1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2010, 2011, 2012 Free Software Foundation, Inc.
4 Contributed by Axis Communications AB.
5 Written by Hans-Peter Nilsson, based on elf32-fr30.c
6 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
8 This file is part of BFD, the Binary File Descriptor library.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 MA 02110-1301, USA. */
33 cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *,
34 asection *, bfd *, char **);
36 cris_elf_set_mach_from_flags (bfd *, unsigned long);
38 /* Forward declarations. */
39 static reloc_howto_type cris_elf_howto_table [] =
41 /* This reloc does nothing. */
42 HOWTO (R_CRIS_NONE, /* type */
44 2, /* size (0 = byte, 1 = short, 2 = long) */
46 FALSE, /* pc_relative */
48 complain_overflow_bitfield, /* complain_on_overflow */
49 bfd_elf_generic_reloc, /* special_function */
50 "R_CRIS_NONE", /* name */
51 FALSE, /* partial_inplace */
54 FALSE), /* pcrel_offset */
56 /* An 8 bit absolute relocation. */
57 HOWTO (R_CRIS_8, /* type */
59 0, /* size (0 = byte, 1 = short, 2 = long) */
61 FALSE, /* pc_relative */
63 complain_overflow_bitfield, /* complain_on_overflow */
64 bfd_elf_generic_reloc, /* special_function */
65 "R_CRIS_8", /* name */
66 FALSE, /* partial_inplace */
67 0x0000, /* src_mask */
68 0x00ff, /* dst_mask */
69 FALSE), /* pcrel_offset */
71 /* A 16 bit absolute relocation. */
72 HOWTO (R_CRIS_16, /* type */
74 1, /* size (0 = byte, 1 = short, 2 = long) */
76 FALSE, /* pc_relative */
78 complain_overflow_bitfield, /* complain_on_overflow */
79 bfd_elf_generic_reloc, /* special_function */
80 "R_CRIS_16", /* name */
81 FALSE, /* partial_inplace */
82 0x00000000, /* src_mask */
83 0x0000ffff, /* dst_mask */
84 FALSE), /* pcrel_offset */
86 /* A 32 bit absolute relocation. */
87 HOWTO (R_CRIS_32, /* type */
89 2, /* size (0 = byte, 1 = short, 2 = long) */
91 FALSE, /* pc_relative */
93 /* We don't want overflow complaints for 64-bit vma builds
94 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
95 32-bit ELF) where sym=0xc0001234.
96 Don't do this for the PIC relocs, as we don't expect to
97 see them with large offsets. */
98 complain_overflow_dont, /* complain_on_overflow */
99 bfd_elf_generic_reloc, /* special_function */
100 "R_CRIS_32", /* name */
101 FALSE, /* partial_inplace */
102 0x00000000, /* src_mask */
103 0xffffffff, /* dst_mask */
104 FALSE), /* pcrel_offset */
106 /* An 8 bit PC-relative relocation. */
107 HOWTO (R_CRIS_8_PCREL, /* type */
109 0, /* size (0 = byte, 1 = short, 2 = long) */
111 TRUE, /* pc_relative */
113 complain_overflow_bitfield, /* complain_on_overflow */
114 cris_elf_pcrel_reloc, /* special_function */
115 "R_CRIS_8_PCREL", /* name */
116 FALSE, /* partial_inplace */
117 0x0000, /* src_mask */
118 0x00ff, /* dst_mask */
119 TRUE), /* pcrel_offset */
121 /* A 16 bit PC-relative relocation. */
122 HOWTO (R_CRIS_16_PCREL, /* type */
124 1, /* size (0 = byte, 1 = short, 2 = long) */
126 TRUE, /* pc_relative */
128 complain_overflow_bitfield, /* complain_on_overflow */
129 cris_elf_pcrel_reloc, /* special_function */
130 "R_CRIS_16_PCREL", /* name */
131 FALSE, /* partial_inplace */
132 0x00000000, /* src_mask */
133 0x0000ffff, /* dst_mask */
134 TRUE), /* pcrel_offset */
136 /* A 32 bit PC-relative relocation. */
137 HOWTO (R_CRIS_32_PCREL, /* type */
139 2, /* size (0 = byte, 1 = short, 2 = long) */
141 TRUE, /* pc_relative */
143 complain_overflow_bitfield, /* complain_on_overflow */
144 cris_elf_pcrel_reloc, /* special_function */
145 "R_CRIS_32_PCREL", /* name */
146 FALSE, /* partial_inplace */
147 0x00000000, /* src_mask */
148 0xffffffff, /* dst_mask */
149 TRUE), /* pcrel_offset */
151 /* GNU extension to record C++ vtable hierarchy. */
152 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE, /* pc_relative */
158 complain_overflow_dont, /* complain_on_overflow */
159 NULL, /* special_function */
160 "R_CRIS_GNU_VTINHERIT", /* name */
161 FALSE, /* partial_inplace */
164 FALSE), /* pcrel_offset */
166 /* GNU extension to record C++ vtable member usage. */
167 HOWTO (R_CRIS_GNU_VTENTRY, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 FALSE, /* pc_relative */
173 complain_overflow_dont, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
175 "R_CRIS_GNU_VTENTRY", /* name */
176 FALSE, /* partial_inplace */
179 FALSE), /* pcrel_offset */
181 /* This is used only by the dynamic linker. The symbol should exist
182 both in the object being run and in some shared library. The
183 dynamic linker copies the data addressed by the symbol from the
184 shared library into the object, because the object being
185 run has to have the data at some particular address. */
186 HOWTO (R_CRIS_COPY, /* type */
188 2, /* size (0 = byte, 1 = short, 2 = long) */
190 FALSE, /* pc_relative */
192 complain_overflow_bitfield, /* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_CRIS_COPY", /* name */
195 FALSE, /* partial_inplace */
198 FALSE), /* pcrel_offset */
200 /* Like R_CRIS_32, but used when setting global offset table entries. */
201 HOWTO (R_CRIS_GLOB_DAT, /* type */
203 2, /* size (0 = byte, 1 = short, 2 = long) */
205 FALSE, /* pc_relative */
207 complain_overflow_bitfield, /* complain_on_overflow */
208 bfd_elf_generic_reloc, /* special_function */
209 "R_CRIS_GLOB_DAT", /* name */
210 FALSE, /* partial_inplace */
212 0xffffffff, /* dst_mask */
213 FALSE), /* pcrel_offset */
215 /* Marks a procedure linkage table entry for a symbol. */
216 HOWTO (R_CRIS_JUMP_SLOT, /* type */
218 2, /* size (0 = byte, 1 = short, 2 = long) */
220 FALSE, /* pc_relative */
222 complain_overflow_bitfield, /* complain_on_overflow */
223 bfd_elf_generic_reloc, /* special_function */
224 "R_CRIS_JUMP_SLOT", /* name */
225 FALSE, /* partial_inplace */
228 FALSE), /* pcrel_offset */
230 /* Used only by the dynamic linker. When the object is run, this
231 longword is set to the load address of the object, plus the
233 HOWTO (R_CRIS_RELATIVE, /* type */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
237 FALSE, /* pc_relative */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_CRIS_RELATIVE", /* name */
242 FALSE, /* partial_inplace */
244 0xffffffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
247 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
248 HOWTO (R_CRIS_16_GOT, /* type */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
252 FALSE, /* pc_relative */
254 complain_overflow_bitfield, /* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_CRIS_16_GOT", /* name */
257 FALSE, /* partial_inplace */
259 0xffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
262 HOWTO (R_CRIS_32_GOT, /* type */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
266 FALSE, /* pc_relative */
268 complain_overflow_bitfield, /* complain_on_overflow */
269 bfd_elf_generic_reloc, /* special_function */
270 "R_CRIS_32_GOT", /* name */
271 FALSE, /* partial_inplace */
273 0xffffffff, /* dst_mask */
274 FALSE), /* pcrel_offset */
276 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
277 the GOT table for the symbol. */
278 HOWTO (R_CRIS_16_GOTPLT, /* type */
280 1, /* size (0 = byte, 1 = short, 2 = long) */
282 FALSE, /* pc_relative */
284 complain_overflow_bitfield, /* complain_on_overflow */
285 bfd_elf_generic_reloc, /* special_function */
286 "R_CRIS_16_GOTPLT", /* name */
287 FALSE, /* partial_inplace */
289 0xffff, /* dst_mask */
290 FALSE), /* pcrel_offset */
292 HOWTO (R_CRIS_32_GOTPLT, /* type */
294 2, /* size (0 = byte, 1 = short, 2 = long) */
296 FALSE, /* pc_relative */
298 complain_overflow_bitfield, /* complain_on_overflow */
299 bfd_elf_generic_reloc, /* special_function */
300 "R_CRIS_32_GOTPLT", /* name */
301 FALSE, /* partial_inplace */
303 0xffffffff, /* dst_mask */
304 FALSE), /* pcrel_offset */
306 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
308 HOWTO (R_CRIS_32_GOTREL, /* type */
310 2, /* 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_32_GOTREL", /* name */
317 FALSE, /* partial_inplace */
319 0xffffffff, /* dst_mask */
320 FALSE), /* pcrel_offset */
322 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
323 to create PLT entry for symbol. */
324 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */
326 2, /* size (0 = byte, 1 = short, 2 = long) */
328 FALSE, /* pc_relative */
330 complain_overflow_bitfield, /* complain_on_overflow */
331 bfd_elf_generic_reloc, /* special_function */
332 "R_CRIS_32_PLT_GOTREL", /* name */
333 FALSE, /* partial_inplace */
335 0xffffffff, /* dst_mask */
336 FALSE), /* pcrel_offset */
338 /* A 32-bit offset from PC (location after the relocation) + addend to
339 entry for this symbol in PLT and request to create PLT entry for
341 HOWTO (R_CRIS_32_PLT_PCREL, /* type */
343 2, /* size (0 = byte, 1 = short, 2 = long) */
345 TRUE, /* pc_relative */
347 complain_overflow_bitfield, /* complain_on_overflow */
348 cris_elf_pcrel_reloc, /* special_function */
349 "R_CRIS_32_PLT_PCREL", /* name */
350 FALSE, /* partial_inplace */
352 0xffffffff, /* dst_mask */
353 TRUE), /* pcrel_offset */
355 /* We don't handle these in any special manner and cross-format
356 linking is not supported; just recognize them enough to pass them
357 around. FIXME: do the same for most PIC relocs and add sanity
358 tests to actually refuse gracefully to handle these and PIC
359 relocs for cross-format linking. */
360 #define TLSHOWTO32(name) \
361 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
362 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
363 #define TLSHOWTO16X(name, X) \
364 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
365 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
366 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
367 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
369 TLSHOWTO32 (R_CRIS_32_GOT_GD),
370 TLSHOWTO16 (R_CRIS_16_GOT_GD),
371 TLSHOWTO32 (R_CRIS_32_GD),
372 TLSHOWTO32 (R_CRIS_DTP),
373 TLSHOWTO32 (R_CRIS_32_DTPREL),
374 TLSHOWTO16S (R_CRIS_16_DTPREL),
375 TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
376 TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
377 TLSHOWTO32 (R_CRIS_32_TPREL),
378 TLSHOWTO16S (R_CRIS_16_TPREL),
379 TLSHOWTO32 (R_CRIS_DTPMOD),
380 TLSHOWTO32 (R_CRIS_32_IE)
383 /* Map BFD reloc types to CRIS ELF reloc types. */
385 struct cris_reloc_map
387 bfd_reloc_code_real_type bfd_reloc_val;
388 unsigned int cris_reloc_val;
391 static const struct cris_reloc_map cris_reloc_map [] =
393 { BFD_RELOC_NONE, R_CRIS_NONE },
394 { BFD_RELOC_8, R_CRIS_8 },
395 { BFD_RELOC_16, R_CRIS_16 },
396 { BFD_RELOC_32, R_CRIS_32 },
397 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
398 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
399 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
400 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
401 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
402 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
403 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
404 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
405 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
406 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
407 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
408 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
409 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
410 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
411 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
412 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
413 { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD },
414 { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD },
415 { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD },
416 { BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
417 { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL },
418 { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL },
419 { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
420 { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
421 { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL },
422 { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL },
423 { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD },
424 { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE }
427 static reloc_howto_type *
428 cris_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
429 bfd_reloc_code_real_type code)
433 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
434 if (cris_reloc_map [i].bfd_reloc_val == code)
435 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
440 static reloc_howto_type *
441 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
446 i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
448 if (cris_elf_howto_table[i].name != NULL
449 && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
450 return &cris_elf_howto_table[i];
455 /* Set the howto pointer for an CRIS ELF reloc. */
458 cris_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
460 Elf_Internal_Rela * dst)
462 enum elf_cris_reloc_type r_type;
464 r_type = ELF32_R_TYPE (dst->r_info);
465 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
466 cache_ptr->howto = & cris_elf_howto_table [r_type];
469 bfd_reloc_status_type
470 cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
471 arelent *reloc_entry,
473 void * data ATTRIBUTE_UNUSED,
474 asection *input_section,
476 char **error_message ATTRIBUTE_UNUSED)
478 /* By default (using only bfd_elf_generic_reloc when linking to
479 non-ELF formats) PC-relative relocs are relative to the beginning
480 of the reloc. CRIS PC-relative relocs are relative to the position
481 *after* the reloc because that's what pre-CRISv32 PC points to
482 after reading an insn field with that reloc. (For CRISv32, PC is
483 actually relative to the start of the insn, but we keep the old
484 definition.) Still, we use as much generic machinery as we can.
486 Only adjust when doing a final link. */
487 if (output_bfd == (bfd *) NULL)
488 reloc_entry->addend -= 1 << reloc_entry->howto->size;
491 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
492 input_section, output_bfd, error_message);
495 /* Support for core dump NOTE sections.
496 The slightly unintuitive code layout is an attempt to keep at least
497 some similarities with other ports, hoping to simplify general
498 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
501 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
506 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
507 switch (note->descsz)
512 case 202: /* Linux/CRISv32 */
514 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
517 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
526 switch (note->descsz)
531 case 214: /* Linux/CRIS */
533 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
536 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
545 /* Make a ".reg/999" section. */
546 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
547 size, note->descpos + offset);
551 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
553 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
554 switch (note->descsz)
559 case 124: /* Linux/CRISv32 elf_prpsinfo */
560 elf_tdata (abfd)->core->program
561 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
562 elf_tdata (abfd)->core->command
563 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
566 switch (note->descsz)
571 case 124: /* Linux/CRIS elf_prpsinfo */
572 elf_tdata (abfd)->core->program
573 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
574 elf_tdata (abfd)->core->command
575 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
578 /* Note that for some reason, a spurious space is tacked
579 onto the end of the args in some (at least one anyway)
580 implementations, so strip it off if it exists. */
583 char *command = elf_tdata (abfd)->core->command;
584 int n = strlen (command);
586 if (0 < n && command[n - 1] == ' ')
587 command[n - 1] = '\0';
593 /* The name of the dynamic interpreter. This is put in the .interp
596 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
598 /* The size in bytes of an entry in the procedure linkage table. */
600 #define PLT_ENTRY_SIZE 20
601 #define PLT_ENTRY_SIZE_V32 26
603 /* The first entry in an absolute procedure linkage table looks like this. */
605 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
608 0x7e, 0x7e, /* push mof. */
609 0x7f, 0x0d, /* (dip [pc+]) */
610 0, 0, 0, 0, /* Replaced with address of .got + 4. */
611 0x30, 0x7a, /* move [...],mof */
612 0x7f, 0x0d, /* (dip [pc+]) */
613 0, 0, 0, 0, /* Replaced with address of .got + 8. */
614 0x30, 0x09 /* jump [...] */
617 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
619 0x84, 0xe2, /* subq 4,$sp */
620 0x6f, 0xfe, /* move.d 0,$acr */
621 0, 0, 0, 0, /* Replaced by address of .got + 4. */
622 0x7e, 0x7a, /* move $mof,[$sp] */
623 0x3f, 0x7a, /* move [$acr],$mof */
624 0x04, 0xf2, /* addq 4,acr */
625 0x6f, 0xfa, /* move.d [$acr],$acr */
626 0xbf, 0x09, /* jump $acr */
627 0xb0, 0x05, /* nop */
628 0, 0 /* Pad out to 26 bytes. */
631 /* Subsequent entries in an absolute procedure linkage table look like
634 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
636 0x7f, 0x0d, /* (dip [pc+]) */
637 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
638 0x30, 0x09, /* jump [...] */
639 0x3f, 0x7e, /* move [pc+],mof */
640 0, 0, 0, 0, /* Replaced with offset into relocation table. */
641 0x2f, 0xfe, /* add.d [pc+],pc */
643 0xff, 0xff /* Replaced with offset to start of .plt. */
646 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
648 0x6f, 0xfe, /* move.d 0,$acr */
649 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
650 0x6f, 0xfa, /* move.d [$acr],$acr */
651 0xbf, 0x09, /* jump $acr */
652 0xb0, 0x05, /* nop */
653 0x3f, 0x7e, /* move 0,mof */
654 0, 0, 0, 0, /* Replaced with offset into relocation table. */
655 0xbf, 0x0e, /* ba start_of_plt0_entry */
656 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
660 /* The first entry in a PIC procedure linkage table looks like this. */
662 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
664 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
665 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
666 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
667 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
670 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
672 0x84, 0xe2, /* subq 4,$sp */
673 0x04, 0x01, /* addoq 4,$r0,$acr */
674 0x7e, 0x7a, /* move $mof,[$sp] */
675 0x3f, 0x7a, /* move [$acr],$mof */
676 0x04, 0xf2, /* addq 4,$acr */
677 0x6f, 0xfa, /* move.d [$acr],$acr */
678 0xbf, 0x09, /* jump $acr */
679 0xb0, 0x05, /* nop */
680 0, 0, /* Pad out to 26 bytes. */
685 /* Subsequent entries in a PIC procedure linkage table look like this. */
687 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
689 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
690 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
691 0x30, 0x09, /* jump [...] */
692 0x3f, 0x7e, /* move [pc+],mof */
693 0, 0, 0, 0, /* Replaced with offset into relocation table. */
694 0x2f, 0xfe, /* add.d [pc+],pc */
695 0xec, 0xff, /* Replaced with offset to start of .plt. */
699 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
701 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
702 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
703 0x6f, 0xfa, /* move.d [$acr],$acr */
704 0xbf, 0x09, /* jump $acr */
705 0xb0, 0x05, /* nop */
706 0x3f, 0x7e, /* move relocoffs,$mof */
707 0, 0, 0, 0, /* Replaced with offset into relocation table. */
708 0xbf, 0x0e, /* ba start_of_plt */
709 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
713 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
714 (and most other PIC/shlib stuff). Check that we don't drift away
717 The CRIS linker, like the m68k and i386 linkers (and probably the rest
718 too) needs to keep track of the number of relocs that it decides to
719 copy in check_relocs for each symbol. This is so that it can discard
720 PC relative relocs if it doesn't need them when linking with
721 -Bsymbolic. We store the information in a field extending the regular
722 ELF linker hash table. */
724 /* This structure keeps track of the number of PC relative relocs we have
725 copied for a given symbol. */
727 struct elf_cris_pcrel_relocs_copied
730 struct elf_cris_pcrel_relocs_copied *next;
732 /* A section in dynobj. */
735 /* Number of relocs copied in this section. */
738 /* Example of reloc being copied, for message. */
739 enum elf_cris_reloc_type r_type;
742 /* CRIS ELF linker hash entry. */
744 struct elf_cris_link_hash_entry
746 struct elf_link_hash_entry root;
748 /* Number of PC relative relocs copied for this symbol. */
749 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
751 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
752 both a general GOT and a PLT-specific GOT entry for the same symbol,
753 when it is referenced both as a function and as a function pointer.
755 Number of GOTPLT references for a function. */
756 bfd_signed_vma gotplt_refcount;
758 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
759 (zero is never used as an index). FIXME: We should be able to fold
760 this with gotplt_refcount in a union, like the got and plt unions in
761 elf_link_hash_entry. */
762 bfd_size_type gotplt_offset;
764 /* The root.got.refcount is the sum of the regular reference counts
765 (this) and those members below. We have to keep a separate count
766 to track when we've found the first (or last) reference to a
767 regular got entry. The offset is in root.got.offset. */
768 bfd_signed_vma reg_got_refcount;
770 /* Similar to the above, the number of reloc references to this
771 symbols that need a R_CRIS_32_TPREL slot. The offset is in
772 root.got.offset, because this and .dtp_refcount can't validly
773 happen when there's also a regular GOT entry; that's invalid
774 input for which an error is emitted. */
775 bfd_signed_vma tprel_refcount;
777 /* Similar to the above, the number of reloc references to this
778 symbols that need a R_CRIS_DTP slot. The offset is in
779 root.got.offset; plus 4 if .tprel_refcount > 0. */
780 bfd_signed_vma dtp_refcount;
784 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
787 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
790 /* The local_got_refcounts and local_got_offsets are a multiple of
791 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
792 refcount for GOT itself, see code), with the summary / group offset
793 for local symbols located at offset N, reference counts for
794 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
795 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
798 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
799 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
800 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
801 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
803 /* CRIS ELF linker hash table. */
805 struct elf_cris_link_hash_table
807 struct elf_link_hash_table root;
809 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
810 since we try and avoid creating GOTPLT:s when there's already a GOT.
811 Instead, we keep and update the next available index here. */
812 bfd_size_type next_gotplt_entry;
814 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
815 been seen for any input; if != 0, then the constant-offset
816 R_CRIS_DTPMOD is needed for this DSO/executable. This turns
817 negative at relocation, so that we don't need an extra flag for
818 when the reloc is output. */
819 bfd_signed_vma dtpmod_refcount;
822 /* Traverse a CRIS ELF linker hash table. */
824 #define elf_cris_link_hash_traverse(table, func, info) \
825 (elf_link_hash_traverse \
827 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
830 /* Get the CRIS ELF linker hash table from a link_info structure. */
832 #define elf_cris_hash_table(p) \
833 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
834 == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
836 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
837 "parent class"). The .root reference is just a simple type
838 check on the argument. */
840 #define elf_cris_hash_entry(p) \
841 ((struct elf_cris_link_hash_entry *) (&(p)->root))
843 /* Create an entry in a CRIS ELF linker hash table. */
845 static struct bfd_hash_entry *
846 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
847 struct bfd_hash_table *table,
850 struct elf_cris_link_hash_entry *ret =
851 (struct elf_cris_link_hash_entry *) entry;
853 /* Allocate the structure if it has not already been allocated by a
855 if (ret == (struct elf_cris_link_hash_entry *) NULL)
856 ret = ((struct elf_cris_link_hash_entry *)
857 bfd_hash_allocate (table,
858 sizeof (struct elf_cris_link_hash_entry)));
859 if (ret == (struct elf_cris_link_hash_entry *) NULL)
860 return (struct bfd_hash_entry *) ret;
862 /* Call the allocation method of the superclass. */
863 ret = ((struct elf_cris_link_hash_entry *)
864 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
866 if (ret != (struct elf_cris_link_hash_entry *) NULL)
868 ret->pcrel_relocs_copied = NULL;
869 ret->gotplt_refcount = 0;
870 ret->gotplt_offset = 0;
871 ret->dtp_refcount = 0;
872 ret->tprel_refcount = 0;
873 ret->reg_got_refcount = 0;
876 return (struct bfd_hash_entry *) ret;
879 /* Create a CRIS ELF linker hash table. */
881 static struct bfd_link_hash_table *
882 elf_cris_link_hash_table_create (bfd *abfd)
884 struct elf_cris_link_hash_table *ret;
885 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
887 ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
888 if (ret == (struct elf_cris_link_hash_table *) NULL)
891 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
892 elf_cris_link_hash_newfunc,
893 sizeof (struct elf_cris_link_hash_entry),
900 /* Initialize to skip over the first three entries in the gotplt; they
901 are used for run-time symbol evaluation. */
902 ret->next_gotplt_entry = 12;
904 return &ret->root.root;
907 /* Perform a single relocation. By default we use the standard BFD
908 routines, with a few tweaks. */
910 static bfd_reloc_status_type
911 cris_final_link_relocate (reloc_howto_type * howto,
913 asection * input_section,
915 Elf_Internal_Rela * rel,
918 bfd_reloc_status_type r;
919 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
921 /* PC-relative relocations are relative to the position *after*
922 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
923 not a single byte, since PC must be 16-bit-aligned. */
926 /* Check that the 16-bit GOT relocs are positive. */
927 case R_CRIS_16_GOTPLT:
929 if ((bfd_signed_vma) relocation < 0)
930 return bfd_reloc_overflow;
933 case R_CRIS_32_PLT_PCREL:
934 case R_CRIS_32_PCREL:
938 case R_CRIS_16_PCREL:
946 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
947 contents, rel->r_offset,
948 relocation, rel->r_addend);
953 /* The number of errors left before we stop outputting reloc-specific
954 explanatory messages. By coincidence, this works nicely together
955 with the default number of messages you'll get from LD about
956 "relocation truncated to fit" messages before you get an
957 "additional relocation overflows omitted from the output". */
958 static int additional_relocation_error_msg_count = 10;
960 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
961 copied, for further comments. */
964 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
965 struct bfd_link_info *info,
967 asection *input_section,
969 Elf_Internal_Rela *relocs,
970 Elf_Internal_Sym *local_syms,
971 asection **local_sections)
973 struct elf_cris_link_hash_table * htab;
975 Elf_Internal_Shdr *symtab_hdr;
976 struct elf_link_hash_entry **sym_hashes;
977 bfd_vma *local_got_offsets;
981 Elf_Internal_Rela *rel;
982 Elf_Internal_Rela *relend;
985 htab = elf_cris_hash_table (info);
989 dynobj = elf_hash_table (info)->dynobj;
990 local_got_offsets = elf_local_got_offsets (input_bfd);
991 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
992 sym_hashes = elf_sym_hashes (input_bfd);
993 relend = relocs + input_section->reloc_count;
1002 splt = bfd_get_linker_section (dynobj, ".plt");
1003 sgot = bfd_get_linker_section (dynobj, ".got");
1006 for (rel = relocs; rel < relend; rel ++)
1008 reloc_howto_type *howto;
1009 unsigned long r_symndx;
1010 Elf_Internal_Sym *sym;
1012 struct elf_link_hash_entry *h;
1014 bfd_reloc_status_type r;
1015 const char *symname = NULL;
1016 enum elf_cris_reloc_type r_type;
1018 r_type = ELF32_R_TYPE (rel->r_info);
1020 if ( r_type == R_CRIS_GNU_VTINHERIT
1021 || r_type == R_CRIS_GNU_VTENTRY)
1024 r_symndx = ELF32_R_SYM (rel->r_info);
1025 howto = cris_elf_howto_table + r_type;
1030 if (r_symndx < symtab_hdr->sh_info)
1032 sym = local_syms + r_symndx;
1033 sec = local_sections [r_symndx];
1034 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1036 symname = (bfd_elf_string_from_elf_section
1037 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1038 if (symname == NULL)
1039 symname = bfd_section_name (input_bfd, sec);
1044 bfd_boolean unresolved_reloc;
1046 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1047 r_symndx, symtab_hdr, sym_hashes,
1049 unresolved_reloc, warned);
1051 symname = h->root.root.string;
1053 if (unresolved_reloc
1054 /* Perhaps we should detect the cases that
1055 sec->output_section is expected to be NULL like i386 and
1056 m68k, but apparently (and according to elfxx-ia64.c) all
1057 valid cases are where the symbol is defined in a shared
1058 object which we link dynamically against. This includes
1059 PLT relocs for which we've created a PLT entry and other
1060 relocs for which we're prepared to create dynamic
1063 For now, new situations cause us to just err when
1064 sec->output_offset is NULL but the object with the symbol
1065 is *not* dynamically linked against. Thus this will
1066 automatically remind us so we can see if there are other
1067 valid cases we need to revisit. */
1068 && (sec->owner->flags & DYNAMIC) != 0)
1071 else if (h->root.type == bfd_link_hash_defined
1072 || h->root.type == bfd_link_hash_defweak)
1074 /* Here follow the cases where the relocation value must
1075 be zero (or when further handling is simplified when
1076 zero). I can't claim to understand the various
1077 conditions and they weren't described in the files
1078 where I copied them from (elf32-m68k.c and
1079 elf32-i386.c), but let's mention examples of where
1080 they happen. FIXME: Perhaps define and use a
1081 dynamic_symbol_p function like ia64.
1083 - When creating a shared library, we can have an
1084 ordinary relocation for a symbol defined in a shared
1085 library (perhaps the one we create). We then make
1086 the relocation value zero, as the value seen now will
1087 be added into the relocation addend in this shared
1088 library, but must be handled only at dynamic-link
1089 time. FIXME: Not sure this example covers the
1090 h->elf_link_hash_flags test, though it's there in
1093 && ((! info->symbolic && h->dynindx != -1)
1095 && (input_section->flags & SEC_ALLOC) != 0
1096 && (r_type == R_CRIS_8
1097 || r_type == R_CRIS_16
1098 || r_type == R_CRIS_32
1099 || r_type == R_CRIS_8_PCREL
1100 || r_type == R_CRIS_16_PCREL
1101 || r_type == R_CRIS_32_PCREL))
1103 else if (!info->relocatable && unresolved_reloc
1104 && (_bfd_elf_section_offset (output_bfd, info,
1110 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1113 cris_elf_howto_table[r_type].name,
1115 bfd_set_error (bfd_error_bad_value);
1121 if (sec != NULL && discarded_section (sec))
1122 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1123 rel, 1, relend, howto, 0, contents);
1125 if (info->relocatable)
1130 case R_CRIS_16_GOTPLT:
1131 case R_CRIS_32_GOTPLT:
1132 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1133 but we require a PLT, and the PLT handling will take care of
1134 filling in the PLT-specific GOT entry. For the GOT offset,
1135 calculate it as we do when filling it in for the .got.plt
1136 section. If we don't have a PLT, punt to GOT handling. */
1138 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1141 = bfd_get_linker_section (dynobj, ".got.plt");
1144 BFD_ASSERT (h->dynindx != -1);
1145 BFD_ASSERT (sgotplt != NULL);
1148 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1150 relocation = got_offset;
1154 /* We didn't make a PLT entry for this symbol. Maybe everything is
1155 folded into the GOT. Other than folding, this happens when
1156 statically linking PIC code, or when using -Bsymbolic. Check
1157 that we instead have a GOT entry as done for us by
1158 elf_cris_adjust_dynamic_symbol, and drop through into the
1159 ordinary GOT cases. This must not happen for the
1160 executable, because any reference it does to a function
1161 that is satisfied by a DSO must generate a PLT. We assume
1162 these call-specific relocs don't address non-functions. */
1164 && (h->got.offset == (bfd_vma) -1
1168 && h->root.type == bfd_link_hash_undefweak)))))
1170 (*_bfd_error_handler)
1171 ((h->got.offset == (bfd_vma) -1)
1172 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1173 " against symbol `%s'")
1174 : _("%B, section %A: No PLT for relocation %s"
1175 " against symbol `%s'"),
1178 cris_elf_howto_table[r_type].name,
1179 (symname != NULL && symname[0] != '\0'
1180 ? symname : _("[whose name is lost]")));
1182 /* FIXME: Perhaps blaming input is not the right thing to
1183 do; this is probably an internal error. But it is true
1184 that we didn't like that particular input. */
1185 bfd_set_error (bfd_error_bad_value);
1190 /* The size of the actual relocation is not used here; we only
1191 fill in the GOT table here. */
1197 /* Note that despite using RELA relocations, the .got contents
1198 is always filled in with the link-relative relocation
1199 value; the addend. */
1203 off = h->got.offset;
1204 BFD_ASSERT (off != (bfd_vma) -1);
1206 if (!elf_hash_table (info)->dynamic_sections_created
1209 || h->type == STT_FUNC
1212 && (info->symbolic || h->dynindx == -1)
1215 /* This wasn't checked above for ! info->shared, but
1216 must hold there if we get here; the symbol must
1217 be defined in the regular program or be undefweak
1218 or be a function or otherwise need a PLT. */
1219 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1222 || h->type == STT_FUNC
1224 || h->root.type == bfd_link_hash_undefweak);
1226 /* This is actually a static link, or it is a
1227 -Bsymbolic link and the symbol is defined locally,
1228 or is undefweak, or the symbol was forced to be
1229 local because of a version file, or we're not
1230 creating a dynamic object. We must initialize this
1231 entry in the global offset table. Since the offset
1232 must always be a multiple of 4, we use the least
1233 significant bit to record whether we have
1234 initialized it already.
1236 If this GOT entry should be runtime-initialized, we
1237 will create a .rela.got relocation entry to
1238 initialize the value. This is done in the
1239 finish_dynamic_symbol routine. */
1244 bfd_put_32 (output_bfd, relocation,
1245 sgot->contents + off);
1252 BFD_ASSERT (local_got_offsets != NULL
1253 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1255 off = local_got_offsets[r_symndx];
1257 /* The offset must always be a multiple of 4. We use
1258 the least significant bit to record whether we have
1259 already generated the necessary reloc. */
1264 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1268 Elf_Internal_Rela outrel;
1271 if (srelgot == NULL)
1273 = bfd_get_linker_section (dynobj, ".rela.got");
1274 BFD_ASSERT (srelgot != NULL);
1276 outrel.r_offset = (sgot->output_section->vma
1277 + sgot->output_offset
1279 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1280 outrel.r_addend = relocation;
1281 loc = srelgot->contents;
1282 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1283 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1286 local_got_offsets[r_symndx] |= 1;
1290 relocation = sgot->output_offset + off;
1291 if (rel->r_addend != 0)
1293 /* We can't do anything for a relocation which is against
1294 a symbol *plus offset*. GOT holds relocations for
1295 symbols. Make this an error; the compiler isn't
1296 allowed to pass us these kinds of things. */
1298 (*_bfd_error_handler)
1299 (_("%B, section %A: relocation %s with non-zero addend %d"
1300 " against local symbol"),
1303 cris_elf_howto_table[r_type].name,
1306 (*_bfd_error_handler)
1307 (_("%B, section %A: relocation %s with non-zero addend %d"
1308 " against symbol `%s'"),
1311 cris_elf_howto_table[r_type].name,
1313 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1315 bfd_set_error (bfd_error_bad_value);
1321 case R_CRIS_32_GOTREL:
1322 /* This relocation must only be performed against local symbols.
1323 It's also ok when we link a program and the symbol is either
1324 defined in an ordinary (non-DSO) object or is undefined weak. */
1326 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1330 && h->root.type == bfd_link_hash_undefweak))))
1332 (*_bfd_error_handler)
1333 (_("%B, section %A: relocation %s is"
1334 " not allowed for global symbol: `%s'"),
1337 cris_elf_howto_table[r_type].name,
1339 bfd_set_error (bfd_error_bad_value);
1343 /* This can happen if we get a link error with the input ELF
1344 variant mismatching the output variant. Emit an error so
1345 it's noticed if it happens elsewhere. */
1348 (*_bfd_error_handler)
1349 (_("%B, section %A: relocation %s with no GOT created"),
1352 cris_elf_howto_table[r_type].name);
1353 bfd_set_error (bfd_error_bad_value);
1357 /* This relocation is like a PC-relative one, except the
1358 reference point is the location of GOT. Note that
1359 sgot->output_offset is not involved in this calculation. We
1360 always want the start of entire .got section, not the
1361 position after the reserved header. */
1362 relocation -= sgot->output_section->vma;
1365 case R_CRIS_32_PLT_PCREL:
1366 /* Relocation is to the entry for this symbol in the
1367 procedure linkage table. */
1369 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1370 without using the procedure linkage table. */
1371 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1374 if (h->plt.offset == (bfd_vma) -1
1377 /* We didn't make a PLT entry for this symbol. This
1378 happens when statically linking PIC code, or when
1379 using -Bsymbolic. */
1383 relocation = (splt->output_section->vma
1384 + splt->output_offset
1388 case R_CRIS_32_PLT_GOTREL:
1389 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1390 start of the .got section. See also comment at
1392 relocation -= sgot->output_section->vma;
1394 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1395 without using the procedure linkage table. */
1396 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1399 if (h->plt.offset == (bfd_vma) -1
1402 /* We didn't make a PLT entry for this symbol. This
1403 happens when statically linking PIC code, or when
1404 using -Bsymbolic. */
1408 relocation = (splt->output_section->vma
1409 + splt->output_offset
1411 - sgot->output_section->vma);
1414 case R_CRIS_8_PCREL:
1415 case R_CRIS_16_PCREL:
1416 case R_CRIS_32_PCREL:
1417 /* If the symbol was local, we need no shlib-specific handling. */
1418 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1419 || h->dynindx == -1)
1427 && r_symndx != STN_UNDEF
1428 && (input_section->flags & SEC_ALLOC) != 0
1429 && ((r_type != R_CRIS_8_PCREL
1430 && r_type != R_CRIS_16_PCREL
1431 && r_type != R_CRIS_32_PCREL)
1433 || (h != NULL && !h->def_regular))))
1435 Elf_Internal_Rela outrel;
1437 bfd_boolean skip, relocate;
1439 /* When generating a shared object, these relocations
1440 are copied into the output file to be resolved at run
1445 sreloc = _bfd_elf_get_dynamic_reloc_section
1446 (dynobj, input_section, /*rela?*/ TRUE);
1447 /* The section should have been created in cris_elf_check_relocs,
1448 but that function will not be called for objects which fail in
1449 cris_elf_merge_private_bfd_data. */
1452 bfd_set_error (bfd_error_bad_value);
1461 _bfd_elf_section_offset (output_bfd, info, input_section,
1463 if (outrel.r_offset == (bfd_vma) -1)
1465 else if (outrel.r_offset == (bfd_vma) -2
1466 /* For now, undefined weak symbols with non-default
1467 visibility (yielding 0), like exception info for
1468 discarded sections, will get a R_CRIS_NONE
1469 relocation rather than no relocation, because we
1470 notice too late that the symbol doesn't need a
1473 && h->root.type == bfd_link_hash_undefweak
1474 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1475 skip = TRUE, relocate = TRUE;
1476 outrel.r_offset += (input_section->output_section->vma
1477 + input_section->output_offset);
1480 memset (&outrel, 0, sizeof outrel);
1481 /* h->dynindx may be -1 if the symbol was marked to
1484 && ((! info->symbolic && h->dynindx != -1)
1485 || !h->def_regular))
1487 BFD_ASSERT (h->dynindx != -1);
1488 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1489 outrel.r_addend = relocation + rel->r_addend;
1493 outrel.r_addend = relocation + rel->r_addend;
1495 if (r_type == R_CRIS_32)
1498 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1504 if (bfd_is_abs_section (sec))
1506 else if (sec == NULL || sec->owner == NULL)
1508 bfd_set_error (bfd_error_bad_value);
1515 /* We are turning this relocation into one
1516 against a section symbol. It would be
1517 proper to subtract the symbol's value,
1518 osec->vma, from the emitted reloc addend,
1519 but ld.so expects buggy relocs. */
1520 osec = sec->output_section;
1521 indx = elf_section_data (osec)->dynindx;
1524 osec = htab->root.text_index_section;
1525 indx = elf_section_data (osec)->dynindx;
1527 BFD_ASSERT (indx != 0);
1530 outrel.r_info = ELF32_R_INFO (indx, r_type);
1534 loc = sreloc->contents;
1535 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1536 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1538 /* This reloc will be computed at runtime, so there's no
1539 need to do anything now, except for R_CRIS_32 relocations
1540 that have been turned into R_CRIS_RELATIVE. */
1547 case R_CRIS_16_DTPREL:
1548 case R_CRIS_32_DTPREL:
1549 /* This relocation must only be performed against local
1550 symbols, or to sections that are not loadable. It's also
1551 ok when we link a program and the symbol is defined in an
1552 ordinary (non-DSO) object (if it's undefined there, we've
1553 already seen an error). */
1555 && (input_section->flags & SEC_ALLOC) != 0
1556 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1559 && h->root.type != bfd_link_hash_undefined)))
1561 (*_bfd_error_handler)
1562 ((h->root.type == bfd_link_hash_undefined)
1563 /* We shouldn't get here for GCC-emitted code. */
1564 ? _("%B, section %A: relocation %s has an undefined"
1565 " reference to `%s', perhaps a declaration mixup?")
1566 : ("%B, section %A: relocation %s is"
1567 " not allowed for `%s', a global symbol with default"
1568 " visibility, perhaps a declaration mixup?"),
1571 cris_elf_howto_table[r_type].name,
1572 symname != NULL && symname[0] != '\0'
1573 ? symname : _("[whose name is lost]"));
1574 bfd_set_error (bfd_error_bad_value);
1578 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1579 || htab->dtpmod_refcount != 0);
1581 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1582 already done so. Note that we do this in .got.plt, not
1583 in .got, as .got.plt contains the first part, still the
1584 reloc is against .got, because the linker script directs
1585 (is required to direct) them both into .got. */
1586 if (htab->dtpmod_refcount > 0
1587 && (input_section->flags & SEC_ALLOC) != 0)
1589 asection *sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1590 BFD_ASSERT (sgotplt != NULL);
1594 Elf_Internal_Rela outrel;
1597 if (srelgot == NULL)
1598 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1599 BFD_ASSERT (srelgot != NULL);
1600 loc = srelgot->contents;
1601 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1603 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1604 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1605 outrel.r_offset = (sgotplt->output_section->vma
1606 + sgotplt->output_offset
1608 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1609 outrel.r_addend = 0;
1610 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1614 /* For an executable, the GOT entry contents is known. */
1615 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1616 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1619 /* Reverse the sign to mark that we've emitted the
1620 required GOT entry. */
1621 htab->dtpmod_refcount = - htab->dtpmod_refcount;
1624 /* The relocation is the offset from the start of the module
1625 TLS block to the (local) symbol. */
1626 relocation -= elf_hash_table (info)->tls_sec == NULL
1627 ? 0 : elf_hash_table (info)->tls_sec->vma;
1633 bfd_set_error (bfd_error_invalid_operation);
1635 /* We've already informed in cris_elf_check_relocs that
1636 this is an error. */
1641 case R_CRIS_16_GOT_GD:
1642 case R_CRIS_32_GOT_GD:
1643 if (rel->r_addend != 0)
1645 /* We can't do anything for a relocation which is against a
1646 symbol *plus offset*. The GOT holds relocations for
1647 symbols. Make this an error; the compiler isn't allowed
1648 to pass us these kinds of things. */
1649 (*_bfd_error_handler)
1650 (_("%B, section %A: relocation %s with non-zero addend %d"
1651 " against symbol `%s'"),
1654 cris_elf_howto_table[r_type].name,
1656 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1658 bfd_set_error (bfd_error_bad_value);
1663 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1665 /* Known contents of the GOT. */
1668 /* The symbol is defined in the program, so just write
1669 (1, known_tpoffset) into the GOT. */
1670 relocation -= elf_hash_table (info)->tls_sec->vma;
1674 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1675 ? h->got.offset + 4 : h->got.offset;
1679 off = local_got_offsets[r_symndx];
1680 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1684 /* We use bit 1 of the offset as a flag for GOT entry with
1685 the R_CRIS_DTP reloc, setting it when we've emitted the
1686 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1695 local_got_offsets[r_symndx] |= 2;
1697 bfd_put_32 (output_bfd, 1, sgot->contents + off);
1698 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1703 relocation = sgot->output_offset + off
1704 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1708 /* Not all parts of the GOT entry are known; emit a real
1713 off = elf_cris_hash_entry (h)->tprel_refcount > 0
1714 ? h->got.offset + 4 : h->got.offset;
1717 off = local_got_offsets[r_symndx];
1718 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1722 /* See above re bit 1 and bit 0 usage. */
1725 Elf_Internal_Rela outrel;
1733 local_got_offsets[r_symndx] |= 2;
1735 /* Clear the target contents of the GOT (just as a
1736 gesture; it's already cleared on allocation): this
1737 relocation is not like the other dynrelocs. */
1738 bfd_put_32 (output_bfd, 0, sgot->contents + off);
1739 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1741 if (srelgot == NULL)
1742 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1743 BFD_ASSERT (srelgot != NULL);
1745 if (h != NULL && h->dynindx != -1)
1747 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1752 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1754 /* NULL if we had an error. */
1755 relocation -= elf_hash_table (info)->tls_sec == NULL
1756 ? 0 : elf_hash_table (info)->tls_sec->vma;
1759 outrel.r_offset = (sgot->output_section->vma
1760 + sgot->output_offset
1762 outrel.r_addend = relocation;
1763 loc = srelgot->contents;
1764 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1766 /* NULL if we had an error. */
1767 if (srelgot->contents != NULL)
1768 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1773 relocation = sgot->output_offset + off
1774 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1777 /* The GOT-relative offset to the GOT entry is the
1778 relocation, or for R_CRIS_32_GD, the actual address of
1785 bfd_set_error (bfd_error_invalid_operation);
1787 /* We've already informed in cris_elf_check_relocs that
1788 this is an error. */
1793 case R_CRIS_32_GOT_TPREL:
1794 case R_CRIS_16_GOT_TPREL:
1795 if (rel->r_addend != 0)
1797 /* We can't do anything for a relocation which is
1798 against a symbol *plus offset*. GOT holds
1799 relocations for symbols. Make this an error; the
1800 compiler isn't allowed to pass us these kinds of
1802 (*_bfd_error_handler)
1803 (_("%B, section %A: relocation %s with non-zero addend %d"
1804 " against symbol `%s'"),
1807 cris_elf_howto_table[r_type].name,
1809 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1810 bfd_set_error (bfd_error_bad_value);
1815 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1817 /* Known contents of the GOT. */
1820 /* The symbol is defined in the program, so just write
1821 the -prog_tls_size+known_tpoffset into the GOT. */
1822 relocation -= elf_hash_table (info)->tls_sec->vma;
1823 relocation -= elf_hash_table (info)->tls_size;
1826 off = h->got.offset;
1828 off = local_got_offsets[r_symndx];
1830 /* Bit 0 is used to mark whether we've emitted the required
1831 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1832 is used similarly for R_CRIS_DTP, see above. */
1840 local_got_offsets[r_symndx] |= 1;
1842 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1847 relocation = sgot->output_offset + off
1848 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1852 /* Emit a real relocation. */
1856 off = h->got.offset;
1858 off = local_got_offsets[r_symndx];
1860 /* See above re usage of bit 0 and 1. */
1863 Elf_Internal_Rela outrel;
1871 local_got_offsets[r_symndx] |= 1;
1873 if (srelgot == NULL)
1874 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1875 BFD_ASSERT (srelgot != NULL);
1877 if (h != NULL && h->dynindx != -1)
1879 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1884 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1886 /* NULL if we had an error. */
1887 relocation -= elf_hash_table (info)->tls_sec == NULL
1888 ? 0 : elf_hash_table (info)->tls_sec->vma;
1891 /* Just "define" the initial contents in some
1892 semi-logical way. */
1893 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1895 outrel.r_offset = (sgot->output_section->vma
1896 + sgot->output_offset
1898 outrel.r_addend = relocation;
1899 loc = srelgot->contents;
1900 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1901 /* NULL if we had an error. */
1902 if (srelgot->contents != NULL)
1903 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1908 relocation = sgot->output_offset + off
1909 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1912 /* The GOT-relative offset to the GOT entry is the relocation,
1913 or for R_CRIS_32_GD, the actual address of the GOT entry. */
1916 case R_CRIS_16_TPREL:
1917 case R_CRIS_32_TPREL:
1918 /* This relocation must only be performed against symbols
1919 defined in an ordinary (non-DSO) object. */
1922 bfd_set_error (bfd_error_invalid_operation);
1924 /* We've already informed in cris_elf_check_relocs that
1925 this is an error. */
1930 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1931 && !(h->def_regular || ELF_COMMON_DEF_P (h))
1932 /* If it's undefined, then an error message has already
1934 && h->root.type != bfd_link_hash_undefined)
1936 (*_bfd_error_handler)
1937 (_("%B, section %A: relocation %s is"
1938 " not allowed for symbol: `%s'"
1939 " which is defined outside the program,"
1940 " perhaps a declaration mixup?"),
1943 cris_elf_howto_table[r_type].name,
1945 bfd_set_error (bfd_error_bad_value);
1949 /* NULL if we had an error. */
1950 relocation -= elf_hash_table (info)->tls_sec == NULL
1952 : (elf_hash_table (info)->tls_sec->vma
1953 + elf_hash_table (info)->tls_size);
1955 /* The TLS-relative offset is the relocation. */
1963 r = cris_final_link_relocate (howto, input_bfd, input_section,
1964 contents, rel, relocation);
1966 if (r != bfd_reloc_ok)
1968 const char * msg = (const char *) NULL;
1972 case bfd_reloc_overflow:
1973 r = info->callbacks->reloc_overflow
1974 (info, (h ? &h->root : NULL), symname, howto->name,
1975 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1976 if (additional_relocation_error_msg_count > 0)
1978 additional_relocation_error_msg_count--;
1981 case R_CRIS_16_GOTPLT:
1984 /* Not just TLS is involved here, so we make
1985 generation and message depend on -fPIC/-fpic
1987 case R_CRIS_16_GOT_TPREL:
1988 case R_CRIS_16_GOT_GD:
1989 (*_bfd_error_handler)
1990 (_("(too many global variables for -fpic:"
1991 " recompile with -fPIC)"));
1994 case R_CRIS_16_TPREL:
1995 case R_CRIS_16_DTPREL:
1996 (*_bfd_error_handler)
1997 (_("(thread-local data too big for -fpic or"
1998 " -msmall-tls: recompile with -fPIC or"
1999 " -mno-small-tls)"));
2002 /* No known cause for overflow for other relocs. */
2009 case bfd_reloc_undefined:
2010 r = info->callbacks->undefined_symbol
2011 (info, symname, input_bfd, input_section, rel->r_offset,
2015 case bfd_reloc_outofrange:
2016 msg = _("internal error: out of range error");
2019 case bfd_reloc_notsupported:
2020 msg = _("internal error: unsupported relocation error");
2023 case bfd_reloc_dangerous:
2024 msg = _("internal error: dangerous relocation");
2028 msg = _("internal error: unknown error");
2033 r = info->callbacks->warning
2034 (info, msg, symname, input_bfd, input_section, rel->r_offset);
2044 /* Finish up dynamic symbol handling. We set the contents of various
2045 dynamic sections here. */
2048 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2049 struct bfd_link_info *info,
2050 struct elf_link_hash_entry *h,
2051 Elf_Internal_Sym *sym)
2053 struct elf_cris_link_hash_table * htab;
2056 /* Where in the plt entry to put values. */
2057 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2059 /* What offset to add to the distance to the first PLT entry for the
2060 value at plt_off3. */
2061 int plt_off3_value_bias = 4;
2063 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2064 for PIC and non-PIC for v32 and pre-v32). */
2065 int plt_stub_offset = 8;
2066 int plt_entry_size = PLT_ENTRY_SIZE;
2067 const bfd_byte *plt_entry = elf_cris_plt_entry;
2068 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2070 htab = elf_cris_hash_table (info);
2074 /* Adjust the various PLT entry offsets. */
2075 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2079 plt_off3_value_bias = -2;
2080 plt_stub_offset = 12;
2081 plt_entry_size = PLT_ENTRY_SIZE_V32;
2082 plt_entry = elf_cris_plt_entry_v32;
2083 plt_pic_entry = elf_cris_pic_plt_entry_v32;
2086 dynobj = elf_hash_table (info)->dynobj;
2088 if (h->plt.offset != (bfd_vma) -1)
2095 bfd_vma gotplt_offset
2096 = elf_cris_hash_entry (h)->gotplt_offset;
2097 Elf_Internal_Rela rela;
2099 bfd_boolean has_gotplt = gotplt_offset != 0;
2101 /* Get the index in the .rela.plt relocations for the .got.plt
2102 entry that corresponds to this symbol.
2103 We have to count backwards here, and the result is only valid
2104 as an index into .rela.plt. We also have to undo the effect
2105 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2106 .got.plt) for which gotplt_offset is adjusted, because while
2107 that entry goes into .got.plt, its relocation goes into
2108 .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2109 processed as part of the runtime lazy .rela.plt relocation).
2110 FIXME: There be literal constants here... */
2111 bfd_vma rela_plt_index
2112 = (htab->dtpmod_refcount != 0
2113 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2115 /* Get the offset into the .got table of the entry that corresponds
2116 to this function. Note that we embed knowledge that "incoming"
2117 .got goes after .got.plt in the output without padding (pointer
2118 aligned). However, that knowledge is present in several other
2123 : h->got.offset + htab->next_gotplt_entry);
2125 /* This symbol has an entry in the procedure linkage table. Set it
2128 BFD_ASSERT (h->dynindx != -1);
2130 splt = bfd_get_linker_section (dynobj, ".plt");
2131 sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2132 srela = bfd_get_linker_section (dynobj, ".rela.plt");
2133 BFD_ASSERT (splt != NULL && sgotplt != NULL
2134 && (! has_gotplt || srela != NULL));
2136 got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2138 /* Fill in the entry in the procedure linkage table. */
2141 memcpy (splt->contents + h->plt.offset, plt_entry,
2144 /* We need to enter the absolute address of the GOT entry here. */
2145 bfd_put_32 (output_bfd, got_base + got_offset,
2146 splt->contents + h->plt.offset + plt_off1);
2150 memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2152 bfd_put_32 (output_bfd, got_offset,
2153 splt->contents + h->plt.offset + plt_off1);
2156 /* Fill in the plt entry and make a relocation, if this is a "real"
2160 /* Fill in the offset to the reloc table. */
2161 bfd_put_32 (output_bfd,
2162 rela_plt_index * sizeof (Elf32_External_Rela),
2163 splt->contents + h->plt.offset + plt_off2);
2165 /* Fill in the offset to the first PLT entry, where to "jump". */
2166 bfd_put_32 (output_bfd,
2167 - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2168 splt->contents + h->plt.offset + plt_off3);
2170 /* Fill in the entry in the global offset table with the address of
2171 the relocating stub. */
2172 bfd_put_32 (output_bfd,
2173 (splt->output_section->vma
2174 + splt->output_offset
2177 sgotplt->contents + got_offset);
2179 /* Fill in the entry in the .rela.plt section. */
2180 rela.r_offset = (sgotplt->output_section->vma
2181 + sgotplt->output_offset
2183 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2185 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2186 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2189 if (!h->def_regular)
2191 /* Mark the symbol as undefined, rather than as defined in
2192 the .plt section. Leave the value alone. */
2193 sym->st_shndx = SHN_UNDEF;
2195 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2196 know whether resetting the value is significant; if it really
2197 is, rather than a quirk or bug in the sparc port, then I
2198 believe we'd see this elsewhere. */
2199 /* If the symbol is weak, we do need to clear the value.
2200 Otherwise, the PLT entry would provide a definition for
2201 the symbol even if the symbol wasn't defined anywhere,
2202 and so the symbol would never be NULL. */
2203 if (!h->ref_regular_nonweak)
2208 /* For an ordinary program, we emit .got relocs only for symbols that
2209 are in the dynamic-symbols table and are either defined by the
2210 program or are undefined weak symbols, or are function symbols
2211 where we do not output a PLT: the PLT reloc was output above and all
2212 references to the function symbol are redirected to the PLT. */
2213 if (h->got.offset != (bfd_vma) -1
2214 && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2216 || (h->dynindx != -1
2217 && h->plt.offset == (bfd_vma) -1
2219 && h->root.type != bfd_link_hash_undefweak)))
2223 Elf_Internal_Rela rela;
2227 /* This symbol has an entry in the global offset table. Set it up. */
2229 sgot = bfd_get_linker_section (dynobj, ".got");
2230 srela = bfd_get_linker_section (dynobj, ".rela.got");
2231 BFD_ASSERT (sgot != NULL && srela != NULL);
2233 rela.r_offset = (sgot->output_section->vma
2234 + sgot->output_offset
2235 + (h->got.offset &~ (bfd_vma) 1));
2237 /* If this is a static link, or it is a -Bsymbolic link and the
2238 symbol is defined locally or was forced to be local because
2239 of a version file, we just want to emit a RELATIVE reloc.
2240 The entry in the global offset table will already have been
2241 initialized in the relocate_section function. */
2242 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2243 if (! elf_hash_table (info)->dynamic_sections_created
2245 && (info->symbolic || h->dynindx == -1)
2248 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2249 rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2253 bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2254 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2258 loc = srela->contents;
2259 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2260 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2266 Elf_Internal_Rela rela;
2269 /* This symbol needs a copy reloc. Set it up. */
2271 BFD_ASSERT (h->dynindx != -1
2272 && (h->root.type == bfd_link_hash_defined
2273 || h->root.type == bfd_link_hash_defweak));
2275 s = bfd_get_linker_section (dynobj, ".rela.bss");
2276 BFD_ASSERT (s != NULL);
2278 rela.r_offset = (h->root.u.def.value
2279 + h->root.u.def.section->output_section->vma
2280 + h->root.u.def.section->output_offset);
2281 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2283 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2284 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2287 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2288 if (h == elf_hash_table (info)->hdynamic
2289 || h == elf_hash_table (info)->hgot)
2290 sym->st_shndx = SHN_ABS;
2295 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2296 offsets were changed, as part of -z combreloc handling, from those we
2300 elf_cris_finish_dynamic_sections (bfd *output_bfd,
2301 struct bfd_link_info *info)
2307 dynobj = elf_hash_table (info)->dynobj;
2309 sgot = bfd_get_linker_section (dynobj, ".got.plt");
2310 BFD_ASSERT (sgot != NULL);
2311 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2313 if (elf_hash_table (info)->dynamic_sections_created)
2316 Elf32_External_Dyn *dyncon, *dynconend;
2318 splt = bfd_get_linker_section (dynobj, ".plt");
2319 BFD_ASSERT (splt != NULL && sdyn != NULL);
2321 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2322 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2323 for (; dyncon < dynconend; dyncon++)
2325 Elf_Internal_Dyn dyn;
2328 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2336 s = bfd_get_section_by_name (output_bfd, ".got");
2337 BFD_ASSERT (s != NULL);
2338 dyn.d_un.d_ptr = s->vma;
2339 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2343 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2344 if all symbols are found in the .got (not .got.plt). */
2345 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2346 dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2347 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2351 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2355 dyn.d_un.d_val = s->size;
2356 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2360 /* The procedure linkage table relocs (DT_JMPREL) should
2361 not be included in the overall relocs (DT_RELA).
2362 Therefore, we override the DT_RELASZ entry here to
2363 make it not include the JMPREL relocs. Since the
2364 linker script arranges for .rela.plt to follow all
2365 other relocation sections, we don't have to worry
2366 about changing the DT_RELA entry. */
2367 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2369 dyn.d_un.d_val -= s->size;
2370 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2375 /* Fill in the first entry in the procedure linkage table. */
2378 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2381 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2382 PLT_ENTRY_SIZE_V32);
2385 memcpy (splt->contents, elf_cris_plt0_entry_v32,
2386 PLT_ENTRY_SIZE_V32);
2387 bfd_put_32 (output_bfd,
2388 sgot->output_section->vma
2389 + sgot->output_offset + 4,
2390 splt->contents + 4);
2392 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2393 = PLT_ENTRY_SIZE_V32;
2399 memcpy (splt->contents, elf_cris_pic_plt0_entry,
2403 memcpy (splt->contents, elf_cris_plt0_entry,
2405 bfd_put_32 (output_bfd,
2406 sgot->output_section->vma
2407 + sgot->output_offset + 4,
2408 splt->contents + 6);
2409 bfd_put_32 (output_bfd,
2410 sgot->output_section->vma
2411 + sgot->output_offset + 8,
2412 splt->contents + 14);
2414 elf_section_data (splt->output_section)->this_hdr.sh_entsize
2421 /* Fill in the first three entries in the global offset table. */
2425 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2427 bfd_put_32 (output_bfd,
2428 sdyn->output_section->vma + sdyn->output_offset,
2430 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2431 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2434 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2439 /* Return the section that should be marked against GC for a given
2443 cris_elf_gc_mark_hook (asection *sec,
2444 struct bfd_link_info *info,
2445 Elf_Internal_Rela *rel,
2446 struct elf_link_hash_entry *h,
2447 Elf_Internal_Sym *sym)
2449 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2453 case R_CRIS_GNU_VTINHERIT:
2454 case R_CRIS_GNU_VTENTRY:
2461 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2464 /* Update the got entry reference counts for the section being removed. */
2467 cris_elf_gc_sweep_hook (bfd *abfd,
2468 struct bfd_link_info *info,
2470 const Elf_Internal_Rela *relocs)
2472 struct elf_cris_link_hash_table * htab;
2473 Elf_Internal_Shdr *symtab_hdr;
2474 struct elf_link_hash_entry **sym_hashes;
2475 bfd_signed_vma *local_got_refcounts;
2476 const Elf_Internal_Rela *rel, *relend;
2481 if (info->relocatable)
2484 dynobj = elf_hash_table (info)->dynobj;
2488 htab = elf_cris_hash_table (info);
2492 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2493 sym_hashes = elf_sym_hashes (abfd);
2494 local_got_refcounts = elf_local_got_refcounts (abfd);
2496 sgot = bfd_get_linker_section (dynobj, ".got");
2497 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2499 relend = relocs + sec->reloc_count;
2500 for (rel = relocs; rel < relend; rel++)
2502 unsigned long r_symndx;
2503 struct elf_link_hash_entry *h = NULL;
2504 bfd_signed_vma got_element_size = 4;
2505 bfd_signed_vma *specific_refcount = NULL;
2506 enum elf_cris_reloc_type r_type;
2508 r_symndx = ELF32_R_SYM (rel->r_info);
2509 if (r_symndx >= symtab_hdr->sh_info)
2511 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2512 while (h->root.type == bfd_link_hash_indirect
2513 || h->root.type == bfd_link_hash_warning)
2514 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2517 r_type = ELF32_R_TYPE (rel->r_info);
2522 case R_CRIS_16_GOTPLT:
2523 case R_CRIS_32_GOTPLT:
2524 specific_refcount = h != NULL
2525 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2526 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2530 case R_CRIS_32_GOT_GD:
2531 case R_CRIS_16_GOT_GD:
2532 got_element_size = 8;
2533 specific_refcount = h != NULL
2534 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2535 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2539 case R_CRIS_16_GOT_TPREL:
2540 case R_CRIS_32_GOT_TPREL:
2541 specific_refcount = h != NULL
2542 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2543 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2554 case R_CRIS_16_GOT_TPREL:
2555 case R_CRIS_32_GOT_TPREL:
2556 case R_CRIS_32_GOT_GD:
2557 case R_CRIS_16_GOT_GD:
2562 /* If the counters are 0 when we got here, we've
2563 miscounted somehow somewhere, an internal error. */
2564 BFD_ASSERT (h->got.refcount > 0);
2567 BFD_ASSERT (*specific_refcount > 0);
2568 --*specific_refcount;
2569 if (*specific_refcount == 0)
2571 /* We don't need the .got entry any more. */
2572 sgot->size -= got_element_size;
2573 srelgot->size -= sizeof (Elf32_External_Rela);
2579 if (local_got_refcounts != NULL)
2581 /* If the counters are 0 when we got here, we've
2582 miscounted somehow somewhere, an internal error. */
2583 BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2584 --local_got_refcounts[r_symndx];
2586 BFD_ASSERT (*specific_refcount > 0);
2587 --*specific_refcount;
2588 if (*specific_refcount == 0)
2590 /* We don't need the .got entry any more. */
2591 sgot->size -= got_element_size;
2593 srelgot->size -= sizeof (Elf32_External_Rela);
2598 case R_CRIS_16_GOTPLT:
2599 case R_CRIS_32_GOTPLT:
2600 /* For local symbols, treat these like GOT relocs. */
2602 goto local_got_reloc;
2604 /* For global symbols, adjust the reloc-specific refcount. */
2605 elf_cris_hash_entry (h)->gotplt_refcount--;
2608 case R_CRIS_32_PLT_GOTREL:
2609 /* FIXME: We don't garbage-collect away the .got section. */
2610 if (local_got_refcounts != NULL)
2611 local_got_refcounts[-1]--;
2617 case R_CRIS_8_PCREL:
2618 case R_CRIS_16_PCREL:
2619 case R_CRIS_32_PCREL:
2620 case R_CRIS_32_PLT_PCREL:
2621 /* Negate the increment we did in cris_elf_check_relocs. */
2624 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2625 && h->plt.refcount > 0)
2630 case R_CRIS_32_DTPREL:
2631 /* This'd be a .dtpreld entry in e.g. debug info. */
2632 if ((sec->flags & SEC_ALLOC) == 0)
2635 case R_CRIS_16_DTPREL:
2636 htab->dtpmod_refcount--;
2637 if (htab->dtpmod_refcount == 0)
2638 htab->next_gotplt_entry -= 8;
2639 BFD_ASSERT (local_got_refcounts != NULL);
2640 local_got_refcounts[-1]--;
2651 /* The elf_backend_plt_sym_val hook function. */
2654 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2657 bfd_size_type plt_entry_size;
2658 bfd_size_type pltoffs;
2659 bfd *abfd = plt->owner;
2661 /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */
2662 bfd_size_type plt_entry_got_offset = 2;
2663 bfd_size_type plt_sec_size;
2664 bfd_size_type got_vma_for_dyn;
2667 /* FIXME: the .got section should be readily available also when
2668 we're not linking. */
2669 if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2670 return (bfd_vma) -1;
2672 plt_sec_size = bfd_section_size (plt->owner, plt);
2674 = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2675 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2677 /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */
2678 got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2680 /* Because we can have merged GOT entries; a single .got entry for
2681 both GOT and the PLT part of the GOT (.got.plt), the index of the
2682 reloc in .rela.plt is not the same as the index in the PLT.
2683 Instead, we have to hunt down the GOT offset in the PLT that
2684 corresponds to that of this reloc. Unfortunately, we will only
2685 be called for the .rela.plt relocs, so we'll miss synthetic
2686 symbols for .plt entries with merged GOT entries. (FIXME:
2687 fixable by providing our own bfd_elf32_get_synthetic_symtab.
2688 Doesn't seem worthwile at time of this writing.) FIXME: we've
2689 gone from O(1) to O(N) (N number of PLT entries) for finding each
2690 PLT address. Shouldn't matter in practice though. */
2692 for (pltoffs = plt_entry_size;
2693 pltoffs < plt_sec_size;
2694 pltoffs += plt_entry_size)
2696 bfd_size_type got_offset;
2697 bfd_byte gotoffs_raw[4];
2699 if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2700 pltoffs + plt_entry_got_offset,
2701 sizeof (gotoffs_raw)))
2702 return (bfd_vma) -1;
2704 got_offset = bfd_get_32 (abfd, gotoffs_raw);
2705 if (got_offset + got_vma_for_dyn == rel->address)
2706 return plt->vma + pltoffs;
2709 /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2710 that'd not be graceful behavior for invalid input. */
2711 return (bfd_vma) -1;
2714 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2715 entry but we found we will not create any. Called when we find we will
2716 not have any PLT for this symbol, by for example
2717 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2718 or elf_cris_size_dynamic_sections if no dynamic sections will be
2719 created (we're only linking static objects). */
2722 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2724 struct bfd_link_info *info = (struct bfd_link_info *) p;
2726 /* A GOTPLT reloc, when activated, is supposed to be included into
2727 the PLT refcount. */
2728 BFD_ASSERT (h->gotplt_refcount == 0
2729 || h->gotplt_refcount <= h->root.plt.refcount);
2731 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2732 if (h->gotplt_refcount <= 0)
2735 if (h->reg_got_refcount > 0)
2737 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2738 Probably not necessary at this stage, but keeping them accurate
2739 helps avoiding surprises later. */
2740 h->root.got.refcount += h->gotplt_refcount;
2741 h->reg_got_refcount += h->gotplt_refcount;
2742 h->gotplt_refcount = 0;
2746 /* No GOT entry for this symbol. We need to create one. */
2747 bfd *dynobj = elf_hash_table (info)->dynobj;
2751 BFD_ASSERT (dynobj != NULL);
2752 sgot = bfd_get_linker_section (dynobj, ".got");
2753 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2755 /* Put accurate refcounts there. */
2756 h->root.got.refcount += h->gotplt_refcount;
2757 h->reg_got_refcount = h->gotplt_refcount;
2759 h->gotplt_refcount = 0;
2761 /* We always have a .got and a .rela.got section if there were
2762 GOTPLT relocs in input. */
2763 BFD_ASSERT (sgot != NULL && srelgot != NULL);
2765 /* Allocate space in the .got section. */
2768 /* Allocate relocation space. */
2769 srelgot->size += sizeof (Elf32_External_Rela);
2775 /* Try to fold PLT entries with GOT entries. There are two cases when we
2778 - When all PLT references are GOTPLT references, and there are GOT
2779 references, and this is not the executable. We don't have to
2780 generate a PLT at all.
2782 - When there are both (ordinary) PLT references and GOT references,
2783 and this isn't the executable.
2784 We want to make the PLT reference use the ordinary GOT entry rather
2785 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2786 since the GOT entry will have to be resolved at startup anyway.
2788 Though the latter case is handled when room for the PLT is allocated,
2791 By folding into the GOT, we may need a round-trip to a PLT in the
2792 executable for calls, a loss in performance. Still, losing a
2793 reloc is a win in size and at least in start-up time.
2795 Note that this function is called before symbols are forced local by
2796 version scripts. The differing cases are handled by
2797 elf_cris_hide_symbol. */
2800 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2802 struct bfd_link_info *info = (struct bfd_link_info *) p;
2804 /* If there are no GOT references for this symbol, we can't fold any
2805 other reference so there's nothing to do. Likewise if there are no
2806 PLT references; GOTPLT references included. */
2807 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2810 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2811 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2813 if (h->gotplt_refcount == h->root.plt.refcount)
2815 /* The only PLT references are GOTPLT references, and there are GOT
2816 references. Convert PLT to GOT references. */
2817 if (! elf_cris_adjust_gotplt_to_got (h, info))
2820 /* Clear the PLT references, so no PLT will be created. */
2821 h->root.plt.offset = (bfd_vma) -1;
2827 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2828 to use a GOT entry (and create one) rather than requiring a GOTPLT
2832 elf_cris_hide_symbol (struct bfd_link_info *info,
2833 struct elf_link_hash_entry *h,
2834 bfd_boolean force_local)
2836 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2838 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2841 /* Adjust a symbol defined by a dynamic object and referenced by a
2842 regular object. The current definition is in some section of the
2843 dynamic object, but we're not including those sections. We have to
2844 change the definition to something the rest of the link can
2848 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2849 struct elf_link_hash_entry *h)
2851 struct elf_cris_link_hash_table * htab;
2854 bfd_size_type plt_entry_size;
2856 htab = elf_cris_hash_table (info);
2860 dynobj = elf_hash_table (info)->dynobj;
2862 /* Make sure we know what is going on here. */
2863 BFD_ASSERT (dynobj != NULL
2865 || h->u.weakdef != NULL
2868 && !h->def_regular)));
2871 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2872 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2874 /* If this is a function, put it in the procedure linkage table. We
2875 will fill in the contents of the procedure linkage table later,
2876 when we know the address of the .got section. */
2877 if (h->type == STT_FUNC
2880 /* If we link a program (not a DSO), we'll get rid of unnecessary
2881 PLT entries; we point to the actual symbols -- even for pic
2882 relocs, because a program built with -fpic should have the same
2883 result as one built without -fpic, specifically considering weak
2885 FIXME: m68k and i386 differ here, for unclear reasons. */
2889 /* This case can occur if we saw a PLT reloc in an input file,
2890 but the symbol was not defined by a dynamic object. In such
2891 a case, we don't actually need to build a procedure linkage
2892 table, and we can just do an absolute or PC reloc instead, or
2893 change a .got.plt index to a .got index for GOTPLT relocs. */
2894 BFD_ASSERT (h->needs_plt);
2896 h->plt.offset = (bfd_vma) -1;
2898 elf_cris_adjust_gotplt_to_got ((struct
2899 elf_cris_link_hash_entry *) h,
2903 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2904 where a pointer-equivalent symbol was unimportant (i.e. more
2905 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2906 of the PLT. We can't for the executable, because the GOT
2907 entries will point to the PLT there (and be constant). */
2909 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2913 /* GC or folding may have rendered this entry unused. */
2914 if (h->plt.refcount <= 0)
2917 h->plt.offset = (bfd_vma) -1;
2921 /* Make sure this symbol is output as a dynamic symbol. */
2922 if (h->dynindx == -1)
2924 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2928 s = bfd_get_linker_section (dynobj, ".plt");
2929 BFD_ASSERT (s != NULL);
2931 /* If this is the first .plt entry, make room for the special
2934 s->size += plt_entry_size;
2936 /* If this symbol is not defined in a regular file, and we are
2937 not generating a shared library, then set the symbol to this
2938 location in the .plt. */
2942 h->root.u.def.section = s;
2943 h->root.u.def.value = s->size;
2946 /* If there's already a GOT entry, use that, not a .got.plt. A
2947 GOT field still has a reference count when we get here; it's
2948 not yet changed to an offset. We can't do this for an
2949 executable, because then the reloc associated with the PLT
2950 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2951 this to elf_cris_try_fold_plt_to_got. */
2952 if (info->shared && h->got.refcount > 0)
2954 h->got.refcount += h->plt.refcount;
2956 /* Mark the PLT offset to use the GOT entry by setting the low
2957 bit in the plt offset; it is always a multiple of
2958 plt_entry_size (which is at least a multiple of 2). */
2959 BFD_ASSERT ((s->size % plt_entry_size) == 0);
2961 /* Change the PLT refcount to an offset. */
2962 h->plt.offset = s->size;
2964 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2965 that the got entry should be used instead. */
2966 BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2967 h)->gotplt_offset == 0);
2969 /* Make room for this entry. */
2970 s->size += plt_entry_size;
2975 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2976 h->plt.offset = s->size;
2978 /* Make room for this entry. */
2979 s->size += plt_entry_size;
2981 /* We also need to make an entry in the .got.plt section, which
2982 will be placed in the .got section by the linker script. */
2983 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2984 = htab->next_gotplt_entry;
2985 htab->next_gotplt_entry += 4;
2987 s = bfd_get_linker_section (dynobj, ".got.plt");
2988 BFD_ASSERT (s != NULL);
2991 /* We also need to make an entry in the .rela.plt section. */
2993 s = bfd_get_linker_section (dynobj, ".rela.plt");
2994 BFD_ASSERT (s != NULL);
2995 s->size += sizeof (Elf32_External_Rela);
3000 /* Reinitialize the plt offset now that it is not used as a reference
3002 h->plt.offset = (bfd_vma) -1;
3004 /* If this is a weak symbol, and there is a real definition, the
3005 processor independent code will have arranged for us to see the
3006 real definition first, and we can just use the same value. */
3007 if (h->u.weakdef != NULL)
3009 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3010 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3011 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3012 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3016 /* This is a reference to a symbol defined by a dynamic object which
3017 is not a function. */
3019 /* If we are creating a shared library, we must presume that the
3020 only references to the symbol are via the global offset table.
3021 For such cases we need not do anything here; the relocations will
3022 be handled correctly by relocate_section. */
3026 /* If there are no references to this symbol that do not use the
3027 GOT, we don't need to generate a copy reloc. */
3028 if (!h->non_got_ref)
3031 /* We must allocate the symbol in our .dynbss section, which will
3032 become part of the .bss section of the executable. There will be
3033 an entry for this symbol in the .dynsym section. The dynamic
3034 object will contain position independent code, so all references
3035 from the dynamic object to this symbol will go through the global
3036 offset table. The dynamic linker will use the .dynsym entry to
3037 determine the address it must put in the global offset table, so
3038 both the dynamic object and the regular object will refer to the
3039 same memory location for the variable. */
3041 s = bfd_get_linker_section (dynobj, ".dynbss");
3042 BFD_ASSERT (s != NULL);
3044 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3045 copy the initial value out of the dynamic object and into the
3046 runtime process image. We need to remember the offset into the
3047 .rela.bss section we are going to use. */
3048 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3052 srel = bfd_get_linker_section (dynobj, ".rela.bss");
3053 BFD_ASSERT (srel != NULL);
3054 srel->size += sizeof (Elf32_External_Rela);
3058 return _bfd_elf_adjust_dynamic_copy (h, s);
3061 /* Adjust our "subclass" elements for an indirect symbol. */
3064 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3065 struct elf_link_hash_entry *dir,
3066 struct elf_link_hash_entry *ind)
3068 struct elf_cris_link_hash_entry *edir, *eind;
3070 edir = (struct elf_cris_link_hash_entry *) dir;
3071 eind = (struct elf_cris_link_hash_entry *) ind;
3073 /* Only indirect symbols are replaced; we're not interested in
3074 updating any of EIND's fields for other symbols. */
3075 if (eind->root.root.type != bfd_link_hash_indirect)
3077 /* Still, we need to copy flags for e.g. weak definitions. */
3078 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3082 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3084 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3085 #define XMOVE(F) XMOVOPZ (F, +=, 0)
3086 if (eind->pcrel_relocs_copied != NULL)
3088 if (edir->pcrel_relocs_copied != NULL)
3090 struct elf_cris_pcrel_relocs_copied **pp;
3091 struct elf_cris_pcrel_relocs_copied *p;
3093 /* Add reloc counts against the indirect sym to the direct sym
3094 list. Merge any entries against the same section. */
3095 for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
3097 struct elf_cris_pcrel_relocs_copied *q;
3099 for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
3100 if (q->section == p->section)
3102 q->count += p->count;
3109 *pp = edir->pcrel_relocs_copied;
3111 XMOVOPZ (pcrel_relocs_copied, =, NULL);
3113 XMOVE (gotplt_refcount);
3114 XMOVE (gotplt_offset);
3115 XMOVE (reg_got_refcount);
3116 XMOVE (tprel_refcount);
3117 XMOVE (dtp_refcount);
3121 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3124 /* Look through the relocs for a section during the first phase. */
3127 cris_elf_check_relocs (bfd *abfd,
3128 struct bfd_link_info *info,
3130 const Elf_Internal_Rela *relocs)
3132 struct elf_cris_link_hash_table * htab;
3134 Elf_Internal_Shdr *symtab_hdr;
3135 struct elf_link_hash_entry **sym_hashes;
3136 bfd_signed_vma *local_got_refcounts;
3137 const Elf_Internal_Rela *rel;
3138 const Elf_Internal_Rela *rel_end;
3143 if (info->relocatable)
3146 htab = elf_cris_hash_table (info);
3150 dynobj = elf_hash_table (info)->dynobj;
3151 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3152 sym_hashes = elf_sym_hashes (abfd);
3153 local_got_refcounts = elf_local_got_refcounts (abfd);
3159 rel_end = relocs + sec->reloc_count;
3160 for (rel = relocs; rel < rel_end; rel++)
3162 struct elf_link_hash_entry *h;
3163 unsigned long r_symndx;
3164 enum elf_cris_reloc_type r_type;
3165 bfd_signed_vma got_element_size = 4;
3166 unsigned long r_symndx_lgot = INT_MAX;
3168 r_symndx = ELF32_R_SYM (rel->r_info);
3169 if (r_symndx < symtab_hdr->sh_info)
3172 r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3176 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3177 while (h->root.type == bfd_link_hash_indirect
3178 || h->root.type == bfd_link_hash_warning)
3179 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3181 /* PR15323, ref flags aren't set for references in the same
3183 h->root.non_ir_ref = 1;
3186 r_type = ELF32_R_TYPE (rel->r_info);
3188 /* Some relocs require linker-created sections; we need to hang them
3189 on the first input bfd we found that contained dynamic relocs. */
3192 case R_CRIS_32_DTPREL:
3193 if ((sec->flags & SEC_ALLOC) == 0)
3194 /* This'd be a .dtpreld entry in e.g. debug info. We have
3195 several different switch statements below, but none of
3196 that is needed; we need no preparations for resolving
3197 R_CRIS_32_DTPREL into a non-allocated section (debug
3198 info), so let's just move on to the next
3202 case R_CRIS_16_DTPREL:
3203 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3204 entry at index 3. */
3205 if (htab->dtpmod_refcount == 0)
3206 htab->next_gotplt_entry += 8;
3208 htab->dtpmod_refcount++;
3213 case R_CRIS_16_GOT_GD:
3214 case R_CRIS_32_GOT_GD:
3215 case R_CRIS_32_GOT_TPREL:
3216 case R_CRIS_16_GOT_TPREL:
3219 case R_CRIS_32_GOTREL:
3220 case R_CRIS_32_PLT_GOTREL:
3221 case R_CRIS_32_PLT_PCREL:
3222 case R_CRIS_16_GOTPLT:
3223 case R_CRIS_32_GOTPLT:
3226 elf_hash_table (info)->dynobj = dynobj = abfd;
3228 /* We could handle this if we can get a handle on the
3229 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3230 that, we must insist on dynobj being a specific mach. */
3231 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3233 (*_bfd_error_handler)
3234 (_("%B, section %A:\n v10/v32 compatible object %s"
3235 " must not contain a PIC relocation"),
3240 /* Create the .got section, so we can assume it's always
3241 present whenever there's a dynobj. */
3242 if (!_bfd_elf_create_got_section (dynobj, info))
3247 sgot = bfd_get_linker_section (dynobj, ".got");
3249 if (local_got_refcounts == NULL)
3253 /* We use index local_got_refcounts[-1] to count all
3254 GOT-relative relocations that do not have explicit
3256 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3257 amt *= sizeof (bfd_signed_vma);
3258 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3259 if (local_got_refcounts == NULL)
3262 local_got_refcounts++;
3263 elf_local_got_refcounts (abfd) = local_got_refcounts;
3271 /* Some relocs require a global offset table (but perhaps not a
3272 specific GOT entry). */
3275 case R_CRIS_16_DTPREL:
3276 case R_CRIS_32_DTPREL:
3277 /* Not requesting .got.rela for an executable: the contents
3278 of the first entry is constant there. For a shared
3279 library, we need .got.rela for the R_CRIS_DTPMOD
3280 relocation at index 3. */
3287 case R_CRIS_16_GOT_GD:
3288 case R_CRIS_32_GOT_GD:
3289 case R_CRIS_32_GOT_TPREL:
3290 case R_CRIS_16_GOT_TPREL:
3293 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3294 entry only for local symbols. Unfortunately, we don't know
3295 until later on if there's a version script that forces the
3296 symbol local. We must have the .rela.got section in place
3297 before we know if the symbol looks global now, so we need
3298 to treat the reloc just like for R_CRIS_16_GOT and
3300 case R_CRIS_16_GOTPLT:
3301 case R_CRIS_32_GOTPLT:
3305 && (h != NULL || info->shared))
3307 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
3308 if (srelgot == NULL)
3310 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3311 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3313 srelgot = bfd_make_section_anyway_with_flags (dynobj,
3317 || !bfd_set_section_alignment (dynobj, srelgot, 2))
3327 /* Warn and error for invalid input. */
3331 case R_CRIS_32_TPREL:
3332 case R_CRIS_16_TPREL:
3336 (*_bfd_error_handler)
3337 (_("%B, section %A:\n relocation %s not valid"
3338 " in a shared object;"
3339 " typically an option mixup, recompile with -fPIC"),
3342 cris_elf_howto_table[r_type].name);
3343 /* Don't return FALSE here; we want messages for all of
3344 these and the error behavior is ungraceful
3354 case R_CRIS_16_GOT_GD:
3355 case R_CRIS_32_GOT_GD:
3356 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3357 got_element_size = 8;
3358 r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3361 case R_CRIS_16_DTPREL:
3362 case R_CRIS_32_DTPREL:
3363 /* These two just request for the constant-index
3364 module-local tls_index-sized GOT entry, which we add
3369 case R_CRIS_32_GOT_TPREL:
3370 case R_CRIS_16_GOT_TPREL:
3371 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3373 /* Those relocs also require that a DSO is of type
3374 Initial Exec. Like other targets, we don't reset this
3375 flag even if the relocs are GC:ed away. */
3377 info->flags |= DF_STATIC_TLS;
3380 /* Let's list the other assembler-generated TLS-relocs too,
3381 just to show that they're not forgotten. */
3382 case R_CRIS_16_TPREL:
3383 case R_CRIS_32_TPREL:
3390 case R_CRIS_16_GOTPLT:
3391 case R_CRIS_32_GOTPLT:
3392 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3393 entry) is eliminated. We can only do this for a non-local
3397 elf_cris_hash_entry (h)->gotplt_refcount++;
3398 goto handle_gotplt_reloc;
3400 /* If h is NULL then this is a local symbol, and we must make a
3401 GOT entry for it, so handle it like a GOT reloc. */
3406 case R_CRIS_16_GOT_GD:
3407 case R_CRIS_32_GOT_GD:
3408 case R_CRIS_32_GOT_TPREL:
3409 case R_CRIS_16_GOT_TPREL:
3412 /* This symbol requires a global offset table entry. */
3415 if (h->got.refcount == 0)
3417 /* Make sure this symbol is output as a dynamic symbol. */
3418 if (h->dynindx == -1)
3420 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3425 /* Update the sum of reloc counts for this symbol. */
3432 if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3434 /* Allocate space in the .got section. */
3435 sgot->size += got_element_size;
3436 /* Allocate relocation space. */
3437 srelgot->size += sizeof (Elf32_External_Rela);
3439 elf_cris_hash_entry (h)->reg_got_refcount++;
3443 case R_CRIS_16_GOT_GD:
3444 case R_CRIS_32_GOT_GD:
3445 if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3447 /* Allocate space in the .got section. */
3448 sgot->size += got_element_size;
3449 /* Allocate relocation space. */
3450 srelgot->size += sizeof (Elf32_External_Rela);
3452 elf_cris_hash_entry (h)->dtp_refcount++;
3456 case R_CRIS_32_GOT_TPREL:
3457 case R_CRIS_16_GOT_TPREL:
3458 if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3460 /* Allocate space in the .got section. */
3461 sgot->size += got_element_size;
3462 /* Allocate relocation space. */
3463 srelgot->size += sizeof (Elf32_External_Rela);
3465 elf_cris_hash_entry (h)->tprel_refcount++;
3475 /* This is a global offset table entry for a local symbol. */
3476 if (local_got_refcounts[r_symndx_lgot] == 0)
3478 sgot->size += got_element_size;
3481 /* If we are generating a shared object, we need
3482 to output a R_CRIS_RELATIVE reloc so that the
3483 dynamic linker can adjust this GOT entry.
3484 Similarly for non-regular got entries. */
3485 srelgot->size += sizeof (Elf32_External_Rela);
3488 /* Update the reloc-specific count. */
3489 local_got_refcounts[r_symndx_lgot]++;
3491 /* This one is the sum of all the others. */
3492 local_got_refcounts[r_symndx]++;
3496 case R_CRIS_16_DTPREL:
3497 case R_CRIS_32_DTPREL:
3498 case R_CRIS_32_GOTREL:
3499 /* This reference requires a global offset table.
3500 FIXME: The actual refcount isn't used currently; the .got
3501 section can't be removed if there were any references in the
3503 local_got_refcounts[-1]++;
3506 handle_gotplt_reloc:
3508 case R_CRIS_32_PLT_GOTREL:
3509 /* This reference requires a global offset table. */
3510 local_got_refcounts[-1]++;
3513 case R_CRIS_32_PLT_PCREL:
3514 /* This symbol requires a procedure linkage table entry. We
3515 actually build the entry in adjust_dynamic_symbol,
3516 because this might be a case of linking PIC code which is
3517 never referenced by a dynamic object, in which case we
3518 don't need to generate a procedure linkage table entry
3521 /* Beware: if we'd check for visibility of the symbol here
3522 (and not marking the need for a PLT when non-visible), we'd
3523 get into trouble with keeping handling consistent with
3524 regards to relocs found before definition and GOTPLT
3525 handling. Eliminable PLT entries will be dealt with later
3537 /* Let's help debug shared library creation. Any of these
3538 relocs *can* be used in shared libs, but pages containing
3539 them cannot be shared, so they're not appropriate for
3540 common use. Don't warn for sections we don't care about,
3541 such as debug sections or non-constant sections. We
3542 can't help tables of (global) function pointers, for
3543 example, though they must be emitted in a (writable) data
3544 section to avoid having impure text sections. */
3546 && (sec->flags & SEC_ALLOC) != 0
3547 && (sec->flags & SEC_READONLY) != 0)
3549 /* FIXME: How do we make this optionally a warning only? */
3550 (*_bfd_error_handler)
3551 (_("%B, section %A:\n relocation %s should not"
3552 " be used in a shared object; recompile with -fPIC"),
3555 cris_elf_howto_table[r_type].name);
3558 /* We don't need to handle relocs into sections not going into
3559 the "real" output. */
3560 if ((sec->flags & SEC_ALLOC) == 0)
3567 /* Make sure a plt entry is created for this symbol if it
3568 turns out to be a function defined by a dynamic object. */
3569 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3573 /* If we are creating a shared library and this is not a local
3574 symbol, we need to copy the reloc into the shared library.
3575 However when linking with -Bsymbolic and this is a global
3576 symbol which is defined in an object we are including in the
3577 link (i.e., DEF_REGULAR is set), then we can resolve the
3578 reloc directly. At this point we have not seen all the input
3579 files, so it is possible that DEF_REGULAR is not set now but
3580 will be set later (it is never cleared). In case of a weak
3581 definition, DEF_REGULAR may be cleared later by a strong
3582 definition in a shared library. We account for that
3583 possibility below by storing information in the relocs_copied
3584 field of the hash table entry. A similar situation occurs
3585 when creating shared libraries and symbol visibility changes
3586 render the symbol local. */
3588 /* No need to do anything if we're not creating a shared object. */
3592 /* We may need to create a reloc section in the dynobj and made room
3596 sreloc = _bfd_elf_make_dynamic_reloc_section
3597 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3603 if (sec->flags & SEC_READONLY)
3604 info->flags |= DF_TEXTREL;
3606 sreloc->size += sizeof (Elf32_External_Rela);
3609 case R_CRIS_8_PCREL:
3610 case R_CRIS_16_PCREL:
3611 case R_CRIS_32_PCREL:
3616 /* Make sure a plt entry is created for this symbol if it
3617 turns out to be a function defined by a dynamic object. */
3618 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3622 /* If we are creating a shared library and this is not a local
3623 symbol, we need to copy the reloc into the shared library.
3624 However when linking with -Bsymbolic and this is a global
3625 symbol which is defined in an object we are including in the
3626 link (i.e., DEF_REGULAR is set), then we can resolve the
3627 reloc directly. At this point we have not seen all the input
3628 files, so it is possible that DEF_REGULAR is not set now but
3629 will be set later (it is never cleared). In case of a weak
3630 definition, DEF_REGULAR may be cleared later by a strong
3631 definition in a shared library. We account for that
3632 possibility below by storing information in the relocs_copied
3633 field of the hash table entry. A similar situation occurs
3634 when creating shared libraries and symbol visibility changes
3635 render the symbol local. */
3637 /* No need to do anything if we're not creating a shared object. */
3641 /* We don't need to handle relocs into sections not going into
3642 the "real" output. */
3643 if ((sec->flags & SEC_ALLOC) == 0)
3646 /* If the symbol is local, then we know already we can
3647 eliminate the reloc. */
3648 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3651 /* If this is with -Bsymbolic and the symbol isn't weak, and
3652 is defined by an ordinary object (the ones we include in
3653 this shared library) then we can also eliminate the
3654 reloc. See comment above for more eliminable cases which
3655 we can't identify at this time. */
3657 && h->root.type != bfd_link_hash_defweak
3661 /* We may need to create a reloc section in the dynobj and made room
3665 sreloc = _bfd_elf_make_dynamic_reloc_section
3666 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3672 sreloc->size += sizeof (Elf32_External_Rela);
3674 /* We count the number of PC relative relocations we have
3675 entered for this symbol, so that we can discard them
3676 again if the symbol is later defined by a regular object.
3677 We know that h is really a pointer to an
3678 elf_cris_link_hash_entry. */
3680 struct elf_cris_link_hash_entry *eh;
3681 struct elf_cris_pcrel_relocs_copied *p;
3683 eh = elf_cris_hash_entry (h);
3685 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3686 if (p->section == sec)
3691 p = ((struct elf_cris_pcrel_relocs_copied *)
3692 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3695 p->next = eh->pcrel_relocs_copied;
3696 eh->pcrel_relocs_copied = p;
3706 /* This relocation describes the C++ object vtable hierarchy.
3707 Reconstruct it for later use during GC. */
3708 case R_CRIS_GNU_VTINHERIT:
3709 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3713 /* This relocation describes which C++ vtable entries are actually
3714 used. Record for later use during GC. */
3715 case R_CRIS_GNU_VTENTRY:
3716 BFD_ASSERT (h != NULL);
3718 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3722 case R_CRIS_16_TPREL:
3723 case R_CRIS_32_TPREL:
3724 /* Already warned above, when necessary. */
3728 /* Other relocs do not appear here. */
3729 bfd_set_error (bfd_error_bad_value);
3737 /* Set the sizes of the dynamic sections. */
3740 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3741 struct bfd_link_info *info)
3743 struct elf_cris_link_hash_table * htab;
3749 htab = elf_cris_hash_table (info);
3753 dynobj = elf_hash_table (info)->dynobj;
3754 BFD_ASSERT (dynobj != NULL);
3756 if (elf_hash_table (info)->dynamic_sections_created)
3758 /* Set the contents of the .interp section to the interpreter. */
3759 if (info->executable)
3761 s = bfd_get_linker_section (dynobj, ".interp");
3762 BFD_ASSERT (s != NULL);
3763 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3764 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3769 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3770 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3773 /* We may have created entries in the .rela.got section.
3774 However, if we are not creating the dynamic sections, we will
3775 not actually use these entries. Reset the size of .rela.got,
3776 which will cause it to get stripped from the output file
3778 s = bfd_get_linker_section (dynobj, ".rela.got");
3783 /* If this is a -Bsymbolic shared link, then we need to discard all PC
3784 relative relocs against symbols defined in a regular object. We
3785 allocated space for them in the check_relocs routine, but we will not
3786 fill them in in the relocate_section routine. We also discard space
3787 for relocs that have become for local symbols due to symbol
3788 visibility changes. For programs, we discard space for relocs for
3789 symbols not referenced by any dynamic object. */
3791 elf_cris_link_hash_traverse (htab,
3792 elf_cris_discard_excess_dso_dynamics,
3795 elf_cris_link_hash_traverse (htab,
3796 elf_cris_discard_excess_program_dynamics,
3799 /* The check_relocs and adjust_dynamic_symbol entry points have
3800 determined the sizes of the various dynamic sections. Allocate
3804 for (s = dynobj->sections; s != NULL; s = s->next)
3808 if ((s->flags & SEC_LINKER_CREATED) == 0)
3811 /* It's OK to base decisions on the section name, because none
3812 of the dynobj section names depend upon the input files. */
3813 name = bfd_get_section_name (dynobj, s);
3815 if (strcmp (name, ".plt") == 0)
3817 /* Remember whether there is a PLT. */
3820 else if (strcmp (name, ".got.plt") == 0)
3822 /* The .got.plt contains the .got header as well as the
3823 actual .got.plt contents. The .got header may contain a
3824 R_CRIS_DTPMOD entry at index 3. */
3825 s->size += htab->dtpmod_refcount != 0
3828 else if (CONST_STRNEQ (name, ".rela"))
3830 if (strcmp (name, ".rela.got") == 0
3831 && htab->dtpmod_refcount != 0
3833 s->size += sizeof (Elf32_External_Rela);
3837 /* Remember whether there are any reloc sections other
3839 if (strcmp (name, ".rela.plt") != 0)
3842 /* We use the reloc_count field as a counter if we need
3843 to copy relocs into the output file. */
3847 else if (! CONST_STRNEQ (name, ".got")
3848 && strcmp (name, ".dynbss") != 0)
3850 /* It's not one of our sections, so don't allocate space. */
3856 /* If we don't need this section, strip it from the
3857 output file. This is mostly to handle .rela.bss and
3858 .rela.plt. We must create both sections in
3859 create_dynamic_sections, because they must be created
3860 before the linker maps input sections to output
3861 sections. The linker does that before
3862 adjust_dynamic_symbol is called, and it is that
3863 function which decides whether anything needs to go
3864 into these sections. */
3865 s->flags |= SEC_EXCLUDE;
3869 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3872 /* Allocate memory for the section contents. We use bfd_zalloc here
3873 in case unused entries are not reclaimed before the section's
3874 contents are written out. This should not happen, but this way
3875 if it does, we will not write out garbage. For reloc sections,
3876 this will make entries have the type R_CRIS_NONE. */
3877 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3878 if (s->contents == NULL)
3882 if (elf_hash_table (info)->dynamic_sections_created)
3884 /* Add some entries to the .dynamic section. We fill in the
3885 values later, in elf_cris_finish_dynamic_sections, but we
3886 must add the entries now so that we get the correct size for
3887 the .dynamic section. The DT_DEBUG entry is filled in by the
3888 dynamic linker and used by the debugger. */
3889 #define add_dynamic_entry(TAG, VAL) \
3890 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3894 if (!add_dynamic_entry (DT_DEBUG, 0))
3900 if (!add_dynamic_entry (DT_PLTGOT, 0)
3901 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3902 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3903 || !add_dynamic_entry (DT_JMPREL, 0))
3909 if (!add_dynamic_entry (DT_RELA, 0)
3910 || !add_dynamic_entry (DT_RELASZ, 0)
3911 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3915 if ((info->flags & DF_TEXTREL) != 0)
3917 if (!add_dynamic_entry (DT_TEXTREL, 0))
3919 info->flags |= DF_TEXTREL;
3922 #undef add_dynamic_entry
3927 /* This function is called via elf_cris_link_hash_traverse if we are
3928 creating a shared object. In the -Bsymbolic case, it discards the
3929 space allocated to copy PC relative relocs against symbols which
3930 are defined in regular objects. For the normal non-symbolic case,
3931 we also discard space for relocs that have become local due to
3932 symbol visibility changes. We allocated space for them in the
3933 check_relocs routine, but we won't fill them in in the
3934 relocate_section routine. */
3937 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3940 struct elf_cris_pcrel_relocs_copied *s;
3941 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3943 /* If a symbol has been forced local or we have found a regular
3944 definition for the symbolic link case, then we won't be needing
3946 if (h->root.def_regular
3947 && (h->root.forced_local
3950 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3953 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3957 sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3962 /* If we have accounted for PC-relative relocs for read-only
3963 sections, now is the time to warn for them. We can't do it in
3964 cris_elf_check_relocs, because we don't know the status of all
3965 symbols at that time (and it's common to force symbols local
3968 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3969 if ((s->section->flags & SEC_READONLY) != 0)
3971 /* FIXME: How do we make this optionally a warning only? */
3972 (*_bfd_error_handler)
3973 (_("%B, section `%A', to symbol `%s':\n"
3974 " relocation %s should not be used"
3975 " in a shared object; recompile with -fPIC"),
3978 h->root.root.root.string,
3979 cris_elf_howto_table[s->r_type].name);
3981 info->flags |= DF_TEXTREL;
3987 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3988 creating a shared object. We discard space for relocs for symbols put
3989 in the .got, but which we found we do not have to resolve at run-time. */
3992 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
3995 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3997 /* If we're not creating a shared library and have a symbol which is
3998 referred to by .got references, but the symbol is defined locally,
3999 (or rather, not defined by a DSO) then lose the reloc for the .got
4000 (don't allocate room for it). Likewise for relocs for something
4001 for which we create a PLT. */
4002 if (!h->root.def_dynamic
4003 || h->root.plt.refcount > 0)
4005 if (h->reg_got_refcount > 0
4006 /* The size of this section is only valid and in sync with the
4007 various reference counts if we do dynamic; don't decrement it
4009 && elf_hash_table (info)->dynamic_sections_created)
4011 bfd *dynobj = elf_hash_table (info)->dynobj;
4014 BFD_ASSERT (dynobj != NULL);
4016 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
4018 BFD_ASSERT (srelgot != NULL);
4020 srelgot->size -= sizeof (Elf32_External_Rela);
4023 /* If the locally-defined symbol isn't used by a DSO, then we don't
4024 have to export it as a dynamic symbol. This was already done for
4025 functions; doing this for all symbols would presumably not
4026 introduce new problems. Of course we don't do this if we're
4027 exporting all dynamic symbols. */
4028 if (! info->export_dynamic
4029 && h->root.dynindx != -1
4030 && !h->root.def_dynamic
4031 && !h->root.ref_dynamic)
4033 h->root.dynindx = -1;
4034 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4035 h->root.dynstr_index);
4042 /* Reject a file depending on presence and expectation of prefixed
4043 underscores on symbols. */
4046 cris_elf_object_p (bfd *abfd)
4048 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4051 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4052 return (bfd_get_symbol_leading_char (abfd) == '_');
4054 return (bfd_get_symbol_leading_char (abfd) == 0);
4057 /* Mark presence or absence of leading underscore. Set machine type
4058 flags from mach type. */
4061 cris_elf_final_write_processing (bfd *abfd,
4062 bfd_boolean linker ATTRIBUTE_UNUSED)
4064 unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4066 e_flags &= ~EF_CRIS_UNDERSCORE;
4067 if (bfd_get_symbol_leading_char (abfd) == '_')
4068 e_flags |= EF_CRIS_UNDERSCORE;
4070 switch (bfd_get_mach (abfd))
4072 case bfd_mach_cris_v0_v10:
4073 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4076 case bfd_mach_cris_v10_v32:
4077 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4080 case bfd_mach_cris_v32:
4081 e_flags |= EF_CRIS_VARIANT_V32;
4085 _bfd_abort (__FILE__, __LINE__,
4086 _("Unexpected machine number"));
4089 elf_elfheader (abfd)->e_flags = e_flags;
4092 /* Set the mach type from e_flags value. */
4095 cris_elf_set_mach_from_flags (bfd *abfd,
4096 unsigned long flags)
4098 switch (flags & EF_CRIS_VARIANT_MASK)
4100 case EF_CRIS_VARIANT_ANY_V0_V10:
4101 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4104 case EF_CRIS_VARIANT_V32:
4105 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4108 case EF_CRIS_VARIANT_COMMON_V10_V32:
4109 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4113 /* Since we don't recognize them, we obviously can't support them
4114 with this code; we'd have to require that all future handling
4115 would be optional. */
4116 bfd_set_error (bfd_error_wrong_format);
4123 /* Display the flags field. */
4126 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
4128 FILE *file = (FILE *) ptr;
4130 BFD_ASSERT (abfd != NULL && ptr != NULL);
4132 _bfd_elf_print_private_bfd_data (abfd, ptr);
4134 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4136 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4137 fprintf (file, _(" [symbols have a _ prefix]"));
4138 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4139 == EF_CRIS_VARIANT_COMMON_V10_V32)
4140 fprintf (file, _(" [v10 and v32]"));
4141 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4142 == EF_CRIS_VARIANT_V32)
4143 fprintf (file, _(" [v32]"));
4149 /* Don't mix files with and without a leading underscore. */
4152 cris_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4156 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4159 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4160 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4163 imach = bfd_get_mach (ibfd);
4165 if (! elf_flags_init (obfd))
4167 /* This happens when ld starts out with a 'blank' output file. */
4168 elf_flags_init (obfd) = TRUE;
4170 /* We ignore the linker-set mach, and instead set it according to
4171 the first input file. This would also happen if we could
4172 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4173 This allows us to keep the same linker config across
4174 cris(v0..v10) and crisv32. The drawback is that we can't force
4175 the output type, which might be a sane thing to do for a
4176 v10+v32 compatibility object. */
4177 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4181 if (bfd_get_symbol_leading_char (ibfd)
4182 != bfd_get_symbol_leading_char (obfd))
4184 (*_bfd_error_handler)
4185 (bfd_get_symbol_leading_char (ibfd) == '_'
4186 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4187 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4189 bfd_set_error (bfd_error_bad_value);
4193 omach = bfd_get_mach (obfd);
4197 /* We can get an incompatible combination only if either is
4198 bfd_mach_cris_v32, and the other one isn't compatible. */
4199 if ((imach == bfd_mach_cris_v32
4200 && omach != bfd_mach_cris_v10_v32)
4201 || (omach == bfd_mach_cris_v32
4202 && imach != bfd_mach_cris_v10_v32))
4204 (*_bfd_error_handler)
4205 ((imach == bfd_mach_cris_v32)
4206 ? _("%B contains CRIS v32 code, incompatible"
4207 " with previous objects")
4208 : _("%B contains non-CRIS-v32 code, incompatible"
4209 " with previous objects"),
4211 bfd_set_error (bfd_error_bad_value);
4215 /* We don't have to check the case where the input is compatible
4216 with v10 and v32, because the output is already known to be set
4217 to the other (compatible) mach. */
4218 if (omach == bfd_mach_cris_v10_v32
4219 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4226 /* Do side-effects of e_flags copying to obfd. */
4229 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4231 /* Call the base function. */
4232 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4235 /* If output is big-endian for some obscure reason, stop here. */
4236 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4239 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4240 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4243 /* Do what we really came here for. */
4244 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4247 static enum elf_reloc_type_class
4248 elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4249 const asection *rel_sec ATTRIBUTE_UNUSED,
4250 const Elf_Internal_Rela *rela)
4252 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4255 case R_CRIS_RELATIVE:
4256 return reloc_class_relative;
4257 case R_CRIS_JUMP_SLOT:
4258 return reloc_class_plt;
4260 return reloc_class_copy;
4262 return reloc_class_normal;
4266 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4267 two GOT entries from three types with two different sizes. We handle
4268 it as a single entry, so we can use the regular offset-calculation
4272 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4273 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4274 struct elf_link_hash_entry *hr,
4276 unsigned long symndx)
4278 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4281 /* We may have one regular GOT entry or up to two TLS GOT
4285 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4286 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4288 BFD_ASSERT (local_got_refcounts != NULL);
4290 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4292 /* We can't have a variable referred to both as a regular
4293 variable and through TLS relocs. */
4294 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4295 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4299 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4302 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4307 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4308 if (hh->reg_got_refcount > 0)
4310 /* The actual error-on-input is emitted elsewhere. */
4311 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4315 if (hh->dtp_refcount > 0)
4318 if (hh->tprel_refcount > 0)
4322 /* We're only called when h->got.refcount is non-zero, so we must
4323 have a non-zero size. */
4324 BFD_ASSERT (eltsiz != 0);
4328 #define ELF_ARCH bfd_arch_cris
4329 #define ELF_TARGET_ID CRIS_ELF_DATA
4330 #define ELF_MACHINE_CODE EM_CRIS
4331 #define ELF_MAXPAGESIZE 0x2000
4333 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
4334 #define TARGET_LITTLE_NAME "elf32-cris"
4335 #define elf_symbol_leading_char 0
4337 #define elf_info_to_howto_rel NULL
4338 #define elf_info_to_howto cris_info_to_howto_rela
4339 #define elf_backend_relocate_section cris_elf_relocate_section
4340 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4341 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
4342 #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4343 #define elf_backend_check_relocs cris_elf_check_relocs
4344 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4345 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4347 #define elf_backend_can_gc_sections 1
4348 #define elf_backend_can_refcount 1
4350 #define elf_backend_object_p cris_elf_object_p
4351 #define elf_backend_final_write_processing \
4352 cris_elf_final_write_processing
4353 #define bfd_elf32_bfd_print_private_bfd_data \
4354 cris_elf_print_private_bfd_data
4355 #define bfd_elf32_bfd_merge_private_bfd_data \
4356 cris_elf_merge_private_bfd_data
4357 #define bfd_elf32_bfd_copy_private_bfd_data \
4358 cris_elf_copy_private_bfd_data
4360 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4361 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4363 #define bfd_elf32_bfd_link_hash_table_create \
4364 elf_cris_link_hash_table_create
4365 #define elf_backend_adjust_dynamic_symbol \
4366 elf_cris_adjust_dynamic_symbol
4367 #define elf_backend_copy_indirect_symbol \
4368 elf_cris_copy_indirect_symbol
4369 #define elf_backend_size_dynamic_sections \
4370 elf_cris_size_dynamic_sections
4371 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4372 #define elf_backend_finish_dynamic_symbol \
4373 elf_cris_finish_dynamic_symbol
4374 #define elf_backend_finish_dynamic_sections \
4375 elf_cris_finish_dynamic_sections
4376 #define elf_backend_create_dynamic_sections \
4377 _bfd_elf_create_dynamic_sections
4378 #define bfd_elf32_bfd_final_link \
4379 bfd_elf_gc_common_final_link
4380 #define elf_backend_hide_symbol elf_cris_hide_symbol
4381 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4383 #define elf_backend_want_got_plt 1
4384 #define elf_backend_plt_readonly 1
4385 #define elf_backend_want_plt_sym 0
4386 #define elf_backend_got_header_size 12
4387 #define elf_backend_got_elt_size elf_cris_got_elt_size
4389 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4390 linking and libraries (if it's a win of any significance). Until then,
4391 take the easy route. */
4392 #define elf_backend_may_use_rel_p 0
4393 #define elf_backend_may_use_rela_p 1
4394 #define elf_backend_rela_normal 1
4396 #include "elf32-target.h"
4398 #undef TARGET_LITTLE_SYM
4399 #undef TARGET_LITTLE_NAME
4400 #undef elf_symbol_leading_char
4402 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
4403 #define TARGET_LITTLE_NAME "elf32-us-cris"
4404 #define elf_symbol_leading_char '_'
4406 #define elf32_bed elf32_us_cris_bed
4408 #include "elf32-target.h"