1 /* CRIS-specific support for 32-bit ELF.
2 Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed by Axis Communications AB.
4 Written by Hans-Peter Nilsson, based on elf32-fr30.c
5 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 /* Forward declarations. */
30 static reloc_howto_type
* cris_reloc_type_lookup
31 PARAMS ((bfd
*abfd
, bfd_reloc_code_real_type code
));
33 static void cris_info_to_howto_rela
34 PARAMS ((bfd
*, arelent
*, Elf32_Internal_Rela
*));
36 static boolean cris_elf_grok_prstatus
37 PARAMS ((bfd
*abfd
, Elf_Internal_Note
*note
));
39 static boolean cris_elf_grok_psinfo
40 PARAMS ((bfd
*abfd
, Elf_Internal_Note
*note
));
42 static boolean cris_elf_relocate_section
43 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
44 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**));
46 static bfd_reloc_status_type cris_final_link_relocate
47 PARAMS ((reloc_howto_type
*, bfd
*, asection
*, bfd_byte
*,
48 Elf_Internal_Rela
*, bfd_vma
));
50 static boolean cris_elf_gc_sweep_hook
51 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
52 const Elf_Internal_Rela
*));
54 static asection
* cris_elf_gc_mark_hook
55 PARAMS ((asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
56 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
58 static boolean cris_elf_object_p
PARAMS ((bfd
*));
60 static void cris_elf_final_write_processing
PARAMS ((bfd
*, boolean
));
62 static boolean cris_elf_print_private_bfd_data
PARAMS ((bfd
*, PTR
));
64 static boolean cris_elf_merge_private_bfd_data
PARAMS ((bfd
*, bfd
*));
66 struct elf_cris_link_hash_entry
;
67 static boolean elf_cris_discard_excess_dso_dynamics
68 PARAMS ((struct elf_cris_link_hash_entry
*, PTR
));
69 static boolean elf_cris_discard_excess_program_dynamics
70 PARAMS ((struct elf_cris_link_hash_entry
*, PTR
));
71 static boolean elf_cris_adjust_gotplt_to_got
72 PARAMS ((struct elf_cris_link_hash_entry
*, PTR
));
73 static boolean elf_cris_try_fold_plt_to_got
74 PARAMS ((struct elf_cris_link_hash_entry
*, PTR
));
75 static struct bfd_hash_entry
*elf_cris_link_hash_newfunc
76 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
77 static struct bfd_link_hash_table
*elf_cris_link_hash_table_create
79 static boolean elf_cris_adjust_dynamic_symbol
80 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
81 static boolean cris_elf_check_relocs
82 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
83 const Elf_Internal_Rela
*));
85 static boolean elf_cris_size_dynamic_sections
86 PARAMS ((bfd
*, struct bfd_link_info
*));
87 static boolean elf_cris_finish_dynamic_symbol
88 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*,
90 static boolean elf_cris_finish_dynamic_sections
91 PARAMS ((bfd
*, struct bfd_link_info
*));
92 static void elf_cris_hide_symbol
93 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*, boolean
));
94 static enum elf_reloc_type_class elf_cris_reloc_type_class
95 PARAMS ((const Elf_Internal_Rela
*));
97 static reloc_howto_type cris_elf_howto_table
[] =
99 /* This reloc does nothing. */
100 HOWTO (R_CRIS_NONE
, /* type */
102 2, /* size (0 = byte, 1 = short, 2 = long) */
104 false, /* pc_relative */
106 complain_overflow_bitfield
, /* complain_on_overflow */
107 bfd_elf_generic_reloc
, /* special_function */
108 "R_CRIS_NONE", /* name */
109 false, /* partial_inplace */
112 false), /* pcrel_offset */
114 /* An 8 bit absolute relocation. */
115 HOWTO (R_CRIS_8
, /* type */
117 0, /* size (0 = byte, 1 = short, 2 = long) */
119 false, /* pc_relative */
121 complain_overflow_bitfield
, /* complain_on_overflow */
122 bfd_elf_generic_reloc
, /* special_function */
123 "R_CRIS_8", /* name */
124 false, /* partial_inplace */
125 0x0000, /* src_mask */
126 0x00ff, /* dst_mask */
127 false), /* pcrel_offset */
129 /* A 16 bit absolute relocation. */
130 HOWTO (R_CRIS_16
, /* type */
132 1, /* size (0 = byte, 1 = short, 2 = long) */
134 false, /* pc_relative */
136 complain_overflow_bitfield
, /* complain_on_overflow */
137 bfd_elf_generic_reloc
, /* special_function */
138 "R_CRIS_16", /* name */
139 false, /* partial_inplace */
140 0x00000000, /* src_mask */
141 0x0000ffff, /* dst_mask */
142 false), /* pcrel_offset */
144 /* A 32 bit absolute relocation. */
145 HOWTO (R_CRIS_32
, /* type */
147 2, /* size (0 = byte, 1 = short, 2 = long) */
149 false, /* pc_relative */
151 complain_overflow_bitfield
, /* complain_on_overflow */
152 bfd_elf_generic_reloc
, /* special_function */
153 "R_CRIS_32", /* name */
154 false, /* partial_inplace */
155 0x00000000, /* src_mask */
156 0xffffffff, /* dst_mask */
157 false), /* pcrel_offset */
159 /* An 8 bit PC-relative relocation. */
160 HOWTO (R_CRIS_8_PCREL
, /* type */
162 0, /* size (0 = byte, 1 = short, 2 = long) */
164 true, /* pc_relative */
166 complain_overflow_bitfield
, /* complain_on_overflow */
167 bfd_elf_generic_reloc
, /* special_function */
168 "R_CRIS_8_PCREL", /* name */
169 false, /* partial_inplace */
170 0x0000, /* src_mask */
171 0x00ff, /* dst_mask */
172 true), /* pcrel_offset */
174 /* A 16 bit PC-relative relocation. */
175 HOWTO (R_CRIS_16_PCREL
, /* type */
177 1, /* size (0 = byte, 1 = short, 2 = long) */
179 true, /* pc_relative */
181 complain_overflow_bitfield
, /* complain_on_overflow */
182 bfd_elf_generic_reloc
, /* special_function */
183 "R_CRIS_16_PCREL", /* name */
184 false, /* partial_inplace */
185 0x00000000, /* src_mask */
186 0x0000ffff, /* dst_mask */
187 true), /* pcrel_offset */
189 /* A 32 bit PC-relative relocation. */
190 HOWTO (R_CRIS_32_PCREL
, /* type */
192 2, /* size (0 = byte, 1 = short, 2 = long) */
194 true, /* pc_relative */
196 complain_overflow_bitfield
, /* complain_on_overflow */
197 bfd_elf_generic_reloc
, /* special_function */
198 "R_CRIS_32_PCREL", /* name */
199 false, /* partial_inplace */
200 0x00000000, /* src_mask */
201 0xffffffff, /* dst_mask */
202 true), /* pcrel_offset */
204 /* GNU extension to record C++ vtable hierarchy. */
205 HOWTO (R_CRIS_GNU_VTINHERIT
, /* type */
207 2, /* size (0 = byte, 1 = short, 2 = long) */
209 false, /* pc_relative */
211 complain_overflow_dont
, /* complain_on_overflow */
212 NULL
, /* special_function */
213 "R_CRIS_GNU_VTINHERIT", /* name */
214 false, /* partial_inplace */
217 false), /* pcrel_offset */
219 /* GNU extension to record C++ vtable member usage. */
220 HOWTO (R_CRIS_GNU_VTENTRY
, /* type */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
224 false, /* pc_relative */
226 complain_overflow_dont
, /* complain_on_overflow */
227 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
228 "R_CRIS_GNU_VTENTRY", /* name */
229 false, /* partial_inplace */
232 false), /* pcrel_offset */
234 /* This is used only by the dynamic linker. The symbol should exist
235 both in the object being run and in some shared library. The
236 dynamic linker copies the data addressed by the symbol from the
237 shared library into the object, because the object being
238 run has to have the data at some particular address. */
239 HOWTO (R_CRIS_COPY
, /* type */
241 2, /* size (0 = byte, 1 = short, 2 = long) */
243 false, /* pc_relative */
245 complain_overflow_bitfield
, /* complain_on_overflow */
246 bfd_elf_generic_reloc
, /* special_function */
247 "R_CRIS_COPY", /* name */
248 false, /* partial_inplace */
251 false), /* pcrel_offset */
253 /* Like R_CRIS_32, but used when setting global offset table entries. */
254 HOWTO (R_CRIS_GLOB_DAT
, /* type */
256 2, /* size (0 = byte, 1 = short, 2 = long) */
258 false, /* pc_relative */
260 complain_overflow_bitfield
, /* complain_on_overflow */
261 bfd_elf_generic_reloc
, /* special_function */
262 "R_CRIS_GLOB_DAT", /* name */
263 false, /* partial_inplace */
265 0xffffffff, /* dst_mask */
266 false), /* pcrel_offset */
268 /* Marks a procedure linkage table entry for a symbol. */
269 HOWTO (R_CRIS_JUMP_SLOT
, /* type */
271 2, /* size (0 = byte, 1 = short, 2 = long) */
273 false, /* pc_relative */
275 complain_overflow_bitfield
, /* complain_on_overflow */
276 bfd_elf_generic_reloc
, /* special_function */
277 "R_CRIS_JUMP_SLOT", /* name */
278 false, /* partial_inplace */
281 false), /* pcrel_offset */
283 /* Used only by the dynamic linker. When the object is run, this
284 longword is set to the load address of the object, plus the
286 HOWTO (R_CRIS_RELATIVE
, /* type */
288 2, /* size (0 = byte, 1 = short, 2 = long) */
290 false, /* pc_relative */
292 complain_overflow_bitfield
, /* complain_on_overflow */
293 bfd_elf_generic_reloc
, /* special_function */
294 "R_CRIS_RELATIVE", /* name */
295 false, /* partial_inplace */
297 0xffffffff, /* dst_mask */
298 false), /* pcrel_offset */
300 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
301 HOWTO (R_CRIS_16_GOT
, /* type */
303 1, /* size (0 = byte, 1 = short, 2 = long) */
305 false, /* pc_relative */
307 complain_overflow_bitfield
, /* complain_on_overflow */
308 bfd_elf_generic_reloc
, /* special_function */
309 "R_CRIS_16_GOT", /* name */
310 false, /* partial_inplace */
312 0xffff, /* dst_mask */
313 false), /* pcrel_offset */
315 HOWTO (R_CRIS_32_GOT
, /* type */
317 2, /* size (0 = byte, 1 = short, 2 = long) */
319 false, /* pc_relative */
321 complain_overflow_bitfield
, /* complain_on_overflow */
322 bfd_elf_generic_reloc
, /* special_function */
323 "R_CRIS_32_GOT", /* name */
324 false, /* partial_inplace */
326 0xffffffff, /* dst_mask */
327 false), /* pcrel_offset */
329 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
330 the GOT table for the symbol. */
331 HOWTO (R_CRIS_16_GOTPLT
, /* type */
333 1, /* size (0 = byte, 1 = short, 2 = long) */
335 false, /* pc_relative */
337 complain_overflow_bitfield
, /* complain_on_overflow */
338 bfd_elf_generic_reloc
, /* special_function */
339 "R_CRIS_16_GOTPLT", /* name */
340 false, /* partial_inplace */
342 0xffff, /* dst_mask */
343 false), /* pcrel_offset */
345 HOWTO (R_CRIS_32_GOTPLT
, /* type */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
349 false, /* pc_relative */
351 complain_overflow_bitfield
, /* complain_on_overflow */
352 bfd_elf_generic_reloc
, /* special_function */
353 "R_CRIS_32_GOTPLT", /* name */
354 false, /* partial_inplace */
356 0xffffffff, /* dst_mask */
357 false), /* pcrel_offset */
359 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
361 HOWTO (R_CRIS_32_GOTREL
, /* type */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
365 false, /* pc_relative */
367 complain_overflow_bitfield
, /* complain_on_overflow */
368 bfd_elf_generic_reloc
, /* special_function */
369 "R_CRIS_32_GOTREL", /* name */
370 false, /* partial_inplace */
372 0xffffffff, /* dst_mask */
373 false), /* pcrel_offset */
375 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
376 to create PLT entry for symbol. */
377 HOWTO (R_CRIS_32_PLT_GOTREL
, /* type */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
381 false, /* pc_relative */
383 complain_overflow_bitfield
, /* complain_on_overflow */
384 bfd_elf_generic_reloc
, /* special_function */
385 "R_CRIS_32_PLT_GOTREL", /* name */
386 false, /* partial_inplace */
388 0xffffffff, /* dst_mask */
389 false), /* pcrel_offset */
391 /* A 32-bit offset from PC (location after the relocation) + addend to
392 entry for this symbol in PLT and request to create PLT entry for
394 HOWTO (R_CRIS_32_PLT_PCREL
, /* type */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
398 true, /* pc_relative */
400 complain_overflow_bitfield
, /* complain_on_overflow */
401 bfd_elf_generic_reloc
, /* special_function */
402 "R_CRIS_32_PLT_PCREL", /* name */
403 false, /* partial_inplace */
405 0xffffffff, /* dst_mask */
406 true) /* pcrel_offset */
409 /* Map BFD reloc types to CRIS ELF reloc types. */
411 struct cris_reloc_map
413 bfd_reloc_code_real_type bfd_reloc_val
;
414 unsigned int cris_reloc_val
;
417 static const struct cris_reloc_map cris_reloc_map
[] =
419 { BFD_RELOC_NONE
, R_CRIS_NONE
},
420 { BFD_RELOC_8
, R_CRIS_8
},
421 { BFD_RELOC_16
, R_CRIS_16
},
422 { BFD_RELOC_32
, R_CRIS_32
},
423 { BFD_RELOC_8_PCREL
, R_CRIS_8_PCREL
},
424 { BFD_RELOC_16_PCREL
, R_CRIS_16_PCREL
},
425 { BFD_RELOC_32_PCREL
, R_CRIS_32_PCREL
},
426 { BFD_RELOC_VTABLE_INHERIT
, R_CRIS_GNU_VTINHERIT
},
427 { BFD_RELOC_VTABLE_ENTRY
, R_CRIS_GNU_VTENTRY
},
428 { BFD_RELOC_CRIS_COPY
, R_CRIS_COPY
},
429 { BFD_RELOC_CRIS_GLOB_DAT
, R_CRIS_GLOB_DAT
},
430 { BFD_RELOC_CRIS_JUMP_SLOT
, R_CRIS_JUMP_SLOT
},
431 { BFD_RELOC_CRIS_RELATIVE
, R_CRIS_RELATIVE
},
432 { BFD_RELOC_CRIS_16_GOT
, R_CRIS_16_GOT
},
433 { BFD_RELOC_CRIS_32_GOT
, R_CRIS_32_GOT
},
434 { BFD_RELOC_CRIS_16_GOTPLT
, R_CRIS_16_GOTPLT
},
435 { BFD_RELOC_CRIS_32_GOTPLT
, R_CRIS_32_GOTPLT
},
436 { BFD_RELOC_CRIS_32_GOTREL
, R_CRIS_32_GOTREL
},
437 { BFD_RELOC_CRIS_32_PLT_GOTREL
, R_CRIS_32_PLT_GOTREL
},
438 { BFD_RELOC_CRIS_32_PLT_PCREL
, R_CRIS_32_PLT_PCREL
}
441 static reloc_howto_type
*
442 cris_reloc_type_lookup (abfd
, code
)
443 bfd
* abfd ATTRIBUTE_UNUSED
;
444 bfd_reloc_code_real_type code
;
448 for (i
= 0; i
< sizeof (cris_reloc_map
) / sizeof (cris_reloc_map
[0]); i
++)
449 if (cris_reloc_map
[i
].bfd_reloc_val
== code
)
450 return & cris_elf_howto_table
[cris_reloc_map
[i
].cris_reloc_val
];
455 /* Set the howto pointer for an CRIS ELF reloc. */
458 cris_info_to_howto_rela (abfd
, cache_ptr
, dst
)
459 bfd
* abfd ATTRIBUTE_UNUSED
;
461 Elf32_Internal_Rela
* dst
;
465 r_type
= ELF32_R_TYPE (dst
->r_info
);
466 BFD_ASSERT (r_type
< (unsigned int) R_CRIS_max
);
467 cache_ptr
->howto
= & cris_elf_howto_table
[r_type
];
470 /* Support for core dump NOTE sections. */
473 cris_elf_grok_prstatus (abfd
, note
)
475 Elf_Internal_Note
*note
;
480 switch (note
->descsz
)
485 case 214: /* Linux/CRIS */
487 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
490 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 22);
499 /* Make a ".reg/999" section. */
500 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
501 raw_size
, note
->descpos
+ offset
);
505 cris_elf_grok_psinfo (abfd
, note
)
507 Elf_Internal_Note
*note
;
509 switch (note
->descsz
)
514 case 124: /* Linux/CRIS elf_prpsinfo */
515 elf_tdata (abfd
)->core_program
516 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
517 elf_tdata (abfd
)->core_command
518 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
521 /* Note that for some reason, a spurious space is tacked
522 onto the end of the args in some (at least one anyway)
523 implementations, so strip it off if it exists. */
526 char *command
= elf_tdata (abfd
)->core_command
;
527 int n
= strlen (command
);
529 if (0 < n
&& command
[n
- 1] == ' ')
530 command
[n
- 1] = '\0';
536 /* The name of the dynamic interpreter. This is put in the .interp
539 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
541 /* The size in bytes of an entry in the procedure linkage table. */
543 #define PLT_ENTRY_SIZE 20
545 /* The first entry in an absolute procedure linkage table looks like this. */
547 static const bfd_byte elf_cris_plt0_entry
[PLT_ENTRY_SIZE
] =
550 0x7e, 0x7e, /* push mof. */
551 0x7f, 0x0d, /* (dip [pc+]) */
552 0, 0, 0, 0, /* Replaced with address of .got + 4. */
553 0x30, 0x7a, /* move [...],mof */
554 0x7f, 0x0d, /* (dip [pc+]) */
555 0, 0, 0, 0, /* Replaced with address of .got + 8. */
556 0x30, 0x09, /* jump [...] */
559 /* Subsequent entries in an absolute procedure linkage table look like
562 static const bfd_byte elf_cris_plt_entry
[PLT_ENTRY_SIZE
] =
564 0x7f, 0x0d, /* (dip [pc+]) */
565 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
566 0x30, 0x09, /* jump [...] */
567 0x3f, 0x7e, /* move [pc+],mof */
568 0, 0, 0, 0, /* Replaced with offset into relocation table. */
569 0x2f, 0xfe, /* add.d [pc+],pc */
571 0xff, 0xff /* Replaced with offset to start of .plt. */
574 /* The first entry in a PIC procedure linkage table looks like this. */
576 static const bfd_byte elf_cris_pic_plt0_entry
[PLT_ENTRY_SIZE
] =
578 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
579 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
580 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
581 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
584 /* Subsequent entries in a PIC procedure linkage table look like this. */
586 static const bfd_byte elf_cris_pic_plt_entry
[PLT_ENTRY_SIZE
] =
588 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
589 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
590 0x30, 0x09, /* jump [...] */
591 0x3f, 0x7e, /* move [pc+],mof */
592 0, 0, 0, 0, /* Replaced with offset into relocation table. */
593 0x2f, 0xfe, /* add.d [pc+],pc */
594 0xec, 0xff, /* Replaced with offset to start of .plt. */
598 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
599 (and most other PIC/shlib stuff). Check that we don't drift away
602 The CRIS linker, like the m68k and i386 linkers (and probably the rest
603 too) needs to keep track of the number of relocs that it decides to
604 copy in check_relocs for each symbol. This is so that it can discard
605 PC relative relocs if it doesn't need them when linking with
606 -Bsymbolic. We store the information in a field extending the regular
607 ELF linker hash table. */
609 /* This structure keeps track of the number of PC relative relocs we have
610 copied for a given symbol. */
612 struct elf_cris_pcrel_relocs_copied
615 struct elf_cris_pcrel_relocs_copied
*next
;
616 /* A section in dynobj. */
618 /* Number of relocs copied in this section. */
622 /* CRIS ELF linker hash entry. */
624 struct elf_cris_link_hash_entry
626 struct elf_link_hash_entry root
;
628 /* Number of PC relative relocs copied for this symbol. */
629 struct elf_cris_pcrel_relocs_copied
*pcrel_relocs_copied
;
631 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
632 both a general GOT and a PLT-specific GOT entry for the same symbol,
633 when it is referenced both as a function and as a function pointer.
635 Number of GOTPLT references for a function. */
636 bfd_signed_vma gotplt_refcount
;
638 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
639 (zero is never used as an index). FIXME: We should be able to fold
640 this with gotplt_refcount in a union, like the got and plt unions in
641 elf_link_hash_entry. */
642 bfd_size_type gotplt_offset
;
645 /* CRIS ELF linker hash table. */
647 struct elf_cris_link_hash_table
649 struct elf_link_hash_table root
;
651 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
652 since we try and avoid creating GOTPLT:s when there's already a GOT.
653 Instead, we keep and update the next available index here. */
654 bfd_size_type next_gotplt_entry
;
657 /* Traverse a CRIS ELF linker hash table. */
659 #define elf_cris_link_hash_traverse(table, func, info) \
660 (elf_link_hash_traverse \
662 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
665 /* Get the CRIS ELF linker hash table from a link_info structure. */
667 #define elf_cris_hash_table(p) \
668 ((struct elf_cris_link_hash_table *) (p)->hash)
670 /* Create an entry in a CRIS ELF linker hash table. */
672 static struct bfd_hash_entry
*
673 elf_cris_link_hash_newfunc (entry
, table
, string
)
674 struct bfd_hash_entry
*entry
;
675 struct bfd_hash_table
*table
;
678 struct elf_cris_link_hash_entry
*ret
=
679 (struct elf_cris_link_hash_entry
*) entry
;
681 /* Allocate the structure if it has not already been allocated by a
683 if (ret
== (struct elf_cris_link_hash_entry
*) NULL
)
684 ret
= ((struct elf_cris_link_hash_entry
*)
685 bfd_hash_allocate (table
,
686 sizeof (struct elf_cris_link_hash_entry
)));
687 if (ret
== (struct elf_cris_link_hash_entry
*) NULL
)
688 return (struct bfd_hash_entry
*) ret
;
690 /* Call the allocation method of the superclass. */
691 ret
= ((struct elf_cris_link_hash_entry
*)
692 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
694 if (ret
!= (struct elf_cris_link_hash_entry
*) NULL
)
696 ret
->pcrel_relocs_copied
= NULL
;
697 ret
->gotplt_refcount
= 0;
698 ret
->gotplt_offset
= 0;
701 return (struct bfd_hash_entry
*) ret
;
704 /* Create a CRIS ELF linker hash table. */
706 static struct bfd_link_hash_table
*
707 elf_cris_link_hash_table_create (abfd
)
710 struct elf_cris_link_hash_table
*ret
;
711 bfd_size_type amt
= sizeof (struct elf_cris_link_hash_table
);
713 ret
= ((struct elf_cris_link_hash_table
*) bfd_malloc (amt
));
714 if (ret
== (struct elf_cris_link_hash_table
*) NULL
)
717 if (! _bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
718 elf_cris_link_hash_newfunc
))
724 /* Initialize to skip over the first three entries in the gotplt; they
725 are used for run-time symbol evaluation. */
726 ret
->next_gotplt_entry
= 12;
728 return &ret
->root
.root
;
731 /* Perform a single relocation. By default we use the standard BFD
732 routines, with a few tweaks. */
734 static bfd_reloc_status_type
735 cris_final_link_relocate (howto
, input_bfd
, input_section
, contents
, rel
,
737 reloc_howto_type
* howto
;
739 asection
* input_section
;
741 Elf_Internal_Rela
* rel
;
744 bfd_reloc_status_type r
;
746 /* PC-relative relocations are relative to the position *after*
747 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
748 not a single byte, since PC must be 16-bit-aligned. */
749 switch (ELF32_R_TYPE (rel
->r_info
))
751 /* Check that the 16-bit GOT relocs are positive. */
752 case R_CRIS_16_GOTPLT
:
754 if ((bfd_signed_vma
) relocation
< 0)
755 return bfd_reloc_overflow
;
758 case R_CRIS_32_PLT_PCREL
:
759 case R_CRIS_32_PCREL
:
763 case R_CRIS_16_PCREL
:
771 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
772 contents
, rel
->r_offset
,
773 relocation
, rel
->r_addend
);
777 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
778 copied, for further comments. */
781 cris_elf_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
782 contents
, relocs
, local_syms
, local_sections
)
783 bfd
* output_bfd ATTRIBUTE_UNUSED
;
784 struct bfd_link_info
* info
;
786 asection
* input_section
;
788 Elf_Internal_Rela
* relocs
;
789 Elf_Internal_Sym
* local_syms
;
790 asection
** local_sections
;
793 Elf_Internal_Shdr
* symtab_hdr
;
794 struct elf_link_hash_entry
** sym_hashes
;
795 bfd_vma
*local_got_offsets
;
799 Elf_Internal_Rela
* rel
;
800 Elf_Internal_Rela
* relend
;
802 if (info
->relocateable
)
805 dynobj
= elf_hash_table (info
)->dynobj
;
806 local_got_offsets
= elf_local_got_offsets (input_bfd
);
807 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
808 sym_hashes
= elf_sym_hashes (input_bfd
);
809 relend
= relocs
+ input_section
->reloc_count
;
817 splt
= bfd_get_section_by_name (dynobj
, ".plt");
818 sgot
= bfd_get_section_by_name (dynobj
, ".got");
821 for (rel
= relocs
; rel
< relend
; rel
++)
823 reloc_howto_type
* howto
;
824 unsigned long r_symndx
;
825 Elf_Internal_Sym
* sym
;
827 struct elf_link_hash_entry
* h
;
829 bfd_reloc_status_type r
;
830 const char * symname
= NULL
;
833 r_type
= ELF32_R_TYPE (rel
->r_info
);
835 if ( r_type
== R_CRIS_GNU_VTINHERIT
836 || r_type
== R_CRIS_GNU_VTENTRY
)
839 /* This is a final link. */
840 r_symndx
= ELF32_R_SYM (rel
->r_info
);
841 howto
= cris_elf_howto_table
+ r_type
;
846 if (r_symndx
< symtab_hdr
->sh_info
)
848 sym
= local_syms
+ r_symndx
;
849 sec
= local_sections
[r_symndx
];
850 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, sec
, rel
);
852 symname
= (bfd_elf_string_from_elf_section
853 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
855 symname
= bfd_section_name (input_bfd
, sec
);
859 /* It seems this can happen with erroneous or unsupported input
860 (mixing a.out and elf in an archive, for example.) */
861 if (sym_hashes
== NULL
)
864 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
866 while (h
->root
.type
== bfd_link_hash_indirect
867 || h
->root
.type
== bfd_link_hash_warning
)
868 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
870 symname
= h
->root
.root
.string
;
872 if (h
->root
.type
== bfd_link_hash_defined
873 || h
->root
.type
== bfd_link_hash_defweak
)
875 sec
= h
->root
.u
.def
.section
;
877 /* Perhaps we should detect the cases that
878 sec->output_section is expected to be NULL like i386 and
879 m68k, but apparently (and according to elfxx-ia64.c) all
880 valid cases are where the symbol is defined in a shared
881 object which we link dynamically against. This includes
882 PLT relocs for which we've created a PLT entry and other
883 relocs for which we're prepared to create dynamic
886 For now, new situations cause us to just err when
887 sec->output_offset is NULL but the object with the symbol
888 is *not* dynamically linked against. Thus this will
889 automatically remind us so we can see if there are other
890 valid cases we need to revisit. */
891 if ((sec
->output_section
== NULL
892 && (sec
->owner
->flags
& DYNAMIC
) != 0)
894 /* Here follow the cases where the relocation value must
895 be zero (or when further handling is simplified when
896 zero). I can't claim to understand the various
897 conditions and they weren't described in the files
898 where I copied them from (elf32-m68k.c and
899 elf32-i386.c), but let's mention examples of where
900 they happen. FIXME: Perhaps define and use a
901 dynamic_symbol_p function like ia64.
903 - When creating a shared library, we can have an
904 ordinary relocation for a symbol defined in a shared
905 library (perhaps the one we create). We then make
906 the relocation value zero, as the value seen now will
907 be added into the relocation addend in this shared
908 library, but must be handled only at dynamic-link
909 time. FIXME: Not sure this example covers the
910 h->elf_link_hash_flags test, though it's there in
913 && ((! info
->symbolic
&& h
->dynindx
!= -1)
914 || (h
->elf_link_hash_flags
915 & ELF_LINK_HASH_DEF_REGULAR
) == 0)
916 && (input_section
->flags
& SEC_ALLOC
) != 0
917 && (r_type
== R_CRIS_8
918 || r_type
== R_CRIS_16
919 || r_type
== R_CRIS_32
920 || r_type
== R_CRIS_8_PCREL
921 || r_type
== R_CRIS_16_PCREL
922 || r_type
== R_CRIS_32_PCREL
)))
924 else if (sec
->output_section
!= NULL
)
925 relocation
= (h
->root
.u
.def
.value
926 + sec
->output_section
->vma
927 + sec
->output_offset
);
930 (*_bfd_error_handler
)
931 (_("%s: unresolvable relocation %s against symbol `%s' from %s section"),
932 bfd_archive_filename (input_bfd
),
933 cris_elf_howto_table
[r_type
].name
,
935 bfd_get_section_name (input_bfd
, input_section
));
936 bfd_set_error (bfd_error_bad_value
);
940 else if (h
->root
.type
== bfd_link_hash_undefweak
)
942 else if (info
->shared
943 && (!info
->symbolic
|| info
->allow_shlib_undefined
)
944 && !info
->no_undefined
945 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
949 if (!(info
->callbacks
->undefined_symbol
950 (info
, symname
, input_bfd
,
951 input_section
, rel
->r_offset
,
952 (!info
->shared
|| info
->no_undefined
953 || ELF_ST_VISIBILITY (h
->other
)))))
961 case R_CRIS_16_GOTPLT
:
962 case R_CRIS_32_GOTPLT
:
963 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
964 but we require a PLT, and the PLT handling will take care of
965 filling in the PLT-specific GOT entry. For the GOT offset,
966 calculate it as we do when filling it in for the .got.plt
967 section. If we don't have a PLT, punt to GOT handling. */
969 && ((struct elf_cris_link_hash_entry
*) h
)->gotplt_offset
!= 0)
972 = bfd_get_section_by_name (dynobj
, ".got.plt");
975 BFD_ASSERT (h
->dynindx
!= -1);
976 BFD_ASSERT (sgotplt
!= NULL
);
979 = ((struct elf_cris_link_hash_entry
*) h
)->gotplt_offset
;
981 relocation
= got_offset
;
985 /* We didn't make a PLT entry for this symbol. Maybe everything is
986 folded into the GOT. Other than folding, this happens when
987 statically linking PIC code, or when using -Bsymbolic. Check
988 that we instead have a GOT entry as done for us by
989 elf_cris_adjust_dynamic_symbol, and drop through into the
990 ordinary GOT cases. */
991 if (h
!= NULL
&& h
->got
.offset
== (bfd_vma
) -1)
993 (*_bfd_error_handler
)
994 (_("%s: No PLT nor GOT for relocation %s against symbol `%s' from %s section"),
995 bfd_archive_filename (input_bfd
),
996 cris_elf_howto_table
[r_type
].name
,
997 symname
[0] != '\0' ? symname
: _("[whose name is lost]"),
998 bfd_get_section_name (input_bfd
, input_section
));
1000 /* FIXME: Perhaps blaming input is not the right thing to
1001 do; this is probably an internal error. But it is true
1002 that we didn't like that particular input. */
1003 bfd_set_error (bfd_error_bad_value
);
1008 /* The size of the actual relocation is not used here; we only
1009 fill in the GOT table here. */
1015 /* Note that despite using RELA relocations, the .got contents
1016 is always filled in with the link-relative relocation
1017 value; the addend. */
1021 off
= h
->got
.offset
;
1022 BFD_ASSERT (off
!= (bfd_vma
) -1);
1024 if (!elf_hash_table (info
)->dynamic_sections_created
1026 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
))
1028 && (info
->symbolic
|| h
->dynindx
== -1)
1029 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
1031 /* This wasn't checked above for ! info->shared, but
1032 must hold there if we get here; the symbol must be
1033 defined in the regular program, or be undefweak. */
1034 BFD_ASSERT (!elf_hash_table (info
)->dynamic_sections_created
1036 || (h
->elf_link_hash_flags
1037 & ELF_LINK_HASH_DEF_REGULAR
) != 0
1038 || h
->root
.type
== bfd_link_hash_undefweak
);
1040 /* This is actually a static link, or it is a
1041 -Bsymbolic link and the symbol is defined locally,
1042 or is undefweak, or the symbol was forced to be
1043 local because of a version file, or we're not
1044 creating a dynamic object. We must initialize this
1045 entry in the global offset table. Since the offset
1046 must always be a multiple of 4, we use the least
1047 significant bit to record whether we have
1048 initialized it already.
1050 If this GOT entry should be runtime-initialized, we
1051 will create a .rela.got relocation entry to
1052 initialize the value. This is done in the
1053 finish_dynamic_symbol routine. */
1058 bfd_put_32 (output_bfd
, relocation
,
1059 sgot
->contents
+ off
);
1066 BFD_ASSERT (local_got_offsets
!= NULL
1067 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
1069 off
= local_got_offsets
[r_symndx
];
1071 /* The offset must always be a multiple of 4. We use
1072 the least significant bit to record whether we have
1073 already generated the necessary reloc. */
1078 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1083 Elf_Internal_Rela outrel
;
1085 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
1086 BFD_ASSERT (srelgot
!= NULL
);
1088 outrel
.r_offset
= (sgot
->output_section
->vma
1089 + sgot
->output_offset
1091 outrel
.r_info
= ELF32_R_INFO (0, R_CRIS_RELATIVE
);
1092 outrel
.r_addend
= relocation
;
1093 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
1094 (((Elf32_External_Rela
*)
1096 + srelgot
->reloc_count
));
1097 ++srelgot
->reloc_count
;
1100 local_got_offsets
[r_symndx
] |= 1;
1104 relocation
= sgot
->output_offset
+ off
;
1105 if (rel
->r_addend
!= 0)
1107 /* We can't do anything for a relocation which is against
1108 a symbol *plus offset*. GOT holds relocations for
1109 symbols. Make this an error; the compiler isn't
1110 allowed to pass us these kinds of things. */
1112 (*_bfd_error_handler
)
1113 (_("%s: relocation %s with non-zero addend %d against local symbol from %s section"),
1114 bfd_archive_filename (input_bfd
),
1115 cris_elf_howto_table
[r_type
].name
,
1117 bfd_get_section_name (input_bfd
, input_section
));
1119 (*_bfd_error_handler
)
1120 (_("%s: relocation %s with non-zero addend %d against symbol `%s' from %s section"),
1121 bfd_archive_filename (input_bfd
),
1122 cris_elf_howto_table
[r_type
].name
,
1124 symname
[0] != '\0' ? symname
: _("[whose name is lost]"),
1125 bfd_get_section_name (input_bfd
, input_section
));
1127 bfd_set_error (bfd_error_bad_value
);
1133 case R_CRIS_32_GOTREL
:
1134 /* This relocation must only be performed against local symbols. */
1135 if (h
!= NULL
&& ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
1137 (*_bfd_error_handler
)
1138 (_("%s: relocation %s is not allowed for global symbol: `%s' from %s section"),
1139 bfd_archive_filename (input_bfd
),
1140 cris_elf_howto_table
[r_type
].name
,
1142 bfd_get_section_name (input_bfd
, input_section
));
1143 bfd_set_error (bfd_error_bad_value
);
1147 /* This can happen if we get a link error with the input ELF
1148 variant mismatching the output variant. Emit an error so
1149 it's noticed if it happens elsewhere. */
1152 (*_bfd_error_handler
)
1153 (_("%s: relocation %s in section %s with no GOT created"),
1154 bfd_archive_filename (input_bfd
),
1155 cris_elf_howto_table
[r_type
].name
,
1156 bfd_get_section_name (input_bfd
, input_section
));
1157 bfd_set_error (bfd_error_bad_value
);
1161 /* This relocation is like a PC-relative one, except the
1162 reference point is the location of GOT. Note that
1163 sgot->output_offset is not involved in this calculation. We
1164 always want the start of entire .got section, not the
1165 position after the reserved header. */
1166 relocation
-= sgot
->output_section
->vma
;
1169 case R_CRIS_32_PLT_PCREL
:
1170 /* Relocation is to the entry for this symbol in the
1171 procedure linkage table. */
1173 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1174 without using the procedure linkage table. */
1175 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
1178 if (h
->plt
.offset
== (bfd_vma
) -1
1181 /* We didn't make a PLT entry for this symbol. This
1182 happens when statically linking PIC code, or when
1183 using -Bsymbolic. */
1187 relocation
= (splt
->output_section
->vma
1188 + splt
->output_offset
1192 case R_CRIS_32_PLT_GOTREL
:
1193 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1194 start of the .got section. See also comment at
1196 relocation
-= sgot
->output_section
->vma
;
1198 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1199 without using the procedure linkage table. */
1200 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
1203 if (h
->plt
.offset
== (bfd_vma
) -1
1206 /* We didn't make a PLT entry for this symbol. This
1207 happens when statically linking PIC code, or when
1208 using -Bsymbolic. */
1212 relocation
= (splt
->output_section
->vma
1213 + splt
->output_offset
1215 - sgot
->output_section
->vma
);
1218 case R_CRIS_8_PCREL
:
1219 case R_CRIS_16_PCREL
:
1220 case R_CRIS_32_PCREL
:
1221 /* If the symbol was local, we need no shlib-specific handling. */
1222 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
1231 && (input_section
->flags
& SEC_ALLOC
) != 0
1232 && ((r_type
!= R_CRIS_8_PCREL
1233 && r_type
!= R_CRIS_16_PCREL
1234 && r_type
!= R_CRIS_32_PCREL
)
1236 || (h
->elf_link_hash_flags
1237 & ELF_LINK_HASH_DEF_REGULAR
) == 0)))
1239 Elf_Internal_Rela outrel
;
1240 boolean skip
, relocate
;
1242 /* When generating a shared object, these relocations
1243 are copied into the output file to be resolved at run
1250 name
= (bfd_elf_string_from_elf_section
1252 elf_elfheader (input_bfd
)->e_shstrndx
,
1253 elf_section_data (input_section
)->rel_hdr
.sh_name
));
1257 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
1258 && strcmp (bfd_get_section_name (input_bfd
,
1262 sreloc
= bfd_get_section_by_name (dynobj
, name
);
1264 /* That section should have been created in
1265 cris_elf_check_relocs, but that function will not be
1266 called for objects which fail in
1267 cris_elf_merge_private_bfd_data. */
1270 (*_bfd_error_handler
)
1271 (_("%s: Internal inconsistency; no relocation section %s"),
1272 bfd_archive_filename (input_bfd
),
1275 bfd_set_error (bfd_error_bad_value
);
1284 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1286 if (outrel
.r_offset
== (bfd_vma
) -1)
1288 else if (outrel
.r_offset
== (bfd_vma
) -2)
1289 skip
= true, relocate
= true;
1290 outrel
.r_offset
+= (input_section
->output_section
->vma
1291 + input_section
->output_offset
);
1294 memset (&outrel
, 0, sizeof outrel
);
1295 /* h->dynindx may be -1 if the symbol was marked to
1298 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1299 || (h
->elf_link_hash_flags
1300 & ELF_LINK_HASH_DEF_REGULAR
) == 0))
1302 BFD_ASSERT (h
->dynindx
!= -1);
1303 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
1304 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1308 if (r_type
== R_CRIS_32
)
1311 outrel
.r_info
= ELF32_R_INFO (0, R_CRIS_RELATIVE
);
1312 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1319 sec
= local_sections
[r_symndx
];
1322 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
1324 == bfd_link_hash_defweak
));
1325 sec
= h
->root
.u
.def
.section
;
1327 if (sec
!= NULL
&& bfd_is_abs_section (sec
))
1329 else if (sec
== NULL
|| sec
->owner
== NULL
)
1331 bfd_set_error (bfd_error_bad_value
);
1338 osec
= sec
->output_section
;
1339 indx
= elf_section_data (osec
)->dynindx
;
1340 BFD_ASSERT (indx
> 0);
1343 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
1344 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1348 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
1349 (((Elf32_External_Rela
*)
1351 + sreloc
->reloc_count
));
1352 ++sreloc
->reloc_count
;
1354 /* This reloc will be computed at runtime, so there's no
1355 need to do anything now, except for R_CRIS_32 relocations
1356 that have been turned into R_CRIS_RELATIVE. */
1364 r
= cris_final_link_relocate (howto
, input_bfd
, input_section
,
1365 contents
, rel
, relocation
);
1367 if (r
!= bfd_reloc_ok
)
1369 const char * msg
= (const char *) NULL
;
1373 case bfd_reloc_overflow
:
1374 r
= info
->callbacks
->reloc_overflow
1375 (info
, symname
, howto
->name
, (bfd_vma
) 0,
1376 input_bfd
, input_section
, rel
->r_offset
);
1379 case bfd_reloc_undefined
:
1380 r
= info
->callbacks
->undefined_symbol
1381 (info
, symname
, input_bfd
, input_section
, rel
->r_offset
,
1385 case bfd_reloc_outofrange
:
1386 msg
= _("internal error: out of range error");
1389 case bfd_reloc_notsupported
:
1390 msg
= _("internal error: unsupported relocation error");
1393 case bfd_reloc_dangerous
:
1394 msg
= _("internal error: dangerous relocation");
1398 msg
= _("internal error: unknown error");
1403 r
= info
->callbacks
->warning
1404 (info
, msg
, symname
, input_bfd
, input_section
, rel
->r_offset
);
1414 /* Finish up dynamic symbol handling. We set the contents of various
1415 dynamic sections here. */
1418 elf_cris_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
1420 struct bfd_link_info
*info
;
1421 struct elf_link_hash_entry
*h
;
1422 Elf_Internal_Sym
*sym
;
1425 int plt_off1
= 2, plt_off2
= 10, plt_off3
= 16;
1427 dynobj
= elf_hash_table (info
)->dynobj
;
1429 if (h
->plt
.offset
!= (bfd_vma
) -1)
1437 bfd_vma gotplt_offset
1438 = ((struct elf_cris_link_hash_entry
*) h
)->gotplt_offset
;
1439 Elf_Internal_Rela rela
;
1440 boolean has_gotplt
= gotplt_offset
!= 0;
1442 /* Get the index in the procedure linkage table which
1443 corresponds to this symbol. This is the index of this symbol
1444 in all the symbols for which we are making plt entries. The
1445 first entry in the procedure linkage table is reserved. */
1446 /* We have to count backwards here, and the result is only valid as
1447 an index into .got.plt and its relocations. FIXME: Constants... */
1448 bfd_vma gotplt_index
= gotplt_offset
/4 - 3;
1450 /* Get the offset into the .got table of the entry that corresponds
1451 to this function. Note that we embed knowledge that "incoming"
1452 .got goes after .got.plt in the output without padding (pointer
1453 aligned). However, that knowledge is present in several other
1454 places too, here and in elflink.h at least. */
1458 : h
->got
.offset
+ elf_cris_hash_table(info
)->next_gotplt_entry
);
1460 /* This symbol has an entry in the procedure linkage table. Set it
1463 BFD_ASSERT (h
->dynindx
!= -1);
1465 splt
= bfd_get_section_by_name (dynobj
, ".plt");
1466 sgot
= bfd_get_section_by_name (dynobj
, ".got");
1467 sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
1468 srela
= bfd_get_section_by_name (dynobj
, ".rela.plt");
1469 BFD_ASSERT (splt
!= NULL
&& sgotplt
!= NULL
1470 && (! has_gotplt
|| srela
!= NULL
));
1472 got_base
= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
1474 /* Fill in the entry in the procedure linkage table. */
1477 memcpy (splt
->contents
+ h
->plt
.offset
, elf_cris_plt_entry
,
1480 /* We need to enter the absolute address of the GOT entry here. */
1481 bfd_put_32 (output_bfd
, got_base
+ got_offset
,
1482 splt
->contents
+ h
->plt
.offset
+ plt_off1
);
1486 memcpy (splt
->contents
+ h
->plt
.offset
, elf_cris_pic_plt_entry
,
1488 bfd_put_32 (output_bfd
, got_offset
,
1489 splt
->contents
+ h
->plt
.offset
+ plt_off1
);
1492 /* Fill in the plt entry and make a relocation, if this is a "real"
1496 /* Fill in the offset into the reloc table. */
1497 bfd_put_32 (output_bfd
,
1498 gotplt_index
* sizeof (Elf32_External_Rela
),
1499 splt
->contents
+ h
->plt
.offset
+ plt_off2
);
1501 /* Fill in the offset to the first PLT entry, where to "jump". */
1502 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ plt_off3
+ 4),
1503 splt
->contents
+ h
->plt
.offset
+ plt_off3
);
1505 /* Fill in the entry in the global offset table with the address of
1506 the relocating stub. */
1507 bfd_put_32 (output_bfd
,
1508 (splt
->output_section
->vma
1509 + splt
->output_offset
1512 sgotplt
->contents
+ got_offset
);
1514 /* Fill in the entry in the .rela.plt section. */
1515 rela
.r_offset
= (sgotplt
->output_section
->vma
1516 + sgotplt
->output_offset
1518 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_CRIS_JUMP_SLOT
);
1520 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
1521 ((Elf32_External_Rela
*) srela
->contents
1525 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1527 /* Mark the symbol as undefined, rather than as defined in
1528 the .plt section. Leave the value alone. */
1529 sym
->st_shndx
= SHN_UNDEF
;
1531 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
1532 know whether resetting the value is significant; if it really
1533 is, rather than a quirk or bug in the sparc port, then I
1534 believe we'd see this elsewhere. */
1535 /* If the symbol is weak, we do need to clear the value.
1536 Otherwise, the PLT entry would provide a definition for
1537 the symbol even if the symbol wasn't defined anywhere,
1538 and so the symbol would never be NULL. */
1539 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR_NONWEAK
)
1545 /* We don't emit .got relocs for symbols that aren't in the
1546 dynamic-symbols table for an ordinary program and are either defined
1547 by the program or are undefined weak symbols. */
1548 if (h
->got
.offset
!= (bfd_vma
) -1
1550 || (h
->dynindx
!= -1
1551 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
1552 && h
->root
.type
!= bfd_link_hash_undefweak
)))
1556 Elf_Internal_Rela rela
;
1559 /* This symbol has an entry in the global offset table. Set it up. */
1561 sgot
= bfd_get_section_by_name (dynobj
, ".got");
1562 srela
= bfd_get_section_by_name (dynobj
, ".rela.got");
1563 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
1565 rela
.r_offset
= (sgot
->output_section
->vma
1566 + sgot
->output_offset
1567 + (h
->got
.offset
&~ (bfd_vma
) 1));
1569 /* If this is a static link, or it is a -Bsymbolic link and the
1570 symbol is defined locally or was forced to be local because
1571 of a version file, we just want to emit a RELATIVE reloc.
1572 The entry in the global offset table will already have been
1573 initialized in the relocate_section function. */
1574 where
= sgot
->contents
+ (h
->got
.offset
&~ (bfd_vma
) 1);
1575 if (! elf_hash_table (info
)->dynamic_sections_created
1577 && (info
->symbolic
|| h
->dynindx
== -1)
1578 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
1580 rela
.r_info
= ELF32_R_INFO (0, R_CRIS_RELATIVE
);
1581 rela
.r_addend
= bfd_get_signed_32 (output_bfd
, where
);
1585 bfd_put_32 (output_bfd
, (bfd_vma
) 0, where
);
1586 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_CRIS_GLOB_DAT
);
1590 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
1591 ((Elf32_External_Rela
*) srela
->contents
1592 + srela
->reloc_count
));
1593 ++srela
->reloc_count
;
1596 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
1599 Elf_Internal_Rela rela
;
1601 /* This symbol needs a copy reloc. Set it up. */
1603 BFD_ASSERT (h
->dynindx
!= -1
1604 && (h
->root
.type
== bfd_link_hash_defined
1605 || h
->root
.type
== bfd_link_hash_defweak
));
1607 s
= bfd_get_section_by_name (h
->root
.u
.def
.section
->owner
,
1609 BFD_ASSERT (s
!= NULL
);
1611 rela
.r_offset
= (h
->root
.u
.def
.value
1612 + h
->root
.u
.def
.section
->output_section
->vma
1613 + h
->root
.u
.def
.section
->output_offset
);
1614 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_CRIS_COPY
);
1616 bfd_elf32_swap_reloca_out (output_bfd
, &rela
,
1617 ((Elf32_External_Rela
*) s
->contents
1622 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1623 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
1624 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
1625 sym
->st_shndx
= SHN_ABS
;
1630 /* Finish up the dynamic sections. */
1633 elf_cris_finish_dynamic_sections (output_bfd
, info
)
1635 struct bfd_link_info
*info
;
1641 dynobj
= elf_hash_table (info
)->dynobj
;
1643 sgot
= bfd_get_section_by_name (dynobj
, ".got.plt");
1644 BFD_ASSERT (sgot
!= NULL
);
1645 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
1647 if (elf_hash_table (info
)->dynamic_sections_created
)
1650 Elf32_External_Dyn
*dyncon
, *dynconend
;
1652 splt
= bfd_get_section_by_name (dynobj
, ".plt");
1653 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
1655 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
1656 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
1657 for (; dyncon
< dynconend
; dyncon
++)
1659 Elf_Internal_Dyn dyn
;
1662 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
1670 s
= bfd_get_section_by_name (output_bfd
, ".got");
1671 BFD_ASSERT (s
!= NULL
);
1672 dyn
.d_un
.d_ptr
= s
->vma
;
1673 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1677 /* Yes, we *can* have a .plt and no .plt.rela, for instance
1678 if all symbols are found in the .got (not .got.plt). */
1679 s
= bfd_get_section_by_name (output_bfd
, ".rela.plt");
1680 dyn
.d_un
.d_ptr
= s
!= NULL
? s
->vma
: 0;
1681 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1685 s
= bfd_get_section_by_name (output_bfd
, ".rela.plt");
1688 else if (s
->_cooked_size
!= 0)
1689 dyn
.d_un
.d_val
= s
->_cooked_size
;
1691 dyn
.d_un
.d_val
= s
->_raw_size
;
1692 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1696 /* The procedure linkage table relocs (DT_JMPREL) should
1697 not be included in the overall relocs (DT_RELA).
1698 Therefore, we override the DT_RELASZ entry here to
1699 make it not include the JMPREL relocs. Since the
1700 linker script arranges for .rela.plt to follow all
1701 other relocation sections, we don't have to worry
1702 about changing the DT_RELA entry. */
1703 s
= bfd_get_section_by_name (output_bfd
, ".rela.plt");
1706 if (s
->_cooked_size
!= 0)
1707 dyn
.d_un
.d_val
-= s
->_cooked_size
;
1709 dyn
.d_un
.d_val
-= s
->_raw_size
;
1711 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1716 /* Fill in the first entry in the procedure linkage table. */
1717 if (splt
->_raw_size
> 0)
1720 memcpy (splt
->contents
, elf_cris_pic_plt0_entry
, PLT_ENTRY_SIZE
);
1723 memcpy (splt
->contents
, elf_cris_plt0_entry
, PLT_ENTRY_SIZE
);
1724 bfd_put_32 (output_bfd
,
1725 sgot
->output_section
->vma
+ sgot
->output_offset
+ 4,
1726 splt
->contents
+ 6);
1727 bfd_put_32 (output_bfd
,
1728 sgot
->output_section
->vma
+ sgot
->output_offset
+ 8,
1729 splt
->contents
+ 14);
1731 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
1737 /* Fill in the first three entries in the global offset table. */
1738 if (sgot
->_raw_size
> 0)
1741 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
1743 bfd_put_32 (output_bfd
,
1744 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
1746 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
1747 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
1750 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
1755 /* Return the section that should be marked against GC for a given
1759 cris_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
)
1761 struct bfd_link_info
* info ATTRIBUTE_UNUSED
;
1762 Elf_Internal_Rela
* rel
;
1763 struct elf_link_hash_entry
* h
;
1764 Elf_Internal_Sym
* sym
;
1768 switch (ELF32_R_TYPE (rel
->r_info
))
1770 case R_CRIS_GNU_VTINHERIT
:
1771 case R_CRIS_GNU_VTENTRY
:
1775 switch (h
->root
.type
)
1777 case bfd_link_hash_defined
:
1778 case bfd_link_hash_defweak
:
1779 return h
->root
.u
.def
.section
;
1781 case bfd_link_hash_common
:
1782 return h
->root
.u
.c
.p
->section
;
1790 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
1795 /* Update the got entry reference counts for the section being removed. */
1798 cris_elf_gc_sweep_hook (abfd
, info
, sec
, relocs
)
1799 bfd
* abfd ATTRIBUTE_UNUSED
;
1800 struct bfd_link_info
* info ATTRIBUTE_UNUSED
;
1801 asection
* sec ATTRIBUTE_UNUSED
;
1802 const Elf_Internal_Rela
* relocs ATTRIBUTE_UNUSED
;
1804 Elf_Internal_Shdr
*symtab_hdr
;
1805 struct elf_link_hash_entry
**sym_hashes
;
1806 bfd_signed_vma
*local_got_refcounts
;
1807 const Elf_Internal_Rela
*rel
, *relend
;
1808 unsigned long r_symndx
;
1809 struct elf_link_hash_entry
*h
;
1814 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1815 sym_hashes
= elf_sym_hashes (abfd
);
1816 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1818 dynobj
= elf_hash_table (info
)->dynobj
;
1822 sgot
= bfd_get_section_by_name (dynobj
, ".got");
1823 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
1825 relend
= relocs
+ sec
->reloc_count
;
1826 for (rel
= relocs
; rel
< relend
; rel
++)
1828 switch (ELF32_R_TYPE (rel
->r_info
))
1832 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1833 if (r_symndx
>= symtab_hdr
->sh_info
)
1835 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1836 if (h
->got
.refcount
> 0)
1839 if (h
->got
.refcount
== 0)
1841 /* We don't need the .got entry any more. */
1842 sgot
->_raw_size
-= 4;
1843 srelgot
->_raw_size
-= sizeof (Elf32_External_Rela
);
1850 if (local_got_refcounts
!= NULL
)
1852 if (local_got_refcounts
[r_symndx
] > 0)
1854 --local_got_refcounts
[r_symndx
];
1855 if (local_got_refcounts
[r_symndx
] == 0)
1857 /* We don't need the .got entry any more. */
1858 sgot
->_raw_size
-= 4;
1860 srelgot
->_raw_size
-= sizeof (Elf32_External_Rela
);
1866 case R_CRIS_16_GOTPLT
:
1867 case R_CRIS_32_GOTPLT
:
1868 /* For local symbols, treat these like GOT relocs. */
1869 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1870 if (r_symndx
< symtab_hdr
->sh_info
)
1871 goto local_got_reloc
;
1873 case R_CRIS_32_PLT_GOTREL
:
1874 /* FIXME: We don't garbage-collect away the .got section. */
1875 if (local_got_refcounts
!= NULL
)
1876 local_got_refcounts
[-1]--;
1879 case R_CRIS_8_PCREL
:
1880 case R_CRIS_16_PCREL
:
1881 case R_CRIS_32_PCREL
:
1882 case R_CRIS_32_PLT_PCREL
:
1883 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1884 if (r_symndx
>= symtab_hdr
->sh_info
)
1886 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1887 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1888 && h
->plt
.refcount
> 0)
1901 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1902 entry but we found we will not create any. Called when we find we will
1903 not have any PLT for this symbol, by for example
1904 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
1905 or elf_cris_size_dynamic_sections if no dynamic sections will be
1906 created (we're only linking static objects). */
1909 elf_cris_adjust_gotplt_to_got (h
, p
)
1910 struct elf_cris_link_hash_entry
*h
;
1913 struct bfd_link_info
*info
= (struct bfd_link_info
*) p
;
1914 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
1916 BFD_ASSERT (dynobj
!= NULL
);
1918 if (h
->root
.root
.type
== bfd_link_hash_warning
)
1919 h
= (struct elf_cris_link_hash_entry
*) h
->root
.root
.u
.i
.link
;
1921 /* If nobody wanted a GOTPLT with this symbol, we're done. */
1922 if (h
->gotplt_refcount
<= 0)
1925 if (h
->root
.got
.refcount
> 0)
1927 /* There's a GOT entry for this symbol. Just adjust the refcount.
1928 Probably not necessary at this stage, but keeping it accurate
1929 helps avoiding surprises later. */
1930 h
->root
.got
.refcount
+= h
->gotplt_refcount
;
1931 h
->gotplt_refcount
= -1;
1935 /* No GOT entry for this symbol. We need to create one. */
1936 asection
*sgot
= bfd_get_section_by_name (dynobj
, ".got");
1938 = bfd_get_section_by_name (dynobj
, ".rela.got");
1940 /* Put an accurate refcount there. */
1941 h
->root
.got
.refcount
= h
->gotplt_refcount
;
1943 h
->gotplt_refcount
= -1;
1945 /* We always have a .got and a .rela.got section if there were
1946 GOTPLT relocs in input. */
1947 BFD_ASSERT (sgot
!= NULL
&& srelgot
!= NULL
);
1949 /* Allocate space in the .got section. */
1950 sgot
->_raw_size
+= 4;
1952 /* Allocate relocation space. */
1953 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
1959 /* Try to fold PLT entries with GOT entries. There are two cases when we
1962 - When all PLT references are GOTPLT references, and there are GOT
1963 references. We don't have to generate a PLT at all.
1965 - When there are both (ordinary) PLT references and GOT references.
1966 We want to make the PLT reference use the ordinary GOT entry rather
1967 than a run-time dynamically resolved GOTPLT entry (since the GOT
1968 entry will have to be resolved at startup anyway).
1970 Though the latter case is handled when room for the PLT is allocated,
1973 Note that this function is called before symbols are forced local by
1974 version scripts. The differing cases are handled by
1975 elf_cris_hide_symbol. */
1978 elf_cris_try_fold_plt_to_got (h
, p
)
1979 struct elf_cris_link_hash_entry
*h
;
1982 struct bfd_link_info
*info
= (struct bfd_link_info
*) p
;
1984 /* If there are no GOT references for this symbol, we can't fold any
1985 other reference so there's nothing to do. Likewise if there are no
1986 PLT references; GOTPLT references included. */
1987 if (h
->root
.got
.refcount
<= 0 || h
->root
.plt
.refcount
<= 0)
1990 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
1991 BFD_ASSERT (h
->gotplt_refcount
<= h
->root
.plt
.refcount
);
1993 if (h
->gotplt_refcount
== h
->root
.plt
.refcount
)
1995 /* The only PLT references are GOTPLT references, and there are GOT
1996 references. Convert PLT to GOT references. */
1997 if (! elf_cris_adjust_gotplt_to_got (h
, info
))
2000 /* Clear the PLT references, so no PLT will be created. */
2001 h
->root
.plt
.offset
= (bfd_vma
) -1;
2007 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2008 to use a GOT entry (and create one) rather than requiring a GOTPLT
2012 elf_cris_hide_symbol (info
, h
, force_local
)
2013 struct bfd_link_info
*info
;
2014 struct elf_link_hash_entry
*h
;
2015 boolean force_local
;
2017 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry
*) h
, info
);
2019 _bfd_elf_link_hash_hide_symbol (info
, h
, force_local
);
2022 /* Adjust a symbol defined by a dynamic object and referenced by a
2023 regular object. The current definition is in some section of the
2024 dynamic object, but we're not including those sections. We have to
2025 change the definition to something the rest of the link can
2029 elf_cris_adjust_dynamic_symbol (info
, h
)
2030 struct bfd_link_info
*info
;
2031 struct elf_link_hash_entry
*h
;
2035 unsigned int power_of_two
;
2037 dynobj
= elf_hash_table (info
)->dynobj
;
2039 /* Make sure we know what is going on here. */
2040 BFD_ASSERT (dynobj
!= NULL
2041 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
)
2042 || h
->weakdef
!= NULL
2043 || ((h
->elf_link_hash_flags
2044 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2045 && (h
->elf_link_hash_flags
2046 & ELF_LINK_HASH_REF_REGULAR
) != 0
2047 && (h
->elf_link_hash_flags
2048 & ELF_LINK_HASH_DEF_REGULAR
) == 0)));
2050 /* If this is a function, put it in the procedure linkage table. We
2051 will fill in the contents of the procedure linkage table later,
2052 when we know the address of the .got section. */
2053 if (h
->type
== STT_FUNC
2054 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
2056 /* If we link a program (not a DSO), we'll get rid of unnecessary
2057 PLT entries; we point to the actual symbols -- even for pic
2058 relocs, because a program built with -fpic should have the same
2059 result as one built without -fpic, specifically considering weak
2061 FIXME: m68k and i386 differ here, for unclear reasons. */
2063 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0)
2065 /* This case can occur if we saw a PLT reloc in an input file,
2066 but the symbol was not defined by a dynamic object. In such
2067 a case, we don't actually need to build a procedure linkage
2068 table, and we can just do an absolute or PC reloc instead, or
2069 change a .got.plt index to a .got index for GOTPLT relocs. */
2070 BFD_ASSERT ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0);
2071 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
2072 h
->plt
.offset
= (bfd_vma
) -1;
2074 elf_cris_adjust_gotplt_to_got ((struct
2075 elf_cris_link_hash_entry
*) h
,
2079 /* If there are only GOT references and GOTPLT references to this
2080 PLT entry, get rid of the PLT. */
2081 if (! elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry
*)
2085 /* GC or folding may have rendered this entry unused. */
2086 if (h
->plt
.refcount
<= 0)
2088 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
2089 h
->plt
.offset
= (bfd_vma
) -1;
2093 /* Make sure this symbol is output as a dynamic symbol. */
2094 if (h
->dynindx
== -1)
2096 if (! bfd_elf32_link_record_dynamic_symbol (info
, h
))
2100 s
= bfd_get_section_by_name (dynobj
, ".plt");
2101 BFD_ASSERT (s
!= NULL
);
2103 /* If this is the first .plt entry, make room for the special
2105 if (s
->_raw_size
== 0)
2106 s
->_raw_size
+= PLT_ENTRY_SIZE
;
2108 /* If this symbol is not defined in a regular file, and we are
2109 not generating a shared library, then set the symbol to this
2110 location in the .plt. */
2112 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2114 h
->root
.u
.def
.section
= s
;
2115 h
->root
.u
.def
.value
= s
->_raw_size
;
2118 /* If there's already a GOT entry, use that, not a .got.plt. A
2119 GOT field still has a reference count when we get here; it's
2120 not yet changed to an offset. */
2121 if (h
->got
.refcount
> 0)
2123 h
->got
.refcount
+= h
->plt
.refcount
;
2125 /* Mark the PLT offset to use the GOT entry by setting the low
2126 bit in the plt offset; it is always a multiple of
2128 BFD_ASSERT ((s
->_raw_size
& 3) == 0);
2130 /* Change the PLT refcount to an offset. */
2131 h
->plt
.offset
= s
->_raw_size
;
2133 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2134 that the got entry should be used instead. */
2135 BFD_ASSERT (((struct elf_cris_link_hash_entry
*)
2136 h
)->gotplt_offset
== 0);
2138 /* Make room for this entry. */
2139 s
->_raw_size
+= PLT_ENTRY_SIZE
;
2144 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2145 h
->plt
.offset
= s
->_raw_size
;
2147 /* Make room for this entry. */
2148 s
->_raw_size
+= PLT_ENTRY_SIZE
;
2150 /* We also need to make an entry in the .got.plt section, which
2151 will be placed in the .got section by the linker script. */
2152 ((struct elf_cris_link_hash_entry
*) h
)->gotplt_offset
2153 = elf_cris_hash_table (info
)->next_gotplt_entry
;
2154 elf_cris_hash_table (info
)->next_gotplt_entry
+= 4;
2156 s
= bfd_get_section_by_name (dynobj
, ".got.plt");
2157 BFD_ASSERT (s
!= NULL
);
2160 /* We also need to make an entry in the .rela.plt section. */
2162 s
= bfd_get_section_by_name (dynobj
, ".rela.plt");
2163 BFD_ASSERT (s
!= NULL
);
2164 s
->_raw_size
+= sizeof (Elf32_External_Rela
);
2169 /* Reinitialize the plt offset now that it is not used as a reference
2171 h
->plt
.offset
= (bfd_vma
) -1;
2173 /* If this is a weak symbol, and there is a real definition, the
2174 processor independent code will have arranged for us to see the
2175 real definition first, and we can just use the same value. */
2176 if (h
->weakdef
!= NULL
)
2178 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
2179 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
2180 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
2181 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
2185 /* This is a reference to a symbol defined by a dynamic object which
2186 is not a function. */
2188 /* If we are creating a shared library, we must presume that the
2189 only references to the symbol are via the global offset table.
2190 For such cases we need not do anything here; the relocations will
2191 be handled correctly by relocate_section. */
2195 /* If there are no references to this symbol that do not use the
2196 GOT, we don't need to generate a copy reloc. */
2197 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0)
2200 /* We must allocate the symbol in our .dynbss section, which will
2201 become part of the .bss section of the executable. There will be
2202 an entry for this symbol in the .dynsym section. The dynamic
2203 object will contain position independent code, so all references
2204 from the dynamic object to this symbol will go through the global
2205 offset table. The dynamic linker will use the .dynsym entry to
2206 determine the address it must put in the global offset table, so
2207 both the dynamic object and the regular object will refer to the
2208 same memory location for the variable. */
2210 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
2211 BFD_ASSERT (s
!= NULL
);
2213 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2214 copy the initial value out of the dynamic object and into the
2215 runtime process image. We need to remember the offset into the
2216 .rela.bss section we are going to use. */
2217 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2221 srel
= bfd_get_section_by_name (dynobj
, ".rela.bss");
2222 BFD_ASSERT (srel
!= NULL
);
2223 srel
->_raw_size
+= sizeof (Elf32_External_Rela
);
2224 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
2227 /* Historic precedent: m68k and i386 allow max 8-byte alignment for the
2228 thing to copy; so do we. */
2230 /* We need to figure out the alignment required for this symbol. I
2231 have no idea how ELF linkers handle this. */
2232 power_of_two
= bfd_log2 (h
->size
);
2233 if (power_of_two
> 3)
2236 /* Apply the required alignment. */
2237 s
->_raw_size
= BFD_ALIGN (s
->_raw_size
,
2238 (bfd_size_type
) (1 << power_of_two
));
2239 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
2241 if (!bfd_set_section_alignment (dynobj
, s
, power_of_two
))
2245 /* Define the symbol as being at this point in the section. */
2246 h
->root
.u
.def
.section
= s
;
2247 h
->root
.u
.def
.value
= s
->_raw_size
;
2249 /* Increment the section size to make room for the symbol. */
2250 s
->_raw_size
+= h
->size
;
2255 /* Look through the relocs for a section during the first phase. */
2258 cris_elf_check_relocs (abfd
, info
, sec
, relocs
)
2260 struct bfd_link_info
*info
;
2262 const Elf_Internal_Rela
*relocs
;
2265 Elf_Internal_Shdr
*symtab_hdr
;
2266 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
2267 bfd_signed_vma
*local_got_refcounts
;
2268 const Elf_Internal_Rela
*rel
;
2269 const Elf_Internal_Rela
*rel_end
;
2274 if (info
->relocateable
)
2277 dynobj
= elf_hash_table (info
)->dynobj
;
2278 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2279 sym_hashes
= elf_sym_hashes (abfd
);
2280 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof (Elf32_External_Sym
);
2281 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2287 if (!elf_bad_symtab (abfd
))
2288 sym_hashes_end
-= symtab_hdr
->sh_info
;
2290 rel_end
= relocs
+ sec
->reloc_count
;
2291 for (rel
= relocs
; rel
< rel_end
; rel
++)
2293 struct elf_link_hash_entry
*h
;
2294 unsigned long r_symndx
;
2295 enum elf_cris_reloc_type r_type
;
2297 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2298 if (r_symndx
< symtab_hdr
->sh_info
)
2301 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2303 r_type
= ELF32_R_TYPE (rel
->r_info
);
2305 /* Some relocs require linker-created sections; we need to hang them
2306 on the first input bfd we found that contained dynamic relocs. */
2311 case R_CRIS_32_GOTREL
:
2312 case R_CRIS_32_PLT_GOTREL
:
2313 case R_CRIS_32_PLT_PCREL
:
2314 case R_CRIS_16_GOTPLT
:
2315 case R_CRIS_32_GOTPLT
:
2318 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
2320 /* Create the .got section, so we can assume it's always
2321 present whenever there's a dynobj. */
2322 if (!_bfd_elf_create_got_section (dynobj
, info
))
2331 /* Some relocs require a global offset table (but perhaps not a
2332 specific GOT entry). */
2335 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
2336 entry only for local symbols. Unfortunately, we don't know
2337 until later on if there's a version script that forces the
2338 symbol local. We must have the .rela.got section in place
2339 before we know if the symbol looks global now, so we need
2340 to treat the reloc just like for R_CRIS_16_GOT and
2342 case R_CRIS_16_GOTPLT
:
2343 case R_CRIS_32_GOTPLT
:
2347 && (h
!= NULL
|| info
->shared
))
2349 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2350 if (srelgot
== NULL
)
2352 srelgot
= bfd_make_section (dynobj
, ".rela.got");
2354 || !bfd_set_section_flags (dynobj
, srelgot
,
2359 | SEC_LINKER_CREATED
2361 || !bfd_set_section_alignment (dynobj
, srelgot
, 2))
2367 case R_CRIS_32_GOTREL
:
2368 case R_CRIS_32_PLT_GOTREL
:
2370 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2372 if (local_got_refcounts
== NULL
)
2376 /* We use index local_got_refcounts[-1] to count all
2377 GOT-relative relocations that do not have explicit
2379 amt
= symtab_hdr
->sh_info
+ 1;
2380 amt
*= sizeof (bfd_signed_vma
);
2381 local_got_refcounts
= ((bfd_signed_vma
*) bfd_zalloc (abfd
, amt
));
2382 if (local_got_refcounts
== NULL
)
2385 local_got_refcounts
++;
2386 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2396 case R_CRIS_16_GOTPLT
:
2397 case R_CRIS_32_GOTPLT
:
2398 /* Mark that we need a GOT entry if the PLT entry (and its GOT
2399 entry) is eliminated. We can only do this for a non-local
2403 ((struct elf_cris_link_hash_entry
*) h
)->gotplt_refcount
++;
2404 goto handle_gotplt_reloc
;
2406 /* If h is NULL then this is a local symbol, and we must make a
2407 GOT entry for it, so handle it like a GOT reloc. */
2412 /* This symbol requires a global offset table entry. */
2415 if (h
->got
.refcount
== 0)
2417 /* Make sure this symbol is output as a dynamic symbol. */
2418 if (h
->dynindx
== -1)
2420 if (!bfd_elf32_link_record_dynamic_symbol (info
, h
))
2424 /* Allocate space in the .got section. */
2425 sgot
->_raw_size
+= 4;
2426 /* Allocate relocation space. */
2427 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2433 /* This is a global offset table entry for a local symbol. */
2434 if (local_got_refcounts
[r_symndx
] == 0)
2436 sgot
->_raw_size
+= 4;
2439 /* If we are generating a shared object, we need to
2440 output a R_CRIS_RELATIVE reloc so that the dynamic
2441 linker can adjust this GOT entry. */
2442 srelgot
->_raw_size
+= sizeof (Elf32_External_Rela
);
2445 local_got_refcounts
[r_symndx
]++;
2449 case R_CRIS_32_GOTREL
:
2450 /* This reference requires a global offset table.
2451 FIXME: The actual refcount isn't used currently; the .got
2452 section can't be removed if there were any references in the
2454 local_got_refcounts
[-1]++;
2457 handle_gotplt_reloc
:
2459 case R_CRIS_32_PLT_GOTREL
:
2460 /* This reference requires a global offset table. */
2461 local_got_refcounts
[-1]++;
2464 case R_CRIS_32_PLT_PCREL
:
2465 /* This symbol requires a procedure linkage table entry. We
2466 actually build the entry in adjust_dynamic_symbol,
2467 because this might be a case of linking PIC code which is
2468 never referenced by a dynamic object, in which case we
2469 don't need to generate a procedure linkage table entry
2472 /* If this is a local symbol, we resolve it directly without
2473 creating a procedure linkage table entry. */
2474 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2477 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
2484 /* Let's help debug shared library creation. Any of these
2485 relocs can be used in shared libs, but pages containing them
2486 cannot be shared. Don't warn for sections we don't care
2487 about, such as debug sections or non-constant sections. We
2488 can't help tables of (global) function pointers, for example,
2489 though they must be emitted in a data section to avoid having
2490 impure text sections. */
2492 && (sec
->flags
& SEC_ALLOC
) != 0
2493 && (sec
->flags
& SEC_READONLY
) != 0)
2495 /* FIXME: How do we make this optionally a warning only? */
2496 (*_bfd_error_handler
)
2497 (_("%s, section %s:\n relocation %s should not be used in a shared object; recompile with -fPIC"),
2498 bfd_archive_filename (abfd
),
2500 cris_elf_howto_table
[r_type
].name
);
2504 case R_CRIS_8_PCREL
:
2505 case R_CRIS_16_PCREL
:
2506 case R_CRIS_32_PCREL
:
2509 h
->elf_link_hash_flags
|= ELF_LINK_NON_GOT_REF
;
2511 /* Make sure a plt entry is created for this symbol if it
2512 turns out to be a function defined by a dynamic object. */
2513 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
2517 /* If we are creating a shared library and this is not a local
2518 symbol, we need to copy the reloc into the shared library.
2519 However when linking with -Bsymbolic and this is a global
2520 symbol which is defined in an object we are including in the
2521 link (i.e., DEF_REGULAR is set), then we can resolve the
2522 reloc directly. At this point we have not seen all the input
2523 files, so it is possible that DEF_REGULAR is not set now but
2524 will be set later (it is never cleared). In case of a weak
2525 definition, DEF_REGULAR may be cleared later by a strong
2526 definition in a shared library. We account for that
2527 possibility below by storing information in the relocs_copied
2528 field of the hash table entry. A similar situation occurs
2529 when creating shared libraries and symbol visibility changes
2530 render the symbol local. */
2532 /* No need to do anything if we're not creating a shared object. */
2536 /* We don't need to handle relocs into sections not going into
2537 the "real" output. */
2538 if ((sec
->flags
& SEC_ALLOC
) == 0)
2541 /* We can only eliminate PC-relative relocs. */
2542 if (r_type
== R_CRIS_8_PCREL
2543 || r_type
== R_CRIS_16_PCREL
2544 || r_type
== R_CRIS_32_PCREL
)
2546 /* If the symbol is local, then we can eliminate the reloc. */
2547 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2550 /* If this is with -Bsymbolic and the symbol isn't weak, and
2551 is defined by an ordinary object (the ones we include in
2552 this shared library) then we can also eliminate the
2553 reloc. See comment above for more eliminable cases which
2554 we can't identify at this time. */
2556 && h
->root
.type
!= bfd_link_hash_defweak
2557 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
2561 /* We create a reloc section in dynobj and make room for this
2567 name
= (bfd_elf_string_from_elf_section
2569 elf_elfheader (abfd
)->e_shstrndx
,
2570 elf_section_data (sec
)->rel_hdr
.sh_name
));
2574 BFD_ASSERT (strncmp (name
, ".rela", 5) == 0
2575 && strcmp (bfd_get_section_name (abfd
, sec
),
2578 sreloc
= bfd_get_section_by_name (dynobj
, name
);
2581 sreloc
= bfd_make_section (dynobj
, name
);
2583 || !bfd_set_section_flags (dynobj
, sreloc
,
2588 | SEC_LINKER_CREATED
2590 || !bfd_set_section_alignment (dynobj
, sreloc
, 2))
2593 if (sec
->flags
& SEC_READONLY
)
2594 info
->flags
|= DF_TEXTREL
;
2597 sreloc
->_raw_size
+= sizeof (Elf32_External_Rela
);
2599 /* If we are linking with -Bsymbolic, we count the number of PC
2600 relative relocations we have entered for this symbol, so that
2601 we can discard them again if the symbol is later defined by a
2602 regular object. We know that h is really a pointer to an
2603 elf_cris_link_hash_entry. */
2604 if ((r_type
== R_CRIS_8_PCREL
2605 || r_type
== R_CRIS_16_PCREL
2606 || r_type
== R_CRIS_32_PCREL
)
2609 struct elf_cris_link_hash_entry
*eh
;
2610 struct elf_cris_pcrel_relocs_copied
*p
;
2612 eh
= (struct elf_cris_link_hash_entry
*) h
;
2614 for (p
= eh
->pcrel_relocs_copied
; p
!= NULL
; p
= p
->next
)
2615 if (p
->section
== sreloc
)
2620 p
= ((struct elf_cris_pcrel_relocs_copied
*)
2621 bfd_alloc (dynobj
, (bfd_size_type
) sizeof *p
));
2624 p
->next
= eh
->pcrel_relocs_copied
;
2625 eh
->pcrel_relocs_copied
= p
;
2626 p
->section
= sreloc
;
2634 /* This relocation describes the C++ object vtable hierarchy.
2635 Reconstruct it for later use during GC. */
2636 case R_CRIS_GNU_VTINHERIT
:
2637 if (!_bfd_elf32_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2641 /* This relocation describes which C++ vtable entries are actually
2642 used. Record for later use during GC. */
2643 case R_CRIS_GNU_VTENTRY
:
2644 if (!_bfd_elf32_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2649 /* Other relocs do not appear here. */
2650 bfd_set_error (bfd_error_bad_value
);
2658 /* Set the sizes of the dynamic sections. */
2661 elf_cris_size_dynamic_sections (output_bfd
, info
)
2662 bfd
*output_bfd ATTRIBUTE_UNUSED
;
2663 struct bfd_link_info
*info
;
2670 dynobj
= elf_hash_table (info
)->dynobj
;
2671 BFD_ASSERT (dynobj
!= NULL
);
2673 if (elf_hash_table (info
)->dynamic_sections_created
)
2675 /* Set the contents of the .interp section to the interpreter. */
2678 s
= bfd_get_section_by_name (dynobj
, ".interp");
2679 BFD_ASSERT (s
!= NULL
);
2680 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2681 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2686 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
2687 elf_cris_link_hash_traverse (elf_cris_hash_table (info
),
2688 elf_cris_adjust_gotplt_to_got
,
2691 /* We may have created entries in the .rela.got section.
2692 However, if we are not creating the dynamic sections, we will
2693 not actually use these entries. Reset the size of .rela.got,
2694 which will cause it to get stripped from the output file
2696 s
= bfd_get_section_by_name (dynobj
, ".rela.got");
2701 /* If this is a -Bsymbolic shared link, then we need to discard all PC
2702 relative relocs against symbols defined in a regular object. We
2703 allocated space for them in the check_relocs routine, but we will not
2704 fill them in in the relocate_section routine. We also discard space
2705 for relocs that have become for local symbols due to symbol
2706 visibility changes. For programs, we discard space for relocs for
2707 symbols not referenced by any dynamic object. */
2709 elf_cris_link_hash_traverse (elf_cris_hash_table (info
),
2710 elf_cris_discard_excess_dso_dynamics
,
2713 elf_cris_link_hash_traverse (elf_cris_hash_table (info
),
2714 elf_cris_discard_excess_program_dynamics
,
2717 /* The check_relocs and adjust_dynamic_symbol entry points have
2718 determined the sizes of the various dynamic sections. Allocate
2722 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2727 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2730 /* It's OK to base decisions on the section name, because none
2731 of the dynobj section names depend upon the input files. */
2732 name
= bfd_get_section_name (dynobj
, s
);
2736 if (strcmp (name
, ".plt") == 0)
2738 if (s
->_raw_size
== 0)
2740 /* Strip this section if we don't need it; see the
2746 /* Remember whether there is a PLT. */
2750 else if (strncmp (name
, ".rela", 5) == 0)
2752 if (s
->_raw_size
== 0)
2754 /* If we don't need this section, strip it from the
2755 output file. This is mostly to handle .rela.bss and
2756 .rela.plt. We must create both sections in
2757 create_dynamic_sections, because they must be created
2758 before the linker maps input sections to output
2759 sections. The linker does that before
2760 adjust_dynamic_symbol is called, and it is that
2761 function which decides whether anything needs to go
2762 into these sections. */
2767 /* Remember whether there are any reloc sections other
2769 if (strcmp (name
, ".rela.plt") != 0)
2772 /* We use the reloc_count field as a counter if we need
2773 to copy relocs into the output file. */
2777 else if (strncmp (name
, ".got", 4) != 0)
2779 /* It's not one of our sections, so don't allocate space. */
2785 _bfd_strip_section_from_output (info
, s
);
2789 /* Allocate memory for the section contents. We use bfd_zalloc here
2790 in case unused entries are not reclaimed before the section's
2791 contents are written out. This should not happen, but this way
2792 if it does, we will not write out garbage. For reloc sections,
2793 this will make entries have the type R_CRIS_NONE. */
2794 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
2795 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2799 if (elf_hash_table (info
)->dynamic_sections_created
)
2801 /* Add some entries to the .dynamic section. We fill in the
2802 values later, in elf_cris_finish_dynamic_sections, but we
2803 must add the entries now so that we get the correct size for
2804 the .dynamic section. The DT_DEBUG entry is filled in by the
2805 dynamic linker and used by the debugger. */
2806 #define add_dynamic_entry(TAG, VAL) \
2807 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
2811 if (!add_dynamic_entry (DT_DEBUG
, 0))
2817 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2818 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2819 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2820 || !add_dynamic_entry (DT_JMPREL
, 0))
2826 if (!add_dynamic_entry (DT_RELA
, 0)
2827 || !add_dynamic_entry (DT_RELASZ
, 0)
2828 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
2832 if ((info
->flags
& DF_TEXTREL
) != 0)
2834 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2836 info
->flags
|= DF_TEXTREL
;
2839 #undef add_dynamic_entry
2844 /* This function is called via elf_cris_link_hash_traverse if we are
2845 creating a shared object. In the -Bsymbolic case, it discards the
2846 space allocated to copy PC relative relocs against symbols which
2847 are defined in regular objects. For the normal non-symbolic case,
2848 we also discard space for relocs that have become local due to
2849 symbol visibility changes. We allocated space for them in the
2850 check_relocs routine, but we won't fill them in in the
2851 relocate_section routine. */
2854 elf_cris_discard_excess_dso_dynamics (h
, inf
)
2855 struct elf_cris_link_hash_entry
*h
;
2858 struct elf_cris_pcrel_relocs_copied
*s
;
2859 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2861 if (h
->root
.root
.type
== bfd_link_hash_warning
)
2862 h
= (struct elf_cris_link_hash_entry
*) h
->root
.root
.u
.i
.link
;
2864 /* If a symbol has been forced local or we have found a regular
2865 definition for the symbolic link case, then we won't be needing
2867 if ((h
->root
.elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
2868 && ((h
->root
.elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0
2871 for (s
= h
->pcrel_relocs_copied
; s
!= NULL
; s
= s
->next
)
2872 s
->section
->_raw_size
-= s
->count
* sizeof (Elf32_External_Rela
);
2878 /* This function is called via elf_cris_link_hash_traverse if we are *not*
2879 creating a shared object. We discard space for relocs for symbols put
2880 in the .got, but which we found we do not have to resolve at run-time. */
2883 elf_cris_discard_excess_program_dynamics (h
, inf
)
2884 struct elf_cris_link_hash_entry
*h
;
2887 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2889 if (h
->root
.root
.type
== bfd_link_hash_warning
)
2890 h
= (struct elf_cris_link_hash_entry
*) h
->root
.root
.u
.i
.link
;
2892 /* If we're not creating a shared library and have a symbol which is
2893 referred to by .got references, but the symbol is defined locally,
2894 (or rather, not not defined by a DSO) then lose the reloc for the
2895 .got (don't allocate room for it). */
2896 if ((h
->root
.elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0)
2898 if (h
->root
.got
.refcount
> 0
2899 /* The size of this section is only valid and in sync with the
2900 various reference counts if we do dynamic; don't decrement it
2902 && elf_hash_table (info
)->dynamic_sections_created
)
2904 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2907 BFD_ASSERT (dynobj
!= NULL
);
2909 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
2911 BFD_ASSERT (srelgot
!= NULL
);
2913 srelgot
->_raw_size
-= sizeof (Elf32_External_Rela
);
2916 /* If the locally-defined symbol isn't used by a DSO, then we don't
2917 have to export it as a dynamic symbol. This was already done for
2918 functions; doing this for all symbols would presumably not
2919 introduce new problems. Of course we don't do this if we're
2920 exporting all dynamic symbols. */
2921 if (! info
->export_dynamic
2922 && (h
->root
.elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) == 0)
2924 h
->root
.dynindx
= -1;
2925 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
2926 h
->root
.dynstr_index
);
2933 /* Reject a file depending on presence and expectation of prefixed
2934 underscores on symbols. */
2937 cris_elf_object_p (abfd
)
2940 if ((elf_elfheader (abfd
)->e_flags
& EF_CRIS_UNDERSCORE
))
2941 return (bfd_get_symbol_leading_char (abfd
) == '_');
2943 return (bfd_get_symbol_leading_char (abfd
) == 0);
2946 /* Mark presence or absence of leading underscore. */
2949 cris_elf_final_write_processing (abfd
, linker
)
2951 boolean linker ATTRIBUTE_UNUSED
;
2953 if (bfd_get_symbol_leading_char (abfd
) == '_')
2954 elf_elfheader (abfd
)->e_flags
|= EF_CRIS_UNDERSCORE
;
2956 elf_elfheader (abfd
)->e_flags
&= ~EF_CRIS_UNDERSCORE
;
2959 /* Display the flags field. */
2962 cris_elf_print_private_bfd_data (abfd
, ptr
)
2966 FILE *file
= (FILE *) ptr
;
2968 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
)
2970 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
2972 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
2974 if (elf_elfheader (abfd
)->e_flags
& EF_CRIS_UNDERSCORE
)
2975 fprintf (file
, _(" [symbols have a _ prefix]"));
2981 /* Don't mix files with and without a leading underscore. */
2984 cris_elf_merge_private_bfd_data (ibfd
, obfd
)
2988 flagword old_flags
, new_flags
;
2990 if (! _bfd_generic_verify_endian_match (ibfd
, obfd
))
2993 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
2994 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
2997 if (! elf_flags_init (obfd
))
2999 /* This happens when ld starts out with a 'blank' output file. */
3000 elf_flags_init (obfd
) = true;
3002 /* Set flags according to current bfd_target. */
3003 cris_elf_final_write_processing (obfd
, false);
3006 old_flags
= elf_elfheader (obfd
)->e_flags
;
3007 new_flags
= elf_elfheader (ibfd
)->e_flags
;
3009 /* Is this good or bad? We'll follow with other excluding flags. */
3010 if ((old_flags
& EF_CRIS_UNDERSCORE
) != (new_flags
& EF_CRIS_UNDERSCORE
))
3012 (*_bfd_error_handler
)
3013 ((new_flags
& EF_CRIS_UNDERSCORE
)
3014 ? _("%s: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3015 : _("%s: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3016 bfd_archive_filename (ibfd
));
3017 bfd_set_error (bfd_error_bad_value
);
3025 static enum elf_reloc_type_class
3026 elf_cris_reloc_type_class (rela
)
3027 const Elf_Internal_Rela
*rela
;
3029 switch ((int) ELF32_R_TYPE (rela
->r_info
))
3031 case R_CRIS_RELATIVE
:
3032 return reloc_class_relative
;
3033 case R_CRIS_JUMP_SLOT
:
3034 return reloc_class_plt
;
3036 return reloc_class_copy
;
3038 return reloc_class_normal
;
3042 #define ELF_ARCH bfd_arch_cris
3043 #define ELF_MACHINE_CODE EM_CRIS
3044 #define ELF_MAXPAGESIZE 0x2000
3046 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec
3047 #define TARGET_LITTLE_NAME "elf32-cris"
3048 #define elf_symbol_leading_char 0
3050 #define elf_info_to_howto_rel NULL
3051 #define elf_info_to_howto cris_info_to_howto_rela
3052 #define elf_backend_relocate_section cris_elf_relocate_section
3053 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
3054 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
3055 #define elf_backend_check_relocs cris_elf_check_relocs
3056 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
3057 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
3059 #define elf_backend_can_gc_sections 1
3060 #define elf_backend_can_refcount 1
3062 #define elf_backend_object_p cris_elf_object_p
3063 #define elf_backend_final_write_processing \
3064 cris_elf_final_write_processing
3065 #define bfd_elf32_bfd_print_private_bfd_data \
3066 cris_elf_print_private_bfd_data
3067 #define bfd_elf32_bfd_merge_private_bfd_data \
3068 cris_elf_merge_private_bfd_data
3070 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
3072 #define bfd_elf32_bfd_link_hash_table_create \
3073 elf_cris_link_hash_table_create
3074 #define elf_backend_adjust_dynamic_symbol \
3075 elf_cris_adjust_dynamic_symbol
3076 #define elf_backend_size_dynamic_sections \
3077 elf_cris_size_dynamic_sections
3078 #define elf_backend_finish_dynamic_symbol \
3079 elf_cris_finish_dynamic_symbol
3080 #define elf_backend_finish_dynamic_sections \
3081 elf_cris_finish_dynamic_sections
3082 #define elf_backend_create_dynamic_sections \
3083 _bfd_elf_create_dynamic_sections
3084 #define bfd_elf32_bfd_final_link \
3085 _bfd_elf32_gc_common_final_link
3086 #define elf_backend_hide_symbol elf_cris_hide_symbol
3087 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
3089 #define elf_backend_want_got_plt 1
3090 #define elf_backend_plt_readonly 1
3091 #define elf_backend_want_plt_sym 0
3092 #define elf_backend_got_header_size 12
3093 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
3095 /* Later, we my want to optimize RELA entries into REL entries for dynamic
3096 linking and libraries (if it's a win of any significance). Until then,
3097 take the easy route. */
3098 #define elf_backend_may_use_rel_p 0
3099 #define elf_backend_may_use_rela_p 1
3100 #define elf_backend_rela_normal 1
3102 #include "elf32-target.h"
3104 #define INCLUDED_TARGET_FILE
3106 #undef TARGET_LITTLE_SYM
3107 #undef TARGET_LITTLE_NAME
3108 #undef elf_symbol_leading_char
3110 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
3111 #define TARGET_LITTLE_NAME "elf32-us-cris"
3112 #define elf_symbol_leading_char '_'
3114 #include "elf32-target.h"