1 /* 32-bit ELF support for Nios II.
2 Copyright (C) 2012-2016 Free Software Foundation, Inc.
3 Contributed by Nigel Gray (ngray@altera.com).
4 Contributed by Mentor Graphics, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
23 /* This file handles Altera Nios II ELF targets. */
31 #include "elf/nios2.h"
32 #include "opcode/nios2.h"
33 #include "elf32-nios2.h"
35 /* Use RELA relocations. */
44 /* Forward declarations. */
45 static bfd_reloc_status_type nios2_elf32_ignore_reloc
46 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
47 static bfd_reloc_status_type nios2_elf32_hi16_relocate
48 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
49 static bfd_reloc_status_type nios2_elf32_lo16_relocate
50 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
51 static bfd_reloc_status_type nios2_elf32_hiadj16_relocate
52 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
53 static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate
54 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
55 static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate
56 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
57 static bfd_reloc_status_type nios2_elf32_pcrel16_relocate
58 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
59 static bfd_reloc_status_type nios2_elf32_call26_relocate
60 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
61 static bfd_reloc_status_type nios2_elf32_gprel_relocate
62 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
63 static bfd_reloc_status_type nios2_elf32_ujmp_relocate
64 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
65 static bfd_reloc_status_type nios2_elf32_cjmp_relocate
66 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
67 static bfd_reloc_status_type nios2_elf32_callr_relocate
68 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
71 extern const bfd_target nios2_elf32_le_vec
;
72 extern const bfd_target nios2_elf32_be_vec
;
74 /* Offset of tp and dtp pointers from start of TLS block. */
75 #define TP_OFFSET 0x7000
76 #define DTP_OFFSET 0x8000
78 /* The relocation tables used for SHT_REL sections. There are separate
79 tables for R1 and R2 encodings. */
80 static reloc_howto_type elf_nios2_r1_howto_table_rel
[] = {
82 HOWTO (R_NIOS2_NONE
, /* type */
84 3, /* size (0 = byte, 1 = short, 2 = long) */
86 FALSE
, /* pc_relative */
88 complain_overflow_dont
, /* complain_on_overflow */
89 bfd_elf_generic_reloc
, /* special_function */
90 "R_NIOS2_NONE", /* name */
91 FALSE
, /* partial_inplace */
94 FALSE
), /* pcrel_offset */
96 /* 16-bit signed immediate relocation. */
97 HOWTO (R_NIOS2_S16
, /* type */
99 2, /* size (0 = byte, 1 = short, 2 = long) */
101 FALSE
, /* pc_relative */
103 complain_overflow_signed
, /* complain on overflow */
104 bfd_elf_generic_reloc
, /* special function */
105 "R_NIOS2_S16", /* name */
106 FALSE
, /* partial_inplace */
107 0x003fffc0, /* src_mask */
108 0x003fffc0, /* dest_mask */
109 FALSE
), /* pcrel_offset */
111 /* 16-bit unsigned immediate relocation. */
112 HOWTO (R_NIOS2_U16
, /* type */
114 2, /* size (0 = byte, 1 = short, 2 = long) */
116 FALSE
, /* pc_relative */
118 complain_overflow_unsigned
, /* complain on overflow */
119 bfd_elf_generic_reloc
, /* special function */
120 "R_NIOS2_U16", /* name */
121 FALSE
, /* partial_inplace */
122 0x003fffc0, /* src_mask */
123 0x003fffc0, /* dest_mask */
124 FALSE
), /* pcrel_offset */
126 HOWTO (R_NIOS2_PCREL16
, /* type */
128 2, /* size (0 = byte, 1 = short, 2 = long) */
130 TRUE
, /* pc_relative */
132 complain_overflow_signed
, /* complain on overflow */
133 nios2_elf32_pcrel16_relocate
, /* special function */
134 "R_NIOS2_PCREL16", /* name */
135 FALSE
, /* partial_inplace */
136 0x003fffc0, /* src_mask */
137 0x003fffc0, /* dest_mask */
138 TRUE
), /* pcrel_offset */
140 HOWTO (R_NIOS2_CALL26
, /* type */
142 2, /* size (0 = byte, 1 = short, 2 = long) */
144 FALSE
, /* pc_relative */
146 complain_overflow_dont
, /* complain on overflow */
147 nios2_elf32_call26_relocate
, /* special function */
148 "R_NIOS2_CALL26", /* name */
149 FALSE
, /* partial_inplace */
150 0xffffffc0, /* src_mask */
151 0xffffffc0, /* dst_mask */
152 FALSE
), /* pcrel_offset */
160 complain_overflow_bitfield
,
161 bfd_elf_generic_reloc
,
168 HOWTO (R_NIOS2_CACHE_OPX
,
174 complain_overflow_bitfield
,
175 bfd_elf_generic_reloc
,
188 complain_overflow_bitfield
,
189 bfd_elf_generic_reloc
,
202 complain_overflow_bitfield
,
203 bfd_elf_generic_reloc
,
216 complain_overflow_dont
,
217 nios2_elf32_hi16_relocate
,
230 complain_overflow_dont
,
231 nios2_elf32_lo16_relocate
,
238 HOWTO (R_NIOS2_HIADJ16
,
244 complain_overflow_dont
,
245 nios2_elf32_hiadj16_relocate
,
252 HOWTO (R_NIOS2_BFD_RELOC_32
,
258 complain_overflow_dont
,
259 bfd_elf_generic_reloc
,
260 "R_NIOS2_BFD_RELOC32",
266 HOWTO (R_NIOS2_BFD_RELOC_16
,
272 complain_overflow_bitfield
,
273 bfd_elf_generic_reloc
,
274 "R_NIOS2_BFD_RELOC16",
280 HOWTO (R_NIOS2_BFD_RELOC_8
,
286 complain_overflow_bitfield
,
287 bfd_elf_generic_reloc
,
288 "R_NIOS2_BFD_RELOC8",
294 HOWTO (R_NIOS2_GPREL
,
300 complain_overflow_dont
,
301 nios2_elf32_gprel_relocate
,
308 HOWTO (R_NIOS2_GNU_VTINHERIT
,
314 complain_overflow_dont
,
316 "R_NIOS2_GNU_VTINHERIT",
322 HOWTO (R_NIOS2_GNU_VTENTRY
,
328 complain_overflow_dont
,
329 _bfd_elf_rel_vtable_reloc_fn
,
330 "R_NIOS2_GNU_VTENTRY",
342 complain_overflow_dont
,
343 nios2_elf32_ujmp_relocate
,
356 complain_overflow_dont
,
357 nios2_elf32_cjmp_relocate
,
364 HOWTO (R_NIOS2_CALLR
,
370 complain_overflow_dont
,
371 nios2_elf32_callr_relocate
,
378 HOWTO (R_NIOS2_ALIGN
,
384 complain_overflow_dont
,
385 nios2_elf32_ignore_reloc
,
393 HOWTO (R_NIOS2_GOT16
,
399 complain_overflow_bitfield
,
400 bfd_elf_generic_reloc
,
407 HOWTO (R_NIOS2_CALL16
,
413 complain_overflow_bitfield
,
414 bfd_elf_generic_reloc
,
421 HOWTO (R_NIOS2_GOTOFF_LO
,
427 complain_overflow_dont
,
428 bfd_elf_generic_reloc
,
435 HOWTO (R_NIOS2_GOTOFF_HA
,
441 complain_overflow_dont
,
442 bfd_elf_generic_reloc
,
449 HOWTO (R_NIOS2_PCREL_LO
,
455 complain_overflow_dont
,
456 nios2_elf32_pcrel_lo16_relocate
,
463 HOWTO (R_NIOS2_PCREL_HA
,
467 FALSE
, /* This is a PC-relative relocation, but we need to subtract
468 PC ourselves before the HIADJ. */
470 complain_overflow_dont
,
471 nios2_elf32_pcrel_hiadj16_relocate
,
478 HOWTO (R_NIOS2_TLS_GD16
,
484 complain_overflow_bitfield
,
485 bfd_elf_generic_reloc
,
492 HOWTO (R_NIOS2_TLS_LDM16
,
498 complain_overflow_bitfield
,
499 bfd_elf_generic_reloc
,
506 HOWTO (R_NIOS2_TLS_LDO16
,
512 complain_overflow_bitfield
,
513 bfd_elf_generic_reloc
,
520 HOWTO (R_NIOS2_TLS_IE16
,
526 complain_overflow_bitfield
,
527 bfd_elf_generic_reloc
,
534 HOWTO (R_NIOS2_TLS_LE16
,
540 complain_overflow_bitfield
,
541 bfd_elf_generic_reloc
,
548 HOWTO (R_NIOS2_TLS_DTPMOD
,
554 complain_overflow_dont
,
555 bfd_elf_generic_reloc
,
556 "R_NIOS2_TLS_DTPMOD",
562 HOWTO (R_NIOS2_TLS_DTPREL
,
568 complain_overflow_dont
,
569 bfd_elf_generic_reloc
,
570 "R_NIOS2_TLS_DTPREL",
576 HOWTO (R_NIOS2_TLS_TPREL
,
582 complain_overflow_dont
,
583 bfd_elf_generic_reloc
,
596 complain_overflow_dont
,
597 bfd_elf_generic_reloc
,
604 HOWTO (R_NIOS2_GLOB_DAT
,
610 complain_overflow_dont
,
611 bfd_elf_generic_reloc
,
618 HOWTO (R_NIOS2_JUMP_SLOT
,
624 complain_overflow_dont
,
625 bfd_elf_generic_reloc
,
632 HOWTO (R_NIOS2_RELATIVE
,
638 complain_overflow_dont
,
639 bfd_elf_generic_reloc
,
646 HOWTO (R_NIOS2_GOTOFF
,
652 complain_overflow_dont
,
653 bfd_elf_generic_reloc
,
660 HOWTO (R_NIOS2_CALL26_NOAT
, /* type */
662 2, /* size (0 = byte, 1 = short, 2 = long) */
664 FALSE
, /* pc_relative */
666 complain_overflow_dont
, /* complain on overflow */
667 nios2_elf32_call26_relocate
, /* special function */
668 "R_NIOS2_CALL26_NOAT", /* name */
669 FALSE
, /* partial_inplace */
670 0xffffffc0, /* src_mask */
671 0xffffffc0, /* dst_mask */
672 FALSE
), /* pcrel_offset */
674 HOWTO (R_NIOS2_GOT_LO
,
680 complain_overflow_dont
,
681 bfd_elf_generic_reloc
,
688 HOWTO (R_NIOS2_GOT_HA
,
694 complain_overflow_dont
,
695 bfd_elf_generic_reloc
,
702 HOWTO (R_NIOS2_CALL_LO
,
708 complain_overflow_dont
,
709 bfd_elf_generic_reloc
,
716 HOWTO (R_NIOS2_CALL_HA
,
722 complain_overflow_dont
,
723 bfd_elf_generic_reloc
,
730 /* Add other relocations here. */
733 static reloc_howto_type elf_nios2_r2_howto_table_rel
[] = {
735 HOWTO (R_NIOS2_NONE
, /* type */
737 0, /* size (0 = byte, 1 = short, 2 = long) */
739 FALSE
, /* pc_relative */
741 complain_overflow_dont
, /* complain_on_overflow */
742 bfd_elf_generic_reloc
, /* special_function */
743 "R_NIOS2_NONE", /* name */
744 FALSE
, /* partial_inplace */
747 FALSE
), /* pcrel_offset */
749 /* 16-bit signed immediate relocation. */
750 HOWTO (R_NIOS2_S16
, /* type */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
754 FALSE
, /* pc_relative */
756 complain_overflow_signed
, /* complain on overflow */
757 bfd_elf_generic_reloc
, /* special function */
758 "R_NIOS2_S16", /* name */
759 FALSE
, /* partial_inplace */
760 0xffff0000, /* src_mask */
761 0xffff0000, /* dest_mask */
762 FALSE
), /* pcrel_offset */
764 /* 16-bit unsigned immediate relocation. */
765 HOWTO (R_NIOS2_U16
, /* type */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
769 FALSE
, /* pc_relative */
771 complain_overflow_unsigned
, /* complain on overflow */
772 bfd_elf_generic_reloc
, /* special function */
773 "R_NIOS2_U16", /* name */
774 FALSE
, /* partial_inplace */
775 0xffff0000, /* src_mask */
776 0xffff0000, /* dest_mask */
777 FALSE
), /* pcrel_offset */
779 HOWTO (R_NIOS2_PCREL16
, /* type */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
783 TRUE
, /* pc_relative */
785 complain_overflow_signed
, /* complain on overflow */
786 nios2_elf32_pcrel16_relocate
, /* special function */
787 "R_NIOS2_PCREL16", /* name */
788 FALSE
, /* partial_inplace */
789 0xffff0000, /* src_mask */
790 0xffff0000, /* dest_mask */
791 TRUE
), /* pcrel_offset */
793 HOWTO (R_NIOS2_CALL26
, /* type */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
797 FALSE
, /* pc_relative */
799 complain_overflow_dont
, /* complain on overflow */
800 nios2_elf32_call26_relocate
, /* special function */
801 "R_NIOS2_CALL26", /* name */
802 FALSE
, /* partial_inplace */
803 0xffffffc0, /* src_mask */
804 0xffffffc0, /* dst_mask */
805 FALSE
), /* pcrel_offset */
813 complain_overflow_bitfield
,
814 bfd_elf_generic_reloc
,
821 HOWTO (R_NIOS2_CACHE_OPX
,
827 complain_overflow_bitfield
,
828 bfd_elf_generic_reloc
,
841 complain_overflow_bitfield
,
842 bfd_elf_generic_reloc
,
855 complain_overflow_bitfield
,
856 bfd_elf_generic_reloc
,
869 complain_overflow_dont
,
870 nios2_elf32_hi16_relocate
,
883 complain_overflow_dont
,
884 nios2_elf32_lo16_relocate
,
891 HOWTO (R_NIOS2_HIADJ16
,
897 complain_overflow_dont
,
898 nios2_elf32_hiadj16_relocate
,
905 HOWTO (R_NIOS2_BFD_RELOC_32
,
911 complain_overflow_dont
,
912 bfd_elf_generic_reloc
,
913 "R_NIOS2_BFD_RELOC32",
919 HOWTO (R_NIOS2_BFD_RELOC_16
,
925 complain_overflow_bitfield
,
926 bfd_elf_generic_reloc
,
927 "R_NIOS2_BFD_RELOC16",
933 HOWTO (R_NIOS2_BFD_RELOC_8
,
939 complain_overflow_bitfield
,
940 bfd_elf_generic_reloc
,
941 "R_NIOS2_BFD_RELOC8",
947 HOWTO (R_NIOS2_GPREL
,
953 complain_overflow_dont
,
954 nios2_elf32_gprel_relocate
,
961 HOWTO (R_NIOS2_GNU_VTINHERIT
,
967 complain_overflow_dont
,
969 "R_NIOS2_GNU_VTINHERIT",
975 HOWTO (R_NIOS2_GNU_VTENTRY
,
981 complain_overflow_dont
,
982 _bfd_elf_rel_vtable_reloc_fn
,
983 "R_NIOS2_GNU_VTENTRY",
995 complain_overflow_dont
,
996 nios2_elf32_ujmp_relocate
,
1003 HOWTO (R_NIOS2_CJMP
,
1009 complain_overflow_dont
,
1010 nios2_elf32_cjmp_relocate
,
1017 HOWTO (R_NIOS2_CALLR
,
1023 complain_overflow_dont
,
1024 nios2_elf32_callr_relocate
,
1031 HOWTO (R_NIOS2_ALIGN
,
1037 complain_overflow_dont
,
1038 nios2_elf32_ignore_reloc
,
1045 HOWTO (R_NIOS2_GOT16
,
1051 complain_overflow_bitfield
,
1052 bfd_elf_generic_reloc
,
1059 HOWTO (R_NIOS2_CALL16
,
1065 complain_overflow_bitfield
,
1066 bfd_elf_generic_reloc
,
1073 HOWTO (R_NIOS2_GOTOFF_LO
,
1079 complain_overflow_dont
,
1080 bfd_elf_generic_reloc
,
1081 "R_NIOS2_GOTOFF_LO",
1087 HOWTO (R_NIOS2_GOTOFF_HA
,
1093 complain_overflow_dont
,
1094 bfd_elf_generic_reloc
,
1095 "R_NIOS2_GOTOFF_HA",
1101 HOWTO (R_NIOS2_PCREL_LO
,
1107 complain_overflow_dont
,
1108 nios2_elf32_pcrel_lo16_relocate
,
1115 HOWTO (R_NIOS2_PCREL_HA
,
1119 FALSE
, /* This is a PC-relative relocation, but we need to subtract
1120 PC ourselves before the HIADJ. */
1122 complain_overflow_dont
,
1123 nios2_elf32_pcrel_hiadj16_relocate
,
1130 HOWTO (R_NIOS2_TLS_GD16
,
1136 complain_overflow_bitfield
,
1137 bfd_elf_generic_reloc
,
1144 HOWTO (R_NIOS2_TLS_LDM16
,
1150 complain_overflow_bitfield
,
1151 bfd_elf_generic_reloc
,
1152 "R_NIOS2_TLS_LDM16",
1158 HOWTO (R_NIOS2_TLS_LDO16
,
1164 complain_overflow_bitfield
,
1165 bfd_elf_generic_reloc
,
1166 "R_NIOS2_TLS_LDO16",
1172 HOWTO (R_NIOS2_TLS_IE16
,
1178 complain_overflow_bitfield
,
1179 bfd_elf_generic_reloc
,
1186 HOWTO (R_NIOS2_TLS_LE16
,
1192 complain_overflow_bitfield
,
1193 bfd_elf_generic_reloc
,
1200 HOWTO (R_NIOS2_TLS_DTPMOD
,
1206 complain_overflow_dont
,
1207 bfd_elf_generic_reloc
,
1208 "R_NIOS2_TLS_DTPMOD",
1214 HOWTO (R_NIOS2_TLS_DTPREL
,
1220 complain_overflow_dont
,
1221 bfd_elf_generic_reloc
,
1222 "R_NIOS2_TLS_DTPREL",
1228 HOWTO (R_NIOS2_TLS_TPREL
,
1234 complain_overflow_dont
,
1235 bfd_elf_generic_reloc
,
1236 "R_NIOS2_TLS_TPREL",
1242 HOWTO (R_NIOS2_COPY
,
1248 complain_overflow_dont
,
1249 bfd_elf_generic_reloc
,
1256 HOWTO (R_NIOS2_GLOB_DAT
,
1262 complain_overflow_dont
,
1263 bfd_elf_generic_reloc
,
1270 HOWTO (R_NIOS2_JUMP_SLOT
,
1276 complain_overflow_dont
,
1277 bfd_elf_generic_reloc
,
1278 "R_NIOS2_JUMP_SLOT",
1284 HOWTO (R_NIOS2_RELATIVE
,
1290 complain_overflow_dont
,
1291 bfd_elf_generic_reloc
,
1298 HOWTO (R_NIOS2_GOTOFF
,
1304 complain_overflow_dont
,
1305 bfd_elf_generic_reloc
,
1312 HOWTO (R_NIOS2_CALL26_NOAT
, /* type */
1314 2, /* size (0 = byte, 1 = short, 2 = long) */
1316 FALSE
, /* pc_relative */
1318 complain_overflow_dont
, /* complain on overflow */
1319 nios2_elf32_call26_relocate
, /* special function */
1320 "R_NIOS2_CALL26_NOAT", /* name */
1321 FALSE
, /* partial_inplace */
1322 0xffffffc0, /* src_mask */
1323 0xffffffc0, /* dst_mask */
1324 FALSE
), /* pcrel_offset */
1326 HOWTO (R_NIOS2_GOT_LO
,
1332 complain_overflow_dont
,
1333 bfd_elf_generic_reloc
,
1340 HOWTO (R_NIOS2_GOT_HA
,
1346 complain_overflow_dont
,
1347 bfd_elf_generic_reloc
,
1354 HOWTO (R_NIOS2_CALL_LO
,
1360 complain_overflow_dont
,
1361 bfd_elf_generic_reloc
,
1368 HOWTO (R_NIOS2_CALL_HA
,
1374 complain_overflow_dont
,
1375 bfd_elf_generic_reloc
,
1382 HOWTO (R_NIOS2_R2_S12
,
1388 complain_overflow_signed
,
1389 bfd_elf_generic_reloc
,
1396 HOWTO (R_NIOS2_R2_I10_1_PCREL
,
1402 complain_overflow_signed
,
1403 bfd_elf_generic_reloc
, /* FIXME? */
1404 "R_NIOS2_R2_I10_1_PCREL",
1410 HOWTO (R_NIOS2_R2_T1I7_1_PCREL
,
1416 complain_overflow_signed
,
1417 bfd_elf_generic_reloc
, /* FIXME? */
1418 "R_NIOS2_R2_T1I7_1_PCREL",
1424 HOWTO (R_NIOS2_R2_T1I7_2
,
1430 complain_overflow_unsigned
,
1431 bfd_elf_generic_reloc
,
1432 "R_NIOS2_R2_T1I7_2",
1438 HOWTO (R_NIOS2_R2_T2I4
,
1444 complain_overflow_unsigned
,
1445 bfd_elf_generic_reloc
,
1452 HOWTO (R_NIOS2_R2_T2I4_1
,
1458 complain_overflow_unsigned
,
1459 bfd_elf_generic_reloc
,
1460 "R_NIOS2_R2_T2I4_1",
1466 HOWTO (R_NIOS2_R2_T2I4_2
,
1472 complain_overflow_unsigned
,
1473 bfd_elf_generic_reloc
,
1474 "R_NIOS2_R2_T2I4_2",
1480 HOWTO (R_NIOS2_R2_X1I7_2
,
1486 complain_overflow_unsigned
,
1487 bfd_elf_generic_reloc
,
1488 "R_NIOS2_R2_X1I7_2",
1494 HOWTO (R_NIOS2_R2_X2L5
,
1500 complain_overflow_unsigned
,
1501 bfd_elf_generic_reloc
,
1508 HOWTO (R_NIOS2_R2_F1I5_2
,
1514 complain_overflow_unsigned
,
1515 bfd_elf_generic_reloc
,
1516 "R_NIOS2_R2_F1L5_2",
1522 HOWTO (R_NIOS2_R2_L5I4X1
,
1528 complain_overflow_unsigned
,
1529 bfd_elf_generic_reloc
,
1530 "R_NIOS2_R2_L5I4X1",
1536 HOWTO (R_NIOS2_R2_T1X1I6
,
1542 complain_overflow_unsigned
,
1543 bfd_elf_generic_reloc
,
1544 "R_NIOS2_R2_T1X1I6",
1550 HOWTO (R_NIOS2_R2_T1X1I6_2
,
1556 complain_overflow_unsigned
,
1557 bfd_elf_generic_reloc
,
1558 "R_NIOS2_R2_T1I1X6_2",
1564 /* Add other relocations here. */
1567 static unsigned char elf_code_to_howto_index
[R_NIOS2_ILLEGAL
+ 1];
1570 /* Return true if producing output for a R2 BFD. */
1571 #define BFD_IS_R2(abfd) (bfd_get_mach (abfd) == bfd_mach_nios2r2)
1573 /* Return the howto for relocation RTYPE. */
1574 static reloc_howto_type
*
1575 lookup_howto (unsigned int rtype
, bfd
*abfd
)
1577 static int initialized
= 0;
1579 /* R2 relocations are a superset of R1, so use that for the lookup
1581 int r1_howto_tbl_size
= (int) (sizeof (elf_nios2_r1_howto_table_rel
)
1582 / sizeof (elf_nios2_r1_howto_table_rel
[0]));
1583 int r2_howto_tbl_size
= (int) (sizeof (elf_nios2_r2_howto_table_rel
)
1584 / sizeof (elf_nios2_r2_howto_table_rel
[0]));
1589 memset (elf_code_to_howto_index
, 0xff,
1590 sizeof (elf_code_to_howto_index
));
1591 for (i
= 0; i
< r2_howto_tbl_size
; i
++)
1593 elf_code_to_howto_index
[elf_nios2_r2_howto_table_rel
[i
].type
] = i
;
1594 if (i
< r1_howto_tbl_size
)
1595 BFD_ASSERT (elf_nios2_r2_howto_table_rel
[i
].type
1596 == elf_nios2_r1_howto_table_rel
[i
].type
);
1600 BFD_ASSERT (rtype
<= R_NIOS2_ILLEGAL
);
1601 i
= elf_code_to_howto_index
[rtype
];
1602 if (BFD_IS_R2 (abfd
))
1604 if (i
>= r2_howto_tbl_size
)
1606 return elf_nios2_r2_howto_table_rel
+ i
;
1610 if (i
>= r1_howto_tbl_size
)
1612 return elf_nios2_r1_howto_table_rel
+ i
;
1616 /* Map for converting BFD reloc types to Nios II reloc types. */
1617 struct elf_reloc_map
1619 bfd_reloc_code_real_type bfd_val
;
1620 enum elf_nios2_reloc_type elf_val
;
1623 static const struct elf_reloc_map nios2_reloc_map
[] = {
1624 {BFD_RELOC_NONE
, R_NIOS2_NONE
},
1625 {BFD_RELOC_NIOS2_S16
, R_NIOS2_S16
},
1626 {BFD_RELOC_NIOS2_U16
, R_NIOS2_U16
},
1627 {BFD_RELOC_16_PCREL
, R_NIOS2_PCREL16
},
1628 {BFD_RELOC_NIOS2_CALL26
, R_NIOS2_CALL26
},
1629 {BFD_RELOC_NIOS2_IMM5
, R_NIOS2_IMM5
},
1630 {BFD_RELOC_NIOS2_CACHE_OPX
, R_NIOS2_CACHE_OPX
},
1631 {BFD_RELOC_NIOS2_IMM6
, R_NIOS2_IMM6
},
1632 {BFD_RELOC_NIOS2_IMM8
, R_NIOS2_IMM8
},
1633 {BFD_RELOC_NIOS2_HI16
, R_NIOS2_HI16
},
1634 {BFD_RELOC_NIOS2_LO16
, R_NIOS2_LO16
},
1635 {BFD_RELOC_NIOS2_HIADJ16
, R_NIOS2_HIADJ16
},
1636 {BFD_RELOC_32
, R_NIOS2_BFD_RELOC_32
},
1637 {BFD_RELOC_16
, R_NIOS2_BFD_RELOC_16
},
1638 {BFD_RELOC_8
, R_NIOS2_BFD_RELOC_8
},
1639 {BFD_RELOC_NIOS2_GPREL
, R_NIOS2_GPREL
},
1640 {BFD_RELOC_VTABLE_INHERIT
, R_NIOS2_GNU_VTINHERIT
},
1641 {BFD_RELOC_VTABLE_ENTRY
, R_NIOS2_GNU_VTENTRY
},
1642 {BFD_RELOC_NIOS2_UJMP
, R_NIOS2_UJMP
},
1643 {BFD_RELOC_NIOS2_CJMP
, R_NIOS2_CJMP
},
1644 {BFD_RELOC_NIOS2_CALLR
, R_NIOS2_CALLR
},
1645 {BFD_RELOC_NIOS2_ALIGN
, R_NIOS2_ALIGN
},
1646 {BFD_RELOC_NIOS2_GOT16
, R_NIOS2_GOT16
},
1647 {BFD_RELOC_NIOS2_CALL16
, R_NIOS2_CALL16
},
1648 {BFD_RELOC_NIOS2_GOTOFF_LO
, R_NIOS2_GOTOFF_LO
},
1649 {BFD_RELOC_NIOS2_GOTOFF_HA
, R_NIOS2_GOTOFF_HA
},
1650 {BFD_RELOC_NIOS2_PCREL_LO
, R_NIOS2_PCREL_LO
},
1651 {BFD_RELOC_NIOS2_PCREL_HA
, R_NIOS2_PCREL_HA
},
1652 {BFD_RELOC_NIOS2_TLS_GD16
, R_NIOS2_TLS_GD16
},
1653 {BFD_RELOC_NIOS2_TLS_LDM16
, R_NIOS2_TLS_LDM16
},
1654 {BFD_RELOC_NIOS2_TLS_LDO16
, R_NIOS2_TLS_LDO16
},
1655 {BFD_RELOC_NIOS2_TLS_IE16
, R_NIOS2_TLS_IE16
},
1656 {BFD_RELOC_NIOS2_TLS_LE16
, R_NIOS2_TLS_LE16
},
1657 {BFD_RELOC_NIOS2_TLS_DTPMOD
, R_NIOS2_TLS_DTPMOD
},
1658 {BFD_RELOC_NIOS2_TLS_DTPREL
, R_NIOS2_TLS_DTPREL
},
1659 {BFD_RELOC_NIOS2_TLS_TPREL
, R_NIOS2_TLS_TPREL
},
1660 {BFD_RELOC_NIOS2_COPY
, R_NIOS2_COPY
},
1661 {BFD_RELOC_NIOS2_GLOB_DAT
, R_NIOS2_GLOB_DAT
},
1662 {BFD_RELOC_NIOS2_JUMP_SLOT
, R_NIOS2_JUMP_SLOT
},
1663 {BFD_RELOC_NIOS2_RELATIVE
, R_NIOS2_RELATIVE
},
1664 {BFD_RELOC_NIOS2_GOTOFF
, R_NIOS2_GOTOFF
},
1665 {BFD_RELOC_NIOS2_CALL26_NOAT
, R_NIOS2_CALL26_NOAT
},
1666 {BFD_RELOC_NIOS2_GOT_LO
, R_NIOS2_GOT_LO
},
1667 {BFD_RELOC_NIOS2_GOT_HA
, R_NIOS2_GOT_HA
},
1668 {BFD_RELOC_NIOS2_CALL_LO
, R_NIOS2_CALL_LO
},
1669 {BFD_RELOC_NIOS2_CALL_HA
, R_NIOS2_CALL_HA
},
1670 {BFD_RELOC_NIOS2_R2_S12
, R_NIOS2_R2_S12
},
1671 {BFD_RELOC_NIOS2_R2_I10_1_PCREL
, R_NIOS2_R2_I10_1_PCREL
},
1672 {BFD_RELOC_NIOS2_R2_T1I7_1_PCREL
, R_NIOS2_R2_T1I7_1_PCREL
},
1673 {BFD_RELOC_NIOS2_R2_T1I7_2
, R_NIOS2_R2_T1I7_2
},
1674 {BFD_RELOC_NIOS2_R2_T2I4
, R_NIOS2_R2_T2I4
},
1675 {BFD_RELOC_NIOS2_R2_T2I4_1
, R_NIOS2_R2_T2I4_1
},
1676 {BFD_RELOC_NIOS2_R2_T2I4_2
, R_NIOS2_R2_T2I4_2
},
1677 {BFD_RELOC_NIOS2_R2_X1I7_2
, R_NIOS2_R2_X1I7_2
},
1678 {BFD_RELOC_NIOS2_R2_X2L5
, R_NIOS2_R2_X2L5
},
1679 {BFD_RELOC_NIOS2_R2_F1I5_2
, R_NIOS2_R2_F1I5_2
},
1680 {BFD_RELOC_NIOS2_R2_L5I4X1
, R_NIOS2_R2_L5I4X1
},
1681 {BFD_RELOC_NIOS2_R2_T1X1I6
, R_NIOS2_R2_T1X1I6
},
1682 {BFD_RELOC_NIOS2_R2_T1X1I6_2
, R_NIOS2_R2_T1X1I6_2
},
1685 enum elf32_nios2_stub_type
1687 nios2_stub_call26_before
,
1688 nios2_stub_call26_after
,
1692 struct elf32_nios2_stub_hash_entry
1694 /* Base hash table entry structure. */
1695 struct bfd_hash_entry bh_root
;
1697 /* The stub section. */
1700 /* Offset within stub_sec of the beginning of this stub. */
1701 bfd_vma stub_offset
;
1703 /* Given the symbol's value and its section we can determine its final
1704 value when building the stubs (so the stub knows where to jump. */
1705 bfd_vma target_value
;
1706 asection
*target_section
;
1708 enum elf32_nios2_stub_type stub_type
;
1710 /* The symbol table entry, if any, that this was derived from. */
1711 struct elf32_nios2_link_hash_entry
*hh
;
1713 /* And the reloc addend that this was derived from. */
1716 /* Where this stub is being called from, or, in the case of combined
1717 stub sections, the first input section in the group. */
1721 #define nios2_stub_hash_entry(ent) \
1722 ((struct elf32_nios2_stub_hash_entry *)(ent))
1724 #define nios2_stub_hash_lookup(table, string, create, copy) \
1725 ((struct elf32_nios2_stub_hash_entry *) \
1726 bfd_hash_lookup ((table), (string), (create), (copy)))
1729 /* The Nios II linker needs to keep track of the number of relocs that it
1730 decides to copy as dynamic relocs in check_relocs for each symbol.
1731 This is so that it can later discard them if they are found to be
1732 unnecessary. We store the information in a field extending the
1733 regular ELF linker hash table. */
1735 struct elf32_nios2_dyn_relocs
1737 struct elf32_nios2_dyn_relocs
*next
;
1739 /* The input section of the reloc. */
1742 /* Total number of relocs copied for the input section. */
1743 bfd_size_type count
;
1745 /* Number of pc-relative relocs copied for the input section. */
1746 bfd_size_type pc_count
;
1749 /* Nios II ELF linker hash entry. */
1751 struct elf32_nios2_link_hash_entry
1753 struct elf_link_hash_entry root
;
1755 /* A pointer to the most recently used stub hash entry against this
1757 struct elf32_nios2_stub_hash_entry
*hsh_cache
;
1759 /* Track dynamic relocs copied for this symbol. */
1760 struct elf32_nios2_dyn_relocs
*dyn_relocs
;
1762 #define GOT_UNKNOWN 0
1763 #define GOT_NORMAL 1
1764 #define GOT_TLS_GD 2
1765 #define GOT_TLS_IE 4
1766 unsigned char tls_type
;
1768 /* We need to detect and take special action for symbols which are only
1769 referenced with %call() and not with %got(). Such symbols do not need
1770 a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy
1771 linking will not work if the dynamic GOT reloc exists.
1772 To check for this condition efficiently, we compare got_types_used against
1774 (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED.
1778 unsigned char got_types_used
;
1781 #define elf32_nios2_hash_entry(ent) \
1782 ((struct elf32_nios2_link_hash_entry *) (ent))
1784 /* Get the Nios II elf linker hash table from a link_info structure. */
1785 #define elf32_nios2_hash_table(info) \
1786 ((struct elf32_nios2_link_hash_table *) ((info)->hash))
1788 /* Nios II ELF linker hash table. */
1789 struct elf32_nios2_link_hash_table
1791 /* The main hash table. */
1792 struct elf_link_hash_table root
;
1794 /* The stub hash table. */
1795 struct bfd_hash_table bstab
;
1797 /* Linker stub bfd. */
1800 /* Linker call-backs. */
1801 asection
* (*add_stub_section
) (const char *, asection
*, bfd_boolean
);
1802 void (*layout_sections_again
) (void);
1804 /* Array to keep track of which stub sections have been created, and
1805 information on stub grouping. */
1808 /* These are the section to which stubs in the group will be
1810 asection
*first_sec
, *last_sec
;
1811 /* The stub sections. There might be stubs inserted either before
1812 or after the real section.*/
1813 asection
*first_stub_sec
, *last_stub_sec
;
1816 /* Assorted information used by nios2_elf32_size_stubs. */
1817 unsigned int bfd_count
;
1818 unsigned int top_index
;
1819 asection
**input_list
;
1820 Elf_Internal_Sym
**all_local_syms
;
1822 /* Short-cuts to get to dynamic linker sections. */
1827 /* GOT pointer symbol _gp_got. */
1828 struct elf_link_hash_entry
*h_gp_got
;
1831 bfd_signed_vma refcount
;
1835 /* Small local sym cache. */
1836 struct sym_cache sym_cache
;
1841 struct nios2_elf32_obj_tdata
1843 struct elf_obj_tdata root
;
1845 /* tls_type for each local got entry. */
1846 char *local_got_tls_type
;
1848 /* TRUE if TLS GD relocs have been seen for this object. */
1849 bfd_boolean has_tlsgd
;
1852 #define elf32_nios2_tdata(abfd) \
1853 ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any)
1855 #define elf32_nios2_local_got_tls_type(abfd) \
1856 (elf32_nios2_tdata (abfd)->local_got_tls_type)
1858 /* The name of the dynamic interpreter. This is put in the .interp
1860 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1862 /* PLT implementation for position-dependent code. */
1863 static const bfd_vma nios2_plt_entry
[] = { /* .PLTn: */
1864 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */
1865 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */
1866 0x7800683a /* jmp r15 */
1869 static const bfd_vma nios2_plt0_entry
[] = { /* .PLTresolve */
1870 0x03800034, /* movhi r14, %hiadj(res_0) */
1871 0x73800004, /* addi r14, r14, %lo(res_0) */
1872 0x7b9fc83a, /* sub r15, r15, r14 */
1873 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1874 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1875 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1876 0x6800683a /* jmp r13 */
1879 /* PLT implementation for position-independent code. */
1880 static const bfd_vma nios2_so_plt_entry
[] = { /* .PLTn */
1881 0x03c00034, /* movhi r15, %hiadj(index * 4) */
1882 0x7bc00004, /* addi r15, r15, %lo(index * 4) */
1883 0x00000006 /* br .PLTresolve */
1886 static const bfd_vma nios2_so_plt0_entry
[] = { /* .PLTresolve */
1887 0x001ce03a, /* nextpc r14 */
1888 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1889 0x6b9b883a, /* add r13, r13, r14 */
1890 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1891 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1892 0x6800683a /* jmp r13 */
1896 static const bfd_vma nios2_call26_stub_entry
[] = {
1897 0x00400034, /* orhi at, r0, %hiadj(dest) */
1898 0x08400004, /* addi at, at, %lo(dest) */
1899 0x0800683a /* jmp at */
1902 /* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */
1904 nios2_elf32_install_imm16 (asection
*sec
, bfd_vma offset
, bfd_vma value
)
1906 bfd_vma word
= bfd_get_32 (sec
->owner
, sec
->contents
+ offset
);
1908 BFD_ASSERT (value
<= 0xffff || ((bfd_signed_vma
) value
) >= -0xffff);
1910 bfd_put_32 (sec
->owner
, word
| ((value
& 0xffff) << 6),
1911 sec
->contents
+ offset
);
1914 /* Install COUNT 32-bit values DATA starting at offset OFFSET into
1917 nios2_elf32_install_data (asection
*sec
, const bfd_vma
*data
, bfd_vma offset
,
1922 bfd_put_32 (sec
->owner
, *data
, sec
->contents
+ offset
);
1928 /* The usual way of loading a 32-bit constant into a Nios II register is to
1929 load the high 16 bits in one instruction and then add the low 16 bits with
1930 a signed add. This means that the high halfword needs to be adjusted to
1931 compensate for the sign bit of the low halfword. This function returns the
1932 adjusted high halfword for a given 32-bit constant. */
1934 bfd_vma
hiadj (bfd_vma symbol_value
)
1936 return ((symbol_value
+ 0x8000) >> 16) & 0xffff;
1939 /* Implement elf_backend_grok_prstatus:
1940 Support for core dump NOTE sections. */
1942 nios2_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
1947 switch (note
->descsz
)
1952 case 212: /* Linux/Nios II */
1954 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
1957 elf_tdata (abfd
)->core
->pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
1966 /* Make a ".reg/999" section. */
1967 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
1968 size
, note
->descpos
+ offset
);
1971 /* Implement elf_backend_grok_psinfo. */
1973 nios2_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
1975 switch (note
->descsz
)
1980 case 124: /* Linux/Nios II elf_prpsinfo */
1981 elf_tdata (abfd
)->core
->program
1982 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
1983 elf_tdata (abfd
)->core
->command
1984 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
1987 /* Note that for some reason, a spurious space is tacked
1988 onto the end of the args in some (at least one anyway)
1989 implementations, so strip it off if it exists. */
1992 char *command
= elf_tdata (abfd
)->core
->command
;
1993 int n
= strlen (command
);
1995 if (0 < n
&& command
[n
- 1] == ' ')
1996 command
[n
- 1] = '\0';
2002 /* Assorted hash table functions. */
2004 /* Initialize an entry in the stub hash table. */
2005 static struct bfd_hash_entry
*
2006 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
2007 struct bfd_hash_table
*table
,
2010 /* Allocate the structure if it has not already been allocated by a
2014 entry
= bfd_hash_allocate (table
,
2015 sizeof (struct elf32_nios2_stub_hash_entry
));
2020 /* Call the allocation method of the superclass. */
2021 entry
= bfd_hash_newfunc (entry
, table
, string
);
2024 struct elf32_nios2_stub_hash_entry
*hsh
;
2026 /* Initialize the local fields. */
2027 hsh
= (struct elf32_nios2_stub_hash_entry
*) entry
;
2028 hsh
->stub_sec
= NULL
;
2029 hsh
->stub_offset
= 0;
2030 hsh
->target_value
= 0;
2031 hsh
->target_section
= NULL
;
2032 hsh
->stub_type
= nios2_stub_none
;
2040 /* Create an entry in a Nios II ELF linker hash table. */
2041 static struct bfd_hash_entry
*
2042 link_hash_newfunc (struct bfd_hash_entry
*entry
,
2043 struct bfd_hash_table
*table
, const char *string
)
2045 /* Allocate the structure if it has not already been allocated by a
2049 entry
= bfd_hash_allocate (table
,
2050 sizeof (struct elf32_nios2_link_hash_entry
));
2055 /* Call the allocation method of the superclass. */
2056 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
2059 struct elf32_nios2_link_hash_entry
*eh
;
2061 eh
= (struct elf32_nios2_link_hash_entry
*) entry
;
2062 eh
->hsh_cache
= NULL
;
2063 eh
->dyn_relocs
= NULL
;
2064 eh
->tls_type
= GOT_UNKNOWN
;
2065 eh
->got_types_used
= 0;
2071 /* Section name for stubs is the associated section name plus this
2073 #define STUB_SUFFIX ".stub"
2075 /* Build a name for an entry in the stub hash table. */
2077 nios2_stub_name (const asection
*input_section
,
2078 const asection
*sym_sec
,
2079 const struct elf32_nios2_link_hash_entry
*hh
,
2080 const Elf_Internal_Rela
*rel
,
2081 enum elf32_nios2_stub_type stub_type
)
2085 char stubpos
= (stub_type
== nios2_stub_call26_before
) ? 'b' : 'a';
2089 len
= 8 + 1 + 1 + 1+ strlen (hh
->root
.root
.root
.string
) + 1 + 8 + 1;
2090 stub_name
= bfd_malloc (len
);
2091 if (stub_name
!= NULL
)
2093 sprintf (stub_name
, "%08x_%c_%s+%x",
2094 input_section
->id
& 0xffffffff,
2096 hh
->root
.root
.root
.string
,
2097 (int) rel
->r_addend
& 0xffffffff);
2102 len
= 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1;
2103 stub_name
= bfd_malloc (len
);
2104 if (stub_name
!= NULL
)
2106 sprintf (stub_name
, "%08x_%c_%x:%x+%x",
2107 input_section
->id
& 0xffffffff,
2109 sym_sec
->id
& 0xffffffff,
2110 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
2111 (int) rel
->r_addend
& 0xffffffff);
2117 /* Look up an entry in the stub hash. Stub entries are cached because
2118 creating the stub name takes a bit of time. */
2119 static struct elf32_nios2_stub_hash_entry
*
2120 nios2_get_stub_entry (const asection
*input_section
,
2121 const asection
*sym_sec
,
2122 struct elf32_nios2_link_hash_entry
*hh
,
2123 const Elf_Internal_Rela
*rel
,
2124 struct elf32_nios2_link_hash_table
*htab
,
2125 enum elf32_nios2_stub_type stub_type
)
2127 struct elf32_nios2_stub_hash_entry
*hsh
;
2128 const asection
*id_sec
;
2130 /* If this input section is part of a group of sections sharing one
2131 stub section, then use the id of the first/last section in the group,
2132 depending on the stub section placement relative to the group.
2133 Stub names need to include a section id, as there may well be
2134 more than one stub used to reach say, printf, and we need to
2135 distinguish between them. */
2136 if (stub_type
== nios2_stub_call26_before
)
2137 id_sec
= htab
->stub_group
[input_section
->id
].first_sec
;
2139 id_sec
= htab
->stub_group
[input_section
->id
].last_sec
;
2141 if (hh
!= NULL
&& hh
->hsh_cache
!= NULL
2142 && hh
->hsh_cache
->hh
== hh
2143 && hh
->hsh_cache
->id_sec
== id_sec
2144 && hh
->hsh_cache
->stub_type
== stub_type
)
2146 hsh
= hh
->hsh_cache
;
2152 stub_name
= nios2_stub_name (id_sec
, sym_sec
, hh
, rel
, stub_type
);
2153 if (stub_name
== NULL
)
2156 hsh
= nios2_stub_hash_lookup (&htab
->bstab
,
2157 stub_name
, FALSE
, FALSE
);
2160 hh
->hsh_cache
= hsh
;
2168 /* Add a new stub entry to the stub hash. Not all fields of the new
2169 stub entry are initialised. */
2170 static struct elf32_nios2_stub_hash_entry
*
2171 nios2_add_stub (const char *stub_name
,
2173 struct elf32_nios2_link_hash_table
*htab
,
2174 enum elf32_nios2_stub_type stub_type
)
2178 asection
**secptr
, **linkptr
;
2179 struct elf32_nios2_stub_hash_entry
*hsh
;
2182 if (stub_type
== nios2_stub_call26_before
)
2184 link_sec
= htab
->stub_group
[section
->id
].first_sec
;
2185 secptr
= &(htab
->stub_group
[section
->id
].first_stub_sec
);
2186 linkptr
= &(htab
->stub_group
[link_sec
->id
].first_stub_sec
);
2191 link_sec
= htab
->stub_group
[section
->id
].last_sec
;
2192 secptr
= &(htab
->stub_group
[section
->id
].last_stub_sec
);
2193 linkptr
= &(htab
->stub_group
[link_sec
->id
].last_stub_sec
);
2197 if (stub_sec
== NULL
)
2199 stub_sec
= *linkptr
;
2200 if (stub_sec
== NULL
)
2206 namelen
= strlen (link_sec
->name
);
2207 len
= namelen
+ sizeof (STUB_SUFFIX
);
2208 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
2212 memcpy (s_name
, link_sec
->name
, namelen
);
2213 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
2215 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
, afterp
);
2216 if (stub_sec
== NULL
)
2218 *linkptr
= stub_sec
;
2223 /* Enter this entry into the linker stub hash table. */
2224 hsh
= nios2_stub_hash_lookup (&htab
->bstab
, stub_name
,
2228 _bfd_error_handler (_("%B: cannot create stub entry %s"),
2234 hsh
->stub_sec
= stub_sec
;
2235 hsh
->stub_offset
= 0;
2236 hsh
->id_sec
= link_sec
;
2240 /* Set up various things so that we can make a list of input sections
2241 for each output section included in the link. Returns -1 on error,
2242 0 when no stubs will be needed, and 1 on success. */
2244 nios2_elf32_setup_section_lists (bfd
*output_bfd
, struct bfd_link_info
*info
)
2247 unsigned int bfd_count
;
2248 unsigned int top_id
, top_index
;
2250 asection
**input_list
, **list
;
2252 struct elf32_nios2_link_hash_table
*htab
= elf32_nios2_hash_table (info
);
2254 /* Count the number of input BFDs and find the top input section id. */
2255 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
2257 input_bfd
= input_bfd
->link
.next
)
2260 for (section
= input_bfd
->sections
;
2262 section
= section
->next
)
2264 if (top_id
< section
->id
)
2265 top_id
= section
->id
;
2269 htab
->bfd_count
= bfd_count
;
2271 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
2272 htab
->stub_group
= bfd_zmalloc (amt
);
2273 if (htab
->stub_group
== NULL
)
2276 /* We can't use output_bfd->section_count here to find the top output
2277 section index as some sections may have been removed, and
2278 strip_excluded_output_sections doesn't renumber the indices. */
2279 for (section
= output_bfd
->sections
, top_index
= 0;
2281 section
= section
->next
)
2283 if (top_index
< section
->index
)
2284 top_index
= section
->index
;
2287 htab
->top_index
= top_index
;
2288 amt
= sizeof (asection
*) * (top_index
+ 1);
2289 input_list
= bfd_malloc (amt
);
2290 htab
->input_list
= input_list
;
2291 if (input_list
== NULL
)
2294 /* For sections we aren't interested in, mark their entries with a
2295 value we can check later. */
2296 list
= input_list
+ top_index
;
2298 *list
= bfd_abs_section_ptr
;
2299 while (list
-- != input_list
);
2301 for (section
= output_bfd
->sections
;
2303 section
= section
->next
)
2305 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
2306 * have PC relative relocs in them but no code flag set. */
2307 if (((section
->flags
& SEC_CODE
) != 0) ||
2308 strcmp(".ctors", section
->name
) ||
2309 strcmp(".dtors", section
->name
))
2310 input_list
[section
->index
] = NULL
;
2316 /* The linker repeatedly calls this function for each input section,
2317 in the order that input sections are linked into output sections.
2318 Build lists of input sections to determine groupings between which
2319 we may insert linker stubs. */
2321 nios2_elf32_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
2323 struct elf32_nios2_link_hash_table
*htab
= elf32_nios2_hash_table (info
);
2325 if (isec
->output_section
->index
<= htab
->top_index
)
2327 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
2328 if (*list
!= bfd_abs_section_ptr
)
2330 /* Steal the last_sec pointer for our list.
2331 This happens to make the list in reverse order,
2332 which is what we want. */
2333 htab
->stub_group
[isec
->id
].last_sec
= *list
;
2339 /* Segment mask for CALL26 relocation relaxation. */
2340 #define CALL26_SEGMENT(x) ((x) & 0xf0000000)
2342 /* Fudge factor for approximate maximum size of all stubs that might
2343 be inserted by the linker. This does not actually limit the number
2344 of stubs that might be inserted, and only affects strategy for grouping
2345 and placement of stubs. Perhaps this should be computed based on number
2346 of relocations seen, or be specifiable on the command line. */
2347 #define MAX_STUB_SECTION_SIZE 0xffff
2349 /* See whether we can group stub sections together. Grouping stub
2350 sections may result in fewer stubs. More importantly, we need to
2351 put all .init* and .fini* stubs at the end of the .init or
2352 .fini output sections respectively, because glibc splits the
2353 _init and _fini functions into multiple parts. Putting a stub in
2354 the middle of a function is not a good idea.
2355 Rather than computing groups of a maximum fixed size, for Nios II
2356 CALL26 relaxation it makes more sense to compute the groups based on
2357 sections that fit within a 256MB address segment. Also do not allow
2358 a group to span more than one output section, since different output
2359 sections might correspond to different memory banks on a bare-metal
2362 group_sections (struct elf32_nios2_link_hash_table
*htab
)
2364 asection
**list
= htab
->input_list
+ htab
->top_index
;
2367 /* The list is in reverse order so we'll search backwards looking
2368 for the first section that begins in the same memory segment,
2369 marking sections along the way to point at the tail for this
2371 asection
*tail
= *list
;
2372 if (tail
== bfd_abs_section_ptr
)
2374 while (tail
!= NULL
)
2376 bfd_vma start
= tail
->output_section
->vma
+ tail
->output_offset
;
2377 bfd_vma end
= start
+ tail
->size
;
2378 bfd_vma segment
= CALL26_SEGMENT (end
);
2381 if (segment
!= CALL26_SEGMENT (start
)
2382 || segment
!= CALL26_SEGMENT (end
+ MAX_STUB_SECTION_SIZE
))
2383 /* This section spans more than one memory segment, or is
2384 close enough to the end of the segment that adding stub
2385 sections before it might cause it to move so that it
2386 spans memory segments, or that stubs added at the end of
2387 this group might overflow into the next memory segment.
2388 Put it in a group by itself to localize the effects. */
2390 prev
= htab
->stub_group
[tail
->id
].last_sec
;
2391 htab
->stub_group
[tail
->id
].last_sec
= tail
;
2392 htab
->stub_group
[tail
->id
].first_sec
= tail
;
2395 /* Collect more sections for this group. */
2397 asection
*curr
, *first
;
2398 for (curr
= tail
; ; curr
= prev
)
2400 prev
= htab
->stub_group
[curr
->id
].last_sec
;
2402 || tail
->output_section
!= prev
->output_section
2403 || (CALL26_SEGMENT (prev
->output_section
->vma
2404 + prev
->output_offset
)
2409 for (curr
= tail
; ; curr
= prev
)
2411 prev
= htab
->stub_group
[curr
->id
].last_sec
;
2412 htab
->stub_group
[curr
->id
].last_sec
= tail
;
2413 htab
->stub_group
[curr
->id
].first_sec
= first
;
2419 /* Reset tail for the next group. */
2423 while (list
-- != htab
->input_list
);
2424 free (htab
->input_list
);
2427 /* Determine the type of stub needed, if any, for a call. */
2428 static enum elf32_nios2_stub_type
2429 nios2_type_of_stub (asection
*input_sec
,
2430 const Elf_Internal_Rela
*rel
,
2431 struct elf32_nios2_link_hash_entry
*hh
,
2432 struct elf32_nios2_link_hash_table
*htab
,
2433 bfd_vma destination
,
2434 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
2436 bfd_vma location
, segment
, start
, end
;
2437 asection
*s0
, *s1
, *s
;
2440 !(hh
->root
.root
.type
== bfd_link_hash_defined
2441 || hh
->root
.root
.type
== bfd_link_hash_defweak
))
2442 return nios2_stub_none
;
2444 /* Determine where the call point is. */
2445 location
= (input_sec
->output_section
->vma
2446 + input_sec
->output_offset
+ rel
->r_offset
);
2447 segment
= CALL26_SEGMENT (location
);
2449 /* Nios II CALL and JMPI instructions can transfer control to addresses
2450 within the same 256MB segment as the PC. */
2451 if (segment
== CALL26_SEGMENT (destination
))
2452 return nios2_stub_none
;
2454 /* Find the start and end addresses of the stub group. Also account for
2455 any already-created stub sections for this group. Note that for stubs
2456 in the end section, only the first instruction of the last stub
2457 (12 bytes long) needs to be within range. */
2458 s0
= htab
->stub_group
[input_sec
->id
].first_sec
;
2459 s
= htab
->stub_group
[s0
->id
].first_stub_sec
;
2460 if (s
!= NULL
&& s
->size
> 0)
2461 start
= s
->output_section
->vma
+ s
->output_offset
;
2463 start
= s0
->output_section
->vma
+ s0
->output_offset
;
2465 s1
= htab
->stub_group
[input_sec
->id
].last_sec
;
2466 s
= htab
->stub_group
[s1
->id
].last_stub_sec
;
2467 if (s
!= NULL
&& s
->size
> 0)
2468 end
= s
->output_section
->vma
+ s
->output_offset
+ s
->size
- 8;
2470 end
= s1
->output_section
->vma
+ s1
->output_offset
+ s1
->size
;
2472 BFD_ASSERT (start
< end
);
2473 BFD_ASSERT (start
<= location
);
2474 BFD_ASSERT (location
< end
);
2476 /* Put stubs at the end of the group unless that is not a valid
2477 location and the beginning of the group is. It might be that
2478 neither the beginning nor end works if we have an input section
2479 so large that it spans multiple segment boundaries. In that
2480 case, punt; the end result will be a relocation overflow error no
2481 matter what we do here.
2483 Note that adding stubs pushes up the addresses of all subsequent
2484 sections, so that stubs allocated on one pass through the
2485 relaxation loop may not be valid on the next pass. (E.g., we may
2486 allocate a stub at the beginning of the section on one pass and
2487 find that the call site has been bumped into the next memory
2488 segment on the next pass.) The important thing to note is that
2489 we never try to reclaim the space allocated to such unused stubs,
2490 so code size and section addresses can only increase with each
2491 iteration. Accounting for the start and end addresses of the
2492 already-created stub sections ensures that when the algorithm
2493 converges, it converges accurately, with the entire appropriate
2494 stub section accessible from the call site and not just the
2495 address at the start or end of the stub group proper. */
2497 if (segment
== CALL26_SEGMENT (end
))
2498 return nios2_stub_call26_after
;
2499 else if (segment
== CALL26_SEGMENT (start
))
2500 return nios2_stub_call26_before
;
2502 /* Perhaps this should be a dedicated error code. */
2503 return nios2_stub_none
;
2507 nios2_build_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
2509 struct elf32_nios2_stub_hash_entry
*hsh
2510 = (struct elf32_nios2_stub_hash_entry
*) gen_entry
;
2511 asection
*stub_sec
= hsh
->stub_sec
;
2514 /* Make a note of the offset within the stubs for this entry. */
2515 hsh
->stub_offset
= stub_sec
->size
;
2517 switch (hsh
->stub_type
)
2519 case nios2_stub_call26_before
:
2520 case nios2_stub_call26_after
:
2521 /* A call26 stub looks like:
2522 orhi at, %hiadj(dest)
2523 addi at, at, %lo(dest)
2525 Note that call/jmpi instructions can't be used in PIC code
2526 so there is no reason for the stub to be PIC, either. */
2527 sym_value
= (hsh
->target_value
2528 + hsh
->target_section
->output_offset
2529 + hsh
->target_section
->output_section
->vma
2532 nios2_elf32_install_data (stub_sec
, nios2_call26_stub_entry
,
2533 hsh
->stub_offset
, 3);
2534 nios2_elf32_install_imm16 (stub_sec
, hsh
->stub_offset
,
2536 nios2_elf32_install_imm16 (stub_sec
, hsh
->stub_offset
+ 4,
2537 (sym_value
& 0xffff));
2538 stub_sec
->size
+= 12;
2548 /* As above, but don't actually build the stub. Just bump offset so
2549 we know stub section sizes. */
2551 nios2_size_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
2553 struct elf32_nios2_stub_hash_entry
*hsh
2554 = (struct elf32_nios2_stub_hash_entry
*) gen_entry
;
2556 switch (hsh
->stub_type
)
2558 case nios2_stub_call26_before
:
2559 case nios2_stub_call26_after
:
2560 hsh
->stub_sec
->size
+= 12;
2569 /* Read in all local syms for all input bfds.
2570 Returns -1 on error, 0 otherwise. */
2573 get_local_syms (bfd
*output_bfd ATTRIBUTE_UNUSED
, bfd
*input_bfd
,
2574 struct bfd_link_info
*info
)
2576 unsigned int bfd_indx
;
2577 Elf_Internal_Sym
*local_syms
, **all_local_syms
;
2578 struct elf32_nios2_link_hash_table
*htab
= elf32_nios2_hash_table (info
);
2580 /* We want to read in symbol extension records only once. To do this
2581 we need to read in the local symbols in parallel and save them for
2582 later use; so hold pointers to the local symbols in an array. */
2583 bfd_size_type amt
= sizeof (Elf_Internal_Sym
*) * htab
->bfd_count
;
2584 all_local_syms
= bfd_zmalloc (amt
);
2585 htab
->all_local_syms
= all_local_syms
;
2586 if (all_local_syms
== NULL
)
2589 /* Walk over all the input BFDs, swapping in local symbols. */
2592 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
2594 Elf_Internal_Shdr
*symtab_hdr
;
2596 /* We'll need the symbol table in a second. */
2597 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2598 if (symtab_hdr
->sh_info
== 0)
2601 /* We need an array of the local symbols attached to the input bfd. */
2602 local_syms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
2603 if (local_syms
== NULL
)
2605 local_syms
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
2606 symtab_hdr
->sh_info
, 0,
2608 /* Cache them for elf_link_input_bfd. */
2609 symtab_hdr
->contents
= (unsigned char *) local_syms
;
2611 if (local_syms
== NULL
)
2614 all_local_syms
[bfd_indx
] = local_syms
;
2620 /* Determine and set the size of the stub section for a final link. */
2622 nios2_elf32_size_stubs (bfd
*output_bfd
, bfd
*stub_bfd
,
2623 struct bfd_link_info
*info
,
2624 asection
*(*add_stub_section
) (const char *,
2625 asection
*, bfd_boolean
),
2626 void (*layout_sections_again
) (void))
2628 bfd_boolean stub_changed
= FALSE
;
2629 struct elf32_nios2_link_hash_table
*htab
= elf32_nios2_hash_table (info
);
2631 /* Stash our params away. */
2632 htab
->stub_bfd
= stub_bfd
;
2633 htab
->add_stub_section
= add_stub_section
;
2634 htab
->layout_sections_again
= layout_sections_again
;
2636 /* FIXME: We only compute the section groups once. This could cause
2637 problems if adding a large stub section causes following sections,
2638 or parts of them, to move into another segment. However, this seems
2639 to be consistent with the way other back ends handle this.... */
2640 group_sections (htab
);
2642 if (get_local_syms (output_bfd
, info
->input_bfds
, info
))
2644 if (htab
->all_local_syms
)
2645 goto error_ret_free_local
;
2652 unsigned int bfd_indx
;
2655 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
2657 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
2659 Elf_Internal_Shdr
*symtab_hdr
;
2661 Elf_Internal_Sym
*local_syms
;
2663 /* We'll need the symbol table in a second. */
2664 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2665 if (symtab_hdr
->sh_info
== 0)
2668 local_syms
= htab
->all_local_syms
[bfd_indx
];
2670 /* Walk over each section attached to the input bfd. */
2671 for (section
= input_bfd
->sections
;
2673 section
= section
->next
)
2675 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
2677 /* If there aren't any relocs, then there's nothing more
2679 if ((section
->flags
& SEC_RELOC
) == 0
2680 || section
->reloc_count
== 0)
2683 /* If this section is a link-once section that will be
2684 discarded, then don't create any stubs. */
2685 if (section
->output_section
== NULL
2686 || section
->output_section
->owner
!= output_bfd
)
2689 /* Get the relocs. */
2691 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
, NULL
,
2693 if (internal_relocs
== NULL
)
2694 goto error_ret_free_local
;
2696 /* Now examine each relocation. */
2697 irela
= internal_relocs
;
2698 irelaend
= irela
+ section
->reloc_count
;
2699 for (; irela
< irelaend
; irela
++)
2701 unsigned int r_type
, r_indx
;
2702 enum elf32_nios2_stub_type stub_type
;
2703 struct elf32_nios2_stub_hash_entry
*hsh
;
2706 bfd_vma destination
;
2707 struct elf32_nios2_link_hash_entry
*hh
;
2709 const asection
*id_sec
;
2711 r_type
= ELF32_R_TYPE (irela
->r_info
);
2712 r_indx
= ELF32_R_SYM (irela
->r_info
);
2714 if (r_type
>= (unsigned int) R_NIOS2_ILLEGAL
)
2716 bfd_set_error (bfd_error_bad_value
);
2717 error_ret_free_internal
:
2718 if (elf_section_data (section
)->relocs
== NULL
)
2719 free (internal_relocs
);
2720 goto error_ret_free_local
;
2723 /* Only look for stubs on CALL and JMPI instructions. */
2724 if (r_type
!= (unsigned int) R_NIOS2_CALL26
)
2727 /* Now determine the call target, its name, value,
2733 if (r_indx
< symtab_hdr
->sh_info
)
2735 /* It's a local symbol. */
2736 Elf_Internal_Sym
*sym
;
2737 Elf_Internal_Shdr
*hdr
;
2740 sym
= local_syms
+ r_indx
;
2741 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
2742 sym_value
= sym
->st_value
;
2743 shndx
= sym
->st_shndx
;
2744 if (shndx
< elf_numsections (input_bfd
))
2746 hdr
= elf_elfsections (input_bfd
)[shndx
];
2747 sym_sec
= hdr
->bfd_section
;
2748 destination
= (sym_value
+ irela
->r_addend
2749 + sym_sec
->output_offset
2750 + sym_sec
->output_section
->vma
);
2755 /* It's an external symbol. */
2758 e_indx
= r_indx
- symtab_hdr
->sh_info
;
2759 hh
= ((struct elf32_nios2_link_hash_entry
*)
2760 elf_sym_hashes (input_bfd
)[e_indx
]);
2762 while (hh
->root
.root
.type
== bfd_link_hash_indirect
2763 || hh
->root
.root
.type
== bfd_link_hash_warning
)
2764 hh
= ((struct elf32_nios2_link_hash_entry
*)
2765 hh
->root
.root
.u
.i
.link
);
2767 if (hh
->root
.root
.type
== bfd_link_hash_defined
2768 || hh
->root
.root
.type
== bfd_link_hash_defweak
)
2770 sym_sec
= hh
->root
.root
.u
.def
.section
;
2771 sym_value
= hh
->root
.root
.u
.def
.value
;
2773 if (sym_sec
->output_section
!= NULL
)
2774 destination
= (sym_value
+ irela
->r_addend
2775 + sym_sec
->output_offset
2776 + sym_sec
->output_section
->vma
);
2780 else if (hh
->root
.root
.type
== bfd_link_hash_undefweak
)
2782 if (! bfd_link_pic (info
))
2785 else if (hh
->root
.root
.type
== bfd_link_hash_undefined
)
2787 if (! (info
->unresolved_syms_in_objects
== RM_IGNORE
2788 && (ELF_ST_VISIBILITY (hh
->root
.other
)
2794 bfd_set_error (bfd_error_bad_value
);
2795 goto error_ret_free_internal
;
2799 /* Determine what (if any) linker stub is needed. */
2800 stub_type
= nios2_type_of_stub (section
, irela
, hh
, htab
,
2802 if (stub_type
== nios2_stub_none
)
2805 /* Support for grouping stub sections. */
2806 if (stub_type
== nios2_stub_call26_before
)
2807 id_sec
= htab
->stub_group
[section
->id
].first_sec
;
2809 id_sec
= htab
->stub_group
[section
->id
].last_sec
;
2811 /* Get the name of this stub. */
2812 stub_name
= nios2_stub_name (id_sec
, sym_sec
, hh
, irela
,
2815 goto error_ret_free_internal
;
2817 hsh
= nios2_stub_hash_lookup (&htab
->bstab
,
2822 /* The proper stub has already been created. */
2827 hsh
= nios2_add_stub (stub_name
, section
, htab
, stub_type
);
2831 goto error_ret_free_internal
;
2833 hsh
->target_value
= sym_value
;
2834 hsh
->target_section
= sym_sec
;
2835 hsh
->stub_type
= stub_type
;
2837 hsh
->addend
= irela
->r_addend
;
2838 stub_changed
= TRUE
;
2841 /* We're done with the internal relocs, free them. */
2842 if (elf_section_data (section
)->relocs
== NULL
)
2843 free (internal_relocs
);
2850 /* OK, we've added some stubs. Find out the new size of the
2852 for (stub_sec
= htab
->stub_bfd
->sections
;
2854 stub_sec
= stub_sec
->next
)
2857 bfd_hash_traverse (&htab
->bstab
, nios2_size_one_stub
, htab
);
2859 /* Ask the linker to do its stuff. */
2860 (*htab
->layout_sections_again
) ();
2861 stub_changed
= FALSE
;
2864 free (htab
->all_local_syms
);
2867 error_ret_free_local
:
2868 free (htab
->all_local_syms
);
2872 /* Build all the stubs associated with the current output file. The
2873 stubs are kept in a hash table attached to the main linker hash
2874 table. This function is called via nios2elf_finish in the linker. */
2876 nios2_elf32_build_stubs (struct bfd_link_info
*info
)
2879 struct bfd_hash_table
*table
;
2880 struct elf32_nios2_link_hash_table
*htab
;
2882 htab
= elf32_nios2_hash_table (info
);
2884 for (stub_sec
= htab
->stub_bfd
->sections
;
2886 stub_sec
= stub_sec
->next
)
2887 /* The stub_bfd may contain non-stub sections if it is also the
2888 dynobj. Any such non-stub sections are created with the
2889 SEC_LINKER_CREATED flag set, while stub sections do not
2890 have that flag. Ignore any non-stub sections here. */
2891 if ((stub_sec
->flags
& SEC_LINKER_CREATED
) == 0)
2895 /* Allocate memory to hold the linker stubs. */
2896 size
= stub_sec
->size
;
2897 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
2898 if (stub_sec
->contents
== NULL
&& size
!= 0)
2903 /* Build the stubs as directed by the stub hash table. */
2904 table
= &htab
->bstab
;
2905 bfd_hash_traverse (table
, nios2_build_one_stub
, info
);
2911 #define is_nios2_elf(bfd) \
2912 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2913 && elf_object_id (bfd) == NIOS2_ELF_DATA)
2915 /* Merge backend specific data from an object file to the output
2916 object file when linking. */
2919 nios2_elf32_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
2921 bfd
*obfd
= info
->output_bfd
;
2925 if (!is_nios2_elf (ibfd
) || !is_nios2_elf (obfd
))
2928 /* Check if we have the same endianness. */
2929 if (! _bfd_generic_verify_endian_match (ibfd
, info
))
2932 new_flags
= elf_elfheader (ibfd
)->e_flags
;
2933 old_flags
= elf_elfheader (obfd
)->e_flags
;
2934 if (!elf_flags_init (obfd
))
2936 /* First call, no flags set. */
2937 elf_flags_init (obfd
) = TRUE
;
2938 elf_elfheader (obfd
)->e_flags
= new_flags
;
2943 case EF_NIOS2_ARCH_R1
:
2944 bfd_default_set_arch_mach (obfd
, bfd_arch_nios2
, bfd_mach_nios2r1
);
2946 case EF_NIOS2_ARCH_R2
:
2947 if (bfd_big_endian (ibfd
))
2950 (_("error: %B: Big-endian R2 is not supported."), ibfd
);
2951 bfd_set_error (bfd_error_bad_value
);
2954 bfd_default_set_arch_mach (obfd
, bfd_arch_nios2
, bfd_mach_nios2r2
);
2959 /* Incompatible flags. */
2960 else if (new_flags
!= old_flags
)
2962 /* So far, the only incompatible flags denote incompatible
2965 (_("error: %B: Conflicting CPU architectures %d/%d"),
2966 ibfd
, new_flags
, old_flags
);
2967 bfd_set_error (bfd_error_bad_value
);
2971 /* Merge Tag_compatibility attributes and any common GNU ones. */
2972 _bfd_elf_merge_object_attributes (ibfd
, info
);
2978 /* Implement bfd_elf32_bfd_reloc_type_lookup:
2979 Given a BFD reloc type, return a howto structure. */
2980 static reloc_howto_type
*
2981 nios2_elf32_bfd_reloc_type_lookup (bfd
*abfd
,
2982 bfd_reloc_code_real_type code
)
2987 i
< (int) (sizeof (nios2_reloc_map
) / sizeof (struct elf_reloc_map
));
2989 if (nios2_reloc_map
[i
].bfd_val
== code
)
2990 return lookup_howto (nios2_reloc_map
[i
].elf_val
, abfd
);
2994 /* Implement bfd_elf32_bfd_reloc_name_lookup:
2995 Given a reloc name, return a howto structure. */
2996 static reloc_howto_type
*
2997 nios2_elf32_bfd_reloc_name_lookup (bfd
*abfd
,
3001 reloc_howto_type
*howto_tbl
;
3004 if (BFD_IS_R2 (abfd
))
3006 howto_tbl
= elf_nios2_r2_howto_table_rel
;
3007 howto_tbl_size
= (int) (sizeof (elf_nios2_r2_howto_table_rel
)
3008 / sizeof (elf_nios2_r2_howto_table_rel
[0]));
3012 howto_tbl
= elf_nios2_r1_howto_table_rel
;
3013 howto_tbl_size
= (int) (sizeof (elf_nios2_r1_howto_table_rel
)
3014 / sizeof (elf_nios2_r1_howto_table_rel
[0]));
3017 for (i
= 0; i
< howto_tbl_size
; i
++)
3018 if (howto_tbl
[i
].name
&& strcasecmp (howto_tbl
[i
].name
, r_name
) == 0)
3019 return howto_tbl
+ i
;
3023 /* Implement elf_info_to_howto:
3024 Given a ELF32 relocation, fill in a arelent structure. */
3026 nios2_elf32_info_to_howto (bfd
*abfd
, arelent
*cache_ptr
,
3027 Elf_Internal_Rela
*dst
)
3029 unsigned int r_type
;
3031 r_type
= ELF32_R_TYPE (dst
->r_info
);
3032 cache_ptr
->howto
= lookup_howto (r_type
, abfd
);
3035 /* Return the base VMA address which should be subtracted from real addresses
3036 when resolving @dtpoff relocation.
3037 This is PT_TLS segment p_vaddr. */
3039 dtpoff_base (struct bfd_link_info
*info
)
3041 /* If tls_sec is NULL, we should have signalled an error already. */
3042 if (elf_hash_table (info
)->tls_sec
== NULL
)
3044 return elf_hash_table (info
)->tls_sec
->vma
;
3047 /* Return the relocation value for @tpoff relocation
3048 if STT_TLS virtual address is ADDRESS. */
3050 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3052 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3054 /* If tls_sec is NULL, we should have signalled an error already. */
3055 if (htab
->tls_sec
== NULL
)
3057 return address
- htab
->tls_sec
->vma
;
3060 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
3061 dangerous relocation. */
3063 nios2_elf_assign_gp (bfd
*output_bfd
, bfd_vma
*pgp
, struct bfd_link_info
*info
)
3066 bfd_boolean gp_found
;
3067 struct bfd_hash_entry
*h
;
3068 struct bfd_link_hash_entry
*lh
;
3070 /* If we've already figured out what GP will be, just return it. */
3071 *pgp
= _bfd_get_gp_value (output_bfd
);
3075 h
= bfd_hash_lookup (&info
->hash
->table
, "_gp", FALSE
, FALSE
);
3076 lh
= (struct bfd_link_hash_entry
*) h
;
3082 case bfd_link_hash_undefined
:
3083 case bfd_link_hash_undefweak
:
3084 case bfd_link_hash_common
:
3087 case bfd_link_hash_defined
:
3088 case bfd_link_hash_defweak
:
3091 asection
*sym_sec
= lh
->u
.def
.section
;
3092 bfd_vma sym_value
= lh
->u
.def
.value
;
3094 if (sym_sec
->output_section
)
3095 sym_value
= (sym_value
+ sym_sec
->output_offset
3096 + sym_sec
->output_section
->vma
);
3100 case bfd_link_hash_indirect
:
3101 case bfd_link_hash_warning
:
3103 /* @@FIXME ignoring warning for now */
3105 case bfd_link_hash_new
:
3115 /* Only get the error once. */
3117 _bfd_set_gp_value (output_bfd
, *pgp
);
3121 _bfd_set_gp_value (output_bfd
, *pgp
);
3126 /* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous
3127 if it's not available as we don't have a link_info pointer available here
3128 to look it up in the output symbol table. We don't need to adjust the
3129 symbol value for an external symbol if we are producing relocatable
3131 static bfd_reloc_status_type
3132 nios2_elf_final_gp (bfd
*output_bfd
, asymbol
*symbol
, bfd_boolean relocatable
,
3133 char **error_message
, bfd_vma
*pgp
)
3135 if (bfd_is_und_section (symbol
->section
) && !relocatable
)
3138 return bfd_reloc_undefined
;
3141 *pgp
= _bfd_get_gp_value (output_bfd
);
3142 if (*pgp
== 0 && (!relocatable
|| (symbol
->flags
& BSF_SECTION_SYM
) != 0))
3146 /* Make up a value. */
3147 *pgp
= symbol
->section
->output_section
->vma
+ 0x4000;
3148 _bfd_set_gp_value (output_bfd
, *pgp
);
3153 = (char *) _("global pointer relative relocation when _gp not defined");
3154 return bfd_reloc_dangerous
;
3158 return bfd_reloc_ok
;
3161 /* Do the relocations that require special handling. */
3162 static bfd_reloc_status_type
3163 nios2_elf32_do_hi16_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3164 asection
*input_section
,
3165 bfd_byte
*data
, bfd_vma offset
,
3166 bfd_vma symbol_value
, bfd_vma addend
)
3168 symbol_value
= symbol_value
+ addend
;
3170 symbol_value
= (symbol_value
>> 16) & 0xffff;
3171 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
3172 data
, offset
, symbol_value
, addend
);
3175 static bfd_reloc_status_type
3176 nios2_elf32_do_lo16_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3177 asection
*input_section
,
3178 bfd_byte
*data
, bfd_vma offset
,
3179 bfd_vma symbol_value
, bfd_vma addend
)
3181 symbol_value
= symbol_value
+ addend
;
3183 symbol_value
= symbol_value
& 0xffff;
3184 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
3185 data
, offset
, symbol_value
, addend
);
3188 static bfd_reloc_status_type
3189 nios2_elf32_do_hiadj16_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3190 asection
*input_section
,
3191 bfd_byte
*data
, bfd_vma offset
,
3192 bfd_vma symbol_value
, bfd_vma addend
)
3194 symbol_value
= symbol_value
+ addend
;
3196 symbol_value
= hiadj(symbol_value
);
3197 return _bfd_final_link_relocate (howto
, abfd
, input_section
, data
, offset
,
3198 symbol_value
, addend
);
3201 static bfd_reloc_status_type
3202 nios2_elf32_do_pcrel_lo16_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3203 asection
*input_section
,
3204 bfd_byte
*data
, bfd_vma offset
,
3205 bfd_vma symbol_value
, bfd_vma addend
)
3207 symbol_value
= symbol_value
+ addend
;
3209 symbol_value
= symbol_value
& 0xffff;
3210 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
3211 data
, offset
, symbol_value
, addend
);
3214 static bfd_reloc_status_type
3215 nios2_elf32_do_pcrel_hiadj16_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3216 asection
*input_section
,
3217 bfd_byte
*data
, bfd_vma offset
,
3218 bfd_vma symbol_value
, bfd_vma addend
)
3220 symbol_value
= symbol_value
+ addend
;
3221 symbol_value
-= (input_section
->output_section
->vma
3222 + input_section
->output_offset
);
3223 symbol_value
-= offset
;
3225 symbol_value
= hiadj(symbol_value
);
3226 return _bfd_final_link_relocate (howto
, abfd
, input_section
, data
, offset
,
3227 symbol_value
, addend
);
3230 static bfd_reloc_status_type
3231 nios2_elf32_do_pcrel16_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3232 asection
*input_section
,
3233 bfd_byte
*data
, bfd_vma offset
,
3234 bfd_vma symbol_value
, bfd_vma addend
)
3236 /* NIOS2 pc relative relocations are relative to the next 32-bit instruction
3237 so we need to subtract 4 before doing a final_link_relocate. */
3238 symbol_value
= symbol_value
+ addend
- 4;
3240 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
3241 data
, offset
, symbol_value
, addend
);
3244 static bfd_reloc_status_type
3245 nios2_elf32_do_call26_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3246 asection
*input_section
,
3247 bfd_byte
*data
, bfd_vma offset
,
3248 bfd_vma symbol_value
, bfd_vma addend
)
3250 /* Check that the relocation is in the same page as the current address. */
3251 if (CALL26_SEGMENT (symbol_value
+ addend
)
3252 != CALL26_SEGMENT (input_section
->output_section
->vma
3253 + input_section
->output_offset
3255 return bfd_reloc_overflow
;
3257 /* Check that the target address is correctly aligned on a 4-byte
3259 if ((symbol_value
+ addend
) & 0x3)
3260 return bfd_reloc_overflow
;
3262 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
3263 data
, offset
, symbol_value
, addend
);
3266 static bfd_reloc_status_type
3267 nios2_elf32_do_gprel_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3268 asection
*input_section
,
3269 bfd_byte
*data
, bfd_vma offset
,
3270 bfd_vma symbol_value
, bfd_vma addend
)
3272 /* Because we need the output_bfd, the special handling is done
3273 in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */
3274 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
3275 data
, offset
, symbol_value
, addend
);
3278 static bfd_reloc_status_type
3279 nios2_elf32_do_ujmp_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3280 asection
*input_section
,
3281 bfd_byte
*data
, bfd_vma offset
,
3282 bfd_vma symbol_value
, bfd_vma addend
)
3284 bfd_vma symbol_lo16
, symbol_hi16
;
3285 bfd_reloc_status_type r
;
3286 symbol_value
= symbol_value
+ addend
;
3288 symbol_hi16
= (symbol_value
>> 16) & 0xffff;
3289 symbol_lo16
= symbol_value
& 0xffff;
3291 r
= _bfd_final_link_relocate (howto
, abfd
, input_section
,
3292 data
, offset
, symbol_hi16
, addend
);
3294 if (r
== bfd_reloc_ok
)
3295 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
3296 data
, offset
+ 4, symbol_lo16
, addend
);
3301 static bfd_reloc_status_type
3302 nios2_elf32_do_cjmp_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3303 asection
*input_section
,
3304 bfd_byte
*data
, bfd_vma offset
,
3305 bfd_vma symbol_value
, bfd_vma addend
)
3307 bfd_vma symbol_lo16
, symbol_hi16
;
3308 bfd_reloc_status_type r
;
3309 symbol_value
= symbol_value
+ addend
;
3311 symbol_hi16
= (symbol_value
>> 16) & 0xffff;
3312 symbol_lo16
= symbol_value
& 0xffff;
3314 r
= _bfd_final_link_relocate (howto
, abfd
, input_section
,
3315 data
, offset
, symbol_hi16
, addend
);
3317 if (r
== bfd_reloc_ok
)
3318 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
3319 data
, offset
+ 4, symbol_lo16
, addend
);
3324 static bfd_reloc_status_type
3325 nios2_elf32_do_callr_relocate (bfd
*abfd
, reloc_howto_type
*howto
,
3326 asection
*input_section
,
3327 bfd_byte
*data
, bfd_vma offset
,
3328 bfd_vma symbol_value
, bfd_vma addend
)
3330 bfd_vma symbol_lo16
, symbol_hi16
;
3331 bfd_reloc_status_type r
;
3332 symbol_value
= symbol_value
+ addend
;
3334 symbol_hi16
= (symbol_value
>> 16) & 0xffff;
3335 symbol_lo16
= symbol_value
& 0xffff;
3337 r
= _bfd_final_link_relocate (howto
, abfd
, input_section
,
3338 data
, offset
, symbol_hi16
, addend
);
3340 if (r
== bfd_reloc_ok
)
3341 return _bfd_final_link_relocate (howto
, abfd
, input_section
,
3342 data
, offset
+ 4, symbol_lo16
, addend
);
3347 /* HOWTO handlers for relocations that require special handling. */
3349 /* This is for relocations used only when relaxing to ensure
3350 changes in size of section don't screw up .align. */
3351 static bfd_reloc_status_type
3352 nios2_elf32_ignore_reloc (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*reloc_entry
,
3353 asymbol
*symbol ATTRIBUTE_UNUSED
,
3354 void *data ATTRIBUTE_UNUSED
, asection
*input_section
,
3356 char **error_message ATTRIBUTE_UNUSED
)
3358 if (output_bfd
!= NULL
)
3359 reloc_entry
->address
+= input_section
->output_offset
;
3360 return bfd_reloc_ok
;
3363 static bfd_reloc_status_type
3364 nios2_elf32_hi16_relocate (bfd
*abfd
, arelent
*reloc_entry
, asymbol
*symbol
,
3365 void *data
, asection
*input_section
,
3367 char **error_message ATTRIBUTE_UNUSED
)
3369 /* This part is from bfd_elf_generic_reloc. */
3370 if (output_bfd
!= NULL
3371 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3372 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3374 reloc_entry
->address
+= input_section
->output_offset
;
3375 return bfd_reloc_ok
;
3378 if (output_bfd
!= NULL
)
3379 /* FIXME: See bfd_perform_relocation. Is this right? */
3380 return bfd_reloc_continue
;
3382 return nios2_elf32_do_hi16_relocate (abfd
, reloc_entry
->howto
,
3384 data
, reloc_entry
->address
,
3386 + symbol
->section
->output_section
->vma
3387 + symbol
->section
->output_offset
),
3388 reloc_entry
->addend
);
3391 static bfd_reloc_status_type
3392 nios2_elf32_lo16_relocate (bfd
*abfd
, arelent
*reloc_entry
, asymbol
*symbol
,
3393 void *data
, asection
*input_section
,
3395 char **error_message ATTRIBUTE_UNUSED
)
3397 /* This part is from bfd_elf_generic_reloc. */
3398 if (output_bfd
!= NULL
3399 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3400 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3402 reloc_entry
->address
+= input_section
->output_offset
;
3403 return bfd_reloc_ok
;
3406 if (output_bfd
!= NULL
)
3407 /* FIXME: See bfd_perform_relocation. Is this right? */
3408 return bfd_reloc_continue
;
3410 return nios2_elf32_do_lo16_relocate (abfd
, reloc_entry
->howto
,
3412 data
, reloc_entry
->address
,
3414 + symbol
->section
->output_section
->vma
3415 + symbol
->section
->output_offset
),
3416 reloc_entry
->addend
);
3419 static bfd_reloc_status_type
3420 nios2_elf32_hiadj16_relocate (bfd
*abfd
, arelent
*reloc_entry
, asymbol
*symbol
,
3421 void *data
, asection
*input_section
,
3423 char **error_message ATTRIBUTE_UNUSED
)
3425 /* This part is from bfd_elf_generic_reloc. */
3426 if (output_bfd
!= NULL
3427 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3428 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3430 reloc_entry
->address
+= input_section
->output_offset
;
3431 return bfd_reloc_ok
;
3434 if (output_bfd
!= NULL
)
3435 /* FIXME: See bfd_perform_relocation. Is this right? */
3436 return bfd_reloc_continue
;
3438 return nios2_elf32_do_hiadj16_relocate (abfd
, reloc_entry
->howto
,
3440 data
, reloc_entry
->address
,
3442 + symbol
->section
->output_section
->vma
3443 + symbol
->section
->output_offset
),
3444 reloc_entry
->addend
);
3447 static bfd_reloc_status_type
3448 nios2_elf32_pcrel_lo16_relocate (bfd
*abfd
, arelent
*reloc_entry
,
3449 asymbol
*symbol
, void *data
,
3450 asection
*input_section
, bfd
*output_bfd
,
3451 char **error_message ATTRIBUTE_UNUSED
)
3453 /* This part is from bfd_elf_generic_reloc. */
3454 if (output_bfd
!= NULL
3455 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3456 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3458 reloc_entry
->address
+= input_section
->output_offset
;
3459 return bfd_reloc_ok
;
3462 if (output_bfd
!= NULL
)
3463 /* FIXME: See bfd_perform_relocation. Is this right? */
3464 return bfd_reloc_continue
;
3466 return nios2_elf32_do_pcrel_lo16_relocate (
3467 abfd
, reloc_entry
->howto
, input_section
, data
, reloc_entry
->address
,
3468 (symbol
->value
+ symbol
->section
->output_section
->vma
3469 + symbol
->section
->output_offset
),
3470 reloc_entry
->addend
);
3473 static bfd_reloc_status_type
3474 nios2_elf32_pcrel_hiadj16_relocate (bfd
*abfd
, arelent
*reloc_entry
,
3475 asymbol
*symbol
, void *data
,
3476 asection
*input_section
, bfd
*output_bfd
,
3477 char **error_message ATTRIBUTE_UNUSED
)
3479 /* This part is from bfd_elf_generic_reloc. */
3480 if (output_bfd
!= NULL
3481 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3482 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3484 reloc_entry
->address
+= input_section
->output_offset
;
3485 return bfd_reloc_ok
;
3488 if (output_bfd
!= NULL
)
3489 /* FIXME: See bfd_perform_relocation. Is this right? */
3490 return bfd_reloc_continue
;
3492 return nios2_elf32_do_pcrel_hiadj16_relocate (
3493 abfd
, reloc_entry
->howto
, input_section
, data
, reloc_entry
->address
,
3494 (symbol
->value
+ symbol
->section
->output_section
->vma
3495 + symbol
->section
->output_offset
),
3496 reloc_entry
->addend
);
3499 static bfd_reloc_status_type
3500 nios2_elf32_pcrel16_relocate (bfd
*abfd
, arelent
*reloc_entry
, asymbol
*symbol
,
3501 void *data
, asection
*input_section
,
3503 char **error_message ATTRIBUTE_UNUSED
)
3505 /* This part is from bfd_elf_generic_reloc. */
3506 if (output_bfd
!= NULL
3507 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3508 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3510 reloc_entry
->address
+= input_section
->output_offset
;
3511 return bfd_reloc_ok
;
3514 if (output_bfd
!= NULL
)
3515 /* FIXME: See bfd_perform_relocation. Is this right? */
3516 return bfd_reloc_continue
;
3518 return nios2_elf32_do_pcrel16_relocate (abfd
, reloc_entry
->howto
,
3520 data
, reloc_entry
->address
,
3522 + symbol
->section
->output_section
->vma
3523 + symbol
->section
->output_offset
),
3524 reloc_entry
->addend
);
3527 static bfd_reloc_status_type
3528 nios2_elf32_call26_relocate (bfd
*abfd
, arelent
*reloc_entry
, asymbol
*symbol
,
3529 void *data
, asection
*input_section
,
3531 char **error_message ATTRIBUTE_UNUSED
)
3533 /* This part is from bfd_elf_generic_reloc. */
3534 if (output_bfd
!= NULL
3535 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3536 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3538 reloc_entry
->address
+= input_section
->output_offset
;
3539 return bfd_reloc_ok
;
3542 if (output_bfd
!= NULL
)
3543 /* FIXME: See bfd_perform_relocation. Is this right? */
3544 return bfd_reloc_continue
;
3546 return nios2_elf32_do_call26_relocate (abfd
, reloc_entry
->howto
,
3548 data
, reloc_entry
->address
,
3550 + symbol
->section
->output_section
->vma
3551 + symbol
->section
->output_offset
),
3552 reloc_entry
->addend
);
3555 static bfd_reloc_status_type
3556 nios2_elf32_gprel_relocate (bfd
*abfd
, arelent
*reloc_entry
, asymbol
*symbol
,
3557 void *data
, asection
*input_section
,
3558 bfd
*output_bfd
, char **msg
)
3562 bfd_reloc_status_type r
;
3565 /* This part is from bfd_elf_generic_reloc. */
3566 if (output_bfd
!= NULL
3567 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3568 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3570 reloc_entry
->address
+= input_section
->output_offset
;
3571 return bfd_reloc_ok
;
3574 if (output_bfd
!= NULL
)
3575 /* FIXME: See bfd_perform_relocation. Is this right? */
3576 return bfd_reloc_continue
;
3578 relocation
= (symbol
->value
3579 + symbol
->section
->output_section
->vma
3580 + symbol
->section
->output_offset
);
3582 /* This assumes we've already cached the _gp symbol. */
3583 r
= nios2_elf_final_gp (abfd
, symbol
, FALSE
, msg
, &gp
);
3584 if (r
== bfd_reloc_ok
)
3586 relocation
= relocation
+ reloc_entry
->addend
- gp
;
3587 reloc_entry
->addend
= 0;
3588 if ((signed) relocation
< -32768 || (signed) relocation
> 32767)
3590 *msg
= _("global pointer relative address out of range");
3591 r
= bfd_reloc_outofrange
;
3594 r
= nios2_elf32_do_gprel_relocate (abfd
, reloc_entry
->howto
,
3596 data
, reloc_entry
->address
,
3597 relocation
, reloc_entry
->addend
);
3603 static bfd_reloc_status_type
3604 nios2_elf32_ujmp_relocate (bfd
*abfd
, arelent
*reloc_entry
, asymbol
*symbol
,
3605 void *data
, asection
*input_section
,
3606 bfd
*output_bfd
, char **msg ATTRIBUTE_UNUSED
)
3608 /* This part is from bfd_elf_generic_reloc. */
3609 if (output_bfd
!= NULL
3610 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3611 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3613 reloc_entry
->address
+= input_section
->output_offset
;
3614 return bfd_reloc_ok
;
3617 if (output_bfd
!= NULL
)
3618 /* FIXME: See bfd_perform_relocation. Is this right? */
3619 return bfd_reloc_continue
;
3621 return nios2_elf32_do_ujmp_relocate (abfd
, reloc_entry
->howto
,
3623 data
, reloc_entry
->address
,
3625 + symbol
->section
->output_section
->vma
3626 + symbol
->section
->output_offset
),
3627 reloc_entry
->addend
);
3630 static bfd_reloc_status_type
3631 nios2_elf32_cjmp_relocate (bfd
*abfd
, arelent
*reloc_entry
, asymbol
*symbol
,
3632 void *data
, asection
*input_section
,
3633 bfd
*output_bfd
, char **msg ATTRIBUTE_UNUSED
)
3635 /* This part is from bfd_elf_generic_reloc. */
3636 if (output_bfd
!= NULL
3637 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3638 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3640 reloc_entry
->address
+= input_section
->output_offset
;
3641 return bfd_reloc_ok
;
3644 if (output_bfd
!= NULL
)
3645 /* FIXME: See bfd_perform_relocation. Is this right? */
3646 return bfd_reloc_continue
;
3648 return nios2_elf32_do_cjmp_relocate (abfd
, reloc_entry
->howto
,
3650 data
, reloc_entry
->address
,
3652 + symbol
->section
->output_section
->vma
3653 + symbol
->section
->output_offset
),
3654 reloc_entry
->addend
);
3657 static bfd_reloc_status_type
3658 nios2_elf32_callr_relocate (bfd
*abfd
, arelent
*reloc_entry
, asymbol
*symbol
,
3659 void *data
, asection
*input_section
,
3660 bfd
*output_bfd
, char **msg ATTRIBUTE_UNUSED
)
3662 /* This part is from bfd_elf_generic_reloc. */
3663 if (output_bfd
!= NULL
3664 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
3665 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
3667 reloc_entry
->address
+= input_section
->output_offset
;
3668 return bfd_reloc_ok
;
3671 if (output_bfd
!= NULL
)
3672 /* FIXME: See bfd_perform_relocation. Is this right? */
3673 return bfd_reloc_continue
;
3675 return nios2_elf32_do_callr_relocate (abfd
, reloc_entry
->howto
,
3677 data
, reloc_entry
->address
,
3679 + symbol
->section
->output_section
->vma
3680 + symbol
->section
->output_offset
),
3681 reloc_entry
->addend
);
3685 /* Implement elf_backend_relocate_section. */
3687 nios2_elf32_relocate_section (bfd
*output_bfd
,
3688 struct bfd_link_info
*info
,
3690 asection
*input_section
,
3692 Elf_Internal_Rela
*relocs
,
3693 Elf_Internal_Sym
*local_syms
,
3694 asection
**local_sections
)
3696 Elf_Internal_Shdr
*symtab_hdr
;
3697 struct elf_link_hash_entry
**sym_hashes
;
3698 Elf_Internal_Rela
*rel
;
3699 Elf_Internal_Rela
*relend
;
3700 struct elf32_nios2_link_hash_table
*htab
;
3703 asection
*sreloc
= NULL
;
3704 bfd_vma
*local_got_offsets
;
3707 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3708 sym_hashes
= elf_sym_hashes (input_bfd
);
3709 relend
= relocs
+ input_section
->reloc_count
;
3711 htab
= elf32_nios2_hash_table (info
);
3712 sgot
= htab
->root
.sgot
;
3713 splt
= htab
->root
.splt
;
3714 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3716 if (elf32_nios2_hash_table (info
)->h_gp_got
== NULL
)
3719 got_base
= elf32_nios2_hash_table (info
)->h_gp_got
->root
.u
.def
.value
;
3721 for (rel
= relocs
; rel
< relend
; rel
++)
3723 reloc_howto_type
*howto
;
3724 unsigned long r_symndx
;
3725 Elf_Internal_Sym
*sym
;
3727 struct elf_link_hash_entry
*h
;
3728 struct elf32_nios2_link_hash_entry
*eh
;
3731 bfd_reloc_status_type r
= bfd_reloc_ok
;
3732 const char *name
= NULL
;
3736 const char* msg
= (const char*) NULL
;
3737 bfd_boolean unresolved_reloc
;
3741 r_type
= ELF32_R_TYPE (rel
->r_info
);
3742 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3744 howto
= lookup_howto ((unsigned) ELF32_R_TYPE (rel
->r_info
), output_bfd
);
3749 if (r_symndx
< symtab_hdr
->sh_info
)
3751 sym
= local_syms
+ r_symndx
;
3752 sec
= local_sections
[r_symndx
];
3753 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
3757 bfd_boolean warned
, ignored
;
3759 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3760 r_symndx
, symtab_hdr
, sym_hashes
,
3762 unresolved_reloc
, warned
, ignored
);
3765 if (sec
&& discarded_section (sec
))
3766 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3767 rel
, 1, relend
, howto
, 0, contents
);
3769 /* Nothing more to do unless this is a final link. */
3770 if (bfd_link_relocatable (info
))
3775 switch (howto
->type
)
3778 r
= nios2_elf32_do_hi16_relocate (input_bfd
, howto
,
3780 contents
, rel
->r_offset
,
3781 relocation
, rel
->r_addend
);
3784 r
= nios2_elf32_do_lo16_relocate (input_bfd
, howto
,
3786 contents
, rel
->r_offset
,
3787 relocation
, rel
->r_addend
);
3789 case R_NIOS2_PCREL_LO
:
3790 r
= nios2_elf32_do_pcrel_lo16_relocate (input_bfd
, howto
,
3797 case R_NIOS2_HIADJ16
:
3798 r
= nios2_elf32_do_hiadj16_relocate (input_bfd
, howto
,
3799 input_section
, contents
,
3800 rel
->r_offset
, relocation
,
3803 case R_NIOS2_PCREL_HA
:
3804 r
= nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd
, howto
,
3811 case R_NIOS2_PCREL16
:
3812 r
= nios2_elf32_do_pcrel16_relocate (input_bfd
, howto
,
3813 input_section
, contents
,
3814 rel
->r_offset
, relocation
,
3818 /* Turns an absolute address into a gp-relative address. */
3819 if (!nios2_elf_assign_gp (output_bfd
, &gp
, info
))
3821 bfd_vma reloc_address
;
3823 if (sec
&& sec
->output_section
)
3824 reloc_address
= (sec
->output_section
->vma
3825 + sec
->output_offset
3830 format
= _("global pointer relative relocation at address "
3831 "0x%08x when _gp not defined\n");
3832 sprintf (msgbuf
, format
, reloc_address
);
3834 r
= bfd_reloc_dangerous
;
3838 bfd_vma symbol_address
= rel
->r_addend
+ relocation
;
3839 relocation
= symbol_address
- gp
;
3841 if (((signed) relocation
< -32768
3842 || (signed) relocation
> 32767)
3844 || h
->root
.type
== bfd_link_hash_defined
3845 || h
->root
.type
== bfd_link_hash_defweak
))
3848 name
= h
->root
.root
.string
;
3849 format
= _("Unable to reach %s (at 0x%08x) from the "
3850 "global pointer (at 0x%08x) because the "
3851 "offset (%d) is out of the allowed range, "
3852 "-32678 to 32767.\n" );
3853 sprintf (msgbuf
, format
, name
, symbol_address
, gp
,
3854 (signed)relocation
);
3856 r
= bfd_reloc_outofrange
;
3859 r
= _bfd_final_link_relocate (howto
, input_bfd
,
3860 input_section
, contents
,
3861 rel
->r_offset
, relocation
,
3866 r
= nios2_elf32_do_ujmp_relocate (input_bfd
, howto
,
3868 contents
, rel
->r_offset
,
3869 relocation
, rel
->r_addend
);
3872 r
= nios2_elf32_do_cjmp_relocate (input_bfd
, howto
,
3874 contents
, rel
->r_offset
,
3875 relocation
, rel
->r_addend
);
3878 r
= nios2_elf32_do_callr_relocate (input_bfd
, howto
,
3879 input_section
, contents
,
3880 rel
->r_offset
, relocation
,
3883 case R_NIOS2_CALL26
:
3884 case R_NIOS2_CALL26_NOAT
:
3885 /* If we have a call to an undefined weak symbol, we just want
3886 to stuff a zero in the bits of the call instruction and
3887 bypass the normal call26 relocation handling, because it'll
3888 diagnose an overflow error if address 0 isn't in the same
3889 256MB segment as the call site. Presumably the call
3890 should be guarded by a null check anyway. */
3891 if (h
!= NULL
&& h
->root
.type
== bfd_link_hash_undefweak
)
3893 BFD_ASSERT (relocation
== 0 && rel
->r_addend
== 0);
3894 r
= _bfd_final_link_relocate (howto
, input_bfd
,
3895 input_section
, contents
,
3896 rel
->r_offset
, relocation
,
3900 /* Handle relocations which should use the PLT entry.
3901 NIOS2_BFD_RELOC_32 relocations will use the symbol's value,
3902 which may point to a PLT entry, but we don't need to handle
3903 that here. If we created a PLT entry, all branches in this
3904 object should go to it. */
3905 if (h
!= NULL
&& splt
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
3907 /* If we've created a .plt section, and assigned a PLT entry
3908 to this function, it should not be known to bind locally.
3909 If it were, we would have cleared the PLT entry. */
3910 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info
, h
));
3912 relocation
= (splt
->output_section
->vma
3913 + splt
->output_offset
3916 unresolved_reloc
= FALSE
;
3918 /* Detect R_NIOS2_CALL26 relocations that would overflow the
3919 256MB segment. Replace the target with a reference to a
3921 Note that htab->stub_group is null if relaxation has been
3922 disabled by the --no-relax linker command-line option, so
3923 we can use that to skip this processing entirely. */
3924 if (howto
->type
== R_NIOS2_CALL26
&& htab
->stub_group
)
3926 bfd_vma dest
= relocation
+ rel
->r_addend
;
3927 enum elf32_nios2_stub_type stub_type
;
3929 eh
= (struct elf32_nios2_link_hash_entry
*)h
;
3930 stub_type
= nios2_type_of_stub (input_section
, rel
, eh
,
3933 if (stub_type
!= nios2_stub_none
)
3935 struct elf32_nios2_stub_hash_entry
*hsh
;
3937 hsh
= nios2_get_stub_entry (input_section
, sec
,
3938 eh
, rel
, htab
, stub_type
);
3941 r
= bfd_reloc_undefined
;
3945 dest
= (hsh
->stub_offset
3946 + hsh
->stub_sec
->output_offset
3947 + hsh
->stub_sec
->output_section
->vma
);
3948 r
= nios2_elf32_do_call26_relocate (input_bfd
, howto
,
3958 r
= nios2_elf32_do_call26_relocate (input_bfd
, howto
,
3959 input_section
, contents
,
3960 rel
->r_offset
, relocation
,
3965 /* For symmetry this would be
3966 r = nios2_elf32_do_ignore_reloc (input_bfd, howto,
3967 input_section, contents,
3968 rel->r_offset, relocation,
3970 but do_ignore_reloc would do no more than return
3975 case R_NIOS2_CALL16
:
3976 case R_NIOS2_GOT_LO
:
3977 case R_NIOS2_GOT_HA
:
3978 case R_NIOS2_CALL_LO
:
3979 case R_NIOS2_CALL_HA
:
3980 /* Relocation is to the entry for this symbol in the
3981 global offset table. */
3984 r
= bfd_reloc_notsupported
;
3994 eh
= (struct elf32_nios2_link_hash_entry
*)h
;
3995 use_plt
= (eh
->got_types_used
== CALL_USED
3996 && h
->plt
.offset
!= (bfd_vma
) -1);
3998 off
= h
->got
.offset
;
3999 BFD_ASSERT (off
!= (bfd_vma
) -1);
4000 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
4001 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
4002 bfd_link_pic (info
),
4004 || (bfd_link_pic (info
)
4005 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4006 || (ELF_ST_VISIBILITY (h
->other
)
4007 && h
->root
.type
== bfd_link_hash_undefweak
))
4009 /* This is actually a static link, or it is a -Bsymbolic
4010 link and the symbol is defined locally. We must
4011 initialize this entry in the global offset table.
4012 Since the offset must always be a multiple of 4, we
4013 use the least significant bit to record whether we
4014 have initialized it already.
4016 When doing a dynamic link, we create a .rela.got
4017 relocation entry to initialize the value. This is
4018 done in the finish_dynamic_symbol routine. */
4023 bfd_put_32 (output_bfd
, relocation
,
4024 sgot
->contents
+ off
);
4029 unresolved_reloc
= FALSE
;
4033 BFD_ASSERT (local_got_offsets
!= NULL
4034 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
4036 off
= local_got_offsets
[r_symndx
];
4038 /* The offset must always be a multiple of 4. We use the
4039 least significant bit to record whether we have already
4040 generated the necessary reloc. */
4045 bfd_put_32 (output_bfd
, relocation
,
4046 sgot
->contents
+ off
);
4048 if (bfd_link_pic (info
))
4051 Elf_Internal_Rela outrel
;
4054 srelgot
= htab
->root
.srelgot
;
4055 BFD_ASSERT (srelgot
!= NULL
);
4057 outrel
.r_addend
= relocation
;
4058 outrel
.r_offset
= (sgot
->output_section
->vma
4059 + sgot
->output_offset
4061 outrel
.r_info
= ELF32_R_INFO (0, R_NIOS2_RELATIVE
);
4062 loc
= srelgot
->contents
;
4063 loc
+= (srelgot
->reloc_count
++ *
4064 sizeof (Elf32_External_Rela
));
4065 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
4068 local_got_offsets
[r_symndx
] |= 1;
4072 if (use_plt
&& bfd_link_pic (info
))
4074 off
= ((h
->plt
.offset
- 24) / 12 + 3) * 4;
4075 relocation
= (htab
->root
.sgotplt
->output_offset
+ off
4079 relocation
= sgot
->output_offset
+ off
- got_base
;
4081 /* This relocation does not use the addend. */
4084 switch (howto
->type
)
4086 case R_NIOS2_GOT_LO
:
4087 case R_NIOS2_CALL_LO
:
4088 r
= nios2_elf32_do_lo16_relocate (input_bfd
, howto
,
4089 input_section
, contents
,
4090 rel
->r_offset
, relocation
,
4093 case R_NIOS2_GOT_HA
:
4094 case R_NIOS2_CALL_HA
:
4095 r
= nios2_elf32_do_hiadj16_relocate (input_bfd
, howto
,
4096 input_section
, contents
,
4102 r
= _bfd_final_link_relocate (howto
, input_bfd
,
4103 input_section
, contents
,
4104 rel
->r_offset
, relocation
,
4110 case R_NIOS2_GOTOFF_LO
:
4111 case R_NIOS2_GOTOFF_HA
:
4112 case R_NIOS2_GOTOFF
:
4113 /* Relocation is relative to the global offset table pointer. */
4115 BFD_ASSERT (sgot
!= NULL
);
4118 r
= bfd_reloc_notsupported
;
4122 /* Note that sgot->output_offset is not involved in this
4123 calculation. We always want the start of .got. */
4124 relocation
-= sgot
->output_section
->vma
;
4126 /* Now we adjust the relocation to be relative to the GOT pointer
4127 (the _gp_got symbol), which possibly contains the 0x8000 bias. */
4128 relocation
-= got_base
;
4130 switch (howto
->type
)
4132 case R_NIOS2_GOTOFF_LO
:
4133 r
= nios2_elf32_do_lo16_relocate (input_bfd
, howto
,
4134 input_section
, contents
,
4135 rel
->r_offset
, relocation
,
4138 case R_NIOS2_GOTOFF_HA
:
4139 r
= nios2_elf32_do_hiadj16_relocate (input_bfd
, howto
,
4140 input_section
, contents
,
4146 r
= _bfd_final_link_relocate (howto
, input_bfd
,
4147 input_section
, contents
,
4148 rel
->r_offset
, relocation
,
4154 case R_NIOS2_TLS_LDO16
:
4155 relocation
-= dtpoff_base (info
) + DTP_OFFSET
;
4157 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4158 contents
, rel
->r_offset
,
4159 relocation
, rel
->r_addend
);
4161 case R_NIOS2_TLS_LDM16
:
4162 if (htab
->root
.sgot
== NULL
)
4165 off
= htab
->tls_ldm_got
.offset
;
4171 /* If we don't know the module number, create a relocation
4173 if (bfd_link_pic (info
))
4175 Elf_Internal_Rela outrel
;
4178 if (htab
->root
.srelgot
== NULL
)
4181 outrel
.r_addend
= 0;
4182 outrel
.r_offset
= (htab
->root
.sgot
->output_section
->vma
4183 + htab
->root
.sgot
->output_offset
4185 outrel
.r_info
= ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD
);
4187 loc
= htab
->root
.srelgot
->contents
;
4188 loc
+= (htab
->root
.srelgot
->reloc_count
++
4189 * sizeof (Elf32_External_Rela
));
4190 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
4193 bfd_put_32 (output_bfd
, 1,
4194 htab
->root
.sgot
->contents
+ off
);
4196 htab
->tls_ldm_got
.offset
|= 1;
4199 relocation
= htab
->root
.sgot
->output_offset
+ off
- got_base
;
4201 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4202 contents
, rel
->r_offset
,
4203 relocation
, rel
->r_addend
);
4206 case R_NIOS2_TLS_GD16
:
4207 case R_NIOS2_TLS_IE16
:
4212 if (htab
->root
.sgot
== NULL
)
4219 dyn
= htab
->root
.dynamic_sections_created
;
4220 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
4221 bfd_link_pic (info
),
4223 && (!bfd_link_pic (info
)
4224 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
4226 unresolved_reloc
= FALSE
;
4229 off
= h
->got
.offset
;
4230 tls_type
= (((struct elf32_nios2_link_hash_entry
*) h
)
4235 if (local_got_offsets
== NULL
)
4237 off
= local_got_offsets
[r_symndx
];
4238 tls_type
= (elf32_nios2_local_got_tls_type (input_bfd
)
4242 if (tls_type
== GOT_UNKNOWN
)
4249 bfd_boolean need_relocs
= FALSE
;
4250 Elf_Internal_Rela outrel
;
4251 bfd_byte
*loc
= NULL
;
4254 /* The GOT entries have not been initialized yet. Do it
4255 now, and emit any relocations. If both an IE GOT and a
4256 GD GOT are necessary, we emit the GD first. */
4258 if ((bfd_link_pic (info
) || indx
!= 0)
4260 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4261 || h
->root
.type
!= bfd_link_hash_undefweak
))
4264 if (htab
->root
.srelgot
== NULL
)
4266 loc
= htab
->root
.srelgot
->contents
;
4267 loc
+= (htab
->root
.srelgot
->reloc_count
*
4268 sizeof (Elf32_External_Rela
));
4271 if (tls_type
& GOT_TLS_GD
)
4275 outrel
.r_addend
= 0;
4276 outrel
.r_offset
= (htab
->root
.sgot
->output_section
->vma
4277 + htab
->root
.sgot
->output_offset
4279 outrel
.r_info
= ELF32_R_INFO (indx
,
4280 R_NIOS2_TLS_DTPMOD
);
4282 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
4284 htab
->root
.srelgot
->reloc_count
++;
4285 loc
+= sizeof (Elf32_External_Rela
);
4288 bfd_put_32 (output_bfd
,
4289 (relocation
- dtpoff_base (info
) -
4291 htab
->root
.sgot
->contents
+ cur_off
+ 4);
4294 outrel
.r_addend
= 0;
4295 outrel
.r_info
= ELF32_R_INFO (indx
,
4296 R_NIOS2_TLS_DTPREL
);
4297 outrel
.r_offset
+= 4;
4299 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
4301 htab
->root
.srelgot
->reloc_count
++;
4302 loc
+= sizeof (Elf32_External_Rela
);
4307 /* If we are not emitting relocations for a
4308 general dynamic reference, then we must be in a
4309 static link or an executable link with the
4310 symbol binding locally. Mark it as belonging
4311 to module 1, the executable. */
4312 bfd_put_32 (output_bfd
, 1,
4313 htab
->root
.sgot
->contents
+ cur_off
);
4314 bfd_put_32 (output_bfd
, (relocation
-
4315 dtpoff_base (info
) -
4317 htab
->root
.sgot
->contents
+ cur_off
+ 4);
4323 if (tls_type
& GOT_TLS_IE
)
4328 outrel
.r_addend
= (relocation
-
4329 dtpoff_base (info
));
4331 outrel
.r_addend
= 0;
4332 outrel
.r_offset
= (htab
->root
.sgot
->output_section
->vma
4333 + htab
->root
.sgot
->output_offset
4335 outrel
.r_info
= ELF32_R_INFO (indx
,
4338 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,
4340 htab
->root
.srelgot
->reloc_count
++;
4341 loc
+= sizeof (Elf32_External_Rela
);
4344 bfd_put_32 (output_bfd
, (tpoff (info
, relocation
)
4346 htab
->root
.sgot
->contents
+ cur_off
);
4353 local_got_offsets
[r_symndx
] |= 1;
4356 if ((tls_type
& GOT_TLS_GD
) && r_type
!= R_NIOS2_TLS_GD16
)
4358 relocation
= htab
->root
.sgot
->output_offset
+ off
- got_base
;
4360 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4361 contents
, rel
->r_offset
,
4362 relocation
, rel
->r_addend
);
4366 case R_NIOS2_TLS_LE16
:
4367 if (bfd_link_dll (info
))
4370 (_("%B(%A+0x%lx): R_NIOS2_TLS_LE16 relocation not "
4371 "permitted in shared object"),
4372 input_bfd
, input_section
,
4373 (long) rel
->r_offset
, howto
->name
);
4377 relocation
= tpoff (info
, relocation
) - TP_OFFSET
;
4379 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4380 contents
, rel
->r_offset
,
4381 relocation
, rel
->r_addend
);
4384 case R_NIOS2_BFD_RELOC_32
:
4385 if (bfd_link_pic (info
)
4386 && (input_section
->flags
& SEC_ALLOC
) != 0
4388 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4389 || h
->root
.type
!= bfd_link_hash_undefweak
))
4391 Elf_Internal_Rela outrel
;
4393 bfd_boolean skip
, relocate
;
4395 /* When generating a shared object, these relocations
4396 are copied into the output file to be resolved at run
4403 = _bfd_elf_section_offset (output_bfd
, info
,
4404 input_section
, rel
->r_offset
);
4405 if (outrel
.r_offset
== (bfd_vma
) -1)
4407 else if (outrel
.r_offset
== (bfd_vma
) -2)
4408 skip
= TRUE
, relocate
= TRUE
;
4409 outrel
.r_offset
+= (input_section
->output_section
->vma
4410 + input_section
->output_offset
);
4413 memset (&outrel
, 0, sizeof outrel
);
4416 && (!bfd_link_pic (info
)
4417 || !SYMBOLIC_BIND (info
, h
)
4418 || !h
->def_regular
))
4420 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4421 outrel
.r_addend
= rel
->r_addend
;
4425 /* This symbol is local, or marked to become local. */
4426 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4428 outrel
.r_info
= ELF32_R_INFO (0, R_NIOS2_RELATIVE
);
4431 sreloc
= elf_section_data (input_section
)->sreloc
;
4435 loc
= sreloc
->contents
;
4436 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rela
);
4437 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
4439 /* This reloc will be computed at runtime, so there's no
4440 need to do anything now, except for R_NIOS2_BFD_RELOC_32
4441 relocations that have been turned into
4442 R_NIOS2_RELATIVE. */
4447 r
= _bfd_final_link_relocate (howto
, input_bfd
,
4448 input_section
, contents
,
4449 rel
->r_offset
, relocation
,
4453 case R_NIOS2_TLS_DTPREL
:
4454 relocation
-= dtpoff_base (info
);
4458 r
= _bfd_final_link_relocate (howto
, input_bfd
,
4459 input_section
, contents
,
4460 rel
->r_offset
, relocation
,
4466 r
= bfd_reloc_notsupported
;
4468 if (r
!= bfd_reloc_ok
)
4471 name
= h
->root
.root
.string
;
4474 name
= bfd_elf_string_from_elf_section (input_bfd
,
4475 symtab_hdr
->sh_link
,
4477 if (name
== NULL
|| *name
== '\0')
4478 name
= bfd_section_name (input_bfd
, sec
);
4483 case bfd_reloc_overflow
:
4484 (*info
->callbacks
->reloc_overflow
) (info
, NULL
, name
,
4485 howto
->name
, (bfd_vma
) 0,
4486 input_bfd
, input_section
,
4490 case bfd_reloc_undefined
:
4491 (*info
->callbacks
->undefined_symbol
) (info
, name
, input_bfd
,
4493 rel
->r_offset
, TRUE
);
4496 case bfd_reloc_outofrange
:
4498 msg
= _("relocation out of range");
4501 case bfd_reloc_notsupported
:
4503 msg
= _("unsupported relocation");
4506 case bfd_reloc_dangerous
:
4508 msg
= _("dangerous relocation");
4513 msg
= _("unknown error");
4519 (*info
->callbacks
->warning
) (info
, msg
, name
, input_bfd
,
4520 input_section
, rel
->r_offset
);
4528 /* Implement elf-backend_section_flags:
4529 Convert NIOS2 specific section flags to bfd internal section flags. */
4531 nios2_elf32_section_flags (flagword
*flags
, const Elf_Internal_Shdr
*hdr
)
4533 if (hdr
->sh_flags
& SHF_NIOS2_GPREL
)
4534 *flags
|= SEC_SMALL_DATA
;
4539 /* Implement elf_backend_fake_sections:
4540 Set the correct type for an NIOS2 ELF section. We do this by the
4541 section name, which is a hack, but ought to work. */
4543 nios2_elf32_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
4544 Elf_Internal_Shdr
*hdr
, asection
*sec
)
4546 register const char *name
= bfd_get_section_name (abfd
, sec
);
4548 if ((sec
->flags
& SEC_SMALL_DATA
)
4549 || strcmp (name
, ".sdata") == 0
4550 || strcmp (name
, ".sbss") == 0
4551 || strcmp (name
, ".lit4") == 0 || strcmp (name
, ".lit8") == 0)
4552 hdr
->sh_flags
|= SHF_NIOS2_GPREL
;
4557 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
4558 shortcuts to them in our hash table. */
4560 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
4562 struct elf32_nios2_link_hash_table
*htab
;
4563 struct elf_link_hash_entry
*h
;
4565 htab
= elf32_nios2_hash_table (info
);
4567 if (! _bfd_elf_create_got_section (dynobj
, info
))
4570 /* In order for the two loads in .PLTresolve to share the same %hiadj,
4571 _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */
4572 if (!bfd_set_section_alignment (dynobj
, htab
->root
.sgotplt
, 4))
4575 /* The Nios II ABI specifies that GOT-relative relocations are relative
4576 to the linker-created symbol _gp_got, rather than using
4577 _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always
4578 points to the base of the GOT while _gp_got may include a bias. */
4579 h
= _bfd_elf_define_linkage_sym (dynobj
, info
, htab
->root
.sgotplt
,
4581 elf32_nios2_hash_table (info
)->h_gp_got
= h
;
4588 /* Implement elf_backend_create_dynamic_sections:
4589 Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
4590 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
4593 nios2_elf32_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
4595 struct elf32_nios2_link_hash_table
*htab
;
4597 htab
= elf32_nios2_hash_table (info
);
4598 if (!htab
->root
.sgot
&& !create_got_section (dynobj
, info
))
4601 _bfd_elf_create_dynamic_sections (dynobj
, info
);
4603 /* In order for the two loads in a shared object .PLTresolve to share the
4604 same %hiadj, the start of the PLT (as well as the GOT) must be aligned
4605 to a 16-byte boundary. This is because the addresses for these loads
4606 include the -(.plt+4) PIC correction. */
4607 if (!bfd_set_section_alignment (dynobj
, htab
->root
.splt
, 4))
4610 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
4613 if (!bfd_link_pic (info
))
4615 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
4623 /* Implement elf_backend_copy_indirect_symbol:
4624 Copy the extra info we tack onto an elf_link_hash_entry. */
4626 nios2_elf32_copy_indirect_symbol (struct bfd_link_info
*info
,
4627 struct elf_link_hash_entry
*dir
,
4628 struct elf_link_hash_entry
*ind
)
4630 struct elf32_nios2_link_hash_entry
*edir
, *eind
;
4632 edir
= (struct elf32_nios2_link_hash_entry
*) dir
;
4633 eind
= (struct elf32_nios2_link_hash_entry
*) ind
;
4635 if (eind
->dyn_relocs
!= NULL
)
4637 if (edir
->dyn_relocs
!= NULL
)
4639 struct elf32_nios2_dyn_relocs
**pp
;
4640 struct elf32_nios2_dyn_relocs
*p
;
4642 /* Add reloc counts against the indirect sym to the direct sym
4643 list. Merge any entries against the same section. */
4644 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
4646 struct elf32_nios2_dyn_relocs
*q
;
4648 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
4649 if (q
->sec
== p
->sec
)
4651 q
->pc_count
+= p
->pc_count
;
4652 q
->count
+= p
->count
;
4659 *pp
= edir
->dyn_relocs
;
4662 edir
->dyn_relocs
= eind
->dyn_relocs
;
4663 eind
->dyn_relocs
= NULL
;
4666 if (ind
->root
.type
== bfd_link_hash_indirect
4667 && dir
->got
.refcount
<= 0)
4669 edir
->tls_type
= eind
->tls_type
;
4670 eind
->tls_type
= GOT_UNKNOWN
;
4673 edir
->got_types_used
|= eind
->got_types_used
;
4675 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
4678 /* Set the right machine number for a NIOS2 ELF file. */
4681 nios2_elf32_object_p (bfd
*abfd
)
4685 mach
= elf_elfheader (abfd
)->e_flags
;
4690 case EF_NIOS2_ARCH_R1
:
4691 bfd_default_set_arch_mach (abfd
, bfd_arch_nios2
, bfd_mach_nios2r1
);
4693 case EF_NIOS2_ARCH_R2
:
4694 bfd_default_set_arch_mach (abfd
, bfd_arch_nios2
, bfd_mach_nios2r2
);
4701 /* Implement elf_backend_check_relocs:
4702 Look through the relocs for a section during the first phase. */
4704 nios2_elf32_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
4705 asection
*sec
, const Elf_Internal_Rela
*relocs
)
4708 Elf_Internal_Shdr
*symtab_hdr
;
4709 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
4710 const Elf_Internal_Rela
*rel
;
4711 const Elf_Internal_Rela
*rel_end
;
4712 struct elf32_nios2_link_hash_table
*htab
;
4715 asection
*sreloc
= NULL
;
4716 bfd_signed_vma
*local_got_refcounts
;
4718 if (bfd_link_relocatable (info
))
4721 dynobj
= elf_hash_table (info
)->dynobj
;
4722 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4723 sym_hashes
= elf_sym_hashes (abfd
);
4724 sym_hashes_end
= (sym_hashes
4725 + symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
));
4726 if (!elf_bad_symtab (abfd
))
4727 sym_hashes_end
-= symtab_hdr
->sh_info
;
4728 local_got_refcounts
= elf_local_got_refcounts (abfd
);
4730 htab
= elf32_nios2_hash_table (info
);
4731 sgot
= htab
->root
.sgot
;
4732 srelgot
= htab
->root
.srelgot
;
4734 rel_end
= relocs
+ sec
->reloc_count
;
4735 for (rel
= relocs
; rel
< rel_end
; rel
++)
4737 unsigned int r_type
;
4738 struct elf_link_hash_entry
*h
;
4739 unsigned long r_symndx
;
4741 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4742 if (r_symndx
< symtab_hdr
->sh_info
)
4746 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4747 while (h
->root
.type
== bfd_link_hash_indirect
4748 || h
->root
.type
== bfd_link_hash_warning
)
4749 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4751 /* PR15323, ref flags aren't set for references in the same
4753 h
->root
.non_ir_ref
= 1;
4756 r_type
= ELF32_R_TYPE (rel
->r_info
);
4761 case R_NIOS2_GOT_LO
:
4762 case R_NIOS2_GOT_HA
:
4763 case R_NIOS2_CALL16
:
4764 case R_NIOS2_CALL_LO
:
4765 case R_NIOS2_CALL_HA
:
4766 case R_NIOS2_TLS_GD16
:
4767 case R_NIOS2_TLS_IE16
:
4768 /* This symbol requires a global offset table entry. */
4770 int tls_type
, old_tls_type
;
4776 case R_NIOS2_GOT_LO
:
4777 case R_NIOS2_GOT_HA
:
4778 case R_NIOS2_CALL16
:
4779 case R_NIOS2_CALL_LO
:
4780 case R_NIOS2_CALL_HA
:
4781 tls_type
= GOT_NORMAL
;
4783 case R_NIOS2_TLS_GD16
:
4784 tls_type
= GOT_TLS_GD
;
4786 case R_NIOS2_TLS_IE16
:
4787 tls_type
= GOT_TLS_IE
;
4793 /* Create the .got section. */
4794 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
4795 nios2_elf32_create_dynamic_sections (dynobj
, info
);
4800 sgot
= htab
->root
.sgot
;
4801 BFD_ASSERT (sgot
!= NULL
);
4805 && (h
!= NULL
|| bfd_link_pic (info
)))
4807 srelgot
= htab
->root
.srelgot
;
4808 BFD_ASSERT (srelgot
!= NULL
);
4813 struct elf32_nios2_link_hash_entry
*eh
4814 = (struct elf32_nios2_link_hash_entry
*)h
;
4816 old_tls_type
= elf32_nios2_hash_entry(h
)->tls_type
;
4817 if (r_type
== R_NIOS2_CALL16
4818 || r_type
== R_NIOS2_CALL_LO
4819 || r_type
== R_NIOS2_CALL_HA
)
4821 /* Make sure a plt entry is created for this symbol if
4822 it turns out to be a function defined by a dynamic
4827 eh
->got_types_used
|= CALL_USED
;
4830 eh
->got_types_used
|= GOT_USED
;
4834 /* This is a global offset table entry for a local symbol. */
4835 if (local_got_refcounts
== NULL
)
4839 size
= symtab_hdr
->sh_info
;
4840 size
*= (sizeof (bfd_signed_vma
) + sizeof (char));
4842 = ((bfd_signed_vma
*) bfd_zalloc (abfd
, size
));
4843 if (local_got_refcounts
== NULL
)
4845 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
4846 elf32_nios2_local_got_tls_type (abfd
)
4847 = (char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
4849 local_got_refcounts
[r_symndx
]++;
4850 old_tls_type
= elf32_nios2_local_got_tls_type (abfd
) [r_symndx
];
4853 /* We will already have issued an error message if there is a
4854 TLS / non-TLS mismatch, based on the symbol type. We don't
4855 support any linker relaxations. So just combine any TLS
4857 if (old_tls_type
!= GOT_UNKNOWN
&& old_tls_type
!= GOT_NORMAL
4858 && tls_type
!= GOT_NORMAL
)
4859 tls_type
|= old_tls_type
;
4861 if (old_tls_type
!= tls_type
)
4864 elf32_nios2_hash_entry (h
)->tls_type
= tls_type
;
4866 elf32_nios2_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
4870 case R_NIOS2_TLS_LDM16
:
4871 if (r_type
== R_NIOS2_TLS_LDM16
)
4872 htab
->tls_ldm_got
.refcount
++;
4874 if (htab
->root
.sgot
== NULL
)
4876 if (htab
->root
.dynobj
== NULL
)
4877 htab
->root
.dynobj
= abfd
;
4878 if (!create_got_section (htab
->root
.dynobj
, info
))
4883 /* This relocation describes the C++ object vtable hierarchy.
4884 Reconstruct it for later use during GC. */
4885 case R_NIOS2_GNU_VTINHERIT
:
4886 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4890 /* This relocation describes which C++ vtable entries are actually
4891 used. Record for later use during GC. */
4892 case R_NIOS2_GNU_VTENTRY
:
4893 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
4897 case R_NIOS2_BFD_RELOC_32
:
4898 case R_NIOS2_CALL26
:
4899 case R_NIOS2_CALL26_NOAT
:
4900 case R_NIOS2_HIADJ16
:
4905 /* If this reloc is in a read-only section, we might
4906 need a copy reloc. We can't check reliably at this
4907 stage whether the section is read-only, as input
4908 sections have not yet been mapped to output sections.
4909 Tentatively set the flag for now, and correct in
4910 adjust_dynamic_symbol. */
4911 if (!bfd_link_pic (info
))
4914 /* Make sure a plt entry is created for this symbol if it
4915 turns out to be a function defined by a dynamic object. */
4918 if (r_type
== R_NIOS2_CALL26
|| r_type
== R_NIOS2_CALL26_NOAT
)
4922 /* If we are creating a shared library, we need to copy the
4923 reloc into the shared library. */
4924 if (bfd_link_pic (info
)
4925 && (sec
->flags
& SEC_ALLOC
) != 0
4926 && (r_type
== R_NIOS2_BFD_RELOC_32
4927 || (h
!= NULL
&& ! h
->needs_plt
4928 && (! SYMBOLIC_BIND (info
, h
) || ! h
->def_regular
))))
4930 struct elf32_nios2_dyn_relocs
*p
;
4931 struct elf32_nios2_dyn_relocs
**head
;
4933 /* When creating a shared object, we must copy these
4934 reloc types into the output file. We create a reloc
4935 section in dynobj and make room for this reloc. */
4938 sreloc
= _bfd_elf_make_dynamic_reloc_section
4939 (sec
, dynobj
, 2, abfd
, TRUE
);
4944 /* If this is a global symbol, we count the number of
4945 relocations we need for this symbol. */
4947 head
= &((struct elf32_nios2_link_hash_entry
*) h
)->dyn_relocs
;
4950 /* Track dynamic relocs needed for local syms too.
4951 We really need local syms available to do this
4956 Elf_Internal_Sym
*isym
;
4958 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
4963 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4967 vpp
= &elf_section_data (s
)->local_dynrel
;
4968 head
= (struct elf32_nios2_dyn_relocs
**) vpp
;
4972 if (p
== NULL
|| p
->sec
!= sec
)
4974 bfd_size_type amt
= sizeof *p
;
4975 p
= ((struct elf32_nios2_dyn_relocs
*)
4976 bfd_alloc (htab
->root
.dynobj
, amt
));
4997 /* Implement elf_backend_gc_mark_hook:
4998 Return the section that should be marked against GC for a given
5001 nios2_elf32_gc_mark_hook (asection
*sec
,
5002 struct bfd_link_info
*info
,
5003 Elf_Internal_Rela
*rel
,
5004 struct elf_link_hash_entry
*h
,
5005 Elf_Internal_Sym
*sym
)
5008 switch (ELF32_R_TYPE (rel
->r_info
))
5010 case R_NIOS2_GNU_VTINHERIT
:
5011 case R_NIOS2_GNU_VTENTRY
:
5014 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
5017 /* Implement elf_backend_gc_sweep_hook:
5018 Update the got entry reference counts for the section being removed. */
5020 nios2_elf32_gc_sweep_hook (bfd
*abfd
,
5021 struct bfd_link_info
*info
,
5023 const Elf_Internal_Rela
*relocs
)
5025 Elf_Internal_Shdr
*symtab_hdr
;
5026 struct elf_link_hash_entry
**sym_hashes
;
5027 bfd_signed_vma
*local_got_refcounts
;
5028 const Elf_Internal_Rela
*rel
, *relend
;
5031 if (bfd_link_relocatable (info
))
5034 elf_section_data (sec
)->local_dynrel
= NULL
;
5036 dynobj
= elf_hash_table (info
)->dynobj
;
5040 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5041 sym_hashes
= elf_sym_hashes (abfd
);
5042 local_got_refcounts
= elf_local_got_refcounts (abfd
);
5044 relend
= relocs
+ sec
->reloc_count
;
5045 for (rel
= relocs
; rel
< relend
; rel
++)
5047 unsigned long r_symndx
;
5048 struct elf_link_hash_entry
*h
= NULL
;
5051 r_symndx
= ELF32_R_SYM (rel
->r_info
);
5052 if (r_symndx
>= symtab_hdr
->sh_info
)
5054 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
5055 while (h
->root
.type
== bfd_link_hash_indirect
5056 || h
->root
.type
== bfd_link_hash_warning
)
5057 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5060 r_type
= ELF32_R_TYPE (rel
->r_info
);
5064 case R_NIOS2_GOT_LO
:
5065 case R_NIOS2_GOT_HA
:
5066 case R_NIOS2_CALL16
:
5067 case R_NIOS2_CALL_LO
:
5068 case R_NIOS2_CALL_HA
:
5071 if (h
->got
.refcount
> 0)
5074 else if (local_got_refcounts
!= NULL
)
5076 if (local_got_refcounts
[r_symndx
] > 0)
5077 --local_got_refcounts
[r_symndx
];
5081 case R_NIOS2_PCREL_LO
:
5082 case R_NIOS2_PCREL_HA
:
5083 case R_NIOS2_BFD_RELOC_32
:
5084 case R_NIOS2_CALL26
:
5085 case R_NIOS2_CALL26_NOAT
:
5088 struct elf32_nios2_link_hash_entry
*eh
;
5089 struct elf32_nios2_dyn_relocs
**pp
;
5090 struct elf32_nios2_dyn_relocs
*p
;
5092 eh
= (struct elf32_nios2_link_hash_entry
*) h
;
5094 if (h
->plt
.refcount
> 0)
5097 if (r_type
== R_NIOS2_PCREL_LO
|| r_type
== R_NIOS2_PCREL_HA
5098 || r_type
== R_NIOS2_BFD_RELOC_32
)
5100 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
;
5121 /* Implement elf_backend_finish_dynamic_symbols:
5122 Finish up dynamic symbol handling. We set the contents of various
5123 dynamic sections here. */
5125 nios2_elf32_finish_dynamic_symbol (bfd
*output_bfd
,
5126 struct bfd_link_info
*info
,
5127 struct elf_link_hash_entry
*h
,
5128 Elf_Internal_Sym
*sym
)
5130 struct elf32_nios2_link_hash_table
*htab
;
5131 struct elf32_nios2_link_hash_entry
*eh
5132 = (struct elf32_nios2_link_hash_entry
*)h
;
5135 htab
= elf32_nios2_hash_table (info
);
5137 if (h
->plt
.offset
!= (bfd_vma
) -1)
5144 Elf_Internal_Rela rela
;
5146 bfd_vma got_address
;
5148 /* This symbol has an entry in the procedure linkage table. Set
5150 BFD_ASSERT (h
->dynindx
!= -1);
5151 splt
= htab
->root
.splt
;
5152 sgotplt
= htab
->root
.sgotplt
;
5153 srela
= htab
->root
.srelplt
;
5154 BFD_ASSERT (splt
!= NULL
&& sgotplt
!= NULL
&& srela
!= NULL
);
5156 /* Emit the PLT entry. */
5157 if (bfd_link_pic (info
))
5159 nios2_elf32_install_data (splt
, nios2_so_plt_entry
, h
->plt
.offset
,
5161 plt_index
= (h
->plt
.offset
- 24) / 12;
5162 got_offset
= (plt_index
+ 3) * 4;
5163 nios2_elf32_install_imm16 (splt
, h
->plt
.offset
,
5164 hiadj(plt_index
* 4));
5165 nios2_elf32_install_imm16 (splt
, h
->plt
.offset
+ 4,
5166 (plt_index
* 4) & 0xffff);
5167 nios2_elf32_install_imm16 (splt
, h
->plt
.offset
+ 8,
5168 0xfff4 - h
->plt
.offset
);
5169 got_address
= (sgotplt
->output_section
->vma
+ sgotplt
->output_offset
5172 /* Fill in the entry in the global offset table. There are no
5173 res_n slots for a shared object PLT, instead the .got.plt entries
5174 point to the PLT entries. */
5175 bfd_put_32 (output_bfd
,
5176 splt
->output_section
->vma
+ splt
->output_offset
5177 + h
->plt
.offset
, sgotplt
->contents
+ got_offset
);
5181 plt_index
= (h
->plt
.offset
- 28 - htab
->res_n_size
) / 12;
5182 got_offset
= (plt_index
+ 3) * 4;
5184 nios2_elf32_install_data (splt
, nios2_plt_entry
, h
->plt
.offset
, 3);
5185 got_address
= (sgotplt
->output_section
->vma
+ sgotplt
->output_offset
5187 nios2_elf32_install_imm16 (splt
, h
->plt
.offset
, hiadj(got_address
));
5188 nios2_elf32_install_imm16 (splt
, h
->plt
.offset
+ 4,
5189 got_address
& 0xffff);
5191 /* Fill in the entry in the global offset table. */
5192 bfd_put_32 (output_bfd
,
5193 splt
->output_section
->vma
+ splt
->output_offset
5194 + plt_index
* 4, sgotplt
->contents
+ got_offset
);
5197 /* Fill in the entry in the .rela.plt section. */
5198 rela
.r_offset
= got_address
;
5199 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_NIOS2_JUMP_SLOT
);
5201 loc
= srela
->contents
+ plt_index
* sizeof (Elf32_External_Rela
);
5202 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
5204 if (!h
->def_regular
)
5206 /* Mark the symbol as undefined, rather than as defined in
5207 the .plt section. Leave the value alone. */
5208 sym
->st_shndx
= SHN_UNDEF
;
5209 /* If the symbol is weak, we do need to clear the value.
5210 Otherwise, the PLT entry would provide a definition for
5211 the symbol even if the symbol wasn't defined anywhere,
5212 and so the symbol would never be NULL. */
5213 if (!h
->ref_regular_nonweak
)
5218 use_plt
= (eh
->got_types_used
== CALL_USED
5219 && h
->plt
.offset
!= (bfd_vma
) -1);
5221 if (!use_plt
&& h
->got
.offset
!= (bfd_vma
) -1
5222 && (elf32_nios2_hash_entry (h
)->tls_type
& GOT_TLS_GD
) == 0
5223 && (elf32_nios2_hash_entry (h
)->tls_type
& GOT_TLS_IE
) == 0)
5227 Elf_Internal_Rela rela
;
5231 /* This symbol has an entry in the global offset table. Set it
5233 sgot
= htab
->root
.sgot
;
5234 srela
= htab
->root
.srelgot
;
5235 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
5237 offset
= (h
->got
.offset
& ~(bfd_vma
) 1);
5238 rela
.r_offset
= (sgot
->output_section
->vma
5239 + sgot
->output_offset
+ offset
);
5241 /* If this is a -Bsymbolic link, and the symbol is defined
5242 locally, we just want to emit a RELATIVE reloc. Likewise if
5243 the symbol was forced to be local because of a version file.
5244 The entry in the global offset table will already have been
5245 initialized in the relocate_section function. */
5247 if (bfd_link_pic (info
) && SYMBOL_REFERENCES_LOCAL (info
, h
))
5249 rela
.r_info
= ELF32_R_INFO (0, R_NIOS2_RELATIVE
);
5250 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
5251 (sgot
->contents
+ offset
));
5252 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
+ offset
);
5256 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5257 sgot
->contents
+ offset
);
5258 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_NIOS2_GLOB_DAT
);
5262 loc
= srela
->contents
;
5263 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
5264 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
5267 if (use_plt
&& h
->got
.offset
!= (bfd_vma
) -1)
5269 bfd_vma offset
= (h
->got
.offset
& ~(bfd_vma
) 1);
5270 asection
*sgot
= htab
->root
.sgot
;
5271 asection
*splt
= htab
->root
.splt
;
5272 bfd_put_32 (output_bfd
, (splt
->output_section
->vma
+ splt
->output_offset
5274 sgot
->contents
+ offset
);
5280 Elf_Internal_Rela rela
;
5283 /* This symbol needs a copy reloc. Set it up. */
5284 BFD_ASSERT (h
->dynindx
!= -1
5285 && (h
->root
.type
== bfd_link_hash_defined
5286 || h
->root
.type
== bfd_link_hash_defweak
));
5289 BFD_ASSERT (s
!= NULL
);
5291 rela
.r_offset
= (h
->root
.u
.def
.value
5292 + h
->root
.u
.def
.section
->output_section
->vma
5293 + h
->root
.u
.def
.section
->output_offset
);
5294 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_NIOS2_COPY
);
5296 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
5297 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
5300 /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */
5301 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
5302 || h
== elf_hash_table (info
)->hgot
5303 || h
== elf32_nios2_hash_table (info
)->h_gp_got
)
5304 sym
->st_shndx
= SHN_ABS
;
5309 /* Implement elf_backend_finish_dynamic_sections. */
5311 nios2_elf32_finish_dynamic_sections (bfd
*output_bfd
,
5312 struct bfd_link_info
*info
)
5317 struct elf32_nios2_link_hash_table
*htab
;
5319 htab
= elf32_nios2_hash_table (info
);
5320 dynobj
= elf_hash_table (info
)->dynobj
;
5321 sgotplt
= htab
->root
.sgotplt
;
5322 BFD_ASSERT (sgotplt
!= NULL
);
5323 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5325 if (elf_hash_table (info
)->dynamic_sections_created
)
5328 Elf32_External_Dyn
*dyncon
, *dynconend
;
5330 splt
= htab
->root
.splt
;
5331 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
5333 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5334 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5335 for (; dyncon
< dynconend
; dyncon
++)
5337 Elf_Internal_Dyn dyn
;
5340 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5348 s
= htab
->root
.sgotplt
;
5349 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5350 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5354 s
= htab
->root
.srelplt
;
5355 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5356 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5360 s
= htab
->root
.srelplt
;
5361 dyn
.d_un
.d_val
= s
->size
;
5362 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5366 /* The procedure linkage table relocs (DT_JMPREL) should
5367 not be included in the overall relocs (DT_RELA).
5368 Therefore, we override the DT_RELASZ entry here to
5369 make it not include the JMPREL relocs. Since the
5370 linker script arranges for .rela.plt to follow all
5371 other relocation sections, we don't have to worry
5372 about changing the DT_RELA entry. */
5373 s
= htab
->root
.srelplt
;
5375 dyn
.d_un
.d_val
-= s
->size
;
5376 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5380 s
= htab
->root
.sgotplt
;
5382 = s
->output_section
->vma
+ s
->output_offset
+ 0x7ff0;
5383 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5388 /* Fill in the first entry in the procedure linkage table. */
5391 bfd_vma got_address
= (sgotplt
->output_section
->vma
5392 + sgotplt
->output_offset
);
5393 if (bfd_link_pic (info
))
5395 bfd_vma got_pcrel
= got_address
- (splt
->output_section
->vma
5396 + splt
->output_offset
);
5397 /* Both GOT and PLT must be aligned to a 16-byte boundary
5398 for the two loads to share the %hiadj part. The 4-byte
5399 offset for nextpc is accounted for in the %lo offsets
5401 BFD_ASSERT ((got_pcrel
& 0xf) == 0);
5402 nios2_elf32_install_data (splt
, nios2_so_plt0_entry
, 0, 6);
5403 nios2_elf32_install_imm16 (splt
, 4, hiadj (got_pcrel
));
5404 nios2_elf32_install_imm16 (splt
, 12, got_pcrel
& 0xffff);
5405 nios2_elf32_install_imm16 (splt
, 16, (got_pcrel
+ 4) & 0xffff);
5409 /* Divide by 4 here, not 3 because we already corrected for the
5411 bfd_vma res_size
= (splt
->size
- 28) / 4;
5412 bfd_vma res_start
= (splt
->output_section
->vma
5413 + splt
->output_offset
);
5416 for (res_offset
= 0; res_offset
< res_size
; res_offset
+= 4)
5417 bfd_put_32 (output_bfd
,
5418 6 | ((res_size
- (res_offset
+ 4)) << 6),
5419 splt
->contents
+ res_offset
);
5421 /* The GOT must be aligned to a 16-byte boundary for the
5422 two loads to share the same %hiadj part. */
5423 BFD_ASSERT ((got_address
& 0xf) == 0);
5425 nios2_elf32_install_data (splt
, nios2_plt0_entry
, res_size
, 7);
5426 nios2_elf32_install_imm16 (splt
, res_size
, hiadj (res_start
));
5427 nios2_elf32_install_imm16 (splt
, res_size
+ 4,
5428 res_start
& 0xffff);
5429 nios2_elf32_install_imm16 (splt
, res_size
+ 12,
5430 hiadj (got_address
));
5431 nios2_elf32_install_imm16 (splt
, res_size
+ 16,
5432 (got_address
+ 4) & 0xffff);
5433 nios2_elf32_install_imm16 (splt
, res_size
+ 20,
5434 (got_address
+ 8) & 0xffff);
5438 /* Fill in the first three entries in the global offset table. */
5439 if (sgotplt
->size
> 0)
5442 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgotplt
->contents
);
5444 bfd_put_32 (output_bfd
,
5445 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5447 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgotplt
->contents
+ 4);
5448 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgotplt
->contents
+ 8);
5451 elf_section_data (sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5456 /* Implement elf_backend_adjust_dynamic_symbol:
5457 Adjust a symbol defined by a dynamic object and referenced by a
5458 regular object. The current definition is in some section of the
5459 dynamic object, but we're not including those sections. We have to
5460 change the definition to something the rest of the link can
5463 nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info
*info
,
5464 struct elf_link_hash_entry
*h
)
5466 struct elf32_nios2_link_hash_table
*htab
;
5471 htab
= elf32_nios2_hash_table (info
);
5472 dynobj
= elf_hash_table (info
)->dynobj
;
5474 /* Make sure we know what is going on here. */
5475 BFD_ASSERT (dynobj
!= NULL
5477 || h
->u
.weakdef
!= NULL
5480 && !h
->def_regular
)));
5482 /* If this is a function, put it in the procedure linkage table. We
5483 will fill in the contents of the procedure linkage table later,
5484 when we know the address of the .got section. */
5485 if (h
->type
== STT_FUNC
|| h
->needs_plt
)
5487 if (h
->plt
.refcount
<= 0
5488 || SYMBOL_CALLS_LOCAL (info
, h
)
5489 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
5490 && h
->root
.type
== bfd_link_hash_undefweak
))
5492 /* This case can occur if we saw a PLT reloc in an input
5493 file, but the symbol was never referred to by a dynamic
5494 object, or if all references were garbage collected. In
5495 such a case, we don't actually need to build a procedure
5496 linkage table, and we can just do a PCREL reloc instead. */
5497 h
->plt
.offset
= (bfd_vma
) -1;
5504 /* Reinitialize the plt offset now that it is not used as a reference
5506 h
->plt
.offset
= (bfd_vma
) -1;
5508 /* If this is a weak symbol, and there is a real definition, the
5509 processor independent code will have arranged for us to see the
5510 real definition first, and we can just use the same value. */
5511 if (h
->u
.weakdef
!= NULL
)
5513 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
5514 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
5515 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
5516 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
5520 /* If there are no non-GOT references, we do not need a copy
5522 if (!h
->non_got_ref
)
5525 /* This is a reference to a symbol defined by a dynamic object which
5527 If we are creating a shared library, we must presume that the
5528 only references to the symbol are via the global offset table.
5529 For such cases we need not do anything here; the relocations will
5530 be handled correctly by relocate_section. */
5531 if (bfd_link_pic (info
))
5536 _bfd_error_handler (_("dynamic variable `%s' is zero size"),
5537 h
->root
.root
.string
);
5541 /* We must allocate the symbol in our .dynbss section, which will
5542 become part of the .bss section of the executable. There will be
5543 an entry for this symbol in the .dynsym section. The dynamic
5544 object will contain position independent code, so all references
5545 from the dynamic object to this symbol will go through the global
5546 offset table. The dynamic linker will use the .dynsym entry to
5547 determine the address it must put in the global offset table, so
5548 both the dynamic object and the regular object will refer to the
5549 same memory location for the variable. */
5551 BFD_ASSERT (s
!= NULL
);
5553 /* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to
5554 copy the initial value out of the dynamic object and into the
5555 runtime process image. We need to remember the offset into the
5556 .rela.bss section we are going to use. */
5557 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5561 srel
= htab
->srelbss
;
5562 BFD_ASSERT (srel
!= NULL
);
5563 srel
->size
+= sizeof (Elf32_External_Rela
);
5567 align2
= bfd_log2 (h
->size
);
5568 if (align2
> h
->root
.u
.def
.section
->alignment_power
)
5569 align2
= h
->root
.u
.def
.section
->alignment_power
;
5572 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
)1 << align2
);
5573 if (align2
> bfd_get_section_alignment (dynobj
, s
)
5574 && !bfd_set_section_alignment (dynobj
, s
, align2
))
5577 /* Define the symbol as being at this point in the section. */
5578 h
->root
.u
.def
.section
= s
;
5579 h
->root
.u
.def
.value
= s
->size
;
5581 /* Increment the section size to make room for the symbol. */
5587 /* Worker function for nios2_elf32_size_dynamic_sections. */
5589 adjust_dynrelocs (struct elf_link_hash_entry
*h
, PTR inf
)
5591 struct bfd_link_info
*info
;
5592 struct elf32_nios2_link_hash_table
*htab
;
5594 if (h
->root
.type
== bfd_link_hash_indirect
)
5597 if (h
->root
.type
== bfd_link_hash_warning
)
5598 /* When warning symbols are created, they **replace** the "real"
5599 entry in the hash table, thus we never get to see the real
5600 symbol in a hash traversal. So look at it now. */
5601 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5603 info
= (struct bfd_link_info
*) inf
;
5604 htab
= elf32_nios2_hash_table (info
);
5606 if (h
->plt
.offset
!= (bfd_vma
)-1)
5607 h
->plt
.offset
+= htab
->res_n_size
;
5608 if (htab
->root
.splt
== h
->root
.u
.def
.section
)
5609 h
->root
.u
.def
.value
+= htab
->res_n_size
;
5614 /* Another worker function for nios2_elf32_size_dynamic_sections.
5615 Allocate space in .plt, .got and associated reloc sections for
5618 allocate_dynrelocs (struct elf_link_hash_entry
*h
, PTR inf
)
5620 struct bfd_link_info
*info
;
5621 struct elf32_nios2_link_hash_table
*htab
;
5622 struct elf32_nios2_link_hash_entry
*eh
;
5623 struct elf32_nios2_dyn_relocs
*p
;
5626 if (h
->root
.type
== bfd_link_hash_indirect
)
5629 if (h
->root
.type
== bfd_link_hash_warning
)
5630 /* When warning symbols are created, they **replace** the "real"
5631 entry in the hash table, thus we never get to see the real
5632 symbol in a hash traversal. So look at it now. */
5633 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5635 info
= (struct bfd_link_info
*) inf
;
5636 htab
= elf32_nios2_hash_table (info
);
5638 if (htab
->root
.dynamic_sections_created
5639 && h
->plt
.refcount
> 0)
5641 /* Make sure this symbol is output as a dynamic symbol.
5642 Undefined weak syms won't yet be marked as dynamic. */
5643 if (h
->dynindx
== -1
5645 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
5648 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), h
))
5650 asection
*s
= htab
->root
.splt
;
5652 /* Allocate room for the header. */
5655 if (bfd_link_pic (info
))
5661 h
->plt
.offset
= s
->size
;
5663 /* If this symbol is not defined in a regular file, and we are
5664 not generating a shared library, then set the symbol to this
5665 location in the .plt. This is required to make function
5666 pointers compare as equal between the normal executable and
5667 the shared library. */
5668 if (! bfd_link_pic (info
)
5671 h
->root
.u
.def
.section
= s
;
5672 h
->root
.u
.def
.value
= h
->plt
.offset
;
5675 /* Make room for this entry. */
5678 /* We also need to make an entry in the .rela.plt section. */
5679 htab
->root
.srelplt
->size
+= sizeof (Elf32_External_Rela
);
5681 /* And the .got.plt section. */
5682 htab
->root
.sgotplt
->size
+= 4;
5686 h
->plt
.offset
= (bfd_vma
) -1;
5692 h
->plt
.offset
= (bfd_vma
) -1;
5696 eh
= (struct elf32_nios2_link_hash_entry
*) h
;
5697 use_plt
= (eh
->got_types_used
== CALL_USED
5698 && h
->plt
.offset
!= (bfd_vma
) -1);
5700 if (h
->got
.refcount
> 0)
5704 int tls_type
= eh
->tls_type
;
5707 /* Make sure this symbol is output as a dynamic symbol.
5708 Undefined weak syms won't yet be marked as dynamic. */
5709 if (h
->dynindx
== -1
5711 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
5714 s
= htab
->root
.sgot
;
5715 h
->got
.offset
= s
->size
;
5717 if (tls_type
== GOT_UNKNOWN
)
5720 if (tls_type
== GOT_NORMAL
)
5721 /* Non-TLS symbols need one GOT slot. */
5725 if (tls_type
& GOT_TLS_GD
)
5726 /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */
5728 if (tls_type
& GOT_TLS_IE
)
5729 /* R_NIOS2_TLS_IE16 needs one GOT slot. */
5733 dyn
= htab
->root
.dynamic_sections_created
;
5736 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, bfd_link_pic (info
), h
)
5737 && (!bfd_link_pic (info
)
5738 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
5741 if (tls_type
!= GOT_NORMAL
5742 && (bfd_link_pic (info
) || indx
!= 0)
5743 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5744 || h
->root
.type
!= bfd_link_hash_undefweak
))
5746 if (tls_type
& GOT_TLS_IE
)
5747 htab
->root
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
5749 if (tls_type
& GOT_TLS_GD
)
5750 htab
->root
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
5752 if ((tls_type
& GOT_TLS_GD
) && indx
!= 0)
5753 htab
->root
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
5755 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5756 || h
->root
.type
!= bfd_link_hash_undefweak
)
5758 && (bfd_link_pic (info
)
5759 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
5760 htab
->root
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
5763 h
->got
.offset
= (bfd_vma
) -1;
5765 if (eh
->dyn_relocs
== NULL
)
5768 /* In the shared -Bsymbolic case, discard space allocated for
5769 dynamic pc-relative relocs against symbols which turn out to be
5770 defined in regular objects. For the normal shared case, discard
5771 space for pc-relative relocs that have become local due to symbol
5772 visibility changes. */
5774 if (bfd_link_pic (info
))
5777 && (h
->forced_local
|| SYMBOLIC_BIND (info
, h
)))
5779 struct elf32_nios2_dyn_relocs
**pp
;
5781 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
5783 p
->count
-= p
->pc_count
;
5792 /* Also discard relocs on undefined weak syms with non-default
5794 if (eh
->dyn_relocs
!= NULL
5795 && h
->root
.type
== bfd_link_hash_undefweak
)
5797 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5798 eh
->dyn_relocs
= NULL
;
5800 /* Make sure undefined weak symbols are output as a dynamic
5802 else if (h
->dynindx
== -1
5804 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
5810 /* For the non-shared case, discard space for relocs against
5811 symbols which turn out to need copy relocs or are not
5815 && ((h
->def_dynamic
&& !h
->def_regular
)
5816 || (htab
->root
.dynamic_sections_created
5817 && (h
->root
.type
== bfd_link_hash_undefweak
5818 || h
->root
.type
== bfd_link_hash_undefined
))))
5820 /* Make sure this symbol is output as a dynamic symbol.
5821 Undefined weak syms won't yet be marked as dynamic. */
5822 if (h
->dynindx
== -1
5824 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
5827 /* If that succeeded, we know we'll be keeping all the
5829 if (h
->dynindx
!= -1)
5833 eh
->dyn_relocs
= NULL
;
5838 /* Finally, allocate space. */
5839 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
5841 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
5842 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
5848 /* Implement elf_backend_size_dynamic_sections:
5849 Set the sizes of the dynamic sections. */
5851 nios2_elf32_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
5852 struct bfd_link_info
*info
)
5860 struct elf32_nios2_link_hash_table
*htab
;
5862 htab
= elf32_nios2_hash_table (info
);
5863 dynobj
= elf_hash_table (info
)->dynobj
;
5864 BFD_ASSERT (dynobj
!= NULL
);
5866 htab
->res_n_size
= 0;
5867 if (elf_hash_table (info
)->dynamic_sections_created
)
5869 /* Set the contents of the .interp section to the interpreter. */
5870 if (bfd_link_executable (info
) && !info
->nointerp
)
5872 s
= bfd_get_linker_section (dynobj
, ".interp");
5873 BFD_ASSERT (s
!= NULL
);
5874 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
5875 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
5880 /* We may have created entries in the .rela.got section.
5881 However, if we are not creating the dynamic sections, we will
5882 not actually use these entries. Reset the size of .rela.got,
5883 which will cause it to get stripped from the output file
5885 s
= htab
->root
.srelgot
;
5890 /* Set up .got offsets for local syms, and space for local dynamic
5892 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
5894 bfd_signed_vma
*local_got
;
5895 bfd_signed_vma
*end_local_got
;
5896 char *local_tls_type
;
5897 bfd_size_type locsymcount
;
5898 Elf_Internal_Shdr
*symtab_hdr
;
5901 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
5904 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
5906 struct elf32_nios2_dyn_relocs
*p
;
5908 for (p
= elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
5910 if (!bfd_is_abs_section (p
->sec
)
5911 && bfd_is_abs_section (p
->sec
->output_section
))
5913 /* Input section has been discarded, either because
5914 it is a copy of a linkonce section or due to
5915 linker script /DISCARD/, so we'll be discarding
5918 else if (p
->count
!= 0)
5920 srel
= elf_section_data (p
->sec
)->sreloc
;
5921 srel
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
5922 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
5923 info
->flags
|= DF_TEXTREL
;
5928 local_got
= elf_local_got_refcounts (ibfd
);
5932 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
5933 locsymcount
= symtab_hdr
->sh_info
;
5934 end_local_got
= local_got
+ locsymcount
;
5935 local_tls_type
= elf32_nios2_local_got_tls_type (ibfd
);
5936 s
= htab
->root
.sgot
;
5937 srel
= htab
->root
.srelgot
;
5938 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
5942 *local_got
= s
->size
;
5943 if (*local_tls_type
& GOT_TLS_GD
)
5944 /* TLS_GD relocs need an 8-byte structure in the GOT. */
5946 if (*local_tls_type
& GOT_TLS_IE
)
5948 if (*local_tls_type
== GOT_NORMAL
)
5951 if (bfd_link_pic (info
) || *local_tls_type
== GOT_TLS_GD
)
5952 srel
->size
+= sizeof (Elf32_External_Rela
);
5955 *local_got
= (bfd_vma
) -1;
5959 if (htab
->tls_ldm_got
.refcount
> 0)
5961 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5962 for R_NIOS2_TLS_LDM16 relocations. */
5963 htab
->tls_ldm_got
.offset
= htab
->root
.sgot
->size
;
5964 htab
->root
.sgot
->size
+= 8;
5965 if (bfd_link_pic (info
))
5966 htab
->root
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
5969 htab
->tls_ldm_got
.offset
= -1;
5971 /* Allocate global sym .plt and .got entries, and space for global
5972 sym dynamic relocs. */
5973 elf_link_hash_traverse (& htab
->root
, allocate_dynrelocs
, info
);
5975 if (elf_hash_table (info
)->dynamic_sections_created
)
5977 /* If the .got section is more than 0x8000 bytes, we add
5978 0x8000 to the value of _gp_got, so that 16-bit relocations
5979 have a greater chance of working. */
5980 if (htab
->root
.sgot
->size
>= 0x8000
5981 && elf32_nios2_hash_table (info
)->h_gp_got
->root
.u
.def
.value
== 0)
5982 elf32_nios2_hash_table (info
)->h_gp_got
->root
.u
.def
.value
= 0x8000;
5985 /* The check_relocs and adjust_dynamic_symbol entry points have
5986 determined the sizes of the various dynamic sections. Allocate
5991 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
5995 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
5998 /* It's OK to base decisions on the section name, because none
5999 of the dynobj section names depend upon the input files. */
6000 name
= bfd_get_section_name (dynobj
, s
);
6002 if (strcmp (name
, ".plt") == 0)
6004 /* Remember whether there is a PLT. */
6007 /* Correct for the number of res_N branches. */
6008 if (plt
&& !bfd_link_pic (info
))
6010 htab
->res_n_size
= (s
->size
-28) / 3;
6011 s
->size
+= htab
->res_n_size
;
6014 else if (CONST_STRNEQ (name
, ".rela"))
6020 /* We use the reloc_count field as a counter if we need
6021 to copy relocs into the output file. */
6025 else if (CONST_STRNEQ (name
, ".got"))
6027 else if (strcmp (name
, ".dynbss") != 0)
6028 /* It's not one of our sections, so don't allocate space. */
6033 /* If we don't need this section, strip it from the
6034 output file. This is mostly to handle .rela.bss and
6035 .rela.plt. We must create both sections in
6036 create_dynamic_sections, because they must be created
6037 before the linker maps input sections to output
6038 sections. The linker does that before
6039 adjust_dynamic_symbol is called, and it is that
6040 function which decides whether anything needs to go
6041 into these sections. */
6042 s
->flags
|= SEC_EXCLUDE
;
6046 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
6049 /* Allocate memory for the section contents. */
6050 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
6051 Unused entries should be reclaimed before the section's contents
6052 are written out, but at the moment this does not happen. Thus in
6053 order to prevent writing out garbage, we initialize the section's
6054 contents to zero. */
6055 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
6056 if (s
->contents
== NULL
)
6060 /* Adjust dynamic symbols that point to the plt to account for the
6061 now-known number of resN slots. */
6062 if (htab
->res_n_size
)
6063 elf_link_hash_traverse (& htab
->root
, adjust_dynrelocs
, info
);
6065 if (elf_hash_table (info
)->dynamic_sections_created
)
6067 /* Add some entries to the .dynamic section. We fill in the
6068 values later, in elf_nios2_finish_dynamic_sections, but we
6069 must add the entries now so that we get the correct size for
6070 the .dynamic section. The DT_DEBUG entry is filled in by the
6071 dynamic linker and used by the debugger. */
6072 #define add_dynamic_entry(TAG, VAL) \
6073 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6075 if (!bfd_link_pic (info
) && !add_dynamic_entry (DT_DEBUG
, 0))
6078 if (got
&& !add_dynamic_entry (DT_PLTGOT
, 0))
6082 && (!add_dynamic_entry (DT_PLTRELSZ
, 0)
6083 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
6084 || !add_dynamic_entry (DT_JMPREL
, 0)))
6088 && (!add_dynamic_entry (DT_RELA
, 0)
6089 || !add_dynamic_entry (DT_RELASZ
, 0)
6090 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
))))
6093 if (!bfd_link_pic (info
) && !add_dynamic_entry (DT_NIOS2_GP
, 0))
6096 if ((info
->flags
& DF_TEXTREL
) != 0
6097 && !add_dynamic_entry (DT_TEXTREL
, 0))
6100 #undef add_dynamic_entry
6105 /* Free the derived linker hash table. */
6107 nios2_elf32_link_hash_table_free (bfd
*obfd
)
6109 struct elf32_nios2_link_hash_table
*htab
6110 = (struct elf32_nios2_link_hash_table
*) obfd
->link
.hash
;
6112 bfd_hash_table_free (&htab
->bstab
);
6113 _bfd_elf_link_hash_table_free (obfd
);
6116 /* Implement bfd_elf32_bfd_link_hash_table_create. */
6117 static struct bfd_link_hash_table
*
6118 nios2_elf32_link_hash_table_create (bfd
*abfd
)
6120 struct elf32_nios2_link_hash_table
*ret
;
6121 bfd_size_type amt
= sizeof (struct elf32_nios2_link_hash_table
);
6123 ret
= bfd_zmalloc (amt
);
6127 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
6130 elf32_nios2_link_hash_entry
),
6137 /* Init the stub hash table too. */
6138 if (!bfd_hash_table_init (&ret
->bstab
, stub_hash_newfunc
,
6139 sizeof (struct elf32_nios2_stub_hash_entry
)))
6141 _bfd_elf_link_hash_table_free (abfd
);
6144 ret
->root
.root
.hash_table_free
= nios2_elf32_link_hash_table_free
;
6146 return &ret
->root
.root
;
6149 /* Implement elf_backend_reloc_type_class. */
6150 static enum elf_reloc_type_class
6151 nios2_elf32_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
6152 const asection
*rel_sec ATTRIBUTE_UNUSED
,
6153 const Elf_Internal_Rela
*rela
)
6155 switch ((int) ELF32_R_TYPE (rela
->r_info
))
6157 case R_NIOS2_RELATIVE
:
6158 return reloc_class_relative
;
6159 case R_NIOS2_JUMP_SLOT
:
6160 return reloc_class_plt
;
6162 return reloc_class_copy
;
6164 return reloc_class_normal
;
6168 /* Return 1 if target is one of ours. */
6170 is_nios2_elf_target (const struct bfd_target
*targ
)
6172 return (targ
== &nios2_elf32_le_vec
6173 || targ
== &nios2_elf32_be_vec
);
6176 /* Implement elf_backend_add_symbol_hook.
6177 This hook is called by the linker when adding symbols from an object
6178 file. We use it to put .comm items in .sbss, and not .bss. */
6180 nios2_elf_add_symbol_hook (bfd
*abfd
,
6181 struct bfd_link_info
*info
,
6182 Elf_Internal_Sym
*sym
,
6183 const char **namep ATTRIBUTE_UNUSED
,
6184 flagword
*flagsp ATTRIBUTE_UNUSED
,
6190 if (sym
->st_shndx
== SHN_COMMON
6191 && !bfd_link_relocatable (info
)
6192 && sym
->st_size
<= elf_gp_size (abfd
)
6193 && is_nios2_elf_target (info
->output_bfd
->xvec
))
6195 /* Common symbols less than or equal to -G nn bytes are automatically
6197 struct elf32_nios2_link_hash_table
*htab
;
6199 htab
= elf32_nios2_hash_table (info
);
6200 if (htab
->sbss
== NULL
)
6202 flagword flags
= SEC_IS_COMMON
| SEC_LINKER_CREATED
;
6204 dynobj
= elf_hash_table (info
)->dynobj
;
6208 htab
->sbss
= bfd_make_section_anyway_with_flags (dynobj
, ".sbss",
6210 if (htab
->sbss
== NULL
)
6215 *valp
= sym
->st_size
;
6221 /* Implement elf_backend_can_make_relative_eh_frame:
6222 Decide whether to attempt to turn absptr or lsda encodings in
6223 shared libraries into pcrel within the given input section. */
6225 nios2_elf32_can_make_relative_eh_frame (bfd
*input_bfd ATTRIBUTE_UNUSED
,
6226 struct bfd_link_info
*info
6228 asection
*eh_frame_section
6231 /* We can't use PC-relative encodings in the .eh_frame section. */
6235 /* Implement elf_backend_special_sections. */
6236 const struct bfd_elf_special_section elf32_nios2_special_sections
[] =
6238 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS
,
6239 SHF_ALLOC
+ SHF_WRITE
+ SHF_NIOS2_GPREL
},
6240 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS
,
6241 SHF_ALLOC
+ SHF_WRITE
+ SHF_NIOS2_GPREL
},
6242 { NULL
, 0, 0, 0, 0 }
6245 #define ELF_ARCH bfd_arch_nios2
6246 #define ELF_TARGET_ID NIOS2_ELF_DATA
6247 #define ELF_MACHINE_CODE EM_ALTERA_NIOS2
6249 /* The Nios II MMU uses a 4K page size. */
6251 #define ELF_MAXPAGESIZE 0x1000
6253 #define bfd_elf32_bfd_link_hash_table_create \
6254 nios2_elf32_link_hash_table_create
6256 #define bfd_elf32_bfd_merge_private_bfd_data \
6257 nios2_elf32_merge_private_bfd_data
6259 /* Relocation table lookup macros. */
6261 #define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup
6262 #define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup
6264 /* JUMP_TABLE_LINK macros. */
6266 /* elf_info_to_howto (using RELA relocations). */
6268 #define elf_info_to_howto nios2_elf32_info_to_howto
6270 /* elf backend functions. */
6272 #define elf_backend_can_gc_sections 1
6273 #define elf_backend_can_refcount 1
6274 #define elf_backend_plt_readonly 1
6275 #define elf_backend_want_got_plt 1
6276 #define elf_backend_rela_normal 1
6278 #define elf_backend_relocate_section nios2_elf32_relocate_section
6279 #define elf_backend_section_flags nios2_elf32_section_flags
6280 #define elf_backend_fake_sections nios2_elf32_fake_sections
6281 #define elf_backend_check_relocs nios2_elf32_check_relocs
6283 #define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook
6284 #define elf_backend_gc_sweep_hook nios2_elf32_gc_sweep_hook
6285 #define elf_backend_create_dynamic_sections \
6286 nios2_elf32_create_dynamic_sections
6287 #define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol
6288 #define elf_backend_finish_dynamic_sections \
6289 nios2_elf32_finish_dynamic_sections
6290 #define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol
6291 #define elf_backend_reloc_type_class nios2_elf32_reloc_type_class
6292 #define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections
6293 #define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook
6294 #define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol
6295 #define elf_backend_object_p nios2_elf32_object_p
6297 #define elf_backend_grok_prstatus nios2_grok_prstatus
6298 #define elf_backend_grok_psinfo nios2_grok_psinfo
6300 #undef elf_backend_can_make_relative_eh_frame
6301 #define elf_backend_can_make_relative_eh_frame \
6302 nios2_elf32_can_make_relative_eh_frame
6304 #define elf_backend_special_sections elf32_nios2_special_sections
6306 #define TARGET_LITTLE_SYM nios2_elf32_le_vec
6307 #define TARGET_LITTLE_NAME "elf32-littlenios2"
6308 #define TARGET_BIG_SYM nios2_elf32_be_vec
6309 #define TARGET_BIG_NAME "elf32-bignios2"
6311 #define elf_backend_got_header_size 12
6312 #define elf_backend_default_execstack 0
6314 #include "elf32-target.h"