1 /* Lattice Mico32-specific support for 32-bit ELF
2 Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
3 Contributed by Jon Beniston <jon@beniston.com>
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #define DEFAULT_STACK_SIZE 0x20000
30 #define PLT_ENTRY_SIZE 20
32 #define PLT0_ENTRY_WORD0 0
33 #define PLT0_ENTRY_WORD1 0
34 #define PLT0_ENTRY_WORD2 0
35 #define PLT0_ENTRY_WORD3 0
36 #define PLT0_ENTRY_WORD4 0
38 #define PLT0_PIC_ENTRY_WORD0 0
39 #define PLT0_PIC_ENTRY_WORD1 0
40 #define PLT0_PIC_ENTRY_WORD2 0
41 #define PLT0_PIC_ENTRY_WORD3 0
42 #define PLT0_PIC_ENTRY_WORD4 0
44 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
46 extern const bfd_target bfd_elf32_lm32fdpic_vec
;
48 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_lm32fdpic_vec)
50 static bfd_reloc_status_type lm32_elf_gprel_reloc
51 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
53 /* The linker needs to keep track of the number of relocs that it
54 decides to copy as dynamic relocs in check_relocs for each symbol.
55 This is so that it can later discard them if they are found to be
56 unnecessary. We store the information in a field extending the
57 regular ELF linker hash table. */
59 struct elf_lm32_dyn_relocs
61 struct elf_lm32_dyn_relocs
*next
;
63 /* The input section of the reloc. */
66 /* Total number of relocs copied for the input section. */
69 /* Number of pc-relative relocs copied for the input section. */
70 bfd_size_type pc_count
;
73 /* lm32 ELF linker hash entry. */
75 struct elf_lm32_link_hash_entry
77 struct elf_link_hash_entry root
;
79 /* Track dynamic relocs copied for this symbol. */
80 struct elf_lm32_dyn_relocs
*dyn_relocs
;
83 /* lm32 ELF linker hash table. */
85 struct elf_lm32_link_hash_table
87 struct elf_link_hash_table root
;
89 /* Short-cuts to get to dynamic linker sections. */
102 /* Get the lm32 ELF linker hash table from a link_info structure. */
104 #define lm32_elf_hash_table(p) \
105 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
106 == LM32_ELF_DATA ? ((struct elf_lm32_link_hash_table *) ((p)->hash)) : NULL)
108 #define lm32fdpic_got_section(info) \
109 (lm32_elf_hash_table (info)->sgot)
110 #define lm32fdpic_gotrel_section(info) \
111 (lm32_elf_hash_table (info)->srelgot)
112 #define lm32fdpic_fixup32_section(info) \
113 (lm32_elf_hash_table (info)->sfixup32)
115 struct weak_symbol_list
118 struct weak_symbol_list
*next
;
121 /* Create an entry in an lm32 ELF linker hash table. */
123 static struct bfd_hash_entry
*
124 lm32_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
125 struct bfd_hash_table
*table
,
128 struct elf_lm32_link_hash_entry
*ret
=
129 (struct elf_lm32_link_hash_entry
*) entry
;
131 /* Allocate the structure if it has not already been allocated by a
134 ret
= bfd_hash_allocate (table
,
135 sizeof (struct elf_lm32_link_hash_entry
));
139 /* Call the allocation method of the superclass. */
140 ret
= ((struct elf_lm32_link_hash_entry
*)
141 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
145 struct elf_lm32_link_hash_entry
*eh
;
147 eh
= (struct elf_lm32_link_hash_entry
*) ret
;
148 eh
->dyn_relocs
= NULL
;
151 return (struct bfd_hash_entry
*) ret
;
154 /* Create an lm32 ELF linker hash table. */
156 static struct bfd_link_hash_table
*
157 lm32_elf_link_hash_table_create (bfd
*abfd
)
159 struct elf_lm32_link_hash_table
*ret
;
160 bfd_size_type amt
= sizeof (struct elf_lm32_link_hash_table
);
162 ret
= bfd_zmalloc (amt
);
166 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
167 lm32_elf_link_hash_newfunc
,
168 sizeof (struct elf_lm32_link_hash_entry
),
175 return &ret
->root
.root
;
178 /* Add a fixup to the ROFIXUP section. */
181 _lm32fdpic_add_rofixup (bfd
*output_bfd
, asection
*rofixup
, bfd_vma relocation
)
183 bfd_vma fixup_offset
;
185 if (rofixup
->flags
& SEC_EXCLUDE
)
188 fixup_offset
= rofixup
->reloc_count
* 4;
189 if (rofixup
->contents
)
191 BFD_ASSERT (fixup_offset
< rofixup
->size
);
192 if (fixup_offset
< rofixup
->size
)
193 bfd_put_32 (output_bfd
, relocation
, rofixup
->contents
+ fixup_offset
);
195 rofixup
->reloc_count
++;
200 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
201 shortcuts to them in our hash table. */
204 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
206 struct elf_lm32_link_hash_table
*htab
;
209 /* This function may be called more than once. */
210 s
= bfd_get_linker_section (dynobj
, ".got");
214 htab
= lm32_elf_hash_table (info
);
218 if (! _bfd_elf_create_got_section (dynobj
, info
))
221 htab
->sgot
= bfd_get_linker_section (dynobj
, ".got");
222 htab
->sgotplt
= bfd_get_linker_section (dynobj
, ".got.plt");
223 htab
->srelgot
= bfd_get_linker_section (dynobj
, ".rela.got");
224 if (! htab
->sgot
|| ! htab
->sgotplt
|| ! htab
->srelgot
)
230 /* Create .rofixup sections in DYNOBJ, and set up
231 shortcuts to them in our hash table. */
234 create_rofixup_section (bfd
*dynobj
, struct bfd_link_info
*info
)
236 struct elf_lm32_link_hash_table
*htab
;
237 htab
= lm32_elf_hash_table (info
);
242 /* Fixup section for R_LM32_32 relocs. */
243 lm32fdpic_fixup32_section (info
)
244 = bfd_make_section_anyway_with_flags (dynobj
,
252 if (lm32fdpic_fixup32_section (info
) == NULL
253 || ! bfd_set_section_alignment (dynobj
,
254 lm32fdpic_fixup32_section (info
), 2))
260 static reloc_howto_type lm32_elf_howto_table
[] =
262 /* This reloc does nothing. */
263 HOWTO (R_LM32_NONE
, /* type */
265 2, /* size (0 = byte, 1 = short, 2 = long) */
267 FALSE
, /* pc_relative */
269 complain_overflow_bitfield
,/* complain_on_overflow */
270 bfd_elf_generic_reloc
, /* special_function */
271 "R_LM32_NONE", /* name */
272 FALSE
, /* partial_inplace */
275 FALSE
), /* pcrel_offset */
277 /* An 8 bit absolute relocation. */
278 HOWTO (R_LM32_8
, /* type */
280 0, /* size (0 = byte, 1 = short, 2 = long) */
282 FALSE
, /* pc_relative */
284 complain_overflow_bitfield
,/* complain_on_overflow */
285 bfd_elf_generic_reloc
, /* special_function */
286 "R_LM32_8", /* name */
287 FALSE
, /* partial_inplace */
290 FALSE
), /* pcrel_offset */
292 /* A 16 bit absolute relocation. */
293 HOWTO (R_LM32_16
, /* type */
295 1, /* size (0 = byte, 1 = short, 2 = long) */
297 FALSE
, /* pc_relative */
299 complain_overflow_bitfield
,/* complain_on_overflow */
300 bfd_elf_generic_reloc
, /* special_function */
301 "R_LM32_16", /* name */
302 FALSE
, /* partial_inplace */
304 0xffff, /* dst_mask */
305 FALSE
), /* pcrel_offset */
307 /* A 32 bit absolute relocation. */
308 HOWTO (R_LM32_32
, /* type */
310 2, /* size (0 = byte, 1 = short, 2 = long) */
312 FALSE
, /* pc_relative */
314 complain_overflow_bitfield
,/* complain_on_overflow */
315 bfd_elf_generic_reloc
, /* special_function */
316 "R_LM32_32", /* name */
317 FALSE
, /* partial_inplace */
319 0xffffffff, /* dst_mask */
320 FALSE
), /* pcrel_offset */
322 HOWTO (R_LM32_HI16
, /* type */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
326 FALSE
, /* pc_relative */
328 complain_overflow_bitfield
,/* complain_on_overflow */
329 bfd_elf_generic_reloc
, /* special_function */
330 "R_LM32_HI16", /* name */
331 FALSE
, /* partial_inplace */
333 0xffff, /* dst_mask */
334 FALSE
), /* pcrel_offset */
336 HOWTO (R_LM32_LO16
, /* type */
338 2, /* size (0 = byte, 1 = short, 2 = long) */
340 FALSE
, /* pc_relative */
342 complain_overflow_dont
, /* complain_on_overflow */
343 bfd_elf_generic_reloc
, /* special_function */
344 "R_LM32_LO16", /* name */
345 FALSE
, /* partial_inplace */
347 0xffff, /* dst_mask */
348 FALSE
), /* pcrel_offset */
350 HOWTO (R_LM32_GPREL16
, /* type */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
354 FALSE
, /* pc_relative */
356 complain_overflow_dont
, /* complain_on_overflow */
357 lm32_elf_gprel_reloc
, /* special_function */
358 "R_LM32_GPREL16", /* name */
359 FALSE
, /* partial_inplace */
361 0xffff, /* dst_mask */
362 FALSE
), /* pcrel_offset */
364 HOWTO (R_LM32_CALL
, /* type */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
368 TRUE
, /* pc_relative */
370 complain_overflow_signed
, /* complain_on_overflow */
371 bfd_elf_generic_reloc
, /* special_function */
372 "R_LM32_CALL", /* name */
373 FALSE
, /* partial_inplace */
375 0x3ffffff, /* dst_mask */
376 TRUE
), /* pcrel_offset */
378 HOWTO (R_LM32_BRANCH
, /* type */
380 2, /* size (0 = byte, 1 = short, 2 = long) */
382 TRUE
, /* pc_relative */
384 complain_overflow_signed
, /* complain_on_overflow */
385 bfd_elf_generic_reloc
, /* special_function */
386 "R_LM32_BRANCH", /* name */
387 FALSE
, /* partial_inplace */
389 0xffff, /* dst_mask */
390 TRUE
), /* pcrel_offset */
392 /* GNU extension to record C++ vtable hierarchy. */
393 HOWTO (R_LM32_GNU_VTINHERIT
, /* type */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
397 FALSE
, /* pc_relative */
399 complain_overflow_dont
, /* complain_on_overflow */
400 NULL
, /* special_function */
401 "R_LM32_GNU_VTINHERIT", /* name */
402 FALSE
, /* partial_inplace */
405 FALSE
), /* pcrel_offset */
407 /* GNU extension to record C++ vtable member usage. */
408 HOWTO (R_LM32_GNU_VTENTRY
, /* type */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
412 FALSE
, /* pc_relative */
414 complain_overflow_dont
, /* complain_on_overflow */
415 _bfd_elf_rel_vtable_reloc_fn
,/* special_function */
416 "R_LM32_GNU_VTENTRY", /* name */
417 FALSE
, /* partial_inplace */
420 FALSE
), /* pcrel_offset */
422 HOWTO (R_LM32_16_GOT
, /* type */
424 2, /* size (0 = byte, 1 = short, 2 = long) */
426 FALSE
, /* pc_relative */
428 complain_overflow_signed
, /* complain_on_overflow */
429 bfd_elf_generic_reloc
, /* special_function */
430 "R_LM32_16_GOT", /* name */
431 FALSE
, /* partial_inplace */
433 0xffff, /* dst_mask */
434 FALSE
), /* pcrel_offset */
436 HOWTO (R_LM32_GOTOFF_HI16
, /* type */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 FALSE
, /* pc_relative */
442 complain_overflow_dont
, /* complain_on_overflow */
443 bfd_elf_generic_reloc
, /* special_function */
444 "R_LM32_GOTOFF_HI16", /* name */
445 FALSE
, /* partial_inplace */
446 0xffff, /* src_mask */
447 0xffff, /* dst_mask */
448 FALSE
), /* pcrel_offset */
450 HOWTO (R_LM32_GOTOFF_LO16
, /* type */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
454 FALSE
, /* pc_relative */
456 complain_overflow_dont
, /* complain_on_overflow */
457 bfd_elf_generic_reloc
, /* special_function */
458 "R_LM32_GOTOFF_LO16", /* name */
459 FALSE
, /* partial_inplace */
460 0xffff, /* src_mask */
461 0xffff, /* dst_mask */
462 FALSE
), /* pcrel_offset */
464 HOWTO (R_LM32_COPY
, /* type */
466 2, /* size (0 = byte, 1 = short, 2 = long) */
468 FALSE
, /* pc_relative */
470 complain_overflow_bitfield
, /* complain_on_overflow */
471 bfd_elf_generic_reloc
, /* special_function */
472 "R_LM32_COPY", /* name */
473 FALSE
, /* partial_inplace */
474 0xffffffff, /* src_mask */
475 0xffffffff, /* dst_mask */
476 FALSE
), /* pcrel_offset */
478 HOWTO (R_LM32_GLOB_DAT
, /* type */
480 2, /* size (0 = byte, 1 = short, 2 = long) */
482 FALSE
, /* pc_relative */
484 complain_overflow_bitfield
, /* complain_on_overflow */
485 bfd_elf_generic_reloc
, /* special_function */
486 "R_LM32_GLOB_DAT", /* name */
487 FALSE
, /* partial_inplace */
488 0xffffffff, /* src_mask */
489 0xffffffff, /* dst_mask */
490 FALSE
), /* pcrel_offset */
492 HOWTO (R_LM32_JMP_SLOT
, /* type */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
496 FALSE
, /* pc_relative */
498 complain_overflow_bitfield
, /* complain_on_overflow */
499 bfd_elf_generic_reloc
, /* special_function */
500 "R_LM32_JMP_SLOT", /* name */
501 FALSE
, /* partial_inplace */
502 0xffffffff, /* src_mask */
503 0xffffffff, /* dst_mask */
504 FALSE
), /* pcrel_offset */
506 HOWTO (R_LM32_RELATIVE
, /* type */
508 2, /* size (0 = byte, 1 = short, 2 = long) */
510 FALSE
, /* pc_relative */
512 complain_overflow_bitfield
, /* complain_on_overflow */
513 bfd_elf_generic_reloc
, /* special_function */
514 "R_LM32_RELATIVE", /* name */
515 FALSE
, /* partial_inplace */
516 0xffffffff, /* src_mask */
517 0xffffffff, /* dst_mask */
518 FALSE
), /* pcrel_offset */
522 /* Map BFD reloc types to lm32 ELF reloc types. */
524 struct lm32_reloc_map
526 bfd_reloc_code_real_type bfd_reloc_val
;
527 unsigned char elf_reloc_val
;
530 static const struct lm32_reloc_map lm32_reloc_map
[] =
532 { BFD_RELOC_NONE
, R_LM32_NONE
},
533 { BFD_RELOC_8
, R_LM32_8
},
534 { BFD_RELOC_16
, R_LM32_16
},
535 { BFD_RELOC_32
, R_LM32_32
},
536 { BFD_RELOC_HI16
, R_LM32_HI16
},
537 { BFD_RELOC_LO16
, R_LM32_LO16
},
538 { BFD_RELOC_GPREL16
, R_LM32_GPREL16
},
539 { BFD_RELOC_LM32_CALL
, R_LM32_CALL
},
540 { BFD_RELOC_LM32_BRANCH
, R_LM32_BRANCH
},
541 { BFD_RELOC_VTABLE_INHERIT
, R_LM32_GNU_VTINHERIT
},
542 { BFD_RELOC_VTABLE_ENTRY
, R_LM32_GNU_VTENTRY
},
543 { BFD_RELOC_LM32_16_GOT
, R_LM32_16_GOT
},
544 { BFD_RELOC_LM32_GOTOFF_HI16
, R_LM32_GOTOFF_HI16
},
545 { BFD_RELOC_LM32_GOTOFF_LO16
, R_LM32_GOTOFF_LO16
},
546 { BFD_RELOC_LM32_COPY
, R_LM32_COPY
},
547 { BFD_RELOC_LM32_GLOB_DAT
, R_LM32_GLOB_DAT
},
548 { BFD_RELOC_LM32_JMP_SLOT
, R_LM32_JMP_SLOT
},
549 { BFD_RELOC_LM32_RELATIVE
, R_LM32_RELATIVE
},
552 static reloc_howto_type
*
553 lm32_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
554 bfd_reloc_code_real_type code
)
558 for (i
= 0; i
< sizeof (lm32_reloc_map
) / sizeof (lm32_reloc_map
[0]); i
++)
559 if (lm32_reloc_map
[i
].bfd_reloc_val
== code
)
560 return &lm32_elf_howto_table
[lm32_reloc_map
[i
].elf_reloc_val
];
564 static reloc_howto_type
*
565 lm32_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
571 i
< sizeof (lm32_elf_howto_table
) / sizeof (lm32_elf_howto_table
[0]);
573 if (lm32_elf_howto_table
[i
].name
!= NULL
574 && strcasecmp (lm32_elf_howto_table
[i
].name
, r_name
) == 0)
575 return &lm32_elf_howto_table
[i
];
581 /* Set the howto pointer for an Lattice Mico32 ELF reloc. */
584 lm32_info_to_howto_rela (bfd
*abfd ATTRIBUTE_UNUSED
,
586 Elf_Internal_Rela
*dst
)
590 r_type
= ELF32_R_TYPE (dst
->r_info
);
591 BFD_ASSERT (r_type
< (unsigned int) R_LM32_max
);
592 cache_ptr
->howto
= &lm32_elf_howto_table
[r_type
];
595 /* Set the right machine number for an Lattice Mico32 ELF file. */
598 lm32_elf_object_p (bfd
*abfd
)
600 return bfd_default_set_arch_mach (abfd
, bfd_arch_lm32
, bfd_mach_lm32
);
603 /* Set machine type flags just before file is written out. */
606 lm32_elf_final_write_processing (bfd
*abfd
, bfd_boolean linker ATTRIBUTE_UNUSED
)
608 elf_elfheader (abfd
)->e_machine
= EM_LATTICEMICO32
;
609 elf_elfheader (abfd
)->e_flags
&=~ EF_LM32_MACH
;
610 switch (bfd_get_mach (abfd
))
613 elf_elfheader (abfd
)->e_flags
|= E_LM32_MACH
;
620 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
621 dangerous relocation. */
624 lm32_elf_assign_gp (bfd
*output_bfd
, bfd_vma
*pgp
)
630 /* If we've already figured out what GP will be, just return it. */
631 *pgp
= _bfd_get_gp_value (output_bfd
);
635 count
= bfd_get_symcount (output_bfd
);
636 sym
= bfd_get_outsymbols (output_bfd
);
638 /* The linker script will have created a symbol named `_gp' with the
639 appropriate value. */
644 for (i
= 0; i
< count
; i
++, sym
++)
648 name
= bfd_asymbol_name (*sym
);
649 if (*name
== '_' && strcmp (name
, "_gp") == 0)
651 *pgp
= bfd_asymbol_value (*sym
);
652 _bfd_set_gp_value (output_bfd
, *pgp
);
660 /* Only get the error once. */
662 _bfd_set_gp_value (output_bfd
, *pgp
);
669 /* We have to figure out the gp value, so that we can adjust the
670 symbol value correctly. We look up the symbol _gp in the output
671 BFD. If we can't find it, we're stuck. We cache it in the ELF
672 target data. We don't need to adjust the symbol value for an
673 external symbol if we are producing relocatable output. */
675 static bfd_reloc_status_type
676 lm32_elf_final_gp (bfd
*output_bfd
, asymbol
*symbol
, bfd_boolean relocatable
,
677 char **error_message
, bfd_vma
*pgp
)
679 if (bfd_is_und_section (symbol
->section
) && !relocatable
)
682 return bfd_reloc_undefined
;
685 *pgp
= _bfd_get_gp_value (output_bfd
);
686 if (*pgp
== 0 && (!relocatable
|| (symbol
->flags
& BSF_SECTION_SYM
) != 0))
690 /* Make up a value. */
691 *pgp
= symbol
->section
->output_section
->vma
+ 0x4000;
692 _bfd_set_gp_value (output_bfd
, *pgp
);
694 else if (!lm32_elf_assign_gp (output_bfd
, pgp
))
698 _("global pointer relative relocation when _gp not defined");
699 return bfd_reloc_dangerous
;
706 static bfd_reloc_status_type
707 lm32_elf_do_gprel_relocate (bfd
*abfd
,
708 reloc_howto_type
*howto
,
709 asection
*input_section ATTRIBUTE_UNUSED
,
712 bfd_vma symbol_value
,
715 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
716 data
, offset
, symbol_value
, addend
);
719 static bfd_reloc_status_type
720 lm32_elf_gprel_reloc (bfd
*abfd
,
721 arelent
*reloc_entry
,
724 asection
*input_section
,
730 bfd_reloc_status_type r
;
732 if (output_bfd
!= (bfd
*) NULL
733 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
734 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
736 reloc_entry
->address
+= input_section
->output_offset
;
740 if (output_bfd
!= NULL
)
743 relocation
= symbol
->value
744 + symbol
->section
->output_section
->vma
+ symbol
->section
->output_offset
;
747 lm32_elf_final_gp (abfd
, symbol
, FALSE
, msg
, &gp
)) == bfd_reloc_ok
)
749 relocation
= relocation
+ reloc_entry
->addend
- gp
;
750 reloc_entry
->addend
= 0;
751 if ((signed) relocation
< -32768 || (signed) relocation
> 32767)
753 *msg
= _("global pointer relative address out of range");
754 r
= bfd_reloc_outofrange
;
758 r
= lm32_elf_do_gprel_relocate (abfd
, reloc_entry
->howto
,
760 data
, reloc_entry
->address
,
761 relocation
, reloc_entry
->addend
);
768 /* Find the segment number in which OSEC, and output section, is
772 _lm32fdpic_osec_to_segment (bfd
*output_bfd
, asection
*osec
)
774 struct elf_segment_map
*m
;
775 Elf_Internal_Phdr
*p
;
777 /* Find the segment that contains the output_section. */
778 for (m
= elf_seg_map (output_bfd
), p
= elf_tdata (output_bfd
)->phdr
;
784 for (i
= m
->count
- 1; i
>= 0; i
--)
785 if (m
->sections
[i
] == osec
)
792 return p
- elf_tdata (output_bfd
)->phdr
;
795 /* Determine if an output section is read-only. */
797 inline static bfd_boolean
798 _lm32fdpic_osec_readonly_p (bfd
*output_bfd
, asection
*osec
)
800 unsigned seg
= _lm32fdpic_osec_to_segment (output_bfd
, osec
);
802 return ! (elf_tdata (output_bfd
)->phdr
[seg
].p_flags
& PF_W
);
805 /* Relocate a section */
808 lm32_elf_relocate_section (bfd
*output_bfd
,
809 struct bfd_link_info
*info
,
811 asection
*input_section
,
813 Elf_Internal_Rela
*relocs
,
814 Elf_Internal_Sym
*local_syms
,
815 asection
**local_sections
)
817 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
818 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
819 Elf_Internal_Rela
*rel
, *relend
;
820 struct elf_lm32_link_hash_table
*htab
= lm32_elf_hash_table (info
);
822 bfd_vma
*local_got_offsets
;
828 dynobj
= htab
->root
.dynobj
;
829 local_got_offsets
= elf_local_got_offsets (input_bfd
);
833 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
834 sym_hashes
= elf_sym_hashes (input_bfd
);
837 relend
= relocs
+ input_section
->reloc_count
;
838 for (; rel
< relend
; rel
++)
840 reloc_howto_type
*howto
;
842 unsigned long r_symndx
;
843 Elf_Internal_Sym
*sym
;
845 struct elf_link_hash_entry
*h
;
848 bfd_reloc_status_type r
;
849 const char *name
= NULL
;
851 r_symndx
= ELF32_R_SYM (rel
->r_info
);
852 r_type
= ELF32_R_TYPE (rel
->r_info
);
854 if (r_type
== R_LM32_GNU_VTENTRY
855 || r_type
== R_LM32_GNU_VTINHERIT
)
862 howto
= lm32_elf_howto_table
+ r_type
;
864 if (r_symndx
< symtab_hdr
->sh_info
)
866 /* It's a local symbol. */
867 sym
= local_syms
+ r_symndx
;
868 sec
= local_sections
[r_symndx
];
869 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
870 name
= bfd_elf_string_from_elf_section
871 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
872 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
876 /* It's a global symbol. */
877 bfd_boolean unresolved_reloc
;
880 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
881 r_symndx
, symtab_hdr
, sym_hashes
,
883 unresolved_reloc
, warned
);
884 name
= h
->root
.root
.string
;
887 if (sec
!= NULL
&& discarded_section (sec
))
888 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
889 rel
, 1, relend
, howto
, 0, contents
);
891 if (info
->relocatable
)
893 /* This is a relocatable link. We don't have to change
894 anything, unless the reloc is against a section symbol,
895 in which case we have to adjust according to where the
896 section symbol winds up in the output section. */
897 if (sym
== NULL
|| ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
900 /* If partial_inplace, we need to store any additional addend
901 back in the section. */
902 if (! howto
->partial_inplace
)
905 /* Shouldn't reach here. */
914 if (!lm32_elf_assign_gp (output_bfd
, &gp
))
915 r
= bfd_reloc_dangerous
;
918 relocation
= relocation
+ rel
->r_addend
- gp
;
920 if ((signed)relocation
< -32768 || (signed)relocation
> 32767)
921 r
= bfd_reloc_outofrange
;
924 r
= _bfd_final_link_relocate (howto
, input_bfd
,
925 input_section
, contents
,
926 rel
->r_offset
, relocation
,
932 /* Relocation is to the entry for this symbol in the global
934 BFD_ASSERT (sgot
!= NULL
);
941 BFD_ASSERT (off
!= (bfd_vma
) -1);
943 dyn
= htab
->root
.dynamic_sections_created
;
944 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
951 /* This is actually a static link, or it is a
952 -Bsymbolic link and the symbol is defined
953 locally, or the symbol was forced to be local
954 because of a version file. We must initialize
955 this entry in the global offset table. Since the
956 offset must always be a multiple of 4, we use the
957 least significant bit to record whether we have
958 initialized it already.
960 When doing a dynamic link, we create a .rela.got
961 relocation entry to initialize the value. This
962 is done in the finish_dynamic_symbol routine. */
967 /* Write entry in GOT */
968 bfd_put_32 (output_bfd
, relocation
,
969 sgot
->contents
+ off
);
970 /* Create entry in .rofixup pointing to GOT entry. */
971 if (IS_FDPIC (output_bfd
) && h
->root
.type
!= bfd_link_hash_undefweak
)
973 _lm32fdpic_add_rofixup (output_bfd
,
974 lm32fdpic_fixup32_section
976 sgot
->output_section
->vma
977 + sgot
->output_offset
980 /* Mark GOT entry as having been written. */
985 relocation
= sgot
->output_offset
+ off
;
992 BFD_ASSERT (local_got_offsets
!= NULL
993 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
995 /* Get offset into GOT table. */
996 off
= local_got_offsets
[r_symndx
];
998 /* The offset must always be a multiple of 4. We use
999 the least significant bit to record whether we have
1000 already processed this entry. */
1005 /* Write entry in GOT. */
1006 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1007 /* Create entry in .rofixup pointing to GOT entry. */
1008 if (IS_FDPIC (output_bfd
))
1010 _lm32fdpic_add_rofixup (output_bfd
,
1011 lm32fdpic_fixup32_section
1013 sgot
->output_section
->vma
1014 + sgot
->output_offset
1021 Elf_Internal_Rela outrel
;
1023 /* We need to generate a R_LM32_RELATIVE reloc
1024 for the dynamic linker. */
1025 srelgot
= bfd_get_linker_section (dynobj
,
1027 BFD_ASSERT (srelgot
!= NULL
);
1029 outrel
.r_offset
= (sgot
->output_section
->vma
1030 + sgot
->output_offset
1032 outrel
.r_info
= ELF32_R_INFO (0, R_LM32_RELATIVE
);
1033 outrel
.r_addend
= relocation
;
1034 loc
= srelgot
->contents
;
1035 loc
+= srelgot
->reloc_count
* sizeof (Elf32_External_Rela
);
1036 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,loc
);
1037 ++srelgot
->reloc_count
;
1040 local_got_offsets
[r_symndx
] |= 1;
1044 relocation
= sgot
->output_offset
+ off
;
1047 /* Addend should be zero. */
1048 if (rel
->r_addend
!= 0)
1049 (*_bfd_error_handler
) (_("internal error: addend should be zero for R_LM32_16_GOT"));
1051 r
= _bfd_final_link_relocate (howto
,
1060 case R_LM32_GOTOFF_LO16
:
1061 case R_LM32_GOTOFF_HI16
:
1062 /* Relocation is offset from GOT. */
1063 BFD_ASSERT (sgot
!= NULL
);
1064 relocation
-= sgot
->output_section
->vma
;
1065 /* Account for sign-extension. */
1066 if ((r_type
== R_LM32_GOTOFF_HI16
)
1067 && ((relocation
+ rel
->r_addend
) & 0x8000))
1068 rel
->r_addend
+= 0x10000;
1069 r
= _bfd_final_link_relocate (howto
,
1079 if (IS_FDPIC (output_bfd
))
1081 if ((!h
) || (h
&& h
->root
.type
!= bfd_link_hash_undefweak
))
1083 /* Only create .rofixup entries for relocs in loadable sections. */
1084 if ((bfd_get_section_flags (output_bfd
, input_section
->output_section
)
1085 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
1088 /* Check address to be modified is writable. */
1089 if (_lm32fdpic_osec_readonly_p (output_bfd
,
1093 info
->callbacks
->warning
1095 _("cannot emit dynamic relocations in read-only section"),
1096 name
, input_bfd
, input_section
, rel
->r_offset
);
1099 /* Create entry in .rofixup section. */
1100 _lm32fdpic_add_rofixup (output_bfd
,
1101 lm32fdpic_fixup32_section (info
),
1102 input_section
->output_section
->vma
1103 + input_section
->output_offset
1111 r
= _bfd_final_link_relocate (howto
,
1122 if (r
!= bfd_reloc_ok
)
1124 const char *msg
= NULL
;
1127 lm32_info_to_howto_rela (input_bfd
, &bfd_reloc
, rel
);
1128 howto
= bfd_reloc
.howto
;
1131 name
= h
->root
.root
.string
;
1134 name
= (bfd_elf_string_from_elf_section
1135 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
1136 if (name
== NULL
|| *name
== '\0')
1137 name
= bfd_section_name (input_bfd
, sec
);
1142 case bfd_reloc_overflow
:
1144 && (h
->root
.type
== bfd_link_hash_undefweak
))
1146 if (! ((*info
->callbacks
->reloc_overflow
)
1147 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1148 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
)))
1152 case bfd_reloc_undefined
:
1153 if (! ((*info
->callbacks
->undefined_symbol
)
1154 (info
, name
, input_bfd
, input_section
,
1155 rel
->r_offset
, TRUE
)))
1159 case bfd_reloc_outofrange
:
1160 msg
= _("internal error: out of range error");
1163 case bfd_reloc_notsupported
:
1164 msg
= _("internal error: unsupported relocation error");
1167 case bfd_reloc_dangerous
:
1168 msg
= _("internal error: dangerous error");
1172 msg
= _("internal error: unknown error");
1176 if (!((*info
->callbacks
->warning
)
1177 (info
, msg
, name
, input_bfd
, input_section
,
1189 lm32_elf_gc_mark_hook (asection
*sec
,
1190 struct bfd_link_info
*info
,
1191 Elf_Internal_Rela
*rel
,
1192 struct elf_link_hash_entry
*h
,
1193 Elf_Internal_Sym
*sym
)
1196 switch (ELF32_R_TYPE (rel
->r_info
))
1198 case R_LM32_GNU_VTINHERIT
:
1199 case R_LM32_GNU_VTENTRY
:
1203 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1207 lm32_elf_gc_sweep_hook (bfd
*abfd
,
1208 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1210 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
)
1212 /* Update the got entry reference counts for the section being removed. */
1213 Elf_Internal_Shdr
*symtab_hdr
;
1214 struct elf_link_hash_entry
**sym_hashes
;
1215 bfd_signed_vma
*local_got_refcounts
;
1216 const Elf_Internal_Rela
*rel
, *relend
;
1218 elf_section_data (sec
)->local_dynrel
= NULL
;
1220 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1221 sym_hashes
= elf_sym_hashes (abfd
);
1222 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1224 relend
= relocs
+ sec
->reloc_count
;
1225 for (rel
= relocs
; rel
< relend
; rel
++)
1227 unsigned long r_symndx
;
1228 struct elf_link_hash_entry
*h
= NULL
;
1230 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1231 if (r_symndx
>= symtab_hdr
->sh_info
)
1233 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1234 while (h
->root
.type
== bfd_link_hash_indirect
1235 || h
->root
.type
== bfd_link_hash_warning
)
1236 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1239 switch (ELF32_R_TYPE (rel
->r_info
))
1244 if (h
->got
.refcount
> 0)
1249 if (local_got_refcounts
&& local_got_refcounts
[r_symndx
] > 0)
1250 local_got_refcounts
[r_symndx
]--;
1261 /* Look through the relocs for a section during the first phase. */
1264 lm32_elf_check_relocs (bfd
*abfd
,
1265 struct bfd_link_info
*info
,
1267 const Elf_Internal_Rela
*relocs
)
1269 Elf_Internal_Shdr
*symtab_hdr
;
1270 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
1271 const Elf_Internal_Rela
*rel
;
1272 const Elf_Internal_Rela
*rel_end
;
1273 struct elf_lm32_link_hash_table
*htab
;
1276 if (info
->relocatable
)
1279 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1280 sym_hashes
= elf_sym_hashes (abfd
);
1281 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof (Elf32_External_Sym
);
1282 if (!elf_bad_symtab (abfd
))
1283 sym_hashes_end
-= symtab_hdr
->sh_info
;
1285 htab
= lm32_elf_hash_table (info
);
1289 dynobj
= htab
->root
.dynobj
;
1291 rel_end
= relocs
+ sec
->reloc_count
;
1292 for (rel
= relocs
; rel
< rel_end
; rel
++)
1295 struct elf_link_hash_entry
*h
;
1296 unsigned long r_symndx
;
1298 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1299 r_type
= ELF32_R_TYPE (rel
->r_info
);
1300 if (r_symndx
< symtab_hdr
->sh_info
)
1304 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1305 while (h
->root
.type
== bfd_link_hash_indirect
1306 || h
->root
.type
== bfd_link_hash_warning
)
1307 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1310 /* Some relocs require a global offset table. */
1311 if (htab
->sgot
== NULL
)
1316 case R_LM32_GOTOFF_HI16
:
1317 case R_LM32_GOTOFF_LO16
:
1319 htab
->root
.dynobj
= dynobj
= abfd
;
1320 if (! create_got_section (dynobj
, info
))
1326 /* Some relocs require a rofixup table. */
1327 if (IS_FDPIC (abfd
))
1332 /* FDPIC requires a GOT if there is a .rofixup section
1333 (Normal ELF doesn't). */
1335 htab
->root
.dynobj
= dynobj
= abfd
;
1336 if (! create_got_section (dynobj
, info
))
1338 /* Create .rofixup section */
1339 if (htab
->sfixup32
== NULL
)
1341 if (! create_rofixup_section (dynobj
, info
))
1346 case R_LM32_GOTOFF_HI16
:
1347 case R_LM32_GOTOFF_LO16
:
1348 /* Create .rofixup section. */
1349 if (htab
->sfixup32
== NULL
)
1352 htab
->root
.dynobj
= dynobj
= abfd
;
1353 if (! create_rofixup_section (dynobj
, info
))
1364 h
->got
.refcount
+= 1;
1367 bfd_signed_vma
*local_got_refcounts
;
1369 /* This is a global offset table entry for a local symbol. */
1370 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1371 if (local_got_refcounts
== NULL
)
1375 size
= symtab_hdr
->sh_info
;
1376 size
*= sizeof (bfd_signed_vma
);
1377 local_got_refcounts
= bfd_zalloc (abfd
, size
);
1378 if (local_got_refcounts
== NULL
)
1380 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1382 local_got_refcounts
[r_symndx
] += 1;
1386 /* This relocation describes the C++ object vtable hierarchy.
1387 Reconstruct it for later use during GC. */
1388 case R_LM32_GNU_VTINHERIT
:
1389 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1393 /* This relocation describes which C++ vtable entries are actually
1394 used. Record for later use during GC. */
1395 case R_LM32_GNU_VTENTRY
:
1396 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1406 /* Finish up the dynamic sections. */
1409 lm32_elf_finish_dynamic_sections (bfd
*output_bfd
,
1410 struct bfd_link_info
*info
)
1412 struct elf_lm32_link_hash_table
*htab
;
1417 htab
= lm32_elf_hash_table (info
);
1421 dynobj
= htab
->root
.dynobj
;
1423 sgot
= htab
->sgotplt
;
1424 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
1426 if (htab
->root
.dynamic_sections_created
)
1429 Elf32_External_Dyn
*dyncon
, *dynconend
;
1431 BFD_ASSERT (sgot
!= NULL
&& sdyn
!= NULL
);
1433 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
1434 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
1436 for (; dyncon
< dynconend
; dyncon
++)
1438 Elf_Internal_Dyn dyn
;
1441 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
1449 s
= htab
->sgot
->output_section
;
1452 s
= htab
->srelplt
->output_section
;
1454 BFD_ASSERT (s
!= NULL
);
1455 dyn
.d_un
.d_ptr
= s
->vma
;
1456 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1460 s
= htab
->srelplt
->output_section
;
1461 BFD_ASSERT (s
!= NULL
);
1462 dyn
.d_un
.d_val
= s
->size
;
1463 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1467 /* My reading of the SVR4 ABI indicates that the
1468 procedure linkage table relocs (DT_JMPREL) should be
1469 included in the overall relocs (DT_RELA). This is
1470 what Solaris does. However, UnixWare can not handle
1471 that case. Therefore, we override the DT_RELASZ entry
1472 here to make it not include the JMPREL relocs. Since
1473 the linker script arranges for .rela.plt to follow all
1474 other relocation sections, we don't have to worry
1475 about changing the DT_RELA entry. */
1476 if (htab
->srelplt
!= NULL
)
1478 s
= htab
->srelplt
->output_section
;
1479 dyn
.d_un
.d_val
-= s
->size
;
1481 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
1486 /* Fill in the first entry in the procedure linkage table. */
1488 if (splt
&& splt
->size
> 0)
1492 bfd_put_32 (output_bfd
, PLT0_PIC_ENTRY_WORD0
, splt
->contents
);
1493 bfd_put_32 (output_bfd
, PLT0_PIC_ENTRY_WORD1
, splt
->contents
+ 4);
1494 bfd_put_32 (output_bfd
, PLT0_PIC_ENTRY_WORD2
, splt
->contents
+ 8);
1495 bfd_put_32 (output_bfd
, PLT0_PIC_ENTRY_WORD3
, splt
->contents
+ 12);
1496 bfd_put_32 (output_bfd
, PLT0_PIC_ENTRY_WORD4
, splt
->contents
+ 16);
1501 /* addr = .got + 4 */
1502 addr
= sgot
->output_section
->vma
+ sgot
->output_offset
+ 4;
1503 bfd_put_32 (output_bfd
,
1504 PLT0_ENTRY_WORD0
| ((addr
>> 16) & 0xffff),
1506 bfd_put_32 (output_bfd
,
1507 PLT0_ENTRY_WORD1
| (addr
& 0xffff),
1508 splt
->contents
+ 4);
1509 bfd_put_32 (output_bfd
, PLT0_ENTRY_WORD2
, splt
->contents
+ 8);
1510 bfd_put_32 (output_bfd
, PLT0_ENTRY_WORD3
, splt
->contents
+ 12);
1511 bfd_put_32 (output_bfd
, PLT0_ENTRY_WORD4
, splt
->contents
+ 16);
1514 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
=
1519 /* Fill in the first three entries in the global offset table. */
1520 if (sgot
&& sgot
->size
> 0)
1523 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
1525 bfd_put_32 (output_bfd
,
1526 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
1528 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 4);
1529 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ 8);
1531 /* FIXME: This can be null if create_dynamic_sections wasn't called. */
1532 if (elf_section_data (sgot
->output_section
) != NULL
)
1533 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
1536 if (lm32fdpic_fixup32_section (info
))
1538 struct elf_link_hash_entry
*hgot
= elf_hash_table (info
)->hgot
;
1539 bfd_vma got_value
= hgot
->root
.u
.def
.value
1540 + hgot
->root
.u
.def
.section
->output_section
->vma
1541 + hgot
->root
.u
.def
.section
->output_offset
;
1542 struct bfd_link_hash_entry
*hend
;
1544 /* Last entry is pointer to GOT. */
1545 _lm32fdpic_add_rofixup (output_bfd
, lm32fdpic_fixup32_section (info
), got_value
);
1547 /* Check we wrote enough entries. */
1548 if (lm32fdpic_fixup32_section (info
)->size
1549 != (lm32fdpic_fixup32_section (info
)->reloc_count
* 4))
1551 (*_bfd_error_handler
)
1552 ("LINKER BUG: .rofixup section size mismatch: size/4 %d != relocs %d",
1553 lm32fdpic_fixup32_section (info
)->size
/4,
1554 lm32fdpic_fixup32_section (info
)->reloc_count
);
1558 hend
= bfd_link_hash_lookup (info
->hash
, "__ROFIXUP_END__",
1559 FALSE
, FALSE
, TRUE
);
1561 && (hend
->type
== bfd_link_hash_defined
1562 || hend
->type
== bfd_link_hash_defweak
))
1565 lm32fdpic_fixup32_section (info
)->output_section
->vma
1566 + lm32fdpic_fixup32_section (info
)->output_offset
1567 + lm32fdpic_fixup32_section (info
)->size
1568 - hend
->u
.def
.section
->output_section
->vma
1569 - hend
->u
.def
.section
->output_offset
;
1570 BFD_ASSERT (hend
->u
.def
.value
== value
);
1571 if (hend
->u
.def
.value
!= value
)
1573 (*_bfd_error_handler
)
1574 ("LINKER BUG: .rofixup section hend->u.def.value != value: %ld != %ld", hend
->u
.def
.value
, value
);
1583 /* Finish up dynamic symbol handling. We set the contents of various
1584 dynamic sections here. */
1587 lm32_elf_finish_dynamic_symbol (bfd
*output_bfd
,
1588 struct bfd_link_info
*info
,
1589 struct elf_link_hash_entry
*h
,
1590 Elf_Internal_Sym
*sym
)
1592 struct elf_lm32_link_hash_table
*htab
;
1595 htab
= lm32_elf_hash_table (info
);
1599 if (h
->plt
.offset
!= (bfd_vma
) -1)
1607 Elf_Internal_Rela rela
;
1609 /* This symbol has an entry in the procedure linkage table. Set
1611 BFD_ASSERT (h
->dynindx
!= -1);
1614 sgot
= htab
->sgotplt
;
1615 srela
= htab
->srelplt
;
1616 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
1618 /* Get the index in the procedure linkage table which
1619 corresponds to this symbol. This is the index of this symbol
1620 in all the symbols for which we are making plt entries. The
1621 first entry in the procedure linkage table is reserved. */
1622 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
1624 /* Get the offset into the .got table of the entry that
1625 corresponds to this function. Each .got entry is 4 bytes.
1626 The first three are reserved. */
1627 got_offset
= (plt_index
+ 3) * 4;
1629 /* Fill in the entry in the procedure linkage table. */
1639 /* Fill in the entry in the global offset table. */
1640 bfd_put_32 (output_bfd
,
1641 (splt
->output_section
->vma
1642 + splt
->output_offset
1644 + 12), /* same offset */
1645 sgot
->contents
+ got_offset
);
1647 /* Fill in the entry in the .rela.plt section. */
1648 rela
.r_offset
= (sgot
->output_section
->vma
1649 + sgot
->output_offset
1651 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_LM32_JMP_SLOT
);
1653 loc
= srela
->contents
;
1654 loc
+= plt_index
* sizeof (Elf32_External_Rela
);
1655 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1657 if (!h
->def_regular
)
1659 /* Mark the symbol as undefined, rather than as defined in
1660 the .plt section. Leave the value alone. */
1661 sym
->st_shndx
= SHN_UNDEF
;
1666 if (h
->got
.offset
!= (bfd_vma
) -1)
1670 Elf_Internal_Rela rela
;
1672 /* This symbol has an entry in the global offset table. Set it
1675 srela
= htab
->srelgot
;
1676 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
1678 rela
.r_offset
= (sgot
->output_section
->vma
1679 + sgot
->output_offset
1680 + (h
->got
.offset
&~ 1));
1682 /* If this is a -Bsymbolic link, and the symbol is defined
1683 locally, we just want to emit a RELATIVE reloc. Likewise if
1684 the symbol was forced to be local because of a version file.
1685 The entry in the global offset table will already have been
1686 initialized in the relocate_section function. */
1693 rela
.r_info
= ELF32_R_INFO (0, R_LM32_RELATIVE
);
1694 rela
.r_addend
= (h
->root
.u
.def
.value
1695 + h
->root
.u
.def
.section
->output_section
->vma
1696 + h
->root
.u
.def
.section
->output_offset
);
1700 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
1701 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ h
->got
.offset
);
1702 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_LM32_GLOB_DAT
);
1706 loc
= srela
->contents
;
1707 loc
+= srela
->reloc_count
* sizeof (Elf32_External_Rela
);
1708 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1709 ++srela
->reloc_count
;
1715 Elf_Internal_Rela rela
;
1717 /* This symbols needs a copy reloc. Set it up. */
1718 BFD_ASSERT (h
->dynindx
!= -1
1719 && (h
->root
.type
== bfd_link_hash_defined
1720 || h
->root
.type
== bfd_link_hash_defweak
));
1722 s
= bfd_get_linker_section (htab
->root
.dynobj
, ".rela.bss");
1723 BFD_ASSERT (s
!= NULL
);
1725 rela
.r_offset
= (h
->root
.u
.def
.value
1726 + h
->root
.u
.def
.section
->output_section
->vma
1727 + h
->root
.u
.def
.section
->output_offset
);
1728 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_LM32_COPY
);
1731 loc
+= s
->reloc_count
* sizeof (Elf32_External_Rela
);
1732 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
1736 /* Mark some specially defined symbols as absolute. */
1737 if (h
== htab
->root
.hdynamic
|| h
== htab
->root
.hgot
)
1738 sym
->st_shndx
= SHN_ABS
;
1743 static enum elf_reloc_type_class
1744 lm32_elf_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1745 const asection
*rel_sec ATTRIBUTE_UNUSED
,
1746 const Elf_Internal_Rela
*rela
)
1748 switch ((int) ELF32_R_TYPE (rela
->r_info
))
1750 case R_LM32_RELATIVE
: return reloc_class_relative
;
1751 case R_LM32_JMP_SLOT
: return reloc_class_plt
;
1752 case R_LM32_COPY
: return reloc_class_copy
;
1753 default: return reloc_class_normal
;
1757 /* Adjust a symbol defined by a dynamic object and referenced by a
1758 regular object. The current definition is in some section of the
1759 dynamic object, but we're not including those sections. We have to
1760 change the definition to something the rest of the link can
1764 lm32_elf_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1765 struct elf_link_hash_entry
*h
)
1767 struct elf_lm32_link_hash_table
*htab
;
1768 struct elf_lm32_link_hash_entry
*eh
;
1769 struct elf_lm32_dyn_relocs
*p
;
1773 dynobj
= elf_hash_table (info
)->dynobj
;
1775 /* Make sure we know what is going on here. */
1776 BFD_ASSERT (dynobj
!= NULL
1778 || h
->u
.weakdef
!= NULL
1781 && !h
->def_regular
)));
1783 /* If this is a function, put it in the procedure linkage table. We
1784 will fill in the contents of the procedure linkage table later,
1785 when we know the address of the .got section. */
1786 if (h
->type
== STT_FUNC
1792 && h
->root
.type
!= bfd_link_hash_undefweak
1793 && h
->root
.type
!= bfd_link_hash_undefined
)
1795 /* This case can occur if we saw a PLT reloc in an input
1796 file, but the symbol was never referred to by a dynamic
1797 object. In such a case, we don't actually need to build
1798 a procedure linkage table, and we can just do a PCREL
1800 h
->plt
.offset
= (bfd_vma
) -1;
1807 h
->plt
.offset
= (bfd_vma
) -1;
1809 /* If this is a weak symbol, and there is a real definition, the
1810 processor independent code will have arranged for us to see the
1811 real definition first, and we can just use the same value. */
1812 if (h
->u
.weakdef
!= NULL
)
1814 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1815 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1816 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1817 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1821 /* This is a reference to a symbol defined by a dynamic object which
1822 is not a function. */
1824 /* If we are creating a shared library, we must presume that the
1825 only references to the symbol are via the global offset table.
1826 For such cases we need not do anything here; the relocations will
1827 be handled correctly by relocate_section. */
1831 /* If there are no references to this symbol that do not use the
1832 GOT, we don't need to generate a copy reloc. */
1833 if (!h
->non_got_ref
)
1836 /* If -z nocopyreloc was given, we won't generate them either. */
1837 if (info
->nocopyreloc
)
1843 eh
= (struct elf_lm32_link_hash_entry
*) h
;
1844 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1846 s
= p
->sec
->output_section
;
1847 if (s
!= NULL
&& (s
->flags
& (SEC_READONLY
| SEC_HAS_CONTENTS
)) != 0)
1851 /* If we didn't find any dynamic relocs in sections which needs the
1852 copy reloc, then we'll be keeping the dynamic relocs and avoiding
1860 /* We must allocate the symbol in our .dynbss section, which will
1861 become part of the .bss section of the executable. There will be
1862 an entry for this symbol in the .dynsym section. The dynamic
1863 object will contain position independent code, so all references
1864 from the dynamic object to this symbol will go through the global
1865 offset table. The dynamic linker will use the .dynsym entry to
1866 determine the address it must put in the global offset table, so
1867 both the dynamic object and the regular object will refer to the
1868 same memory location for the variable. */
1870 htab
= lm32_elf_hash_table (info
);
1875 BFD_ASSERT (s
!= NULL
);
1877 /* We must generate a R_LM32_COPY reloc to tell the dynamic linker
1878 to copy the initial value out of the dynamic object and into the
1879 runtime process image. We need to remember the offset into the
1880 .rela.bss section we are going to use. */
1881 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
1885 srel
= htab
->srelbss
;
1886 BFD_ASSERT (srel
!= NULL
);
1887 srel
->size
+= sizeof (Elf32_External_Rela
);
1891 return _bfd_elf_adjust_dynamic_copy (h
, s
);
1894 /* Allocate space in .plt, .got and associated reloc sections for
1898 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
1900 struct bfd_link_info
*info
;
1901 struct elf_lm32_link_hash_table
*htab
;
1902 struct elf_lm32_link_hash_entry
*eh
;
1903 struct elf_lm32_dyn_relocs
*p
;
1905 if (h
->root
.type
== bfd_link_hash_indirect
)
1908 info
= (struct bfd_link_info
*) inf
;
1909 htab
= lm32_elf_hash_table (info
);
1913 eh
= (struct elf_lm32_link_hash_entry
*) h
;
1915 if (htab
->root
.dynamic_sections_created
1916 && h
->plt
.refcount
> 0)
1918 /* Make sure this symbol is output as a dynamic symbol.
1919 Undefined weak syms won't yet be marked as dynamic. */
1920 if (h
->dynindx
== -1
1921 && !h
->forced_local
)
1923 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1927 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info
->shared
, h
))
1929 asection
*s
= htab
->splt
;
1931 /* If this is the first .plt entry, make room for the special
1934 s
->size
+= PLT_ENTRY_SIZE
;
1936 h
->plt
.offset
= s
->size
;
1938 /* If this symbol is not defined in a regular file, and we are
1939 not generating a shared library, then set the symbol to this
1940 location in the .plt. This is required to make function
1941 pointers compare as equal between the normal executable and
1942 the shared library. */
1946 h
->root
.u
.def
.section
= s
;
1947 h
->root
.u
.def
.value
= h
->plt
.offset
;
1950 /* Make room for this entry. */
1951 s
->size
+= PLT_ENTRY_SIZE
;
1953 /* We also need to make an entry in the .got.plt section, which
1954 will be placed in the .got section by the linker script. */
1955 htab
->sgotplt
->size
+= 4;
1957 /* We also need to make an entry in the .rel.plt section. */
1958 htab
->srelplt
->size
+= sizeof (Elf32_External_Rela
);
1962 h
->plt
.offset
= (bfd_vma
) -1;
1968 h
->plt
.offset
= (bfd_vma
) -1;
1972 if (h
->got
.refcount
> 0)
1977 /* Make sure this symbol is output as a dynamic symbol.
1978 Undefined weak syms won't yet be marked as dynamic. */
1979 if (h
->dynindx
== -1
1980 && !h
->forced_local
)
1982 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1988 h
->got
.offset
= s
->size
;
1990 dyn
= htab
->root
.dynamic_sections_created
;
1991 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
))
1992 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
1995 h
->got
.offset
= (bfd_vma
) -1;
1997 if (eh
->dyn_relocs
== NULL
)
2000 /* In the shared -Bsymbolic case, discard space allocated for
2001 dynamic pc-relative relocs against symbols which turn out to be
2002 defined in regular objects. For the normal shared case, discard
2003 space for pc-relative relocs that have become local due to symbol
2004 visibility changes. */
2012 struct elf_lm32_dyn_relocs
**pp
;
2014 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
;)
2016 p
->count
-= p
->pc_count
;
2025 /* Also discard relocs on undefined weak syms with non-default
2027 if (eh
->dyn_relocs
!= NULL
2028 && h
->root
.type
== bfd_link_hash_undefweak
)
2030 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2031 eh
->dyn_relocs
= NULL
;
2033 /* Make sure undefined weak symbols are output as a dynamic
2035 else if (h
->dynindx
== -1
2036 && !h
->forced_local
)
2038 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2045 /* For the non-shared case, discard space for relocs against
2046 symbols which turn out to need copy relocs or are not
2052 || (htab
->root
.dynamic_sections_created
2053 && (h
->root
.type
== bfd_link_hash_undefweak
2054 || h
->root
.type
== bfd_link_hash_undefined
))))
2056 /* Make sure this symbol is output as a dynamic symbol.
2057 Undefined weak syms won't yet be marked as dynamic. */
2058 if (h
->dynindx
== -1
2059 && !h
->forced_local
)
2061 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2065 /* If that succeeded, we know we'll be keeping all the
2067 if (h
->dynindx
!= -1)
2071 eh
->dyn_relocs
= NULL
;
2076 /* Finally, allocate space. */
2077 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2079 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
2080 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2086 /* Find any dynamic relocs that apply to read-only sections. */
2089 readonly_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2091 struct elf_lm32_link_hash_entry
*eh
;
2092 struct elf_lm32_dyn_relocs
*p
;
2094 eh
= (struct elf_lm32_link_hash_entry
*) h
;
2095 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2097 asection
*s
= p
->sec
->output_section
;
2099 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2101 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2103 info
->flags
|= DF_TEXTREL
;
2105 /* Not an error, just cut short the traversal. */
2112 /* Set the sizes of the dynamic sections. */
2115 lm32_elf_size_dynamic_sections (bfd
*output_bfd
,
2116 struct bfd_link_info
*info
)
2118 struct elf_lm32_link_hash_table
*htab
;
2124 htab
= lm32_elf_hash_table (info
);
2128 dynobj
= htab
->root
.dynobj
;
2129 BFD_ASSERT (dynobj
!= NULL
);
2131 if (htab
->root
.dynamic_sections_created
)
2133 /* Set the contents of the .interp section to the interpreter. */
2134 if (info
->executable
)
2136 s
= bfd_get_linker_section (dynobj
, ".interp");
2137 BFD_ASSERT (s
!= NULL
);
2138 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2139 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2143 /* Set up .got offsets for local syms, and space for local dynamic
2145 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2147 bfd_signed_vma
*local_got
;
2148 bfd_signed_vma
*end_local_got
;
2149 bfd_size_type locsymcount
;
2150 Elf_Internal_Shdr
*symtab_hdr
;
2153 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2156 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2158 struct elf_lm32_dyn_relocs
*p
;
2160 for (p
= ((struct elf_lm32_dyn_relocs
*)
2161 elf_section_data (s
)->local_dynrel
);
2165 if (! bfd_is_abs_section (p
->sec
)
2166 && bfd_is_abs_section (p
->sec
->output_section
))
2168 /* Input section has been discarded, either because
2169 it is a copy of a linkonce section or due to
2170 linker script /DISCARD/, so we'll be discarding
2173 else if (p
->count
!= 0)
2175 srel
= elf_section_data (p
->sec
)->sreloc
;
2176 srel
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2177 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2178 info
->flags
|= DF_TEXTREL
;
2183 local_got
= elf_local_got_refcounts (ibfd
);
2187 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2188 locsymcount
= symtab_hdr
->sh_info
;
2189 end_local_got
= local_got
+ locsymcount
;
2191 srel
= htab
->srelgot
;
2192 for (; local_got
< end_local_got
; ++local_got
)
2196 *local_got
= s
->size
;
2199 srel
->size
+= sizeof (Elf32_External_Rela
);
2202 *local_got
= (bfd_vma
) -1;
2206 /* Allocate global sym .plt and .got entries, and space for global
2207 sym dynamic relocs. */
2208 elf_link_hash_traverse (&htab
->root
, allocate_dynrelocs
, info
);
2210 /* We now have determined the sizes of the various dynamic sections.
2211 Allocate memory for them. */
2213 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2215 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2220 || s
== htab
->sgotplt
2221 || s
== htab
->sdynbss
)
2223 /* Strip this section if we don't need it; see the
2226 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2228 if (s
->size
!= 0 && s
!= htab
->srelplt
)
2231 /* We use the reloc_count field as a counter if we need
2232 to copy relocs into the output file. */
2236 /* It's not one of our sections, so don't allocate space. */
2241 /* If we don't need this section, strip it from the
2242 output file. This is mostly to handle .rela.bss and
2243 .rela.plt. We must create both sections in
2244 create_dynamic_sections, because they must be created
2245 before the linker maps input sections to output
2246 sections. The linker does that before
2247 adjust_dynamic_symbol is called, and it is that
2248 function which decides whether anything needs to go
2249 into these sections. */
2250 s
->flags
|= SEC_EXCLUDE
;
2254 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2257 /* Allocate memory for the section contents. We use bfd_zalloc
2258 here in case unused entries are not reclaimed before the
2259 section's contents are written out. This should not happen,
2260 but this way if it does, we get a R_LM32_NONE reloc instead
2262 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2263 if (s
->contents
== NULL
)
2267 if (htab
->root
.dynamic_sections_created
)
2269 /* Add some entries to the .dynamic section. We fill in the
2270 values later, in lm32_elf_finish_dynamic_sections, but we
2271 must add the entries now so that we get the correct size for
2272 the .dynamic section. The DT_DEBUG entry is filled in by the
2273 dynamic linker and used by the debugger. */
2274 #define add_dynamic_entry(TAG, VAL) \
2275 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2277 if (info
->executable
)
2279 if (! add_dynamic_entry (DT_DEBUG
, 0))
2283 if (htab
->splt
->size
!= 0)
2285 if (! add_dynamic_entry (DT_PLTGOT
, 0)
2286 || ! add_dynamic_entry (DT_PLTRELSZ
, 0)
2287 || ! add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2288 || ! add_dynamic_entry (DT_JMPREL
, 0))
2294 if (! add_dynamic_entry (DT_RELA
, 0)
2295 || ! add_dynamic_entry (DT_RELASZ
, 0)
2296 || ! add_dynamic_entry (DT_RELAENT
,
2297 sizeof (Elf32_External_Rela
)))
2300 /* If any dynamic relocs apply to a read-only section,
2301 then we need a DT_TEXTREL entry. */
2302 if ((info
->flags
& DF_TEXTREL
) == 0)
2303 elf_link_hash_traverse (&htab
->root
, readonly_dynrelocs
,
2306 if ((info
->flags
& DF_TEXTREL
) != 0)
2308 if (! add_dynamic_entry (DT_TEXTREL
, 0))
2313 #undef add_dynamic_entry
2315 /* Allocate .rofixup section. */
2316 if (IS_FDPIC (output_bfd
))
2318 struct weak_symbol_list
*list_start
= NULL
, *list_end
= NULL
;
2319 int rgot_weak_count
= 0;
2322 /* Look for deleted sections. */
2323 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2325 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2329 /* Count relocs that need .rofixup entires. */
2330 Elf_Internal_Rela
*internal_relocs
, *end
;
2331 internal_relocs
= elf_section_data (s
)->relocs
;
2332 if (internal_relocs
== NULL
)
2333 internal_relocs
= (_bfd_elf_link_read_relocs (ibfd
, s
, NULL
, NULL
, FALSE
));
2334 if (internal_relocs
!= NULL
)
2336 end
= internal_relocs
+ s
->reloc_count
;
2337 while (internal_relocs
< end
)
2339 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2340 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (ibfd
);
2341 unsigned long r_symndx
;
2342 struct elf_link_hash_entry
*h
;
2344 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2345 sym_hashes
= elf_sym_hashes (ibfd
);
2346 r_symndx
= ELF32_R_SYM (internal_relocs
->r_info
);
2348 if (r_symndx
< symtab_hdr
->sh_info
)
2353 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2354 while (h
->root
.type
== bfd_link_hash_indirect
2355 || h
->root
.type
== bfd_link_hash_warning
)
2356 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2359 /* Don't generate entries for weak symbols. */
2360 if (!h
|| (h
&& h
->root
.type
!= bfd_link_hash_undefweak
))
2362 if (!discarded_section (s
) && !((bfd_get_section_flags (ibfd
, s
) & SEC_ALLOC
) == 0))
2364 switch (ELF32_R_TYPE (internal_relocs
->r_info
))
2377 struct weak_symbol_list
*current
, *new_entry
;
2378 /* Is this symbol already in the list? */
2379 for (current
= list_start
; current
; current
= current
->next
)
2381 if (!strcmp (current
->name
, h
->root
.root
.string
))
2384 if (!current
&& !discarded_section (s
) && (bfd_get_section_flags (ibfd
, s
) & SEC_ALLOC
))
2386 /* Will this have an entry in the GOT. */
2387 if (ELF32_R_TYPE (internal_relocs
->r_info
) == R_LM32_16_GOT
)
2389 /* Create a new entry. */
2390 new_entry
= malloc (sizeof (struct weak_symbol_list
));
2393 new_entry
->name
= h
->root
.root
.string
;
2394 new_entry
->next
= NULL
;
2396 if (list_start
== NULL
)
2398 list_start
= new_entry
;
2399 list_end
= new_entry
;
2403 list_end
->next
= new_entry
;
2404 list_end
= new_entry
;
2406 /* Increase count of undefined weak symbols in the got. */
2422 list_end
= list_start
->next
;
2424 list_start
= list_end
;
2427 /* Size sections. */
2428 lm32fdpic_fixup32_section (info
)->size
= (r32_count
+ (htab
->sgot
->size
/ 4) - rgot_weak_count
+ 1) * 4;
2429 if (lm32fdpic_fixup32_section (info
)->size
== 0)
2430 lm32fdpic_fixup32_section (info
)->flags
|= SEC_EXCLUDE
;
2433 lm32fdpic_fixup32_section (info
)->contents
=
2434 bfd_zalloc (dynobj
, lm32fdpic_fixup32_section (info
)->size
);
2435 if (lm32fdpic_fixup32_section (info
)->contents
== NULL
)
2443 /* Create dynamic sections when linking against a dynamic object. */
2446 lm32_elf_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
2448 struct elf_lm32_link_hash_table
*htab
;
2449 flagword flags
, pltflags
;
2451 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2452 int ptralign
= 2; /* 32bit */
2454 htab
= lm32_elf_hash_table (info
);
2458 /* Make sure we have a GOT - For the case where we have a dynamic object
2459 but none of the relocs in check_relocs */
2460 if (! create_got_section (abfd
, info
))
2462 if (IS_FDPIC (abfd
) && (htab
->sfixup32
== NULL
))
2464 if (! create_rofixup_section (abfd
, info
))
2468 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2469 .rel[a].bss sections. */
2470 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
2471 | SEC_LINKER_CREATED
);
2474 pltflags
|= SEC_CODE
;
2475 if (bed
->plt_not_loaded
)
2476 pltflags
&= ~ (SEC_LOAD
| SEC_HAS_CONTENTS
);
2477 if (bed
->plt_readonly
)
2478 pltflags
|= SEC_READONLY
;
2480 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
2483 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
2486 if (bed
->want_plt_sym
)
2488 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
2490 struct bfd_link_hash_entry
*bh
= NULL
;
2491 struct elf_link_hash_entry
*h
;
2493 if (! (_bfd_generic_link_add_one_symbol
2494 (info
, abfd
, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL
, s
,
2495 (bfd_vma
) 0, NULL
, FALSE
,
2496 get_elf_backend_data (abfd
)->collect
, &bh
)))
2498 h
= (struct elf_link_hash_entry
*) bh
;
2500 h
->type
= STT_OBJECT
;
2501 htab
->root
.hplt
= h
;
2504 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2508 s
= bfd_make_section_anyway_with_flags (abfd
,
2509 bed
->default_use_rela_p
2510 ? ".rela.plt" : ".rel.plt",
2511 flags
| SEC_READONLY
);
2514 || ! bfd_set_section_alignment (abfd
, s
, ptralign
))
2517 if (htab
->sgot
== NULL
2518 && ! create_got_section (abfd
, info
))
2521 if (bed
->want_dynbss
)
2523 /* The .dynbss section is a place to put symbols which are defined
2524 by dynamic objects, are referenced by regular objects, and are
2525 not functions. We must allocate space for them in the process
2526 image and use a R_*_COPY reloc to tell the dynamic linker to
2527 initialize them at run time. The linker script puts the .dynbss
2528 section into the .bss section of the final image. */
2529 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
2530 SEC_ALLOC
| SEC_LINKER_CREATED
);
2534 /* The .rel[a].bss section holds copy relocs. This section is not
2535 normally needed. We need to create it here, though, so that the
2536 linker will map it to an output section. We can't just create it
2537 only if we need it, because we will not know whether we need it
2538 until we have seen all the input files, and the first time the
2539 main linker code calls BFD after examining all the input files
2540 (size_dynamic_sections) the input sections have already been
2541 mapped to the output sections. If the section turns out not to
2542 be needed, we can discard it later. We will never need this
2543 section when generating a shared object, since they do not use
2547 s
= bfd_make_section_anyway_with_flags (abfd
,
2548 (bed
->default_use_rela_p
2549 ? ".rela.bss" : ".rel.bss"),
2550 flags
| SEC_READONLY
);
2553 || ! bfd_set_section_alignment (abfd
, s
, ptralign
))
2561 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2564 lm32_elf_copy_indirect_symbol (struct bfd_link_info
*info
,
2565 struct elf_link_hash_entry
*dir
,
2566 struct elf_link_hash_entry
*ind
)
2568 struct elf_lm32_link_hash_entry
* edir
;
2569 struct elf_lm32_link_hash_entry
* eind
;
2571 edir
= (struct elf_lm32_link_hash_entry
*) dir
;
2572 eind
= (struct elf_lm32_link_hash_entry
*) ind
;
2574 if (eind
->dyn_relocs
!= NULL
)
2576 if (edir
->dyn_relocs
!= NULL
)
2578 struct elf_lm32_dyn_relocs
**pp
;
2579 struct elf_lm32_dyn_relocs
*p
;
2581 /* Add reloc counts against the indirect sym to the direct sym
2582 list. Merge any entries against the same section. */
2583 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
;)
2585 struct elf_lm32_dyn_relocs
*q
;
2587 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2588 if (q
->sec
== p
->sec
)
2590 q
->pc_count
+= p
->pc_count
;
2591 q
->count
+= p
->count
;
2598 *pp
= edir
->dyn_relocs
;
2601 edir
->dyn_relocs
= eind
->dyn_relocs
;
2602 eind
->dyn_relocs
= NULL
;
2605 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2609 lm32_elf_always_size_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2611 if (!info
->relocatable
)
2613 if (!bfd_elf_stack_segment_size (output_bfd
, info
,
2614 "__stacksize", DEFAULT_STACK_SIZE
))
2617 asection
*sec
= bfd_get_section_by_name (output_bfd
, ".stack");
2619 sec
->size
= info
->stacksize
>= 0 ? info
->stacksize
: 0;
2626 lm32_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
2628 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
2629 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
2632 BFD_ASSERT (!elf_flags_init (obfd
)
2633 || elf_elfheader (obfd
)->e_flags
== elf_elfheader (ibfd
)->e_flags
);
2635 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
2636 elf_flags_init (obfd
) = TRUE
;
2638 /* Copy object attributes. */
2639 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
2646 lm32_elf_fdpic_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
2650 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
2651 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
2654 if (! lm32_elf_copy_private_bfd_data (ibfd
, obfd
))
2657 if (! elf_tdata (ibfd
) || ! elf_tdata (ibfd
)->phdr
2658 || ! elf_tdata (obfd
) || ! elf_tdata (obfd
)->phdr
)
2661 /* Copy the stack size. */
2662 for (i
= 0; i
< elf_elfheader (ibfd
)->e_phnum
; i
++)
2663 if (elf_tdata (ibfd
)->phdr
[i
].p_type
== PT_GNU_STACK
)
2665 Elf_Internal_Phdr
*iphdr
= &elf_tdata (ibfd
)->phdr
[i
];
2667 for (i
= 0; i
< elf_elfheader (obfd
)->e_phnum
; i
++)
2668 if (elf_tdata (obfd
)->phdr
[i
].p_type
== PT_GNU_STACK
)
2670 memcpy (&elf_tdata (obfd
)->phdr
[i
], iphdr
, sizeof (*iphdr
));
2672 /* Rewrite the phdrs, since we're only called after they were first written. */
2673 if (bfd_seek (obfd
, (bfd_signed_vma
) get_elf_backend_data (obfd
)
2674 ->s
->sizeof_ehdr
, SEEK_SET
) != 0
2675 || get_elf_backend_data (obfd
)->s
->write_out_phdrs (obfd
, elf_tdata (obfd
)->phdr
,
2676 elf_elfheader (obfd
)->e_phnum
) != 0)
2688 #define ELF_ARCH bfd_arch_lm32
2689 #define ELF_TARGET_ID LM32_ELF_DATA
2690 #define ELF_MACHINE_CODE EM_LATTICEMICO32
2691 #define ELF_MAXPAGESIZE 0x1000
2693 #define TARGET_BIG_SYM bfd_elf32_lm32_vec
2694 #define TARGET_BIG_NAME "elf32-lm32"
2696 #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup
2697 #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup
2698 #define elf_info_to_howto lm32_info_to_howto_rela
2699 #define elf_info_to_howto_rel 0
2700 #define elf_backend_rela_normal 1
2701 #define elf_backend_object_p lm32_elf_object_p
2702 #define elf_backend_final_write_processing lm32_elf_final_write_processing
2703 #define elf_backend_stack_align 8
2704 #define elf_backend_can_gc_sections 1
2705 #define elf_backend_can_refcount 1
2706 #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook
2707 #define elf_backend_gc_sweep_hook lm32_elf_gc_sweep_hook
2708 #define elf_backend_plt_readonly 1
2709 #define elf_backend_want_got_plt 1
2710 #define elf_backend_want_plt_sym 0
2711 #define elf_backend_got_header_size 12
2712 #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create
2713 #define elf_backend_check_relocs lm32_elf_check_relocs
2714 #define elf_backend_reloc_type_class lm32_elf_reloc_type_class
2715 #define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol
2716 #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections
2717 #define elf_backend_omit_section_dynsym ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
2718 #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections
2719 #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections
2720 #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol
2721 #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol
2722 #define elf_backend_relocate_section lm32_elf_relocate_section
2724 #include "elf32-target.h"
2726 #undef ELF_MAXPAGESIZE
2727 #define ELF_MAXPAGESIZE 0x4000
2730 #undef TARGET_BIG_SYM
2731 #define TARGET_BIG_SYM bfd_elf32_lm32fdpic_vec
2732 #undef TARGET_BIG_NAME
2733 #define TARGET_BIG_NAME "elf32-lm32fdpic"
2735 #define elf32_bed elf32_lm32fdpic_bed
2737 #undef elf_backend_always_size_sections
2738 #define elf_backend_always_size_sections lm32_elf_always_size_sections
2739 #undef bfd_elf32_bfd_copy_private_bfd_data
2740 #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data
2742 #include "elf32-target.h"