1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
3 Contributed by Axis Communications AB.
4 Written by Hans-Peter Nilsson, based on elf32-fr30.c
5 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 /* Forward declarations. */
30 static reloc_howto_type * cris_reloc_type_lookup
31 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
33 static void cris_info_to_howto_rela
34 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
36 static bfd_reloc_status_type cris_elf_pcrel_reloc
37 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
39 static bfd_boolean cris_elf_grok_prstatus
40 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
42 static bfd_boolean cris_elf_grok_psinfo
43 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
45 static bfd_boolean cris_elf_relocate_section
46 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
47 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
49 static bfd_reloc_status_type cris_final_link_relocate
50 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
51 Elf_Internal_Rela *, bfd_vma));
53 static bfd_boolean cris_elf_gc_sweep_hook
54 PARAMS ((bfd *, struct bfd_link_info *, asection *,
55 const Elf_Internal_Rela *));
57 static asection * cris_elf_gc_mark_hook
58 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
59 struct elf_link_hash_entry *, Elf_Internal_Sym *));
61 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
63 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
65 static bfd_boolean cris_elf_set_mach_from_flags
66 PARAMS ((bfd *, unsigned long int));
68 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
70 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
71 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
73 struct elf_cris_link_hash_entry;
74 static bfd_boolean elf_cris_discard_excess_dso_dynamics
75 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
76 static bfd_boolean elf_cris_discard_excess_program_dynamics
77 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
78 static bfd_boolean elf_cris_adjust_gotplt_to_got
79 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
80 static bfd_boolean elf_cris_try_fold_plt_to_got
81 PARAMS ((struct elf_cris_link_hash_entry *, PTR));
82 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
83 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
84 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
86 static bfd_boolean elf_cris_adjust_dynamic_symbol
87 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
88 static bfd_boolean cris_elf_check_relocs
89 PARAMS ((bfd *, struct bfd_link_info *, asection *,
90 const Elf_Internal_Rela *));
92 static bfd_boolean elf_cris_size_dynamic_sections
93 PARAMS ((bfd *, struct bfd_link_info *));
94 static bfd_boolean elf_cris_finish_dynamic_symbol
95 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
97 static bfd_boolean elf_cris_finish_dynamic_sections
98 PARAMS ((bfd *, struct bfd_link_info *));
99 static void elf_cris_hide_symbol
100 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
101 static enum elf_reloc_type_class elf_cris_reloc_type_class
102 PARAMS ((const Elf_Internal_Rela *));
104 static reloc_howto_type cris_elf_howto_table [] =
106 /* This reloc does nothing. */
107 HOWTO (R_CRIS_NONE, /* type */
109 2, /* size (0 = byte, 1 = short, 2 = long) */
111 FALSE, /* pc_relative */
113 complain_overflow_bitfield, /* complain_on_overflow */
114 bfd_elf_generic_reloc, /* special_function */
115 "R_CRIS_NONE", /* name */
116 FALSE, /* partial_inplace */
119 FALSE), /* pcrel_offset */
121 /* An 8 bit absolute relocation. */
122 HOWTO (R_CRIS_8, /* type */
124 0, /* size (0 = byte, 1 = short, 2 = long) */
126 FALSE, /* pc_relative */
128 complain_overflow_bitfield, /* complain_on_overflow */
129 bfd_elf_generic_reloc, /* special_function */
130 "R_CRIS_8", /* name */
131 FALSE, /* partial_inplace */
132 0x0000, /* src_mask */
133 0x00ff, /* dst_mask */
134 FALSE), /* pcrel_offset */
136 /* A 16 bit absolute relocation. */
137 HOWTO (R_CRIS_16, /* type */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
141 FALSE, /* pc_relative */
143 complain_overflow_bitfield, /* complain_on_overflow */
144 bfd_elf_generic_reloc, /* special_function */
145 "R_CRIS_16", /* name */
146 FALSE, /* partial_inplace */
147 0x00000000, /* src_mask */
148 0x0000ffff, /* dst_mask */
149 FALSE), /* pcrel_offset */
151 /* A 32 bit absolute relocation. */
152 HOWTO (R_CRIS_32, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE, /* pc_relative */
158 complain_overflow_bitfield, /* complain_on_overflow */
159 bfd_elf_generic_reloc, /* special_function */
160 "R_CRIS_32", /* name */
161 FALSE, /* partial_inplace */
162 0x00000000, /* src_mask */
163 0xffffffff, /* dst_mask */
164 FALSE), /* pcrel_offset */
166 /* An 8 bit PC-relative relocation. */
167 HOWTO (R_CRIS_8_PCREL, /* type */
169 0, /* size (0 = byte, 1 = short, 2 = long) */
171 TRUE, /* pc_relative */
173 complain_overflow_bitfield, /* complain_on_overflow */
174 cris_elf_pcrel_reloc, /* special_function */
175 "R_CRIS_8_PCREL", /* name */
176 FALSE, /* partial_inplace */
177 0x0000, /* src_mask */
178 0x00ff, /* dst_mask */
179 TRUE), /* pcrel_offset */
181 /* A 16 bit PC-relative relocation. */
182 HOWTO (R_CRIS_16_PCREL, /* type */
184 1, /* size (0 = byte, 1 = short, 2 = long) */
186 TRUE, /* pc_relative */
188 complain_overflow_bitfield, /* complain_on_overflow */
189 cris_elf_pcrel_reloc, /* special_function */
190 "R_CRIS_16_PCREL", /* name */
191 FALSE, /* partial_inplace */
192 0x00000000, /* src_mask */
193 0x0000ffff, /* dst_mask */
194 TRUE), /* pcrel_offset */
196 /* A 32 bit PC-relative relocation. */
197 HOWTO (R_CRIS_32_PCREL, /* type */
199 2, /* size (0 = byte, 1 = short, 2 = long) */
201 TRUE, /* pc_relative */
203 complain_overflow_bitfield, /* complain_on_overflow */
204 cris_elf_pcrel_reloc, /* special_function */
205 "R_CRIS_32_PCREL", /* name */
206 FALSE, /* partial_inplace */
207 0x00000000, /* src_mask */
208 0xffffffff, /* dst_mask */
209 TRUE), /* pcrel_offset */
211 /* GNU extension to record C++ vtable hierarchy. */
212 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
216 FALSE, /* pc_relative */
218 complain_overflow_dont, /* complain_on_overflow */
219 NULL, /* special_function */
220 "R_CRIS_GNU_VTINHERIT", /* name */
221 FALSE, /* partial_inplace */
224 FALSE), /* pcrel_offset */
226 /* GNU extension to record C++ vtable member usage. */
227 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
229 2, /* size (0 = byte, 1 = short, 2 = long) */
231 FALSE, /* pc_relative */
233 complain_overflow_dont, /* complain_on_overflow */
234 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
235 "R_CRIS_GNU_VTENTRY", /* name */
236 FALSE, /* partial_inplace */
239 FALSE), /* pcrel_offset */
241 /* This is used only by the dynamic linker. The symbol should exist
242 both in the object being run and in some shared library. The
243 dynamic linker copies the data addressed by the symbol from the
244 shared library into the object, because the object being
245 run has to have the data at some particular address. */
246 HOWTO (R_CRIS_COPY, /* type */
248 2, /* size (0 = byte, 1 = short, 2 = long) */
250 FALSE, /* pc_relative */
252 complain_overflow_bitfield, /* complain_on_overflow */
253 bfd_elf_generic_reloc, /* special_function */
254 "R_CRIS_COPY", /* name */
255 FALSE, /* partial_inplace */
258 FALSE), /* pcrel_offset */
260 /* Like R_CRIS_32, but used when setting global offset table entries. */
261 HOWTO (R_CRIS_GLOB_DAT, /* type */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
265 FALSE, /* pc_relative */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_CRIS_GLOB_DAT", /* name */
270 FALSE, /* partial_inplace */
272 0xffffffff, /* dst_mask */
273 FALSE), /* pcrel_offset */
275 /* Marks a procedure linkage table entry for a symbol. */
276 HOWTO (R_CRIS_JUMP_SLOT, /* type */
278 2, /* size (0 = byte, 1 = short, 2 = long) */
280 FALSE, /* pc_relative */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_CRIS_JUMP_SLOT", /* name */
285 FALSE, /* partial_inplace */
288 FALSE), /* pcrel_offset */
290 /* Used only by the dynamic linker. When the object is run, this
291 longword is set to the load address of the object, plus the
293 HOWTO (R_CRIS_RELATIVE, /* type */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
297 FALSE, /* pc_relative */
299 complain_overflow_bitfield, /* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_CRIS_RELATIVE", /* name */
302 FALSE, /* partial_inplace */
304 0xffffffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
307 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
308 HOWTO (R_CRIS_16_GOT, /* type */
310 1, /* size (0 = byte, 1 = short, 2 = long) */
312 FALSE, /* pc_relative */
314 complain_overflow_bitfield, /* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_CRIS_16_GOT", /* name */
317 FALSE, /* partial_inplace */
319 0xffff, /* dst_mask */
320 FALSE), /* pcrel_offset */
322 HOWTO (R_CRIS_32_GOT, /* type */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
326 FALSE, /* pc_relative */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_CRIS_32_GOT", /* name */
331 FALSE, /* partial_inplace */
333 0xffffffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
336 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
337 the GOT table for the symbol. */
338 HOWTO (R_CRIS_16_GOTPLT, /* type */
340 1, /* size (0 = byte, 1 = short, 2 = long) */
342 FALSE, /* pc_relative */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 bfd_elf_generic_reloc, /* special_function */
346 "R_CRIS_16_GOTPLT", /* name */
347 FALSE, /* partial_inplace */
349 0xffff, /* dst_mask */
350 FALSE), /* pcrel_offset */
352 HOWTO (R_CRIS_32_GOTPLT, /* type */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
356 FALSE, /* pc_relative */
358 complain_overflow_bitfield, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_CRIS_32_GOTPLT", /* name */
361 FALSE, /* partial_inplace */
363 0xffffffff, /* dst_mask */
364 FALSE), /* pcrel_offset */
366 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
368 HOWTO (R_CRIS_32_GOTREL, /* type */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
372 FALSE, /* pc_relative */
374 complain_overflow_bitfield, /* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_CRIS_32_GOTREL", /* name */
377 FALSE, /* partial_inplace */
379 0xffffffff, /* dst_mask */
380 FALSE), /* pcrel_offset */
382 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
383 to create PLT entry for symbol. */
384 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
388 FALSE, /* pc_relative */
390 complain_overflow_bitfield, /* complain_on_overflow */
391 bfd_elf_generic_reloc, /* special_function */
392 "R_CRIS_32_PLT_GOTREL", /* name */
393 FALSE, /* partial_inplace */
395 0xffffffff, /* dst_mask */
396 FALSE), /* pcrel_offset */
398 /* A 32-bit offset from PC (location after the relocation) + addend to
399 entry for this symbol in PLT and request to create PLT entry for
401 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
405 TRUE, /* pc_relative */
407 complain_overflow_bitfield, /* complain_on_overflow */
408 cris_elf_pcrel_reloc, /* special_function */
409 "R_CRIS_32_PLT_PCREL", /* name */
410 FALSE, /* partial_inplace */
412 0xffffffff, /* dst_mask */
413 TRUE) /* pcrel_offset */
416 /* Map BFD reloc types to CRIS ELF reloc types. */
418 struct cris_reloc_map
420 bfd_reloc_code_real_type bfd_reloc_val;
421 unsigned int cris_reloc_val;
424 static const struct cris_reloc_map cris_reloc_map [] =
426 { BFD_RELOC_NONE, R_CRIS_NONE },
427 { BFD_RELOC_8, R_CRIS_8 },
428 { BFD_RELOC_16, R_CRIS_16 },
429 { BFD_RELOC_32, R_CRIS_32 },
430 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
431 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
432 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
433 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
434 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
435 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
436 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
437 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
438 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
439 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
440 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
441 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
442 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
443 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
444 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
445 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }
448 static reloc_howto_type *
449 cris_reloc_type_lookup (abfd, code)
450 bfd * abfd ATTRIBUTE_UNUSED;
451 bfd_reloc_code_real_type code;
455 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
456 if (cris_reloc_map [i].bfd_reloc_val == code)
457 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
462 /* Set the howto pointer for an CRIS ELF reloc. */
465 cris_info_to_howto_rela (abfd, cache_ptr, dst)
466 bfd * abfd ATTRIBUTE_UNUSED;
468 Elf_Internal_Rela * dst;
472 r_type = ELF32_R_TYPE (dst->r_info);
473 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
474 cache_ptr->howto = & cris_elf_howto_table [r_type];
477 bfd_reloc_status_type
478 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
479 output_bfd, error_message)
480 bfd *abfd ATTRIBUTE_UNUSED;
481 arelent *reloc_entry;
483 PTR data ATTRIBUTE_UNUSED;
484 asection *input_section;
486 char **error_message ATTRIBUTE_UNUSED;
488 /* By default (using only bfd_elf_generic_reloc when linking to
489 non-ELF formats) PC-relative relocs are relative to the beginning
490 of the reloc. CRIS PC-relative relocs are relative to the position
491 *after* the reloc because that's what pre-CRISv32 PC points to
492 after reading an insn field with that reloc. (For CRISv32, PC is
493 actually relative to the start of the insn, but we keep the old
494 definition.) Still, we use as much generic machinery as we can.
496 Only adjust when doing a final link. */
497 if (output_bfd == (bfd *) NULL)
498 reloc_entry->addend -= 1 << reloc_entry->howto->size;
501 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
502 input_section, output_bfd, error_message);
505 /* Support for core dump NOTE sections.
506 The slightly unintuitive code layout is an attempt to keep at least
507 some similarities with other ports, hoping to simplify general
508 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
511 cris_elf_grok_prstatus (abfd, note)
513 Elf_Internal_Note *note;
518 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
519 switch (note->descsz)
524 case 202: /* Linux/CRISv32 */
526 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
529 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
538 switch (note->descsz)
543 case 214: /* Linux/CRIS */
545 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
548 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
557 /* Make a ".reg/999" section. */
558 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
559 size, note->descpos + offset);
563 cris_elf_grok_psinfo (abfd, note)
565 Elf_Internal_Note *note;
567 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
568 switch (note->descsz)
573 case 124: /* Linux/CRISv32 elf_prpsinfo */
574 elf_tdata (abfd)->core_program
575 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
576 elf_tdata (abfd)->core_command
577 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
580 switch (note->descsz)
585 case 124: /* Linux/CRIS elf_prpsinfo */
586 elf_tdata (abfd)->core_program
587 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
588 elf_tdata (abfd)->core_command
589 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
592 /* Note that for some reason, a spurious space is tacked
593 onto the end of the args in some (at least one anyway)
594 implementations, so strip it off if it exists. */
597 char *command = elf_tdata (abfd)->core_command;
598 int n = strlen (command);
600 if (0 < n && command[n - 1] == ' ')
601 command[n - 1] = '\0';
607 /* The name of the dynamic interpreter. This is put in the .interp
610 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
612 /* The size in bytes of an entry in the procedure linkage table. */
614 #define PLT_ENTRY_SIZE 20
615 #define PLT_ENTRY_SIZE_V32 26
617 /* The first entry in an absolute procedure linkage table looks like this. */
619 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
622 0x7e, 0x7e, /* push mof. */
623 0x7f, 0x0d, /* (dip [pc+]) */
624 0, 0, 0, 0, /* Replaced with address of .got + 4. */
625 0x30, 0x7a, /* move [...],mof */
626 0x7f, 0x0d, /* (dip [pc+]) */
627 0, 0, 0, 0, /* Replaced with address of .got + 8. */
628 0x30, 0x09 /* jump [...] */
631 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
633 0x84, 0xe2, /* subq 4,$sp */
634 0x6f, 0xfe, /* move.d 0,$acr */
635 0, 0, 0, 0, /* Replaced by address of .got + 4. */
636 0x7e, 0x7a, /* move $mof,[$sp] */
637 0x3f, 0x7a, /* move [$acr],$mof */
638 0x04, 0xf2, /* addq 4,acr */
639 0x6f, 0xfa, /* move.d [$acr],$acr */
640 0xbf, 0x09, /* jump $acr */
641 0xb0, 0x05, /* nop */
642 0, 0 /* Pad out to 26 bytes. */
645 /* Subsequent entries in an absolute procedure linkage table look like
648 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
650 0x7f, 0x0d, /* (dip [pc+]) */
651 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
652 0x30, 0x09, /* jump [...] */
653 0x3f, 0x7e, /* move [pc+],mof */
654 0, 0, 0, 0, /* Replaced with offset into relocation table. */
655 0x2f, 0xfe, /* add.d [pc+],pc */
657 0xff, 0xff /* Replaced with offset to start of .plt. */
660 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
662 0x6f, 0xfe, /* move.d 0,$acr */
663 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
664 0x6f, 0xfa, /* move.d [$acr],$acr */
665 0xbf, 0x09, /* jump $acr */
666 0xb0, 0x05, /* nop */
667 0x3f, 0x7e, /* move 0,mof */
668 0, 0, 0, 0, /* Replaced with offset into relocation table. */
669 0xbf, 0x0e, /* ba start_of_plt0_entry */
670 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
674 /* The first entry in a PIC procedure linkage table looks like this. */
676 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
678 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
679 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
680 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
681 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
684 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
686 0x84, 0xe2, /* subq 4,$sp */
687 0x04, 0x01, /* addoq 4,$r0,$acr */
688 0x7e, 0x7a, /* move $mof,[$sp] */
689 0x3f, 0x7a, /* move [$acr],$mof */
690 0x04, 0xf2, /* addq 4,$acr */
691 0x6f, 0xfa, /* move.d [$acr],$acr */
692 0xbf, 0x09, /* jump $acr */
693 0xb0, 0x05, /* nop */
694 0, 0, /* Pad out to 26 bytes. */
699 /* Subsequent entries in a PIC procedure linkage table look like this. */
701 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
703 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
704 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
705 0x30, 0x09, /* jump [...] */
706 0x3f, 0x7e, /* move [pc+],mof */
707 0, 0, 0, 0, /* Replaced with offset into relocation table. */
708 0x2f, 0xfe, /* add.d [pc+],pc */
709 0xec, 0xff, /* Replaced with offset to start of .plt. */
713 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
715 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
716 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
717 0x6f, 0xfa, /* move.d [$acr],$acr */
718 0xbf, 0x09, /* jump $acr */
719 0xb0, 0x05, /* nop */
720 0x3f, 0x7e, /* move relocoffs,$mof */
721 0, 0, 0, 0, /* Replaced with offset into relocation table. */
722 0xbf, 0x0e, /* ba start_of_plt */
723 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
727 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
728 (and most other PIC/shlib stuff). Check that we don't drift away
731 The CRIS linker, like the m68k and i386 linkers (and probably the rest
732 too) needs to keep track of the number of relocs that it decides to
733 copy in check_relocs for each symbol. This is so that it can discard
734 PC relative relocs if it doesn't need them when linking with
735 -Bsymbolic. We store the information in a field extending the regular
736 ELF linker hash table. */
738 /* This structure keeps track of the number of PC relative relocs we have
739 copied for a given symbol. */
741 struct elf_cris_pcrel_relocs_copied
744 struct elf_cris_pcrel_relocs_copied *next;
745 /* A section in dynobj. */
747 /* Number of relocs copied in this section. */
751 /* CRIS ELF linker hash entry. */
753 struct elf_cris_link_hash_entry
755 struct elf_link_hash_entry root;
757 /* Number of PC relative relocs copied for this symbol. */
758 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
760 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
761 both a general GOT and a PLT-specific GOT entry for the same symbol,
762 when it is referenced both as a function and as a function pointer.
764 Number of GOTPLT references for a function. */
765 bfd_signed_vma gotplt_refcount;
767 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
768 (zero is never used as an index). FIXME: We should be able to fold
769 this with gotplt_refcount in a union, like the got and plt unions in
770 elf_link_hash_entry. */
771 bfd_size_type gotplt_offset;
774 /* CRIS ELF linker hash table. */
776 struct elf_cris_link_hash_table
778 struct elf_link_hash_table root;
780 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
781 since we try and avoid creating GOTPLT:s when there's already a GOT.
782 Instead, we keep and update the next available index here. */
783 bfd_size_type next_gotplt_entry;
786 /* Traverse a CRIS ELF linker hash table. */
788 #define elf_cris_link_hash_traverse(table, func, info) \
789 (elf_link_hash_traverse \
791 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
794 /* Get the CRIS ELF linker hash table from a link_info structure. */
796 #define elf_cris_hash_table(p) \
797 ((struct elf_cris_link_hash_table *) (p)->hash)
799 /* Create an entry in a CRIS ELF linker hash table. */
801 static struct bfd_hash_entry *
802 elf_cris_link_hash_newfunc (entry, table, string)
803 struct bfd_hash_entry *entry;
804 struct bfd_hash_table *table;
807 struct elf_cris_link_hash_entry *ret =
808 (struct elf_cris_link_hash_entry *) entry;
810 /* Allocate the structure if it has not already been allocated by a
812 if (ret == (struct elf_cris_link_hash_entry *) NULL)
813 ret = ((struct elf_cris_link_hash_entry *)
814 bfd_hash_allocate (table,
815 sizeof (struct elf_cris_link_hash_entry)));
816 if (ret == (struct elf_cris_link_hash_entry *) NULL)
817 return (struct bfd_hash_entry *) ret;
819 /* Call the allocation method of the superclass. */
820 ret = ((struct elf_cris_link_hash_entry *)
821 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
823 if (ret != (struct elf_cris_link_hash_entry *) NULL)
825 ret->pcrel_relocs_copied = NULL;
826 ret->gotplt_refcount = 0;
827 ret->gotplt_offset = 0;
830 return (struct bfd_hash_entry *) ret;
833 /* Create a CRIS ELF linker hash table. */
835 static struct bfd_link_hash_table *
836 elf_cris_link_hash_table_create (abfd)
839 struct elf_cris_link_hash_table *ret;
840 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
842 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
843 if (ret == (struct elf_cris_link_hash_table *) NULL)
846 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
847 elf_cris_link_hash_newfunc))
853 /* Initialize to skip over the first three entries in the gotplt; they
854 are used for run-time symbol evaluation. */
855 ret->next_gotplt_entry = 12;
857 return &ret->root.root;
860 /* Perform a single relocation. By default we use the standard BFD
861 routines, with a few tweaks. */
863 static bfd_reloc_status_type
864 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
866 reloc_howto_type * howto;
868 asection * input_section;
870 Elf_Internal_Rela * rel;
873 bfd_reloc_status_type r;
875 /* PC-relative relocations are relative to the position *after*
876 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
877 not a single byte, since PC must be 16-bit-aligned. */
878 switch (ELF32_R_TYPE (rel->r_info))
880 /* Check that the 16-bit GOT relocs are positive. */
881 case R_CRIS_16_GOTPLT:
883 if ((bfd_signed_vma) relocation < 0)
884 return bfd_reloc_overflow;
887 case R_CRIS_32_PLT_PCREL:
888 case R_CRIS_32_PCREL:
892 case R_CRIS_16_PCREL:
900 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
901 contents, rel->r_offset,
902 relocation, rel->r_addend);
906 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
907 copied, for further comments. */
910 cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
911 contents, relocs, local_syms, local_sections)
912 bfd *output_bfd ATTRIBUTE_UNUSED;
913 struct bfd_link_info *info;
915 asection *input_section;
917 Elf_Internal_Rela *relocs;
918 Elf_Internal_Sym *local_syms;
919 asection **local_sections;
922 Elf_Internal_Shdr *symtab_hdr;
923 struct elf_link_hash_entry **sym_hashes;
924 bfd_vma *local_got_offsets;
928 Elf_Internal_Rela *rel;
929 Elf_Internal_Rela *relend;
931 if (info->relocatable)
934 dynobj = elf_hash_table (info)->dynobj;
935 local_got_offsets = elf_local_got_offsets (input_bfd);
936 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
937 sym_hashes = elf_sym_hashes (input_bfd);
938 relend = relocs + input_section->reloc_count;
946 splt = bfd_get_section_by_name (dynobj, ".plt");
947 sgot = bfd_get_section_by_name (dynobj, ".got");
950 for (rel = relocs; rel < relend; rel ++)
952 reloc_howto_type *howto;
953 unsigned long r_symndx;
954 Elf_Internal_Sym *sym;
956 struct elf_link_hash_entry *h;
958 bfd_reloc_status_type r;
959 const char *symname = NULL;
962 r_type = ELF32_R_TYPE (rel->r_info);
964 if ( r_type == R_CRIS_GNU_VTINHERIT
965 || r_type == R_CRIS_GNU_VTENTRY)
968 /* This is a final link. */
969 r_symndx = ELF32_R_SYM (rel->r_info);
970 howto = cris_elf_howto_table + r_type;
975 if (r_symndx < symtab_hdr->sh_info)
977 sym = local_syms + r_symndx;
978 sec = local_sections [r_symndx];
979 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
981 symname = (bfd_elf_string_from_elf_section
982 (input_bfd, symtab_hdr->sh_link, sym->st_name));
984 symname = bfd_section_name (input_bfd, sec);
989 bfd_boolean unresolved_reloc;
991 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
992 r_symndx, symtab_hdr, sym_hashes,
994 unresolved_reloc, warned);
997 /* Perhaps we should detect the cases that
998 sec->output_section is expected to be NULL like i386 and
999 m68k, but apparently (and according to elfxx-ia64.c) all
1000 valid cases are where the symbol is defined in a shared
1001 object which we link dynamically against. This includes
1002 PLT relocs for which we've created a PLT entry and other
1003 relocs for which we're prepared to create dynamic
1006 For now, new situations cause us to just err when
1007 sec->output_offset is NULL but the object with the symbol
1008 is *not* dynamically linked against. Thus this will
1009 automatically remind us so we can see if there are other
1010 valid cases we need to revisit. */
1011 && (sec->owner->flags & DYNAMIC) != 0)
1014 else if (h->root.type == bfd_link_hash_defined
1015 || h->root.type == bfd_link_hash_defweak)
1017 /* Here follow the cases where the relocation value must
1018 be zero (or when further handling is simplified when
1019 zero). I can't claim to understand the various
1020 conditions and they weren't described in the files
1021 where I copied them from (elf32-m68k.c and
1022 elf32-i386.c), but let's mention examples of where
1023 they happen. FIXME: Perhaps define and use a
1024 dynamic_symbol_p function like ia64.
1026 - When creating a shared library, we can have an
1027 ordinary relocation for a symbol defined in a shared
1028 library (perhaps the one we create). We then make
1029 the relocation value zero, as the value seen now will
1030 be added into the relocation addend in this shared
1031 library, but must be handled only at dynamic-link
1032 time. FIXME: Not sure this example covers the
1033 h->elf_link_hash_flags test, though it's there in
1036 && ((! info->symbolic && h->dynindx != -1)
1038 && (input_section->flags & SEC_ALLOC) != 0
1039 && (r_type == R_CRIS_8
1040 || r_type == R_CRIS_16
1041 || r_type == R_CRIS_32
1042 || r_type == R_CRIS_8_PCREL
1043 || r_type == R_CRIS_16_PCREL
1044 || r_type == R_CRIS_32_PCREL))
1046 else if (unresolved_reloc)
1049 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1052 cris_elf_howto_table[r_type].name,
1054 bfd_set_error (bfd_error_bad_value);
1062 case R_CRIS_16_GOTPLT:
1063 case R_CRIS_32_GOTPLT:
1064 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1065 but we require a PLT, and the PLT handling will take care of
1066 filling in the PLT-specific GOT entry. For the GOT offset,
1067 calculate it as we do when filling it in for the .got.plt
1068 section. If we don't have a PLT, punt to GOT handling. */
1070 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1073 = bfd_get_section_by_name (dynobj, ".got.plt");
1076 BFD_ASSERT (h->dynindx != -1);
1077 BFD_ASSERT (sgotplt != NULL);
1080 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1082 relocation = got_offset;
1086 /* We didn't make a PLT entry for this symbol. Maybe everything is
1087 folded into the GOT. Other than folding, this happens when
1088 statically linking PIC code, or when using -Bsymbolic. Check
1089 that we instead have a GOT entry as done for us by
1090 elf_cris_adjust_dynamic_symbol, and drop through into the
1091 ordinary GOT cases. This must not happen for the
1092 executable, because any reference it does to a function
1093 that is satisfied by a DSO must generate a PLT. We assume
1094 these call-specific relocs don't address non-functions. */
1096 && (h->got.offset == (bfd_vma) -1
1100 && h->root.type == bfd_link_hash_undefweak)))))
1102 (*_bfd_error_handler)
1103 ((h->got.offset == (bfd_vma) -1)
1104 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1105 " against symbol `%s'")
1106 : _("%B, section %A: No PLT for relocation %s"
1107 " against symbol `%s'"),
1110 cris_elf_howto_table[r_type].name,
1111 (symname != NULL && symname[0] != '\0'
1112 ? symname : _("[whose name is lost]")));
1114 /* FIXME: Perhaps blaming input is not the right thing to
1115 do; this is probably an internal error. But it is true
1116 that we didn't like that particular input. */
1117 bfd_set_error (bfd_error_bad_value);
1122 /* The size of the actual relocation is not used here; we only
1123 fill in the GOT table here. */
1129 /* Note that despite using RELA relocations, the .got contents
1130 is always filled in with the link-relative relocation
1131 value; the addend. */
1135 off = h->got.offset;
1136 BFD_ASSERT (off != (bfd_vma) -1);
1138 if (!elf_hash_table (info)->dynamic_sections_created
1141 || h->type == STT_FUNC
1144 && (info->symbolic || h->dynindx == -1)
1147 /* This wasn't checked above for ! info->shared, but
1148 must hold there if we get here; the symbol must
1149 be defined in the regular program or be undefweak
1150 or be a function or otherwise need a PLT. */
1151 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1154 || h->type == STT_FUNC
1156 || h->root.type == bfd_link_hash_undefweak);
1158 /* This is actually a static link, or it is a
1159 -Bsymbolic link and the symbol is defined locally,
1160 or is undefweak, or the symbol was forced to be
1161 local because of a version file, or we're not
1162 creating a dynamic object. We must initialize this
1163 entry in the global offset table. Since the offset
1164 must always be a multiple of 4, we use the least
1165 significant bit to record whether we have
1166 initialized it already.
1168 If this GOT entry should be runtime-initialized, we
1169 will create a .rela.got relocation entry to
1170 initialize the value. This is done in the
1171 finish_dynamic_symbol routine. */
1176 bfd_put_32 (output_bfd, relocation,
1177 sgot->contents + off);
1184 BFD_ASSERT (local_got_offsets != NULL
1185 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1187 off = local_got_offsets[r_symndx];
1189 /* The offset must always be a multiple of 4. We use
1190 the least significant bit to record whether we have
1191 already generated the necessary reloc. */
1196 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1201 Elf_Internal_Rela outrel;
1204 s = bfd_get_section_by_name (dynobj, ".rela.got");
1205 BFD_ASSERT (s != NULL);
1207 outrel.r_offset = (sgot->output_section->vma
1208 + sgot->output_offset
1210 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1211 outrel.r_addend = relocation;
1213 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1214 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1217 local_got_offsets[r_symndx] |= 1;
1221 relocation = sgot->output_offset + off;
1222 if (rel->r_addend != 0)
1224 /* We can't do anything for a relocation which is against
1225 a symbol *plus offset*. GOT holds relocations for
1226 symbols. Make this an error; the compiler isn't
1227 allowed to pass us these kinds of things. */
1229 (*_bfd_error_handler)
1230 (_("%B, section %A: relocation %s with non-zero addend %d"
1231 " against local symbol"),
1234 cris_elf_howto_table[r_type].name,
1237 (*_bfd_error_handler)
1238 (_("%B, section %A: relocation %s with non-zero addend %d"
1239 " against symbol `%s'"),
1242 cris_elf_howto_table[r_type].name,
1244 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1246 bfd_set_error (bfd_error_bad_value);
1252 case R_CRIS_32_GOTREL:
1253 /* This relocation must only be performed against local symbols.
1254 It's also ok when we link a program and the symbol is either
1255 defined in an ordinary (non-DSO) object or is undefined weak. */
1257 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1261 && h->root.type == bfd_link_hash_undefweak))))
1263 (*_bfd_error_handler)
1264 (_("%B, section %A: relocation %s is"
1265 " not allowed for global symbol: `%s'"),
1268 cris_elf_howto_table[r_type].name,
1270 bfd_set_error (bfd_error_bad_value);
1274 /* This can happen if we get a link error with the input ELF
1275 variant mismatching the output variant. Emit an error so
1276 it's noticed if it happens elsewhere. */
1279 (*_bfd_error_handler)
1280 (_("%B, section %A: relocation %s with no GOT created"),
1283 cris_elf_howto_table[r_type].name);
1284 bfd_set_error (bfd_error_bad_value);
1288 /* This relocation is like a PC-relative one, except the
1289 reference point is the location of GOT. Note that
1290 sgot->output_offset is not involved in this calculation. We
1291 always want the start of entire .got section, not the
1292 position after the reserved header. */
1293 relocation -= sgot->output_section->vma;
1296 case R_CRIS_32_PLT_PCREL:
1297 /* Relocation is to the entry for this symbol in the
1298 procedure linkage table. */
1300 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1301 without using the procedure linkage table. */
1302 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1305 if (h->plt.offset == (bfd_vma) -1
1308 /* We didn't make a PLT entry for this symbol. This
1309 happens when statically linking PIC code, or when
1310 using -Bsymbolic. */
1314 relocation = (splt->output_section->vma
1315 + splt->output_offset
1319 case R_CRIS_32_PLT_GOTREL:
1320 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1321 start of the .got section. See also comment at
1323 relocation -= sgot->output_section->vma;
1325 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1326 without using the procedure linkage table. */
1327 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1330 if (h->plt.offset == (bfd_vma) -1
1333 /* We didn't make a PLT entry for this symbol. This
1334 happens when statically linking PIC code, or when
1335 using -Bsymbolic. */
1339 relocation = (splt->output_section->vma
1340 + splt->output_offset
1342 - sgot->output_section->vma);
1345 case R_CRIS_8_PCREL:
1346 case R_CRIS_16_PCREL:
1347 case R_CRIS_32_PCREL:
1348 /* If the symbol was local, we need no shlib-specific handling. */
1349 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1358 && (input_section->flags & SEC_ALLOC) != 0
1359 && ((r_type != R_CRIS_8_PCREL
1360 && r_type != R_CRIS_16_PCREL
1361 && r_type != R_CRIS_32_PCREL)
1363 || !h->def_regular)))
1365 Elf_Internal_Rela outrel;
1367 bfd_boolean skip, relocate;
1369 /* When generating a shared object, these relocations
1370 are copied into the output file to be resolved at run
1377 name = (bfd_elf_string_from_elf_section
1379 elf_elfheader (input_bfd)->e_shstrndx,
1380 elf_section_data (input_section)->rel_hdr.sh_name));
1384 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1385 && strcmp (bfd_get_section_name (input_bfd,
1389 sreloc = bfd_get_section_by_name (dynobj, name);
1391 /* That section should have been created in
1392 cris_elf_check_relocs, but that function will not be
1393 called for objects which fail in
1394 cris_elf_merge_private_bfd_data. */
1397 (*_bfd_error_handler)
1398 (_("%B: Internal inconsistency; no relocation section %s"),
1402 bfd_set_error (bfd_error_bad_value);
1411 _bfd_elf_section_offset (output_bfd, info, input_section,
1413 if (outrel.r_offset == (bfd_vma) -1)
1415 else if (outrel.r_offset == (bfd_vma) -2)
1416 skip = TRUE, relocate = TRUE;
1417 outrel.r_offset += (input_section->output_section->vma
1418 + input_section->output_offset);
1421 memset (&outrel, 0, sizeof outrel);
1422 /* h->dynindx may be -1 if the symbol was marked to
1425 && ((! info->symbolic && h->dynindx != -1)
1426 || !h->def_regular))
1428 BFD_ASSERT (h->dynindx != -1);
1429 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1430 outrel.r_addend = relocation + rel->r_addend;
1434 if (r_type == R_CRIS_32)
1437 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1438 outrel.r_addend = relocation + rel->r_addend;
1444 if (bfd_is_abs_section (sec))
1446 else if (sec == NULL || sec->owner == NULL)
1448 bfd_set_error (bfd_error_bad_value);
1455 osec = sec->output_section;
1456 indx = elf_section_data (osec)->dynindx;
1457 BFD_ASSERT (indx > 0);
1460 outrel.r_info = ELF32_R_INFO (indx, r_type);
1461 outrel.r_addend = relocation + rel->r_addend;
1465 loc = sreloc->contents;
1466 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1467 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1469 /* This reloc will be computed at runtime, so there's no
1470 need to do anything now, except for R_CRIS_32 relocations
1471 that have been turned into R_CRIS_RELATIVE. */
1479 r = cris_final_link_relocate (howto, input_bfd, input_section,
1480 contents, rel, relocation);
1482 if (r != bfd_reloc_ok)
1484 const char * msg = (const char *) NULL;
1488 case bfd_reloc_overflow:
1489 r = info->callbacks->reloc_overflow
1490 (info, (h ? &h->root : NULL), symname, howto->name,
1491 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1494 case bfd_reloc_undefined:
1495 r = info->callbacks->undefined_symbol
1496 (info, symname, input_bfd, input_section, rel->r_offset,
1500 case bfd_reloc_outofrange:
1501 msg = _("internal error: out of range error");
1504 case bfd_reloc_notsupported:
1505 msg = _("internal error: unsupported relocation error");
1508 case bfd_reloc_dangerous:
1509 msg = _("internal error: dangerous relocation");
1513 msg = _("internal error: unknown error");
1518 r = info->callbacks->warning
1519 (info, msg, symname, input_bfd, input_section, rel->r_offset);
1529 /* Finish up dynamic symbol handling. We set the contents of various
1530 dynamic sections here. */
1533 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
1535 struct bfd_link_info *info;
1536 struct elf_link_hash_entry *h;
1537 Elf_Internal_Sym *sym;
1541 /* Where in the plt entry to put values. */
1542 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
1544 /* What offset to add to the distance to the first PLT entry for the
1545 value at plt_off3. */
1546 int plt_off3_value_bias = 4;
1548 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
1549 for PIC and non-PIC for v32 and pre-v32). */
1550 int plt_stub_offset = 8;
1551 int plt_entry_size = PLT_ENTRY_SIZE;
1552 const bfd_byte *plt_entry = elf_cris_plt_entry;
1553 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
1555 /* Adjust the various PLT entry offsets. */
1556 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1560 plt_off3_value_bias = -2;
1561 plt_stub_offset = 12;
1562 plt_entry_size = PLT_ENTRY_SIZE_V32;
1563 plt_entry = elf_cris_plt_entry_v32;
1564 plt_pic_entry = elf_cris_pic_plt_entry_v32;
1567 dynobj = elf_hash_table (info)->dynobj;
1569 if (h->plt.offset != (bfd_vma) -1)
1577 bfd_vma gotplt_offset
1578 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1579 Elf_Internal_Rela rela;
1581 bfd_boolean has_gotplt = gotplt_offset != 0;
1583 /* Get the index in the procedure linkage table which
1584 corresponds to this symbol. This is the index of this symbol
1585 in all the symbols for which we are making plt entries. The
1586 first entry in the procedure linkage table is reserved. */
1587 /* We have to count backwards here, and the result is only valid as
1588 an index into .got.plt and its relocations. FIXME: Constants... */
1589 bfd_vma gotplt_index = gotplt_offset/4 - 3;
1591 /* Get the offset into the .got table of the entry that corresponds
1592 to this function. Note that we embed knowledge that "incoming"
1593 .got goes after .got.plt in the output without padding (pointer
1594 aligned). However, that knowledge is present in several other
1599 : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
1601 /* This symbol has an entry in the procedure linkage table. Set it
1604 BFD_ASSERT (h->dynindx != -1);
1606 splt = bfd_get_section_by_name (dynobj, ".plt");
1607 sgot = bfd_get_section_by_name (dynobj, ".got");
1608 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1609 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1610 BFD_ASSERT (splt != NULL && sgotplt != NULL
1611 && (! has_gotplt || srela != NULL));
1613 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
1615 /* Fill in the entry in the procedure linkage table. */
1618 memcpy (splt->contents + h->plt.offset, plt_entry,
1621 /* We need to enter the absolute address of the GOT entry here. */
1622 bfd_put_32 (output_bfd, got_base + got_offset,
1623 splt->contents + h->plt.offset + plt_off1);
1627 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
1629 bfd_put_32 (output_bfd, got_offset,
1630 splt->contents + h->plt.offset + plt_off1);
1633 /* Fill in the plt entry and make a relocation, if this is a "real"
1637 /* Fill in the offset to the reloc table. */
1638 bfd_put_32 (output_bfd,
1639 gotplt_index * sizeof (Elf32_External_Rela),
1640 splt->contents + h->plt.offset + plt_off2);
1642 /* Fill in the offset to the first PLT entry, where to "jump". */
1643 bfd_put_32 (output_bfd,
1644 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
1645 splt->contents + h->plt.offset + plt_off3);
1647 /* Fill in the entry in the global offset table with the address of
1648 the relocating stub. */
1649 bfd_put_32 (output_bfd,
1650 (splt->output_section->vma
1651 + splt->output_offset
1654 sgotplt->contents + got_offset);
1656 /* Fill in the entry in the .rela.plt section. */
1657 rela.r_offset = (sgotplt->output_section->vma
1658 + sgotplt->output_offset
1660 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
1662 loc = srela->contents + gotplt_index * sizeof (Elf32_External_Rela);
1663 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1666 if (!h->def_regular)
1668 /* Mark the symbol as undefined, rather than as defined in
1669 the .plt section. Leave the value alone. */
1670 sym->st_shndx = SHN_UNDEF;
1672 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
1673 know whether resetting the value is significant; if it really
1674 is, rather than a quirk or bug in the sparc port, then I
1675 believe we'd see this elsewhere. */
1676 /* If the symbol is weak, we do need to clear the value.
1677 Otherwise, the PLT entry would provide a definition for
1678 the symbol even if the symbol wasn't defined anywhere,
1679 and so the symbol would never be NULL. */
1680 if (!h->ref_regular_nonweak)
1685 /* For an ordinary program, we emit .got relocs only for symbols that
1686 are in the dynamic-symbols table and are either defined by the
1687 program or are undefined weak symbols, or are function symbols
1688 where we do not output a PLT: the PLT reloc was output above and all
1689 references to the function symbol are redirected to the PLT. */
1690 if (h->got.offset != (bfd_vma) -1
1692 || (h->dynindx != -1
1693 && h->plt.offset == (bfd_vma) -1
1695 && h->root.type != bfd_link_hash_undefweak)))
1699 Elf_Internal_Rela rela;
1703 /* This symbol has an entry in the global offset table. Set it up. */
1705 sgot = bfd_get_section_by_name (dynobj, ".got");
1706 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1707 BFD_ASSERT (sgot != NULL && srela != NULL);
1709 rela.r_offset = (sgot->output_section->vma
1710 + sgot->output_offset
1711 + (h->got.offset &~ (bfd_vma) 1));
1713 /* If this is a static link, or it is a -Bsymbolic link and the
1714 symbol is defined locally or was forced to be local because
1715 of a version file, we just want to emit a RELATIVE reloc.
1716 The entry in the global offset table will already have been
1717 initialized in the relocate_section function. */
1718 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
1719 if (! elf_hash_table (info)->dynamic_sections_created
1721 && (info->symbolic || h->dynindx == -1)
1724 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1725 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
1729 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
1730 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
1734 loc = srela->contents;
1735 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1736 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1742 Elf_Internal_Rela rela;
1745 /* This symbol needs a copy reloc. Set it up. */
1747 BFD_ASSERT (h->dynindx != -1
1748 && (h->root.type == bfd_link_hash_defined
1749 || h->root.type == bfd_link_hash_defweak));
1751 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1753 BFD_ASSERT (s != NULL);
1755 rela.r_offset = (h->root.u.def.value
1756 + h->root.u.def.section->output_section->vma
1757 + h->root.u.def.section->output_offset);
1758 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
1760 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1761 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1764 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1765 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1766 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1767 sym->st_shndx = SHN_ABS;
1772 /* Finish up the dynamic sections. */
1775 elf_cris_finish_dynamic_sections (output_bfd, info)
1777 struct bfd_link_info *info;
1783 dynobj = elf_hash_table (info)->dynobj;
1785 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1786 BFD_ASSERT (sgot != NULL);
1787 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1789 if (elf_hash_table (info)->dynamic_sections_created)
1792 Elf32_External_Dyn *dyncon, *dynconend;
1794 splt = bfd_get_section_by_name (dynobj, ".plt");
1795 BFD_ASSERT (splt != NULL && sdyn != NULL);
1797 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1798 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1799 for (; dyncon < dynconend; dyncon++)
1801 Elf_Internal_Dyn dyn;
1804 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1812 s = bfd_get_section_by_name (output_bfd, ".got");
1813 BFD_ASSERT (s != NULL);
1814 dyn.d_un.d_ptr = s->vma;
1815 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1819 /* Yes, we *can* have a .plt and no .plt.rela, for instance
1820 if all symbols are found in the .got (not .got.plt). */
1821 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1822 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
1823 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1827 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1831 dyn.d_un.d_val = s->size;
1832 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1836 /* The procedure linkage table relocs (DT_JMPREL) should
1837 not be included in the overall relocs (DT_RELA).
1838 Therefore, we override the DT_RELASZ entry here to
1839 make it not include the JMPREL relocs. Since the
1840 linker script arranges for .rela.plt to follow all
1841 other relocation sections, we don't have to worry
1842 about changing the DT_RELA entry. */
1843 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1845 dyn.d_un.d_val -= s->size;
1846 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1851 /* Fill in the first entry in the procedure linkage table. */
1854 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1857 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
1858 PLT_ENTRY_SIZE_V32);
1861 memcpy (splt->contents, elf_cris_plt0_entry_v32,
1862 PLT_ENTRY_SIZE_V32);
1863 bfd_put_32 (output_bfd,
1864 sgot->output_section->vma
1865 + sgot->output_offset + 4,
1866 splt->contents + 4);
1868 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1869 = PLT_ENTRY_SIZE_V32;
1875 memcpy (splt->contents, elf_cris_pic_plt0_entry,
1879 memcpy (splt->contents, elf_cris_plt0_entry,
1881 bfd_put_32 (output_bfd,
1882 sgot->output_section->vma
1883 + sgot->output_offset + 4,
1884 splt->contents + 6);
1885 bfd_put_32 (output_bfd,
1886 sgot->output_section->vma
1887 + sgot->output_offset + 8,
1888 splt->contents + 14);
1890 elf_section_data (splt->output_section)->this_hdr.sh_entsize
1897 /* Fill in the first three entries in the global offset table. */
1901 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1903 bfd_put_32 (output_bfd,
1904 sdyn->output_section->vma + sdyn->output_offset,
1906 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1907 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1910 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1915 /* Return the section that should be marked against GC for a given
1919 cris_elf_gc_mark_hook (sec, info, rel, h, sym)
1921 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1922 Elf_Internal_Rela *rel;
1923 struct elf_link_hash_entry *h;
1924 Elf_Internal_Sym *sym;
1928 switch (ELF32_R_TYPE (rel->r_info))
1930 case R_CRIS_GNU_VTINHERIT:
1931 case R_CRIS_GNU_VTENTRY:
1935 switch (h->root.type)
1937 case bfd_link_hash_defined:
1938 case bfd_link_hash_defweak:
1939 return h->root.u.def.section;
1941 case bfd_link_hash_common:
1942 return h->root.u.c.p->section;
1950 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1955 /* Update the got entry reference counts for the section being removed. */
1958 cris_elf_gc_sweep_hook (abfd, info, sec, relocs)
1959 bfd *abfd ATTRIBUTE_UNUSED;
1960 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1961 asection *sec ATTRIBUTE_UNUSED;
1962 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
1964 Elf_Internal_Shdr *symtab_hdr;
1965 struct elf_link_hash_entry **sym_hashes;
1966 bfd_signed_vma *local_got_refcounts;
1967 const Elf_Internal_Rela *rel, *relend;
1972 dynobj = elf_hash_table (info)->dynobj;
1976 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1977 sym_hashes = elf_sym_hashes (abfd);
1978 local_got_refcounts = elf_local_got_refcounts (abfd);
1980 sgot = bfd_get_section_by_name (dynobj, ".got");
1981 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1983 relend = relocs + sec->reloc_count;
1984 for (rel = relocs; rel < relend; rel++)
1986 unsigned long r_symndx;
1987 struct elf_link_hash_entry *h;
1989 switch (ELF32_R_TYPE (rel->r_info))
1993 r_symndx = ELF32_R_SYM (rel->r_info);
1994 if (r_symndx >= symtab_hdr->sh_info)
1996 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1997 if (h->got.refcount > 0)
2000 if (h->got.refcount == 0)
2002 /* We don't need the .got entry any more. */
2004 srelgot->size -= sizeof (Elf32_External_Rela);
2011 if (local_got_refcounts != NULL)
2013 if (local_got_refcounts[r_symndx] > 0)
2015 --local_got_refcounts[r_symndx];
2016 if (local_got_refcounts[r_symndx] == 0)
2018 /* We don't need the .got entry any more. */
2021 srelgot->size -= sizeof (Elf32_External_Rela);
2027 case R_CRIS_16_GOTPLT:
2028 case R_CRIS_32_GOTPLT:
2029 /* For local symbols, treat these like GOT relocs. */
2030 r_symndx = ELF32_R_SYM (rel->r_info);
2031 if (r_symndx < symtab_hdr->sh_info)
2032 goto local_got_reloc;
2034 case R_CRIS_32_PLT_GOTREL:
2035 /* FIXME: We don't garbage-collect away the .got section. */
2036 if (local_got_refcounts != NULL)
2037 local_got_refcounts[-1]--;
2039 case R_CRIS_8_PCREL:
2040 case R_CRIS_16_PCREL:
2041 case R_CRIS_32_PCREL:
2042 case R_CRIS_32_PLT_PCREL:
2043 r_symndx = ELF32_R_SYM (rel->r_info);
2044 if (r_symndx >= symtab_hdr->sh_info)
2046 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2047 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2048 && h->plt.refcount > 0)
2061 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2062 entry but we found we will not create any. Called when we find we will
2063 not have any PLT for this symbol, by for example
2064 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2065 or elf_cris_size_dynamic_sections if no dynamic sections will be
2066 created (we're only linking static objects). */
2069 elf_cris_adjust_gotplt_to_got (h, p)
2070 struct elf_cris_link_hash_entry *h;
2073 struct bfd_link_info *info = (struct bfd_link_info *) p;
2074 bfd *dynobj = elf_hash_table (info)->dynobj;
2076 BFD_ASSERT (dynobj != NULL);
2078 if (h->root.root.type == bfd_link_hash_warning)
2079 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2081 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2082 if (h->gotplt_refcount <= 0)
2085 if (h->root.got.refcount > 0)
2087 /* There's a GOT entry for this symbol. Just adjust the refcount.
2088 Probably not necessary at this stage, but keeping it accurate
2089 helps avoiding surprises later. */
2090 h->root.got.refcount += h->gotplt_refcount;
2091 h->gotplt_refcount = 0;
2095 /* No GOT entry for this symbol. We need to create one. */
2096 asection *sgot = bfd_get_section_by_name (dynobj, ".got");
2098 = bfd_get_section_by_name (dynobj, ".rela.got");
2100 /* Put an accurate refcount there. */
2101 h->root.got.refcount = h->gotplt_refcount;
2103 h->gotplt_refcount = 0;
2105 /* We always have a .got and a .rela.got section if there were
2106 GOTPLT relocs in input. */
2107 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2109 /* Allocate space in the .got section. */
2112 /* Allocate relocation space. */
2113 srelgot->size += sizeof (Elf32_External_Rela);
2119 /* Try to fold PLT entries with GOT entries. There are two cases when we
2122 - When all PLT references are GOTPLT references, and there are GOT
2123 references, and this is not the executable. We don't have to
2124 generate a PLT at all.
2126 - When there are both (ordinary) PLT references and GOT references,
2127 and this isn't the executable.
2128 We want to make the PLT reference use the ordinary GOT entry rather
2129 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2130 since the GOT entry will have to be resolved at startup anyway.
2132 Though the latter case is handled when room for the PLT is allocated,
2135 By folding into the GOT, we may need a round-trip to a PLT in the
2136 executable for calls, a loss in performance. Still, losing a
2137 reloc is a win in size and at least in start-up time.
2139 Note that this function is called before symbols are forced local by
2140 version scripts. The differing cases are handled by
2141 elf_cris_hide_symbol. */
2144 elf_cris_try_fold_plt_to_got (h, p)
2145 struct elf_cris_link_hash_entry *h;
2148 struct bfd_link_info *info = (struct bfd_link_info *) p;
2150 /* If there are no GOT references for this symbol, we can't fold any
2151 other reference so there's nothing to do. Likewise if there are no
2152 PLT references; GOTPLT references included. */
2153 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2156 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2157 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2159 if (h->gotplt_refcount == h->root.plt.refcount)
2161 /* The only PLT references are GOTPLT references, and there are GOT
2162 references. Convert PLT to GOT references. */
2163 if (! elf_cris_adjust_gotplt_to_got (h, info))
2166 /* Clear the PLT references, so no PLT will be created. */
2167 h->root.plt.offset = (bfd_vma) -1;
2173 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2174 to use a GOT entry (and create one) rather than requiring a GOTPLT
2178 elf_cris_hide_symbol (info, h, force_local)
2179 struct bfd_link_info *info;
2180 struct elf_link_hash_entry *h;
2181 bfd_boolean force_local;
2183 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2185 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2188 /* Adjust a symbol defined by a dynamic object and referenced by a
2189 regular object. The current definition is in some section of the
2190 dynamic object, but we're not including those sections. We have to
2191 change the definition to something the rest of the link can
2195 elf_cris_adjust_dynamic_symbol (info, h)
2196 struct bfd_link_info *info;
2197 struct elf_link_hash_entry *h;
2201 unsigned int power_of_two;
2202 bfd_size_type plt_entry_size;
2204 dynobj = elf_hash_table (info)->dynobj;
2206 /* Make sure we know what is going on here. */
2207 BFD_ASSERT (dynobj != NULL
2209 || h->u.weakdef != NULL
2212 && !h->def_regular)));
2215 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2216 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2218 /* If this is a function, put it in the procedure linkage table. We
2219 will fill in the contents of the procedure linkage table later,
2220 when we know the address of the .got section. */
2221 if (h->type == STT_FUNC
2224 /* If we link a program (not a DSO), we'll get rid of unnecessary
2225 PLT entries; we point to the actual symbols -- even for pic
2226 relocs, because a program built with -fpic should have the same
2227 result as one built without -fpic, specifically considering weak
2229 FIXME: m68k and i386 differ here, for unclear reasons. */
2233 /* This case can occur if we saw a PLT reloc in an input file,
2234 but the symbol was not defined by a dynamic object. In such
2235 a case, we don't actually need to build a procedure linkage
2236 table, and we can just do an absolute or PC reloc instead, or
2237 change a .got.plt index to a .got index for GOTPLT relocs. */
2238 BFD_ASSERT (h->needs_plt);
2240 h->plt.offset = (bfd_vma) -1;
2242 elf_cris_adjust_gotplt_to_got ((struct
2243 elf_cris_link_hash_entry *) h,
2247 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2248 where a pointer-equivalent symbol was unimportant (i.e. more
2249 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2250 of the PLT. We can't for the executable, because the GOT
2251 entries will point to the PLT there (and be constant). */
2253 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2257 /* GC or folding may have rendered this entry unused. */
2258 if (h->plt.refcount <= 0)
2261 h->plt.offset = (bfd_vma) -1;
2265 /* Make sure this symbol is output as a dynamic symbol. */
2266 if (h->dynindx == -1)
2268 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2272 s = bfd_get_section_by_name (dynobj, ".plt");
2273 BFD_ASSERT (s != NULL);
2275 /* If this is the first .plt entry, make room for the special
2278 s->size += plt_entry_size;
2280 /* If this symbol is not defined in a regular file, and we are
2281 not generating a shared library, then set the symbol to this
2282 location in the .plt. */
2286 h->root.u.def.section = s;
2287 h->root.u.def.value = s->size;
2290 /* If there's already a GOT entry, use that, not a .got.plt. A
2291 GOT field still has a reference count when we get here; it's
2292 not yet changed to an offset. We can't do this for an
2293 executable, because then the reloc associated with the PLT
2294 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2295 this to elf_cris_try_fold_plt_to_got. */
2296 if (info->shared && h->got.refcount > 0)
2298 h->got.refcount += h->plt.refcount;
2300 /* Mark the PLT offset to use the GOT entry by setting the low
2301 bit in the plt offset; it is always a multiple of
2302 plt_entry_size (which is at least a multiple of 2). */
2303 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2305 /* Change the PLT refcount to an offset. */
2306 h->plt.offset = s->size;
2308 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2309 that the got entry should be used instead. */
2310 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2311 h)->gotplt_offset == 0);
2313 /* Make room for this entry. */
2314 s->size += plt_entry_size;
2319 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2320 h->plt.offset = s->size;
2322 /* Make room for this entry. */
2323 s->size += plt_entry_size;
2325 /* We also need to make an entry in the .got.plt section, which
2326 will be placed in the .got section by the linker script. */
2327 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2328 = elf_cris_hash_table (info)->next_gotplt_entry;
2329 elf_cris_hash_table (info)->next_gotplt_entry += 4;
2331 s = bfd_get_section_by_name (dynobj, ".got.plt");
2332 BFD_ASSERT (s != NULL);
2335 /* We also need to make an entry in the .rela.plt section. */
2337 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2338 BFD_ASSERT (s != NULL);
2339 s->size += sizeof (Elf32_External_Rela);
2344 /* Reinitialize the plt offset now that it is not used as a reference
2346 h->plt.offset = (bfd_vma) -1;
2348 /* If this is a weak symbol, and there is a real definition, the
2349 processor independent code will have arranged for us to see the
2350 real definition first, and we can just use the same value. */
2351 if (h->u.weakdef != NULL)
2353 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2354 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2355 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2356 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2360 /* This is a reference to a symbol defined by a dynamic object which
2361 is not a function. */
2363 /* If we are creating a shared library, we must presume that the
2364 only references to the symbol are via the global offset table.
2365 For such cases we need not do anything here; the relocations will
2366 be handled correctly by relocate_section. */
2370 /* If there are no references to this symbol that do not use the
2371 GOT, we don't need to generate a copy reloc. */
2372 if (!h->non_got_ref)
2375 /* We must allocate the symbol in our .dynbss section, which will
2376 become part of the .bss section of the executable. There will be
2377 an entry for this symbol in the .dynsym section. The dynamic
2378 object will contain position independent code, so all references
2379 from the dynamic object to this symbol will go through the global
2380 offset table. The dynamic linker will use the .dynsym entry to
2381 determine the address it must put in the global offset table, so
2382 both the dynamic object and the regular object will refer to the
2383 same memory location for the variable. */
2385 s = bfd_get_section_by_name (dynobj, ".dynbss");
2386 BFD_ASSERT (s != NULL);
2388 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2389 copy the initial value out of the dynamic object and into the
2390 runtime process image. We need to remember the offset into the
2391 .rela.bss section we are going to use. */
2392 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2396 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
2397 BFD_ASSERT (srel != NULL);
2398 srel->size += sizeof (Elf32_External_Rela);
2402 /* Historic precedent: m68k and i386 allow max 8-byte alignment for the
2403 thing to copy; so do we. */
2405 /* We need to figure out the alignment required for this symbol. I
2406 have no idea how ELF linkers handle this. */
2407 power_of_two = bfd_log2 (h->size);
2408 if (power_of_two > 3)
2411 /* Apply the required alignment. */
2412 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
2413 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2415 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
2419 /* Define the symbol as being at this point in the section. */
2420 h->root.u.def.section = s;
2421 h->root.u.def.value = s->size;
2423 /* Increment the section size to make room for the symbol. */
2429 /* Look through the relocs for a section during the first phase. */
2432 cris_elf_check_relocs (abfd, info, sec, relocs)
2434 struct bfd_link_info *info;
2436 const Elf_Internal_Rela *relocs;
2439 Elf_Internal_Shdr *symtab_hdr;
2440 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2441 bfd_signed_vma *local_got_refcounts;
2442 const Elf_Internal_Rela *rel;
2443 const Elf_Internal_Rela *rel_end;
2448 if (info->relocatable)
2451 dynobj = elf_hash_table (info)->dynobj;
2452 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2453 sym_hashes = elf_sym_hashes (abfd);
2454 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
2455 local_got_refcounts = elf_local_got_refcounts (abfd);
2461 if (!elf_bad_symtab (abfd))
2462 sym_hashes_end -= symtab_hdr->sh_info;
2464 rel_end = relocs + sec->reloc_count;
2465 for (rel = relocs; rel < rel_end; rel++)
2467 struct elf_link_hash_entry *h;
2468 unsigned long r_symndx;
2469 enum elf_cris_reloc_type r_type;
2471 r_symndx = ELF32_R_SYM (rel->r_info);
2472 if (r_symndx < symtab_hdr->sh_info)
2475 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2477 r_type = ELF32_R_TYPE (rel->r_info);
2479 /* Some relocs require linker-created sections; we need to hang them
2480 on the first input bfd we found that contained dynamic relocs. */
2485 case R_CRIS_32_GOTREL:
2486 case R_CRIS_32_PLT_GOTREL:
2487 case R_CRIS_32_PLT_PCREL:
2488 case R_CRIS_16_GOTPLT:
2489 case R_CRIS_32_GOTPLT:
2492 elf_hash_table (info)->dynobj = dynobj = abfd;
2494 /* We could handle this if we can get a handle on the
2495 output bfd in elf_cris_adjust_dynamic_symbol. Failing
2496 that, we must insist on dynobj being a specific mach. */
2497 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
2499 (*_bfd_error_handler)
2500 (_("%B, section %A:\n v10/v32 compatible object %s"
2501 " must not contain a PIC relocation"),
2506 /* Create the .got section, so we can assume it's always
2507 present whenever there's a dynobj. */
2508 if (!_bfd_elf_create_got_section (dynobj, info))
2517 /* Some relocs require a global offset table (but perhaps not a
2518 specific GOT entry). */
2521 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
2522 entry only for local symbols. Unfortunately, we don't know
2523 until later on if there's a version script that forces the
2524 symbol local. We must have the .rela.got section in place
2525 before we know if the symbol looks global now, so we need
2526 to treat the reloc just like for R_CRIS_16_GOT and
2528 case R_CRIS_16_GOTPLT:
2529 case R_CRIS_32_GOTPLT:
2533 && (h != NULL || info->shared))
2535 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2536 if (srelgot == NULL)
2538 srelgot = bfd_make_section (dynobj, ".rela.got");
2540 || !bfd_set_section_flags (dynobj, srelgot,
2545 | SEC_LINKER_CREATED
2547 || !bfd_set_section_alignment (dynobj, srelgot, 2))
2553 case R_CRIS_32_GOTREL:
2554 case R_CRIS_32_PLT_GOTREL:
2556 sgot = bfd_get_section_by_name (dynobj, ".got");
2558 if (local_got_refcounts == NULL)
2562 /* We use index local_got_refcounts[-1] to count all
2563 GOT-relative relocations that do not have explicit
2565 amt = symtab_hdr->sh_info + 1;
2566 amt *= sizeof (bfd_signed_vma);
2567 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
2568 if (local_got_refcounts == NULL)
2571 local_got_refcounts++;
2572 elf_local_got_refcounts (abfd) = local_got_refcounts;
2582 case R_CRIS_16_GOTPLT:
2583 case R_CRIS_32_GOTPLT:
2584 /* Mark that we need a GOT entry if the PLT entry (and its GOT
2585 entry) is eliminated. We can only do this for a non-local
2589 ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++;
2590 goto handle_gotplt_reloc;
2592 /* If h is NULL then this is a local symbol, and we must make a
2593 GOT entry for it, so handle it like a GOT reloc. */
2598 /* This symbol requires a global offset table entry. */
2601 if (h->got.refcount == 0)
2603 /* Make sure this symbol is output as a dynamic symbol. */
2604 if (h->dynindx == -1)
2606 if (!bfd_elf_link_record_dynamic_symbol (info, h))
2610 /* Allocate space in the .got section. */
2612 /* Allocate relocation space. */
2613 srelgot->size += sizeof (Elf32_External_Rela);
2619 /* This is a global offset table entry for a local symbol. */
2620 if (local_got_refcounts[r_symndx] == 0)
2625 /* If we are generating a shared object, we need to
2626 output a R_CRIS_RELATIVE reloc so that the dynamic
2627 linker can adjust this GOT entry. */
2628 srelgot->size += sizeof (Elf32_External_Rela);
2631 local_got_refcounts[r_symndx]++;
2635 case R_CRIS_32_GOTREL:
2636 /* This reference requires a global offset table.
2637 FIXME: The actual refcount isn't used currently; the .got
2638 section can't be removed if there were any references in the
2640 local_got_refcounts[-1]++;
2643 handle_gotplt_reloc:
2645 case R_CRIS_32_PLT_GOTREL:
2646 /* This reference requires a global offset table. */
2647 local_got_refcounts[-1]++;
2650 case R_CRIS_32_PLT_PCREL:
2651 /* This symbol requires a procedure linkage table entry. We
2652 actually build the entry in adjust_dynamic_symbol,
2653 because this might be a case of linking PIC code which is
2654 never referenced by a dynamic object, in which case we
2655 don't need to generate a procedure linkage table entry
2658 /* Beware: if we'd check for visibility of the symbol here
2659 (and not marking the need for a PLT when non-visible), we'd
2660 get into trouble with keeping handling consistent with
2661 regards to relocs found before definition and GOTPLT
2662 handling. Eliminable PLT entries will be dealt with later
2674 /* Let's help debug shared library creation. Any of these
2675 relocs can be used in shared libs, but pages containing them
2676 cannot be shared. Don't warn for sections we don't care
2677 about, such as debug sections or non-constant sections. We
2678 can't help tables of (global) function pointers, for example,
2679 though they must be emitted in a data section to avoid having
2680 impure text sections. */
2682 && (sec->flags & SEC_ALLOC) != 0
2683 && (sec->flags & SEC_READONLY) != 0)
2685 /* FIXME: How do we make this optionally a warning only? */
2686 (*_bfd_error_handler)
2687 (_("%B, section %A:\n relocation %s should not"
2688 " be used in a shared object; recompile with -fPIC"),
2691 cris_elf_howto_table[r_type].name);
2695 case R_CRIS_8_PCREL:
2696 case R_CRIS_16_PCREL:
2697 case R_CRIS_32_PCREL:
2702 /* Make sure a plt entry is created for this symbol if it
2703 turns out to be a function defined by a dynamic object. */
2704 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2708 /* If we are creating a shared library and this is not a local
2709 symbol, we need to copy the reloc into the shared library.
2710 However when linking with -Bsymbolic and this is a global
2711 symbol which is defined in an object we are including in the
2712 link (i.e., DEF_REGULAR is set), then we can resolve the
2713 reloc directly. At this point we have not seen all the input
2714 files, so it is possible that DEF_REGULAR is not set now but
2715 will be set later (it is never cleared). In case of a weak
2716 definition, DEF_REGULAR may be cleared later by a strong
2717 definition in a shared library. We account for that
2718 possibility below by storing information in the relocs_copied
2719 field of the hash table entry. A similar situation occurs
2720 when creating shared libraries and symbol visibility changes
2721 render the symbol local. */
2723 /* No need to do anything if we're not creating a shared object. */
2727 /* We don't need to handle relocs into sections not going into
2728 the "real" output. */
2729 if ((sec->flags & SEC_ALLOC) == 0)
2732 /* We can only eliminate PC-relative relocs. */
2733 if (r_type == R_CRIS_8_PCREL
2734 || r_type == R_CRIS_16_PCREL
2735 || r_type == R_CRIS_32_PCREL)
2737 /* If the symbol is local, then we can eliminate the reloc. */
2738 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2741 /* If this is with -Bsymbolic and the symbol isn't weak, and
2742 is defined by an ordinary object (the ones we include in
2743 this shared library) then we can also eliminate the
2744 reloc. See comment above for more eliminable cases which
2745 we can't identify at this time. */
2747 && h->root.type != bfd_link_hash_defweak
2751 if ((sec->flags & SEC_READONLY) != 0)
2753 /* FIXME: How do we make this optionally a warning only? */
2754 (*_bfd_error_handler)
2755 (_("%B, section %A:\n relocation %s should not be used"
2756 " in a shared object; recompile with -fPIC"),
2759 cris_elf_howto_table[r_type].name);
2763 /* We create a reloc section in dynobj and make room for this
2769 name = (bfd_elf_string_from_elf_section
2771 elf_elfheader (abfd)->e_shstrndx,
2772 elf_section_data (sec)->rel_hdr.sh_name));
2776 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2777 && strcmp (bfd_get_section_name (abfd, sec),
2780 sreloc = bfd_get_section_by_name (dynobj, name);
2783 sreloc = bfd_make_section (dynobj, name);
2785 || !bfd_set_section_flags (dynobj, sreloc,
2790 | SEC_LINKER_CREATED
2792 || !bfd_set_section_alignment (dynobj, sreloc, 2))
2795 if (sec->flags & SEC_READONLY)
2796 info->flags |= DF_TEXTREL;
2799 sreloc->size += sizeof (Elf32_External_Rela);
2801 /* If we are linking with -Bsymbolic, we count the number of PC
2802 relative relocations we have entered for this symbol, so that
2803 we can discard them again if the symbol is later defined by a
2804 regular object. We know that h is really a pointer to an
2805 elf_cris_link_hash_entry. */
2806 if ((r_type == R_CRIS_8_PCREL
2807 || r_type == R_CRIS_16_PCREL
2808 || r_type == R_CRIS_32_PCREL)
2811 struct elf_cris_link_hash_entry *eh;
2812 struct elf_cris_pcrel_relocs_copied *p;
2814 eh = (struct elf_cris_link_hash_entry *) h;
2816 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2817 if (p->section == sreloc)
2822 p = ((struct elf_cris_pcrel_relocs_copied *)
2823 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2826 p->next = eh->pcrel_relocs_copied;
2827 eh->pcrel_relocs_copied = p;
2828 p->section = sreloc;
2836 /* This relocation describes the C++ object vtable hierarchy.
2837 Reconstruct it for later use during GC. */
2838 case R_CRIS_GNU_VTINHERIT:
2839 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2843 /* This relocation describes which C++ vtable entries are actually
2844 used. Record for later use during GC. */
2845 case R_CRIS_GNU_VTENTRY:
2846 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2851 /* Other relocs do not appear here. */
2852 bfd_set_error (bfd_error_bad_value);
2860 /* Set the sizes of the dynamic sections. */
2863 elf_cris_size_dynamic_sections (output_bfd, info)
2864 bfd *output_bfd ATTRIBUTE_UNUSED;
2865 struct bfd_link_info *info;
2872 dynobj = elf_hash_table (info)->dynobj;
2873 BFD_ASSERT (dynobj != NULL);
2875 if (elf_hash_table (info)->dynamic_sections_created)
2877 /* Set the contents of the .interp section to the interpreter. */
2878 if (info->executable)
2880 s = bfd_get_section_by_name (dynobj, ".interp");
2881 BFD_ASSERT (s != NULL);
2882 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2883 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2888 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
2889 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2890 elf_cris_adjust_gotplt_to_got,
2893 /* We may have created entries in the .rela.got section.
2894 However, if we are not creating the dynamic sections, we will
2895 not actually use these entries. Reset the size of .rela.got,
2896 which will cause it to get stripped from the output file
2898 s = bfd_get_section_by_name (dynobj, ".rela.got");
2903 /* If this is a -Bsymbolic shared link, then we need to discard all PC
2904 relative relocs against symbols defined in a regular object. We
2905 allocated space for them in the check_relocs routine, but we will not
2906 fill them in in the relocate_section routine. We also discard space
2907 for relocs that have become for local symbols due to symbol
2908 visibility changes. For programs, we discard space for relocs for
2909 symbols not referenced by any dynamic object. */
2911 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2912 elf_cris_discard_excess_dso_dynamics,
2915 elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2916 elf_cris_discard_excess_program_dynamics,
2919 /* The check_relocs and adjust_dynamic_symbol entry points have
2920 determined the sizes of the various dynamic sections. Allocate
2924 for (s = dynobj->sections; s != NULL; s = s->next)
2929 if ((s->flags & SEC_LINKER_CREATED) == 0)
2932 /* It's OK to base decisions on the section name, because none
2933 of the dynobj section names depend upon the input files. */
2934 name = bfd_get_section_name (dynobj, s);
2938 if (strcmp (name, ".plt") == 0)
2942 /* Strip this section if we don't need it; see the
2948 /* Remember whether there is a PLT. */
2952 else if (strncmp (name, ".rela", 5) == 0)
2956 /* If we don't need this section, strip it from the
2957 output file. This is mostly to handle .rela.bss and
2958 .rela.plt. We must create both sections in
2959 create_dynamic_sections, because they must be created
2960 before the linker maps input sections to output
2961 sections. The linker does that before
2962 adjust_dynamic_symbol is called, and it is that
2963 function which decides whether anything needs to go
2964 into these sections. */
2969 /* Remember whether there are any reloc sections other
2971 if (strcmp (name, ".rela.plt") != 0)
2974 /* We use the reloc_count field as a counter if we need
2975 to copy relocs into the output file. */
2979 else if (strncmp (name, ".got", 4) != 0)
2981 /* It's not one of our sections, so don't allocate space. */
2987 _bfd_strip_section_from_output (info, s);
2991 /* Allocate memory for the section contents. We use bfd_zalloc here
2992 in case unused entries are not reclaimed before the section's
2993 contents are written out. This should not happen, but this way
2994 if it does, we will not write out garbage. For reloc sections,
2995 this will make entries have the type R_CRIS_NONE. */
2996 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2997 if (s->contents == NULL && s->size != 0)
3001 if (elf_hash_table (info)->dynamic_sections_created)
3003 /* Add some entries to the .dynamic section. We fill in the
3004 values later, in elf_cris_finish_dynamic_sections, but we
3005 must add the entries now so that we get the correct size for
3006 the .dynamic section. The DT_DEBUG entry is filled in by the
3007 dynamic linker and used by the debugger. */
3008 #define add_dynamic_entry(TAG, VAL) \
3009 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3013 if (!add_dynamic_entry (DT_DEBUG, 0))
3019 if (!add_dynamic_entry (DT_PLTGOT, 0)
3020 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3021 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3022 || !add_dynamic_entry (DT_JMPREL, 0))
3028 if (!add_dynamic_entry (DT_RELA, 0)
3029 || !add_dynamic_entry (DT_RELASZ, 0)
3030 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3034 if ((info->flags & DF_TEXTREL) != 0)
3036 if (!add_dynamic_entry (DT_TEXTREL, 0))
3038 info->flags |= DF_TEXTREL;
3041 #undef add_dynamic_entry
3046 /* This function is called via elf_cris_link_hash_traverse if we are
3047 creating a shared object. In the -Bsymbolic case, it discards the
3048 space allocated to copy PC relative relocs against symbols which
3049 are defined in regular objects. For the normal non-symbolic case,
3050 we also discard space for relocs that have become local due to
3051 symbol visibility changes. We allocated space for them in the
3052 check_relocs routine, but we won't fill them in in the
3053 relocate_section routine. */
3056 elf_cris_discard_excess_dso_dynamics (h, inf)
3057 struct elf_cris_link_hash_entry *h;
3060 struct elf_cris_pcrel_relocs_copied *s;
3061 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3063 if (h->root.root.type == bfd_link_hash_warning)
3064 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3066 /* If a symbol has been forced local or we have found a regular
3067 definition for the symbolic link case, then we won't be needing
3069 if (h->root.def_regular
3070 && (h->root.forced_local
3073 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3074 s->section->size -= s->count * sizeof (Elf32_External_Rela);
3080 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3081 creating a shared object. We discard space for relocs for symbols put
3082 in the .got, but which we found we do not have to resolve at run-time. */
3085 elf_cris_discard_excess_program_dynamics (h, inf)
3086 struct elf_cris_link_hash_entry *h;
3089 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3091 if (h->root.root.type == bfd_link_hash_warning)
3092 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3094 /* If we're not creating a shared library and have a symbol which is
3095 referred to by .got references, but the symbol is defined locally,
3096 (or rather, not defined by a DSO) then lose the reloc for the .got
3097 (don't allocate room for it). Likewise for relocs for something
3098 for which we create a PLT. */
3099 if (!h->root.def_dynamic
3100 || h->root.plt.refcount > 0)
3102 if (h->root.got.refcount > 0
3103 /* The size of this section is only valid and in sync with the
3104 various reference counts if we do dynamic; don't decrement it
3106 && elf_hash_table (info)->dynamic_sections_created)
3108 bfd *dynobj = elf_hash_table (info)->dynobj;
3111 BFD_ASSERT (dynobj != NULL);
3113 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3115 BFD_ASSERT (srelgot != NULL);
3117 srelgot->size -= sizeof (Elf32_External_Rela);
3120 /* If the locally-defined symbol isn't used by a DSO, then we don't
3121 have to export it as a dynamic symbol. This was already done for
3122 functions; doing this for all symbols would presumably not
3123 introduce new problems. Of course we don't do this if we're
3124 exporting all dynamic symbols. */
3125 if (! info->export_dynamic
3126 && !h->root.def_dynamic
3127 && !h->root.ref_dynamic)
3129 h->root.dynindx = -1;
3130 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3131 h->root.dynstr_index);
3138 /* Reject a file depending on presence and expectation of prefixed
3139 underscores on symbols. */
3142 cris_elf_object_p (abfd)
3145 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3148 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3149 return (bfd_get_symbol_leading_char (abfd) == '_');
3151 return (bfd_get_symbol_leading_char (abfd) == 0);
3154 /* Mark presence or absence of leading underscore. Set machine type
3155 flags from mach type. */
3158 cris_elf_final_write_processing (abfd, linker)
3160 bfd_boolean linker ATTRIBUTE_UNUSED;
3162 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3164 e_flags &= ~EF_CRIS_UNDERSCORE;
3165 if (bfd_get_symbol_leading_char (abfd) == '_')
3166 e_flags |= EF_CRIS_UNDERSCORE;
3168 switch (bfd_get_mach (abfd))
3170 case bfd_mach_cris_v0_v10:
3171 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3174 case bfd_mach_cris_v10_v32:
3175 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3178 case bfd_mach_cris_v32:
3179 e_flags |= EF_CRIS_VARIANT_V32;
3183 _bfd_abort (__FILE__, __LINE__,
3184 _("Unexpected machine number"));
3187 elf_elfheader (abfd)->e_flags = e_flags;
3190 /* Set the mach type from e_flags value. */
3193 cris_elf_set_mach_from_flags (abfd, flags)
3195 unsigned long flags;
3197 switch (flags & EF_CRIS_VARIANT_MASK)
3199 case EF_CRIS_VARIANT_ANY_V0_V10:
3200 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3203 case EF_CRIS_VARIANT_V32:
3204 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3207 case EF_CRIS_VARIANT_COMMON_V10_V32:
3208 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3212 /* Since we don't recognize them, we obviously can't support them
3213 with this code; we'd have to require that all future handling
3214 would be optional. */
3215 bfd_set_error (bfd_error_wrong_format);
3222 /* Display the flags field. */
3225 cris_elf_print_private_bfd_data (abfd, ptr)
3229 FILE *file = (FILE *) ptr;
3231 BFD_ASSERT (abfd != NULL && ptr != NULL);
3233 _bfd_elf_print_private_bfd_data (abfd, ptr);
3235 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3237 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3238 fprintf (file, _(" [symbols have a _ prefix]"));
3239 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3240 == EF_CRIS_VARIANT_COMMON_V10_V32)
3241 fprintf (file, _(" [v10 and v32]"));
3242 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3243 == EF_CRIS_VARIANT_V32)
3244 fprintf (file, _(" [v32]"));
3250 /* Don't mix files with and without a leading underscore. */
3253 cris_elf_merge_private_bfd_data (ibfd, obfd)
3259 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3262 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3263 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3266 imach = bfd_get_mach (ibfd);
3268 if (! elf_flags_init (obfd))
3270 /* This happens when ld starts out with a 'blank' output file. */
3271 elf_flags_init (obfd) = TRUE;
3273 /* We ignore the linker-set mach, and instead set it according to
3274 the first input file. This would also happen if we could
3275 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3276 This allows us to keep the same linker config across
3277 cris(v0..v10) and crisv32. The drawback is that we can't force
3278 the output type, which might be a sane thing to do for a
3279 v10+v32 compatibility object. */
3280 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3284 if (bfd_get_symbol_leading_char (ibfd)
3285 != bfd_get_symbol_leading_char (obfd))
3287 (*_bfd_error_handler)
3288 (bfd_get_symbol_leading_char (ibfd) == '_'
3289 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3290 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3292 bfd_set_error (bfd_error_bad_value);
3296 omach = bfd_get_mach (obfd);
3300 /* We can get an incompatible combination only if either is
3301 bfd_mach_cris_v32, and the other one isn't compatible. */
3302 if ((imach == bfd_mach_cris_v32
3303 && omach != bfd_mach_cris_v10_v32)
3304 || (omach == bfd_mach_cris_v32
3305 && imach != bfd_mach_cris_v10_v32))
3307 (*_bfd_error_handler)
3308 ((imach == bfd_mach_cris_v32)
3309 ? _("%B contains CRIS v32 code, incompatible"
3310 " with previous objects")
3311 : _("%B contains non-CRIS-v32 code, incompatible"
3312 " with previous objects"),
3314 bfd_set_error (bfd_error_bad_value);
3318 /* We don't have to check the case where the input is compatible
3319 with v10 and v32, because the output is already known to be set
3320 to the other (compatible) mach. */
3321 if (omach == bfd_mach_cris_v10_v32
3322 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3329 /* Do side-effects of e_flags copying to obfd. */
3332 cris_elf_copy_private_bfd_data (ibfd, obfd)
3336 /* Call the base function. */
3337 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3340 /* If output is big-endian for some obscure reason, stop here. */
3341 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
3344 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3345 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3348 /* Do what we really came here for. */
3349 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3352 static enum elf_reloc_type_class
3353 elf_cris_reloc_type_class (rela)
3354 const Elf_Internal_Rela *rela;
3356 switch ((int) ELF32_R_TYPE (rela->r_info))
3358 case R_CRIS_RELATIVE:
3359 return reloc_class_relative;
3360 case R_CRIS_JUMP_SLOT:
3361 return reloc_class_plt;
3363 return reloc_class_copy;
3365 return reloc_class_normal;
3369 #define ELF_ARCH bfd_arch_cris
3370 #define ELF_MACHINE_CODE EM_CRIS
3371 #define ELF_MAXPAGESIZE 0x2000
3373 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
3374 #define TARGET_LITTLE_NAME "elf32-cris"
3375 #define elf_symbol_leading_char 0
3377 #define elf_info_to_howto_rel NULL
3378 #define elf_info_to_howto cris_info_to_howto_rela
3379 #define elf_backend_relocate_section cris_elf_relocate_section
3380 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
3381 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
3382 #define elf_backend_check_relocs cris_elf_check_relocs
3383 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
3384 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
3386 #define elf_backend_can_gc_sections 1
3387 #define elf_backend_can_refcount 1
3389 #define elf_backend_object_p cris_elf_object_p
3390 #define elf_backend_final_write_processing \
3391 cris_elf_final_write_processing
3392 #define bfd_elf32_bfd_print_private_bfd_data \
3393 cris_elf_print_private_bfd_data
3394 #define bfd_elf32_bfd_merge_private_bfd_data \
3395 cris_elf_merge_private_bfd_data
3396 #define bfd_elf32_bfd_copy_private_bfd_data \
3397 cris_elf_copy_private_bfd_data
3399 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
3401 #define bfd_elf32_bfd_link_hash_table_create \
3402 elf_cris_link_hash_table_create
3403 #define elf_backend_adjust_dynamic_symbol \
3404 elf_cris_adjust_dynamic_symbol
3405 #define elf_backend_size_dynamic_sections \
3406 elf_cris_size_dynamic_sections
3407 #define elf_backend_finish_dynamic_symbol \
3408 elf_cris_finish_dynamic_symbol
3409 #define elf_backend_finish_dynamic_sections \
3410 elf_cris_finish_dynamic_sections
3411 #define elf_backend_create_dynamic_sections \
3412 _bfd_elf_create_dynamic_sections
3413 #define bfd_elf32_bfd_final_link \
3414 bfd_elf_gc_common_final_link
3415 #define elf_backend_hide_symbol elf_cris_hide_symbol
3416 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
3418 #define elf_backend_want_got_plt 1
3419 #define elf_backend_plt_readonly 1
3420 #define elf_backend_want_plt_sym 0
3421 #define elf_backend_got_header_size 12
3423 /* Later, we my want to optimize RELA entries into REL entries for dynamic
3424 linking and libraries (if it's a win of any significance). Until then,
3425 take the easy route. */
3426 #define elf_backend_may_use_rel_p 0
3427 #define elf_backend_may_use_rela_p 1
3428 #define elf_backend_rela_normal 1
3430 #include "elf32-target.h"
3432 #define INCLUDED_TARGET_FILE
3434 #undef TARGET_LITTLE_SYM
3435 #undef TARGET_LITTLE_NAME
3436 #undef elf_symbol_leading_char
3438 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
3439 #define TARGET_LITTLE_NAME "elf32-us-cris"
3440 #define elf_symbol_leading_char '_'
3442 #include "elf32-target.h"
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