1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Contributed by Axis Communications AB.
5 Written by Hans-Peter Nilsson, based on elf32-fr30.c
6 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
8 This file is part of BFD, the Binary File Descriptor library.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
30 /* Forward declarations. */
31 static reloc_howto_type * cris_reloc_type_lookup
32 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
34 static void cris_info_to_howto_rela
35 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
37 static bfd_reloc_status_type cris_elf_pcrel_reloc
38 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
40 static bfd_boolean cris_elf_grok_prstatus
41 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
43 static bfd_boolean cris_elf_grok_psinfo
44 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
46 static bfd_boolean cris_elf_relocate_section
47 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
48 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
50 static bfd_reloc_status_type cris_final_link_relocate
51 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
52 Elf_Internal_Rela *, bfd_vma));
54 static bfd_boolean cris_elf_gc_sweep_hook
55 PARAMS ((bfd *, struct bfd_link_info *, asection *,
56 const Elf_Internal_Rela *));
58 static asection * cris_elf_gc_mark_hook
59 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
60 struct elf_link_hash_entry *, Elf_Internal_Sym *));
62 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
64 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
66 static bfd_boolean cris_elf_set_mach_from_flags
67 PARAMS ((bfd *, unsigned long int));
69 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
71 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
72 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
74 struct elf_cris_link_hash_entry;
75 static bfd_boolean elf_cris_discard_excess_dso_dynamics
76 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
77 static bfd_boolean elf_cris_discard_excess_program_dynamics
78 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
79 static bfd_boolean elf_cris_adjust_gotplt_to_got
80 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
81 static bfd_boolean elf_cris_try_fold_plt_to_got
82 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
83 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
84 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
85 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
87 static bfd_boolean elf_cris_adjust_dynamic_symbol
88 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
89 static bfd_boolean cris_elf_check_relocs
90 PARAMS ((bfd *, struct bfd_link_info *, asection *,
91 const Elf_Internal_Rela *));
93 static bfd_boolean elf_cris_size_dynamic_sections
94 PARAMS ((bfd *, struct bfd_link_info *));
95 static bfd_boolean elf_cris_finish_dynamic_symbol
96 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
98 static bfd_boolean elf_cris_finish_dynamic_sections
99 PARAMS ((bfd *, struct bfd_link_info *));
100 static void elf_cris_hide_symbol
101 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
102 static enum elf_reloc_type_class elf_cris_reloc_type_class
103 PARAMS ((const Elf_Internal_Rela *));
105 static reloc_howto_type cris_elf_howto_table [] =
107 /* This reloc does nothing. */
108 HOWTO (R_CRIS_NONE, /* type */
110 2, /* size (0 = byte, 1 = short, 2 = long) */
112 FALSE, /* pc_relative */
114 complain_overflow_bitfield, /* complain_on_overflow */
115 bfd_elf_generic_reloc, /* special_function */
116 "R_CRIS_NONE", /* name */
117 FALSE, /* partial_inplace */
120 FALSE), /* pcrel_offset */
122 /* An 8 bit absolute relocation. */
123 HOWTO (R_CRIS_8, /* type */
125 0, /* size (0 = byte, 1 = short, 2 = long) */
127 FALSE, /* pc_relative */
129 complain_overflow_bitfield, /* complain_on_overflow */
130 bfd_elf_generic_reloc, /* special_function */
131 "R_CRIS_8", /* name */
132 FALSE, /* partial_inplace */
133 0x0000, /* src_mask */
134 0x00ff, /* dst_mask */
135 FALSE), /* pcrel_offset */
137 /* A 16 bit absolute relocation. */
138 HOWTO (R_CRIS_16, /* type */
140 1, /* size (0 = byte, 1 = short, 2 = long) */
142 FALSE, /* pc_relative */
144 complain_overflow_bitfield, /* complain_on_overflow */
145 bfd_elf_generic_reloc, /* special_function */
146 "R_CRIS_16", /* name */
147 FALSE, /* partial_inplace */
148 0x00000000, /* src_mask */
149 0x0000ffff, /* dst_mask */
150 FALSE), /* pcrel_offset */
152 /* A 32 bit absolute relocation. */
153 HOWTO (R_CRIS_32, /* type */
155 2, /* size (0 = byte, 1 = short, 2 = long) */
157 FALSE, /* pc_relative */
159 complain_overflow_bitfield, /* complain_on_overflow */
160 bfd_elf_generic_reloc, /* special_function */
161 "R_CRIS_32", /* name */
162 FALSE, /* partial_inplace */
163 0x00000000, /* src_mask */
164 0xffffffff, /* dst_mask */
165 FALSE), /* pcrel_offset */
167 /* An 8 bit PC-relative relocation. */
168 HOWTO (R_CRIS_8_PCREL, /* type */
170 0, /* size (0 = byte, 1 = short, 2 = long) */
172 TRUE, /* pc_relative */
174 complain_overflow_bitfield, /* complain_on_overflow */
175 cris_elf_pcrel_reloc, /* special_function */
176 "R_CRIS_8_PCREL", /* name */
177 FALSE, /* partial_inplace */
178 0x0000, /* src_mask */
179 0x00ff, /* dst_mask */
180 TRUE), /* pcrel_offset */
182 /* A 16 bit PC-relative relocation. */
183 HOWTO (R_CRIS_16_PCREL, /* type */
185 1, /* size (0 = byte, 1 = short, 2 = long) */
187 TRUE, /* pc_relative */
189 complain_overflow_bitfield, /* complain_on_overflow */
190 cris_elf_pcrel_reloc, /* special_function */
191 "R_CRIS_16_PCREL", /* name */
192 FALSE, /* partial_inplace */
193 0x00000000, /* src_mask */
194 0x0000ffff, /* dst_mask */
195 TRUE), /* pcrel_offset */
197 /* A 32 bit PC-relative relocation. */
198 HOWTO (R_CRIS_32_PCREL, /* type */
200 2, /* size (0 = byte, 1 = short, 2 = long) */
202 TRUE, /* pc_relative */
204 complain_overflow_bitfield, /* complain_on_overflow */
205 cris_elf_pcrel_reloc, /* special_function */
206 "R_CRIS_32_PCREL", /* name */
207 FALSE, /* partial_inplace */
208 0x00000000, /* src_mask */
209 0xffffffff, /* dst_mask */
210 TRUE), /* pcrel_offset */
212 /* GNU extension to record C++ vtable hierarchy. */
213 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
215 2, /* size (0 = byte, 1 = short, 2 = long) */
217 FALSE, /* pc_relative */
219 complain_overflow_dont, /* complain_on_overflow */
220 NULL, /* special_function */
221 "R_CRIS_GNU_VTINHERIT", /* name */
222 FALSE, /* partial_inplace */
225 FALSE), /* pcrel_offset */
227 /* GNU extension to record C++ vtable member usage. */
228 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
230 2, /* size (0 = byte, 1 = short, 2 = long) */
232 FALSE, /* pc_relative */
234 complain_overflow_dont, /* complain_on_overflow */
235 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
236 "R_CRIS_GNU_VTENTRY", /* name */
237 FALSE, /* partial_inplace */
240 FALSE), /* pcrel_offset */
242 /* This is used only by the dynamic linker. The symbol should exist
243 both in the object being run and in some shared library. The
244 dynamic linker copies the data addressed by the symbol from the
245 shared library into the object, because the object being
246 run has to have the data at some particular address. */
247 HOWTO (R_CRIS_COPY, /* type */
249 2, /* 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_COPY", /* name */
256 FALSE, /* partial_inplace */
259 FALSE), /* pcrel_offset */
261 /* Like R_CRIS_32, but used when setting global offset table entries. */
262 HOWTO (R_CRIS_GLOB_DAT, /* type */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
266 FALSE, /* pc_relative */
268 complain_overflow_bitfield, /* complain_on_overflow */
269 bfd_elf_generic_reloc, /* special_function */
270 "R_CRIS_GLOB_DAT", /* name */
271 FALSE, /* partial_inplace */
273 0xffffffff, /* dst_mask */
274 FALSE), /* pcrel_offset */
276 /* Marks a procedure linkage table entry for a symbol. */
277 HOWTO (R_CRIS_JUMP_SLOT, /* type */
279 2, /* 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_JUMP_SLOT", /* name */
286 FALSE, /* partial_inplace */
289 FALSE), /* pcrel_offset */
291 /* Used only by the dynamic linker. When the object is run, this
292 longword is set to the load address of the object, plus the
294 HOWTO (R_CRIS_RELATIVE, /* type */
296 2, /* size (0 = byte, 1 = short, 2 = long) */
298 FALSE, /* pc_relative */
300 complain_overflow_bitfield, /* complain_on_overflow */
301 bfd_elf_generic_reloc, /* special_function */
302 "R_CRIS_RELATIVE", /* name */
303 FALSE, /* partial_inplace */
305 0xffffffff, /* dst_mask */
306 FALSE), /* pcrel_offset */
308 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
309 HOWTO (R_CRIS_16_GOT, /* type */
311 1, /* size (0 = byte, 1 = short, 2 = long) */
313 FALSE, /* pc_relative */
315 complain_overflow_bitfield, /* complain_on_overflow */
316 bfd_elf_generic_reloc, /* special_function */
317 "R_CRIS_16_GOT", /* name */
318 FALSE, /* partial_inplace */
320 0xffff, /* dst_mask */
321 FALSE), /* pcrel_offset */
323 HOWTO (R_CRIS_32_GOT, /* 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_GOT", /* name */
332 FALSE, /* partial_inplace */
334 0xffffffff, /* dst_mask */
335 FALSE), /* pcrel_offset */
337 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
338 the GOT table for the symbol. */
339 HOWTO (R_CRIS_16_GOTPLT, /* type */
341 1, /* size (0 = byte, 1 = short, 2 = long) */
343 FALSE, /* pc_relative */
345 complain_overflow_bitfield, /* complain_on_overflow */
346 bfd_elf_generic_reloc, /* special_function */
347 "R_CRIS_16_GOTPLT", /* name */
348 FALSE, /* partial_inplace */
350 0xffff, /* dst_mask */
351 FALSE), /* pcrel_offset */
353 HOWTO (R_CRIS_32_GOTPLT, /* type */
355 2, /* size (0 = byte, 1 = short, 2 = long) */
357 FALSE, /* pc_relative */
359 complain_overflow_bitfield, /* complain_on_overflow */
360 bfd_elf_generic_reloc, /* special_function */
361 "R_CRIS_32_GOTPLT", /* name */
362 FALSE, /* partial_inplace */
364 0xffffffff, /* dst_mask */
365 FALSE), /* pcrel_offset */
367 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
369 HOWTO (R_CRIS_32_GOTREL, /* type */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
373 FALSE, /* pc_relative */
375 complain_overflow_bitfield, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_CRIS_32_GOTREL", /* name */
378 FALSE, /* partial_inplace */
380 0xffffffff, /* dst_mask */
381 FALSE), /* pcrel_offset */
383 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
384 to create PLT entry for symbol. */
385 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
387 2, /* size (0 = byte, 1 = short, 2 = long) */
389 FALSE, /* pc_relative */
391 complain_overflow_bitfield, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_CRIS_32_PLT_GOTREL", /* name */
394 FALSE, /* partial_inplace */
396 0xffffffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
399 /* A 32-bit offset from PC (location after the relocation) + addend to
400 entry for this symbol in PLT and request to create PLT entry for
402 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
406 TRUE, /* pc_relative */
408 complain_overflow_bitfield, /* complain_on_overflow */
409 cris_elf_pcrel_reloc, /* special_function */
410 "R_CRIS_32_PLT_PCREL", /* name */
411 FALSE, /* partial_inplace */
413 0xffffffff, /* dst_mask */
414 TRUE) /* pcrel_offset */
417 /* Map BFD reloc types to CRIS ELF reloc types. */
419 struct cris_reloc_map
421 bfd_reloc_code_real_type bfd_reloc_val;
422 unsigned int cris_reloc_val;
425 static const struct cris_reloc_map cris_reloc_map [] =
427 { BFD_RELOC_NONE, R_CRIS_NONE },
428 { BFD_RELOC_8, R_CRIS_8 },
429 { BFD_RELOC_16, R_CRIS_16 },
430 { BFD_RELOC_32, R_CRIS_32 },
431 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
432 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
433 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
434 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
435 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
436 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
437 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
438 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
439 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
440 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
441 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
442 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
443 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
444 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
445 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
446 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }
449 static reloc_howto_type *
450 cris_reloc_type_lookup (abfd, code)
451 bfd * abfd ATTRIBUTE_UNUSED;
452 bfd_reloc_code_real_type code;
456 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
457 if (cris_reloc_map [i].bfd_reloc_val == code)
458 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
463 /* Set the howto pointer for an CRIS ELF reloc. */
466 cris_info_to_howto_rela (abfd, cache_ptr, dst)
467 bfd * abfd ATTRIBUTE_UNUSED;
469 Elf_Internal_Rela * dst;
473 r_type = ELF32_R_TYPE (dst->r_info);
474 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
475 cache_ptr->howto = & cris_elf_howto_table [r_type];
478 bfd_reloc_status_type
479 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
480 output_bfd, error_message)
481 bfd *abfd ATTRIBUTE_UNUSED;
482 arelent *reloc_entry;
484 PTR data ATTRIBUTE_UNUSED;
485 asection *input_section;
487 char **error_message ATTRIBUTE_UNUSED;
489 /* By default (using only bfd_elf_generic_reloc when linking to
490 non-ELF formats) PC-relative relocs are relative to the beginning
491 of the reloc. CRIS PC-relative relocs are relative to the position
492 *after* the reloc because that's what pre-CRISv32 PC points to
493 after reading an insn field with that reloc. (For CRISv32, PC is
494 actually relative to the start of the insn, but we keep the old
495 definition.) Still, we use as much generic machinery as we can.
497 Only adjust when doing a final link. */
498 if (output_bfd == (bfd *) NULL)
499 reloc_entry->addend -= 1 << reloc_entry->howto->size;
502 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
503 input_section, output_bfd, error_message);
506 /* Support for core dump NOTE sections.
507 The slightly unintuitive code layout is an attempt to keep at least
508 some similarities with other ports, hoping to simplify general
509 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
512 cris_elf_grok_prstatus (abfd, note)
514 Elf_Internal_Note *note;
519 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
520 switch (note->descsz)
525 case 202: /* Linux/CRISv32 */
527 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
530 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
539 switch (note->descsz)
544 case 214: /* Linux/CRIS */
546 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
549 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
558 /* Make a ".reg/999" section. */
559 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
560 size, note->descpos + offset);
564 cris_elf_grok_psinfo (abfd, note)
566 Elf_Internal_Note *note;
568 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
569 switch (note->descsz)
574 case 124: /* Linux/CRISv32 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 switch (note->descsz)
586 case 124: /* Linux/CRIS elf_prpsinfo */
587 elf_tdata (abfd)->core_program
588 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
589 elf_tdata (abfd)->core_command
590 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
593 /* Note that for some reason, a spurious space is tacked
594 onto the end of the args in some (at least one anyway)
595 implementations, so strip it off if it exists. */
598 char *command = elf_tdata (abfd)->core_command;
599 int n = strlen (command);
601 if (0 < n && command[n - 1] == ' ')
602 command[n - 1] = '\0';
608 /* The name of the dynamic interpreter. This is put in the .interp
611 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
613 /* The size in bytes of an entry in the procedure linkage table. */
615 #define PLT_ENTRY_SIZE 20
616 #define PLT_ENTRY_SIZE_V32 26
618 /* The first entry in an absolute procedure linkage table looks like this. */
620 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
623 0x7e, 0x7e, /* push mof. */
624 0x7f, 0x0d, /* (dip [pc+]) */
625 0, 0, 0, 0, /* Replaced with address of .got + 4. */
626 0x30, 0x7a, /* move [...],mof */
627 0x7f, 0x0d, /* (dip [pc+]) */
628 0, 0, 0, 0, /* Replaced with address of .got + 8. */
629 0x30, 0x09 /* jump [...] */
632 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
634 0x84, 0xe2, /* subq 4,$sp */
635 0x6f, 0xfe, /* move.d 0,$acr */
636 0, 0, 0, 0, /* Replaced by address of .got + 4. */
637 0x7e, 0x7a, /* move $mof,[$sp] */
638 0x3f, 0x7a, /* move [$acr],$mof */
639 0x04, 0xf2, /* addq 4,acr */
640 0x6f, 0xfa, /* move.d [$acr],$acr */
641 0xbf, 0x09, /* jump $acr */
642 0xb0, 0x05, /* nop */
643 0, 0 /* Pad out to 26 bytes. */
646 /* Subsequent entries in an absolute procedure linkage table look like
649 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
651 0x7f, 0x0d, /* (dip [pc+]) */
652 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
653 0x30, 0x09, /* jump [...] */
654 0x3f, 0x7e, /* move [pc+],mof */
655 0, 0, 0, 0, /* Replaced with offset into relocation table. */
656 0x2f, 0xfe, /* add.d [pc+],pc */
658 0xff, 0xff /* Replaced with offset to start of .plt. */
661 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
663 0x6f, 0xfe, /* move.d 0,$acr */
664 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
665 0x6f, 0xfa, /* move.d [$acr],$acr */
666 0xbf, 0x09, /* jump $acr */
667 0xb0, 0x05, /* nop */
668 0x3f, 0x7e, /* move 0,mof */
669 0, 0, 0, 0, /* Replaced with offset into relocation table. */
670 0xbf, 0x0e, /* ba start_of_plt0_entry */
671 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
675 /* The first entry in a PIC procedure linkage table looks like this. */
677 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
679 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
680 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
681 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
682 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
685 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
687 0x84, 0xe2, /* subq 4,$sp */
688 0x04, 0x01, /* addoq 4,$r0,$acr */
689 0x7e, 0x7a, /* move $mof,[$sp] */
690 0x3f, 0x7a, /* move [$acr],$mof */
691 0x04, 0xf2, /* addq 4,$acr */
692 0x6f, 0xfa, /* move.d [$acr],$acr */
693 0xbf, 0x09, /* jump $acr */
694 0xb0, 0x05, /* nop */
695 0, 0, /* Pad out to 26 bytes. */
700 /* Subsequent entries in a PIC procedure linkage table look like this. */
702 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
704 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
705 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
706 0x30, 0x09, /* jump [...] */
707 0x3f, 0x7e, /* move [pc+],mof */
708 0, 0, 0, 0, /* Replaced with offset into relocation table. */
709 0x2f, 0xfe, /* add.d [pc+],pc */
710 0xec, 0xff, /* Replaced with offset to start of .plt. */
714 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
716 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
717 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
718 0x6f, 0xfa, /* move.d [$acr],$acr */
719 0xbf, 0x09, /* jump $acr */
720 0xb0, 0x05, /* nop */
721 0x3f, 0x7e, /* move relocoffs,$mof */
722 0, 0, 0, 0, /* Replaced with offset into relocation table. */
723 0xbf, 0x0e, /* ba start_of_plt */
724 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
728 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
729 (and most other PIC/shlib stuff). Check that we don't drift away
732 The CRIS linker, like the m68k and i386 linkers (and probably the rest
733 too) needs to keep track of the number of relocs that it decides to
734 copy in check_relocs for each symbol. This is so that it can discard
735 PC relative relocs if it doesn't need them when linking with
736 -Bsymbolic. We store the information in a field extending the regular
737 ELF linker hash table. */
739 /* This structure keeps track of the number of PC relative relocs we have
740 copied for a given symbol. */
742 struct elf_cris_pcrel_relocs_copied
745 struct elf_cris_pcrel_relocs_copied *next;
746 /* A section in dynobj. */
748 /* Number of relocs copied in this section. */
752 /* CRIS ELF linker hash entry. */
754 struct elf_cris_link_hash_entry
756 struct elf_link_hash_entry root;
758 /* Number of PC relative relocs copied for this symbol. */
759 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
761 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
762 both a general GOT and a PLT-specific GOT entry for the same symbol,
763 when it is referenced both as a function and as a function pointer.
765 Number of GOTPLT references for a function. */
766 bfd_signed_vma gotplt_refcount;
768 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
769 (zero is never used as an index). FIXME: We should be able to fold
770 this with gotplt_refcount in a union, like the got and plt unions in
771 elf_link_hash_entry. */
772 bfd_size_type gotplt_offset;
775 /* CRIS ELF linker hash table. */
777 struct elf_cris_link_hash_table
779 struct elf_link_hash_table root;
781 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
782 since we try and avoid creating GOTPLT:s when there's already a GOT.
783 Instead, we keep and update the next available index here. */
784 bfd_size_type next_gotplt_entry;
787 /* Traverse a CRIS ELF linker hash table. */
789 #define elf_cris_link_hash_traverse(table, func, info) \
790 (elf_link_hash_traverse \
792 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
795 /* Get the CRIS ELF linker hash table from a link_info structure. */
797 #define elf_cris_hash_table(p) \
798 ((struct elf_cris_link_hash_table *) (p)->hash)
800 /* Create an entry in a CRIS ELF linker hash table. */
802 static struct bfd_hash_entry *
803 elf_cris_link_hash_newfunc (entry, table, string)
804 struct bfd_hash_entry *entry;
805 struct bfd_hash_table *table;
808 struct elf_cris_link_hash_entry *ret =
809 (struct elf_cris_link_hash_entry *) entry;
811 /* Allocate the structure if it has not already been allocated by a
813 if (ret == (struct elf_cris_link_hash_entry *) NULL)
814 ret = ((struct elf_cris_link_hash_entry *)
815 bfd_hash_allocate (table,
816 sizeof (struct elf_cris_link_hash_entry)));
817 if (ret == (struct elf_cris_link_hash_entry *) NULL)
818 return (struct bfd_hash_entry *) ret;
820 /* Call the allocation method of the superclass. */
821 ret = ((struct elf_cris_link_hash_entry *)
822 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
824 if (ret != (struct elf_cris_link_hash_entry *) NULL)
826 ret->pcrel_relocs_copied = NULL;
827 ret->gotplt_refcount = 0;
828 ret->gotplt_offset = 0;
831 return (struct bfd_hash_entry *) ret;
834 /* Create a CRIS ELF linker hash table. */
836 static struct bfd_link_hash_table *
837 elf_cris_link_hash_table_create (abfd)
840 struct elf_cris_link_hash_table *ret;
841 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
843 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
844 if (ret == (struct elf_cris_link_hash_table *) NULL)
847 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
848 elf_cris_link_hash_newfunc))
854 /* Initialize to skip over the first three entries in the gotplt; they
855 are used for run-time symbol evaluation. */
856 ret->next_gotplt_entry = 12;
858 return &ret->root.root;
861 /* Perform a single relocation. By default we use the standard BFD
862 routines, with a few tweaks. */
864 static bfd_reloc_status_type
865 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
867 reloc_howto_type * howto;
869 asection * input_section;
871 Elf_Internal_Rela * rel;
874 bfd_reloc_status_type r;
876 /* PC-relative relocations are relative to the position *after*
877 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
878 not a single byte, since PC must be 16-bit-aligned. */
879 switch (ELF32_R_TYPE (rel->r_info))
881 /* Check that the 16-bit GOT relocs are positive. */
882 case R_CRIS_16_GOTPLT:
884 if ((bfd_signed_vma) relocation < 0)
885 return bfd_reloc_overflow;
888 case R_CRIS_32_PLT_PCREL:
889 case R_CRIS_32_PCREL:
893 case R_CRIS_16_PCREL:
901 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
902 contents, rel->r_offset,
903 relocation, rel->r_addend);
907 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
908 copied, for further comments. */
911 cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
912 contents, relocs, local_syms, local_sections)
913 bfd *output_bfd ATTRIBUTE_UNUSED;
914 struct bfd_link_info *info;
916 asection *input_section;
918 Elf_Internal_Rela *relocs;
919 Elf_Internal_Sym *local_syms;
920 asection **local_sections;
923 Elf_Internal_Shdr *symtab_hdr;
924 struct elf_link_hash_entry **sym_hashes;
925 bfd_vma *local_got_offsets;
929 Elf_Internal_Rela *rel;
930 Elf_Internal_Rela *relend;
932 if (info->relocatable)
935 dynobj = elf_hash_table (info)->dynobj;
936 local_got_offsets = elf_local_got_offsets (input_bfd);
937 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
938 sym_hashes = elf_sym_hashes (input_bfd);
939 relend = relocs + input_section->reloc_count;
947 splt = bfd_get_section_by_name (dynobj, ".plt");
948 sgot = bfd_get_section_by_name (dynobj, ".got");
951 for (rel = relocs; rel < relend; rel ++)
953 reloc_howto_type *howto;
954 unsigned long r_symndx;
955 Elf_Internal_Sym *sym;
957 struct elf_link_hash_entry *h;
959 bfd_reloc_status_type r;
960 const char *symname = NULL;
963 r_type = ELF32_R_TYPE (rel->r_info);
965 if ( r_type == R_CRIS_GNU_VTINHERIT
966 || r_type == R_CRIS_GNU_VTENTRY)
969 /* This is a final link. */
970 r_symndx = ELF32_R_SYM (rel->r_info);
971 howto = cris_elf_howto_table + r_type;
976 if (r_symndx < symtab_hdr->sh_info)
978 sym = local_syms + r_symndx;
979 sec = local_sections [r_symndx];
980 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
982 symname = (bfd_elf_string_from_elf_section
983 (input_bfd, symtab_hdr->sh_link, sym->st_name));
985 symname = bfd_section_name (input_bfd, sec);
990 bfd_boolean unresolved_reloc;
992 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
993 r_symndx, symtab_hdr, sym_hashes,
995 unresolved_reloc, warned);
998 /* Perhaps we should detect the cases that
999 sec->output_section is expected to be NULL like i386 and
1000 m68k, but apparently (and according to elfxx-ia64.c) all
1001 valid cases are where the symbol is defined in a shared
1002 object which we link dynamically against. This includes
1003 PLT relocs for which we've created a PLT entry and other
1004 relocs for which we're prepared to create dynamic
1007 For now, new situations cause us to just err when
1008 sec->output_offset is NULL but the object with the symbol
1009 is *not* dynamically linked against. Thus this will
1010 automatically remind us so we can see if there are other
1011 valid cases we need to revisit. */
1012 && (sec->owner->flags & DYNAMIC) != 0)
1015 else if (h->root.type == bfd_link_hash_defined
1016 || h->root.type == bfd_link_hash_defweak)
1018 /* Here follow the cases where the relocation value must
1019 be zero (or when further handling is simplified when
1020 zero). I can't claim to understand the various
1021 conditions and they weren't described in the files
1022 where I copied them from (elf32-m68k.c and
1023 elf32-i386.c), but let's mention examples of where
1024 they happen. FIXME: Perhaps define and use a
1025 dynamic_symbol_p function like ia64.
1027 - When creating a shared library, we can have an
1028 ordinary relocation for a symbol defined in a shared
1029 library (perhaps the one we create). We then make
1030 the relocation value zero, as the value seen now will
1031 be added into the relocation addend in this shared
1032 library, but must be handled only at dynamic-link
1033 time. FIXME: Not sure this example covers the
1034 h->elf_link_hash_flags test, though it's there in
1037 && ((! info->symbolic && h->dynindx != -1)
1039 && (input_section->flags & SEC_ALLOC) != 0
1040 && (r_type == R_CRIS_8
1041 || r_type == R_CRIS_16
1042 || r_type == R_CRIS_32
1043 || r_type == R_CRIS_8_PCREL
1044 || r_type == R_CRIS_16_PCREL
1045 || r_type == R_CRIS_32_PCREL))
1047 else if (unresolved_reloc)
1050 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1053 cris_elf_howto_table[r_type].name,
1055 bfd_set_error (bfd_error_bad_value);
1063 case R_CRIS_16_GOTPLT:
1064 case R_CRIS_32_GOTPLT:
1065 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1066 but we require a PLT, and the PLT handling will take care of
1067 filling in the PLT-specific GOT entry. For the GOT offset,
1068 calculate it as we do when filling it in for the .got.plt
1069 section. If we don't have a PLT, punt to GOT handling. */
1071 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1074 = bfd_get_section_by_name (dynobj, ".got.plt");
1077 BFD_ASSERT (h->dynindx != -1);
1078 BFD_ASSERT (sgotplt != NULL);
1081 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1083 relocation = got_offset;
1087 /* We didn't make a PLT entry for this symbol. Maybe everything is
1088 folded into the GOT. Other than folding, this happens when
1089 statically linking PIC code, or when using -Bsymbolic. Check
1090 that we instead have a GOT entry as done for us by
1091 elf_cris_adjust_dynamic_symbol, and drop through into the
1092 ordinary GOT cases. This must not happen for the
1093 executable, because any reference it does to a function
1094 that is satisfied by a DSO must generate a PLT. We assume
1095 these call-specific relocs don't address non-functions. */
1097 && (h->got.offset == (bfd_vma) -1
1101 && h->root.type == bfd_link_hash_undefweak)))))
1103 (*_bfd_error_handler)
1104 ((h->got.offset == (bfd_vma) -1)
1105 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1106 " against symbol `%s'")
1107 : _("%B, section %A: No PLT for relocation %s"
1108 " against symbol `%s'"),
1111 cris_elf_howto_table[r_type].name,
1112 (symname != NULL && symname[0] != '\0'
1113 ? symname : _("[whose name is lost]")));
1115 /* FIXME: Perhaps blaming input is not the right thing to
1116 do; this is probably an internal error. But it is true
1117 that we didn't like that particular input. */
1118 bfd_set_error (bfd_error_bad_value);
1123 /* The size of the actual relocation is not used here; we only
1124 fill in the GOT table here. */
1130 /* Note that despite using RELA relocations, the .got contents
1131 is always filled in with the link-relative relocation
1132 value; the addend. */
1136 off = h->got.offset;
1137 BFD_ASSERT (off != (bfd_vma) -1);
1139 if (!elf_hash_table (info)->dynamic_sections_created
1142 || h->type == STT_FUNC
1145 && (info->symbolic || h->dynindx == -1)
1148 /* This wasn't checked above for ! info->shared, but
1149 must hold there if we get here; the symbol must
1150 be defined in the regular program or be undefweak
1151 or be a function or otherwise need a PLT. */
1152 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1155 || h->type == STT_FUNC
1157 || h->root.type == bfd_link_hash_undefweak);
1159 /* This is actually a static link, or it is a
1160 -Bsymbolic link and the symbol is defined locally,
1161 or is undefweak, or the symbol was forced to be
1162 local because of a version file, or we're not
1163 creating a dynamic object. We must initialize this
1164 entry in the global offset table. Since the offset
1165 must always be a multiple of 4, we use the least
1166 significant bit to record whether we have
1167 initialized it already.
1169 If this GOT entry should be runtime-initialized, we
1170 will create a .rela.got relocation entry to
1171 initialize the value. This is done in the
1172 finish_dynamic_symbol routine. */
1177 bfd_put_32 (output_bfd, relocation,
1178 sgot->contents + off);
1185 BFD_ASSERT (local_got_offsets != NULL
1186 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1188 off = local_got_offsets[r_symndx];
1190 /* The offset must always be a multiple of 4. We use
1191 the least significant bit to record whether we have
1192 already generated the necessary reloc. */
1197 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1202 Elf_Internal_Rela outrel;
1205 s = bfd_get_section_by_name (dynobj, ".rela.got");
1206 BFD_ASSERT (s != NULL);
1208 outrel.r_offset = (sgot->output_section->vma
1209 + sgot->output_offset
1211 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1212 outrel.r_addend = relocation;
1214 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1215 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1218 local_got_offsets[r_symndx] |= 1;
1222 relocation = sgot->output_offset + off;
1223 if (rel->r_addend != 0)
1225 /* We can't do anything for a relocation which is against
1226 a symbol *plus offset*. GOT holds relocations for
1227 symbols. Make this an error; the compiler isn't
1228 allowed to pass us these kinds of things. */
1230 (*_bfd_error_handler)
1231 (_("%B, section %A: relocation %s with non-zero addend %d"
1232 " against local symbol"),
1235 cris_elf_howto_table[r_type].name,
1238 (*_bfd_error_handler)
1239 (_("%B, section %A: relocation %s with non-zero addend %d"
1240 " against symbol `%s'"),
1243 cris_elf_howto_table[r_type].name,
1245 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1247 bfd_set_error (bfd_error_bad_value);
1253 case R_CRIS_32_GOTREL:
1254 /* This relocation must only be performed against local symbols.
1255 It's also ok when we link a program and the symbol is either
1256 defined in an ordinary (non-DSO) object or is undefined weak. */
1258 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1262 && h->root.type == bfd_link_hash_undefweak))))
1264 (*_bfd_error_handler)
1265 (_("%B, section %A: relocation %s is"
1266 " not allowed for global symbol: `%s'"),
1269 cris_elf_howto_table[r_type].name,
1271 bfd_set_error (bfd_error_bad_value);
1275 /* This can happen if we get a link error with the input ELF
1276 variant mismatching the output variant. Emit an error so
1277 it's noticed if it happens elsewhere. */
1280 (*_bfd_error_handler)
1281 (_("%B, section %A: relocation %s with no GOT created"),
1284 cris_elf_howto_table[r_type].name);
1285 bfd_set_error (bfd_error_bad_value);
1289 /* This relocation is like a PC-relative one, except the
1290 reference point is the location of GOT. Note that
1291 sgot->output_offset is not involved in this calculation. We
1292 always want the start of entire .got section, not the
1293 position after the reserved header. */
1294 relocation -= sgot->output_section->vma;
1297 case R_CRIS_32_PLT_PCREL:
1298 /* Relocation is to the entry for this symbol in the
1299 procedure linkage table. */
1301 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1302 without using the procedure linkage table. */
1303 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1306 if (h->plt.offset == (bfd_vma) -1
1309 /* We didn't make a PLT entry for this symbol. This
1310 happens when statically linking PIC code, or when
1311 using -Bsymbolic. */
1315 relocation = (splt->output_section->vma
1316 + splt->output_offset
1320 case R_CRIS_32_PLT_GOTREL:
1321 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1322 start of the .got section. See also comment at
1324 relocation -= sgot->output_section->vma;
1326 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1327 without using the procedure linkage table. */
1328 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1331 if (h->plt.offset == (bfd_vma) -1
1334 /* We didn't make a PLT entry for this symbol. This
1335 happens when statically linking PIC code, or when
1336 using -Bsymbolic. */
1340 relocation = (splt->output_section->vma
1341 + splt->output_offset
1343 - sgot->output_section->vma);
1346 case R_CRIS_8_PCREL:
1347 case R_CRIS_16_PCREL:
1348 case R_CRIS_32_PCREL:
1349 /* If the symbol was local, we need no shlib-specific handling. */
1350 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1359 && (input_section->flags & SEC_ALLOC) != 0
1360 && ((r_type != R_CRIS_8_PCREL
1361 && r_type != R_CRIS_16_PCREL
1362 && r_type != R_CRIS_32_PCREL)
1364 || !h->def_regular)))
1366 Elf_Internal_Rela outrel;
1368 bfd_boolean skip, relocate;
1370 /* When generating a shared object, these relocations
1371 are copied into the output file to be resolved at run
1378 name = (bfd_elf_string_from_elf_section
1380 elf_elfheader (input_bfd)->e_shstrndx,
1381 elf_section_data (input_section)->rel_hdr.sh_name));
1385 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1386 && strcmp (bfd_get_section_name (input_bfd,
1390 sreloc = bfd_get_section_by_name (dynobj, name);
1392 /* That section should have been created in
1393 cris_elf_check_relocs, but that function will not be
1394 called for objects which fail in
1395 cris_elf_merge_private_bfd_data. */
1398 (*_bfd_error_handler)
1399 (_("%B: Internal inconsistency; no relocation section %s"),
1403 bfd_set_error (bfd_error_bad_value);
1412 _bfd_elf_section_offset (output_bfd, info, input_section,
1414 if (outrel.r_offset == (bfd_vma) -1)
1416 else if (outrel.r_offset == (bfd_vma) -2)
1417 skip = TRUE, relocate = TRUE;
1418 outrel.r_offset += (input_section->output_section->vma
1419 + input_section->output_offset);
1422 memset (&outrel, 0, sizeof outrel);
1423 /* h->dynindx may be -1 if the symbol was marked to
1426 && ((! info->symbolic && h->dynindx != -1)
1427 || !h->def_regular))
1429 BFD_ASSERT (h->dynindx != -1);
1430 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1431 outrel.r_addend = relocation + rel->r_addend;
1435 if (r_type == R_CRIS_32)
1438 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1439 outrel.r_addend = relocation + rel->r_addend;
1445 if (bfd_is_abs_section (sec))
1447 else if (sec == NULL || sec->owner == NULL)
1449 bfd_set_error (bfd_error_bad_value);
1456 osec = sec->output_section;
1457 indx = elf_section_data (osec)->dynindx;
1458 BFD_ASSERT (indx > 0);
1461 outrel.r_info = ELF32_R_INFO (indx, r_type);
1462 outrel.r_addend = relocation + rel->r_addend;
1466 loc = sreloc->contents;
1467 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1468 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1470 /* This reloc will be computed at runtime, so there's no
1471 need to do anything now, except for R_CRIS_32 relocations
1472 that have been turned into R_CRIS_RELATIVE. */
1480 r = cris_final_link_relocate (howto, input_bfd, input_section,
1481 contents, rel, relocation);
1483 if (r != bfd_reloc_ok)
1485 const char * msg = (const char *) NULL;
1489 case bfd_reloc_overflow:
1490 r = info->callbacks->reloc_overflow
1491 (info, (h ? &h->root : NULL), symname, howto->name,
1492 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1495 case bfd_reloc_undefined:
1496 r = info->callbacks->undefined_symbol
1497 (info, symname, input_bfd, input_section, rel->r_offset,
1501 case bfd_reloc_outofrange:
1502 msg = _("internal error: out of range error");
1505 case bfd_reloc_notsupported:
1506 msg = _("internal error: unsupported relocation error");
1509 case bfd_reloc_dangerous:
1510 msg = _("internal error: dangerous relocation");
1514 msg = _("internal error: unknown error");
1519 r = info->callbacks->warning
1520 (info, msg, symname, input_bfd, input_section, rel->r_offset);
1530 /* Finish up dynamic symbol handling. We set the contents of various
1531 dynamic sections here. */
1534 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
1536 struct bfd_link_info *info;
1537 struct elf_link_hash_entry *h;
1538 Elf_Internal_Sym *sym;
1542 /* Where in the plt entry to put values. */
1543 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
1545 /* What offset to add to the distance to the first PLT entry for the
1546 value at plt_off3. */
1547 int plt_off3_value_bias = 4;
1549 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
1550 for PIC and non-PIC for v32 and pre-v32). */
1551 int plt_stub_offset = 8;
1552 int plt_entry_size = PLT_ENTRY_SIZE;
1553 const bfd_byte *plt_entry = elf_cris_plt_entry;
1554 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
1556 /* Adjust the various PLT entry offsets. */
1557 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1561 plt_off3_value_bias = -2;
1562 plt_stub_offset = 12;
1563 plt_entry_size = PLT_ENTRY_SIZE_V32;
1564 plt_entry = elf_cris_plt_entry_v32;
1565 plt_pic_entry = elf_cris_pic_plt_entry_v32;
1568 dynobj = elf_hash_table (info)->dynobj;
1570 if (h->plt.offset != (bfd_vma) -1)
1578 bfd_vma gotplt_offset
1579 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1580 Elf_Internal_Rela rela;
1582 bfd_boolean has_gotplt = gotplt_offset != 0;
1584 /* Get the index in the procedure linkage table which
1585 corresponds to this symbol. This is the index of this symbol
1586 in all the symbols for which we are making plt entries. The
1587 first entry in the procedure linkage table is reserved. */
1588 /* We have to count backwards here, and the result is only valid as
1589 an index into .got.plt and its relocations. FIXME: Constants... */
1590 bfd_vma gotplt_index = gotplt_offset/4 - 3;
1592 /* Get the offset into the .got table of the entry that corresponds
1593 to this function. Note that we embed knowledge that "incoming"
1594 .got goes after .got.plt in the output without padding (pointer
1595 aligned). However, that knowledge is present in several other
1600 : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
1602 /* This symbol has an entry in the procedure linkage table. Set it
1605 BFD_ASSERT (h->dynindx != -1);
1607 splt = bfd_get_section_by_name (dynobj, ".plt");
1608 sgot = bfd_get_section_by_name (dynobj, ".got");
1609 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1610 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1611 BFD_ASSERT (splt != NULL && sgotplt != NULL
1612 && (! has_gotplt || srela != NULL));
1614 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
1616 /* Fill in the entry in the procedure linkage table. */
1619 memcpy (splt->contents + h->plt.offset, plt_entry,
1622 /* We need to enter the absolute address of the GOT entry here. */
1623 bfd_put_32 (output_bfd, got_base + got_offset,
1624 splt->contents + h->plt.offset + plt_off1);
1628 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
1630 bfd_put_32 (output_bfd, got_offset,
1631 splt->contents + h->plt.offset + plt_off1);
1634 /* Fill in the plt entry and make a relocation, if this is a "real"
1638 /* Fill in the offset to the reloc table. */
1639 bfd_put_32 (output_bfd,
1640 gotplt_index * sizeof (Elf32_External_Rela),
1641 splt->contents + h->plt.offset + plt_off2);
1643 /* Fill in the offset to the first PLT entry, where to "jump". */
1644 bfd_put_32 (output_bfd,
1645 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
1646 splt->contents + h->plt.offset + plt_off3);
1648 /* Fill in the entry in the global offset table with the address of
1649 the relocating stub. */
1650 bfd_put_32 (output_bfd,
1651 (splt->output_section->vma
1652 + splt->output_offset
1655 sgotplt->contents + got_offset);
1657 /* Fill in the entry in the .rela.plt section. */
1658 rela.r_offset = (sgotplt->output_section->vma
1659 + sgotplt->output_offset
1661 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
1663 loc = srela->contents + gotplt_index * sizeof (Elf32_External_Rela);
1664 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1667 if (!h->def_regular)
1669 /* Mark the symbol as undefined, rather than as defined in
1670 the .plt section. Leave the value alone. */
1671 sym->st_shndx = SHN_UNDEF;
1673 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
1674 know whether resetting the value is significant; if it really
1675 is, rather than a quirk or bug in the sparc port, then I
1676 believe we'd see this elsewhere. */
1677 /* If the symbol is weak, we do need to clear the value.
1678 Otherwise, the PLT entry would provide a definition for
1679 the symbol even if the symbol wasn't defined anywhere,
1680 and so the symbol would never be NULL. */
1681 if (!h->ref_regular_nonweak)
1686 /* For an ordinary program, we emit .got relocs only for symbols that
1687 are in the dynamic-symbols table and are either defined by the
1688 program or are undefined weak symbols, or are function symbols
1689 where we do not output a PLT: the PLT reloc was output above and all
1690 references to the function symbol are redirected to the PLT. */
1691 if (h->got.offset != (bfd_vma) -1
1693 || (h->dynindx != -1
1694 && h->plt.offset == (bfd_vma) -1
1696 && h->root.type != bfd_link_hash_undefweak)))
1700 Elf_Internal_Rela rela;
1704 /* This symbol has an entry in the global offset table. Set it up. */
1706 sgot = bfd_get_section_by_name (dynobj, ".got");
1707 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1708 BFD_ASSERT (sgot != NULL && srela != NULL);
1710 rela.r_offset = (sgot->output_section->vma
1711 + sgot->output_offset
1712 + (h->got.offset &~ (bfd_vma) 1));
1714 /* If this is a static link, or it is a -Bsymbolic link and the
1715 symbol is defined locally or was forced to be local because
1716 of a version file, we just want to emit a RELATIVE reloc.
1717 The entry in the global offset table will already have been
1718 initialized in the relocate_section function. */
1719 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
1720 if (! elf_hash_table (info)->dynamic_sections_created
1722 && (info->symbolic || h->dynindx == -1)
1725 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1726 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
1730 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
1731 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
1735 loc = srela->contents;
1736 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1737 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1743 Elf_Internal_Rela rela;
1746 /* This symbol needs a copy reloc. Set it up. */
1748 BFD_ASSERT (h->dynindx != -1
1749 && (h->root.type == bfd_link_hash_defined
1750 || h->root.type == bfd_link_hash_defweak));
1752 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1754 BFD_ASSERT (s != NULL);
1756 rela.r_offset = (h->root.u.def.value
1757 + h->root.u.def.section->output_section->vma
1758 + h->root.u.def.section->output_offset);
1759 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
1761 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1762 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1765 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1766 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1767 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1768 sym->st_shndx = SHN_ABS;
1773 /* Finish up the dynamic sections. */
1776 elf_cris_finish_dynamic_sections (output_bfd, info)
1778 struct bfd_link_info *info;
1784 dynobj = elf_hash_table (info)->dynobj;
1786 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1787 BFD_ASSERT (sgot != NULL);
1788 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1790 if (elf_hash_table (info)->dynamic_sections_created)
1793 Elf32_External_Dyn *dyncon, *dynconend;
1795 splt = bfd_get_section_by_name (dynobj, ".plt");
1796 BFD_ASSERT (splt != NULL && sdyn != NULL);
1798 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1799 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1800 for (; dyncon < dynconend; dyncon++)
1802 Elf_Internal_Dyn dyn;
1805 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1813 s = bfd_get_section_by_name (output_bfd, ".got");
1814 BFD_ASSERT (s != NULL);
1815 dyn.d_un.d_ptr = s->vma;
1816 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1820 /* Yes, we *can* have a .plt and no .plt.rela, for instance
1821 if all symbols are found in the .got (not .got.plt). */
1822 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1823 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
1824 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1828 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1832 dyn.d_un.d_val = s->size;
1833 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1837 /* The procedure linkage table relocs (DT_JMPREL) should
1838 not be included in the overall relocs (DT_RELA).
1839 Therefore, we override the DT_RELASZ entry here to
1840 make it not include the JMPREL relocs. Since the
1841 linker script arranges for .rela.plt to follow all
1842 other relocation sections, we don't have to worry
1843 about changing the DT_RELA entry. */
1844 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1846 dyn.d_un.d_val -= s->size;
1847 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1852 /* Fill in the first entry in the procedure linkage table. */
1855 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1858 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
1859 PLT_ENTRY_SIZE_V32);
1862 memcpy (splt->contents, elf_cris_plt0_entry_v32,
1863 PLT_ENTRY_SIZE_V32);
1864 bfd_put_32 (output_bfd,
1865 sgot->output_section->vma
1866 + sgot->output_offset + 4,
1867 splt->contents + 4);
1869 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1870 = PLT_ENTRY_SIZE_V32;
1876 memcpy (splt->contents, elf_cris_pic_plt0_entry,
1880 memcpy (splt->contents, elf_cris_plt0_entry,
1882 bfd_put_32 (output_bfd,
1883 sgot->output_section->vma
1884 + sgot->output_offset + 4,
1885 splt->contents + 6);
1886 bfd_put_32 (output_bfd,
1887 sgot->output_section->vma
1888 + sgot->output_offset + 8,
1889 splt->contents + 14);
1891 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1898 /* Fill in the first three entries in the global offset table. */
1902 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1904 bfd_put_32 (output_bfd,
1905 sdyn->output_section->vma + sdyn->output_offset,
1907 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1908 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1911 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1916 /* Return the section that should be marked against GC for a given
1920 cris_elf_gc_mark_hook (sec, info, rel, h, sym)
1922 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1923 Elf_Internal_Rela *rel;
1924 struct elf_link_hash_entry *h;
1925 Elf_Internal_Sym *sym;
1929 switch (ELF32_R_TYPE (rel->r_info))
1931 case R_CRIS_GNU_VTINHERIT:
1932 case R_CRIS_GNU_VTENTRY:
1936 switch (h->root.type)
1938 case bfd_link_hash_defined:
1939 case bfd_link_hash_defweak:
1940 return h->root.u.def.section;
1942 case bfd_link_hash_common:
1943 return h->root.u.c.p->section;
1951 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1956 /* Update the got entry reference counts for the section being removed. */
1959 cris_elf_gc_sweep_hook (abfd, info, sec, relocs)
1960 bfd *abfd ATTRIBUTE_UNUSED;
1961 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1962 asection *sec ATTRIBUTE_UNUSED;
1963 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
1965 Elf_Internal_Shdr *symtab_hdr;
1966 struct elf_link_hash_entry **sym_hashes;
1967 bfd_signed_vma *local_got_refcounts;
1968 const Elf_Internal_Rela *rel, *relend;
1973 dynobj = elf_hash_table (info)->dynobj;
1977 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1978 sym_hashes = elf_sym_hashes (abfd);
1979 local_got_refcounts = elf_local_got_refcounts (abfd);
1981 sgot = bfd_get_section_by_name (dynobj, ".got");
1982 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1984 relend = relocs + sec->reloc_count;
1985 for (rel = relocs; rel < relend; rel++)
1987 unsigned long r_symndx;
1988 struct elf_link_hash_entry *h = NULL;
1990 r_symndx = ELF32_R_SYM (rel->r_info);
1991 if (r_symndx >= symtab_hdr->sh_info)
1993 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1994 while (h->root.type == bfd_link_hash_indirect
1995 || h->root.type == bfd_link_hash_warning)
1996 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1999 switch (ELF32_R_TYPE (rel->r_info))
2005 if (h->got.refcount > 0)
2008 if (h->got.refcount == 0)
2010 /* We don't need the .got entry any more. */
2012 srelgot->size -= sizeof (Elf32_External_Rela);
2019 if (local_got_refcounts != NULL)
2021 if (local_got_refcounts[r_symndx] > 0)
2023 --local_got_refcounts[r_symndx];
2024 if (local_got_refcounts[r_symndx] == 0)
2026 /* We don't need the .got entry any more. */
2029 srelgot->size -= sizeof (Elf32_External_Rela);
2035 case R_CRIS_16_GOTPLT:
2036 case R_CRIS_32_GOTPLT:
2037 /* For local symbols, treat these like GOT relocs. */
2039 goto local_got_reloc;
2042 case R_CRIS_32_PLT_GOTREL:
2043 /* FIXME: We don't garbage-collect away the .got section. */
2044 if (local_got_refcounts != NULL)
2045 local_got_refcounts[-1]--;
2048 case R_CRIS_8_PCREL:
2049 case R_CRIS_16_PCREL:
2050 case R_CRIS_32_PCREL:
2051 case R_CRIS_32_PLT_PCREL:
2054 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2055 && h->plt.refcount > 0)
2068 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2069 entry but we found we will not create any. Called when we find we will
2070 not have any PLT for this symbol, by for example
2071 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2072 or elf_cris_size_dynamic_sections if no dynamic sections will be
2073 created (we're only linking static objects). */
2076 elf_cris_adjust_gotplt_to_got (h, p)
2077 struct elf_cris_link_hash_entry *h;
2080 struct bfd_link_info *info = (struct bfd_link_info *) p;
2081 bfd *dynobj = elf_hash_table (info)->dynobj;
2083 BFD_ASSERT (dynobj != NULL);
2085 if (h->root.root.type == bfd_link_hash_warning)
2086 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2088 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2089 if (h->gotplt_refcount <= 0)
2092 if (h->root.got.refcount > 0)
2094 /* There's a GOT entry for this symbol. Just adjust the refcount.
2095 Probably not necessary at this stage, but keeping it accurate
2096 helps avoiding surprises later. */
2097 h->root.got.refcount += h->gotplt_refcount;
2098 h->gotplt_refcount = 0;
2102 /* No GOT entry for this symbol. We need to create one. */
2103 asection *sgot = bfd_get_section_by_name (dynobj, ".got");
2105 = bfd_get_section_by_name (dynobj, ".rela.got");
2107 /* Put an accurate refcount there. */
2108 h->root.got.refcount = h->gotplt_refcount;
2110 h->gotplt_refcount = 0;
2112 /* We always have a .got and a .rela.got section if there were
2113 GOTPLT relocs in input. */
2114 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2116 /* Allocate space in the .got section. */
2119 /* Allocate relocation space. */
2120 srelgot->size += sizeof (Elf32_External_Rela);
2126 /* Try to fold PLT entries with GOT entries. There are two cases when we
2129 - When all PLT references are GOTPLT references, and there are GOT
2130 references, and this is not the executable. We don't have to
2131 generate a PLT at all.
2133 - When there are both (ordinary) PLT references and GOT references,
2134 and this isn't the executable.
2135 We want to make the PLT reference use the ordinary GOT entry rather
2136 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2137 since the GOT entry will have to be resolved at startup anyway.
2139 Though the latter case is handled when room for the PLT is allocated,
2142 By folding into the GOT, we may need a round-trip to a PLT in the
2143 executable for calls, a loss in performance. Still, losing a
2144 reloc is a win in size and at least in start-up time.
2146 Note that this function is called before symbols are forced local by
2147 version scripts. The differing cases are handled by
2148 elf_cris_hide_symbol. */
2151 elf_cris_try_fold_plt_to_got (h, p)
2152 struct elf_cris_link_hash_entry *h;
2155 struct bfd_link_info *info = (struct bfd_link_info *) p;
2157 /* If there are no GOT references for this symbol, we can't fold any
2158 other reference so there's nothing to do. Likewise if there are no
2159 PLT references; GOTPLT references included. */
2160 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2163 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2164 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2166 if (h->gotplt_refcount == h->root.plt.refcount)
2168 /* The only PLT references are GOTPLT references, and there are GOT
2169 references. Convert PLT to GOT references. */
2170 if (! elf_cris_adjust_gotplt_to_got (h, info))
2173 /* Clear the PLT references, so no PLT will be created. */
2174 h->root.plt.offset = (bfd_vma) -1;
2180 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2181 to use a GOT entry (and create one) rather than requiring a GOTPLT
2185 elf_cris_hide_symbol (info, h, force_local)
2186 struct bfd_link_info *info;
2187 struct elf_link_hash_entry *h;
2188 bfd_boolean force_local;
2190 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2192 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2195 /* Adjust a symbol defined by a dynamic object and referenced by a
2196 regular object. The current definition is in some section of the
2197 dynamic object, but we're not including those sections. We have to
2198 change the definition to something the rest of the link can
2202 elf_cris_adjust_dynamic_symbol (info, h)
2203 struct bfd_link_info *info;
2204 struct elf_link_hash_entry *h;
2208 unsigned int power_of_two;
2209 bfd_size_type plt_entry_size;
2211 dynobj = elf_hash_table (info)->dynobj;
2213 /* Make sure we know what is going on here. */
2214 BFD_ASSERT (dynobj != NULL
2216 || h->u.weakdef != NULL
2219 && !h->def_regular)));
2222 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2223 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2225 /* If this is a function, put it in the procedure linkage table. We
2226 will fill in the contents of the procedure linkage table later,
2227 when we know the address of the .got section. */
2228 if (h->type == STT_FUNC
2231 /* If we link a program (not a DSO), we'll get rid of unnecessary
2232 PLT entries; we point to the actual symbols -- even for pic
2233 relocs, because a program built with -fpic should have the same
2234 result as one built without -fpic, specifically considering weak
2236 FIXME: m68k and i386 differ here, for unclear reasons. */
2240 /* This case can occur if we saw a PLT reloc in an input file,
2241 but the symbol was not defined by a dynamic object. In such
2242 a case, we don't actually need to build a procedure linkage
2243 table, and we can just do an absolute or PC reloc instead, or
2244 change a .got.plt index to a .got index for GOTPLT relocs. */
2245 BFD_ASSERT (h->needs_plt);
2247 h->plt.offset = (bfd_vma) -1;
2249 elf_cris_adjust_gotplt_to_got ((struct
2250 elf_cris_link_hash_entry *) h,
2254 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2255 where a pointer-equivalent symbol was unimportant (i.e. more
2256 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2257 of the PLT. We can't for the executable, because the GOT
2258 entries will point to the PLT there (and be constant). */
2260 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2264 /* GC or folding may have rendered this entry unused. */
2265 if (h->plt.refcount <= 0)
2268 h->plt.offset = (bfd_vma) -1;
2272 /* Make sure this symbol is output as a dynamic symbol. */
2273 if (h->dynindx == -1)
2275 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2279 s = bfd_get_section_by_name (dynobj, ".plt");
2280 BFD_ASSERT (s != NULL);
2282 /* If this is the first .plt entry, make room for the special
2285 s->size += plt_entry_size;
2287 /* If this symbol is not defined in a regular file, and we are
2288 not generating a shared library, then set the symbol to this
2289 location in the .plt. */
2293 h->root.u.def.section = s;
2294 h->root.u.def.value = s->size;
2297 /* If there's already a GOT entry, use that, not a .got.plt. A
2298 GOT field still has a reference count when we get here; it's
2299 not yet changed to an offset. We can't do this for an
2300 executable, because then the reloc associated with the PLT
2301 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2302 this to elf_cris_try_fold_plt_to_got. */
2303 if (info->shared && h->got.refcount > 0)
2305 h->got.refcount += h->plt.refcount;
2307 /* Mark the PLT offset to use the GOT entry by setting the low
2308 bit in the plt offset; it is always a multiple of
2309 plt_entry_size (which is at least a multiple of 2). */
2310 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2312 /* Change the PLT refcount to an offset. */
2313 h->plt.offset = s->size;
2315 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2316 that the got entry should be used instead. */
2317 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2318 h)->gotplt_offset == 0);
2320 /* Make room for this entry. */
2321 s->size += plt_entry_size;
2326 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2327 h->plt.offset = s->size;
2329 /* Make room for this entry. */
2330 s->size += plt_entry_size;
2332 /* We also need to make an entry in the .got.plt section, which
2333 will be placed in the .got section by the linker script. */
2334 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2335 = elf_cris_hash_table (info)->next_gotplt_entry;
2336 elf_cris_hash_table (info)->next_gotplt_entry += 4;
2338 s = bfd_get_section_by_name (dynobj, ".got.plt");
2339 BFD_ASSERT (s != NULL);
2342 /* We also need to make an entry in the .rela.plt section. */
2344 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2345 BFD_ASSERT (s != NULL);
2346 s->size += sizeof (Elf32_External_Rela);
2351 /* Reinitialize the plt offset now that it is not used as a reference
2353 h->plt.offset = (bfd_vma) -1;
2355 /* If this is a weak symbol, and there is a real definition, the
2356 processor independent code will have arranged for us to see the
2357 real definition first, and we can just use the same value. */
2358 if (h->u.weakdef != NULL)
2360 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2361 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2362 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2363 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2367 /* This is a reference to a symbol defined by a dynamic object which
2368 is not a function. */
2370 /* If we are creating a shared library, we must presume that the
2371 only references to the symbol are via the global offset table.
2372 For such cases we need not do anything here; the relocations will
2373 be handled correctly by relocate_section. */
2377 /* If there are no references to this symbol that do not use the
2378 GOT, we don't need to generate a copy reloc. */
2379 if (!h->non_got_ref)
2382 /* We must allocate the symbol in our .dynbss section, which will
2383 become part of the .bss section of the executable. There will be
2384 an entry for this symbol in the .dynsym section. The dynamic
2385 object will contain position independent code, so all references
2386 from the dynamic object to this symbol will go through the global
2387 offset table. The dynamic linker will use the .dynsym entry to
2388 determine the address it must put in the global offset table, so
2389 both the dynamic object and the regular object will refer to the
2390 same memory location for the variable. */
2392 s = bfd_get_section_by_name (dynobj, ".dynbss");
2393 BFD_ASSERT (s != NULL);
2395 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2396 copy the initial value out of the dynamic object and into the
2397 runtime process image. We need to remember the offset into the
2398 .rela.bss section we are going to use. */
2399 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2403 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
2404 BFD_ASSERT (srel != NULL);
2405 srel->size += sizeof (Elf32_External_Rela);
2409 /* Historic precedent: m68k and i386 allow max 8-byte alignment for the
2410 thing to copy; so do we. */
2412 /* We need to figure out the alignment required for this symbol. I
2413 have no idea how ELF linkers handle this. */
2414 power_of_two = bfd_log2 (h->size);
2415 if (power_of_two > 3)
2418 /* Apply the required alignment. */
2419 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
2420 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2422 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
2426 /* Define the symbol as being at this point in the section. */
2427 h->root.u.def.section = s;
2428 h->root.u.def.value = s->size;
2430 /* Increment the section size to make room for the symbol. */
2436 /* Look through the relocs for a section during the first phase. */
2439 cris_elf_check_relocs (abfd, info, sec, relocs)
2441 struct bfd_link_info *info;
2443 const Elf_Internal_Rela *relocs;
2446 Elf_Internal_Shdr *symtab_hdr;
2447 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2448 bfd_signed_vma *local_got_refcounts;
2449 const Elf_Internal_Rela *rel;
2450 const Elf_Internal_Rela *rel_end;
2455 if (info->relocatable)
2458 dynobj = elf_hash_table (info)->dynobj;
2459 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2460 sym_hashes = elf_sym_hashes (abfd);
2461 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
2462 local_got_refcounts = elf_local_got_refcounts (abfd);
2468 if (!elf_bad_symtab (abfd))
2469 sym_hashes_end -= symtab_hdr->sh_info;
2471 rel_end = relocs + sec->reloc_count;
2472 for (rel = relocs; rel < rel_end; rel++)
2474 struct elf_link_hash_entry *h;
2475 unsigned long r_symndx;
2476 enum elf_cris_reloc_type r_type;
2478 r_symndx = ELF32_R_SYM (rel->r_info);
2479 if (r_symndx < symtab_hdr->sh_info)
2482 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2484 r_type = ELF32_R_TYPE (rel->r_info);
2486 /* Some relocs require linker-created sections; we need to hang them
2487 on the first input bfd we found that contained dynamic relocs. */
2492 case R_CRIS_32_GOTREL:
2493 case R_CRIS_32_PLT_GOTREL:
2494 case R_CRIS_32_PLT_PCREL:
2495 case R_CRIS_16_GOTPLT:
2496 case R_CRIS_32_GOTPLT:
2499 elf_hash_table (info)->dynobj = dynobj = abfd;
2501 /* We could handle this if we can get a handle on the
2502 output bfd in elf_cris_adjust_dynamic_symbol. Failing
2503 that, we must insist on dynobj being a specific mach. */
2504 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
2506 (*_bfd_error_handler)
2507 (_("%B, section %A:\n v10/v32 compatible object %s"
2508 " must not contain a PIC relocation"),
2513 /* Create the .got section, so we can assume it's always
2514 present whenever there's a dynobj. */
2515 if (!_bfd_elf_create_got_section (dynobj, info))
2524 /* Some relocs require a global offset table (but perhaps not a
2525 specific GOT entry). */
2528 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
2529 entry only for local symbols. Unfortunately, we don't know
2530 until later on if there's a version script that forces the
2531 symbol local. We must have the .rela.got section in place
2532 before we know if the symbol looks global now, so we need
2533 to treat the reloc just like for R_CRIS_16_GOT and
2535 case R_CRIS_16_GOTPLT:
2536 case R_CRIS_32_GOTPLT:
2540 && (h != NULL || info->shared))
2542 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2543 if (srelgot == NULL)
2545 srelgot = bfd_make_section (dynobj, ".rela.got");
2547 || !bfd_set_section_flags (dynobj, srelgot,
2552 | SEC_LINKER_CREATED
2554 || !bfd_set_section_alignment (dynobj, srelgot, 2))
2560 case R_CRIS_32_GOTREL:
2561 case R_CRIS_32_PLT_GOTREL:
2563 sgot = bfd_get_section_by_name (dynobj, ".got");
2565 if (local_got_refcounts == NULL)
2569 /* We use index local_got_refcounts[-1] to count all
2570 GOT-relative relocations that do not have explicit
2572 amt = symtab_hdr->sh_info + 1;
2573 amt *= sizeof (bfd_signed_vma);
2574 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
2575 if (local_got_refcounts == NULL)
2578 local_got_refcounts++;
2579 elf_local_got_refcounts (abfd) = local_got_refcounts;
2589 case R_CRIS_16_GOTPLT:
2590 case R_CRIS_32_GOTPLT:
2591 /* Mark that we need a GOT entry if the PLT entry (and its GOT
2592 entry) is eliminated. We can only do this for a non-local
2596 ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++;
2597 goto handle_gotplt_reloc;
2599 /* If h is NULL then this is a local symbol, and we must make a
2600 GOT entry for it, so handle it like a GOT reloc. */
2605 /* This symbol requires a global offset table entry. */
2608 if (h->got.refcount == 0)
2610 /* Make sure this symbol is output as a dynamic symbol. */
2611 if (h->dynindx == -1)
2613 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2617 /* Allocate space in the .got section. */
2619 /* Allocate relocation space. */
2620 srelgot->size += sizeof (Elf32_External_Rela);
2626 /* This is a global offset table entry for a local symbol. */
2627 if (local_got_refcounts[r_symndx] == 0)
2632 /* If we are generating a shared object, we need to
2633 output a R_CRIS_RELATIVE reloc so that the dynamic
2634 linker can adjust this GOT entry. */
2635 srelgot->size += sizeof (Elf32_External_Rela);
2638 local_got_refcounts[r_symndx]++;
2642 case R_CRIS_32_GOTREL:
2643 /* This reference requires a global offset table.
2644 FIXME: The actual refcount isn't used currently; the .got
2645 section can't be removed if there were any references in the
2647 local_got_refcounts[-1]++;
2650 handle_gotplt_reloc:
2652 case R_CRIS_32_PLT_GOTREL:
2653 /* This reference requires a global offset table. */
2654 local_got_refcounts[-1]++;
2657 case R_CRIS_32_PLT_PCREL:
2658 /* This symbol requires a procedure linkage table entry. We
2659 actually build the entry in adjust_dynamic_symbol,
2660 because this might be a case of linking PIC code which is
2661 never referenced by a dynamic object, in which case we
2662 don't need to generate a procedure linkage table entry
2665 /* Beware: if we'd check for visibility of the symbol here
2666 (and not marking the need for a PLT when non-visible), we'd
2667 get into trouble with keeping handling consistent with
2668 regards to relocs found before definition and GOTPLT
2669 handling. Eliminable PLT entries will be dealt with later
2681 /* Let's help debug shared library creation. Any of these
2682 relocs can be used in shared libs, but pages containing them
2683 cannot be shared. Don't warn for sections we don't care
2684 about, such as debug sections or non-constant sections. We
2685 can't help tables of (global) function pointers, for example,
2686 though they must be emitted in a data section to avoid having
2687 impure text sections. */
2689 && (sec->flags & SEC_ALLOC) != 0
2690 && (sec->flags & SEC_READONLY) != 0)
2692 /* FIXME: How do we make this optionally a warning only? */
2693 (*_bfd_error_handler)
2694 (_("%B, section %A:\n relocation %s should not"
2695 " be used in a shared object; recompile with -fPIC"),
2698 cris_elf_howto_table[r_type].name);
2702 case R_CRIS_8_PCREL:
2703 case R_CRIS_16_PCREL:
2704 case R_CRIS_32_PCREL:
2709 /* Make sure a plt entry is created for this symbol if it
2710 turns out to be a function defined by a dynamic object. */
2711 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2715 /* If we are creating a shared library and this is not a local
2716 symbol, we need to copy the reloc into the shared library.
2717 However when linking with -Bsymbolic and this is a global
2718 symbol which is defined in an object we are including in the
2719 link (i.e., DEF_REGULAR is set), then we can resolve the
2720 reloc directly. At this point we have not seen all the input
2721 files, so it is possible that DEF_REGULAR is not set now but
2722 will be set later (it is never cleared). In case of a weak
2723 definition, DEF_REGULAR may be cleared later by a strong
2724 definition in a shared library. We account for that
2725 possibility below by storing information in the relocs_copied
2726 field of the hash table entry. A similar situation occurs
2727 when creating shared libraries and symbol visibility changes
2728 render the symbol local. */
2730 /* No need to do anything if we're not creating a shared object. */
2734 /* We don't need to handle relocs into sections not going into
2735 the "real" output. */
2736 if ((sec->flags & SEC_ALLOC) == 0)
2739 /* We can only eliminate PC-relative relocs. */
2740 if (r_type == R_CRIS_8_PCREL
2741 || r_type == R_CRIS_16_PCREL
2742 || r_type == R_CRIS_32_PCREL)
2744 /* If the symbol is local, then we can eliminate the reloc. */
2745 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2748 /* If this is with -Bsymbolic and the symbol isn't weak, and
2749 is defined by an ordinary object (the ones we include in
2750 this shared library) then we can also eliminate the
2751 reloc. See comment above for more eliminable cases which
2752 we can't identify at this time. */
2754 && h->root.type != bfd_link_hash_defweak
2758 if ((sec->flags & SEC_READONLY) != 0)
2760 /* FIXME: How do we make this optionally a warning only? */
2761 (*_bfd_error_handler)
2762 (_("%B, section %A:\n relocation %s should not be used"
2763 " in a shared object; recompile with -fPIC"),
2766 cris_elf_howto_table[r_type].name);
2770 /* We create a reloc section in dynobj and make room for this
2776 name = (bfd_elf_string_from_elf_section
2778 elf_elfheader (abfd)->e_shstrndx,
2779 elf_section_data (sec)->rel_hdr.sh_name));
2783 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2784 && strcmp (bfd_get_section_name (abfd, sec),
2787 sreloc = bfd_get_section_by_name (dynobj, name);
2790 sreloc = bfd_make_section (dynobj, name);
2792 || !bfd_set_section_flags (dynobj, sreloc,
2797 | SEC_LINKER_CREATED
2799 || !bfd_set_section_alignment (dynobj, sreloc, 2))
2802 if (sec->flags & SEC_READONLY)
2803 info->flags |= DF_TEXTREL;
2806 sreloc->size += sizeof (Elf32_External_Rela);
2808 /* If we are linking with -Bsymbolic, we count the number of PC
2809 relative relocations we have entered for this symbol, so that
2810 we can discard them again if the symbol is later defined by a
2811 regular object. We know that h is really a pointer to an
2812 elf_cris_link_hash_entry. */
2813 if ((r_type == R_CRIS_8_PCREL
2814 || r_type == R_CRIS_16_PCREL
2815 || r_type == R_CRIS_32_PCREL)
2818 struct elf_cris_link_hash_entry *eh;
2819 struct elf_cris_pcrel_relocs_copied *p;
2821 eh = (struct elf_cris_link_hash_entry *) h;
2823 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2824 if (p->section == sreloc)
2829 p = ((struct elf_cris_pcrel_relocs_copied *)
2830 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2833 p->next = eh->pcrel_relocs_copied;
2834 eh->pcrel_relocs_copied = p;
2835 p->section = sreloc;
2843 /* This relocation describes the C++ object vtable hierarchy.
2844 Reconstruct it for later use during GC. */
2845 case R_CRIS_GNU_VTINHERIT:
2846 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2850 /* This relocation describes which C++ vtable entries are actually
2851 used. Record for later use during GC. */
2852 case R_CRIS_GNU_VTENTRY:
2853 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2858 /* Other relocs do not appear here. */
2859 bfd_set_error (bfd_error_bad_value);
2867 /* Set the sizes of the dynamic sections. */
2870 elf_cris_size_dynamic_sections (output_bfd, info)
2871 bfd *output_bfd ATTRIBUTE_UNUSED;
2872 struct bfd_link_info *info;
2879 dynobj = elf_hash_table (info)->dynobj;
2880 BFD_ASSERT (dynobj != NULL);
2882 if (elf_hash_table (info)->dynamic_sections_created)
2884 /* Set the contents of the .interp section to the interpreter. */
2885 if (info->executable)
2887 s = bfd_get_section_by_name (dynobj, ".interp");
2888 BFD_ASSERT (s != NULL);
2889 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2890 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2895 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
2896 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2897 elf_cris_adjust_gotplt_to_got,
2900 /* We may have created entries in the .rela.got section.
2901 However, if we are not creating the dynamic sections, we will
2902 not actually use these entries. Reset the size of .rela.got,
2903 which will cause it to get stripped from the output file
2905 s = bfd_get_section_by_name (dynobj, ".rela.got");
2910 /* If this is a -Bsymbolic shared link, then we need to discard all PC
2911 relative relocs against symbols defined in a regular object. We
2912 allocated space for them in the check_relocs routine, but we will not
2913 fill them in in the relocate_section routine. We also discard space
2914 for relocs that have become for local symbols due to symbol
2915 visibility changes. For programs, we discard space for relocs for
2916 symbols not referenced by any dynamic object. */
2918 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2919 elf_cris_discard_excess_dso_dynamics,
2922 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2923 elf_cris_discard_excess_program_dynamics,
2926 /* The check_relocs and adjust_dynamic_symbol entry points have
2927 determined the sizes of the various dynamic sections. Allocate
2931 for (s = dynobj->sections; s != NULL; s = s->next)
2936 if ((s->flags & SEC_LINKER_CREATED) == 0)
2939 /* It's OK to base decisions on the section name, because none
2940 of the dynobj section names depend upon the input files. */
2941 name = bfd_get_section_name (dynobj, s);
2945 if (strcmp (name, ".plt") == 0)
2949 /* Strip this section if we don't need it; see the
2955 /* Remember whether there is a PLT. */
2959 else if (strncmp (name, ".rela", 5) == 0)
2963 /* If we don't need this section, strip it from the
2964 output file. This is mostly to handle .rela.bss and
2965 .rela.plt. We must create both sections in
2966 create_dynamic_sections, because they must be created
2967 before the linker maps input sections to output
2968 sections. The linker does that before
2969 adjust_dynamic_symbol is called, and it is that
2970 function which decides whether anything needs to go
2971 into these sections. */
2976 /* Remember whether there are any reloc sections other
2978 if (strcmp (name, ".rela.plt") != 0)
2981 /* We use the reloc_count field as a counter if we need
2982 to copy relocs into the output file. */
2986 else if (strncmp (name, ".got", 4) != 0)
2988 /* It's not one of our sections, so don't allocate space. */
2994 s->flags |= SEC_EXCLUDE;
2998 /* Allocate memory for the section contents. We use bfd_zalloc here
2999 in case unused entries are not reclaimed before the section's
3000 contents are written out. This should not happen, but this way
3001 if it does, we will not write out garbage. For reloc sections,
3002 this will make entries have the type R_CRIS_NONE. */
3003 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3004 if (s->contents == NULL && s->size != 0)
3008 if (elf_hash_table (info)->dynamic_sections_created)
3010 /* Add some entries to the .dynamic section. We fill in the
3011 values later, in elf_cris_finish_dynamic_sections, but we
3012 must add the entries now so that we get the correct size for
3013 the .dynamic section. The DT_DEBUG entry is filled in by the
3014 dynamic linker and used by the debugger. */
3015 #define add_dynamic_entry(TAG, VAL) \
3016 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3020 if (!add_dynamic_entry (DT_DEBUG, 0))
3026 if (!add_dynamic_entry (DT_PLTGOT, 0)
3027 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3028 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3029 || !add_dynamic_entry (DT_JMPREL, 0))
3035 if (!add_dynamic_entry (DT_RELA, 0)
3036 || !add_dynamic_entry (DT_RELASZ, 0)
3037 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3041 if ((info->flags & DF_TEXTREL) != 0)
3043 if (!add_dynamic_entry (DT_TEXTREL, 0))
3045 info->flags |= DF_TEXTREL;
3048 #undef add_dynamic_entry
3053 /* This function is called via elf_cris_link_hash_traverse if we are
3054 creating a shared object. In the -Bsymbolic case, it discards the
3055 space allocated to copy PC relative relocs against symbols which
3056 are defined in regular objects. For the normal non-symbolic case,
3057 we also discard space for relocs that have become local due to
3058 symbol visibility changes. We allocated space for them in the
3059 check_relocs routine, but we won't fill them in in the
3060 relocate_section routine. */
3063 elf_cris_discard_excess_dso_dynamics (h, inf)
3064 struct elf_cris_link_hash_entry *h;
3067 struct elf_cris_pcrel_relocs_copied *s;
3068 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3070 if (h->root.root.type == bfd_link_hash_warning)
3071 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3073 /* If a symbol has been forced local or we have found a regular
3074 definition for the symbolic link case, then we won't be needing
3076 if (h->root.def_regular
3077 && (h->root.forced_local
3080 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3081 s->section->size -= s->count * sizeof (Elf32_External_Rela);
3087 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3088 creating a shared object. We discard space for relocs for symbols put
3089 in the .got, but which we found we do not have to resolve at run-time. */
3092 elf_cris_discard_excess_program_dynamics (h, inf)
3093 struct elf_cris_link_hash_entry *h;
3096 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3098 if (h->root.root.type == bfd_link_hash_warning)
3099 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3101 /* If we're not creating a shared library and have a symbol which is
3102 referred to by .got references, but the symbol is defined locally,
3103 (or rather, not defined by a DSO) then lose the reloc for the .got
3104 (don't allocate room for it). Likewise for relocs for something
3105 for which we create a PLT. */
3106 if (!h->root.def_dynamic
3107 || h->root.plt.refcount > 0)
3109 if (h->root.got.refcount > 0
3110 /* The size of this section is only valid and in sync with the
3111 various reference counts if we do dynamic; don't decrement it
3113 && elf_hash_table (info)->dynamic_sections_created)
3115 bfd *dynobj = elf_hash_table (info)->dynobj;
3118 BFD_ASSERT (dynobj != NULL);
3120 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3122 BFD_ASSERT (srelgot != NULL);
3124 srelgot->size -= sizeof (Elf32_External_Rela);
3127 /* If the locally-defined symbol isn't used by a DSO, then we don't
3128 have to export it as a dynamic symbol. This was already done for
3129 functions; doing this for all symbols would presumably not
3130 introduce new problems. Of course we don't do this if we're
3131 exporting all dynamic symbols. */
3132 if (! info->export_dynamic
3133 && h->root.dynindx != -1
3134 && !h->root.def_dynamic
3135 && !h->root.ref_dynamic)
3137 h->root.dynindx = -1;
3138 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3139 h->root.dynstr_index);
3146 /* Reject a file depending on presence and expectation of prefixed
3147 underscores on symbols. */
3150 cris_elf_object_p (abfd)
3153 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3156 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3157 return (bfd_get_symbol_leading_char (abfd) == '_');
3159 return (bfd_get_symbol_leading_char (abfd) == 0);
3162 /* Mark presence or absence of leading underscore. Set machine type
3163 flags from mach type. */
3166 cris_elf_final_write_processing (abfd, linker)
3168 bfd_boolean linker ATTRIBUTE_UNUSED;
3170 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3172 e_flags &= ~EF_CRIS_UNDERSCORE;
3173 if (bfd_get_symbol_leading_char (abfd) == '_')
3174 e_flags |= EF_CRIS_UNDERSCORE;
3176 switch (bfd_get_mach (abfd))
3178 case bfd_mach_cris_v0_v10:
3179 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3182 case bfd_mach_cris_v10_v32:
3183 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3186 case bfd_mach_cris_v32:
3187 e_flags |= EF_CRIS_VARIANT_V32;
3191 _bfd_abort (__FILE__, __LINE__,
3192 _("Unexpected machine number"));
3195 elf_elfheader (abfd)->e_flags = e_flags;
3198 /* Set the mach type from e_flags value. */
3201 cris_elf_set_mach_from_flags (abfd, flags)
3203 unsigned long flags;
3205 switch (flags & EF_CRIS_VARIANT_MASK)
3207 case EF_CRIS_VARIANT_ANY_V0_V10:
3208 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3211 case EF_CRIS_VARIANT_V32:
3212 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3215 case EF_CRIS_VARIANT_COMMON_V10_V32:
3216 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3220 /* Since we don't recognize them, we obviously can't support them
3221 with this code; we'd have to require that all future handling
3222 would be optional. */
3223 bfd_set_error (bfd_error_wrong_format);
3230 /* Display the flags field. */
3233 cris_elf_print_private_bfd_data (abfd, ptr)
3237 FILE *file = (FILE *) ptr;
3239 BFD_ASSERT (abfd != NULL && ptr != NULL);
3241 _bfd_elf_print_private_bfd_data (abfd, ptr);
3243 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3245 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3246 fprintf (file, _(" [symbols have a _ prefix]"));
3247 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3248 == EF_CRIS_VARIANT_COMMON_V10_V32)
3249 fprintf (file, _(" [v10 and v32]"));
3250 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3251 == EF_CRIS_VARIANT_V32)
3252 fprintf (file, _(" [v32]"));
3258 /* Don't mix files with and without a leading underscore. */
3261 cris_elf_merge_private_bfd_data (ibfd, obfd)
3267 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3270 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3271 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3274 imach = bfd_get_mach (ibfd);
3276 if (! elf_flags_init (obfd))
3278 /* This happens when ld starts out with a 'blank' output file. */
3279 elf_flags_init (obfd) = TRUE;
3281 /* We ignore the linker-set mach, and instead set it according to
3282 the first input file. This would also happen if we could
3283 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3284 This allows us to keep the same linker config across
3285 cris(v0..v10) and crisv32. The drawback is that we can't force
3286 the output type, which might be a sane thing to do for a
3287 v10+v32 compatibility object. */
3288 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3292 if (bfd_get_symbol_leading_char (ibfd)
3293 != bfd_get_symbol_leading_char (obfd))
3295 (*_bfd_error_handler)
3296 (bfd_get_symbol_leading_char (ibfd) == '_'
3297 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3298 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3300 bfd_set_error (bfd_error_bad_value);
3304 omach = bfd_get_mach (obfd);
3308 /* We can get an incompatible combination only if either is
3309 bfd_mach_cris_v32, and the other one isn't compatible. */
3310 if ((imach == bfd_mach_cris_v32
3311 && omach != bfd_mach_cris_v10_v32)
3312 || (omach == bfd_mach_cris_v32
3313 && imach != bfd_mach_cris_v10_v32))
3315 (*_bfd_error_handler)
3316 ((imach == bfd_mach_cris_v32)
3317 ? _("%B contains CRIS v32 code, incompatible"
3318 " with previous objects")
3319 : _("%B contains non-CRIS-v32 code, incompatible"
3320 " with previous objects"),
3322 bfd_set_error (bfd_error_bad_value);
3326 /* We don't have to check the case where the input is compatible
3327 with v10 and v32, because the output is already known to be set
3328 to the other (compatible) mach. */
3329 if (omach == bfd_mach_cris_v10_v32
3330 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3337 /* Do side-effects of e_flags copying to obfd. */
3340 cris_elf_copy_private_bfd_data (ibfd, obfd)
3344 /* Call the base function. */
3345 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3348 /* If output is big-endian for some obscure reason, stop here. */
3349 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
3352 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3353 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3356 /* Do what we really came here for. */
3357 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3360 static enum elf_reloc_type_class
3361 elf_cris_reloc_type_class (rela)
3362 const Elf_Internal_Rela *rela;
3364 switch ((int) ELF32_R_TYPE (rela->r_info))
3366 case R_CRIS_RELATIVE:
3367 return reloc_class_relative;
3368 case R_CRIS_JUMP_SLOT:
3369 return reloc_class_plt;
3371 return reloc_class_copy;
3373 return reloc_class_normal;
3377 #define ELF_ARCH bfd_arch_cris
3378 #define ELF_MACHINE_CODE EM_CRIS
3379 #define ELF_MAXPAGESIZE 0x2000
3381 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
3382 #define TARGET_LITTLE_NAME "elf32-cris"
3383 #define elf_symbol_leading_char 0
3385 #define elf_info_to_howto_rel NULL
3386 #define elf_info_to_howto cris_info_to_howto_rela
3387 #define elf_backend_relocate_section cris_elf_relocate_section
3388 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
3389 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
3390 #define elf_backend_check_relocs cris_elf_check_relocs
3391 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
3392 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
3394 #define elf_backend_can_gc_sections 1
3395 #define elf_backend_can_refcount 1
3397 #define elf_backend_object_p cris_elf_object_p
3398 #define elf_backend_final_write_processing \
3399 cris_elf_final_write_processing
3400 #define bfd_elf32_bfd_print_private_bfd_data \
3401 cris_elf_print_private_bfd_data
3402 #define bfd_elf32_bfd_merge_private_bfd_data \
3403 cris_elf_merge_private_bfd_data
3404 #define bfd_elf32_bfd_copy_private_bfd_data \
3405 cris_elf_copy_private_bfd_data
3407 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
3409 #define bfd_elf32_bfd_link_hash_table_create \
3410 elf_cris_link_hash_table_create
3411 #define elf_backend_adjust_dynamic_symbol \
3412 elf_cris_adjust_dynamic_symbol
3413 #define elf_backend_size_dynamic_sections \
3414 elf_cris_size_dynamic_sections
3415 #define elf_backend_finish_dynamic_symbol \
3416 elf_cris_finish_dynamic_symbol
3417 #define elf_backend_finish_dynamic_sections \
3418 elf_cris_finish_dynamic_sections
3419 #define elf_backend_create_dynamic_sections \
3420 _bfd_elf_create_dynamic_sections
3421 #define bfd_elf32_bfd_final_link \
3422 bfd_elf_gc_common_final_link
3423 #define elf_backend_hide_symbol elf_cris_hide_symbol
3424 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
3426 #define elf_backend_want_got_plt 1
3427 #define elf_backend_plt_readonly 1
3428 #define elf_backend_want_plt_sym 0
3429 #define elf_backend_got_header_size 12
3431 /* Later, we my want to optimize RELA entries into REL entries for dynamic
3432 linking and libraries (if it's a win of any significance). Until then,
3433 take the easy route. */
3434 #define elf_backend_may_use_rel_p 0
3435 #define elf_backend_may_use_rela_p 1
3436 #define elf_backend_rela_normal 1
3438 #include "elf32-target.h"
3440 #define INCLUDED_TARGET_FILE
3442 #undef TARGET_LITTLE_SYM
3443 #undef TARGET_LITTLE_NAME
3444 #undef elf_symbol_leading_char
3446 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
3447 #define TARGET_LITTLE_NAME "elf32-us-cris"
3448 #define elf_symbol_leading_char '_'
3450 #include "elf32-target.h"