1 /* BFD back-end for ARM COFF files.
2 Copyright 1990, 91, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
3 Written by Cygnus Support.
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 #include "coff/internal.h"
35 #define APCS_26_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_26)
36 #define APCS_FLOAT_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_FLOAT)
37 #define PIC_FLAG( abfd ) (coff_data (abfd)->flags & F_PIC)
38 #define APCS_SET( abfd ) (coff_data (abfd)->flags & F_APCS_SET)
39 #define SET_APCS_FLAGS( abfd, flgs) (coff_data (abfd)->flags = \
40 (coff_data (abfd)->flags & ~ (F_APCS_26 | F_APCS_FLOAT | F_PIC)) \
41 | (flgs | F_APCS_SET))
42 #define INTERWORK_FLAG( abfd ) (coff_data (abfd)->flags & F_INTERWORK)
43 #define INTERWORK_SET( abfd ) (coff_data (abfd)->flags & F_INTERWORK_SET)
44 #define SET_INTERWORK_FLAG( abfd, flg ) (coff_data (abfd)->flags = \
45 (coff_data (abfd)->flags & ~ F_INTERWORK) \
46 | (flg | F_INTERWORK_SET))
49 static boolean coff_arm_relocate_section
50 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
51 struct internal_reloc
*, struct internal_syment
*, asection
**));
53 static bfd_reloc_status_type
54 aoutarm_fix_pcrel_26_done
PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
,
55 asection
*, bfd
*, char **));
57 static bfd_reloc_status_type
58 aoutarm_fix_pcrel_26
PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
,
59 asection
*, bfd
*, char **));
61 static bfd_reloc_status_type
62 coff_thumb_pcrel_23
PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
,
63 asection
*, bfd
*, char **));
65 static bfd_reloc_status_type
66 coff_thumb_pcrel_12
PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
,
67 asection
*, bfd
*, char **));
69 static bfd_reloc_status_type
70 coff_thumb_pcrel_9
PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
,
71 asection
*, bfd
*, char **));
73 static bfd_reloc_status_type
74 coff_arm_reloc
PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*,
78 coff_arm_adjust_symndx
PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*,
79 asection
*, struct internal_reloc
*,
82 /* The linker script knows the section names for placement.
83 The entry_names are used to do simple name mangling on the stubs.
84 Given a function name, and its type, the stub can be found. The
85 name can be changed. The only requirement is the %s be present.
88 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
89 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
91 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
92 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
94 /* Used by the assembler. */
95 static bfd_reloc_status_type
96 coff_arm_reloc (abfd
, reloc_entry
, symbol
, data
, input_section
, output_bfd
,
102 asection
*input_section
;
104 char **error_message
;
107 if (output_bfd
== (bfd
*) NULL
)
108 return bfd_reloc_continue
;
110 diff
= reloc_entry
->addend
;
113 x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))
117 reloc_howto_type
*howto
= reloc_entry
->howto
;
118 unsigned char *addr
= (unsigned char *) data
+ reloc_entry
->address
;
124 char x
= bfd_get_8 (abfd
, addr
);
126 bfd_put_8 (abfd
, x
, addr
);
132 short x
= bfd_get_16 (abfd
, addr
);
134 bfd_put_16 (abfd
, x
, addr
);
140 long x
= bfd_get_32 (abfd
, addr
);
142 bfd_put_32 (abfd
, x
, addr
);
151 /* Now let bfd_perform_relocation finish everything up. */
152 return bfd_reloc_continue
;
155 #define TARGET_UNDERSCORE '_'
158 #define PCRELOFFSET true
161 /* These most certainly belong somewhere else. Just had to get rid of
162 the manifest constants in the code. */
176 #define ARM_THUMB9 12
177 #define ARM_THUMB12 13
178 #define ARM_THUMB23 14
180 static reloc_howto_type aoutarm_std_reloc_howto
[] =
182 /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
183 HOWTO(ARM_8
, /* type */
187 false, /* pc_relative */
189 complain_overflow_bitfield
, /* complain_on_overflow */
190 coff_arm_reloc
, /* special_function */
192 true, /* partial_inplace */
193 0x000000ff, /* src_mask */
194 0x000000ff, /* dst_mask */
195 PCRELOFFSET
/* pcrel_offset */),
202 complain_overflow_bitfield
,
215 complain_overflow_bitfield
,
228 complain_overflow_signed
,
229 aoutarm_fix_pcrel_26
,
241 complain_overflow_signed
,
254 complain_overflow_signed
,
267 complain_overflow_signed
,
280 complain_overflow_signed
,
281 aoutarm_fix_pcrel_26_done
,
295 complain_overflow_bitfield
,
308 complain_overflow_bitfield
,
321 complain_overflow_bitfield
,
334 complain_overflow_signed
,
347 complain_overflow_signed
,
348 coff_thumb_pcrel_12
,
360 complain_overflow_signed
,
361 coff_thumb_pcrel_23
,
369 /* Return true if this relocation should
370 appear in the output .reloc section. */
372 static boolean
in_reloc_p (abfd
, howto
)
374 reloc_howto_type
*howto
;
376 return !howto
->pc_relative
&& howto
->type
!= 11;
381 #define RTYPE2HOWTO(cache_ptr, dst) \
382 (cache_ptr)->howto = aoutarm_std_reloc_howto + (dst)->r_type;
384 #define coff_rtype_to_howto coff_arm_rtype_to_howto
386 static reloc_howto_type
*
387 coff_arm_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
390 struct internal_reloc
*rel
;
391 struct coff_link_hash_entry
*h
;
392 struct internal_syment
*sym
;
395 reloc_howto_type
*howto
;
397 howto
= aoutarm_std_reloc_howto
+ rel
->r_type
;
399 if (rel
->r_type
== ARM_RVA32
)
401 *addendp
-= pe_data(sec
->output_section
->owner
)->pe_opthdr
.ImageBase
;
404 /* The relocation_section function will skip pcrel_offset relocs
405 when doing a relocateable link. However, we want to convert
406 ARM26 to ARM26D relocs if possible. We return a fake howto in
407 this case without pcrel_offset set, and adjust the addend to
409 if (rel
->r_type
== ARM_26
411 && (h
->root
.type
== bfd_link_hash_defined
412 || h
->root
.type
== bfd_link_hash_defweak
)
413 && h
->root
.u
.def
.section
->output_section
== sec
->output_section
)
415 static reloc_howto_type fake_arm26_reloc
=
422 complain_overflow_signed
,
423 aoutarm_fix_pcrel_26
,
430 *addendp
-= rel
->r_vaddr
- sec
->vma
;
431 return & fake_arm26_reloc
;
437 /* Used by the assembler. */
439 static bfd_reloc_status_type
440 aoutarm_fix_pcrel_26_done (abfd
, reloc_entry
, symbol
, data
, input_section
,
441 output_bfd
, error_message
)
443 arelent
*reloc_entry
;
446 asection
*input_section
;
448 char **error_message
;
450 /* This is dead simple at present. */
454 /* Used by the assembler. */
456 static bfd_reloc_status_type
457 aoutarm_fix_pcrel_26 (abfd
, reloc_entry
, symbol
, data
, input_section
,
458 output_bfd
, error_message
)
460 arelent
*reloc_entry
;
463 asection
*input_section
;
465 char **error_message
;
468 bfd_size_type addr
= reloc_entry
->address
;
469 long target
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ addr
);
470 bfd_reloc_status_type flag
= bfd_reloc_ok
;
472 /* If this is an undefined symbol, return error */
473 if (symbol
->section
== &bfd_und_section
474 && (symbol
->flags
& BSF_WEAK
) == 0)
475 return output_bfd
? bfd_reloc_continue
: bfd_reloc_undefined
;
477 /* If the sections are different, and we are doing a partial relocation,
478 just ignore it for now. */
479 if (symbol
->section
->name
!= input_section
->name
480 && output_bfd
!= (bfd
*)NULL
)
481 return bfd_reloc_continue
;
483 relocation
= (target
& 0x00ffffff) << 2;
484 relocation
= (relocation
^ 0x02000000) - 0x02000000; /* Sign extend */
485 relocation
+= symbol
->value
;
486 relocation
+= symbol
->section
->output_section
->vma
;
487 relocation
+= symbol
->section
->output_offset
;
488 relocation
+= reloc_entry
->addend
;
489 relocation
-= input_section
->output_section
->vma
;
490 relocation
-= input_section
->output_offset
;
494 return bfd_reloc_overflow
;
496 /* Check for overflow */
497 if (relocation
& 0x02000000)
499 if ((relocation
& ~0x03ffffff) != ~0x03ffffff)
500 flag
= bfd_reloc_overflow
;
502 else if (relocation
& ~0x03ffffff)
503 flag
= bfd_reloc_overflow
;
505 target
&= ~0x00ffffff;
506 target
|= (relocation
>> 2) & 0x00ffffff;
507 bfd_put_32 (abfd
, target
, (bfd_byte
*) data
+ addr
);
509 /* Now the ARM magic... Change the reloc type so that it is marked as done.
510 Strictly this is only necessary if we are doing a partial relocation. */
511 reloc_entry
->howto
= &aoutarm_std_reloc_howto
[ARM_26D
];
516 typedef enum {bunknown
, b9
, b12
, b23
} thumb_pcrel_branchtype
;
518 static bfd_reloc_status_type
519 coff_thumb_pcrel_common (abfd
, reloc_entry
, symbol
, data
, input_section
,
520 output_bfd
, error_message
, btype
)
522 arelent
*reloc_entry
;
525 asection
*input_section
;
527 char **error_message
;
528 thumb_pcrel_branchtype btype
;
531 bfd_size_type addr
= reloc_entry
->address
;
532 long target
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ addr
);
533 bfd_reloc_status_type flag
= bfd_reloc_ok
;
538 /* NOTE: This routine is currently used by GAS, but not by the link
546 signbit
= 0x00000100;
552 signbit
= 0x00000800;
558 signbit
= 0x00400000;
565 /* If this is an undefined symbol, return error */
566 if (symbol
->section
== &bfd_und_section
567 && (symbol
->flags
& BSF_WEAK
) == 0)
568 return output_bfd
? bfd_reloc_continue
: bfd_reloc_undefined
;
570 /* If the sections are different, and we are doing a partial relocation,
571 just ignore it for now. */
572 if (symbol
->section
->name
!= input_section
->name
573 && output_bfd
!= (bfd
*)NULL
)
574 return bfd_reloc_continue
;
580 relocation
= ((target
& dstmsk
) << 1);
584 if (bfd_big_endian (abfd
))
585 relocation
= ((target
& 0x7ff) << 1) | ((target
& 0x07ff0000) >> 4);
587 relocation
= ((target
& 0x7ff) << 12) | ((target
& 0x07ff0000) >> 15);
591 relocation
= (relocation
^ signbit
) - signbit
; /* Sign extend */
592 relocation
+= symbol
->value
;
593 relocation
+= symbol
->section
->output_section
->vma
;
594 relocation
+= symbol
->section
->output_offset
;
595 relocation
+= reloc_entry
->addend
;
596 relocation
-= input_section
->output_section
->vma
;
597 relocation
-= input_section
->output_offset
;
601 return bfd_reloc_overflow
;
603 /* Check for overflow */
604 if (relocation
& signbit
)
606 if ((relocation
& ~offmsk
) != ~offmsk
)
607 flag
= bfd_reloc_overflow
;
609 else if (relocation
& ~offmsk
)
610 flag
= bfd_reloc_overflow
;
617 target
|= (relocation
>> 1);
621 if (bfd_big_endian (abfd
))
622 target
|= ((relocation
& 0xfff) >> 1) | ((relocation
<< 4) & 0x07ff0000);
624 target
|= ((relocation
& 0xffe) << 15) | ((relocation
>> 12) & 0x7ff);
628 bfd_put_32 (abfd
, target
, (bfd_byte
*) data
+ addr
);
630 /* Now the ARM magic... Change the reloc type so that it is marked as done.
631 Strictly this is only necessary if we are doing a partial relocation. */
632 reloc_entry
->howto
= & aoutarm_std_reloc_howto
[ARM_26D
];
634 /* TODO: We should possibly have DONE entries for the THUMB PCREL relocations */
638 static bfd_reloc_status_type
639 coff_thumb_pcrel_23 (abfd
, reloc_entry
, symbol
, data
, input_section
,
640 output_bfd
, error_message
)
642 arelent
*reloc_entry
;
645 asection
*input_section
;
647 char **error_message
;
649 return coff_thumb_pcrel_common (abfd
, reloc_entry
, symbol
, data
,
650 input_section
, output_bfd
, error_message
, b23
);
653 static bfd_reloc_status_type
654 coff_thumb_pcrel_12 (abfd
, reloc_entry
, symbol
, data
, input_section
,
655 output_bfd
, error_message
)
657 arelent
*reloc_entry
;
660 asection
*input_section
;
662 char **error_message
;
664 return coff_thumb_pcrel_common (abfd
, reloc_entry
, symbol
, data
,
665 input_section
, output_bfd
, error_message
, b12
);
668 static bfd_reloc_status_type
669 coff_thumb_pcrel_9 (abfd
, reloc_entry
, symbol
, data
, input_section
,
670 output_bfd
, error_message
)
672 arelent
*reloc_entry
;
675 asection
*input_section
;
677 char **error_message
;
679 return coff_thumb_pcrel_common (abfd
, reloc_entry
, symbol
, data
,
680 input_section
, output_bfd
, error_message
, b9
);
684 static CONST
struct reloc_howto_struct
*
685 arm_reloc_type_lookup(abfd
,code
)
687 bfd_reloc_code_real_type code
;
689 #define ASTD(i,j) case i: return &aoutarm_std_reloc_howto[j]
690 if (code
== BFD_RELOC_CTOR
)
691 switch (bfd_get_arch_info (abfd
)->bits_per_address
)
696 default: return (CONST
struct reloc_howto_struct
*) 0;
701 ASTD (BFD_RELOC_8
, ARM_8
);
702 ASTD (BFD_RELOC_16
, ARM_16
);
703 ASTD (BFD_RELOC_32
, ARM_32
);
704 ASTD (BFD_RELOC_ARM_PCREL_BRANCH
, ARM_26
);
705 ASTD (BFD_RELOC_8_PCREL
, ARM_DISP8
);
706 ASTD (BFD_RELOC_16_PCREL
, ARM_DISP16
);
707 ASTD (BFD_RELOC_32_PCREL
, ARM_DISP32
);
708 ASTD (BFD_RELOC_RVA
, ARM_RVA32
);
709 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9
, ARM_THUMB9
);
710 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12
, ARM_THUMB12
);
711 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23
, ARM_THUMB23
);
712 default: return (CONST
struct reloc_howto_struct
*) 0;
717 #define coff_bfd_reloc_type_lookup arm_reloc_type_lookup
719 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
720 #define COFF_PAGE_SIZE 0x1000
721 /* Turn a howto into a reloc nunmber */
723 #define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
724 #define BADMAG(x) ARMBADMAG(x)
725 #define ARM 1 /* Customize coffcode.h */
727 /* The set of global variables that mark the total size of each kind
729 static long int global_thumb_glue_size
= 0;
730 static long int global_arm_glue_size
= 0;
732 static bfd
* bfd_of_glue_owner
= NULL
;
734 /* some typedefs for holding instructions */
735 typedef unsigned long int insn32
;
736 typedef unsigned short int insn16
;
739 /* The thumb form of a long branch is a bit finicky, because the offset
740 encoding is split over two fields, each in it's own instruction. They
741 can occur in any order. So given a thumb form of long branch, and an
742 offset, insert the offset into the thumb branch and return finished
745 It takes two thumb instructions to encode the target address. Each has
746 11 bits to invest. The upper 11 bits are stored in one (identifed by
747 H-0.. see below), the lower 11 bits are stored in the other (identified
750 Combine together and shifted left by 1 (it's a half word address) and
754 H-0, upper address-0 = 000
756 H-1, lower address-0 = 800
758 They can be ordered either way, but the arm tools I've seen always put
759 the lower one first. It probably doesn't matter. krk@cygnus.com
761 XXX: Actually the order does matter. The second instruction (H-1)
762 moves the computed address into the PC, so it must be the second one
763 in the sequence. The problem, however is that whilst little endian code
764 stores the instructions in HI then LOW order, big endian code does the
765 reverse. nickc@cygnus.com */
767 #define LOW_HI_ORDER 0xF800F000
768 #define HI_LOW_ORDER 0xF000F800
771 insert_thumb_branch (br_insn
, rel_off
)
775 unsigned int low_bits
;
776 unsigned int high_bits
;
779 BFD_ASSERT((rel_off
& 1) != 1);
781 rel_off
>>= 1; /* half word aligned address */
782 low_bits
= rel_off
& 0x000007FF; /* the bottom 11 bits */
783 high_bits
= ( rel_off
>> 11 ) & 0x000007FF; /* the top 11 bits */
785 if ((br_insn
& LOW_HI_ORDER
) == LOW_HI_ORDER
)
786 br_insn
= LOW_HI_ORDER
| (low_bits
<< 16) | high_bits
;
787 else if ((br_insn
& HI_LOW_ORDER
) == HI_LOW_ORDER
)
788 br_insn
= HI_LOW_ORDER
| (high_bits
<< 16) | low_bits
;
790 abort(); /* error - not a valid branch instruction form */
792 /* FIXME: abort is probably not the right call. krk@cygnus.com */
798 static struct coff_link_hash_entry
*
799 find_thumb_glue (info
, name
, input_bfd
)
800 struct bfd_link_info
* info
;
805 struct coff_link_hash_entry
* myh
= 0;
808 bfd_malloc (strlen (name
) + strlen (THUMB2ARM_GLUE_ENTRY_NAME
)));
810 BFD_ASSERT (tmp_name
);
812 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
814 myh
= coff_link_hash_lookup (coff_hash_table (info
),
819 _bfd_error_handler ("%s: unable to find THUMB glue '%s' for `%s'",
820 bfd_get_filename (input_bfd
), tmp_name
, name
);
828 static struct coff_link_hash_entry
*
829 find_arm_glue (info
, name
, input_bfd
)
830 struct bfd_link_info
* info
;
835 struct coff_link_hash_entry
*myh
= 0;
838 bfd_malloc (strlen (name
) + strlen (ARM2THUMB_GLUE_ENTRY_NAME
)));
840 BFD_ASSERT (tmp_name
);
842 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
844 myh
= coff_link_hash_lookup (coff_hash_table (info
),
850 _bfd_error_handler ("%s: unable to find ARM glue '%s' for `%s'",
851 bfd_get_filename (input_bfd
), tmp_name
, name
);
867 .word func @ behave as if you saw a ARM_32 reloc
869 ldr ip,8 <__func_addr> e59fc000
875 #define ARM2THUMB_GLUE_SIZE 12
877 a2t1_ldr_insn
= 0xe59fc000,
878 a2t2_bx_r12_insn
= 0xe12fff1c,
879 a2t3_func_addr_insn
= 0x00000001;
890 __func_change_to_arm:
900 #define THUMB2ARM_GLUE_SIZE 8
902 t2a1_bx_pc_insn
= 0x4778,
903 t2a2_noop_insn
= 0x46c0;
905 t2a3_b_insn
= 0xea000000;
908 We should really create new local (static) symbols in destination
909 object for each stub we create. We should also create local
910 (static) symbols within the stubs when switching between ARM and
911 Thumb code. This will ensure that the debugger and disassembler
912 can present a better view of stubs.
914 We can treat stubs like literal sections, and for the THUMB9 ones
915 (short addressing range) we should be able to insert the stubs
916 between sections. i.e. the simplest approach (since relocations
917 are done on a section basis) is to dump the stubs at the end of
918 processing a section. That way we can always try and minimise the
919 offset to and from a stub. However, this does not map well onto
920 the way that the linker/BFD does its work: mapping all input
921 sections to output sections via the linker script before doing
924 Unfortunately it may be easier to just to disallow short range
925 Thumb->ARM stubs (i.e. no conditional inter-working branches,
926 only branch-and-link (BL) calls. This will simplify the processing
927 since we can then put all of the stubs into their own section.
930 On a different subject, rather than complaining when a
931 branch cannot fit in the number of bits available for the
932 instruction we should generate a trampoline stub (needed to
933 address the complete 32bit address space). */
935 /* The standard COFF backend linker does not cope with the special
936 Thumb BRANCH23 relocation. The alternative would be to split the
937 BRANCH23 into seperate HI23 and LO23 relocations. However, it is a
938 bit simpler simply providing our own relocation driver. */
940 /* The reloc processing routine for the ARM/Thumb COFF linker. NOTE:
941 This code is a very slightly modified copy of
942 _bfd_coff_generic_relocate_section. It would be a much more
943 maintainable solution to have a MACRO that could be expanded within
944 _bfd_coff_generic_relocate_section that would only be provided for
945 ARM/Thumb builds. It is only the code marked THUMBEXTENSION that
946 is different from the original. */
949 coff_arm_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
950 contents
, relocs
, syms
, sections
)
952 struct bfd_link_info
*info
;
954 asection
*input_section
;
956 struct internal_reloc
*relocs
;
957 struct internal_syment
*syms
;
960 struct internal_reloc
* rel
;
961 struct internal_reloc
* relend
;
964 relend
= rel
+ input_section
->reloc_count
;
966 for (; rel
< relend
; rel
++)
970 struct coff_link_hash_entry
*h
;
971 struct internal_syment
*sym
;
974 reloc_howto_type
*howto
;
975 bfd_reloc_status_type rstat
;
978 symndx
= rel
->r_symndx
;
987 h
= obj_coff_sym_hashes (input_bfd
)[symndx
];
991 /* COFF treats common symbols in one of two ways. Either the
992 size of the symbol is included in the section contents, or it
993 is not. We assume that the size is not included, and force
994 the rtype_to_howto function to adjust the addend as needed. */
996 if (sym
!= NULL
&& sym
->n_scnum
!= 0)
997 addend
= - sym
->n_value
;
1002 howto
= bfd_coff_rtype_to_howto (input_bfd
, input_section
, rel
, h
,
1007 /* If we are doing a relocateable link, then we can just ignore
1008 a PC relative reloc that is pcrel_offset. It will already
1009 have the correct value. If this is not a relocateable link,
1010 then we should ignore the symbol value. */
1011 if (howto
->pc_relative
&& howto
->pcrel_offset
)
1013 if (info
->relocateable
)
1015 if (sym
!= NULL
&& sym
->n_scnum
!= 0)
1016 addend
+= sym
->n_value
;
1019 /* If we are doing a relocateable link, then we can just ignore
1020 a PC relative reloc that is pcrel_offset. It will already
1021 have the correct value. */
1022 if (info
->relocateable
1023 && howto
->pc_relative
1024 && howto
->pcrel_offset
)
1035 sec
= bfd_abs_section_ptr
;
1040 sec
= sections
[symndx
];
1041 val
= (sec
->output_section
->vma
1042 + sec
->output_offset
1049 #if 1 /* THUMBEXTENSION */
1050 /* We don't output the stubs if we are generating a
1051 relocatable output file, since we may as well leave the
1052 stub generation to the final linker pass. If we fail to
1053 verify that the name is defined, we'll try to build stubs
1054 for an undefined name... */
1055 if (! info
->relocateable
1056 && ( h
->root
.type
== bfd_link_hash_defined
1057 || h
->root
.type
== bfd_link_hash_defweak
))
1060 asection
* h_sec
= h
->root
.u
.def
.section
;
1061 const char * name
= h
->root
.root
.string
;
1063 /* h locates the symbol referenced in the reloc. */
1064 h_val
= (h
->root
.u
.def
.value
1065 + h_sec
->output_section
->vma
1066 + h_sec
->output_offset
);
1068 if (howto
->type
== ARM_26
)
1070 if ( h
->class == C_THUMBSTATFUNC
1071 || h
->class == C_THUMBEXTFUNC
)
1073 /* Arm code calling a Thumb function */
1074 signed long int final_disp
;
1075 unsigned long int tmp
;
1079 unsigned long int return_address
;
1080 long int ret_offset
;
1082 struct coff_link_hash_entry
* myh
;
1084 myh
= find_arm_glue (info
, name
, input_bfd
);
1088 my_offset
= myh
->root
.u
.def
.value
;
1090 s
= bfd_get_section_by_name (bfd_of_glue_owner
,
1091 ARM2THUMB_GLUE_SECTION_NAME
);
1092 BFD_ASSERT (s
!= NULL
);
1093 BFD_ASSERT (s
->contents
!= NULL
);
1095 if ((my_offset
& 0x01) == 0x01)
1097 if (h_sec
->owner
!= NULL
1098 && INTERWORK_SET (h_sec
->owner
)
1099 && ! INTERWORK_FLAG (h_sec
->owner
))
1102 ("%s(%s): warning: interworking not enabled.",
1103 bfd_get_filename (h_sec
->owner
), name
);
1105 (" first occurrence: %s: arm call to thumb",
1106 bfd_get_filename (input_bfd
));
1110 myh
->root
.u
.def
.value
= my_offset
;
1112 bfd_put_32 (output_bfd
, a2t1_ldr_insn
, s
->contents
+ my_offset
);
1114 bfd_put_32 (output_bfd
, a2t2_bx_r12_insn
, s
->contents
+ my_offset
+ 4);
1116 /* It's a thumb address. Add the low order bit. */
1117 bfd_put_32 (output_bfd
, h_val
| a2t3_func_addr_insn
, s
->contents
+ my_offset
+ 8);
1120 BFD_ASSERT (my_offset
<= global_arm_glue_size
);
1122 tmp
= bfd_get_32 (input_bfd
, contents
+ rel
->r_vaddr
- input_section
->vma
);
1124 tmp
= tmp
& 0xFF000000;
1126 /* Somehow these are both 4 too far, so subtract 8. */
1130 + s
->output_section
->vma
1131 - (input_section
->output_offset
1132 + input_section
->output_section
->vma
1136 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
1138 bfd_put_32 (output_bfd
, tmp
, contents
+ rel
->r_vaddr
- input_section
->vma
);
1144 /* Note: We used to check for ARM_THUMB9 and ARM_THUMB12 */
1145 else if (howto
->type
== ARM_THUMB23
)
1147 if ( h
->class == C_EXT
1148 || h
->class == C_STAT
1149 || h
->class == C_LABEL
)
1151 /* Thumb code calling an ARM function */
1152 unsigned long int return_address
;
1153 signed long int final_disp
;
1156 unsigned long int tmp
;
1157 long int ret_offset
;
1158 struct coff_link_hash_entry
* myh
;
1160 myh
= find_thumb_glue (info
, name
, input_bfd
);
1164 my_offset
= myh
->root
.u
.def
.value
;
1166 s
= bfd_get_section_by_name (bfd_of_glue_owner
,
1167 THUMB2ARM_GLUE_SECTION_NAME
);
1169 BFD_ASSERT (s
!= NULL
);
1170 BFD_ASSERT (s
->contents
!= NULL
);
1172 if ((my_offset
& 0x01) == 0x01)
1174 if (h_sec
->owner
!= NULL
1175 && INTERWORK_SET (h_sec
->owner
)
1176 && ! INTERWORK_FLAG (h_sec
->owner
))
1179 ("%s(%s): warning: interworking not enabled.",
1180 bfd_get_filename (h_sec
->owner
), name
);
1182 (" first occurrence: %s: thumb call to arm",
1183 bfd_get_filename (input_bfd
));
1186 myh
->root
.u
.def
.value
= my_offset
;
1188 bfd_put_16 (output_bfd
, t2a1_bx_pc_insn
,
1189 s
->contents
+ my_offset
);
1191 bfd_put_16 (output_bfd
, t2a2_noop_insn
,
1192 s
->contents
+ my_offset
+ 2);
1195 ((signed)h_val
) - /* Address of destination of the stub */
1196 ((signed)(s
->output_offset
/* Offset from the start of the current section to the start of the stubs. */
1197 + my_offset
/* Offset of the start of this stub from the start of the stubs. */
1198 + s
->output_section
->vma
) /* Address of the start of the current section. */
1199 + 4 /* The branch instruction is 4 bytes into the stub. */
1200 + 8); /* ARM branches work from the pc of the instruction + 8. */
1202 bfd_put_32 (output_bfd
,
1203 t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
1204 s
->contents
+ my_offset
+ 4);
1207 BFD_ASSERT (my_offset
<= global_thumb_glue_size
);
1209 /* Now go back and fix up the original bl insn to point here. */
1213 - (input_section
->output_offset
1217 tmp
= bfd_get_32 (input_bfd
, contents
+ rel
->r_vaddr
- input_section
->vma
);
1219 bfd_put_32 (output_bfd
,
1220 insert_thumb_branch (tmp
, ret_offset
),
1221 contents
+ rel
->r_vaddr
- input_section
->vma
);
1228 /* If the relocation type and destination symbol does not
1229 fall into one of the above categories, then we can just
1230 perform a direct link. */
1233 rstat
= bfd_reloc_ok
;
1235 #endif /* THUMBEXTENSION */
1236 if ( h
->root
.type
== bfd_link_hash_defined
1237 || h
->root
.type
== bfd_link_hash_defweak
)
1241 sec
= h
->root
.u
.def
.section
;
1242 val
= (h
->root
.u
.def
.value
1243 + sec
->output_section
->vma
1244 + sec
->output_offset
);
1247 else if (! info
->relocateable
)
1249 if (! ((*info
->callbacks
->undefined_symbol
)
1250 (info
, h
->root
.root
.string
, input_bfd
, input_section
,
1251 rel
->r_vaddr
- input_section
->vma
)))
1256 if (info
->base_file
)
1258 /* Emit a reloc if the backend thinks it needs it. */
1259 if (sym
&& pe_data(output_bfd
)->in_reloc_p(output_bfd
, howto
))
1261 /* relocation to a symbol in a section which
1262 isn't absolute - we output the address here
1264 bfd_vma addr
= rel
->r_vaddr
1265 - input_section
->vma
1266 + input_section
->output_offset
1267 + input_section
->output_section
->vma
;
1268 if (coff_data(output_bfd
)->pe
)
1269 addr
-= pe_data(output_bfd
)->pe_opthdr
.ImageBase
;
1270 /* FIXME: Shouldn't 4 be sizeof (addr)? */
1271 fwrite (&addr
, 1,4, (FILE *) info
->base_file
);
1275 #if 1 /* THUMBEXTENSION */
1278 /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
1279 else if (! info
->relocateable
1280 && howto
->type
== ARM_THUMB23
)
1282 /* This is pretty much a copy of what the default
1283 _bfd_final_link_relocate and _bfd_relocate_contents
1284 routines do to perform a relocation, with special
1285 processing for the split addressing of the Thumb BL
1286 instruction. Again, it would probably be simpler adding a
1287 ThumbBRANCH23 specific macro expansion into the default
1290 bfd_vma address
= rel
->r_vaddr
- input_section
->vma
;
1292 if (address
> input_section
->_raw_size
)
1293 rstat
= bfd_reloc_outofrange
;
1296 bfd_vma relocation
= val
+ addend
;
1297 int size
= bfd_get_reloc_size (howto
);
1298 boolean overflow
= false;
1299 bfd_byte
* location
= contents
+ address
;
1300 bfd_vma x
= bfd_get_32 (input_bfd
, location
);
1301 bfd_vma src_mask
= 0x007FFFFE;
1302 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
1303 bfd_signed_vma reloc_signed_min
= ~reloc_signed_max
;
1305 bfd_signed_vma signed_check
;
1307 bfd_signed_vma signed_add
;
1309 BFD_ASSERT (size
== 4);
1311 /* howto->pc_relative should be TRUE for type 14 BRANCH23 */
1312 relocation
-= (input_section
->output_section
->vma
1313 + input_section
->output_offset
);
1315 /* howto->pcrel_offset should be TRUE for type 14 BRANCH23 */
1316 relocation
-= address
;
1318 /* No need to negate the relocation with BRANCH23. */
1319 /* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */
1320 /* howto->rightshift == 1 */
1321 /* Drop unwanted bits from the value we are relocating to. */
1323 check
= relocation
>> howto
->rightshift
;
1325 /* If this is a signed value, the rightshift just dropped
1326 leading 1 bits (assuming twos complement). */
1327 if ((bfd_signed_vma
) relocation
>= 0)
1328 signed_check
= check
;
1330 signed_check
= (check
1332 & ~((bfd_vma
) - 1 >> howto
->rightshift
)));
1334 /* Get the value from the object file. */
1335 if (bfd_big_endian (input_bfd
))
1337 add
= (((x
) & 0x07ff0000) >> 4) | (((x
) & 0x7ff) << 1);
1341 add
= ((((x
) & 0x7ff) << 12) | (((x
) & 0x07ff0000) >> 15));
1344 /* Get the value from the object file with an appropriate sign.
1345 The expression involving howto->src_mask isolates the upper
1346 bit of src_mask. If that bit is set in the value we are
1347 adding, it is negative, and we subtract out that number times
1348 two. If src_mask includes the highest possible bit, then we
1349 can not get the upper bit, but that does not matter since
1350 signed_add needs no adjustment to become negative in that
1355 if ((add
& (((~ src_mask
) >> 1) & src_mask
)) != 0)
1356 signed_add
-= (((~ src_mask
) >> 1) & src_mask
) << 1;
1358 /* Add the value from the object file, shifted so that it is a
1360 /* howto->bitpos == 0 */
1362 signed_check
+= signed_add
;
1363 relocation
+= signed_add
;
1365 BFD_ASSERT (howto
->complain_on_overflow
== complain_overflow_signed
);
1367 /* Assumes two's complement. */
1368 if ( signed_check
> reloc_signed_max
1369 || signed_check
< reloc_signed_min
)
1372 /* Put RELOCATION into the correct bits: */
1374 if (bfd_big_endian (input_bfd
))
1376 relocation
= (((relocation
& 0xffe) >> 1) | ((relocation
<< 4) & 0x07ff0000));
1380 relocation
= (((relocation
& 0xffe) << 15) | ((relocation
>> 12) & 0x7ff));
1383 /* Add RELOCATION to the correct bits of X: */
1384 x
= ((x
& ~howto
->dst_mask
) | relocation
);
1386 /* Put the relocated value back in the object file: */
1387 bfd_put_32 (input_bfd
, x
, location
);
1389 rstat
= overflow
? bfd_reloc_overflow
: bfd_reloc_ok
;
1393 #endif /* THUMBEXTENSION */
1394 rstat
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1396 rel
->r_vaddr
- input_section
->vma
,
1398 #if 1 /* THUMBEXTENSION */
1400 Is this the best way to fix up thumb addresses? krk@cygnus.com
1401 Probably not, but it works, and if it works it don't need fixing! nickc@cygnus.com */
1402 /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
1403 if (! info
->relocateable
1404 && rel
->r_type
== ARM_32
)
1406 /* Determine if we need to set the bottom bit of a relocated address
1407 because the address is the address of a Thumb code symbol. */
1409 int patchit
= false;
1412 && ( h
->class == C_THUMBSTATFUNC
1413 || h
->class == C_THUMBEXTFUNC
))
1417 else if (sym
!= NULL
1418 && sym
->n_scnum
> N_UNDEF
)
1420 /* No hash entry - use the symbol instead. */
1422 if ( sym
->n_sclass
== C_THUMBSTATFUNC
1423 || sym
->n_sclass
== C_THUMBEXTFUNC
)
1429 bfd_byte
* location
= contents
+ rel
->r_vaddr
- input_section
->vma
;
1430 bfd_vma x
= bfd_get_32 (input_bfd
, location
);
1432 bfd_put_32 (input_bfd
, x
| 1, location
);
1435 #endif /* THUMBEXTENSION */
1443 case bfd_reloc_outofrange
:
1444 (*_bfd_error_handler
)
1445 ("%s: bad reloc address 0x%lx in section `%s'",
1446 bfd_get_filename (input_bfd
),
1447 (unsigned long) rel
->r_vaddr
,
1448 bfd_get_section_name (input_bfd
, input_section
));
1450 case bfd_reloc_overflow
:
1453 char buf
[SYMNMLEN
+ 1];
1458 name
= h
->root
.root
.string
;
1461 name
= _bfd_coff_internal_syment_name (input_bfd
, sym
, buf
);
1466 if (! ((*info
->callbacks
->reloc_overflow
)
1467 (info
, name
, howto
->name
, (bfd_vma
) 0, input_bfd
,
1468 input_section
, rel
->r_vaddr
- input_section
->vma
)))
1477 #if defined COFF_IMAGE_WITH_PE || ! defined COFF_WITH_PE
1479 arm_allocate_interworking_sections (info
)
1480 struct bfd_link_info
*info
;
1485 static char test_char
= '1';
1488 if (global_arm_glue_size
!= 0)
1490 BFD_ASSERT (bfd_of_glue_owner
!= NULL
);
1492 s
= bfd_get_section_by_name (bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
1494 BFD_ASSERT (s
!= NULL
);
1496 foo
= (bfd_byte
*) bfd_alloc (bfd_of_glue_owner
, global_arm_glue_size
);
1498 memset (foo
, test_char
, global_arm_glue_size
);
1501 s
->_raw_size
= s
->_cooked_size
= global_arm_glue_size
;
1505 if (global_thumb_glue_size
!= 0)
1507 BFD_ASSERT (bfd_of_glue_owner
!= NULL
);
1509 s
= bfd_get_section_by_name (bfd_of_glue_owner
, THUMB2ARM_GLUE_SECTION_NAME
);
1511 BFD_ASSERT (s
!= NULL
);
1513 foo
= (bfd_byte
*) bfd_alloc (bfd_of_glue_owner
, global_thumb_glue_size
);
1515 memset (foo
, test_char
, global_thumb_glue_size
);
1518 s
->_raw_size
= s
->_cooked_size
= global_thumb_glue_size
;
1526 record_arm_to_thumb_glue (info
, h
)
1527 struct bfd_link_info
* info
;
1528 struct coff_link_hash_entry
* h
;
1530 const char * name
= h
->root
.root
.string
;
1531 register asection
* s
;
1533 struct coff_link_hash_entry
* myh
;
1536 BFD_ASSERT (bfd_of_glue_owner
!= NULL
);
1538 s
= bfd_get_section_by_name (bfd_of_glue_owner
,
1539 ARM2THUMB_GLUE_SECTION_NAME
);
1541 BFD_ASSERT (s
!= NULL
);
1543 tmp_name
= ((char *)
1544 bfd_malloc (strlen (name
) + strlen (ARM2THUMB_GLUE_ENTRY_NAME
)));
1546 BFD_ASSERT (tmp_name
);
1548 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
1550 myh
= coff_link_hash_lookup (coff_hash_table (info
),
1552 false, false, true);
1557 return; /* we've already seen this guy */
1561 /* The only trick here is using global_arm_glue_size as the value. Even
1562 though the section isn't allocated yet, this is where we will be putting
1565 bfd_coff_link_add_one_symbol (info
, bfd_of_glue_owner
, tmp_name
,
1566 BSF_EXPORT
| BSF_GLOBAL
,
1567 s
, global_arm_glue_size
+ 1,
1569 (struct bfd_link_hash_entry
**) & myh
);
1571 global_arm_glue_size
+= ARM2THUMB_GLUE_SIZE
;
1579 record_thumb_to_arm_glue (info
, h
)
1580 struct bfd_link_info
* info
;
1581 struct coff_link_hash_entry
* h
;
1583 const char * name
= h
->root
.root
.string
;
1584 register asection
* s
;
1586 struct coff_link_hash_entry
* myh
;
1588 BFD_ASSERT (bfd_of_glue_owner
!= NULL
);
1590 s
= bfd_get_section_by_name (bfd_of_glue_owner
, THUMB2ARM_GLUE_SECTION_NAME
);
1592 BFD_ASSERT (s
!= NULL
);
1594 tmp_name
= (char *) bfd_malloc (strlen (name
) + strlen (THUMB2ARM_GLUE_ENTRY_NAME
));
1596 BFD_ASSERT (tmp_name
);
1598 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
1600 myh
= coff_link_hash_lookup (coff_hash_table (info
),
1602 false, false, true);
1607 return; /* we've already seen this guy */
1610 bfd_coff_link_add_one_symbol (info
, bfd_of_glue_owner
, tmp_name
,
1611 BSF_LOCAL
, s
, global_thumb_glue_size
+ 1,
1613 (struct bfd_link_hash_entry
**) & myh
);
1615 /* If we mark it 'thumb', the disassembler will do a better job. */
1616 myh
->class = C_THUMBEXTFUNC
;
1620 #define CHANGE_TO_ARM "__%s_change_to_arm"
1622 tmp_name
= ((char *)
1623 bfd_malloc (strlen (name
) + strlen (CHANGE_TO_ARM
)));
1625 BFD_ASSERT (tmp_name
);
1627 sprintf (tmp_name
, CHANGE_TO_ARM
, name
);
1631 /* Now allocate another symbol to switch back to arm mode. */
1632 bfd_coff_link_add_one_symbol (info
, bfd_of_glue_owner
, tmp_name
,
1633 BSF_LOCAL
, s
, global_thumb_glue_size
+ 4,
1635 (struct bfd_link_hash_entry
**) & myh
);
1639 global_thumb_glue_size
+= THUMB2ARM_GLUE_SIZE
;
1645 arm_process_before_allocation (abfd
, info
)
1647 struct bfd_link_info
* info
;
1651 /* If we are only performing a partial link do not bother
1652 to construct any glue. */
1653 if (info
->relocateable
)
1656 /* Here we have a bfd that is to be included on the link. We have a hook
1657 to do reloc rummaging, before section sizes are nailed down. */
1659 _bfd_coff_get_external_symbols (abfd
);
1661 /* Rummage around all the relocs and map the glue vectors. */
1662 sec
= abfd
->sections
;
1667 for (; sec
!= NULL
; sec
= sec
->next
)
1669 struct internal_reloc
* i
;
1670 struct internal_reloc
* rel
;
1672 if (sec
->reloc_count
== 0)
1675 /* Load the relocs. */
1676 /* FIXME: there may be a storage leak here. */
1678 i
= _bfd_coff_read_internal_relocs (abfd
, sec
, 1, 0, 0, 0);
1680 BFD_ASSERT (i
!= 0);
1682 for (rel
= i
; rel
< i
+ sec
->reloc_count
; ++rel
)
1684 unsigned short r_type
= rel
->r_type
;
1686 struct coff_link_hash_entry
* h
;
1688 symndx
= rel
->r_symndx
;
1690 /* If the relocation is not against a symbol it cannot concern us. */
1694 h
= obj_coff_sym_hashes (abfd
)[symndx
];
1696 /* If the relocation is against a static symbol it must be within
1697 the current section and so cannot be a cross ARM/Thumb relocation. */
1704 /* This one is a call from arm code. We need to look up
1705 the target of the call. If it is a thumb target, we
1708 if (h
->class == C_THUMBEXTFUNC
)
1709 record_arm_to_thumb_glue (info
, h
);
1713 /* This one is a call from thumb code. We used to look
1714 for ARM_THUMB9 and ARM_THUMB12 as well. We need to look
1715 up the target of the call. If it is an arm target, we
1716 insert glue. If the symbol does not exist it will be
1717 given a class of C_EXT and so we will generate a stub
1718 for it. This is not really a problem, since the link
1719 is doomed anyway. */
1726 record_thumb_to_arm_glue (info
, h
);
1741 #endif /* COFF_IMAGE_WITH_PE or not COFF_WITH_PE */
1743 #define coff_relocate_section coff_arm_relocate_section
1745 /* When doing a relocateable link, we want to convert ARM26 relocs
1746 into ARM26D relocs. */
1749 coff_arm_adjust_symndx (obfd
, info
, ibfd
, sec
, irel
, adjustedp
)
1751 struct bfd_link_info
*info
;
1754 struct internal_reloc
*irel
;
1757 if (irel
->r_type
== 3)
1759 struct coff_link_hash_entry
*h
;
1761 h
= obj_coff_sym_hashes (ibfd
)[irel
->r_symndx
];
1763 && (h
->root
.type
== bfd_link_hash_defined
1764 || h
->root
.type
== bfd_link_hash_defweak
)
1765 && h
->root
.u
.def
.section
->output_section
== sec
->output_section
)
1772 #if defined COFF_IMAGE_WITH_PE || ! defined COFF_WITH_PE
1773 /* Called when merging the private data areas of two BFDs.
1774 This is important as it allows us to detect if we are
1775 attempting to merge binaries compiled for different ARM
1776 targets, eg different CPUs or differents APCS's. */
1779 coff_arm_bfd_merge_private_bfd_data (ibfd
, obfd
)
1783 BFD_ASSERT (ibfd
!= NULL
&& obfd
!= NULL
);
1788 /* If the two formats are different we cannot merge anything.
1789 This is not an error, since it is permissable to change the
1790 input and output formats. */
1791 if (ibfd
->xvec
!= obfd
->xvec
)
1794 /* Verify that the APCS is the same for the two BFDs */
1795 if (APCS_SET (ibfd
))
1797 if (APCS_SET (obfd
))
1799 /* If the src and dest have different APCS flag bits set, fail. */
1800 if (APCS_26_FLAG (obfd
) != APCS_26_FLAG (ibfd
))
1803 ("%s: ERROR: compiled for APCS-%d whereas target %s uses APCS-%d",
1804 bfd_get_filename (ibfd
), APCS_26_FLAG (ibfd
) ? 26 : 32,
1805 bfd_get_filename (obfd
), APCS_26_FLAG (obfd
) ? 26 : 32
1808 bfd_set_error (bfd_error_wrong_format
);
1812 if (APCS_FLOAT_FLAG (obfd
) != APCS_FLOAT_FLAG (ibfd
))
1815 ("%s: ERROR: passes floats in %s registers whereas target %s uses %s registers",
1816 bfd_get_filename (ibfd
), APCS_FLOAT_FLAG (ibfd
) ? "float" : "integer",
1817 bfd_get_filename (obfd
), APCS_FLOAT_FLAG (obfd
) ? "float" : "integer"
1820 bfd_set_error (bfd_error_wrong_format
);
1824 if (PIC_FLAG (obfd
) != PIC_FLAG (ibfd
))
1827 ("%s: ERROR: compiled as %s code, whereas target %s is %s",
1828 bfd_get_filename (ibfd
), PIC_FLAG (ibfd
) ? "position independent" : "absoluste position",
1829 bfd_get_filename (obfd
), PIC_FLAG (obfd
) ? "position independent" : "absoluste position"
1832 bfd_set_error (bfd_error_wrong_format
);
1838 SET_APCS_FLAGS (obfd
, APCS_26_FLAG (ibfd
) | APCS_FLOAT_FLAG (ibfd
) | PIC_FLAG (ibfd
));
1840 /* Set up the arch and fields as well as these are probably wrong. */
1841 bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
1845 /* Check the interworking support. */
1846 if (INTERWORK_SET (ibfd
))
1848 if (INTERWORK_SET (obfd
))
1850 /* If the src and dest differ in their interworking issue a warning. */
1851 if (INTERWORK_FLAG (obfd
) != INTERWORK_FLAG (ibfd
))
1854 ("Warning: input file %s %s interworking, whereas %s does%s",
1855 bfd_get_filename (ibfd
),
1856 INTERWORK_FLAG (ibfd
) ? "supports" : "does not support",
1857 bfd_get_filename (obfd
),
1858 INTERWORK_FLAG (obfd
) ? "." : " not."
1864 SET_INTERWORK_FLAG (obfd
, INTERWORK_FLAG (ibfd
));
1872 /* Display the flags field. */
1875 coff_arm_bfd_print_private_bfd_data (abfd
, ptr
)
1879 FILE * file
= (FILE *) ptr
;
1881 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
)
1883 fprintf (file
, "private flags = %x", coff_data (abfd
)->flags
);
1885 if (APCS_SET (abfd
))
1886 fprintf (file
, ": [APCS-%d] [floats passed in %s registers] [%s]",
1887 APCS_26_FLAG (abfd
) ? 26 : 32,
1888 APCS_FLOAT_FLAG (abfd
) ? "float" : "integer",
1889 PIC_FLAG (abfd
) ? "position independent" : "absolute position"
1892 if (INTERWORK_SET (abfd
))
1893 fprintf (file
, ": [interworking %ssupported]",
1894 INTERWORK_FLAG (abfd
) ? "" : "not " );
1902 /* Copies the given flags into the coff_tdata.flags field.
1903 Typically these flags come from the f_flags[] field of
1904 the COFF filehdr structure, which contains important,
1905 target specific information. */
1908 coff_arm_bfd_set_private_flags (abfd
, flags
)
1914 BFD_ASSERT (abfd
!= NULL
);
1916 flag
= (flags
& F_APCS26
) ? F_APCS_26
: 0;
1918 /* Make sure that the APCS field has not been initialised to the opposite value. */
1920 && ( (APCS_26_FLAG (abfd
) != flag
)
1921 || (APCS_FLOAT_FLAG (abfd
) != (flags
& F_APCS_FLOAT
))
1922 || (PIC_FLAG (abfd
) != (flags
& F_PIC
))
1926 flag
|= (flags
& (F_APCS_FLOAT
| F_PIC
));
1928 SET_APCS_FLAGS (abfd
, flag
);
1930 flag
= (flags
& F_INTERWORK
);
1932 /* If either the flags or the BFD do support interworking then do not set the interworking flag. */
1933 if (INTERWORK_SET (abfd
) && (INTERWORK_FLAG (abfd
) != flag
))
1936 SET_INTERWORK_FLAG (abfd
, flag
);
1942 /* Copy the important parts of the target specific data
1943 from one instance of a BFD to another. */
1946 coff_arm_bfd_copy_private_bfd_data (src
, dest
)
1950 BFD_ASSERT (src
!= NULL
&& dest
!= NULL
);
1955 /* If the destination is not in the same format as the source, do not do the copy. */
1956 if (src
->xvec
!= dest
->xvec
)
1959 /* copy the flags field */
1962 if (APCS_SET (dest
))
1964 /* If the src and dest have different APCS flag bits set, fail. */
1965 if (APCS_26_FLAG (dest
) != APCS_26_FLAG (src
))
1968 if (APCS_FLOAT_FLAG (dest
) != APCS_FLOAT_FLAG (src
))
1971 if (PIC_FLAG (dest
) != PIC_FLAG (src
))
1975 SET_APCS_FLAGS (dest
, APCS_26_FLAG (src
) | APCS_FLOAT_FLAG (src
) | PIC_FLAG (src
));
1978 if (INTERWORK_SET (src
))
1980 if (INTERWORK_SET (dest
))
1982 /* If the src and dest have different interworking flags then turn off the interworking bit. */
1983 if (INTERWORK_FLAG (dest
) != INTERWORK_FLAG (src
))
1984 SET_INTERWORK_FLAG (dest
, 0);
1988 SET_INTERWORK_FLAG (dest
, INTERWORK_FLAG (src
));
1994 #endif /* COFF_IMAGE_WITH_PE or not COFF_WITH_PE */
1996 /* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX
1997 *must* match the definitions on gcc/config/arm/semi.h. */
1998 #define LOCAL_LABEL_PREFIX "."
1999 #define USER_LABEL_PREFIX "_"
2002 coff_arm_is_local_label_name (abfd
, name
)
2006 #ifdef LOCAL_LABEL_PREFIX
2007 /* If there is a prefix for local labels then look for this.
2008 If the prefix exists, but it is empty, then ignore the test. */
2010 if (LOCAL_LABEL_PREFIX
[0] != 0)
2012 if (strncmp (name
, LOCAL_LABEL_PREFIX
, strlen (LOCAL_LABEL_PREFIX
)) == 0)
2016 #ifdef USER_LABEL_PREFIX
2017 if (USER_LABEL_PREFIX
[0] != 0)
2019 if (strncmp (name
, USER_LABEL_PREFIX
, strlen (USER_LABEL_PREFIX
)) == 0)
2024 /* devo/gcc/config/dbxcoff.h defines ASM_OUTPUT_SOURCE_LINE to generate local line numbers as .LM<number>, so treat these as local. */
2028 case 'L': return true;
2029 case '.': return (name
[1] == 'L' && name
[2] == 'M') ? true : false;
2030 default: return false; /* Cannot make our minds up - default to false so that it will not be stripped by accident. */
2034 #define coff_bfd_is_local_label_name coff_arm_is_local_label_name
2035 #define coff_adjust_symndx coff_arm_adjust_symndx
2037 #define coff_link_output_has_begun coff_arm_link_output_has_begun
2038 #define coff_final_link_postscript coff_arm_final_link_postscript
2039 #define coff_bfd_merge_private_bfd_data coff_arm_bfd_merge_private_bfd_data
2040 #define coff_bfd_print_private_bfd_data coff_arm_bfd_print_private_bfd_data
2041 #define coff_bfd_set_private_flags coff_arm_bfd_set_private_flags
2042 #define coff_bfd_copy_private_bfd_data coff_arm_bfd_copy_private_bfd_data
2044 extern boolean
coff_arm_final_link_postscript ();
2045 extern boolean
coff_arm_bfd_set_private_flags ();
2046 extern boolean
coff_arm_bfd_merge_private_bfd_data ();
2047 extern boolean
coff_arm_link_output_has_begun ();
2049 #if defined COFF_IMAGE_WITH_PE || ! defined COFF_WITH_PE
2050 /* This piece of machinery exists only to guarantee that the bfd that holds
2051 the glue section is written last.
2053 This does depend on bfd_make_section attaching a new section to the
2054 end of the section list for the bfd.
2059 coff_arm_link_output_has_begun (sub
)
2062 return (sub
->output_has_begun
|| sub
== bfd_of_glue_owner
);
2066 coff_arm_final_link_postscript (abfd
, pfinfo
)
2068 struct coff_final_link_info
* pfinfo
;
2070 if (bfd_of_glue_owner
!= NULL
)
2072 if (! _bfd_coff_link_input_bfd (pfinfo
, bfd_of_glue_owner
))
2074 bfd_of_glue_owner
->output_has_begun
= true;
2078 #endif /* COFF_IMAGE_WITH_PE or not COFF_WITH_PE */
2080 #define coff_SWAP_sym_in arm_bfd_coff_swap_sym_in
2082 static void coff_swap_sym_in
PARAMS ((bfd
*, PTR
, PTR
));
2084 /* Sepcial version of symbol swapper, used to grab a bfd
2085 onto which the glue sections can be attached. */
2087 arm_bfd_coff_swap_sym_in (abfd
, ext1
, in1
)
2093 register asection
* s
;
2095 /* Do the normal swap in. */
2096 coff_swap_sym_in (abfd
, ext1
, in1
);
2098 if (bfd_of_glue_owner
!= NULL
) /* we already have a toc, so go home */
2101 /* Save the bfd for later allocation. */
2102 bfd_of_glue_owner
= abfd
;
2104 s
= bfd_get_section_by_name (bfd_of_glue_owner
,
2105 ARM2THUMB_GLUE_SECTION_NAME
);
2109 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
2111 s
= bfd_make_section (bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
2114 || !bfd_set_section_flags (bfd_of_glue_owner
, s
, flags
)
2115 || !bfd_set_section_alignment (bfd_of_glue_owner
, s
, 2))
2117 /* FIXME: set appropriate bfd error */
2122 s
= bfd_get_section_by_name (bfd_of_glue_owner
, THUMB2ARM_GLUE_SECTION_NAME
);
2126 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
2128 s
= bfd_make_section (bfd_of_glue_owner
, THUMB2ARM_GLUE_SECTION_NAME
);
2131 || !bfd_set_section_flags (bfd_of_glue_owner
, s
, flags
)
2132 || !bfd_set_section_alignment (bfd_of_glue_owner
, s
, 2))
2134 /* FIXME: set appropriate bfd error krk@cygnus.com */
2142 #include "coffcode.h"
2145 #ifdef TARGET_LITTLE_SYM
2148 armcoff_little_vec
=
2151 #ifdef TARGET_LITTLE_NAME
2156 bfd_target_coff_flavour
,
2157 BFD_ENDIAN_LITTLE
, /* data byte order is little */
2158 BFD_ENDIAN_LITTLE
, /* header byte order is little */
2160 (HAS_RELOC
| EXEC_P
| /* object flags */
2161 HAS_LINENO
| HAS_DEBUG
|
2162 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| D_PAGED
),
2164 #ifndef COFF_WITH_PE
2165 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* section flags */
2167 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
/* section flags */
2168 | SEC_LINK_ONCE
| SEC_LINK_DUPLICATES
),
2171 #ifdef TARGET_UNDERSCORE
2172 TARGET_UNDERSCORE
, /* leading underscore */
2174 0, /* leading underscore */
2176 '/', /* ar_pad_char */
2177 15, /* ar_max_namelen */
2179 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
2180 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
2181 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
2182 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
2183 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
2184 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* hdrs */
2186 /* Note that we allow an object file to be treated as a core file as well. */
2187 {_bfd_dummy_target
, coff_object_p
, /* bfd_check_format */
2188 bfd_generic_archive_p
, coff_object_p
},
2189 {bfd_false
, coff_mkobject
, _bfd_generic_mkarchive
, /* bfd_set_format */
2191 {bfd_false
, coff_write_object_contents
, /* bfd_write_contents */
2192 _bfd_write_archive_contents
, bfd_false
},
2194 BFD_JUMP_TABLE_GENERIC (coff
),
2195 BFD_JUMP_TABLE_COPY (coff
),
2196 BFD_JUMP_TABLE_CORE (_bfd_nocore
),
2197 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff
),
2198 BFD_JUMP_TABLE_SYMBOLS (coff
),
2199 BFD_JUMP_TABLE_RELOCS (coff
),
2200 BFD_JUMP_TABLE_WRITE (coff
),
2201 BFD_JUMP_TABLE_LINK (coff
),
2202 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),
2204 (PTR
) & bfd_coff_std_swap_table
,
2208 #ifdef TARGET_BIG_SYM
2214 #ifdef TARGET_BIG_NAME
2219 bfd_target_coff_flavour
,
2220 BFD_ENDIAN_BIG
, /* data byte order is big */
2221 BFD_ENDIAN_BIG
, /* header byte order is big */
2223 (HAS_RELOC
| EXEC_P
| /* object flags */
2224 HAS_LINENO
| HAS_DEBUG
|
2225 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| D_PAGED
),
2227 #ifndef COFF_WITH_PE
2228 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* section flags */
2230 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
/* section flags */
2231 | SEC_LINK_ONCE
| SEC_LINK_DUPLICATES
),
2234 #ifdef TARGET_UNDERSCORE
2235 TARGET_UNDERSCORE
, /* leading underscore */
2237 0, /* leading underscore */
2239 '/', /* ar_pad_char */
2240 15, /* ar_max_namelen */
2242 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
2243 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
2244 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* data */
2245 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
2246 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
2247 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* hdrs */
2249 /* Note that we allow an object file to be treated as a core file as well. */
2250 {_bfd_dummy_target
, coff_object_p
, /* bfd_check_format */
2251 bfd_generic_archive_p
, coff_object_p
},
2252 {bfd_false
, coff_mkobject
, _bfd_generic_mkarchive
, /* bfd_set_format */
2254 {bfd_false
, coff_write_object_contents
, /* bfd_write_contents */
2255 _bfd_write_archive_contents
, bfd_false
},
2257 BFD_JUMP_TABLE_GENERIC (coff
),
2258 BFD_JUMP_TABLE_COPY (coff
),
2259 BFD_JUMP_TABLE_CORE (_bfd_nocore
),
2260 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff
),
2261 BFD_JUMP_TABLE_SYMBOLS (coff
),
2262 BFD_JUMP_TABLE_RELOCS (coff
),
2263 BFD_JUMP_TABLE_WRITE (coff
),
2264 BFD_JUMP_TABLE_LINK (coff
),
2265 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),
2267 (PTR
) & bfd_coff_std_swap_table
,