not have explicit
3264 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3265 amt *= sizeof (bfd_signed_vma);
3266 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3267 if (local_got_refcounts == NULL)
3270 local_got_refcounts++;
3271 elf_local_got_refcounts (abfd) = local_got_refcounts;
3279 /* Some relocs require a global offset table (but perhaps not a
3280 specific GOT entry). */
3283 case R_CRIS_16_DTPREL:
3284 case R_CRIS_32_DTPREL:
3285 /* Not requesting .got.rela for an executable: the contents
3286 of the first entry is constant there. For a shared
3287 library, we need .got.rela for the R_CRIS_DTPMOD
3288 relocation at index 3. */
3289 if (!bfd_link_pic (info))
3295 case R_CRIS_16_GOT_GD:
3296 case R_CRIS_32_GOT_GD:
3297 case R_CRIS_32_GOT_TPREL:
3298 case R_CRIS_16_GOT_TPREL:
3301 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3302 entry only for local symbols. Unfortunately, we don't know
3303 until later on if there's a version script that forces the
3304 symbol local. We must have the .rela.got section in place
3305 before we know if the symbol looks global now, so we need
3306 to treat the reloc just like for R_CRIS_16_GOT and
3308 case R_CRIS_16_GOTPLT:
3309 case R_CRIS_32_GOTPLT:
3313 && (h != NULL || bfd_link_pic (info)))
3315 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
3316 if (srelgot == NULL)
3318 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3319 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3321 srelgot = bfd_make_section_anyway_with_flags (dynobj,
3325 || !bfd_set_section_alignment (dynobj, srelgot, 2))
3335 /* Warn and error for invalid input. */
3339 case R_CRIS_32_TPREL:
3340 case R_CRIS_16_TPREL:
3342 if (bfd_link_pic (info))
3344 (*_bfd_error_handler)
3345 (_("%B, section %A:\n relocation %s not valid"
3346 " in a shared object;"
3347 " typically an option mixup, recompile with -fPIC"),
3350 cris_elf_howto_table[r_type].name);
3351 /* Don't return FALSE here; we want messages for all of
3352 these and the error behavior is ungraceful
3362 case R_CRIS_16_GOT_GD:
3363 case R_CRIS_32_GOT_GD:
3364 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3365 got_element_size = 8;
3366 r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3369 case R_CRIS_16_DTPREL:
3370 case R_CRIS_32_DTPREL:
3371 /* These two just request for the constant-index
3372 module-local tls_index-sized GOT entry, which we add
3377 case R_CRIS_32_GOT_TPREL:
3378 case R_CRIS_16_GOT_TPREL:
3379 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3381 /* Those relocs also require that a DSO is of type
3382 Initial Exec. Like other targets, we don't reset this
3383 flag even if the relocs are GC:ed away. */
3384 if (bfd_link_pic (info))
3385 info->flags |= DF_STATIC_TLS;
3388 /* Let's list the other assembler-generated TLS-relocs too,
3389 just to show that they're not forgotten. */
3390 case R_CRIS_16_TPREL:
3391 case R_CRIS_32_TPREL:
3398 case R_CRIS_16_GOTPLT:
3399 case R_CRIS_32_GOTPLT:
3400 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3401 entry) is eliminated. We can only do this for a non-local
3405 elf_cris_hash_entry (h)->gotplt_refcount++;
3406 goto handle_gotplt_reloc;
3408 /* If h is NULL then this is a local symbol, and we must make a
3409 GOT entry for it, so handle it like a GOT reloc. */
3414 case R_CRIS_16_GOT_GD:
3415 case R_CRIS_32_GOT_GD:
3416 case R_CRIS_32_GOT_TPREL:
3417 case R_CRIS_16_GOT_TPREL:
3420 /* This symbol requires a global offset table entry. */
3423 if (h->got.refcount == 0)
3425 /* Make sure this symbol is output as a dynamic symbol. */
3426 if (h->dynindx == -1)
3428 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3433 /* Update the sum of reloc counts for this symbol. */
3440 if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3442 /* Allocate space in the .got section. */
3443 sgot->size += got_element_size;
3444 /* Allocate relocation space. */
3445 srelgot->size += sizeof (Elf32_External_Rela);
3447 elf_cris_hash_entry (h)->reg_got_refcount++;
3451 case R_CRIS_16_GOT_GD:
3452 case R_CRIS_32_GOT_GD:
3453 if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3455 /* Allocate space in the .got section. */
3456 sgot->size += got_element_size;
3457 /* Allocate relocation space. */
3458 srelgot->size += sizeof (Elf32_External_Rela);
3460 elf_cris_hash_entry (h)->dtp_refcount++;
3464 case R_CRIS_32_GOT_TPREL:
3465 case R_CRIS_16_GOT_TPREL:
3466 if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3468 /* Allocate space in the .got section. */
3469 sgot->size += got_element_size;
3470 /* Allocate relocation space. */
3471 srelgot->size += sizeof (Elf32_External_Rela);
3473 elf_cris_hash_entry (h)->tprel_refcount++;
3483 /* This is a global offset table entry for a local symbol. */
3484 if (local_got_refcounts[r_symndx_lgot] == 0)
3486 sgot->size += got_element_size;
3487 if (bfd_link_pic (info))
3489 /* If we are generating a shared object, we need
3490 to output a R_CRIS_RELATIVE reloc so that the
3491 dynamic linker can adjust this GOT entry.
3492 Similarly for non-regular got entries. */
3493 srelgot->size += sizeof (Elf32_External_Rela);
3496 /* Update the reloc-specific count. */
3497 local_got_refcounts[r_symndx_lgot]++;
3499 /* This one is the sum of all the others. */
3500 local_got_refcounts[r_symndx]++;
3504 case R_CRIS_16_DTPREL:
3505 case R_CRIS_32_DTPREL:
3506 case R_CRIS_32_GOTREL:
3507 /* This reference requires a global offset table.
3508 FIXME: The actual refcount isn't used currently; the .got
3509 section can't be removed if there were any references in the
3511 local_got_refcounts[-1]++;
3514 handle_gotplt_reloc:
3516 case R_CRIS_32_PLT_GOTREL:
3517 /* This reference requires a global offset table. */
3518 local_got_refcounts[-1]++;
3521 case R_CRIS_32_PLT_PCREL:
3522 /* This symbol requires a procedure linkage table entry. We
3523 actually build the entry in adjust_dynamic_symbol,
3524 because this might be a case of linking PIC code which is
3525 never referenced by a dynamic object, in which case we
3526 don't need to generate a procedure linkage table entry
3529 /* Beware: if we'd check for visibility of the symbol here
3530 (and not marking the need for a PLT when non-visible), we'd
3531 get into trouble with keeping handling consistent with
3532 regards to relocs found before definition and GOTPLT
3533 handling. Eliminable PLT entries will be dealt with later
3545 /* Let's help debug shared library creation. Any of these
3546 relocs *can* be used in shared libs, but pages containing
3547 them cannot be shared, so they're not appropriate for
3548 common use. Don't warn for sections we don't care about,
3549 such as debug sections or non-constant sections. We
3550 can't help tables of (global) function pointers, for
3551 example, though they must be emitted in a (writable) data
3552 section to avoid having impure text sections. */
3553 if (bfd_link_pic (info)
3554 && (sec->flags & SEC_ALLOC) != 0
3555 && (sec->flags & SEC_READONLY) != 0)
3557 /* FIXME: How do we make this optionally a warning only? */
3558 (*_bfd_error_handler)
3559 (_("%B, section %A:\n relocation %s should not"
3560 " be used in a shared object; recompile with -fPIC"),
3563 cris_elf_howto_table[r_type].name);
3566 /* We don't need to handle relocs into sections not going into
3567 the "real" output. */
3568 if ((sec->flags & SEC_ALLOC) == 0)
3575 /* Make sure a plt entry is created for this symbol if it
3576 turns out to be a function defined by a dynamic object. */
3577 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3581 /* If we are creating a shared library and this is not a local
3582 symbol, we need to copy the reloc into the shared library.
3583 However when linking with -Bsymbolic and this is a global
3584 symbol which is defined in an object we are including in the
3585 link (i.e., DEF_REGULAR is set), then we can resolve the
3586 reloc directly. At this point we have not seen all the input
3587 files, so it is possible that DEF_REGULAR is not set now but
3588 will be set later (it is never cleared). In case of a weak
3589 definition, DEF_REGULAR may be cleared later by a strong
3590 definition in a shared library. We account for that
3591 possibility below by storing information in the relocs_copied
3592 field of the hash table entry. A similar situation occurs
3593 when creating shared libraries and symbol visibility changes
3594 render the symbol local. */
3596 /* No need to do anything if we're not creating a shared object. */
3597 if (! bfd_link_pic (info))
3600 /* We may need to create a reloc section in the dynobj and made room
3604 sreloc = _bfd_elf_make_dynamic_reloc_section
3605 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3611 if (sec->flags & SEC_READONLY)
3612 info->flags |= DF_TEXTREL;
3614 sreloc->size += sizeof (Elf32_External_Rela);
3617 case R_CRIS_8_PCREL:
3618 case R_CRIS_16_PCREL:
3619 case R_CRIS_32_PCREL:
3624 /* Make sure a plt entry is created for this symbol if it
3625 turns out to be a function defined by a dynamic object. */
3626 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3630 /* If we are creating a shared library and this is not a local
3631 symbol, we need to copy the reloc into the shared library.
3632 However when linking with -Bsymbolic and this is a global
3633 symbol which is defined in an object we are including in the
3634 link (i.e., DEF_REGULAR is set), then we can resolve the
3635 reloc directly. At this point we have not seen all the input
3636 files, so it is possible that DEF_REGULAR is not set now but
3637 will be set later (it is never cleared). In case of a weak
3638 definition, DEF_REGULAR may be cleared later by a strong
3639 definition in a shared library. We account for that
3640 possibility below by storing information in the relocs_copied
3641 field of the hash table entry. A similar situation occurs
3642 when creating shared libraries and symbol visibility changes
3643 render the symbol local. */
3645 /* No need to do anything if we're not creating a shared object. */
3646 if (! bfd_link_pic (info))
3649 /* We don't need to handle relocs into sections not going into
3650 the "real" output. */
3651 if ((sec->flags & SEC_ALLOC) == 0)
3654 /* If the symbol is local, then we know already we can
3655 eliminate the reloc. */
3656 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3659 /* If this is with -Bsymbolic and the symbol isn't weak, and
3660 is defined by an ordinary object (the ones we include in
3661 this shared library) then we can also eliminate the
3662 reloc. See comment above for more eliminable cases which
3663 we can't identify at this time. */
3664 if (SYMBOLIC_BIND (info, h)
3665 && h->root.type != bfd_link_hash_defweak
3669 /* We may need to create a reloc section in the dynobj and made room
3673 sreloc = _bfd_elf_make_dynamic_reloc_section
3674 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3680 sreloc->size += sizeof (Elf32_External_Rela);
3682 /* We count the number of PC relative relocations we have
3683 entered for this symbol, so that we can discard them
3684 again if the symbol is later defined by a regular object.
3685 We know that h is really a pointer to an
3686 elf_cris_link_hash_entry. */
3688 struct elf_cris_link_hash_entry *eh;
3689 struct elf_cris_pcrel_relocs_copied *p;
3691 eh = elf_cris_hash_entry (h);
3693 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3694 if (p->section == sec)
3699 p = ((struct elf_cris_pcrel_relocs_copied *)
3700 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3703 p->next = eh->pcrel_relocs_copied;
3704 eh->pcrel_relocs_copied = p;
3714 /* This relocation describes the C++ object vtable hierarchy.
3715 Reconstruct it for later use during GC. */
3716 case R_CRIS_GNU_VTINHERIT:
3717 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3721 /* This relocation describes which C++ vtable entries are actually
3722 used. Record for later use during GC. */
3723 case R_CRIS_GNU_VTENTRY:
3724 BFD_ASSERT (h != NULL);
3726 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3730 case R_CRIS_16_TPREL:
3731 case R_CRIS_32_TPREL:
3732 /* Already warned above, when necessary. */
3736 /* Other relocs do not appear here. */
3737 bfd_set_error (bfd_error_bad_value);
3745 /* Set the sizes of the dynamic sections. */
3748 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3749 struct bfd_link_info *info)
3751 struct elf_cris_link_hash_table * htab;
3757 htab = elf_cris_hash_table (info);
3761 dynobj = elf_hash_table (info)->dynobj;
3762 BFD_ASSERT (dynobj != NULL);
3764 if (elf_hash_table (info)->dynamic_sections_created)
3766 /* Set the contents of the .interp section to the interpreter. */
3767 if (bfd_link_executable (info) && !info->nointerp)
3769 s = bfd_get_linker_section (dynobj, ".interp");
3770 BFD_ASSERT (s != NULL);
3771 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3772 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3777 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3778 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3781 /* We may have created entries in the .rela.got section.
3782 However, if we are not creating the dynamic sections, we will
3783 not actually use these entries. Reset the size of .rela.got,
3784 which will cause it to get stripped from the output file
3786 s = bfd_get_linker_section (dynobj, ".rela.got");
3791 /* If this is a -Bsymbolic shared link, then we need to discard all PC
3792 relative relocs against symbols defined in a regular object. We
3793 allocated space for them in the check_relocs routine, but we will not
3794 fill them in in the relocate_section routine. We also discard space
3795 for relocs that have become for local symbols due to symbol
3796 visibility changes. For programs, we discard space for relocs for
3797 symbols not referenced by any dynamic object. */
3798 if (bfd_link_pic (info))
3799 elf_cris_link_hash_traverse (htab,
3800 elf_cris_discard_excess_dso_dynamics,
3803 elf_cris_link_hash_traverse (htab,
3804 elf_cris_discard_excess_program_dynamics,
3807 /* The check_relocs and adjust_dynamic_symbol entry points have
3808 determined the sizes of the various dynamic sections. Allocate
3812 for (s = dynobj->sections; s != NULL; s = s->next)
3816 if ((s->flags & SEC_LINKER_CREATED) == 0)
3819 /* It's OK to base decisions on the section name, because none
3820 of the dynobj section names depend upon the input files. */
3821 name = bfd_get_section_name (dynobj, s);
3823 if (strcmp (name, ".plt") == 0)
3825 /* Remember whether there is a PLT. */
3828 else if (strcmp (name, ".got.plt") == 0)
3830 /* The .got.plt contains the .got header as well as the
3831 actual .got.plt contents. The .got header may contain a
3832 R_CRIS_DTPMOD entry at index 3. */
3833 s->size += htab->dtpmod_refcount != 0
3836 else if (CONST_STRNEQ (name, ".rela"))
3838 if (strcmp (name, ".rela.got") == 0
3839 && htab->dtpmod_refcount != 0
3840 && bfd_link_pic (info))
3841 s->size += sizeof (Elf32_External_Rela);
3845 /* Remember whether there are any reloc sections other
3847 if (strcmp (name, ".rela.plt") != 0)
3850 /* We use the reloc_count field as a counter if we need
3851 to copy relocs into the output file. */
3855 else if (! CONST_STRNEQ (name, ".got")
3856 && strcmp (name, ".dynbss") != 0)
3858 /* It's not one of our sections, so don't allocate space. */
3864 /* If we don't need this section, strip it from the
3865 output file. This is mostly to handle .rela.bss and
3866 .rela.plt. We must create both sections in
3867 create_dynamic_sections, because they must be created
3868 before the linker maps input sections to output
3869 sections. The linker does that before
3870 adjust_dynamic_symbol is called, and it is that
3871 function which decides whether anything needs to go
3872 into these sections. */
3873 s->flags |= SEC_EXCLUDE;
3877 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3880 /* Allocate memory for the section contents. We use bfd_zalloc here
3881 in case unused entries are not reclaimed before the section's
3882 contents are written out. This should not happen, but this way
3883 if it does, we will not write out garbage. For reloc sections,
3884 this will make entries have the type R_CRIS_NONE. */
3885 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3886 if (s->contents == NULL)
3890 if (elf_hash_table (info)->dynamic_sections_created)
3892 /* Add some entries to the .dynamic section. We fill in the
3893 values later, in elf_cris_finish_dynamic_sections, but we
3894 must add the entries now so that we get the correct size for
3895 the .dynamic section. The DT_DEBUG entry is filled in by the
3896 dynamic linker and used by the debugger. */
3897 #define add_dynamic_entry(TAG, VAL) \
3898 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3900 if (!bfd_link_pic (info))
3902 if (!add_dynamic_entry (DT_DEBUG, 0))
3908 if (!add_dynamic_entry (DT_PLTGOT, 0)
3909 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3910 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3911 || !add_dynamic_entry (DT_JMPREL, 0))
3917 if (!add_dynamic_entry (DT_RELA, 0)
3918 || !add_dynamic_entry (DT_RELASZ, 0)
3919 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3923 if ((info->flags & DF_TEXTREL) != 0)
3925 if (!add_dynamic_entry (DT_TEXTREL, 0))
3927 info->flags |= DF_TEXTREL;
3930 #undef add_dynamic_entry
3935 /* This function is called via elf_cris_link_hash_traverse if we are
3936 creating a shared object. In the -Bsymbolic case, it discards the
3937 space allocated to copy PC relative relocs against symbols which
3938 are defined in regular objects. For the normal non-symbolic case,
3939 we also discard space for relocs that have become local due to
3940 symbol visibility changes. We allocated space for them in the
3941 check_relocs routine, but we won't fill them in in the
3942 relocate_section routine. */
3945 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3948 struct elf_cris_pcrel_relocs_copied *s;
3949 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3951 /* If a symbol has been forced local or we have found a regular
3952 definition for the symbolic link case, then we won't be needing
3954 if (h->root.def_regular
3955 && (h->root.forced_local
3956 || SYMBOLIC_BIND (info, &h->root)))
3958 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3961 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3965 sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3970 /* If we have accounted for PC-relative relocs for read-only
3971 sections, now is the time to warn for them. We can't do it in
3972 cris_elf_check_relocs, because we don't know the status of all
3973 symbols at that time (and it's common to force symbols local
3976 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3977 if ((s->section->flags & SEC_READONLY) != 0)
3979 /* FIXME: How do we make this optionally a warning only? */
3980 (*_bfd_error_handler)
3981 (_("%B, section `%A', to symbol `%s':\n"
3982 " relocation %s should not be used"
3983 " in a shared object; recompile with -fPIC"),
3986 h->root.root.root.string,
3987 cris_elf_howto_table[s->r_type].name);
3989 info->flags |= DF_TEXTREL;
3995 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3996 creating a shared object. We discard space for relocs for symbols put
3997 in the .got, but which we found we do not have to resolve at run-time. */
4000 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
4003 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4005 /* If we're not creating a shared library and have a symbol which is
4006 referred to by .got references, but the symbol is defined locally,
4007 (or rather, not defined by a DSO) then lose the reloc for the .got
4008 (don't allocate room for it). Likewise for relocs for something
4009 for which we create a PLT. */
4010 if (!h->root.def_dynamic
4011 || h->root.plt.refcount > 0)
4013 if (h->reg_got_refcount > 0
4014 /* The size of this section is only valid and in sync with the
4015 various reference counts if we do dynamic; don't decrement it
4017 && elf_hash_table (info)->dynamic_sections_created)
4019 bfd *dynobj = elf_hash_table (info)->dynobj;
4022 BFD_ASSERT (dynobj != NULL);
4024 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
4026 BFD_ASSERT (srelgot != NULL);
4028 srelgot->size -= sizeof (Elf32_External_Rela);
4031 /* If the locally-defined symbol isn't used by a DSO, then we don't
4032 have to export it as a dynamic symbol. This was already done for
4033 functions; doing this for all symbols would presumably not
4034 introduce new problems. Of course we don't do this if we're
4035 exporting all dynamic symbols, or all data symbols, regardless of
4036 them being referenced or not. */
4037 if (! (info->export_dynamic
4038 || (h->root.type != STT_FUNC && info->dynamic_data))
4039 && h->root.dynindx != -1
4040 && !h->root.def_dynamic
4041 && !h->root.ref_dynamic)
4043 h->root.dynindx = -1;
4044 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4045 h->root.dynstr_index);
4052 /* Reject a file depending on presence and expectation of prefixed
4053 underscores on symbols. */
4056 cris_elf_object_p (bfd *abfd)
4058 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4061 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4062 return (bfd_get_symbol_leading_char (abfd) == '_');
4064 return (bfd_get_symbol_leading_char (abfd) == 0);
4067 /* Mark presence or absence of leading underscore. Set machine type
4068 flags from mach type. */
4071 cris_elf_final_write_processing (bfd *abfd,
4072 bfd_boolean linker ATTRIBUTE_UNUSED)
4074 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4076 e_flags &= ~EF_CRIS_UNDERSCORE;
4077 if (bfd_get_symbol_leading_char (abfd) == '_')
4078 e_flags |= EF_CRIS_UNDERSCORE;
4080 switch (bfd_get_mach (abfd))
4082 case bfd_mach_cris_v0_v10:
4083 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4086 case bfd_mach_cris_v10_v32:
4087 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4090 case bfd_mach_cris_v32:
4091 e_flags |= EF_CRIS_VARIANT_V32;
4095 _bfd_abort (__FILE__, __LINE__,
4096 _("Unexpected machine number"));
4099 elf_elfheader (abfd)->e_flags = e_flags;
4102 /* Set the mach type from e_flags value. */
4105 cris_elf_set_mach_from_flags (bfd *abfd,
4106 unsigned long flags)
4108 switch (flags & EF_CRIS_VARIANT_MASK)
4110 case EF_CRIS_VARIANT_ANY_V0_V10:
4111 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4114 case EF_CRIS_VARIANT_V32:
4115 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4118 case EF_CRIS_VARIANT_COMMON_V10_V32:
4119 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4123 /* Since we don't recognize them, we obviously can't support them
4124 with this code; we'd have to require that all future handling
4125 would be optional. */
4126 bfd_set_error (bfd_error_wrong_format);
4133 /* Display the flags field. */
4136 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
4138 FILE *file = (FILE *) ptr;
4140 BFD_ASSERT (abfd != NULL && ptr != NULL);
4142 _bfd_elf_print_private_bfd_data (abfd, ptr);
4144 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4146 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4147 fprintf (file, _(" [symbols have a _ prefix]"));
4148 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4149 == EF_CRIS_VARIANT_COMMON_V10_V32)
4150 fprintf (file, _(" [v10 and v32]"));
4151 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4152 == EF_CRIS_VARIANT_V32)
4153 fprintf (file, _(" [v32]"));
4159 /* Don't mix files with and without a leading underscore. */
4162 cris_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4166 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4169 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4170 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4173 imach = bfd_get_mach (ibfd);
4175 if (! elf_flags_init (obfd))
4177 /* This happens when ld starts out with a 'blank' output file. */
4178 elf_flags_init (obfd) = TRUE;
4180 /* We ignore the linker-set mach, and instead set it according to
4181 the first input file. This would also happen if we could
4182 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4183 This allows us to keep the same linker config across
4184 cris(v0..v10) and crisv32. The drawback is that we can't force
4185 the output type, which might be a sane thing to do for a
4186 v10+v32 compatibility object. */
4187 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4191 if (bfd_get_symbol_leading_char (ibfd)
4192 != bfd_get_symbol_leading_char (obfd))
4194 (*_bfd_error_handler)
4195 (bfd_get_symbol_leading_char (ibfd) == '_'
4196 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4197 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4199 bfd_set_error (bfd_error_bad_value);
4203 omach = bfd_get_mach (obfd);
4207 /* We can get an incompatible combination only if either is
4208 bfd_mach_cris_v32, and the other one isn't compatible. */
4209 if ((imach == bfd_mach_cris_v32
4210 && omach != bfd_mach_cris_v10_v32)
4211 || (omach == bfd_mach_cris_v32
4212 && imach != bfd_mach_cris_v10_v32))
4214 (*_bfd_error_handler)
4215 ((imach == bfd_mach_cris_v32)
4216 ? _("%B contains CRIS v32 code, incompatible"
4217 " with previous objects")
4218 : _("%B contains non-CRIS-v32 code, incompatible"
4219 " with previous objects"),
4221 bfd_set_error (bfd_error_bad_value);
4225 /* We don't have to check the case where the input is compatible
4226 with v10 and v32, because the output is already known to be set
4227 to the other (compatible) mach. */
4228 if (omach == bfd_mach_cris_v10_v32
4229 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4236 /* Do side-effects of e_flags copying to obfd. */
4239 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4241 /* Call the base function. */
4242 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4245 /* If output is big-endian for some obscure reason, stop here. */
4246 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4249 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4250 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4253 /* Do what we really came here for. */
4254 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4257 static enum elf_reloc_type_class
4258 elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4259 const asection *rel_sec ATTRIBUTE_UNUSED,
4260 const Elf_Internal_Rela *rela)
4262 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4265 case R_CRIS_RELATIVE:
4266 return reloc_class_relative;
4267 case R_CRIS_JUMP_SLOT:
4268 return reloc_class_plt;
4270 return reloc_class_copy;
4272 return reloc_class_normal;
4276 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4277 two GOT entries from three types with two different sizes. We handle
4278 it as a single entry, so we can use the regular offset-calculation
4282 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4283 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4284 struct elf_link_hash_entry *hr,
4286 unsigned long symndx)
4288 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4291 /* We may have one regular GOT entry or up to two TLS GOT
4295 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4296 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4298 BFD_ASSERT (local_got_refcounts != NULL);
4300 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4302 /* We can't have a variable referred to both as a regular
4303 variable and through TLS relocs. */
4304 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4305 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4309 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4312 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4317 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4318 if (hh->reg_got_refcount > 0)
4320 /* The actual error-on-input is emitted elsewhere. */
4321 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4325 if (hh->dtp_refcount > 0)
4328 if (hh->tprel_refcount > 0)
4332 /* We're only called when h->got.refcount is non-zero, so we must
4333 have a non-zero size. */
4334 BFD_ASSERT (eltsiz != 0);
4338 #define ELF_ARCH bfd_arch_cris
4339 #define ELF_TARGET_ID CRIS_ELF_DATA
4340 #define ELF_MACHINE_CODE EM_CRIS
4341 #define ELF_MAXPAGESIZE 0x2000
4343 #define TARGET_LITTLE_SYM cris_elf32_vec
4344 #define TARGET_LITTLE_NAME "elf32-cris"
4345 #define elf_symbol_leading_char 0
4347 #define elf_info_to_howto_rel NULL
4348 #define elf_info_to_howto cris_info_to_howto_rela
4349 #define elf_backend_relocate_section cris_elf_relocate_section
4350 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4351 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
4352 #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4353 #define elf_backend_check_relocs cris_elf_check_relocs
4354 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4355 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4357 #define elf_backend_can_gc_sections 1
4358 #define elf_backend_can_refcount 1
4360 #define elf_backend_object_p cris_elf_object_p
4361 #define elf_backend_final_write_processing \
4362 cris_elf_final_write_processing
4363 #define bfd_elf32_bfd_print_private_bfd_data \
4364 cris_elf_print_private_bfd_data
4365 #define bfd_elf32_bfd_merge_private_bfd_data \
4366 cris_elf_merge_private_bfd_data
4367 #define bfd_elf32_bfd_copy_private_bfd_data \
4368 cris_elf_copy_private_bfd_data
4370 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4371 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4373 #define bfd_elf32_bfd_link_hash_table_create \
4374 elf_cris_link_hash_table_create
4375 #define elf_backend_adjust_dynamic_symbol \
4376 elf_cris_adjust_dynamic_symbol
4377 #define elf_backend_copy_indirect_symbol \
4378 elf_cris_copy_indirect_symbol
4379 #define elf_backend_size_dynamic_sections \
4380 elf_cris_size_dynamic_sections
4381 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4382 #define elf_backend_finish_dynamic_symbol \
4383 elf_cris_finish_dynamic_symbol
4384 #define elf_backend_finish_dynamic_sections \
4385 elf_cris_finish_dynamic_sections
4386 #define elf_backend_create_dynamic_sections \
4387 _bfd_elf_create_dynamic_sections
4388 #define bfd_elf32_bfd_final_link \
4389 bfd_elf_gc_common_final_link
4390 #define elf_backend_hide_symbol elf_cris_hide_symbol
4391 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4393 #define elf_backend_want_got_plt 1
4394 #define elf_backend_plt_readonly 1
4395 #define elf_backend_want_plt_sym 0
4396 #define elf_backend_got_header_size 12
4397 #define elf_backend_got_elt_size elf_cris_got_elt_size
4399 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4400 linking and libraries (if it's a win of any significance). Until then,
4401 take the easy route. */
4402 #define elf_backend_may_use_rel_p 0
4403 #define elf_backend_may_use_rela_p 1
4404 #define elf_backend_rela_normal 1
4406 #include "elf32-target.h"
4408 #undef TARGET_LITTLE_SYM
4409 #undef TARGET_LITTLE_NAME
4410 #undef elf_symbol_leading_char
4412 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4413 #define TARGET_LITTLE_NAME "elf32-us-cris"
4414 #define elf_symbol_leading_char '_'
4416 #define elf32_bed elf32_us_cris_bed
4418 #include "elf32-target.h"