1 /* CRIS-specific support for 32-bit ELF.
2 Copyright (C) 2000-2018 Free Software Foundation, Inc.
3 Contributed by Axis Communications AB.
4 Written by Hans-Peter Nilsson, based on elf32-fr30.c
5 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
32 cris_elf_pcrel_reloc (bfd
*, arelent
*, asymbol
*, void *,
33 asection
*, bfd
*, char **);
35 cris_elf_set_mach_from_flags (bfd
*, unsigned long);
37 /* Forward declarations. */
38 static reloc_howto_type cris_elf_howto_table
[] =
40 /* This reloc does nothing. */
41 HOWTO (R_CRIS_NONE
, /* type */
43 3, /* size (0 = byte, 1 = short, 2 = long) */
45 FALSE
, /* pc_relative */
47 complain_overflow_dont
, /* complain_on_overflow */
48 bfd_elf_generic_reloc
, /* special_function */
49 "R_CRIS_NONE", /* name */
50 FALSE
, /* partial_inplace */
53 FALSE
), /* pcrel_offset */
55 /* An 8 bit absolute relocation. */
56 HOWTO (R_CRIS_8
, /* type */
58 0, /* size (0 = byte, 1 = short, 2 = long) */
60 FALSE
, /* pc_relative */
62 complain_overflow_bitfield
, /* complain_on_overflow */
63 bfd_elf_generic_reloc
, /* special_function */
64 "R_CRIS_8", /* name */
65 FALSE
, /* partial_inplace */
66 0x0000, /* src_mask */
67 0x00ff, /* dst_mask */
68 FALSE
), /* pcrel_offset */
70 /* A 16 bit absolute relocation. */
71 HOWTO (R_CRIS_16
, /* type */
73 1, /* size (0 = byte, 1 = short, 2 = long) */
75 FALSE
, /* pc_relative */
77 complain_overflow_bitfield
, /* complain_on_overflow */
78 bfd_elf_generic_reloc
, /* special_function */
79 "R_CRIS_16", /* name */
80 FALSE
, /* partial_inplace */
81 0x00000000, /* src_mask */
82 0x0000ffff, /* dst_mask */
83 FALSE
), /* pcrel_offset */
85 /* A 32 bit absolute relocation. */
86 HOWTO (R_CRIS_32
, /* type */
88 2, /* size (0 = byte, 1 = short, 2 = long) */
90 FALSE
, /* pc_relative */
92 /* We don't want overflow complaints for 64-bit vma builds
93 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
94 32-bit ELF) where sym=0xc0001234.
95 Don't do this for the PIC relocs, as we don't expect to
96 see them with large offsets. */
97 complain_overflow_dont
, /* complain_on_overflow */
98 bfd_elf_generic_reloc
, /* special_function */
99 "R_CRIS_32", /* name */
100 FALSE
, /* partial_inplace */
101 0x00000000, /* src_mask */
102 0xffffffff, /* dst_mask */
103 FALSE
), /* pcrel_offset */
105 /* An 8 bit PC-relative relocation. */
106 HOWTO (R_CRIS_8_PCREL
, /* type */
108 0, /* size (0 = byte, 1 = short, 2 = long) */
110 TRUE
, /* pc_relative */
112 complain_overflow_bitfield
, /* complain_on_overflow */
113 cris_elf_pcrel_reloc
, /* special_function */
114 "R_CRIS_8_PCREL", /* name */
115 FALSE
, /* partial_inplace */
116 0x0000, /* src_mask */
117 0x00ff, /* dst_mask */
118 TRUE
), /* pcrel_offset */
120 /* A 16 bit PC-relative relocation. */
121 HOWTO (R_CRIS_16_PCREL
, /* type */
123 1, /* size (0 = byte, 1 = short, 2 = long) */
125 TRUE
, /* pc_relative */
127 complain_overflow_bitfield
, /* complain_on_overflow */
128 cris_elf_pcrel_reloc
, /* special_function */
129 "R_CRIS_16_PCREL", /* name */
130 FALSE
, /* partial_inplace */
131 0x00000000, /* src_mask */
132 0x0000ffff, /* dst_mask */
133 TRUE
), /* pcrel_offset */
135 /* A 32 bit PC-relative relocation. */
136 HOWTO (R_CRIS_32_PCREL
, /* type */
138 2, /* size (0 = byte, 1 = short, 2 = long) */
140 TRUE
, /* pc_relative */
142 complain_overflow_bitfield
, /* complain_on_overflow */
143 cris_elf_pcrel_reloc
, /* special_function */
144 "R_CRIS_32_PCREL", /* name */
145 FALSE
, /* partial_inplace */
146 0x00000000, /* src_mask */
147 0xffffffff, /* dst_mask */
148 TRUE
), /* pcrel_offset */
150 /* GNU extension to record C++ vtable hierarchy. */
151 HOWTO (R_CRIS_GNU_VTINHERIT
, /* type */
153 2, /* size (0 = byte, 1 = short, 2 = long) */
155 FALSE
, /* pc_relative */
157 complain_overflow_dont
, /* complain_on_overflow */
158 NULL
, /* special_function */
159 "R_CRIS_GNU_VTINHERIT", /* name */
160 FALSE
, /* partial_inplace */
163 FALSE
), /* pcrel_offset */
165 /* GNU extension to record C++ vtable member usage. */
166 HOWTO (R_CRIS_GNU_VTENTRY
, /* type */
168 2, /* size (0 = byte, 1 = short, 2 = long) */
170 FALSE
, /* pc_relative */
172 complain_overflow_dont
, /* complain_on_overflow */
173 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
174 "R_CRIS_GNU_VTENTRY", /* name */
175 FALSE
, /* partial_inplace */
178 FALSE
), /* pcrel_offset */
180 /* This is used only by the dynamic linker. The symbol should exist
181 both in the object being run and in some shared library. The
182 dynamic linker copies the data addressed by the symbol from the
183 shared library into the object, because the object being
184 run has to have the data at some particular address. */
185 HOWTO (R_CRIS_COPY
, /* type */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
189 FALSE
, /* pc_relative */
191 complain_overflow_bitfield
, /* complain_on_overflow */
192 bfd_elf_generic_reloc
, /* special_function */
193 "R_CRIS_COPY", /* name */
194 FALSE
, /* partial_inplace */
197 FALSE
), /* pcrel_offset */
199 /* Like R_CRIS_32, but used when setting global offset table entries. */
200 HOWTO (R_CRIS_GLOB_DAT
, /* type */
202 2, /* size (0 = byte, 1 = short, 2 = long) */
204 FALSE
, /* pc_relative */
206 complain_overflow_bitfield
, /* complain_on_overflow */
207 bfd_elf_generic_reloc
, /* special_function */
208 "R_CRIS_GLOB_DAT", /* name */
209 FALSE
, /* partial_inplace */
211 0xffffffff, /* dst_mask */
212 FALSE
), /* pcrel_offset */
214 /* Marks a procedure linkage table entry for a symbol. */
215 HOWTO (R_CRIS_JUMP_SLOT
, /* type */
217 2, /* size (0 = byte, 1 = short, 2 = long) */
219 FALSE
, /* pc_relative */
221 complain_overflow_bitfield
, /* complain_on_overflow */
222 bfd_elf_generic_reloc
, /* special_function */
223 "R_CRIS_JUMP_SLOT", /* name */
224 FALSE
, /* partial_inplace */
227 FALSE
), /* pcrel_offset */
229 /* Used only by the dynamic linker. When the object is run, this
230 longword is set to the load address of the object, plus the
232 HOWTO (R_CRIS_RELATIVE
, /* type */
234 2, /* size (0 = byte, 1 = short, 2 = long) */
236 FALSE
, /* pc_relative */
238 complain_overflow_bitfield
, /* complain_on_overflow */
239 bfd_elf_generic_reloc
, /* special_function */
240 "R_CRIS_RELATIVE", /* name */
241 FALSE
, /* partial_inplace */
243 0xffffffff, /* dst_mask */
244 FALSE
), /* pcrel_offset */
246 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
247 HOWTO (R_CRIS_16_GOT
, /* type */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
251 FALSE
, /* pc_relative */
253 complain_overflow_bitfield
, /* complain_on_overflow */
254 bfd_elf_generic_reloc
, /* special_function */
255 "R_CRIS_16_GOT", /* name */
256 FALSE
, /* partial_inplace */
258 0xffff, /* dst_mask */
259 FALSE
), /* pcrel_offset */
261 HOWTO (R_CRIS_32_GOT
, /* type */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
265 FALSE
, /* pc_relative */
267 complain_overflow_bitfield
, /* complain_on_overflow */
268 bfd_elf_generic_reloc
, /* special_function */
269 "R_CRIS_32_GOT", /* name */
270 FALSE
, /* partial_inplace */
272 0xffffffff, /* dst_mask */
273 FALSE
), /* pcrel_offset */
275 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
276 the GOT table for the symbol. */
277 HOWTO (R_CRIS_16_GOTPLT
, /* type */
279 1, /* size (0 = byte, 1 = short, 2 = long) */
281 FALSE
, /* pc_relative */
283 complain_overflow_bitfield
, /* complain_on_overflow */
284 bfd_elf_generic_reloc
, /* special_function */
285 "R_CRIS_16_GOTPLT", /* name */
286 FALSE
, /* partial_inplace */
288 0xffff, /* dst_mask */
289 FALSE
), /* pcrel_offset */
291 HOWTO (R_CRIS_32_GOTPLT
, /* type */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
295 FALSE
, /* pc_relative */
297 complain_overflow_bitfield
, /* complain_on_overflow */
298 bfd_elf_generic_reloc
, /* special_function */
299 "R_CRIS_32_GOTPLT", /* name */
300 FALSE
, /* partial_inplace */
302 0xffffffff, /* dst_mask */
303 FALSE
), /* pcrel_offset */
305 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
307 HOWTO (R_CRIS_32_GOTREL
, /* type */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
311 FALSE
, /* pc_relative */
313 complain_overflow_bitfield
, /* complain_on_overflow */
314 bfd_elf_generic_reloc
, /* special_function */
315 "R_CRIS_32_GOTREL", /* name */
316 FALSE
, /* partial_inplace */
318 0xffffffff, /* dst_mask */
319 FALSE
), /* pcrel_offset */
321 /* A 32-bit offset from GOT to entry for this symbol in PLT and request
322 to create PLT entry for symbol. */
323 HOWTO (R_CRIS_32_PLT_GOTREL
, /* type */
325 2, /* size (0 = byte, 1 = short, 2 = long) */
327 FALSE
, /* pc_relative */
329 complain_overflow_bitfield
, /* complain_on_overflow */
330 bfd_elf_generic_reloc
, /* special_function */
331 "R_CRIS_32_PLT_GOTREL", /* name */
332 FALSE
, /* partial_inplace */
334 0xffffffff, /* dst_mask */
335 FALSE
), /* pcrel_offset */
337 /* A 32-bit offset from PC (location after the relocation) + addend to
338 entry for this symbol in PLT and request to create PLT entry for
340 HOWTO (R_CRIS_32_PLT_PCREL
, /* type */
342 2, /* size (0 = byte, 1 = short, 2 = long) */
344 TRUE
, /* pc_relative */
346 complain_overflow_bitfield
, /* complain_on_overflow */
347 cris_elf_pcrel_reloc
, /* special_function */
348 "R_CRIS_32_PLT_PCREL", /* name */
349 FALSE
, /* partial_inplace */
351 0xffffffff, /* dst_mask */
352 TRUE
), /* pcrel_offset */
354 /* We don't handle these in any special manner and cross-format
355 linking is not supported; just recognize them enough to pass them
356 around. FIXME: do the same for most PIC relocs and add sanity
357 tests to actually refuse gracefully to handle these and PIC
358 relocs for cross-format linking. */
359 #define TLSHOWTO32(name) \
360 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
361 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
362 #define TLSHOWTO16X(name, X) \
363 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
364 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
365 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
366 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
368 TLSHOWTO32 (R_CRIS_32_GOT_GD
),
369 TLSHOWTO16 (R_CRIS_16_GOT_GD
),
370 TLSHOWTO32 (R_CRIS_32_GD
),
371 TLSHOWTO32 (R_CRIS_DTP
),
372 TLSHOWTO32 (R_CRIS_32_DTPREL
),
373 TLSHOWTO16S (R_CRIS_16_DTPREL
),
374 TLSHOWTO32 (R_CRIS_32_GOT_TPREL
),
375 TLSHOWTO16S (R_CRIS_16_GOT_TPREL
),
376 TLSHOWTO32 (R_CRIS_32_TPREL
),
377 TLSHOWTO16S (R_CRIS_16_TPREL
),
378 TLSHOWTO32 (R_CRIS_DTPMOD
),
379 TLSHOWTO32 (R_CRIS_32_IE
)
382 /* Map BFD reloc types to CRIS ELF reloc types. */
384 struct cris_reloc_map
386 bfd_reloc_code_real_type bfd_reloc_val
;
387 unsigned int cris_reloc_val
;
390 static const struct cris_reloc_map cris_reloc_map
[] =
392 { BFD_RELOC_NONE
, R_CRIS_NONE
},
393 { BFD_RELOC_8
, R_CRIS_8
},
394 { BFD_RELOC_16
, R_CRIS_16
},
395 { BFD_RELOC_32
, R_CRIS_32
},
396 { BFD_RELOC_8_PCREL
, R_CRIS_8_PCREL
},
397 { BFD_RELOC_16_PCREL
, R_CRIS_16_PCREL
},
398 { BFD_RELOC_32_PCREL
, R_CRIS_32_PCREL
},
399 { BFD_RELOC_VTABLE_INHERIT
, R_CRIS_GNU_VTINHERIT
},
400 { BFD_RELOC_VTABLE_ENTRY
, R_CRIS_GNU_VTENTRY
},
401 { BFD_RELOC_CRIS_COPY
, R_CRIS_COPY
},
402 { BFD_RELOC_CRIS_GLOB_DAT
, R_CRIS_GLOB_DAT
},
403 { BFD_RELOC_CRIS_JUMP_SLOT
, R_CRIS_JUMP_SLOT
},
404 { BFD_RELOC_CRIS_RELATIVE
, R_CRIS_RELATIVE
},
405 { BFD_RELOC_CRIS_16_GOT
, R_CRIS_16_GOT
},
406 { BFD_RELOC_CRIS_32_GOT
, R_CRIS_32_GOT
},
407 { BFD_RELOC_CRIS_16_GOTPLT
, R_CRIS_16_GOTPLT
},
408 { BFD_RELOC_CRIS_32_GOTPLT
, R_CRIS_32_GOTPLT
},
409 { BFD_RELOC_CRIS_32_GOTREL
, R_CRIS_32_GOTREL
},
410 { BFD_RELOC_CRIS_32_PLT_GOTREL
, R_CRIS_32_PLT_GOTREL
},
411 { BFD_RELOC_CRIS_32_PLT_PCREL
, R_CRIS_32_PLT_PCREL
},
412 { BFD_RELOC_CRIS_32_GOT_GD
, R_CRIS_32_GOT_GD
},
413 { BFD_RELOC_CRIS_16_GOT_GD
, R_CRIS_16_GOT_GD
},
414 { BFD_RELOC_CRIS_32_GD
, R_CRIS_32_GD
},
415 { BFD_RELOC_CRIS_DTP
, R_CRIS_DTP
},
416 { BFD_RELOC_CRIS_32_DTPREL
, R_CRIS_32_DTPREL
},
417 { BFD_RELOC_CRIS_16_DTPREL
, R_CRIS_16_DTPREL
},
418 { BFD_RELOC_CRIS_32_GOT_TPREL
, R_CRIS_32_GOT_TPREL
},
419 { BFD_RELOC_CRIS_16_GOT_TPREL
, R_CRIS_16_GOT_TPREL
},
420 { BFD_RELOC_CRIS_32_TPREL
, R_CRIS_32_TPREL
},
421 { BFD_RELOC_CRIS_16_TPREL
, R_CRIS_16_TPREL
},
422 { BFD_RELOC_CRIS_DTPMOD
, R_CRIS_DTPMOD
},
423 { BFD_RELOC_CRIS_32_IE
, R_CRIS_32_IE
}
426 static reloc_howto_type
*
427 cris_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
428 bfd_reloc_code_real_type code
)
432 for (i
= 0; i
< sizeof (cris_reloc_map
) / sizeof (cris_reloc_map
[0]); i
++)
433 if (cris_reloc_map
[i
].bfd_reloc_val
== code
)
434 return & cris_elf_howto_table
[cris_reloc_map
[i
].cris_reloc_val
];
439 static reloc_howto_type
*
440 cris_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
, const char *r_name
)
445 i
< sizeof (cris_elf_howto_table
) / sizeof (cris_elf_howto_table
[0]);
447 if (cris_elf_howto_table
[i
].name
!= NULL
448 && strcasecmp (cris_elf_howto_table
[i
].name
, r_name
) == 0)
449 return &cris_elf_howto_table
[i
];
454 /* Set the howto pointer for an CRIS ELF reloc. */
457 cris_info_to_howto_rela (bfd
* abfd ATTRIBUTE_UNUSED
,
459 Elf_Internal_Rela
* dst
)
461 enum elf_cris_reloc_type r_type
;
463 r_type
= ELF32_R_TYPE (dst
->r_info
);
464 if (r_type
>= R_CRIS_max
)
466 /* xgettext:c-format */
467 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
471 cache_ptr
->howto
= & cris_elf_howto_table
[r_type
];
474 bfd_reloc_status_type
475 cris_elf_pcrel_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
476 arelent
*reloc_entry
,
478 void * data ATTRIBUTE_UNUSED
,
479 asection
*input_section
,
481 char **error_message ATTRIBUTE_UNUSED
)
483 /* By default (using only bfd_elf_generic_reloc when linking to
484 non-ELF formats) PC-relative relocs are relative to the beginning
485 of the reloc. CRIS PC-relative relocs are relative to the position
486 *after* the reloc because that's what pre-CRISv32 PC points to
487 after reading an insn field with that reloc. (For CRISv32, PC is
488 actually relative to the start of the insn, but we keep the old
489 definition.) Still, we use as much generic machinery as we can.
491 Only adjust when doing a final link. */
492 if (output_bfd
== (bfd
*) NULL
)
493 reloc_entry
->addend
-= 1 << reloc_entry
->howto
->size
;
496 bfd_elf_generic_reloc (abfd
, reloc_entry
, symbol
, data
,
497 input_section
, output_bfd
, error_message
);
500 /* Support for core dump NOTE sections.
501 The slightly unintuitive code layout is an attempt to keep at least
502 some similarities with other ports, hoping to simplify general
503 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
506 cris_elf_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
511 if (bfd_get_mach (abfd
) == bfd_mach_cris_v32
)
512 switch (note
->descsz
)
517 case 202: /* Linux/CRISv32 */
519 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
522 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 22);
531 switch (note
->descsz
)
536 case 214: /* Linux/CRIS */
538 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
541 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 22);
550 /* Make a ".reg/999" section. */
551 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
552 size
, note
->descpos
+ offset
);
556 cris_elf_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
558 if (bfd_get_mach (abfd
) == bfd_mach_cris_v32
)
559 switch (note
->descsz
)
564 case 124: /* Linux/CRISv32 elf_prpsinfo */
565 elf_tdata (abfd
)->core
->program
566 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
567 elf_tdata (abfd
)->core
->command
568 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
571 switch (note
->descsz
)
576 case 124: /* Linux/CRIS elf_prpsinfo */
577 elf_tdata (abfd
)->core
->program
578 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
579 elf_tdata (abfd
)->core
->command
580 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
583 /* Note that for some reason, a spurious space is tacked
584 onto the end of the args in some (at least one anyway)
585 implementations, so strip it off if it exists. */
588 char *command
= elf_tdata (abfd
)->core
->command
;
589 int n
= strlen (command
);
591 if (0 < n
&& command
[n
- 1] == ' ')
592 command
[n
- 1] = '\0';
598 /* The name of the dynamic interpreter. This is put in the .interp
601 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
603 /* The size in bytes of an entry in the procedure linkage table. */
605 #define PLT_ENTRY_SIZE 20
606 #define PLT_ENTRY_SIZE_V32 26
608 /* The first entry in an absolute procedure linkage table looks like this. */
610 static const bfd_byte elf_cris_plt0_entry
[PLT_ENTRY_SIZE
] =
613 0x7e, 0x7e, /* push mof. */
614 0x7f, 0x0d, /* (dip [pc+]) */
615 0, 0, 0, 0, /* Replaced with address of .got + 4. */
616 0x30, 0x7a, /* move [...],mof */
617 0x7f, 0x0d, /* (dip [pc+]) */
618 0, 0, 0, 0, /* Replaced with address of .got + 8. */
619 0x30, 0x09 /* jump [...] */
622 static const bfd_byte elf_cris_plt0_entry_v32
[PLT_ENTRY_SIZE_V32
] =
624 0x84, 0xe2, /* subq 4,$sp */
625 0x6f, 0xfe, /* move.d 0,$acr */
626 0, 0, 0, 0, /* Replaced by address of .got + 4. */
627 0x7e, 0x7a, /* move $mof,[$sp] */
628 0x3f, 0x7a, /* move [$acr],$mof */
629 0x04, 0xf2, /* addq 4,acr */
630 0x6f, 0xfa, /* move.d [$acr],$acr */
631 0xbf, 0x09, /* jump $acr */
632 0xb0, 0x05, /* nop */
633 0, 0 /* Pad out to 26 bytes. */
636 /* Subsequent entries in an absolute procedure linkage table look like
639 static const bfd_byte elf_cris_plt_entry
[PLT_ENTRY_SIZE
] =
641 0x7f, 0x0d, /* (dip [pc+]) */
642 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
643 0x30, 0x09, /* jump [...] */
644 0x3f, 0x7e, /* move [pc+],mof */
645 0, 0, 0, 0, /* Replaced with offset into relocation table. */
646 0x2f, 0xfe, /* add.d [pc+],pc */
648 0xff, 0xff /* Replaced with offset to start of .plt. */
651 static const bfd_byte elf_cris_plt_entry_v32
[PLT_ENTRY_SIZE_V32
] =
653 0x6f, 0xfe, /* move.d 0,$acr */
654 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
655 0x6f, 0xfa, /* move.d [$acr],$acr */
656 0xbf, 0x09, /* jump $acr */
657 0xb0, 0x05, /* nop */
658 0x3f, 0x7e, /* move 0,mof */
659 0, 0, 0, 0, /* Replaced with offset into relocation table. */
660 0xbf, 0x0e, /* ba start_of_plt0_entry */
661 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
665 /* The first entry in a PIC procedure linkage table looks like this. */
667 static const bfd_byte elf_cris_pic_plt0_entry
[PLT_ENTRY_SIZE
] =
669 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
670 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
671 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
672 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
675 static const bfd_byte elf_cris_pic_plt0_entry_v32
[PLT_ENTRY_SIZE_V32
] =
677 0x84, 0xe2, /* subq 4,$sp */
678 0x04, 0x01, /* addoq 4,$r0,$acr */
679 0x7e, 0x7a, /* move $mof,[$sp] */
680 0x3f, 0x7a, /* move [$acr],$mof */
681 0x04, 0xf2, /* addq 4,$acr */
682 0x6f, 0xfa, /* move.d [$acr],$acr */
683 0xbf, 0x09, /* jump $acr */
684 0xb0, 0x05, /* nop */
685 0, 0, /* Pad out to 26 bytes. */
690 /* Subsequent entries in a PIC procedure linkage table look like this. */
692 static const bfd_byte elf_cris_pic_plt_entry
[PLT_ENTRY_SIZE
] =
694 0x6f, 0x0d, /* (bdap [pc+].d,r0) */
695 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
696 0x30, 0x09, /* jump [...] */
697 0x3f, 0x7e, /* move [pc+],mof */
698 0, 0, 0, 0, /* Replaced with offset into relocation table. */
699 0x2f, 0xfe, /* add.d [pc+],pc */
700 0xec, 0xff, /* Replaced with offset to start of .plt. */
704 static const bfd_byte elf_cris_pic_plt_entry_v32
[PLT_ENTRY_SIZE_V32
] =
706 0x6f, 0x0d, /* addo.d 0,$r0,$acr */
707 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
708 0x6f, 0xfa, /* move.d [$acr],$acr */
709 0xbf, 0x09, /* jump $acr */
710 0xb0, 0x05, /* nop */
711 0x3f, 0x7e, /* move relocoffs,$mof */
712 0, 0, 0, 0, /* Replaced with offset into relocation table. */
713 0xbf, 0x0e, /* ba start_of_plt */
714 0, 0, 0, 0, /* Replaced with offset to start of .plt. */
718 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
719 (and most other PIC/shlib stuff). Check that we don't drift away
722 The CRIS linker, like the m68k and i386 linkers (and probably the rest
723 too) needs to keep track of the number of relocs that it decides to
724 copy in check_relocs for each symbol. This is so that it can discard
725 PC relative relocs if it doesn't need them when linking with
726 -Bsymbolic. We store the information in a field extending the regular
727 ELF linker hash table. */
729 /* This structure keeps track of the number of PC relative relocs we have
730 copied for a given symbol. */
732 struct elf_cris_pcrel_relocs_copied
735 struct elf_cris_pcrel_relocs_copied
*next
;
737 /* A section in dynobj. */
740 /* Number of relocs copied in this section. */
743 /* Example of reloc being copied, for message. */
744 enum elf_cris_reloc_type r_type
;
747 /* CRIS ELF linker hash entry. */
749 struct elf_cris_link_hash_entry
751 struct elf_link_hash_entry root
;
753 /* Number of PC relative relocs copied for this symbol. */
754 struct elf_cris_pcrel_relocs_copied
*pcrel_relocs_copied
;
756 /* The GOTPLT references are CRIS-specific; the goal is to avoid having
757 both a general GOT and a PLT-specific GOT entry for the same symbol,
758 when it is referenced both as a function and as a function pointer.
760 Number of GOTPLT references for a function. */
761 bfd_signed_vma gotplt_refcount
;
763 /* Actual GOTPLT index for this symbol, if applicable, or zero if not
764 (zero is never used as an index). FIXME: We should be able to fold
765 this with gotplt_refcount in a union, like the got and plt unions in
766 elf_link_hash_entry. */
767 bfd_size_type gotplt_offset
;
769 /* The root.got.refcount is the sum of the regular reference counts
770 (this) and those members below. We have to keep a separate count
771 to track when we've found the first (or last) reference to a
772 regular got entry. The offset is in root.got.offset. */
773 bfd_signed_vma reg_got_refcount
;
775 /* Similar to the above, the number of reloc references to this
776 symbols that need a R_CRIS_32_TPREL slot. The offset is in
777 root.got.offset, because this and .dtp_refcount can't validly
778 happen when there's also a regular GOT entry; that's invalid
779 input for which an error is emitted. */
780 bfd_signed_vma tprel_refcount
;
782 /* Similar to the above, the number of reloc references to this
783 symbols that need a R_CRIS_DTP slot. The offset is in
784 root.got.offset; plus 4 if .tprel_refcount > 0. */
785 bfd_signed_vma dtp_refcount
;
789 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry
*,
792 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry
*,
795 /* The local_got_refcounts and local_got_offsets are a multiple of
796 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
797 refcount for GOT itself, see code), with the summary / group offset
798 for local symbols located at offset N, reference counts for
799 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
800 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
803 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
804 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
805 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
806 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
808 /* CRIS ELF linker hash table. */
810 struct elf_cris_link_hash_table
812 struct elf_link_hash_table root
;
814 /* We can't use the PLT offset and calculate to get the GOTPLT offset,
815 since we try and avoid creating GOTPLT:s when there's already a GOT.
816 Instead, we keep and update the next available index here. */
817 bfd_size_type next_gotplt_entry
;
819 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
820 been seen for any input; if != 0, then the constant-offset
821 R_CRIS_DTPMOD is needed for this DSO/executable. This turns
822 negative at relocation, so that we don't need an extra flag for
823 when the reloc is output. */
824 bfd_signed_vma dtpmod_refcount
;
827 /* Traverse a CRIS ELF linker hash table. */
829 #define elf_cris_link_hash_traverse(table, func, info) \
830 (elf_link_hash_traverse \
832 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
835 /* Get the CRIS ELF linker hash table from a link_info structure. */
837 #define elf_cris_hash_table(p) \
838 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
839 == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
841 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
842 "parent class"). The .root reference is just a simple type
843 check on the argument. */
845 #define elf_cris_hash_entry(p) \
846 ((struct elf_cris_link_hash_entry *) (&(p)->root))
848 /* Create an entry in a CRIS ELF linker hash table. */
850 static struct bfd_hash_entry
*
851 elf_cris_link_hash_newfunc (struct bfd_hash_entry
*entry
,
852 struct bfd_hash_table
*table
,
855 struct elf_cris_link_hash_entry
*ret
=
856 (struct elf_cris_link_hash_entry
*) entry
;
858 /* Allocate the structure if it has not already been allocated by a
860 if (ret
== (struct elf_cris_link_hash_entry
*) NULL
)
861 ret
= ((struct elf_cris_link_hash_entry
*)
862 bfd_hash_allocate (table
,
863 sizeof (struct elf_cris_link_hash_entry
)));
864 if (ret
== (struct elf_cris_link_hash_entry
*) NULL
)
865 return (struct bfd_hash_entry
*) ret
;
867 /* Call the allocation method of the superclass. */
868 ret
= ((struct elf_cris_link_hash_entry
*)
869 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
871 if (ret
!= (struct elf_cris_link_hash_entry
*) NULL
)
873 ret
->pcrel_relocs_copied
= NULL
;
874 ret
->gotplt_refcount
= 0;
875 ret
->gotplt_offset
= 0;
876 ret
->dtp_refcount
= 0;
877 ret
->tprel_refcount
= 0;
878 ret
->reg_got_refcount
= 0;
881 return (struct bfd_hash_entry
*) ret
;
884 /* Create a CRIS ELF linker hash table. */
886 static struct bfd_link_hash_table
*
887 elf_cris_link_hash_table_create (bfd
*abfd
)
889 struct elf_cris_link_hash_table
*ret
;
890 bfd_size_type amt
= sizeof (struct elf_cris_link_hash_table
);
892 ret
= ((struct elf_cris_link_hash_table
*) bfd_zmalloc (amt
));
893 if (ret
== (struct elf_cris_link_hash_table
*) NULL
)
896 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
897 elf_cris_link_hash_newfunc
,
898 sizeof (struct elf_cris_link_hash_entry
),
905 /* Initialize to skip over the first three entries in the gotplt; they
906 are used for run-time symbol evaluation. */
907 ret
->next_gotplt_entry
= 12;
909 return &ret
->root
.root
;
912 /* Perform a single relocation. By default we use the standard BFD
913 routines, with a few tweaks. */
915 static bfd_reloc_status_type
916 cris_final_link_relocate (reloc_howto_type
* howto
,
918 asection
* input_section
,
920 Elf_Internal_Rela
* rel
,
923 bfd_reloc_status_type r
;
924 enum elf_cris_reloc_type r_type
= ELF32_R_TYPE (rel
->r_info
);
926 /* PC-relative relocations are relative to the position *after*
927 the reloc. Note that for R_CRIS_8_PCREL the adjustment is
928 not a single byte, since PC must be 16-bit-aligned. */
931 /* Check that the 16-bit GOT relocs are positive. */
932 case R_CRIS_16_GOTPLT
:
934 if ((bfd_signed_vma
) relocation
< 0)
935 return bfd_reloc_overflow
;
938 case R_CRIS_32_PLT_PCREL
:
939 case R_CRIS_32_PCREL
:
943 case R_CRIS_16_PCREL
:
951 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
952 contents
, rel
->r_offset
,
953 relocation
, rel
->r_addend
);
958 /* The number of errors left before we stop outputting reloc-specific
959 explanatory messages. By coincidence, this works nicely together
960 with the default number of messages you'll get from LD about
961 "relocation truncated to fit" messages before you get an
962 "additional relocation overflows omitted from the output". */
963 static int additional_relocation_error_msg_count
= 10;
965 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
966 copied, for further comments. */
969 cris_elf_relocate_section (bfd
*output_bfd ATTRIBUTE_UNUSED
,
970 struct bfd_link_info
*info
,
972 asection
*input_section
,
974 Elf_Internal_Rela
*relocs
,
975 Elf_Internal_Sym
*local_syms
,
976 asection
**local_sections
)
978 struct elf_cris_link_hash_table
* htab
;
980 Elf_Internal_Shdr
*symtab_hdr
;
981 struct elf_link_hash_entry
**sym_hashes
;
982 bfd_vma
*local_got_offsets
;
986 Elf_Internal_Rela
*rel
;
987 Elf_Internal_Rela
*relend
;
990 htab
= elf_cris_hash_table (info
);
994 dynobj
= htab
->root
.dynobj
;
995 local_got_offsets
= elf_local_got_offsets (input_bfd
);
996 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
997 sym_hashes
= elf_sym_hashes (input_bfd
);
998 relend
= relocs
+ input_section
->reloc_count
;
1007 splt
= htab
->root
.splt
;
1008 sgot
= htab
->root
.sgot
;
1011 for (rel
= relocs
; rel
< relend
; rel
++)
1013 reloc_howto_type
*howto
;
1014 unsigned long r_symndx
;
1015 Elf_Internal_Sym
*sym
;
1017 struct elf_link_hash_entry
*h
;
1019 bfd_reloc_status_type r
;
1020 const char *symname
= NULL
;
1021 enum elf_cris_reloc_type r_type
;
1022 bfd_boolean resolved_to_zero
;
1024 r_type
= ELF32_R_TYPE (rel
->r_info
);
1026 if ( r_type
== R_CRIS_GNU_VTINHERIT
1027 || r_type
== R_CRIS_GNU_VTENTRY
)
1030 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1031 howto
= cris_elf_howto_table
+ r_type
;
1036 if (r_symndx
< symtab_hdr
->sh_info
)
1038 sym
= local_syms
+ r_symndx
;
1039 sec
= local_sections
[r_symndx
];
1040 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1042 symname
= (bfd_elf_string_from_elf_section
1043 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
1044 if (symname
== NULL
)
1045 symname
= bfd_section_name (input_bfd
, sec
);
1049 bfd_boolean warned
, ignored
;
1050 bfd_boolean unresolved_reloc
;
1052 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1053 r_symndx
, symtab_hdr
, sym_hashes
,
1055 unresolved_reloc
, warned
, ignored
);
1057 symname
= h
->root
.root
.string
;
1059 if (unresolved_reloc
1060 /* Perhaps we should detect the cases that
1061 sec->output_section is expected to be NULL like i386 and
1062 m68k, but apparently (and according to elfxx-ia64.c) all
1063 valid cases are where the symbol is defined in a shared
1064 object which we link dynamically against. This includes
1065 PLT relocs for which we've created a PLT entry and other
1066 relocs for which we're prepared to create dynamic
1069 For now, new situations cause us to just err when
1070 sec->output_offset is NULL but the object with the symbol
1071 is *not* dynamically linked against. Thus this will
1072 automatically remind us so we can see if there are other
1073 valid cases we need to revisit. */
1074 && (sec
->owner
->flags
& DYNAMIC
) != 0)
1077 else if (h
->root
.type
== bfd_link_hash_defined
1078 || h
->root
.type
== bfd_link_hash_defweak
)
1080 /* Here follow the cases where the relocation value must
1081 be zero (or when further handling is simplified when
1082 zero). I can't claim to understand the various
1083 conditions and they weren't described in the files
1084 where I copied them from (elf32-m68k.c and
1085 elf32-i386.c), but let's mention examples of where
1086 they happen. FIXME: Perhaps define and use a
1087 dynamic_symbol_p function like ia64.
1089 - When creating a shared library, we can have an
1090 ordinary relocation for a symbol defined in a shared
1091 library (perhaps the one we create). We then make
1092 the relocation value zero, as the value seen now will
1093 be added into the relocation addend in this shared
1094 library, but must be handled only at dynamic-link
1095 time. FIXME: Not sure this example covers the
1096 h->elf_link_hash_flags test, though it's there in
1098 if (bfd_link_pic (info
)
1099 && ((!SYMBOLIC_BIND (info
, h
) && h
->dynindx
!= -1)
1101 && (input_section
->flags
& SEC_ALLOC
) != 0
1102 && (r_type
== R_CRIS_8
1103 || r_type
== R_CRIS_16
1104 || r_type
== R_CRIS_32
1105 || r_type
== R_CRIS_8_PCREL
1106 || r_type
== R_CRIS_16_PCREL
1107 || r_type
== R_CRIS_32_PCREL
))
1109 else if (!bfd_link_relocatable (info
) && unresolved_reloc
1110 && (_bfd_elf_section_offset (output_bfd
, info
,
1116 /* xgettext:c-format */
1117 (_("%pB, section %pA: unresolvable relocation %s against symbol `%s'"),
1120 cris_elf_howto_table
[r_type
].name
,
1122 bfd_set_error (bfd_error_bad_value
);
1128 if (sec
!= NULL
&& discarded_section (sec
))
1129 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1130 rel
, 1, relend
, howto
, 0, contents
);
1132 if (bfd_link_relocatable (info
))
1135 resolved_to_zero
= (h
!= NULL
1136 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
1140 case R_CRIS_16_GOTPLT
:
1141 case R_CRIS_32_GOTPLT
:
1142 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1143 but we require a PLT, and the PLT handling will take care of
1144 filling in the PLT-specific GOT entry. For the GOT offset,
1145 calculate it as we do when filling it in for the .got.plt
1146 section. If we don't have a PLT, punt to GOT handling. */
1148 && ((struct elf_cris_link_hash_entry
*) h
)->gotplt_offset
!= 0)
1150 asection
*sgotplt
= htab
->root
.sgotplt
;
1153 BFD_ASSERT (h
->dynindx
!= -1);
1154 BFD_ASSERT (sgotplt
!= NULL
);
1157 = ((struct elf_cris_link_hash_entry
*) h
)->gotplt_offset
;
1159 relocation
= got_offset
;
1163 /* We didn't make a PLT entry for this symbol. Maybe everything is
1164 folded into the GOT. Other than folding, this happens when
1165 statically linking PIC code, or when using -Bsymbolic. Check
1166 that we instead have a GOT entry as done for us by
1167 elf_cris_adjust_dynamic_symbol, and drop through into the
1168 ordinary GOT cases. This must not happen for the
1169 executable, because any reference it does to a function
1170 that is satisfied by a DSO must generate a PLT. We assume
1171 these call-specific relocs don't address non-functions. */
1173 && (h
->got
.offset
== (bfd_vma
) -1
1174 || (!bfd_link_pic (info
)
1177 && h
->root
.type
== bfd_link_hash_undefweak
)))))
1180 ((h
->got
.offset
== (bfd_vma
) -1)
1181 /* xgettext:c-format */
1182 ? _("%pB, section %pA: No PLT nor GOT for relocation %s"
1183 " against symbol `%s'")
1184 /* xgettext:c-format */
1185 : _("%pB, section %pA: No PLT for relocation %s"
1186 " against symbol `%s'"),
1189 cris_elf_howto_table
[r_type
].name
,
1190 (symname
!= NULL
&& symname
[0] != '\0'
1191 ? symname
: _("[whose name is lost]")));
1193 /* FIXME: Perhaps blaming input is not the right thing to
1194 do; this is probably an internal error. But it is true
1195 that we didn't like that particular input. */
1196 bfd_set_error (bfd_error_bad_value
);
1201 /* The size of the actual relocation is not used here; we only
1202 fill in the GOT table here. */
1208 /* Note that despite using RELA relocations, the .got contents
1209 is always filled in with the link-relative relocation
1210 value; the addend. */
1214 off
= h
->got
.offset
;
1215 BFD_ASSERT (off
!= (bfd_vma
) -1);
1217 if (!elf_hash_table (info
)->dynamic_sections_created
1218 || (! bfd_link_pic (info
)
1220 || h
->type
== STT_FUNC
1222 || (bfd_link_pic (info
)
1223 && (SYMBOLIC_BIND (info
, h
) || h
->dynindx
== -1)
1226 /* This wasn't checked above for ! bfd_link_pic (info), but
1227 must hold there if we get here; the symbol must
1228 be defined in the regular program or be undefweak
1229 or be a function or otherwise need a PLT. */
1230 BFD_ASSERT (!elf_hash_table (info
)->dynamic_sections_created
1231 || bfd_link_pic (info
)
1233 || h
->type
== STT_FUNC
1235 || h
->root
.type
== bfd_link_hash_undefweak
);
1237 /* This is actually a static link, or it is a
1238 -Bsymbolic link and the symbol is defined locally,
1239 or is undefweak, or the symbol was forced to be
1240 local because of a version file, or we're not
1241 creating a dynamic object. We must initialize this
1242 entry in the global offset table. Since the offset
1243 must always be a multiple of 4, we use the least
1244 significant bit to record whether we have
1245 initialized it already.
1247 If this GOT entry should be runtime-initialized, we
1248 will create a .rela.got relocation entry to
1249 initialize the value. This is done in the
1250 finish_dynamic_symbol routine. */
1255 bfd_put_32 (output_bfd
, relocation
,
1256 sgot
->contents
+ off
);
1263 BFD_ASSERT (local_got_offsets
!= NULL
1264 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
1266 off
= local_got_offsets
[r_symndx
];
1268 /* The offset must always be a multiple of 4. We use
1269 the least significant bit to record whether we have
1270 already generated the necessary reloc. */
1275 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1277 if (bfd_link_pic (info
))
1279 Elf_Internal_Rela outrel
;
1282 srelgot
= htab
->root
.srelgot
;
1283 BFD_ASSERT (srelgot
!= NULL
);
1285 outrel
.r_offset
= (sgot
->output_section
->vma
1286 + sgot
->output_offset
1288 outrel
.r_info
= ELF32_R_INFO (0, R_CRIS_RELATIVE
);
1289 outrel
.r_addend
= relocation
;
1290 loc
= srelgot
->contents
;
1291 loc
+= srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1292 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1295 local_got_offsets
[r_symndx
] |= 1;
1299 relocation
= sgot
->output_offset
+ off
;
1300 if (rel
->r_addend
!= 0)
1302 /* We can't do anything for a relocation which is against
1303 a symbol *plus offset*. GOT holds relocations for
1304 symbols. Make this an error; the compiler isn't
1305 allowed to pass us these kinds of things. */
1308 /* xgettext:c-format */
1309 (_("%pB, section %pA: relocation %s with non-zero addend"
1310 " %" PRId64
" against local symbol"),
1313 cris_elf_howto_table
[r_type
].name
,
1314 (int64_t) rel
->r_addend
);
1317 /* xgettext:c-format */
1318 (_("%pB, section %pA: relocation %s with non-zero addend"
1319 " %" PRId64
" against symbol `%s'"),
1322 cris_elf_howto_table
[r_type
].name
,
1323 (int64_t) rel
->r_addend
,
1324 symname
[0] != '\0' ? symname
: _("[whose name is lost]"));
1326 bfd_set_error (bfd_error_bad_value
);
1332 case R_CRIS_32_GOTREL
:
1333 /* This relocation must only be performed against local symbols.
1334 It's also ok when we link a program and the symbol is either
1335 defined in an ordinary (non-DSO) object or is undefined weak. */
1337 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1338 && !(!bfd_link_pic (info
)
1341 && h
->root
.type
== bfd_link_hash_undefweak
))))
1344 /* xgettext:c-format */
1345 (_("%pB, section %pA: relocation %s is"
1346 " not allowed for global symbol: `%s'"),
1349 cris_elf_howto_table
[r_type
].name
,
1351 bfd_set_error (bfd_error_bad_value
);
1355 /* This can happen if we get a link error with the input ELF
1356 variant mismatching the output variant. Emit an error so
1357 it's noticed if it happens elsewhere. */
1361 /* xgettext:c-format */
1362 (_("%pB, section %pA: relocation %s with no GOT created"),
1365 cris_elf_howto_table
[r_type
].name
);
1366 bfd_set_error (bfd_error_bad_value
);
1370 /* This relocation is like a PC-relative one, except the
1371 reference point is the location of GOT. Note that
1372 sgot->output_offset is not involved in this calculation. We
1373 always want the start of entire .got section, not the
1374 position after the reserved header. */
1375 relocation
-= sgot
->output_section
->vma
;
1378 case R_CRIS_32_PLT_PCREL
:
1379 /* Relocation is to the entry for this symbol in the
1380 procedure linkage table. */
1382 /* Resolve a PLT_PCREL reloc against a local symbol directly,
1383 without using the procedure linkage table. */
1384 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
1387 if (h
->plt
.offset
== (bfd_vma
) -1
1390 /* We didn't make a PLT entry for this symbol. This
1391 happens when statically linking PIC code, or when
1392 using -Bsymbolic. */
1396 relocation
= (splt
->output_section
->vma
1397 + splt
->output_offset
1401 case R_CRIS_32_PLT_GOTREL
:
1402 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1403 start of the .got section. See also comment at
1405 relocation
-= sgot
->output_section
->vma
;
1407 /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1408 without using the procedure linkage table. */
1409 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
1412 if (h
->plt
.offset
== (bfd_vma
) -1
1415 /* We didn't make a PLT entry for this symbol. This
1416 happens when statically linking PIC code, or when
1417 using -Bsymbolic. */
1421 relocation
= (splt
->output_section
->vma
1422 + splt
->output_offset
1424 - sgot
->output_section
->vma
);
1427 case R_CRIS_8_PCREL
:
1428 case R_CRIS_16_PCREL
:
1429 case R_CRIS_32_PCREL
:
1430 /* If the symbol was local, we need no shlib-specific handling. */
1431 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1432 || h
->dynindx
== -1)
1439 if (bfd_link_pic (info
)
1440 && !resolved_to_zero
1441 && r_symndx
!= STN_UNDEF
1442 && (input_section
->flags
& SEC_ALLOC
) != 0
1443 && ((r_type
!= R_CRIS_8_PCREL
1444 && r_type
!= R_CRIS_16_PCREL
1445 && r_type
!= R_CRIS_32_PCREL
)
1446 || (!SYMBOLIC_BIND (info
, h
)
1447 || (h
!= NULL
&& !h
->def_regular
))))
1449 Elf_Internal_Rela outrel
;
1451 bfd_boolean skip
, relocate
;
1453 /* When generating a shared object, these relocations
1454 are copied into the output file to be resolved at run
1459 sreloc
= _bfd_elf_get_dynamic_reloc_section
1460 (dynobj
, input_section
, /*rela?*/ TRUE
);
1461 /* The section should have been created in cris_elf_check_relocs,
1462 but that function will not be called for objects which fail in
1463 cris_elf_merge_private_bfd_data. */
1466 bfd_set_error (bfd_error_bad_value
);
1475 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1477 if (outrel
.r_offset
== (bfd_vma
) -1)
1479 else if (outrel
.r_offset
== (bfd_vma
) -2
1480 /* For now, undefined weak symbols with non-default
1481 visibility (yielding 0), like exception info for
1482 discarded sections, will get a R_CRIS_NONE
1483 relocation rather than no relocation, because we
1484 notice too late that the symbol doesn't need a
1487 && h
->root
.type
== bfd_link_hash_undefweak
1488 && ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
))
1489 skip
= TRUE
, relocate
= TRUE
;
1490 outrel
.r_offset
+= (input_section
->output_section
->vma
1491 + input_section
->output_offset
);
1494 memset (&outrel
, 0, sizeof outrel
);
1495 /* h->dynindx may be -1 if the symbol was marked to
1498 && ((!SYMBOLIC_BIND (info
, h
) && h
->dynindx
!= -1)
1499 || !h
->def_regular
))
1501 BFD_ASSERT (h
->dynindx
!= -1);
1502 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
1503 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1507 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1509 if (r_type
== R_CRIS_32
)
1512 outrel
.r_info
= ELF32_R_INFO (0, R_CRIS_RELATIVE
);
1518 if (bfd_is_abs_section (sec
))
1520 else if (sec
== NULL
|| sec
->owner
== NULL
)
1522 bfd_set_error (bfd_error_bad_value
);
1529 /* We are turning this relocation into one
1530 against a section symbol. It would be
1531 proper to subtract the symbol's value,
1532 osec->vma, from the emitted reloc addend,
1533 but ld.so expects buggy relocs. */
1534 osec
= sec
->output_section
;
1535 indx
= elf_section_data (osec
)->dynindx
;
1538 osec
= htab
->root
.text_index_section
;
1539 indx
= elf_section_data (osec
)->dynindx
;
1541 BFD_ASSERT (indx
!= 0);
1544 outrel
.r_info
= ELF32_R_INFO (indx
, r_type
);
1548 loc
= sreloc
->contents
;
1549 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1550 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1552 /* This reloc will be computed at runtime, so there's no
1553 need to do anything now, except for R_CRIS_32 relocations
1554 that have been turned into R_CRIS_RELATIVE. */
1561 case R_CRIS_16_DTPREL
:
1562 case R_CRIS_32_DTPREL
:
1563 /* This relocation must only be performed against local
1564 symbols, or to sections that are not loadable. It's also
1565 ok when we link a program and the symbol is defined in an
1566 ordinary (non-DSO) object (if it's undefined there, we've
1567 already seen an error). */
1569 && (input_section
->flags
& SEC_ALLOC
) != 0
1570 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1571 && (bfd_link_pic (info
)
1573 && h
->root
.type
!= bfd_link_hash_undefined
)))
1576 ((h
->root
.type
== bfd_link_hash_undefined
)
1577 /* We shouldn't get here for GCC-emitted code. */
1578 /* xgettext:c-format */
1579 ? _("%pB, section %pA: relocation %s has an undefined"
1580 " reference to `%s', perhaps a declaration mixup?")
1581 /* xgettext:c-format */
1582 : _("%pB, section %pA: relocation %s is"
1583 " not allowed for `%s', a global symbol with default"
1584 " visibility, perhaps a declaration mixup?"),
1587 cris_elf_howto_table
[r_type
].name
,
1588 symname
!= NULL
&& symname
[0] != '\0'
1589 ? symname
: _("[whose name is lost]"));
1590 bfd_set_error (bfd_error_bad_value
);
1594 BFD_ASSERT ((input_section
->flags
& SEC_ALLOC
) == 0
1595 || htab
->dtpmod_refcount
!= 0);
1597 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1598 already done so. Note that we do this in .got.plt, not
1599 in .got, as .got.plt contains the first part, still the
1600 reloc is against .got, because the linker script directs
1601 (is required to direct) them both into .got. */
1602 if (htab
->dtpmod_refcount
> 0
1603 && (input_section
->flags
& SEC_ALLOC
) != 0)
1605 asection
*sgotplt
= htab
->root
.sgotplt
;
1606 BFD_ASSERT (sgotplt
!= NULL
);
1608 if (bfd_link_pic (info
))
1610 Elf_Internal_Rela outrel
;
1613 srelgot
= htab
->root
.srelgot
;
1614 BFD_ASSERT (srelgot
!= NULL
);
1615 loc
= srelgot
->contents
;
1616 loc
+= srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1618 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgotplt
->contents
+ 12);
1619 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgotplt
->contents
+ 16);
1620 outrel
.r_offset
= (sgotplt
->output_section
->vma
1621 + sgotplt
->output_offset
1623 outrel
.r_info
= ELF32_R_INFO (0, R_CRIS_DTPMOD
);
1624 outrel
.r_addend
= 0;
1625 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1629 /* For an executable, the GOT entry contents is known. */
1630 bfd_put_32 (output_bfd
, (bfd_vma
) 1, sgotplt
->contents
+ 12);
1631 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgotplt
->contents
+ 16);
1634 /* Reverse the sign to mark that we've emitted the
1635 required GOT entry. */
1636 htab
->dtpmod_refcount
= - htab
->dtpmod_refcount
;
1639 /* The relocation is the offset from the start of the module
1640 TLS block to the (local) symbol. */
1641 relocation
-= elf_hash_table (info
)->tls_sec
== NULL
1642 ? 0 : elf_hash_table (info
)->tls_sec
->vma
;
1646 if (bfd_link_pic (info
))
1648 bfd_set_error (bfd_error_invalid_operation
);
1650 /* We've already informed in cris_elf_check_relocs that
1651 this is an error. */
1656 case R_CRIS_16_GOT_GD
:
1657 case R_CRIS_32_GOT_GD
:
1658 if (rel
->r_addend
!= 0)
1660 /* We can't do anything for a relocation which is against a
1661 symbol *plus offset*. The GOT holds relocations for
1662 symbols. Make this an error; the compiler isn't allowed
1663 to pass us these kinds of things. */
1665 /* xgettext:c-format */
1666 (_("%pB, section %pA: relocation %s with non-zero addend"
1667 " %" PRId64
" against symbol `%s'"),
1670 cris_elf_howto_table
[r_type
].name
,
1671 (int64_t) rel
->r_addend
,
1672 symname
[0] != '\0' ? symname
: _("[whose name is lost]"));
1674 bfd_set_error (bfd_error_bad_value
);
1678 if (!bfd_link_pic (info
)
1679 && (h
== NULL
|| h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
1681 /* Known contents of the GOT. */
1684 /* The symbol is defined in the program, so just write
1685 (1, known_tpoffset) into the GOT. */
1686 relocation
-= elf_hash_table (info
)->tls_sec
->vma
;
1690 off
= elf_cris_hash_entry (h
)->tprel_refcount
> 0
1691 ? h
->got
.offset
+ 4 : h
->got
.offset
;
1695 off
= local_got_offsets
[r_symndx
];
1696 if (local_got_offsets
[LGOT_TPREL_NDX (r_symndx
)])
1700 /* We use bit 1 of the offset as a flag for GOT entry with
1701 the R_CRIS_DTP reloc, setting it when we've emitted the
1702 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
1711 local_got_offsets
[r_symndx
] |= 2;
1713 bfd_put_32 (output_bfd
, 1, sgot
->contents
+ off
);
1714 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
+ 4);
1719 relocation
= sgot
->output_offset
+ off
1720 + (r_type
== R_CRIS_32_GD
? sgot
->output_section
->vma
: 0);
1724 /* Not all parts of the GOT entry are known; emit a real
1729 off
= elf_cris_hash_entry (h
)->tprel_refcount
> 0
1730 ? h
->got
.offset
+ 4 : h
->got
.offset
;
1733 off
= local_got_offsets
[r_symndx
];
1734 if (local_got_offsets
[LGOT_TPREL_NDX (r_symndx
)])
1738 /* See above re bit 1 and bit 0 usage. */
1741 Elf_Internal_Rela outrel
;
1749 local_got_offsets
[r_symndx
] |= 2;
1751 /* Clear the target contents of the GOT (just as a
1752 gesture; it's already cleared on allocation): this
1753 relocation is not like the other dynrelocs. */
1754 bfd_put_32 (output_bfd
, 0, sgot
->contents
+ off
);
1755 bfd_put_32 (output_bfd
, 0, sgot
->contents
+ off
+ 4);
1757 srelgot
= htab
->root
.srelgot
;
1758 BFD_ASSERT (srelgot
!= NULL
);
1760 if (h
!= NULL
&& h
->dynindx
!= -1)
1762 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_CRIS_DTP
);
1767 outrel
.r_info
= ELF32_R_INFO (0, R_CRIS_DTP
);
1769 /* NULL if we had an error. */
1770 relocation
-= elf_hash_table (info
)->tls_sec
== NULL
1771 ? 0 : elf_hash_table (info
)->tls_sec
->vma
;
1774 outrel
.r_offset
= (sgot
->output_section
->vma
1775 + sgot
->output_offset
1777 outrel
.r_addend
= relocation
;
1778 loc
= srelgot
->contents
;
1779 loc
+= srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1781 /* NULL if we had an error. */
1782 if (srelgot
->contents
!= NULL
)
1783 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1788 relocation
= sgot
->output_offset
+ off
1789 + (r_type
== R_CRIS_32_GD
? sgot
->output_section
->vma
: 0);
1792 /* The GOT-relative offset to the GOT entry is the
1793 relocation, or for R_CRIS_32_GD, the actual address of
1798 if (bfd_link_pic (info
))
1800 bfd_set_error (bfd_error_invalid_operation
);
1802 /* We've already informed in cris_elf_check_relocs that
1803 this is an error. */
1808 case R_CRIS_32_GOT_TPREL
:
1809 case R_CRIS_16_GOT_TPREL
:
1810 if (rel
->r_addend
!= 0)
1812 /* We can't do anything for a relocation which is
1813 against a symbol *plus offset*. GOT holds
1814 relocations for symbols. Make this an error; the
1815 compiler isn't allowed to pass us these kinds of
1818 /* xgettext:c-format */
1819 (_("%pB, section %pA: relocation %s with non-zero addend"
1820 " %" PRId64
" against symbol `%s'"),
1823 cris_elf_howto_table
[r_type
].name
,
1824 (int64_t) rel
->r_addend
,
1825 symname
[0] != '\0' ? symname
: _("[whose name is lost]"));
1826 bfd_set_error (bfd_error_bad_value
);
1830 if (!bfd_link_pic (info
)
1831 && (h
== NULL
|| h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
1833 /* Known contents of the GOT. */
1836 /* The symbol is defined in the program, so just write
1837 the -prog_tls_size+known_tpoffset into the GOT. */
1838 relocation
-= elf_hash_table (info
)->tls_sec
->vma
;
1839 relocation
-= elf_hash_table (info
)->tls_size
;
1842 off
= h
->got
.offset
;
1844 off
= local_got_offsets
[r_symndx
];
1846 /* Bit 0 is used to mark whether we've emitted the required
1847 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
1848 is used similarly for R_CRIS_DTP, see above. */
1856 local_got_offsets
[r_symndx
] |= 1;
1858 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1863 relocation
= sgot
->output_offset
+ off
1864 + (r_type
== R_CRIS_32_IE
? sgot
->output_section
->vma
: 0);
1868 /* Emit a real relocation. */
1872 off
= h
->got
.offset
;
1874 off
= local_got_offsets
[r_symndx
];
1876 /* See above re usage of bit 0 and 1. */
1879 Elf_Internal_Rela outrel
;
1887 local_got_offsets
[r_symndx
] |= 1;
1889 srelgot
= htab
->root
.srelgot
;
1890 BFD_ASSERT (srelgot
!= NULL
);
1892 if (h
!= NULL
&& h
->dynindx
!= -1)
1894 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_CRIS_32_TPREL
);
1899 outrel
.r_info
= ELF32_R_INFO (0, R_CRIS_32_TPREL
);
1901 /* NULL if we had an error. */
1902 relocation
-= elf_hash_table (info
)->tls_sec
== NULL
1903 ? 0 : elf_hash_table (info
)->tls_sec
->vma
;
1906 /* Just "define" the initial contents in some
1907 semi-logical way. */
1908 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1910 outrel
.r_offset
= (sgot
->output_section
->vma
1911 + sgot
->output_offset
1913 outrel
.r_addend
= relocation
;
1914 loc
= srelgot
->contents
;
1915 loc
+= srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1916 /* NULL if we had an error. */
1917 if (srelgot
->contents
!= NULL
)
1918 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1923 relocation
= sgot
->output_offset
+ off
1924 + (r_type
== R_CRIS_32_IE
? sgot
->output_section
->vma
: 0);
1927 /* The GOT-relative offset to the GOT entry is the relocation,
1928 or for R_CRIS_32_GD, the actual address of the GOT entry. */
1931 case R_CRIS_16_TPREL
:
1932 case R_CRIS_32_TPREL
:
1933 /* This relocation must only be performed against symbols
1934 defined in an ordinary (non-DSO) object. */
1935 if (bfd_link_pic (info
))
1937 bfd_set_error (bfd_error_invalid_operation
);
1939 /* We've already informed in cris_elf_check_relocs that
1940 this is an error. */
1945 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1946 && !(h
->def_regular
|| ELF_COMMON_DEF_P (h
))
1947 /* If it's undefined, then an error message has already
1949 && h
->root
.type
!= bfd_link_hash_undefined
)
1952 /* xgettext:c-format */
1953 (_("%pB, section %pA: relocation %s is"
1954 " not allowed for symbol: `%s'"
1955 " which is defined outside the program,"
1956 " perhaps a declaration mixup?"),
1959 cris_elf_howto_table
[r_type
].name
,
1961 bfd_set_error (bfd_error_bad_value
);
1965 /* NULL if we had an error. */
1966 relocation
-= elf_hash_table (info
)->tls_sec
== NULL
1968 : (elf_hash_table (info
)->tls_sec
->vma
1969 + elf_hash_table (info
)->tls_size
);
1971 /* The TLS-relative offset is the relocation. */
1979 r
= cris_final_link_relocate (howto
, input_bfd
, input_section
,
1980 contents
, rel
, relocation
);
1982 if (r
!= bfd_reloc_ok
)
1984 const char * msg
= (const char *) NULL
;
1988 case bfd_reloc_overflow
:
1989 (*info
->callbacks
->reloc_overflow
)
1990 (info
, (h
? &h
->root
: NULL
), symname
, howto
->name
,
1991 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1992 if (additional_relocation_error_msg_count
> 0)
1994 additional_relocation_error_msg_count
--;
1997 case R_CRIS_16_GOTPLT
:
2000 /* Not just TLS is involved here, so we make
2001 generation and message depend on -fPIC/-fpic
2003 case R_CRIS_16_GOT_TPREL
:
2004 case R_CRIS_16_GOT_GD
:
2006 (_("(too many global variables for -fpic:"
2007 " recompile with -fPIC)"));
2010 case R_CRIS_16_TPREL
:
2011 case R_CRIS_16_DTPREL
:
2013 (_("(thread-local data too big for -fpic or"
2014 " -msmall-tls: recompile with -fPIC or"
2015 " -mno-small-tls)"));
2018 /* No known cause for overflow for other relocs. */
2025 case bfd_reloc_undefined
:
2026 (*info
->callbacks
->undefined_symbol
)
2027 (info
, symname
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
2030 case bfd_reloc_outofrange
:
2031 msg
= _("internal error: out of range error");
2034 case bfd_reloc_notsupported
:
2035 msg
= _("internal error: unsupported relocation error");
2038 case bfd_reloc_dangerous
:
2039 msg
= _("internal error: dangerous relocation");
2043 msg
= _("internal error: unknown error");
2048 (*info
->callbacks
->warning
) (info
, msg
, symname
, input_bfd
,
2049 input_section
, rel
->r_offset
);
2056 /* Finish up dynamic symbol handling. We set the contents of various
2057 dynamic sections here. */
2060 elf_cris_finish_dynamic_symbol (bfd
*output_bfd
,
2061 struct bfd_link_info
*info
,
2062 struct elf_link_hash_entry
*h
,
2063 Elf_Internal_Sym
*sym
)
2065 struct elf_cris_link_hash_table
* htab
;
2067 /* Where in the plt entry to put values. */
2068 int plt_off1
= 2, plt_off2
= 10, plt_off3
= 16;
2070 /* What offset to add to the distance to the first PLT entry for the
2071 value at plt_off3. */
2072 int plt_off3_value_bias
= 4;
2074 /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2075 for PIC and non-PIC for v32 and pre-v32). */
2076 int plt_stub_offset
= 8;
2077 int plt_entry_size
= PLT_ENTRY_SIZE
;
2078 const bfd_byte
*plt_entry
= elf_cris_plt_entry
;
2079 const bfd_byte
*plt_pic_entry
= elf_cris_pic_plt_entry
;
2081 htab
= elf_cris_hash_table (info
);
2085 /* Adjust the various PLT entry offsets. */
2086 if (bfd_get_mach (output_bfd
) == bfd_mach_cris_v32
)
2090 plt_off3_value_bias
= -2;
2091 plt_stub_offset
= 12;
2092 plt_entry_size
= PLT_ENTRY_SIZE_V32
;
2093 plt_entry
= elf_cris_plt_entry_v32
;
2094 plt_pic_entry
= elf_cris_pic_plt_entry_v32
;
2097 if (h
->plt
.offset
!= (bfd_vma
) -1)
2104 bfd_vma gotplt_offset
2105 = elf_cris_hash_entry (h
)->gotplt_offset
;
2106 Elf_Internal_Rela rela
;
2108 bfd_boolean has_gotplt
= gotplt_offset
!= 0;
2110 /* Get the index in the .rela.plt relocations for the .got.plt
2111 entry that corresponds to this symbol.
2112 We have to count backwards here, and the result is only valid
2113 as an index into .rela.plt. We also have to undo the effect
2114 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2115 .got.plt) for which gotplt_offset is adjusted, because while
2116 that entry goes into .got.plt, its relocation goes into
2117 .rela.got, not .rela.plt. (It's not PLT-specific; not to be
2118 processed as part of the runtime lazy .rela.plt relocation).
2119 FIXME: There be literal constants here... */
2120 bfd_vma rela_plt_index
2121 = (htab
->dtpmod_refcount
!= 0
2122 ? gotplt_offset
/4 - 2 - 3 : gotplt_offset
/4 - 3);
2124 /* Get the offset into the .got table of the entry that corresponds
2125 to this function. Note that we embed knowledge that "incoming"
2126 .got goes after .got.plt in the output without padding (pointer
2127 aligned). However, that knowledge is present in several other
2132 : h
->got
.offset
+ htab
->next_gotplt_entry
);
2134 /* This symbol has an entry in the procedure linkage table. Set it
2137 BFD_ASSERT (h
->dynindx
!= -1);
2139 splt
= htab
->root
.splt
;
2140 sgotplt
= htab
->root
.sgotplt
;
2141 srela
= htab
->root
.srelplt
;
2142 BFD_ASSERT (splt
!= NULL
&& sgotplt
!= NULL
2143 && (! has_gotplt
|| srela
!= NULL
));
2145 got_base
= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
2147 /* Fill in the entry in the procedure linkage table. */
2148 if (! bfd_link_pic (info
))
2150 memcpy (splt
->contents
+ h
->plt
.offset
, plt_entry
,
2153 /* We need to enter the absolute address of the GOT entry here. */
2154 bfd_put_32 (output_bfd
, got_base
+ got_offset
,
2155 splt
->contents
+ h
->plt
.offset
+ plt_off1
);
2159 memcpy (splt
->contents
+ h
->plt
.offset
, plt_pic_entry
,
2161 bfd_put_32 (output_bfd
, got_offset
,
2162 splt
->contents
+ h
->plt
.offset
+ plt_off1
);
2165 /* Fill in the plt entry and make a relocation, if this is a "real"
2169 /* Fill in the offset to the reloc table. */
2170 bfd_put_32 (output_bfd
,
2171 rela_plt_index
* sizeof (Elf32_External_Rela
),
2172 splt
->contents
+ h
->plt
.offset
+ plt_off2
);
2174 /* Fill in the offset to the first PLT entry, where to "jump". */
2175 bfd_put_32 (output_bfd
,
2176 - (h
->plt
.offset
+ plt_off3
+ plt_off3_value_bias
),
2177 splt
->contents
+ h
->plt
.offset
+ plt_off3
);
2179 /* Fill in the entry in the global offset table with the address of
2180 the relocating stub. */
2181 bfd_put_32 (output_bfd
,
2182 (splt
->output_section
->vma
2183 + splt
->output_offset
2186 sgotplt
->contents
+ got_offset
);
2188 /* Fill in the entry in the .rela.plt section. */
2189 rela
.r_offset
= (sgotplt
->output_section
->vma
2190 + sgotplt
->output_offset
2192 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_CRIS_JUMP_SLOT
);
2194 loc
= srela
->contents
+ rela_plt_index
* sizeof (Elf32_External_Rela
);
2195 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
2198 if (!h
->def_regular
)
2200 /* Mark the symbol as undefined, rather than as defined in
2201 the .plt section. Leave the value alone. */
2202 sym
->st_shndx
= SHN_UNDEF
;
2204 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
2205 know whether resetting the value is significant; if it really
2206 is, rather than a quirk or bug in the sparc port, then I
2207 believe we'd see this elsewhere. */
2208 /* If the symbol is weak, we do need to clear the value.
2209 Otherwise, the PLT entry would provide a definition for
2210 the symbol even if the symbol wasn't defined anywhere,
2211 and so the symbol would never be NULL. */
2212 if (!h
->ref_regular_nonweak
)
2217 /* For an ordinary program, we emit .got relocs only for symbols that
2218 are in the dynamic-symbols table and are either defined by the
2219 program or are undefined weak symbols, or are function symbols
2220 where we do not output a PLT: the PLT reloc was output above and all
2221 references to the function symbol are redirected to the PLT. */
2222 if (h
->got
.offset
!= (bfd_vma
) -1
2223 && (elf_cris_hash_entry (h
)->reg_got_refcount
> 0)
2224 && (bfd_link_pic (info
)
2225 || (h
->dynindx
!= -1
2226 && h
->plt
.offset
== (bfd_vma
) -1
2228 && h
->root
.type
!= bfd_link_hash_undefweak
)))
2232 Elf_Internal_Rela rela
;
2236 /* This symbol has an entry in the global offset table. Set it up. */
2238 sgot
= htab
->root
.sgot
;
2239 srela
= htab
->root
.srelgot
;
2240 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
2242 rela
.r_offset
= (sgot
->output_section
->vma
2243 + sgot
->output_offset
2244 + (h
->got
.offset
&~ (bfd_vma
) 1));
2246 /* If this is a static link, or it is a -Bsymbolic link and the
2247 symbol is defined locally or was forced to be local because
2248 of a version file, we just want to emit a RELATIVE reloc.
2249 The entry in the global offset table will already have been
2250 initialized in the relocate_section function. */
2251 where
= sgot
->contents
+ (h
->got
.offset
&~ (bfd_vma
) 1);
2252 if (! elf_hash_table (info
)->dynamic_sections_created
2253 || (bfd_link_pic (info
)
2254 && (SYMBOLIC_BIND (info
, h
) || h
->dynindx
== -1)
2257 rela
.r_info
= ELF32_R_INFO (0, R_CRIS_RELATIVE
);
2258 rela
.r_addend
= bfd_get_signed_32 (output_bfd
, where
);
2262 bfd_put_32 (output_bfd
, (bfd_vma
) 0, where
);
2263 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_CRIS_GLOB_DAT
);
2267 loc
= srela
->contents
;
2268 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
2269 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
2275 Elf_Internal_Rela rela
;
2278 /* This symbol needs a copy reloc. Set it up. */
2280 BFD_ASSERT (h
->dynindx
!= -1
2281 && (h
->root
.type
== bfd_link_hash_defined
2282 || h
->root
.type
== bfd_link_hash_defweak
));
2284 if (h
->root
.u
.def
.section
== htab
->root
.sdynrelro
)
2285 s
= htab
->root
.sreldynrelro
;
2287 s
= htab
->root
.srelbss
;
2289 rela
.r_offset
= (h
->root
.u
.def
.value
2290 + h
->root
.u
.def
.section
->output_section
->vma
2291 + h
->root
.u
.def
.section
->output_offset
);
2292 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_CRIS_COPY
);
2294 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
2295 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
2298 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2299 if (h
== elf_hash_table (info
)->hdynamic
2300 || h
== elf_hash_table (info
)->hgot
)
2301 sym
->st_shndx
= SHN_ABS
;
2306 /* Finish up the dynamic sections. Do *not* emit relocs here, as their
2307 offsets were changed, as part of -z combreloc handling, from those we
2311 elf_cris_finish_dynamic_sections (bfd
*output_bfd
,
2312 struct bfd_link_info
*info
)
2318 dynobj
= elf_hash_table (info
)->dynobj
;
2320 sgot
= elf_hash_table (info
)->sgotplt
;
2321 BFD_ASSERT (sgot
!= NULL
);
2322 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
2324 if (elf_hash_table (info
)->dynamic_sections_created
)
2327 Elf32_External_Dyn
*dyncon
, *dynconend
;
2329 splt
= elf_hash_table (info
)->splt
;
2330 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
2332 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
2333 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
2334 for (; dyncon
< dynconend
; dyncon
++)
2336 Elf_Internal_Dyn dyn
;
2339 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
2347 dyn
.d_un
.d_ptr
= sgot
->output_section
->vma
+ sgot
->output_offset
;
2348 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2352 /* Yes, we *can* have a .plt and no .plt.rela, for instance
2353 if all symbols are found in the .got (not .got.plt). */
2354 s
= elf_hash_table (info
)->srelplt
;
2355 dyn
.d_un
.d_ptr
= s
!= NULL
? (s
->output_section
->vma
2356 + s
->output_offset
) : 0;
2357 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2361 s
= elf_hash_table (info
)->srelplt
;
2365 dyn
.d_un
.d_val
= s
->size
;
2366 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2371 /* Fill in the first entry in the procedure linkage table. */
2374 if (bfd_get_mach (output_bfd
) == bfd_mach_cris_v32
)
2376 if (bfd_link_pic (info
))
2377 memcpy (splt
->contents
, elf_cris_pic_plt0_entry_v32
,
2378 PLT_ENTRY_SIZE_V32
);
2381 memcpy (splt
->contents
, elf_cris_plt0_entry_v32
,
2382 PLT_ENTRY_SIZE_V32
);
2383 bfd_put_32 (output_bfd
,
2384 sgot
->output_section
->vma
2385 + sgot
->output_offset
+ 4,
2386 splt
->contents
+ 4);
2388 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
2389 = PLT_ENTRY_SIZE_V32
;
2394 if (bfd_link_pic (info
))
2395 memcpy (splt
->contents
, elf_cris_pic_plt0_entry
,
2399 memcpy (splt
->contents
, elf_cris_plt0_entry
,
2401 bfd_put_32 (output_bfd
,
2402 sgot
->output_section
->vma
2403 + sgot
->output_offset
+ 4,
2404 splt
->contents
+ 6);
2405 bfd_put_32 (output_bfd
,
2406 sgot
->output_section
->vma
2407 + sgot
->output_offset
+ 8,
2408 splt
->contents
+ 14);
2410 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
2417 /* Fill in the first three entries in the global offset table. */
2421 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
2423 bfd_put_32 (output_bfd
,
2424 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
2426 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
2427 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
2430 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
2435 /* Return the section that should be marked against GC for a given
2439 cris_elf_gc_mark_hook (asection
*sec
,
2440 struct bfd_link_info
*info
,
2441 Elf_Internal_Rela
*rel
,
2442 struct elf_link_hash_entry
*h
,
2443 Elf_Internal_Sym
*sym
)
2445 enum elf_cris_reloc_type r_type
= ELF32_R_TYPE (rel
->r_info
);
2449 case R_CRIS_GNU_VTINHERIT
:
2450 case R_CRIS_GNU_VTENTRY
:
2457 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2460 /* The elf_backend_plt_sym_val hook function. */
2463 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED
, const asection
*plt
,
2466 bfd_size_type plt_entry_size
;
2467 bfd_size_type pltoffs
;
2468 bfd
*abfd
= plt
->owner
;
2470 /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */
2471 bfd_size_type plt_entry_got_offset
= 2;
2472 bfd_size_type plt_sec_size
;
2473 bfd_size_type got_vma_for_dyn
;
2476 /* FIXME: the .got section should be readily available also when
2477 we're not linking. */
2478 if ((got
= bfd_get_section_by_name (abfd
, ".got")) == NULL
)
2479 return (bfd_vma
) -1;
2481 plt_sec_size
= bfd_section_size (plt
->owner
, plt
);
2483 = (bfd_get_mach (abfd
) == bfd_mach_cris_v32
2484 ? PLT_ENTRY_SIZE_V32
: PLT_ENTRY_SIZE
);
2486 /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */
2487 got_vma_for_dyn
= (abfd
->flags
& EXEC_P
) ? 0 : got
->vma
;
2489 /* Because we can have merged GOT entries; a single .got entry for
2490 both GOT and the PLT part of the GOT (.got.plt), the index of the
2491 reloc in .rela.plt is not the same as the index in the PLT.
2492 Instead, we have to hunt down the GOT offset in the PLT that
2493 corresponds to that of this reloc. Unfortunately, we will only
2494 be called for the .rela.plt relocs, so we'll miss synthetic
2495 symbols for .plt entries with merged GOT entries. (FIXME:
2496 fixable by providing our own bfd_elf32_get_synthetic_symtab.
2497 Doesn't seem worthwile at time of this writing.) FIXME: we've
2498 gone from O(1) to O(N) (N number of PLT entries) for finding each
2499 PLT address. Shouldn't matter in practice though. */
2501 for (pltoffs
= plt_entry_size
;
2502 pltoffs
< plt_sec_size
;
2503 pltoffs
+= plt_entry_size
)
2505 bfd_size_type got_offset
;
2506 bfd_byte gotoffs_raw
[4];
2508 if (!bfd_get_section_contents (abfd
, (asection
*) plt
, gotoffs_raw
,
2509 pltoffs
+ plt_entry_got_offset
,
2510 sizeof (gotoffs_raw
)))
2511 return (bfd_vma
) -1;
2513 got_offset
= bfd_get_32 (abfd
, gotoffs_raw
);
2514 if (got_offset
+ got_vma_for_dyn
== rel
->address
)
2515 return plt
->vma
+ pltoffs
;
2518 /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2519 that'd not be graceful behavior for invalid input. */
2520 return (bfd_vma
) -1;
2523 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2524 entry but we found we will not create any. Called when we find we will
2525 not have any PLT for this symbol, by for example
2526 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2527 or elf_cris_size_dynamic_sections if no dynamic sections will be
2528 created (we're only linking static objects). */
2531 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry
*h
, void * p
)
2533 struct bfd_link_info
*info
= (struct bfd_link_info
*) p
;
2535 /* A GOTPLT reloc, when activated, is supposed to be included into
2536 the PLT refcount, when the symbol isn't set-or-forced local. */
2537 BFD_ASSERT (h
->gotplt_refcount
== 0
2538 || h
->root
.plt
.refcount
== -1
2539 || h
->gotplt_refcount
<= h
->root
.plt
.refcount
);
2541 /* If nobody wanted a GOTPLT with this symbol, we're done. */
2542 if (h
->gotplt_refcount
<= 0)
2545 if (h
->reg_got_refcount
> 0)
2547 /* There's a GOT entry for this symbol. Just adjust the refcounts.
2548 Probably not necessary at this stage, but keeping them accurate
2549 helps avoiding surprises later. */
2550 h
->root
.got
.refcount
+= h
->gotplt_refcount
;
2551 h
->reg_got_refcount
+= h
->gotplt_refcount
;
2552 h
->gotplt_refcount
= 0;
2556 /* No GOT entry for this symbol. We need to create one. */
2560 sgot
= elf_hash_table (info
)->sgot
;
2561 srelgot
= elf_hash_table (info
)->srelgot
;
2563 /* Put accurate refcounts there. */
2564 BFD_ASSERT (h
->root
.got
.refcount
>= 0);
2565 h
->root
.got
.refcount
+= h
->gotplt_refcount
;
2566 h
->reg_got_refcount
= h
->gotplt_refcount
;
2568 h
->gotplt_refcount
= 0;
2570 /* We always have a .got and a .rela.got section if there were
2571 GOTPLT relocs in input. */
2572 BFD_ASSERT (sgot
!= NULL
&& srelgot
!= NULL
);
2574 /* Allocate space in the .got section. */
2577 /* Allocate relocation space. */
2578 srelgot
->size
+= sizeof (Elf32_External_Rela
);
2584 /* Try to fold PLT entries with GOT entries. There are two cases when we
2587 - When all PLT references are GOTPLT references, and there are GOT
2588 references, and this is not the executable. We don't have to
2589 generate a PLT at all.
2591 - When there are both (ordinary) PLT references and GOT references,
2592 and this isn't the executable.
2593 We want to make the PLT reference use the ordinary GOT entry rather
2594 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2595 since the GOT entry will have to be resolved at startup anyway.
2597 Though the latter case is handled when room for the PLT is allocated,
2600 By folding into the GOT, we may need a round-trip to a PLT in the
2601 executable for calls, a loss in performance. Still, losing a
2602 reloc is a win in size and at least in start-up time.
2604 Note that this function is called before symbols are forced local by
2605 version scripts. The differing cases are handled by
2606 elf_cris_hide_symbol. */
2609 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry
*h
, void * p
)
2611 struct bfd_link_info
*info
= (struct bfd_link_info
*) p
;
2613 /* If there are no GOT references for this symbol, we can't fold any
2614 other reference so there's nothing to do. Likewise if there are no
2615 PLT references; GOTPLT references included. */
2616 if (h
->root
.got
.refcount
<= 0 || h
->root
.plt
.refcount
<= 0)
2619 /* GOTPLT relocs are supposed to be included into the PLT refcount. */
2620 BFD_ASSERT (h
->gotplt_refcount
<= h
->root
.plt
.refcount
);
2622 if (h
->gotplt_refcount
== h
->root
.plt
.refcount
)
2624 /* The only PLT references are GOTPLT references, and there are GOT
2625 references. Convert PLT to GOT references. */
2626 if (! elf_cris_adjust_gotplt_to_got (h
, info
))
2629 /* Clear the PLT references, so no PLT will be created. */
2630 h
->root
.plt
.offset
= (bfd_vma
) -1;
2636 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2637 to use a GOT entry (and create one) rather than requiring a GOTPLT
2641 elf_cris_hide_symbol (struct bfd_link_info
*info
,
2642 struct elf_link_hash_entry
*h
,
2643 bfd_boolean force_local
)
2645 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry
*) h
, info
);
2647 _bfd_elf_link_hash_hide_symbol (info
, h
, force_local
);
2650 /* Adjust a symbol defined by a dynamic object and referenced by a
2651 regular object. The current definition is in some section of the
2652 dynamic object, but we're not including those sections. We have to
2653 change the definition to something the rest of the link can
2657 elf_cris_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2658 struct elf_link_hash_entry
*h
)
2660 struct elf_cris_link_hash_table
* htab
;
2664 bfd_size_type plt_entry_size
;
2666 htab
= elf_cris_hash_table (info
);
2670 dynobj
= htab
->root
.dynobj
;
2672 /* Make sure we know what is going on here. */
2673 BFD_ASSERT (dynobj
!= NULL
2678 && !h
->def_regular
)));
2681 = (bfd_get_mach (dynobj
) == bfd_mach_cris_v32
2682 ? PLT_ENTRY_SIZE_V32
: PLT_ENTRY_SIZE
);
2684 /* If this is a function, put it in the procedure linkage table. We
2685 will fill in the contents of the procedure linkage table later,
2686 when we know the address of the .got section. */
2687 if (h
->type
== STT_FUNC
2690 /* If we link a program (not a DSO), we'll get rid of unnecessary
2691 PLT entries; we point to the actual symbols -- even for pic
2692 relocs, because a program built with -fpic should have the same
2693 result as one built without -fpic, specifically considering weak
2695 FIXME: m68k and i386 differ here, for unclear reasons. */
2696 if (! bfd_link_pic (info
)
2699 /* This case can occur if we saw a PLT reloc in an input file,
2700 but the symbol was not defined by a dynamic object. In such
2701 a case, we don't actually need to build a procedure linkage
2702 table, and we can just do an absolute or PC reloc instead, or
2703 change a .got.plt index to a .got index for GOTPLT relocs. */
2704 BFD_ASSERT (h
->needs_plt
);
2706 h
->plt
.offset
= (bfd_vma
) -1;
2708 elf_cris_adjust_gotplt_to_got ((struct
2709 elf_cris_link_hash_entry
*) h
,
2713 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2714 where a pointer-equivalent symbol was unimportant (i.e. more
2715 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2716 of the PLT. We can't for the executable, because the GOT
2717 entries will point to the PLT there (and be constant). */
2718 if (bfd_link_pic (info
)
2719 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry
*)
2723 /* GC or folding may have rendered this entry unused. */
2724 if (h
->plt
.refcount
<= 0)
2727 h
->plt
.offset
= (bfd_vma
) -1;
2731 /* Make sure this symbol is output as a dynamic symbol. */
2732 if (h
->dynindx
== -1)
2734 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2738 s
= htab
->root
.splt
;
2739 BFD_ASSERT (s
!= NULL
);
2741 /* If this is the first .plt entry, make room for the special
2744 s
->size
+= plt_entry_size
;
2746 /* If this symbol is not defined in a regular file, and we are
2747 not generating a shared library, then set the symbol to this
2748 location in the .plt. */
2749 if (!bfd_link_pic (info
)
2752 h
->root
.u
.def
.section
= s
;
2753 h
->root
.u
.def
.value
= s
->size
;
2756 /* If there's already a GOT entry, use that, not a .got.plt. A
2757 GOT field still has a reference count when we get here; it's
2758 not yet changed to an offset. We can't do this for an
2759 executable, because then the reloc associated with the PLT
2760 would get a non-PLT reloc pointing to the PLT. FIXME: Move
2761 this to elf_cris_try_fold_plt_to_got. */
2762 if (bfd_link_pic (info
) && h
->got
.refcount
> 0)
2764 h
->got
.refcount
+= h
->plt
.refcount
;
2766 /* Mark the PLT offset to use the GOT entry by setting the low
2767 bit in the plt offset; it is always a multiple of
2768 plt_entry_size (which is at least a multiple of 2). */
2769 BFD_ASSERT ((s
->size
% plt_entry_size
) == 0);
2771 /* Change the PLT refcount to an offset. */
2772 h
->plt
.offset
= s
->size
;
2774 /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2775 that the got entry should be used instead. */
2776 BFD_ASSERT (((struct elf_cris_link_hash_entry
*)
2777 h
)->gotplt_offset
== 0);
2779 /* Make room for this entry. */
2780 s
->size
+= plt_entry_size
;
2785 /* No GOT reference for this symbol; prepare for an ordinary PLT. */
2786 h
->plt
.offset
= s
->size
;
2788 /* Make room for this entry. */
2789 s
->size
+= plt_entry_size
;
2791 /* We also need to make an entry in the .got.plt section, which
2792 will be placed in the .got section by the linker script. */
2793 ((struct elf_cris_link_hash_entry
*) h
)->gotplt_offset
2794 = htab
->next_gotplt_entry
;
2795 htab
->next_gotplt_entry
+= 4;
2797 s
= htab
->root
.sgotplt
;
2798 BFD_ASSERT (s
!= NULL
);
2801 /* We also need to make an entry in the .rela.plt section. */
2803 s
= htab
->root
.srelplt
;
2804 BFD_ASSERT (s
!= NULL
);
2805 s
->size
+= sizeof (Elf32_External_Rela
);
2810 /* Reinitialize the plt offset now that it is not used as a reference
2812 h
->plt
.offset
= (bfd_vma
) -1;
2814 /* If this is a weak symbol, and there is a real definition, the
2815 processor independent code will have arranged for us to see the
2816 real definition first, and we can just use the same value. */
2817 if (h
->is_weakalias
)
2819 struct elf_link_hash_entry
*def
= weakdef (h
);
2820 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
2821 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
2822 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
2826 /* This is a reference to a symbol defined by a dynamic object which
2827 is not a function. */
2829 /* If we are creating a shared library, we must presume that the
2830 only references to the symbol are via the global offset table.
2831 For such cases we need not do anything here; the relocations will
2832 be handled correctly by relocate_section. */
2833 if (bfd_link_pic (info
))
2836 /* If there are no references to this symbol that do not use the
2837 GOT, we don't need to generate a copy reloc. */
2838 if (!h
->non_got_ref
)
2841 /* We must allocate the symbol in our .dynbss section, which will
2842 become part of the .bss section of the executable. There will be
2843 an entry for this symbol in the .dynsym section. The dynamic
2844 object will contain position independent code, so all references
2845 from the dynamic object to this symbol will go through the global
2846 offset table. The dynamic linker will use the .dynsym entry to
2847 determine the address it must put in the global offset table, so
2848 both the dynamic object and the regular object will refer to the
2849 same memory location for the variable. */
2851 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2852 copy the initial value out of the dynamic object and into the
2853 runtime process image. We need to remember the offset into the
2854 .rela.bss section we are going to use. */
2856 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2858 s
= htab
->root
.sdynrelro
;
2859 srel
= htab
->root
.sreldynrelro
;
2863 s
= htab
->root
.sdynbss
;
2864 srel
= htab
->root
.srelbss
;
2866 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2868 BFD_ASSERT (srel
!= NULL
);
2869 srel
->size
+= sizeof (Elf32_External_Rela
);
2873 BFD_ASSERT (s
!= NULL
);
2875 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2878 /* Adjust our "subclass" elements for an indirect symbol. */
2881 elf_cris_copy_indirect_symbol (struct bfd_link_info
*info
,
2882 struct elf_link_hash_entry
*dir
,
2883 struct elf_link_hash_entry
*ind
)
2885 struct elf_cris_link_hash_entry
*edir
, *eind
;
2887 edir
= (struct elf_cris_link_hash_entry
*) dir
;
2888 eind
= (struct elf_cris_link_hash_entry
*) ind
;
2890 /* Only indirect symbols are replaced; we're not interested in
2891 updating any of EIND's fields for other symbols. */
2892 if (eind
->root
.root
.type
!= bfd_link_hash_indirect
)
2894 /* Still, we need to copy flags for e.g. weak definitions. */
2895 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2899 BFD_ASSERT (edir
->gotplt_offset
== 0 || eind
->gotplt_offset
== 0);
2901 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
2902 #define XMOVE(F) XMOVOPZ (F, +=, 0)
2903 if (eind
->pcrel_relocs_copied
!= NULL
)
2905 if (edir
->pcrel_relocs_copied
!= NULL
)
2907 struct elf_cris_pcrel_relocs_copied
**pp
;
2908 struct elf_cris_pcrel_relocs_copied
*p
;
2910 /* Add reloc counts against the indirect sym to the direct sym
2911 list. Merge any entries against the same section. */
2912 for (pp
= &eind
->pcrel_relocs_copied
; *pp
!= NULL
;)
2914 struct elf_cris_pcrel_relocs_copied
*q
;
2916 for (q
= edir
->pcrel_relocs_copied
; q
!= NULL
; q
= q
->next
)
2917 if (q
->section
== p
->section
)
2919 q
->count
+= p
->count
;
2926 *pp
= edir
->pcrel_relocs_copied
;
2928 XMOVOPZ (pcrel_relocs_copied
, =, NULL
);
2930 XMOVE (gotplt_refcount
);
2931 XMOVE (gotplt_offset
);
2932 XMOVE (reg_got_refcount
);
2933 XMOVE (tprel_refcount
);
2934 XMOVE (dtp_refcount
);
2938 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2941 /* Look through the relocs for a section during the first phase. */
2944 cris_elf_check_relocs (bfd
*abfd
,
2945 struct bfd_link_info
*info
,
2947 const Elf_Internal_Rela
*relocs
)
2949 struct elf_cris_link_hash_table
* htab
;
2951 Elf_Internal_Shdr
*symtab_hdr
;
2952 struct elf_link_hash_entry
**sym_hashes
;
2953 bfd_signed_vma
*local_got_refcounts
;
2954 const Elf_Internal_Rela
*rel
;
2955 const Elf_Internal_Rela
*rel_end
;
2960 if (bfd_link_relocatable (info
))
2963 htab
= elf_cris_hash_table (info
);
2967 dynobj
= elf_hash_table (info
)->dynobj
;
2968 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2969 sym_hashes
= elf_sym_hashes (abfd
);
2970 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2976 rel_end
= relocs
+ sec
->reloc_count
;
2977 for (rel
= relocs
; rel
< rel_end
; rel
++)
2979 struct elf_link_hash_entry
*h
;
2980 unsigned long r_symndx
;
2981 enum elf_cris_reloc_type r_type
;
2982 bfd_signed_vma got_element_size
= 4;
2983 unsigned long r_symndx_lgot
= INT_MAX
;
2985 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2986 if (r_symndx
< symtab_hdr
->sh_info
)
2989 r_symndx_lgot
= LGOT_REG_NDX (r_symndx
);
2993 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2994 while (h
->root
.type
== bfd_link_hash_indirect
2995 || h
->root
.type
== bfd_link_hash_warning
)
2996 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2999 r_type
= ELF32_R_TYPE (rel
->r_info
);
3001 /* Some relocs require linker-created sections; we need to hang them
3002 on the first input bfd we found that contained dynamic relocs. */
3005 case R_CRIS_32_DTPREL
:
3006 if ((sec
->flags
& SEC_ALLOC
) == 0)
3007 /* This'd be a .dtpreld entry in e.g. debug info. We have
3008 several different switch statements below, but none of
3009 that is needed; we need no preparations for resolving
3010 R_CRIS_32_DTPREL into a non-allocated section (debug
3011 info), so let's just move on to the next
3015 case R_CRIS_16_DTPREL
:
3016 /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3017 entry at index 3. */
3018 if (htab
->dtpmod_refcount
== 0)
3019 htab
->next_gotplt_entry
+= 8;
3021 htab
->dtpmod_refcount
++;
3026 case R_CRIS_16_GOT_GD
:
3027 case R_CRIS_32_GOT_GD
:
3028 case R_CRIS_32_GOT_TPREL
:
3029 case R_CRIS_16_GOT_TPREL
:
3032 case R_CRIS_32_GOTREL
:
3033 case R_CRIS_32_PLT_GOTREL
:
3034 case R_CRIS_32_PLT_PCREL
:
3035 case R_CRIS_16_GOTPLT
:
3036 case R_CRIS_32_GOTPLT
:
3039 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
3041 /* We could handle this if we can get a handle on the
3042 output bfd in elf_cris_adjust_dynamic_symbol. Failing
3043 that, we must insist on dynobj being a specific mach. */
3044 if (bfd_get_mach (dynobj
) == bfd_mach_cris_v10_v32
)
3047 /* xgettext:c-format */
3048 (_("%pB, section %pA:\n v10/v32 compatible object"
3049 " must not contain a PIC relocation"),
3057 /* We may have a dynobj but no .got section, if machine-
3058 independent parts of the linker found a reason to create
3059 a dynobj. We want to create the .got section now, so we
3060 can assume it's always present whenever there's a dynobj.
3061 It's ok to call this function more than once. */
3062 if (!_bfd_elf_create_got_section (dynobj
, info
))
3065 sgot
= elf_hash_table (info
)->sgot
;
3066 srelgot
= elf_hash_table (info
)->srelgot
;
3069 if (local_got_refcounts
== NULL
)
3073 /* We use index local_got_refcounts[-1] to count all
3074 GOT-relative relocations that do not have explicit
3076 amt
= LGOT_ALLOC_NELTS_FOR (symtab_hdr
->sh_info
) + 1;
3077 amt
*= sizeof (bfd_signed_vma
);
3078 local_got_refcounts
= ((bfd_signed_vma
*) bfd_zalloc (abfd
, amt
));
3079 if (local_got_refcounts
== NULL
)
3082 local_got_refcounts
++;
3083 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
3091 /* Warn and error for invalid input. */
3095 case R_CRIS_32_TPREL
:
3096 case R_CRIS_16_TPREL
:
3098 if (bfd_link_pic (info
))
3101 /* xgettext:c-format */
3102 (_("%pB, section %pA:\n relocation %s not valid"
3103 " in a shared object;"
3104 " typically an option mixup, recompile with -fPIC"),
3107 cris_elf_howto_table
[r_type
].name
);
3108 /* Don't return FALSE here; we want messages for all of
3109 these and the error behavior is ungraceful
3119 case R_CRIS_16_GOT_GD
:
3120 case R_CRIS_32_GOT_GD
:
3121 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */
3122 got_element_size
= 8;
3123 r_symndx_lgot
= LGOT_DTP_NDX (r_symndx
);
3126 case R_CRIS_16_DTPREL
:
3127 case R_CRIS_32_DTPREL
:
3128 /* These two just request for the constant-index
3129 module-local tls_index-sized GOT entry, which we add
3134 case R_CRIS_32_GOT_TPREL
:
3135 case R_CRIS_16_GOT_TPREL
:
3136 r_symndx_lgot
= LGOT_TPREL_NDX (r_symndx
);
3138 /* Those relocs also require that a DSO is of type
3139 Initial Exec. Like other targets, we don't reset this
3140 flag even if the relocs are GC:ed away. */
3141 if (bfd_link_pic (info
))
3142 info
->flags
|= DF_STATIC_TLS
;
3145 /* Let's list the other assembler-generated TLS-relocs too,
3146 just to show that they're not forgotten. */
3147 case R_CRIS_16_TPREL
:
3148 case R_CRIS_32_TPREL
:
3155 case R_CRIS_16_GOTPLT
:
3156 case R_CRIS_32_GOTPLT
:
3157 /* Mark that we need a GOT entry if the PLT entry (and its GOT
3158 entry) is eliminated. We can only do this for a non-local
3162 elf_cris_hash_entry (h
)->gotplt_refcount
++;
3163 goto handle_gotplt_reloc
;
3165 /* If h is NULL then this is a local symbol, and we must make a
3166 GOT entry for it, so handle it like a GOT reloc. */
3171 case R_CRIS_16_GOT_GD
:
3172 case R_CRIS_32_GOT_GD
:
3173 case R_CRIS_32_GOT_TPREL
:
3174 case R_CRIS_16_GOT_TPREL
:
3177 /* This symbol requires a global offset table entry. */
3180 if (h
->got
.refcount
== 0)
3182 /* Make sure this symbol is output as a dynamic symbol. */
3183 if (h
->dynindx
== -1)
3185 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
3190 /* Update the sum of reloc counts for this symbol. */
3197 if (elf_cris_hash_entry (h
)->reg_got_refcount
== 0)
3199 /* Allocate space in the .got section. */
3200 sgot
->size
+= got_element_size
;
3201 /* Allocate relocation space. */
3202 srelgot
->size
+= sizeof (Elf32_External_Rela
);
3204 elf_cris_hash_entry (h
)->reg_got_refcount
++;
3208 case R_CRIS_16_GOT_GD
:
3209 case R_CRIS_32_GOT_GD
:
3210 if (elf_cris_hash_entry (h
)->dtp_refcount
== 0)
3212 /* Allocate space in the .got section. */
3213 sgot
->size
+= got_element_size
;
3214 /* Allocate relocation space. */
3215 srelgot
->size
+= sizeof (Elf32_External_Rela
);
3217 elf_cris_hash_entry (h
)->dtp_refcount
++;
3221 case R_CRIS_32_GOT_TPREL
:
3222 case R_CRIS_16_GOT_TPREL
:
3223 if (elf_cris_hash_entry (h
)->tprel_refcount
== 0)
3225 /* Allocate space in the .got section. */
3226 sgot
->size
+= got_element_size
;
3227 /* Allocate relocation space. */
3228 srelgot
->size
+= sizeof (Elf32_External_Rela
);
3230 elf_cris_hash_entry (h
)->tprel_refcount
++;
3240 /* This is a global offset table entry for a local symbol. */
3241 if (local_got_refcounts
[r_symndx_lgot
] == 0)
3243 sgot
->size
+= got_element_size
;
3244 if (bfd_link_pic (info
))
3246 /* If we are generating a shared object, we need
3247 to output a R_CRIS_RELATIVE reloc so that the
3248 dynamic linker can adjust this GOT entry.
3249 Similarly for non-regular got entries. */
3250 srelgot
->size
+= sizeof (Elf32_External_Rela
);
3253 /* Update the reloc-specific count. */
3254 local_got_refcounts
[r_symndx_lgot
]++;
3256 /* This one is the sum of all the others. */
3257 local_got_refcounts
[r_symndx
]++;
3261 case R_CRIS_16_DTPREL
:
3262 case R_CRIS_32_DTPREL
:
3263 case R_CRIS_32_GOTREL
:
3264 /* This reference requires a global offset table.
3265 FIXME: The actual refcount isn't used currently; the .got
3266 section can't be removed if there were any references in the
3268 local_got_refcounts
[-1]++;
3271 handle_gotplt_reloc
:
3273 case R_CRIS_32_PLT_GOTREL
:
3274 /* This reference requires a global offset table. */
3275 local_got_refcounts
[-1]++;
3278 case R_CRIS_32_PLT_PCREL
:
3279 /* This symbol requires a procedure linkage table entry. We
3280 actually build the entry in adjust_dynamic_symbol,
3281 because this might be a case of linking PIC code which is
3282 never referenced by a dynamic object, in which case we
3283 don't need to generate a procedure linkage table entry
3286 /* Beware: if we'd check for visibility of the symbol here
3287 (and not marking the need for a PLT when non-visible), we'd
3288 get into trouble with keeping handling consistent with
3289 regards to relocs found before definition and GOTPLT
3290 handling. Eliminable PLT entries will be dealt with later
3297 /* If the symbol is forced local, the refcount is unavailable. */
3298 if (h
->plt
.refcount
!= -1)
3305 /* Let's help debug shared library creation. Any of these
3306 relocs *can* be used in shared libs, but pages containing
3307 them cannot be shared, so they're not appropriate for
3308 common use. Don't warn for sections we don't care about,
3309 such as debug sections or non-constant sections. We
3310 can't help tables of (global) function pointers, for
3311 example, though they must be emitted in a (writable) data
3312 section to avoid having impure text sections. */
3313 if (bfd_link_pic (info
)
3314 && (sec
->flags
& SEC_ALLOC
) != 0
3315 && (sec
->flags
& SEC_READONLY
) != 0)
3317 /* FIXME: How do we make this optionally a warning only? */
3319 /* xgettext:c-format */
3320 (_("%pB, section %pA:\n relocation %s should not"
3321 " be used in a shared object; recompile with -fPIC"),
3324 cris_elf_howto_table
[r_type
].name
);
3327 /* We don't need to handle relocs into sections not going into
3328 the "real" output. */
3329 if ((sec
->flags
& SEC_ALLOC
) == 0)
3336 /* Make sure a plt entry is created for this symbol if it
3337 turns out to be a function defined by a dynamic object. */
3338 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3342 /* If we are creating a shared library and this is not a local
3343 symbol, we need to copy the reloc into the shared library.
3344 However when linking with -Bsymbolic and this is a global
3345 symbol which is defined in an object we are including in the
3346 link (i.e., DEF_REGULAR is set), then we can resolve the
3347 reloc directly. At this point we have not seen all the input
3348 files, so it is possible that DEF_REGULAR is not set now but
3349 will be set later (it is never cleared). In case of a weak
3350 definition, DEF_REGULAR may be cleared later by a strong
3351 definition in a shared library. We account for that
3352 possibility below by storing information in the relocs_copied
3353 field of the hash table entry. A similar situation occurs
3354 when creating shared libraries and symbol visibility changes
3355 render the symbol local. */
3357 /* No need to do anything if we're not creating a shared object. */
3358 if (! bfd_link_pic (info
)
3359 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
3362 /* We may need to create a reloc section in the dynobj and made room
3366 sreloc
= _bfd_elf_make_dynamic_reloc_section
3367 (sec
, dynobj
, 2, abfd
, /*rela?*/ TRUE
);
3373 if (sec
->flags
& SEC_READONLY
)
3374 info
->flags
|= DF_TEXTREL
;
3376 sreloc
->size
+= sizeof (Elf32_External_Rela
);
3379 case R_CRIS_8_PCREL
:
3380 case R_CRIS_16_PCREL
:
3381 case R_CRIS_32_PCREL
:
3386 /* Make sure a plt entry is created for this symbol if it
3387 turns out to be a function defined by a dynamic object. */
3388 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3392 /* If we are creating a shared library and this is not a local
3393 symbol, we need to copy the reloc into the shared library.
3394 However when linking with -Bsymbolic and this is a global
3395 symbol which is defined in an object we are including in the
3396 link (i.e., DEF_REGULAR is set), then we can resolve the
3397 reloc directly. At this point we have not seen all the input
3398 files, so it is possible that DEF_REGULAR is not set now but
3399 will be set later (it is never cleared). In case of a weak
3400 definition, DEF_REGULAR may be cleared later by a strong
3401 definition in a shared library. We account for that
3402 possibility below by storing information in the relocs_copied
3403 field of the hash table entry. A similar situation occurs
3404 when creating shared libraries and symbol visibility changes
3405 render the symbol local. */
3407 /* No need to do anything if we're not creating a shared object. */
3408 if (! bfd_link_pic (info
))
3411 /* We don't need to handle relocs into sections not going into
3412 the "real" output. */
3413 if ((sec
->flags
& SEC_ALLOC
) == 0)
3416 /* If the symbol is local, then we know already we can
3417 eliminate the reloc. */
3418 if (h
== NULL
|| ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
3421 /* If this is with -Bsymbolic and the symbol isn't weak, and
3422 is defined by an ordinary object (the ones we include in
3423 this shared library) then we can also eliminate the
3424 reloc. See comment above for more eliminable cases which
3425 we can't identify at this time. */
3426 if (SYMBOLIC_BIND (info
, h
)
3427 && h
->root
.type
!= bfd_link_hash_defweak
3431 /* We may need to create a reloc section in the dynobj and made room
3435 sreloc
= _bfd_elf_make_dynamic_reloc_section
3436 (sec
, dynobj
, 2, abfd
, /*rela?*/ TRUE
);
3442 sreloc
->size
+= sizeof (Elf32_External_Rela
);
3444 /* We count the number of PC relative relocations we have
3445 entered for this symbol, so that we can discard them
3446 again if the symbol is later defined by a regular object.
3447 We know that h is really a pointer to an
3448 elf_cris_link_hash_entry. */
3450 struct elf_cris_link_hash_entry
*eh
;
3451 struct elf_cris_pcrel_relocs_copied
*p
;
3453 eh
= elf_cris_hash_entry (h
);
3455 for (p
= eh
->pcrel_relocs_copied
; p
!= NULL
; p
= p
->next
)
3456 if (p
->section
== sec
)
3461 p
= ((struct elf_cris_pcrel_relocs_copied
*)
3462 bfd_alloc (dynobj
, (bfd_size_type
) sizeof *p
));
3465 p
->next
= eh
->pcrel_relocs_copied
;
3466 eh
->pcrel_relocs_copied
= p
;
3476 /* This relocation describes the C++ object vtable hierarchy.
3477 Reconstruct it for later use during GC. */
3478 case R_CRIS_GNU_VTINHERIT
:
3479 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
3483 /* This relocation describes which C++ vtable entries are actually
3484 used. Record for later use during GC. */
3485 case R_CRIS_GNU_VTENTRY
:
3486 BFD_ASSERT (h
!= NULL
);
3488 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
3492 case R_CRIS_16_TPREL
:
3493 case R_CRIS_32_TPREL
:
3494 /* Already warned above, when necessary. */
3498 /* Other relocs do not appear here. */
3499 bfd_set_error (bfd_error_bad_value
);
3507 /* Set the sizes of the dynamic sections. */
3510 elf_cris_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3511 struct bfd_link_info
*info
)
3513 struct elf_cris_link_hash_table
* htab
;
3519 htab
= elf_cris_hash_table (info
);
3523 dynobj
= htab
->root
.dynobj
;
3524 BFD_ASSERT (dynobj
!= NULL
);
3526 if (htab
->root
.dynamic_sections_created
)
3528 /* Set the contents of the .interp section to the interpreter. */
3529 if (bfd_link_executable (info
) && !info
->nointerp
)
3531 s
= bfd_get_linker_section (dynobj
, ".interp");
3532 BFD_ASSERT (s
!= NULL
);
3533 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
3534 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
3539 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */
3540 elf_cris_link_hash_traverse (htab
, elf_cris_adjust_gotplt_to_got
,
3543 /* We may have created entries in the .rela.got section.
3544 However, if we are not creating the dynamic sections, we will
3545 not actually use these entries. Reset the size of .rela.got,
3546 which will cause it to get stripped from the output file
3548 s
= htab
->root
.srelgot
;
3553 /* If this is a -Bsymbolic shared link, then we need to discard all PC
3554 relative relocs against symbols defined in a regular object. We
3555 allocated space for them in the check_relocs routine, but we will not
3556 fill them in in the relocate_section routine. We also discard space
3557 for relocs that have become for local symbols due to symbol
3558 visibility changes. For programs, we discard space for relocs for
3559 symbols not referenced by any dynamic object. */
3560 if (bfd_link_pic (info
))
3561 elf_cris_link_hash_traverse (htab
,
3562 elf_cris_discard_excess_dso_dynamics
,
3565 elf_cris_link_hash_traverse (htab
,
3566 elf_cris_discard_excess_program_dynamics
,
3569 /* The check_relocs and adjust_dynamic_symbol entry points have
3570 determined the sizes of the various dynamic sections. Allocate
3574 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3578 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3581 /* It's OK to base decisions on the section name, because none
3582 of the dynobj section names depend upon the input files. */
3583 name
= bfd_get_section_name (dynobj
, s
);
3585 if (strcmp (name
, ".plt") == 0)
3587 /* Remember whether there is a PLT. */
3590 else if (strcmp (name
, ".got.plt") == 0)
3592 /* The .got.plt contains the .got header as well as the
3593 actual .got.plt contents. The .got header may contain a
3594 R_CRIS_DTPMOD entry at index 3. */
3595 s
->size
+= htab
->dtpmod_refcount
!= 0
3598 else if (CONST_STRNEQ (name
, ".rela"))
3600 if (strcmp (name
, ".rela.got") == 0
3601 && htab
->dtpmod_refcount
!= 0
3602 && bfd_link_pic (info
))
3603 s
->size
+= sizeof (Elf32_External_Rela
);
3607 /* Remember whether there are any reloc sections other
3609 if (strcmp (name
, ".rela.plt") != 0)
3612 /* We use the reloc_count field as a counter if we need
3613 to copy relocs into the output file. */
3617 else if (! CONST_STRNEQ (name
, ".got")
3618 && strcmp (name
, ".dynbss") != 0
3619 && s
!= htab
->root
.sdynrelro
)
3621 /* It's not one of our sections, so don't allocate space. */
3627 /* If we don't need this section, strip it from the
3628 output file. This is mostly to handle .rela.bss and
3629 .rela.plt. We must create both sections in
3630 create_dynamic_sections, because they must be created
3631 before the linker maps input sections to output
3632 sections. The linker does that before
3633 adjust_dynamic_symbol is called, and it is that
3634 function which decides whether anything needs to go
3635 into these sections. */
3636 s
->flags
|= SEC_EXCLUDE
;
3640 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3643 /* Allocate memory for the section contents. We use bfd_zalloc here
3644 in case unused entries are not reclaimed before the section's
3645 contents are written out. This should not happen, but this way
3646 if it does, we will not write out garbage. For reloc sections,
3647 this will make entries have the type R_CRIS_NONE. */
3648 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3649 if (s
->contents
== NULL
)
3653 if (elf_hash_table (info
)->dynamic_sections_created
)
3655 /* Add some entries to the .dynamic section. We fill in the
3656 values later, in elf_cris_finish_dynamic_sections, but we
3657 must add the entries now so that we get the correct size for
3658 the .dynamic section. The DT_DEBUG entry is filled in by the
3659 dynamic linker and used by the debugger. */
3660 #define add_dynamic_entry(TAG, VAL) \
3661 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3663 if (!bfd_link_pic (info
))
3665 if (!add_dynamic_entry (DT_DEBUG
, 0))
3671 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3672 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3673 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3674 || !add_dynamic_entry (DT_JMPREL
, 0))
3680 if (!add_dynamic_entry (DT_RELA
, 0)
3681 || !add_dynamic_entry (DT_RELASZ
, 0)
3682 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3686 if ((info
->flags
& DF_TEXTREL
) != 0)
3688 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3690 info
->flags
|= DF_TEXTREL
;
3693 #undef add_dynamic_entry
3698 /* This function is called via elf_cris_link_hash_traverse if we are
3699 creating a shared object. In the -Bsymbolic case, it discards the
3700 space allocated to copy PC relative relocs against symbols which
3701 are defined in regular objects. For the normal non-symbolic case,
3702 we also discard space for relocs that have become local due to
3703 symbol visibility changes. We allocated space for them in the
3704 check_relocs routine, but we won't fill them in in the
3705 relocate_section routine. */
3708 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry
*h
,
3711 struct elf_cris_pcrel_relocs_copied
*s
;
3712 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3714 /* If a symbol has been forced local or we have found a regular
3715 definition for the symbolic link case, then we won't be needing
3717 if (h
->root
.def_regular
3718 && (h
->root
.forced_local
3719 || SYMBOLIC_BIND (info
, &h
->root
)))
3721 for (s
= h
->pcrel_relocs_copied
; s
!= NULL
; s
= s
->next
)
3724 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info
)
3728 sreloc
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
3733 /* If we have accounted for PC-relative relocs for read-only
3734 sections, now is the time to warn for them. We can't do it in
3735 cris_elf_check_relocs, because we don't know the status of all
3736 symbols at that time (and it's common to force symbols local
3739 for (s
= h
->pcrel_relocs_copied
; s
!= NULL
; s
= s
->next
)
3740 if ((s
->section
->flags
& SEC_READONLY
) != 0)
3742 /* FIXME: How do we make this optionally a warning only? */
3744 /* xgettext:c-format */
3745 (_("%pB, section `%pA', to symbol `%s':\n"
3746 " relocation %s should not be used"
3747 " in a shared object; recompile with -fPIC"),
3750 h
->root
.root
.root
.string
,
3751 cris_elf_howto_table
[s
->r_type
].name
);
3753 info
->flags
|= DF_TEXTREL
;
3759 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3760 creating a shared object. We discard space for relocs for symbols put
3761 in the .got, but which we found we do not have to resolve at run-time. */
3764 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry
*h
,
3767 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3769 /* If we're not creating a shared library and have a symbol which is
3770 referred to by .got references, but the symbol is defined locally,
3771 (or rather, not defined by a DSO) then lose the reloc for the .got
3772 (don't allocate room for it). Likewise for relocs for something
3773 for which we create a PLT. */
3774 if (!h
->root
.def_dynamic
3775 || h
->root
.plt
.refcount
> 0)
3777 if (h
->reg_got_refcount
> 0
3778 /* The size of this section is only valid and in sync with the
3779 various reference counts if we do dynamic; don't decrement it
3781 && elf_hash_table (info
)->dynamic_sections_created
)
3783 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
3784 asection
*srelgot
= elf_hash_table (info
)->srelgot
;
3786 BFD_ASSERT (dynobj
!= NULL
);
3787 BFD_ASSERT (srelgot
!= NULL
);
3789 srelgot
->size
-= sizeof (Elf32_External_Rela
);
3792 /* If the locally-defined symbol isn't used by a DSO, then we don't
3793 have to export it as a dynamic symbol. This was already done for
3794 functions; doing this for all symbols would presumably not
3795 introduce new problems. Of course we don't do this if we're
3796 exporting all dynamic symbols, or all data symbols, regardless of
3797 them being referenced or not. */
3798 if (! (info
->export_dynamic
3799 || (h
->root
.type
!= STT_FUNC
&& info
->dynamic_data
))
3800 && h
->root
.dynindx
!= -1
3802 && !h
->root
.def_dynamic
3803 && !h
->root
.ref_dynamic
)
3805 h
->root
.dynindx
= -1;
3806 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
3807 h
->root
.dynstr_index
);
3814 /* Reject a file depending on presence and expectation of prefixed
3815 underscores on symbols. */
3818 cris_elf_object_p (bfd
*abfd
)
3820 if (! cris_elf_set_mach_from_flags (abfd
, elf_elfheader (abfd
)->e_flags
))
3823 if ((elf_elfheader (abfd
)->e_flags
& EF_CRIS_UNDERSCORE
))
3824 return (bfd_get_symbol_leading_char (abfd
) == '_');
3826 return (bfd_get_symbol_leading_char (abfd
) == 0);
3829 /* Mark presence or absence of leading underscore. Set machine type
3830 flags from mach type. */
3833 cris_elf_final_write_processing (bfd
*abfd
,
3834 bfd_boolean linker ATTRIBUTE_UNUSED
)
3836 unsigned long e_flags
= elf_elfheader (abfd
)->e_flags
;
3838 e_flags
&= ~EF_CRIS_UNDERSCORE
;
3839 if (bfd_get_symbol_leading_char (abfd
) == '_')
3840 e_flags
|= EF_CRIS_UNDERSCORE
;
3842 switch (bfd_get_mach (abfd
))
3844 case bfd_mach_cris_v0_v10
:
3845 e_flags
|= EF_CRIS_VARIANT_ANY_V0_V10
;
3848 case bfd_mach_cris_v10_v32
:
3849 e_flags
|= EF_CRIS_VARIANT_COMMON_V10_V32
;
3852 case bfd_mach_cris_v32
:
3853 e_flags
|= EF_CRIS_VARIANT_V32
;
3857 _bfd_abort (__FILE__
, __LINE__
,
3858 _("Unexpected machine number"));
3861 elf_elfheader (abfd
)->e_flags
= e_flags
;
3864 /* Set the mach type from e_flags value. */
3867 cris_elf_set_mach_from_flags (bfd
*abfd
,
3868 unsigned long flags
)
3870 switch (flags
& EF_CRIS_VARIANT_MASK
)
3872 case EF_CRIS_VARIANT_ANY_V0_V10
:
3873 bfd_default_set_arch_mach (abfd
, bfd_arch_cris
, bfd_mach_cris_v0_v10
);
3876 case EF_CRIS_VARIANT_V32
:
3877 bfd_default_set_arch_mach (abfd
, bfd_arch_cris
, bfd_mach_cris_v32
);
3880 case EF_CRIS_VARIANT_COMMON_V10_V32
:
3881 bfd_default_set_arch_mach (abfd
, bfd_arch_cris
, bfd_mach_cris_v10_v32
);
3885 /* Since we don't recognize them, we obviously can't support them
3886 with this code; we'd have to require that all future handling
3887 would be optional. */
3888 bfd_set_error (bfd_error_wrong_format
);
3895 /* Display the flags field. */
3898 cris_elf_print_private_bfd_data (bfd
*abfd
, void * ptr
)
3900 FILE *file
= (FILE *) ptr
;
3902 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
3904 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
3906 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
3908 if (elf_elfheader (abfd
)->e_flags
& EF_CRIS_UNDERSCORE
)
3909 fprintf (file
, _(" [symbols have a _ prefix]"));
3910 if ((elf_elfheader (abfd
)->e_flags
& EF_CRIS_VARIANT_MASK
)
3911 == EF_CRIS_VARIANT_COMMON_V10_V32
)
3912 fprintf (file
, _(" [v10 and v32]"));
3913 if ((elf_elfheader (abfd
)->e_flags
& EF_CRIS_VARIANT_MASK
)
3914 == EF_CRIS_VARIANT_V32
)
3915 fprintf (file
, _(" [v32]"));
3921 /* Don't mix files with and without a leading underscore. */
3924 cris_elf_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
3926 bfd
*obfd
= info
->output_bfd
;
3929 if (! _bfd_generic_verify_endian_match (ibfd
, info
))
3932 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3933 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3936 imach
= bfd_get_mach (ibfd
);
3938 if (! elf_flags_init (obfd
))
3940 /* This happens when ld starts out with a 'blank' output file. */
3941 elf_flags_init (obfd
) = TRUE
;
3943 /* We ignore the linker-set mach, and instead set it according to
3944 the first input file. This would also happen if we could
3945 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3946 This allows us to keep the same linker config across
3947 cris(v0..v10) and crisv32. The drawback is that we can't force
3948 the output type, which might be a sane thing to do for a
3949 v10+v32 compatibility object. */
3950 if (! bfd_set_arch_mach (obfd
, bfd_arch_cris
, imach
))
3954 if (bfd_get_symbol_leading_char (ibfd
)
3955 != bfd_get_symbol_leading_char (obfd
))
3958 (bfd_get_symbol_leading_char (ibfd
) == '_'
3959 ? _("%pB: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3960 : _("%pB: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3962 bfd_set_error (bfd_error_bad_value
);
3966 omach
= bfd_get_mach (obfd
);
3970 /* We can get an incompatible combination only if either is
3971 bfd_mach_cris_v32, and the other one isn't compatible. */
3972 if ((imach
== bfd_mach_cris_v32
3973 && omach
!= bfd_mach_cris_v10_v32
)
3974 || (omach
== bfd_mach_cris_v32
3975 && imach
!= bfd_mach_cris_v10_v32
))
3978 ((imach
== bfd_mach_cris_v32
)
3979 ? _("%pB contains CRIS v32 code, incompatible"
3980 " with previous objects")
3981 : _("%pB contains non-CRIS-v32 code, incompatible"
3982 " with previous objects"),
3984 bfd_set_error (bfd_error_bad_value
);
3988 /* We don't have to check the case where the input is compatible
3989 with v10 and v32, because the output is already known to be set
3990 to the other (compatible) mach. */
3991 if (omach
== bfd_mach_cris_v10_v32
3992 && ! bfd_set_arch_mach (obfd
, bfd_arch_cris
, imach
))
3999 /* Do side-effects of e_flags copying to obfd. */
4002 cris_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4004 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4005 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4008 /* Call the base function. */
4009 if (!_bfd_elf_copy_private_bfd_data (ibfd
, obfd
))
4012 /* Do what we really came here for. */
4013 return bfd_set_arch_mach (obfd
, bfd_arch_cris
, bfd_get_mach (ibfd
));
4016 static enum elf_reloc_type_class
4017 elf_cris_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4018 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4019 const Elf_Internal_Rela
*rela
)
4021 enum elf_cris_reloc_type r_type
= ELF32_R_TYPE (rela
->r_info
);
4024 case R_CRIS_RELATIVE
:
4025 return reloc_class_relative
;
4026 case R_CRIS_JUMP_SLOT
:
4027 return reloc_class_plt
;
4029 return reloc_class_copy
;
4031 return reloc_class_normal
;
4035 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to
4036 two GOT entries from three types with two different sizes. We handle
4037 it as a single entry, so we can use the regular offset-calculation
4041 elf_cris_got_elt_size (bfd
*abfd ATTRIBUTE_UNUSED
,
4042 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4043 struct elf_link_hash_entry
*hr
,
4045 unsigned long symndx
)
4047 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) hr
;
4050 /* We may have one regular GOT entry or up to two TLS GOT
4054 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
4055 bfd_signed_vma
*local_got_refcounts
= elf_local_got_refcounts (ibfd
);
4057 BFD_ASSERT (local_got_refcounts
!= NULL
);
4059 if (local_got_refcounts
[LGOT_REG_NDX (symndx
)] > 0)
4061 /* We can't have a variable referred to both as a regular
4062 variable and through TLS relocs. */
4063 BFD_ASSERT (local_got_refcounts
[LGOT_DTP_NDX (symndx
)] == 0
4064 && local_got_refcounts
[LGOT_TPREL_NDX (symndx
)] == 0);
4068 if (local_got_refcounts
[LGOT_DTP_NDX (symndx
)] > 0)
4071 if (local_got_refcounts
[LGOT_TPREL_NDX (symndx
)] > 0)
4076 struct elf_cris_link_hash_entry
*hh
= elf_cris_hash_entry (h
);
4077 if (hh
->reg_got_refcount
> 0)
4079 /* The actual error-on-input is emitted elsewhere. */
4080 BFD_ASSERT (hh
->dtp_refcount
== 0 && hh
->tprel_refcount
== 0);
4084 if (hh
->dtp_refcount
> 0)
4087 if (hh
->tprel_refcount
> 0)
4091 /* We're only called when h->got.refcount is non-zero, so we must
4092 have a non-zero size. */
4093 BFD_ASSERT (eltsiz
!= 0);
4097 #define ELF_ARCH bfd_arch_cris
4098 #define ELF_TARGET_ID CRIS_ELF_DATA
4099 #define ELF_MACHINE_CODE EM_CRIS
4100 #define ELF_MAXPAGESIZE 0x2000
4102 #define TARGET_LITTLE_SYM cris_elf32_vec
4103 #define TARGET_LITTLE_NAME "elf32-cris"
4104 #define elf_symbol_leading_char 0
4106 #define elf_info_to_howto_rel NULL
4107 #define elf_info_to_howto cris_info_to_howto_rela
4108 #define elf_backend_relocate_section cris_elf_relocate_section
4109 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
4110 #define elf_backend_plt_sym_val cris_elf_plt_sym_val
4111 #define elf_backend_check_relocs cris_elf_check_relocs
4112 #define elf_backend_grok_prstatus cris_elf_grok_prstatus
4113 #define elf_backend_grok_psinfo cris_elf_grok_psinfo
4115 #define elf_backend_can_gc_sections 1
4116 #define elf_backend_can_refcount 1
4118 #define elf_backend_object_p cris_elf_object_p
4119 #define elf_backend_final_write_processing \
4120 cris_elf_final_write_processing
4121 #define bfd_elf32_bfd_print_private_bfd_data \
4122 cris_elf_print_private_bfd_data
4123 #define bfd_elf32_bfd_merge_private_bfd_data \
4124 cris_elf_merge_private_bfd_data
4125 #define bfd_elf32_bfd_copy_private_bfd_data \
4126 cris_elf_copy_private_bfd_data
4128 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
4129 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4131 #define bfd_elf32_bfd_link_hash_table_create \
4132 elf_cris_link_hash_table_create
4133 #define elf_backend_adjust_dynamic_symbol \
4134 elf_cris_adjust_dynamic_symbol
4135 #define elf_backend_copy_indirect_symbol \
4136 elf_cris_copy_indirect_symbol
4137 #define elf_backend_size_dynamic_sections \
4138 elf_cris_size_dynamic_sections
4139 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4140 #define elf_backend_finish_dynamic_symbol \
4141 elf_cris_finish_dynamic_symbol
4142 #define elf_backend_finish_dynamic_sections \
4143 elf_cris_finish_dynamic_sections
4144 #define elf_backend_create_dynamic_sections \
4145 _bfd_elf_create_dynamic_sections
4146 #define bfd_elf32_bfd_final_link \
4147 bfd_elf_gc_common_final_link
4148 #define elf_backend_hide_symbol elf_cris_hide_symbol
4149 #define elf_backend_reloc_type_class elf_cris_reloc_type_class
4151 #define elf_backend_want_got_plt 1
4152 #define elf_backend_plt_readonly 1
4153 #define elf_backend_want_plt_sym 0
4154 #define elf_backend_got_header_size 12
4155 #define elf_backend_got_elt_size elf_cris_got_elt_size
4156 #define elf_backend_dtrel_excludes_plt 1
4157 #define elf_backend_want_dynrelro 1
4159 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4160 linking and libraries (if it's a win of any significance). Until then,
4161 take the easy route. */
4162 #define elf_backend_may_use_rel_p 0
4163 #define elf_backend_may_use_rela_p 1
4164 #define elf_backend_rela_normal 1
4166 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4168 #include "elf32-target.h"
4170 #undef TARGET_LITTLE_SYM
4171 #undef TARGET_LITTLE_NAME
4172 #undef elf_symbol_leading_char
4174 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4175 #define TARGET_LITTLE_NAME "elf32-us-cris"
4176 #define elf_symbol_leading_char '_'
4178 #define elf32_bed elf32_us_cris_bed
4180 #include "elf32-target.h"