1 /* BFD back-end for ARM COFF files.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 #include "coff/internal.h"
37 /* Macros for manipulation the bits in the flags field of the coff data
39 #define APCS_26_FLAG(abfd) \
40 (coff_data (abfd)->flags & F_APCS_26)
42 #define APCS_FLOAT_FLAG(abfd) \
43 (coff_data (abfd)->flags & F_APCS_FLOAT)
45 #define PIC_FLAG(abfd) \
46 (coff_data (abfd)->flags & F_PIC)
48 #define APCS_SET(abfd) \
49 (coff_data (abfd)->flags & F_APCS_SET)
51 #define SET_APCS_FLAGS(abfd, flgs) \
54 coff_data (abfd)->flags &= ~(F_APCS_26 | F_APCS_FLOAT | F_PIC); \
55 coff_data (abfd)->flags |= (flgs) | F_APCS_SET; \
59 #define INTERWORK_FLAG(abfd) \
60 (coff_data (abfd)->flags & F_INTERWORK)
62 #define INTERWORK_SET(abfd) \
63 (coff_data (abfd)->flags & F_INTERWORK_SET)
65 #define SET_INTERWORK_FLAG(abfd, flg) \
68 coff_data (abfd)->flags &= ~F_INTERWORK; \
69 coff_data (abfd)->flags |= (flg) | F_INTERWORK_SET; \
74 #define NUM_ELEM(a) ((sizeof (a)) / sizeof ((a)[0]))
77 typedef enum {bunknown
, b9
, b12
, b23
} thumb_pcrel_branchtype
;
78 /* some typedefs for holding instructions */
79 typedef unsigned long int insn32
;
80 typedef unsigned short int insn16
;
82 /* Forward declarations for stupid compilers. */
83 static boolean coff_arm_relocate_section
84 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
85 struct internal_reloc
*, struct internal_syment
*, asection
**));
86 static bfd_reloc_status_type aoutarm_fix_pcrel_26_done
87 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
88 static bfd_reloc_status_type aoutarm_fix_pcrel_26
89 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
91 static bfd_reloc_status_type coff_thumb_pcrel_23
92 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
93 static bfd_reloc_status_type coff_thumb_pcrel_9
94 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
95 static insn32 insert_thumb_branch
96 PARAMS ((insn32
, int));
98 static bfd_reloc_status_type coff_thumb_pcrel_12
99 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
100 static bfd_reloc_status_type coff_arm_reloc
101 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
102 static boolean coff_arm_adjust_symndx
103 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*,
104 asection
*, struct internal_reloc
*, boolean
*));
105 static reloc_howto_type
* coff_arm_rtype_to_howto
106 PARAMS ((bfd
*, asection
*, struct internal_reloc
*,
107 struct coff_link_hash_entry
*, struct internal_syment
*,
109 static bfd_reloc_status_type coff_thumb_pcrel_common
110 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **,
111 thumb_pcrel_branchtype
));
112 static const struct reloc_howto_struct
* coff_arm_reloc_type_lookup
113 PARAMS ((bfd
*, bfd_reloc_code_real_type
));
114 static struct bfd_link_hash_table
* coff_arm_link_hash_table_create
116 static struct coff_link_hash_entry
* find_thumb_glue
117 PARAMS ((struct bfd_link_info
*, const char *, bfd
*));
118 static struct coff_link_hash_entry
* find_arm_glue
119 PARAMS ((struct bfd_link_info
*, const char *, bfd
*));
120 #ifndef COFF_IMAGE_WITH_PE
121 static void record_arm_to_thumb_glue
122 PARAMS ((struct bfd_link_info
*, struct coff_link_hash_entry
*));
124 static void record_thumb_to_arm_glue
125 PARAMS ((struct bfd_link_info
*, struct coff_link_hash_entry
*));
128 static boolean coff_arm_merge_private_bfd_data
129 PARAMS ((bfd
*, bfd
*));
130 static boolean coff_arm_print_private_bfd_data
131 PARAMS ((bfd
*, PTR
));
132 static boolean _bfd_coff_arm_set_private_flags
133 PARAMS ((bfd
*, flagword
));
134 static boolean coff_arm_copy_private_bfd_data
135 PARAMS ((bfd
*, bfd
*));
136 static boolean coff_arm_is_local_label_name
137 PARAMS ((bfd
*, const char *));
138 static boolean coff_arm_link_output_has_begun
139 PARAMS ((bfd
*, struct coff_final_link_info
*));
140 static boolean coff_arm_final_link_postscript
141 PARAMS ((bfd
*, struct coff_final_link_info
*));
142 static void arm_emit_base_file_entry
143 PARAMS ((struct bfd_link_info
*, bfd
*, asection
*, bfd_vma
));
145 /* The linker script knows the section names for placement.
146 The entry_names are used to do simple name mangling on the stubs.
147 Given a function name, and its type, the stub can be found. The
148 name can be changed. The only requirement is the %s be present. */
150 #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
151 #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
153 #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
154 #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
156 /* Used by the assembler. */
158 static bfd_reloc_status_type
159 coff_arm_reloc (abfd
, reloc_entry
, symbol
, data
, input_section
, output_bfd
,
162 arelent
*reloc_entry
;
163 asymbol
*symbol ATTRIBUTE_UNUSED
;
165 asection
*input_section ATTRIBUTE_UNUSED
;
167 char **error_message ATTRIBUTE_UNUSED
;
170 if (output_bfd
== (bfd
*) NULL
)
171 return bfd_reloc_continue
;
173 diff
= reloc_entry
->addend
;
176 x = ((x & ~howto->dst_mask) \
177 | (((x & howto->src_mask) + diff) & howto->dst_mask))
181 reloc_howto_type
*howto
= reloc_entry
->howto
;
182 unsigned char *addr
= (unsigned char *) data
+ reloc_entry
->address
;
188 char x
= bfd_get_8 (abfd
, addr
);
190 bfd_put_8 (abfd
, x
, addr
);
196 short x
= bfd_get_16 (abfd
, addr
);
198 bfd_put_16 (abfd
, (bfd_vma
) x
, addr
);
204 long x
= bfd_get_32 (abfd
, addr
);
206 bfd_put_32 (abfd
, (bfd_vma
) x
, addr
);
215 /* Now let bfd_perform_relocation finish everything up. */
216 return bfd_reloc_continue
;
219 /* If USER_LABEL_PREFIX is defined as "_" (see coff_arm_is_local_label_name()
220 in this file), then TARGET_UNDERSCORE should be defined, otherwise it
222 #ifndef TARGET_UNDERSCORE
223 #define TARGET_UNDERSCORE '_'
227 #define PCRELOFFSET true
230 /* These most certainly belong somewhere else. Just had to get rid of
231 the manifest constants in the code. */
244 #define ARM_THUMB9 12
245 #define ARM_THUMB12 13
246 #define ARM_THUMB23 14
258 #define ARM_THUMB12 4
260 #define ARM_SECTION 14
261 #define ARM_SECREL 15
264 static reloc_howto_type aoutarm_std_reloc_howto
[] =
274 complain_overflow_bitfield
,
287 complain_overflow_bitfield
,
300 complain_overflow_signed
,
301 aoutarm_fix_pcrel_26
,
313 complain_overflow_signed
,
314 coff_thumb_pcrel_12
,
326 complain_overflow_dont
,
327 aoutarm_fix_pcrel_26_done
,
347 complain_overflow_bitfield
,
360 complain_overflow_bitfield
,
367 #else /* not ARM_WINCE */
368 HOWTO (ARM_8
, /* type */
372 false, /* pc_relative */
374 complain_overflow_bitfield
, /* complain_on_overflow */
375 coff_arm_reloc
, /* special_function */
377 true, /* partial_inplace */
378 0x000000ff, /* src_mask */
379 0x000000ff, /* dst_mask */
380 PCRELOFFSET
/* pcrel_offset */),
387 complain_overflow_bitfield
,
400 complain_overflow_bitfield
,
413 complain_overflow_signed
,
414 aoutarm_fix_pcrel_26
,
426 complain_overflow_signed
,
439 complain_overflow_signed
,
452 complain_overflow_signed
,
465 complain_overflow_dont
,
466 aoutarm_fix_pcrel_26_done
,
480 complain_overflow_bitfield
,
493 complain_overflow_bitfield
,
506 complain_overflow_bitfield
,
519 complain_overflow_signed
,
532 complain_overflow_signed
,
533 coff_thumb_pcrel_12
,
545 complain_overflow_signed
,
546 coff_thumb_pcrel_23
,
552 #endif /* not ARM_WINCE */
555 #define NUM_RELOCS NUM_ELEM (aoutarm_std_reloc_howto)
558 static boolean in_reloc_p
PARAMS ((bfd
*, reloc_howto_type
*));
559 /* Return true if this relocation should
560 appear in the output .reloc section. */
563 in_reloc_p (abfd
, howto
)
564 bfd
* abfd ATTRIBUTE_UNUSED
;
565 reloc_howto_type
* howto
;
567 return !howto
->pc_relative
&& howto
->type
!= ARM_RVA32
;
571 #define RTYPE2HOWTO(cache_ptr, dst) \
572 (cache_ptr)->howto = \
573 (dst)->r_type < NUM_RELOCS \
574 ? aoutarm_std_reloc_howto + (dst)->r_type \
577 #define coff_rtype_to_howto coff_arm_rtype_to_howto
579 static reloc_howto_type
*
580 coff_arm_rtype_to_howto (abfd
, sec
, rel
, h
, sym
, addendp
)
581 bfd
*abfd ATTRIBUTE_UNUSED
;
583 struct internal_reloc
*rel
;
584 struct coff_link_hash_entry
*h ATTRIBUTE_UNUSED
;
585 struct internal_syment
*sym ATTRIBUTE_UNUSED
;
588 reloc_howto_type
* howto
;
590 if (rel
->r_type
>= NUM_RELOCS
)
593 howto
= aoutarm_std_reloc_howto
+ rel
->r_type
;
595 if (rel
->r_type
== ARM_RVA32
)
596 *addendp
-= pe_data (sec
->output_section
->owner
)->pe_opthdr
.ImageBase
;
601 /* Used by the assembler. */
603 static bfd_reloc_status_type
604 aoutarm_fix_pcrel_26_done (abfd
, reloc_entry
, symbol
, data
, input_section
,
605 output_bfd
, error_message
)
606 bfd
*abfd ATTRIBUTE_UNUSED
;
607 arelent
*reloc_entry ATTRIBUTE_UNUSED
;
608 asymbol
*symbol ATTRIBUTE_UNUSED
;
609 PTR data ATTRIBUTE_UNUSED
;
610 asection
*input_section ATTRIBUTE_UNUSED
;
611 bfd
*output_bfd ATTRIBUTE_UNUSED
;
612 char **error_message ATTRIBUTE_UNUSED
;
614 /* This is dead simple at present. */
618 /* Used by the assembler. */
620 static bfd_reloc_status_type
621 aoutarm_fix_pcrel_26 (abfd
, reloc_entry
, symbol
, data
, input_section
,
622 output_bfd
, error_message
)
624 arelent
*reloc_entry
;
627 asection
*input_section
;
629 char **error_message ATTRIBUTE_UNUSED
;
632 bfd_size_type addr
= reloc_entry
->address
;
633 long target
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ addr
);
634 bfd_reloc_status_type flag
= bfd_reloc_ok
;
636 /* If this is an undefined symbol, return error. */
637 if (symbol
->section
== &bfd_und_section
638 && (symbol
->flags
& BSF_WEAK
) == 0)
639 return output_bfd
? bfd_reloc_continue
: bfd_reloc_undefined
;
641 /* If the sections are different, and we are doing a partial relocation,
642 just ignore it for now. */
643 if (symbol
->section
->name
!= input_section
->name
644 && output_bfd
!= (bfd
*)NULL
)
645 return bfd_reloc_continue
;
647 relocation
= (target
& 0x00ffffff) << 2;
648 relocation
= (relocation
^ 0x02000000) - 0x02000000; /* Sign extend. */
649 relocation
+= symbol
->value
;
650 relocation
+= symbol
->section
->output_section
->vma
;
651 relocation
+= symbol
->section
->output_offset
;
652 relocation
+= reloc_entry
->addend
;
653 relocation
-= input_section
->output_section
->vma
;
654 relocation
-= input_section
->output_offset
;
658 return bfd_reloc_overflow
;
660 /* Check for overflow. */
661 if (relocation
& 0x02000000)
663 if ((relocation
& ~ (bfd_vma
) 0x03ffffff) != ~ (bfd_vma
) 0x03ffffff)
664 flag
= bfd_reloc_overflow
;
666 else if (relocation
& ~(bfd_vma
) 0x03ffffff)
667 flag
= bfd_reloc_overflow
;
669 target
&= ~0x00ffffff;
670 target
|= (relocation
>> 2) & 0x00ffffff;
671 bfd_put_32 (abfd
, (bfd_vma
) target
, (bfd_byte
*) data
+ addr
);
673 /* Now the ARM magic... Change the reloc type so that it is marked as done.
674 Strictly this is only necessary if we are doing a partial relocation. */
675 reloc_entry
->howto
= &aoutarm_std_reloc_howto
[ARM_26D
];
680 static bfd_reloc_status_type
681 coff_thumb_pcrel_common (abfd
, reloc_entry
, symbol
, data
, input_section
,
682 output_bfd
, error_message
, btype
)
684 arelent
*reloc_entry
;
687 asection
*input_section
;
689 char **error_message ATTRIBUTE_UNUSED
;
690 thumb_pcrel_branchtype btype
;
692 bfd_vma relocation
= 0;
693 bfd_size_type addr
= reloc_entry
->address
;
694 long target
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ addr
);
695 bfd_reloc_status_type flag
= bfd_reloc_ok
;
700 /* NOTE: This routine is currently used by GAS, but not by the link
708 signbit
= 0x00000100;
714 signbit
= 0x00000800;
720 signbit
= 0x00400000;
727 /* If this is an undefined symbol, return error. */
728 if (symbol
->section
== &bfd_und_section
729 && (symbol
->flags
& BSF_WEAK
) == 0)
730 return output_bfd
? bfd_reloc_continue
: bfd_reloc_undefined
;
732 /* If the sections are different, and we are doing a partial relocation,
733 just ignore it for now. */
734 if (symbol
->section
->name
!= input_section
->name
735 && output_bfd
!= (bfd
*)NULL
)
736 return bfd_reloc_continue
;
742 relocation
= ((target
& dstmsk
) << 1);
746 if (bfd_big_endian (abfd
))
747 relocation
= ((target
& 0x7ff) << 1) | ((target
& 0x07ff0000) >> 4);
749 relocation
= ((target
& 0x7ff) << 12) | ((target
& 0x07ff0000) >> 15);
756 relocation
= (relocation
^ signbit
) - signbit
; /* Sign extend. */
757 relocation
+= symbol
->value
;
758 relocation
+= symbol
->section
->output_section
->vma
;
759 relocation
+= symbol
->section
->output_offset
;
760 relocation
+= reloc_entry
->addend
;
761 relocation
-= input_section
->output_section
->vma
;
762 relocation
-= input_section
->output_offset
;
766 return bfd_reloc_overflow
;
768 /* Check for overflow. */
769 if (relocation
& signbit
)
771 if ((relocation
& ~offmsk
) != ~offmsk
)
772 flag
= bfd_reloc_overflow
;
774 else if (relocation
& ~offmsk
)
775 flag
= bfd_reloc_overflow
;
782 target
|= (relocation
>> 1);
786 if (bfd_big_endian (abfd
))
787 target
|= (((relocation
& 0xfff) >> 1)
788 | ((relocation
<< 4) & 0x07ff0000));
790 target
|= (((relocation
& 0xffe) << 15)
791 | ((relocation
>> 12) & 0x7ff));
798 bfd_put_32 (abfd
, (bfd_vma
) target
, (bfd_byte
*) data
+ addr
);
800 /* Now the ARM magic... Change the reloc type so that it is marked as done.
801 Strictly this is only necessary if we are doing a partial relocation. */
802 reloc_entry
->howto
= & aoutarm_std_reloc_howto
[ARM_26D
];
804 /* TODO: We should possibly have DONE entries for the THUMB PCREL relocations. */
809 static bfd_reloc_status_type
810 coff_thumb_pcrel_23 (abfd
, reloc_entry
, symbol
, data
, input_section
,
811 output_bfd
, error_message
)
813 arelent
*reloc_entry
;
816 asection
*input_section
;
818 char **error_message
;
820 return coff_thumb_pcrel_common (abfd
, reloc_entry
, symbol
, data
,
821 input_section
, output_bfd
, error_message
,
825 static bfd_reloc_status_type
826 coff_thumb_pcrel_9 (abfd
, reloc_entry
, symbol
, data
, input_section
,
827 output_bfd
, error_message
)
829 arelent
*reloc_entry
;
832 asection
*input_section
;
834 char **error_message
;
836 return coff_thumb_pcrel_common (abfd
, reloc_entry
, symbol
, data
,
837 input_section
, output_bfd
, error_message
,
840 #endif /* not ARM_WINCE */
842 static bfd_reloc_status_type
843 coff_thumb_pcrel_12 (abfd
, reloc_entry
, symbol
, data
, input_section
,
844 output_bfd
, error_message
)
846 arelent
*reloc_entry
;
849 asection
*input_section
;
851 char **error_message
;
853 return coff_thumb_pcrel_common (abfd
, reloc_entry
, symbol
, data
,
854 input_section
, output_bfd
, error_message
,
858 static const struct reloc_howto_struct
*
859 coff_arm_reloc_type_lookup (abfd
, code
)
861 bfd_reloc_code_real_type code
;
863 #define ASTD(i,j) case i: return aoutarm_std_reloc_howto + j
865 if (code
== BFD_RELOC_CTOR
)
866 switch (bfd_get_arch_info (abfd
)->bits_per_address
)
872 return (const struct reloc_howto_struct
*) 0;
878 ASTD (BFD_RELOC_32
, ARM_32
);
879 ASTD (BFD_RELOC_RVA
, ARM_RVA32
);
880 ASTD (BFD_RELOC_ARM_PCREL_BRANCH
, ARM_26
);
881 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12
, ARM_THUMB12
);
883 ASTD (BFD_RELOC_8
, ARM_8
);
884 ASTD (BFD_RELOC_16
, ARM_16
);
885 ASTD (BFD_RELOC_32
, ARM_32
);
886 ASTD (BFD_RELOC_ARM_PCREL_BRANCH
, ARM_26
);
887 ASTD (BFD_RELOC_ARM_PCREL_BLX
, ARM_26
);
888 ASTD (BFD_RELOC_8_PCREL
, ARM_DISP8
);
889 ASTD (BFD_RELOC_16_PCREL
, ARM_DISP16
);
890 ASTD (BFD_RELOC_32_PCREL
, ARM_DISP32
);
891 ASTD (BFD_RELOC_RVA
, ARM_RVA32
);
892 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9
, ARM_THUMB9
);
893 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12
, ARM_THUMB12
);
894 ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23
, ARM_THUMB23
);
895 ASTD (BFD_RELOC_THUMB_PCREL_BLX
, ARM_THUMB23
);
897 default: return (const struct reloc_howto_struct
*) 0;
901 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
902 #define COFF_PAGE_SIZE 0x1000
903 /* Turn a howto into a reloc nunmber */
905 #define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
906 #define BADMAG(x) ARMBADMAG(x)
907 #define ARM 1 /* Customize coffcode.h */
910 /* Make sure that the 'r_offset' field is copied properly
911 so that identical binaries will compare the same. */
912 #define SWAP_IN_RELOC_OFFSET H_GET_32
913 #define SWAP_OUT_RELOC_OFFSET H_PUT_32
916 /* Extend the coff_link_hash_table structure with a few ARM specific fields.
917 This allows us to store global data here without actually creating any
918 global variables, which is a no-no in the BFD world. */
919 struct coff_arm_link_hash_table
921 /* The original coff_link_hash_table structure. MUST be first field. */
922 struct coff_link_hash_table root
;
924 /* The size in bytes of the section containg the Thumb-to-ARM glue. */
925 bfd_size_type thumb_glue_size
;
927 /* The size in bytes of the section containg the ARM-to-Thumb glue. */
928 bfd_size_type arm_glue_size
;
930 /* An arbitary input BFD chosen to hold the glue sections. */
931 bfd
* bfd_of_glue_owner
;
933 /* Support interworking with old, non-interworking aware ARM code. */
934 int support_old_code
;
937 /* Get the ARM coff linker hash table from a link_info structure. */
938 #define coff_arm_hash_table(info) \
939 ((struct coff_arm_link_hash_table *) ((info)->hash))
941 /* Create an ARM coff linker hash table. */
943 static struct bfd_link_hash_table
*
944 coff_arm_link_hash_table_create (abfd
)
947 struct coff_arm_link_hash_table
* ret
;
948 bfd_size_type amt
= sizeof (struct coff_arm_link_hash_table
);
950 ret
= (struct coff_arm_link_hash_table
*) bfd_malloc (amt
);
951 if (ret
== (struct coff_arm_link_hash_table
*) NULL
)
954 if (! _bfd_coff_link_hash_table_init
955 (& ret
->root
, abfd
, _bfd_coff_link_hash_newfunc
))
958 return (struct bfd_link_hash_table
*) NULL
;
961 ret
->thumb_glue_size
= 0;
962 ret
->arm_glue_size
= 0;
963 ret
->bfd_of_glue_owner
= NULL
;
965 return & ret
->root
.root
;
969 arm_emit_base_file_entry (info
, output_bfd
, input_section
, reloc_offset
)
970 struct bfd_link_info
*info
;
972 asection
*input_section
;
973 bfd_vma reloc_offset
;
975 bfd_vma addr
= reloc_offset
977 + input_section
->output_offset
978 + input_section
->output_section
->vma
;
980 if (coff_data (output_bfd
)->pe
)
981 addr
-= pe_data (output_bfd
)->pe_opthdr
.ImageBase
;
982 fwrite (& addr
, 1, sizeof (addr
), (FILE *) info
->base_file
);
987 /* The thumb form of a long branch is a bit finicky, because the offset
988 encoding is split over two fields, each in it's own instruction. They
989 can occur in any order. So given a thumb form of long branch, and an
990 offset, insert the offset into the thumb branch and return finished
993 It takes two thumb instructions to encode the target address. Each has
994 11 bits to invest. The upper 11 bits are stored in one (identifed by
995 H-0.. see below), the lower 11 bits are stored in the other (identified
998 Combine together and shifted left by 1 (it's a half word address) and
1002 H-0, upper address-0 = 000
1004 H-1, lower address-0 = 800
1006 They can be ordered either way, but the arm tools I've seen always put
1007 the lower one first. It probably doesn't matter. krk@cygnus.com
1009 XXX: Actually the order does matter. The second instruction (H-1)
1010 moves the computed address into the PC, so it must be the second one
1011 in the sequence. The problem, however is that whilst little endian code
1012 stores the instructions in HI then LOW order, big endian code does the
1013 reverse. nickc@cygnus.com. */
1015 #define LOW_HI_ORDER 0xF800F000
1016 #define HI_LOW_ORDER 0xF000F800
1019 insert_thumb_branch (br_insn
, rel_off
)
1023 unsigned int low_bits
;
1024 unsigned int high_bits
;
1026 BFD_ASSERT((rel_off
& 1) != 1);
1028 rel_off
>>= 1; /* half word aligned address */
1029 low_bits
= rel_off
& 0x000007FF; /* the bottom 11 bits */
1030 high_bits
= (rel_off
>> 11) & 0x000007FF; /* the top 11 bits */
1032 if ((br_insn
& LOW_HI_ORDER
) == LOW_HI_ORDER
)
1033 br_insn
= LOW_HI_ORDER
| (low_bits
<< 16) | high_bits
;
1034 else if ((br_insn
& HI_LOW_ORDER
) == HI_LOW_ORDER
)
1035 br_insn
= HI_LOW_ORDER
| (high_bits
<< 16) | low_bits
;
1037 /* FIXME: the BFD library should never abort except for internal errors
1038 - it should return an error status. */
1039 abort (); /* Error - not a valid branch instruction form. */
1045 static struct coff_link_hash_entry
*
1046 find_thumb_glue (info
, name
, input_bfd
)
1047 struct bfd_link_info
*info
;
1052 struct coff_link_hash_entry
*myh
;
1053 bfd_size_type amt
= strlen (name
) + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1;
1055 tmp_name
= (char *) bfd_malloc (amt
);
1057 BFD_ASSERT (tmp_name
);
1059 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
1061 myh
= coff_link_hash_lookup
1062 (coff_hash_table (info
), tmp_name
, false, false, true);
1065 /* xgettext:c-format */
1066 _bfd_error_handler (_("%s: unable to find THUMB glue '%s' for `%s'"),
1067 bfd_archive_filename (input_bfd
), tmp_name
, name
);
1073 #endif /* not ARM_WINCE */
1075 static struct coff_link_hash_entry
*
1076 find_arm_glue (info
, name
, input_bfd
)
1077 struct bfd_link_info
*info
;
1082 struct coff_link_hash_entry
* myh
;
1083 bfd_size_type amt
= strlen (name
) + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1;
1085 tmp_name
= (char *) bfd_malloc (amt
);
1087 BFD_ASSERT (tmp_name
);
1089 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
1091 myh
= coff_link_hash_lookup
1092 (coff_hash_table (info
), tmp_name
, false, false, true);
1095 /* xgettext:c-format */
1096 _bfd_error_handler (_("%s: unable to find ARM glue '%s' for `%s'"),
1097 bfd_archive_filename (input_bfd
), tmp_name
, name
);
1109 ldr r12, __func_addr
1112 .word func @ behave as if you saw a ARM_32 reloc
1115 #define ARM2THUMB_GLUE_SIZE 12
1116 static const insn32 a2t1_ldr_insn
= 0xe59fc000;
1117 static const insn32 a2t2_bx_r12_insn
= 0xe12fff1c;
1118 static const insn32 a2t3_func_addr_insn
= 0x00000001;
1121 Thumb->ARM: Thumb->(non-interworking aware) ARM
1125 __func_from_thumb: __func_from_thumb:
1127 nop ldr r6, __func_addr
1129 __func_change_to_arm: bx r6
1131 __func_back_to_thumb:
1138 #define THUMB2ARM_GLUE_SIZE (globals->support_old_code ? 20 : 8)
1139 static const insn16 t2a1_bx_pc_insn
= 0x4778;
1140 static const insn16 t2a2_noop_insn
= 0x46c0;
1141 static const insn32 t2a3_b_insn
= 0xea000000;
1143 static const insn16 t2a1_push_insn
= 0xb540;
1144 static const insn16 t2a2_ldr_insn
= 0x4e03;
1145 static const insn16 t2a3_mov_insn
= 0x46fe;
1146 static const insn16 t2a4_bx_insn
= 0x4730;
1147 static const insn32 t2a5_pop_insn
= 0xe8bd4040;
1148 static const insn32 t2a6_bx_insn
= 0xe12fff1e;
1151 We should really create new local (static) symbols in destination
1152 object for each stub we create. We should also create local
1153 (static) symbols within the stubs when switching between ARM and
1154 Thumb code. This will ensure that the debugger and disassembler
1155 can present a better view of stubs.
1157 We can treat stubs like literal sections, and for the THUMB9 ones
1158 (short addressing range) we should be able to insert the stubs
1159 between sections. i.e. the simplest approach (since relocations
1160 are done on a section basis) is to dump the stubs at the end of
1161 processing a section. That way we can always try and minimise the
1162 offset to and from a stub. However, this does not map well onto
1163 the way that the linker/BFD does its work: mapping all input
1164 sections to output sections via the linker script before doing
1167 Unfortunately it may be easier to just to disallow short range
1168 Thumb->ARM stubs (i.e. no conditional inter-working branches,
1169 only branch-and-link (BL) calls. This will simplify the processing
1170 since we can then put all of the stubs into their own section.
1173 On a different subject, rather than complaining when a
1174 branch cannot fit in the number of bits available for the
1175 instruction we should generate a trampoline stub (needed to
1176 address the complete 32bit address space). */
1178 /* The standard COFF backend linker does not cope with the special
1179 Thumb BRANCH23 relocation. The alternative would be to split the
1180 BRANCH23 into seperate HI23 and LO23 relocations. However, it is a
1181 bit simpler simply providing our own relocation driver. */
1183 /* The reloc processing routine for the ARM/Thumb COFF linker. NOTE:
1184 This code is a very slightly modified copy of
1185 _bfd_coff_generic_relocate_section. It would be a much more
1186 maintainable solution to have a MACRO that could be expanded within
1187 _bfd_coff_generic_relocate_section that would only be provided for
1188 ARM/Thumb builds. It is only the code marked THUMBEXTENSION that
1189 is different from the original. */
1192 coff_arm_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
1193 contents
, relocs
, syms
, sections
)
1195 struct bfd_link_info
*info
;
1197 asection
*input_section
;
1199 struct internal_reloc
*relocs
;
1200 struct internal_syment
*syms
;
1201 asection
**sections
;
1203 struct internal_reloc
* rel
;
1204 struct internal_reloc
* relend
;
1207 relend
= rel
+ input_section
->reloc_count
;
1209 for (; rel
< relend
; rel
++)
1213 struct coff_link_hash_entry
* h
;
1214 struct internal_syment
* sym
;
1217 reloc_howto_type
* howto
;
1218 bfd_reloc_status_type rstat
;
1221 symndx
= rel
->r_symndx
;
1230 h
= obj_coff_sym_hashes (input_bfd
)[symndx
];
1231 sym
= syms
+ symndx
;
1234 /* COFF treats common symbols in one of two ways. Either the
1235 size of the symbol is included in the section contents, or it
1236 is not. We assume that the size is not included, and force
1237 the rtype_to_howto function to adjust the addend as needed. */
1239 if (sym
!= NULL
&& sym
->n_scnum
!= 0)
1240 addend
= - sym
->n_value
;
1244 howto
= coff_rtype_to_howto (input_bfd
, input_section
, rel
, h
,
1249 /* The relocation_section function will skip pcrel_offset relocs
1250 when doing a relocateable link. However, we want to convert
1251 ARM26 to ARM26D relocs if possible. We return a fake howto in
1252 this case without pcrel_offset set, and adjust the addend to
1254 if (rel
->r_type
== ARM_26
1256 && info
->relocateable
1257 && (h
->root
.type
== bfd_link_hash_defined
1258 || h
->root
.type
== bfd_link_hash_defweak
)
1259 && (h
->root
.u
.def
.section
->output_section
1260 == input_section
->output_section
))
1262 static reloc_howto_type fake_arm26_reloc
=
1269 complain_overflow_signed
,
1270 aoutarm_fix_pcrel_26
,
1277 addend
-= rel
->r_vaddr
- input_section
->vma
;
1278 howto
= &fake_arm26_reloc
;
1282 /* MS ARM-CE makes the reloc relative to the opcode's pc, not
1283 the next opcode's pc, so is off by one. */
1284 if (howto
->pc_relative
&& !info
->relocateable
)
1288 /* If we are doing a relocateable link, then we can just ignore
1289 a PC relative reloc that is pcrel_offset. It will already
1290 have the correct value. If this is not a relocateable link,
1291 then we should ignore the symbol value. */
1292 if (howto
->pc_relative
&& howto
->pcrel_offset
)
1294 if (info
->relocateable
)
1296 /* FIXME - it is not clear which targets need this next test
1297 and which do not. It is known that it is needed for the
1298 VxWorks and EPOC-PE targets, but it is also known that it
1299 was supressed for other ARM targets. This ought to be
1300 sorted out one day. */
1301 #ifdef ARM_COFF_BUGFIX
1302 /* We must not ignore the symbol value. If the symbol is
1303 within the same section, the relocation should have already
1304 been fixed, but if it is not, we'll be handed a reloc into
1305 the beginning of the symbol's section, so we must not cancel
1306 out the symbol's value, otherwise we'll be adding it in
1308 if (sym
!= NULL
&& sym
->n_scnum
!= 0)
1309 addend
+= sym
->n_value
;
1321 sec
= bfd_abs_section_ptr
;
1326 sec
= sections
[symndx
];
1327 val
= (sec
->output_section
->vma
1328 + sec
->output_offset
1335 #if 1 /* THUMBEXTENSION */
1336 /* We don't output the stubs if we are generating a
1337 relocatable output file, since we may as well leave the
1338 stub generation to the final linker pass. If we fail to
1339 verify that the name is defined, we'll try to build stubs
1340 for an undefined name... */
1341 if (! info
->relocateable
1342 && ( h
->root
.type
== bfd_link_hash_defined
1343 || h
->root
.type
== bfd_link_hash_defweak
))
1345 asection
* h_sec
= h
->root
.u
.def
.section
;
1346 const char * name
= h
->root
.root
.string
;
1348 /* h locates the symbol referenced in the reloc. */
1349 h_val
= (h
->root
.u
.def
.value
1350 + h_sec
->output_section
->vma
1351 + h_sec
->output_offset
);
1353 if (howto
->type
== ARM_26
)
1355 if ( h
->class == C_THUMBSTATFUNC
1356 || h
->class == C_THUMBEXTFUNC
)
1358 /* Arm code calling a Thumb function. */
1359 unsigned long int tmp
;
1362 long int ret_offset
;
1363 struct coff_link_hash_entry
* myh
;
1364 struct coff_arm_link_hash_table
* globals
;
1366 myh
= find_arm_glue (info
, name
, input_bfd
);
1370 globals
= coff_arm_hash_table (info
);
1372 BFD_ASSERT (globals
!= NULL
);
1373 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1375 my_offset
= myh
->root
.u
.def
.value
;
1377 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
1378 ARM2THUMB_GLUE_SECTION_NAME
);
1379 BFD_ASSERT (s
!= NULL
);
1380 BFD_ASSERT (s
->contents
!= NULL
);
1381 BFD_ASSERT (s
->output_section
!= NULL
);
1383 if ((my_offset
& 0x01) == 0x01)
1385 if (h_sec
->owner
!= NULL
1386 && INTERWORK_SET (h_sec
->owner
)
1387 && ! INTERWORK_FLAG (h_sec
->owner
))
1390 /* xgettext:c-format */
1391 (_("%s(%s): warning: interworking not enabled."),
1392 bfd_archive_filename (h_sec
->owner
), name
);
1394 /* xgettext:c-format */
1395 (_(" first occurrence: %s: arm call to thumb"),
1396 bfd_archive_filename (input_bfd
));
1400 myh
->root
.u
.def
.value
= my_offset
;
1402 bfd_put_32 (output_bfd
, (bfd_vma
) a2t1_ldr_insn
,
1403 s
->contents
+ my_offset
);
1405 bfd_put_32 (output_bfd
, (bfd_vma
) a2t2_bx_r12_insn
,
1406 s
->contents
+ my_offset
+ 4);
1408 /* It's a thumb address. Add the low order bit. */
1409 bfd_put_32 (output_bfd
, h_val
| a2t3_func_addr_insn
,
1410 s
->contents
+ my_offset
+ 8);
1412 if (info
->base_file
)
1413 arm_emit_base_file_entry (info
, output_bfd
, s
,
1418 BFD_ASSERT (my_offset
<= globals
->arm_glue_size
);
1420 tmp
= bfd_get_32 (input_bfd
, contents
+ rel
->r_vaddr
1421 - input_section
->vma
);
1423 tmp
= tmp
& 0xFF000000;
1425 /* Somehow these are both 4 too far, so subtract 8. */
1429 + s
->output_section
->vma
1430 - (input_section
->output_offset
1431 + input_section
->output_section
->vma
1435 tmp
= tmp
| ((ret_offset
>> 2) & 0x00FFFFFF);
1437 bfd_put_32 (output_bfd
, (bfd_vma
) tmp
,
1438 contents
+ rel
->r_vaddr
- input_section
->vma
);
1444 /* Note: We used to check for ARM_THUMB9 and ARM_THUMB12. */
1445 else if (howto
->type
== ARM_THUMB23
)
1447 if ( h
->class == C_EXT
1448 || h
->class == C_STAT
1449 || h
->class == C_LABEL
)
1451 /* Thumb code calling an ARM function */
1454 unsigned long int tmp
;
1455 long int ret_offset
;
1456 struct coff_link_hash_entry
* myh
;
1457 struct coff_arm_link_hash_table
* globals
;
1459 myh
= find_thumb_glue (info
, name
, input_bfd
);
1463 globals
= coff_arm_hash_table (info
);
1465 BFD_ASSERT (globals
!= NULL
);
1466 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1468 my_offset
= myh
->root
.u
.def
.value
;
1470 s
= bfd_get_section_by_name (globals
->bfd_of_glue_owner
,
1471 THUMB2ARM_GLUE_SECTION_NAME
);
1473 BFD_ASSERT (s
!= NULL
);
1474 BFD_ASSERT (s
->contents
!= NULL
);
1475 BFD_ASSERT (s
->output_section
!= NULL
);
1477 if ((my_offset
& 0x01) == 0x01)
1479 if (h_sec
->owner
!= NULL
1480 && INTERWORK_SET (h_sec
->owner
)
1481 && ! INTERWORK_FLAG (h_sec
->owner
)
1482 && ! globals
->support_old_code
)
1485 /* xgettext:c-format */
1486 (_("%s(%s): warning: interworking not enabled."),
1487 bfd_archive_filename (h_sec
->owner
), name
);
1489 /* xgettext:c-format */
1490 (_(" first occurrence: %s: thumb call to arm"),
1491 bfd_archive_filename (input_bfd
));
1493 (_(" consider relinking with --support-old-code enabled"));
1497 myh
->root
.u
.def
.value
= my_offset
;
1499 if (globals
->support_old_code
)
1501 bfd_put_16 (output_bfd
, (bfd_vma
) t2a1_push_insn
,
1502 s
->contents
+ my_offset
);
1504 bfd_put_16 (output_bfd
, (bfd_vma
) t2a2_ldr_insn
,
1505 s
->contents
+ my_offset
+ 2);
1507 bfd_put_16 (output_bfd
, (bfd_vma
) t2a3_mov_insn
,
1508 s
->contents
+ my_offset
+ 4);
1510 bfd_put_16 (output_bfd
, (bfd_vma
) t2a4_bx_insn
,
1511 s
->contents
+ my_offset
+ 6);
1513 bfd_put_32 (output_bfd
, (bfd_vma
) t2a5_pop_insn
,
1514 s
->contents
+ my_offset
+ 8);
1516 bfd_put_32 (output_bfd
, (bfd_vma
) t2a6_bx_insn
,
1517 s
->contents
+ my_offset
+ 12);
1519 /* Store the address of the function in the last word of the stub. */
1520 bfd_put_32 (output_bfd
, h_val
,
1521 s
->contents
+ my_offset
+ 16);
1523 if (info
->base_file
)
1524 arm_emit_base_file_entry (info
, output_bfd
, s
,
1529 bfd_put_16 (output_bfd
, (bfd_vma
) t2a1_bx_pc_insn
,
1530 s
->contents
+ my_offset
);
1532 bfd_put_16 (output_bfd
, (bfd_vma
) t2a2_noop_insn
,
1533 s
->contents
+ my_offset
+ 2);
1536 ((bfd_signed_vma
) h_val
) /* Address of destination of the stub. */
1538 (s
->output_offset
/* Offset from the start of the current section to the start of the stubs. */
1539 + my_offset
/* Offset of the start of this stub from the start of the stubs. */
1540 + s
->output_section
->vma
) /* Address of the start of the current section. */
1541 + 4 /* The branch instruction is 4 bytes into the stub. */
1542 + 8); /* ARM branches work from the pc of the instruction + 8. */
1544 bfd_put_32 (output_bfd
,
1545 (bfd_vma
) t2a3_b_insn
| ((ret_offset
>> 2) & 0x00FFFFFF),
1546 s
->contents
+ my_offset
+ 4);
1551 BFD_ASSERT (my_offset
<= globals
->thumb_glue_size
);
1553 /* Now go back and fix up the original BL insn to point
1558 - (input_section
->output_offset
1562 tmp
= bfd_get_32 (input_bfd
, contents
+ rel
->r_vaddr
1563 - input_section
->vma
);
1565 bfd_put_32 (output_bfd
,
1566 (bfd_vma
) insert_thumb_branch (tmp
,
1568 contents
+ rel
->r_vaddr
- input_section
->vma
);
1576 /* If the relocation type and destination symbol does not
1577 fall into one of the above categories, then we can just
1578 perform a direct link. */
1581 rstat
= bfd_reloc_ok
;
1583 #endif /* THUMBEXTENSION */
1584 if ( h
->root
.type
== bfd_link_hash_defined
1585 || h
->root
.type
== bfd_link_hash_defweak
)
1589 sec
= h
->root
.u
.def
.section
;
1590 val
= (h
->root
.u
.def
.value
1591 + sec
->output_section
->vma
1592 + sec
->output_offset
);
1595 else if (! info
->relocateable
)
1597 if (! ((*info
->callbacks
->undefined_symbol
)
1598 (info
, h
->root
.root
.string
, input_bfd
, input_section
,
1599 rel
->r_vaddr
- input_section
->vma
, true)))
1604 if (info
->base_file
)
1606 /* Emit a reloc if the backend thinks it needs it. */
1607 if (sym
&& pe_data(output_bfd
)->in_reloc_p(output_bfd
, howto
))
1608 arm_emit_base_file_entry (info
, output_bfd
, input_section
,
1612 #if 1 /* THUMBEXTENSION */
1614 rstat
= bfd_reloc_ok
;
1616 /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
1617 else if (! info
->relocateable
1618 && howto
->type
== ARM_THUMB23
)
1620 /* This is pretty much a copy of what the default
1621 _bfd_final_link_relocate and _bfd_relocate_contents
1622 routines do to perform a relocation, with special
1623 processing for the split addressing of the Thumb BL
1624 instruction. Again, it would probably be simpler adding a
1625 ThumbBRANCH23 specific macro expansion into the default
1628 bfd_vma address
= rel
->r_vaddr
- input_section
->vma
;
1630 if (address
> input_section
->_raw_size
)
1631 rstat
= bfd_reloc_outofrange
;
1634 bfd_vma relocation
= val
+ addend
;
1635 int size
= bfd_get_reloc_size (howto
);
1636 boolean overflow
= false;
1637 bfd_byte
* location
= contents
+ address
;
1638 bfd_vma x
= bfd_get_32 (input_bfd
, location
);
1639 bfd_vma src_mask
= 0x007FFFFE;
1640 bfd_signed_vma reloc_signed_max
= (1 << (howto
->bitsize
- 1)) - 1;
1641 bfd_signed_vma reloc_signed_min
= ~reloc_signed_max
;
1643 bfd_signed_vma signed_check
;
1645 bfd_signed_vma signed_add
;
1647 BFD_ASSERT (size
== 4);
1649 /* howto->pc_relative should be TRUE for type 14 BRANCH23. */
1650 relocation
-= (input_section
->output_section
->vma
1651 + input_section
->output_offset
);
1653 /* howto->pcrel_offset should be TRUE for type 14 BRANCH23. */
1654 relocation
-= address
;
1656 /* No need to negate the relocation with BRANCH23. */
1657 /* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */
1658 /* howto->rightshift == 1 */
1660 /* Drop unwanted bits from the value we are relocating to. */
1661 check
= relocation
>> howto
->rightshift
;
1663 /* If this is a signed value, the rightshift just dropped
1664 leading 1 bits (assuming twos complement). */
1665 if ((bfd_signed_vma
) relocation
>= 0)
1666 signed_check
= check
;
1668 signed_check
= (check
1670 & ~((bfd_vma
) - 1 >> howto
->rightshift
)));
1672 /* Get the value from the object file. */
1673 if (bfd_big_endian (input_bfd
))
1674 add
= (((x
) & 0x07ff0000) >> 4) | (((x
) & 0x7ff) << 1);
1676 add
= ((((x
) & 0x7ff) << 12) | (((x
) & 0x07ff0000) >> 15));
1678 /* Get the value from the object file with an appropriate sign.
1679 The expression involving howto->src_mask isolates the upper
1680 bit of src_mask. If that bit is set in the value we are
1681 adding, it is negative, and we subtract out that number times
1682 two. If src_mask includes the highest possible bit, then we
1683 can not get the upper bit, but that does not matter since
1684 signed_add needs no adjustment to become negative in that
1688 if ((add
& (((~ src_mask
) >> 1) & src_mask
)) != 0)
1689 signed_add
-= (((~ src_mask
) >> 1) & src_mask
) << 1;
1691 /* howto->bitpos == 0 */
1692 /* Add the value from the object file, shifted so that it is a
1694 signed_check
+= signed_add
;
1695 relocation
+= signed_add
;
1697 BFD_ASSERT (howto
->complain_on_overflow
== complain_overflow_signed
);
1699 /* Assumes two's complement. */
1700 if ( signed_check
> reloc_signed_max
1701 || signed_check
< reloc_signed_min
)
1704 /* For the BLX(1) instruction remove bit 0 of the adjusted offset.
1705 Bit 0 can only be set if the upper insn is at a half-word boundary,
1706 since the destination address, an ARM instruction, must always be
1707 on a word boundary. The semantics of the BLX (1) instruction,
1708 however, are that bit 0 in the offset must always be 0, and the
1709 corresponding bit 1 in the target address will be set from bit
1710 1 of the source address. */
1711 if ((x
& 0x18000000) == 0x08000000)
1714 /* Put the relocation into the correct bits. */
1715 if (bfd_big_endian (input_bfd
))
1716 relocation
= (((relocation
& 0xffe) >> 1) | ((relocation
<< 4) & 0x07ff0000));
1718 relocation
= (((relocation
& 0xffe) << 15) | ((relocation
>> 12) & 0x7ff));
1720 /* Add the relocation to the correct bits of X. */
1721 x
= ((x
& ~howto
->dst_mask
) | relocation
);
1723 /* Put the relocated value back in the object file. */
1724 bfd_put_32 (input_bfd
, x
, location
);
1726 rstat
= overflow
? bfd_reloc_overflow
: bfd_reloc_ok
;
1731 #endif /* THUMBEXTENSION */
1732 rstat
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1734 rel
->r_vaddr
- input_section
->vma
,
1736 #if 1 /* THUMBEXTENSION */
1738 Is this the best way to fix up thumb addresses? krk@cygnus.com
1739 Probably not, but it works, and if it works it don't need fixing! nickc@cygnus.com */
1740 /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
1741 if (! info
->relocateable
1742 && (rel
->r_type
== ARM_32
|| rel
->r_type
== ARM_RVA32
))
1744 /* Determine if we need to set the bottom bit of a relocated address
1745 because the address is the address of a Thumb code symbol. */
1747 int patchit
= false;
1750 && ( h
->class == C_THUMBSTATFUNC
1751 || h
->class == C_THUMBEXTFUNC
))
1755 else if (sym
!= NULL
1756 && sym
->n_scnum
> N_UNDEF
)
1758 /* No hash entry - use the symbol instead. */
1760 if ( sym
->n_sclass
== C_THUMBSTATFUNC
1761 || sym
->n_sclass
== C_THUMBEXTFUNC
)
1767 bfd_byte
* location
= contents
+ rel
->r_vaddr
- input_section
->vma
;
1768 bfd_vma x
= bfd_get_32 (input_bfd
, location
);
1770 bfd_put_32 (input_bfd
, x
| 1, location
);
1773 #endif /* THUMBEXTENSION */
1781 case bfd_reloc_outofrange
:
1782 (*_bfd_error_handler
)
1783 (_("%s: bad reloc address 0x%lx in section `%s'"),
1784 bfd_archive_filename (input_bfd
),
1785 (unsigned long) rel
->r_vaddr
,
1786 bfd_get_section_name (input_bfd
, input_section
));
1788 case bfd_reloc_overflow
:
1791 char buf
[SYMNMLEN
+ 1];
1796 name
= h
->root
.root
.string
;
1799 name
= _bfd_coff_internal_syment_name (input_bfd
, sym
, buf
);
1804 if (! ((*info
->callbacks
->reloc_overflow
)
1805 (info
, name
, howto
->name
, (bfd_vma
) 0, input_bfd
,
1806 input_section
, rel
->r_vaddr
- input_section
->vma
)))
1815 #ifndef COFF_IMAGE_WITH_PE
1818 bfd_arm_allocate_interworking_sections (info
)
1819 struct bfd_link_info
* info
;
1823 struct coff_arm_link_hash_table
* globals
;
1825 static char test_char
= '1';
1828 globals
= coff_arm_hash_table (info
);
1830 BFD_ASSERT (globals
!= NULL
);
1832 if (globals
->arm_glue_size
!= 0)
1834 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1836 s
= bfd_get_section_by_name
1837 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
1839 BFD_ASSERT (s
!= NULL
);
1841 foo
= (bfd_byte
*) bfd_alloc (globals
->bfd_of_glue_owner
,
1842 globals
->arm_glue_size
);
1844 memset (foo
, test_char
, (size_t) globals
->arm_glue_size
);
1847 s
->_raw_size
= s
->_cooked_size
= globals
->arm_glue_size
;
1851 if (globals
->thumb_glue_size
!= 0)
1853 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1855 s
= bfd_get_section_by_name
1856 (globals
->bfd_of_glue_owner
, THUMB2ARM_GLUE_SECTION_NAME
);
1858 BFD_ASSERT (s
!= NULL
);
1860 foo
= (bfd_byte
*) bfd_alloc (globals
->bfd_of_glue_owner
,
1861 globals
->thumb_glue_size
);
1863 memset (foo
, test_char
, (size_t) globals
->thumb_glue_size
);
1866 s
->_raw_size
= s
->_cooked_size
= globals
->thumb_glue_size
;
1874 record_arm_to_thumb_glue (info
, h
)
1875 struct bfd_link_info
* info
;
1876 struct coff_link_hash_entry
* h
;
1878 const char * name
= h
->root
.root
.string
;
1879 register asection
* s
;
1881 struct coff_link_hash_entry
* myh
;
1882 struct coff_arm_link_hash_table
* globals
;
1886 globals
= coff_arm_hash_table (info
);
1888 BFD_ASSERT (globals
!= NULL
);
1889 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1891 s
= bfd_get_section_by_name
1892 (globals
->bfd_of_glue_owner
, ARM2THUMB_GLUE_SECTION_NAME
);
1894 BFD_ASSERT (s
!= NULL
);
1896 amt
= strlen (name
) + strlen (ARM2THUMB_GLUE_ENTRY_NAME
) + 1;
1897 tmp_name
= (char *) bfd_malloc (amt
);
1899 BFD_ASSERT (tmp_name
);
1901 sprintf (tmp_name
, ARM2THUMB_GLUE_ENTRY_NAME
, name
);
1903 myh
= coff_link_hash_lookup
1904 (coff_hash_table (info
), tmp_name
, false, false, true);
1909 return; /* we've already seen this guy */
1912 /* The only trick here is using globals->arm_glue_size as the value. Even
1913 though the section isn't allocated yet, this is where we will be putting
1916 val
= globals
->arm_glue_size
+ 1;
1917 bfd_coff_link_add_one_symbol (info
, globals
->bfd_of_glue_owner
, tmp_name
,
1918 BSF_GLOBAL
, s
, val
, NULL
, true, false,
1919 (struct bfd_link_hash_entry
**) & myh
);
1923 globals
->arm_glue_size
+= ARM2THUMB_GLUE_SIZE
;
1930 record_thumb_to_arm_glue (info
, h
)
1931 struct bfd_link_info
* info
;
1932 struct coff_link_hash_entry
* h
;
1934 const char * name
= h
->root
.root
.string
;
1935 register asection
* s
;
1937 struct coff_link_hash_entry
* myh
;
1938 struct coff_arm_link_hash_table
* globals
;
1942 globals
= coff_arm_hash_table (info
);
1944 BFD_ASSERT (globals
!= NULL
);
1945 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
1947 s
= bfd_get_section_by_name
1948 (globals
->bfd_of_glue_owner
, THUMB2ARM_GLUE_SECTION_NAME
);
1950 BFD_ASSERT (s
!= NULL
);
1952 amt
= strlen (name
) + strlen (THUMB2ARM_GLUE_ENTRY_NAME
) + 1;
1953 tmp_name
= (char *) bfd_malloc (amt
);
1955 BFD_ASSERT (tmp_name
);
1957 sprintf (tmp_name
, THUMB2ARM_GLUE_ENTRY_NAME
, name
);
1959 myh
= coff_link_hash_lookup
1960 (coff_hash_table (info
), tmp_name
, false, false, true);
1965 return; /* we've already seen this guy */
1968 val
= globals
->thumb_glue_size
+ 1;
1969 bfd_coff_link_add_one_symbol (info
, globals
->bfd_of_glue_owner
, tmp_name
,
1970 BSF_GLOBAL
, s
, val
, NULL
, true, false,
1971 (struct bfd_link_hash_entry
**) &myh
);
1973 /* If we mark it 'thumb', the disassembler will do a better job. */
1974 myh
->class = C_THUMBEXTFUNC
;
1978 /* Allocate another symbol to mark where we switch to arm mode. */
1980 #define CHANGE_TO_ARM "__%s_change_to_arm"
1981 #define BACK_FROM_ARM "__%s_back_from_arm"
1983 amt
= strlen (name
) + strlen (CHANGE_TO_ARM
) + 1;
1984 tmp_name
= (char *) bfd_malloc (amt
);
1986 BFD_ASSERT (tmp_name
);
1988 sprintf (tmp_name
, globals
->support_old_code
? BACK_FROM_ARM
: CHANGE_TO_ARM
, name
);
1991 val
= globals
->thumb_glue_size
+ (globals
->support_old_code
? 8 : 4);
1992 bfd_coff_link_add_one_symbol (info
, globals
->bfd_of_glue_owner
, tmp_name
,
1993 BSF_LOCAL
, s
, val
, NULL
, true, false,
1994 (struct bfd_link_hash_entry
**) & myh
);
1998 globals
->thumb_glue_size
+= THUMB2ARM_GLUE_SIZE
;
2002 #endif /* not ARM_WINCE */
2004 /* Select a BFD to be used to hold the sections used by the glue code.
2005 This function is called from the linker scripts in ld/emultempl/
2009 bfd_arm_get_bfd_for_interworking (abfd
, info
)
2011 struct bfd_link_info
* info
;
2013 struct coff_arm_link_hash_table
* globals
;
2017 /* If we are only performing a partial link do not bother
2018 getting a bfd to hold the glue. */
2019 if (info
->relocateable
)
2022 globals
= coff_arm_hash_table (info
);
2024 BFD_ASSERT (globals
!= NULL
);
2026 if (globals
->bfd_of_glue_owner
!= NULL
)
2029 sec
= bfd_get_section_by_name (abfd
, ARM2THUMB_GLUE_SECTION_NAME
);
2033 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_CODE
| SEC_READONLY
;
2035 sec
= bfd_make_section (abfd
, ARM2THUMB_GLUE_SECTION_NAME
);
2038 || ! bfd_set_section_flags (abfd
, sec
, flags
)
2039 || ! bfd_set_section_alignment (abfd
, sec
, 2))
2043 sec
= bfd_get_section_by_name (abfd
, THUMB2ARM_GLUE_SECTION_NAME
);
2047 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_CODE
| SEC_READONLY
;
2049 sec
= bfd_make_section (abfd
, THUMB2ARM_GLUE_SECTION_NAME
);
2052 || ! bfd_set_section_flags (abfd
, sec
, flags
)
2053 || ! bfd_set_section_alignment (abfd
, sec
, 2))
2057 /* Save the bfd for later use. */
2058 globals
->bfd_of_glue_owner
= abfd
;
2064 bfd_arm_process_before_allocation (abfd
, info
, support_old_code
)
2066 struct bfd_link_info
* info
;
2067 int support_old_code
;
2070 struct coff_arm_link_hash_table
* globals
;
2072 /* If we are only performing a partial link do not bother
2073 to construct any glue. */
2074 if (info
->relocateable
)
2077 /* Here we have a bfd that is to be included on the link. We have a hook
2078 to do reloc rummaging, before section sizes are nailed down. */
2080 _bfd_coff_get_external_symbols (abfd
);
2082 globals
= coff_arm_hash_table (info
);
2084 BFD_ASSERT (globals
!= NULL
);
2085 BFD_ASSERT (globals
->bfd_of_glue_owner
!= NULL
);
2087 globals
->support_old_code
= support_old_code
;
2089 /* Rummage around all the relocs and map the glue vectors. */
2090 sec
= abfd
->sections
;
2095 for (; sec
!= NULL
; sec
= sec
->next
)
2097 struct internal_reloc
* i
;
2098 struct internal_reloc
* rel
;
2100 if (sec
->reloc_count
== 0)
2103 /* Load the relocs. */
2104 /* FIXME: there may be a storage leak here. */
2106 i
= _bfd_coff_read_internal_relocs (abfd
, sec
, 1, 0, 0, 0);
2108 BFD_ASSERT (i
!= 0);
2110 for (rel
= i
; rel
< i
+ sec
->reloc_count
; ++rel
)
2112 unsigned short r_type
= rel
->r_type
;
2114 struct coff_link_hash_entry
* h
;
2116 symndx
= rel
->r_symndx
;
2118 /* If the relocation is not against a symbol it cannot concern us. */
2122 /* If the index is outside of the range of our table, something has gone wrong. */
2123 if (symndx
>= obj_conv_table_size (abfd
))
2125 _bfd_error_handler (_("%s: illegal symbol index in reloc: %d"),
2126 bfd_archive_filename (abfd
), symndx
);
2130 h
= obj_coff_sym_hashes (abfd
)[symndx
];
2132 /* If the relocation is against a static symbol it must be within
2133 the current section and so cannot be a cross ARM/Thumb relocation. */
2140 /* This one is a call from arm code. We need to look up
2141 the target of the call. If it is a thumb target, we
2144 if (h
->class == C_THUMBEXTFUNC
)
2145 record_arm_to_thumb_glue (info
, h
);
2150 /* This one is a call from thumb code. We used to look
2151 for ARM_THUMB9 and ARM_THUMB12 as well. We need to look
2152 up the target of the call. If it is an arm target, we
2153 insert glue. If the symbol does not exist it will be
2154 given a class of C_EXT and so we will generate a stub
2155 for it. This is not really a problem, since the link
2156 is doomed anyway. */
2163 record_thumb_to_arm_glue (info
, h
);
2180 #endif /* ! defined (COFF_IMAGE_WITH_PE) */
2182 #define coff_bfd_reloc_type_lookup coff_arm_reloc_type_lookup
2183 #define coff_relocate_section coff_arm_relocate_section
2184 #define coff_bfd_is_local_label_name coff_arm_is_local_label_name
2185 #define coff_adjust_symndx coff_arm_adjust_symndx
2186 #define coff_link_output_has_begun coff_arm_link_output_has_begun
2187 #define coff_final_link_postscript coff_arm_final_link_postscript
2188 #define coff_bfd_merge_private_bfd_data coff_arm_merge_private_bfd_data
2189 #define coff_bfd_print_private_bfd_data coff_arm_print_private_bfd_data
2190 #define coff_bfd_set_private_flags _bfd_coff_arm_set_private_flags
2191 #define coff_bfd_copy_private_bfd_data coff_arm_copy_private_bfd_data
2192 #define coff_bfd_link_hash_table_create coff_arm_link_hash_table_create
2194 /* When doing a relocateable link, we want to convert ARM26 relocs
2195 into ARM26D relocs. */
2198 coff_arm_adjust_symndx (obfd
, info
, ibfd
, sec
, irel
, adjustedp
)
2199 bfd
*obfd ATTRIBUTE_UNUSED
;
2200 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
2203 struct internal_reloc
*irel
;
2206 if (irel
->r_type
== 3)
2208 struct coff_link_hash_entry
*h
;
2210 h
= obj_coff_sym_hashes (ibfd
)[irel
->r_symndx
];
2212 && (h
->root
.type
== bfd_link_hash_defined
2213 || h
->root
.type
== bfd_link_hash_defweak
)
2214 && h
->root
.u
.def
.section
->output_section
== sec
->output_section
)
2221 /* Called when merging the private data areas of two BFDs.
2222 This is important as it allows us to detect if we are
2223 attempting to merge binaries compiled for different ARM
2224 targets, eg different CPUs or differents APCS's. */
2227 coff_arm_merge_private_bfd_data (ibfd
, obfd
)
2231 BFD_ASSERT (ibfd
!= NULL
&& obfd
!= NULL
);
2236 /* If the two formats are different we cannot merge anything.
2237 This is not an error, since it is permissable to change the
2238 input and output formats. */
2239 if ( ibfd
->xvec
->flavour
!= bfd_target_coff_flavour
2240 || obfd
->xvec
->flavour
!= bfd_target_coff_flavour
)
2243 /* Verify that the APCS is the same for the two BFDs */
2244 if (APCS_SET (ibfd
))
2246 if (APCS_SET (obfd
))
2248 /* If the src and dest have different APCS flag bits set, fail. */
2249 if (APCS_26_FLAG (obfd
) != APCS_26_FLAG (ibfd
))
2252 /* xgettext: c-format */
2253 (_("ERROR: %s is compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
2254 bfd_archive_filename (ibfd
), APCS_26_FLAG (ibfd
) ? 26 : 32,
2255 bfd_get_filename (obfd
), APCS_26_FLAG (obfd
) ? 26 : 32
2258 bfd_set_error (bfd_error_wrong_format
);
2262 if (APCS_FLOAT_FLAG (obfd
) != APCS_FLOAT_FLAG (ibfd
))
2266 if (APCS_FLOAT_FLAG (ibfd
))
2267 /* xgettext: c-format */
2268 msg
= _("ERROR: %s passes floats in float registers, whereas %s passes them in integer registers");
2270 /* xgettext: c-format */
2271 msg
= _("ERROR: %s passes floats in integer registers, whereas %s passes them in float registers");
2273 _bfd_error_handler (msg
, bfd_archive_filename (ibfd
),
2274 bfd_get_filename (obfd
));
2276 bfd_set_error (bfd_error_wrong_format
);
2280 if (PIC_FLAG (obfd
) != PIC_FLAG (ibfd
))
2284 if (PIC_FLAG (ibfd
))
2285 /* xgettext: c-format */
2286 msg
= _("ERROR: %s is compiled as position independent code, whereas target %s is absolute position");
2288 /* xgettext: c-format */
2289 msg
= _("ERROR: %s is compiled as absolute position code, whereas target %s is position independent");
2290 _bfd_error_handler (msg
, bfd_archive_filename (ibfd
),
2291 bfd_get_filename (obfd
));
2293 bfd_set_error (bfd_error_wrong_format
);
2299 SET_APCS_FLAGS (obfd
, APCS_26_FLAG (ibfd
) | APCS_FLOAT_FLAG (ibfd
) | PIC_FLAG (ibfd
));
2301 /* Set up the arch and fields as well as these are probably wrong. */
2302 bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
), bfd_get_mach (ibfd
));
2306 /* Check the interworking support. */
2307 if (INTERWORK_SET (ibfd
))
2309 if (INTERWORK_SET (obfd
))
2311 /* If the src and dest differ in their interworking issue a warning. */
2312 if (INTERWORK_FLAG (obfd
) != INTERWORK_FLAG (ibfd
))
2316 if (INTERWORK_FLAG (ibfd
))
2317 /* xgettext: c-format */
2318 msg
= _("Warning: %s supports interworking, whereas %s does not");
2320 /* xgettext: c-format */
2321 msg
= _("Warning: %s does not support interworking, whereas %s does");
2323 _bfd_error_handler (msg
, bfd_archive_filename (ibfd
),
2324 bfd_get_filename (obfd
));
2329 SET_INTERWORK_FLAG (obfd
, INTERWORK_FLAG (ibfd
));
2336 /* Display the flags field. */
2339 coff_arm_print_private_bfd_data (abfd
, ptr
)
2343 FILE * file
= (FILE *) ptr
;
2345 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
2347 /* xgettext:c-format */
2348 fprintf (file
, _("private flags = %x:"), coff_data (abfd
)->flags
);
2350 if (APCS_SET (abfd
))
2352 /* xgettext: APCS is ARM Prodecure Call Standard, it should not be translated. */
2353 fprintf (file
, " [APCS-%d]", APCS_26_FLAG (abfd
) ? 26 : 32);
2355 if (APCS_FLOAT_FLAG (abfd
))
2356 fprintf (file
, _(" [floats passed in float registers]"));
2358 fprintf (file
, _(" [floats passed in integer registers]"));
2360 if (PIC_FLAG (abfd
))
2361 fprintf (file
, _(" [position independent]"));
2363 fprintf (file
, _(" [absolute position]"));
2366 if (! INTERWORK_SET (abfd
))
2367 fprintf (file
, _(" [interworking flag not initialised]"));
2368 else if (INTERWORK_FLAG (abfd
))
2369 fprintf (file
, _(" [interworking supported]"));
2371 fprintf (file
, _(" [interworking not supported]"));
2378 /* Copies the given flags into the coff_tdata.flags field.
2379 Typically these flags come from the f_flags[] field of
2380 the COFF filehdr structure, which contains important,
2381 target specific information.
2382 Note: Although this function is static, it is explicitly
2383 called from both coffcode.h and peicode.h. */
2386 _bfd_coff_arm_set_private_flags (abfd
, flags
)
2392 BFD_ASSERT (abfd
!= NULL
);
2394 flag
= (flags
& F_APCS26
) ? F_APCS_26
: 0;
2396 /* Make sure that the APCS field has not been initialised to the opposite
2399 && ( (APCS_26_FLAG (abfd
) != flag
)
2400 || (APCS_FLOAT_FLAG (abfd
) != (flags
& F_APCS_FLOAT
))
2401 || (PIC_FLAG (abfd
) != (flags
& F_PIC
))
2405 flag
|= (flags
& (F_APCS_FLOAT
| F_PIC
));
2407 SET_APCS_FLAGS (abfd
, flag
);
2409 flag
= (flags
& F_INTERWORK
);
2411 /* If the BFD has already had its interworking flag set, but it
2412 is different from the value that we have been asked to set,
2413 then assume that that merged code will not support interworking
2414 and set the flag accordingly. */
2415 if (INTERWORK_SET (abfd
) && (INTERWORK_FLAG (abfd
) != flag
))
2418 /* xgettext: c-format */
2419 _bfd_error_handler (_("Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"),
2420 bfd_archive_filename (abfd
));
2422 /* xgettext: c-format */
2423 _bfd_error_handler (_("Warning: Clearing the interworking flag of %s due to outside request"),
2424 bfd_archive_filename (abfd
));
2428 SET_INTERWORK_FLAG (abfd
, flag
);
2433 /* Copy the important parts of the target specific data
2434 from one instance of a BFD to another. */
2437 coff_arm_copy_private_bfd_data (src
, dest
)
2441 BFD_ASSERT (src
!= NULL
&& dest
!= NULL
);
2446 /* If the destination is not in the same format as the source, do not do
2448 if (src
->xvec
!= dest
->xvec
)
2451 /* copy the flags field */
2454 if (APCS_SET (dest
))
2456 /* If the src and dest have different APCS flag bits set, fail. */
2457 if (APCS_26_FLAG (dest
) != APCS_26_FLAG (src
))
2460 if (APCS_FLOAT_FLAG (dest
) != APCS_FLOAT_FLAG (src
))
2463 if (PIC_FLAG (dest
) != PIC_FLAG (src
))
2467 SET_APCS_FLAGS (dest
, APCS_26_FLAG (src
) | APCS_FLOAT_FLAG (src
)
2471 if (INTERWORK_SET (src
))
2473 if (INTERWORK_SET (dest
))
2475 /* If the src and dest have different interworking flags then turn
2476 off the interworking bit. */
2477 if (INTERWORK_FLAG (dest
) != INTERWORK_FLAG (src
))
2479 if (INTERWORK_FLAG (dest
))
2481 /* xgettext:c-format */
2482 _bfd_error_handler (("\
2483 Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"),
2484 bfd_get_filename (dest
),
2485 bfd_archive_filename (src
));
2488 SET_INTERWORK_FLAG (dest
, 0);
2493 SET_INTERWORK_FLAG (dest
, INTERWORK_FLAG (src
));
2500 /* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX
2501 *must* match the definitions in gcc/config/arm/{coff|semi|aout}.h. */
2502 #define LOCAL_LABEL_PREFIX ""
2503 #ifndef USER_LABEL_PREFIX
2504 #define USER_LABEL_PREFIX "_"
2507 /* Like _bfd_coff_is_local_label_name, but
2508 a) test against USER_LABEL_PREFIX, to avoid stripping labels known to be
2510 b) Allow other prefixes than ".", e.g. an empty prefix would cause all
2511 labels of the form Lxxx to be stripped. */
2513 coff_arm_is_local_label_name (abfd
, name
)
2514 bfd
* abfd ATTRIBUTE_UNUSED
;
2517 #ifdef USER_LABEL_PREFIX
2518 if (USER_LABEL_PREFIX
[0] != 0)
2520 if (strncmp (name
, USER_LABEL_PREFIX
, strlen (USER_LABEL_PREFIX
)) == 0)
2525 #ifdef LOCAL_LABEL_PREFIX
2526 /* If there is a prefix for local labels then look for this.
2527 If the prefix exists, but it is empty, then ignore the test. */
2529 if (LOCAL_LABEL_PREFIX
[0] != 0)
2531 size_t len
= strlen (LOCAL_LABEL_PREFIX
);
2533 if (strncmp (name
, LOCAL_LABEL_PREFIX
, len
) != 0)
2536 /* Perform the checks below for the rest of the name. */
2541 return name
[0] == 'L';
2544 /* This piece of machinery exists only to guarantee that the bfd that holds
2545 the glue section is written last.
2547 This does depend on bfd_make_section attaching a new section to the
2548 end of the section list for the bfd.
2553 coff_arm_link_output_has_begun (sub
, info
)
2555 struct coff_final_link_info
* info
;
2557 return (sub
->output_has_begun
2558 || sub
== coff_arm_hash_table (info
->info
)->bfd_of_glue_owner
);
2562 coff_arm_final_link_postscript (abfd
, pfinfo
)
2563 bfd
* abfd ATTRIBUTE_UNUSED
;
2564 struct coff_final_link_info
* pfinfo
;
2566 struct coff_arm_link_hash_table
* globals
;
2568 globals
= coff_arm_hash_table (pfinfo
->info
);
2570 BFD_ASSERT (globals
!= NULL
);
2572 if (globals
->bfd_of_glue_owner
!= NULL
)
2574 if (! _bfd_coff_link_input_bfd (pfinfo
, globals
->bfd_of_glue_owner
))
2577 globals
->bfd_of_glue_owner
->output_has_begun
= true;
2583 #include "coffcode.h"
2585 #ifndef TARGET_LITTLE_SYM
2586 #define TARGET_LITTLE_SYM armcoff_little_vec
2588 #ifndef TARGET_LITTLE_NAME
2589 #define TARGET_LITTLE_NAME "coff-arm-little"
2591 #ifndef TARGET_BIG_SYM
2592 #define TARGET_BIG_SYM armcoff_big_vec
2594 #ifndef TARGET_BIG_NAME
2595 #define TARGET_BIG_NAME "coff-arm-big"
2598 #ifndef TARGET_UNDERSCORE
2599 #define TARGET_UNDERSCORE 0
2602 #ifndef EXTRA_S_FLAGS
2604 #define EXTRA_S_FLAGS (SEC_LINK_ONCE | SEC_LINK_DUPLICATES)
2606 #define EXTRA_S_FLAGS 0
2610 /* Forward declaration for use initialising alternative_target field. */
2611 extern const bfd_target TARGET_BIG_SYM
;
2613 /* Target vectors. */
2614 CREATE_LITTLE_COFF_TARGET_VEC (TARGET_LITTLE_SYM
, TARGET_LITTLE_NAME
, D_PAGED
, EXTRA_S_FLAGS
, TARGET_UNDERSCORE
, & TARGET_BIG_SYM
)
2615 CREATE_BIG_COFF_TARGET_VEC (TARGET_BIG_SYM
, TARGET_BIG_NAME
, D_PAGED
, EXTRA_S_FLAGS
, TARGET_UNDERSCORE
, & TARGET_LITTLE_SYM
)