1 /* 32-bit ELF support for Nios II.
2 Copyright (C) 2012-2018 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"
34 #include "libiberty.h"
36 /* Use RELA relocations. */
45 /* Forward declarations. */
46 static bfd_reloc_status_type nios2_elf32_ignore_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type nios2_elf32_hi16_relocate
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type nios2_elf32_lo16_relocate
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type nios2_elf32_hiadj16_relocate
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate
57 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
58 static bfd_reloc_status_type nios2_elf32_pcrel16_relocate
59 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
60 static bfd_reloc_status_type nios2_elf32_call26_relocate
61 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
62 static bfd_reloc_status_type nios2_elf32_gprel_relocate
63 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
64 static bfd_reloc_status_type nios2_elf32_ujmp_relocate
65 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
66 static bfd_reloc_status_type nios2_elf32_cjmp_relocate
67 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
68 static bfd_reloc_status_type nios2_elf32_callr_relocate
69 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
72 extern const bfd_target nios2_elf32_le_vec;
73 extern const bfd_target nios2_elf32_be_vec;
75 /* Offset of tp and dtp pointers from start of TLS block. */
76 #define TP_OFFSET 0x7000
77 #define DTP_OFFSET 0x8000
79 /* The relocation tables used for SHT_REL sections. There are separate
80 tables for R1 and R2 encodings. */
81 static reloc_howto_type elf_nios2_r1_howto_table_rel[] = {
83 HOWTO (R_NIOS2_NONE, /* type */
85 3, /* size (0 = byte, 1 = short, 2 = long) */
87 FALSE, /* pc_relative */
89 complain_overflow_dont, /* complain_on_overflow */
90 bfd_elf_generic_reloc, /* special_function */
91 "R_NIOS2_NONE", /* name */
92 FALSE, /* partial_inplace */
95 FALSE), /* pcrel_offset */
97 /* 16-bit signed immediate relocation. */
98 HOWTO (R_NIOS2_S16, /* type */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
102 FALSE, /* pc_relative */
104 complain_overflow_signed, /* complain on overflow */
105 bfd_elf_generic_reloc, /* special function */
106 "R_NIOS2_S16", /* name */
107 FALSE, /* partial_inplace */
108 0x003fffc0, /* src_mask */
109 0x003fffc0, /* dest_mask */
110 FALSE), /* pcrel_offset */
112 /* 16-bit unsigned immediate relocation. */
113 HOWTO (R_NIOS2_U16, /* type */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
117 FALSE, /* pc_relative */
119 complain_overflow_unsigned, /* complain on overflow */
120 bfd_elf_generic_reloc, /* special function */
121 "R_NIOS2_U16", /* name */
122 FALSE, /* partial_inplace */
123 0x003fffc0, /* src_mask */
124 0x003fffc0, /* dest_mask */
125 FALSE), /* pcrel_offset */
127 HOWTO (R_NIOS2_PCREL16, /* type */
129 2, /* size (0 = byte, 1 = short, 2 = long) */
131 TRUE, /* pc_relative */
133 complain_overflow_signed, /* complain on overflow */
134 nios2_elf32_pcrel16_relocate, /* special function */
135 "R_NIOS2_PCREL16", /* name */
136 FALSE, /* partial_inplace */
137 0x003fffc0, /* src_mask */
138 0x003fffc0, /* dest_mask */
139 TRUE), /* pcrel_offset */
141 HOWTO (R_NIOS2_CALL26, /* type */
143 2, /* size (0 = byte, 1 = short, 2 = long) */
145 FALSE, /* pc_relative */
147 complain_overflow_dont, /* complain on overflow */
148 nios2_elf32_call26_relocate, /* special function */
149 "R_NIOS2_CALL26", /* name */
150 FALSE, /* partial_inplace */
151 0xffffffc0, /* src_mask */
152 0xffffffc0, /* dst_mask */
153 FALSE), /* pcrel_offset */
161 complain_overflow_bitfield,
162 bfd_elf_generic_reloc,
169 HOWTO (R_NIOS2_CACHE_OPX,
175 complain_overflow_bitfield,
176 bfd_elf_generic_reloc,
189 complain_overflow_bitfield,
190 bfd_elf_generic_reloc,
203 complain_overflow_bitfield,
204 bfd_elf_generic_reloc,
217 complain_overflow_dont,
218 nios2_elf32_hi16_relocate,
231 complain_overflow_dont,
232 nios2_elf32_lo16_relocate,
239 HOWTO (R_NIOS2_HIADJ16,
245 complain_overflow_dont,
246 nios2_elf32_hiadj16_relocate,
253 HOWTO (R_NIOS2_BFD_RELOC_32,
259 complain_overflow_dont,
260 bfd_elf_generic_reloc,
261 "R_NIOS2_BFD_RELOC32",
267 HOWTO (R_NIOS2_BFD_RELOC_16,
273 complain_overflow_bitfield,
274 bfd_elf_generic_reloc,
275 "R_NIOS2_BFD_RELOC16",
281 HOWTO (R_NIOS2_BFD_RELOC_8,
287 complain_overflow_bitfield,
288 bfd_elf_generic_reloc,
289 "R_NIOS2_BFD_RELOC8",
295 HOWTO (R_NIOS2_GPREL,
301 complain_overflow_dont,
302 nios2_elf32_gprel_relocate,
309 HOWTO (R_NIOS2_GNU_VTINHERIT,
315 complain_overflow_dont,
317 "R_NIOS2_GNU_VTINHERIT",
323 HOWTO (R_NIOS2_GNU_VTENTRY,
329 complain_overflow_dont,
330 _bfd_elf_rel_vtable_reloc_fn,
331 "R_NIOS2_GNU_VTENTRY",
343 complain_overflow_dont,
344 nios2_elf32_ujmp_relocate,
357 complain_overflow_dont,
358 nios2_elf32_cjmp_relocate,
365 HOWTO (R_NIOS2_CALLR,
371 complain_overflow_dont,
372 nios2_elf32_callr_relocate,
379 HOWTO (R_NIOS2_ALIGN,
385 complain_overflow_dont,
386 nios2_elf32_ignore_reloc,
394 HOWTO (R_NIOS2_GOT16,
400 complain_overflow_bitfield,
401 bfd_elf_generic_reloc,
408 HOWTO (R_NIOS2_CALL16,
414 complain_overflow_bitfield,
415 bfd_elf_generic_reloc,
422 HOWTO (R_NIOS2_GOTOFF_LO,
428 complain_overflow_dont,
429 bfd_elf_generic_reloc,
436 HOWTO (R_NIOS2_GOTOFF_HA,
442 complain_overflow_dont,
443 bfd_elf_generic_reloc,
450 HOWTO (R_NIOS2_PCREL_LO,
456 complain_overflow_dont,
457 nios2_elf32_pcrel_lo16_relocate,
464 HOWTO (R_NIOS2_PCREL_HA,
468 FALSE, /* This is a PC-relative relocation, but we need to subtract
469 PC ourselves before the HIADJ. */
471 complain_overflow_dont,
472 nios2_elf32_pcrel_hiadj16_relocate,
479 HOWTO (R_NIOS2_TLS_GD16,
485 complain_overflow_bitfield,
486 bfd_elf_generic_reloc,
493 HOWTO (R_NIOS2_TLS_LDM16,
499 complain_overflow_bitfield,
500 bfd_elf_generic_reloc,
507 HOWTO (R_NIOS2_TLS_LDO16,
513 complain_overflow_bitfield,
514 bfd_elf_generic_reloc,
521 HOWTO (R_NIOS2_TLS_IE16,
527 complain_overflow_bitfield,
528 bfd_elf_generic_reloc,
535 HOWTO (R_NIOS2_TLS_LE16,
541 complain_overflow_bitfield,
542 bfd_elf_generic_reloc,
549 HOWTO (R_NIOS2_TLS_DTPMOD,
555 complain_overflow_dont,
556 bfd_elf_generic_reloc,
557 "R_NIOS2_TLS_DTPMOD",
563 HOWTO (R_NIOS2_TLS_DTPREL,
569 complain_overflow_dont,
570 bfd_elf_generic_reloc,
571 "R_NIOS2_TLS_DTPREL",
577 HOWTO (R_NIOS2_TLS_TPREL,
583 complain_overflow_dont,
584 bfd_elf_generic_reloc,
597 complain_overflow_dont,
598 bfd_elf_generic_reloc,
605 HOWTO (R_NIOS2_GLOB_DAT,
611 complain_overflow_dont,
612 bfd_elf_generic_reloc,
619 HOWTO (R_NIOS2_JUMP_SLOT,
625 complain_overflow_dont,
626 bfd_elf_generic_reloc,
633 HOWTO (R_NIOS2_RELATIVE,
639 complain_overflow_dont,
640 bfd_elf_generic_reloc,
647 HOWTO (R_NIOS2_GOTOFF,
653 complain_overflow_dont,
654 bfd_elf_generic_reloc,
661 HOWTO (R_NIOS2_CALL26_NOAT, /* type */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
665 FALSE, /* pc_relative */
667 complain_overflow_dont, /* complain on overflow */
668 nios2_elf32_call26_relocate, /* special function */
669 "R_NIOS2_CALL26_NOAT", /* name */
670 FALSE, /* partial_inplace */
671 0xffffffc0, /* src_mask */
672 0xffffffc0, /* dst_mask */
673 FALSE), /* pcrel_offset */
675 HOWTO (R_NIOS2_GOT_LO,
681 complain_overflow_dont,
682 bfd_elf_generic_reloc,
689 HOWTO (R_NIOS2_GOT_HA,
695 complain_overflow_dont,
696 bfd_elf_generic_reloc,
703 HOWTO (R_NIOS2_CALL_LO,
709 complain_overflow_dont,
710 bfd_elf_generic_reloc,
717 HOWTO (R_NIOS2_CALL_HA,
723 complain_overflow_dont,
724 bfd_elf_generic_reloc,
731 /* Add other relocations here. */
734 static reloc_howto_type elf_nios2_r2_howto_table_rel[] = {
736 HOWTO (R_NIOS2_NONE, /* type */
738 0, /* size (0 = byte, 1 = short, 2 = long) */
740 FALSE, /* pc_relative */
742 complain_overflow_dont, /* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 "R_NIOS2_NONE", /* name */
745 FALSE, /* partial_inplace */
748 FALSE), /* pcrel_offset */
750 /* 16-bit signed immediate relocation. */
751 HOWTO (R_NIOS2_S16, /* type */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
755 FALSE, /* pc_relative */
757 complain_overflow_signed, /* complain on overflow */
758 bfd_elf_generic_reloc, /* special function */
759 "R_NIOS2_S16", /* name */
760 FALSE, /* partial_inplace */
761 0xffff0000, /* src_mask */
762 0xffff0000, /* dest_mask */
763 FALSE), /* pcrel_offset */
765 /* 16-bit unsigned immediate relocation. */
766 HOWTO (R_NIOS2_U16, /* type */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
770 FALSE, /* pc_relative */
772 complain_overflow_unsigned, /* complain on overflow */
773 bfd_elf_generic_reloc, /* special function */
774 "R_NIOS2_U16", /* name */
775 FALSE, /* partial_inplace */
776 0xffff0000, /* src_mask */
777 0xffff0000, /* dest_mask */
778 FALSE), /* pcrel_offset */
780 HOWTO (R_NIOS2_PCREL16, /* type */
782 2, /* size (0 = byte, 1 = short, 2 = long) */
784 TRUE, /* pc_relative */
786 complain_overflow_signed, /* complain on overflow */
787 nios2_elf32_pcrel16_relocate, /* special function */
788 "R_NIOS2_PCREL16", /* name */
789 FALSE, /* partial_inplace */
790 0xffff0000, /* src_mask */
791 0xffff0000, /* dest_mask */
792 TRUE), /* pcrel_offset */
794 HOWTO (R_NIOS2_CALL26, /* type */
796 2, /* size (0 = byte, 1 = short, 2 = long) */
798 FALSE, /* pc_relative */
800 complain_overflow_dont, /* complain on overflow */
801 nios2_elf32_call26_relocate, /* special function */
802 "R_NIOS2_CALL26", /* name */
803 FALSE, /* partial_inplace */
804 0xffffffc0, /* src_mask */
805 0xffffffc0, /* dst_mask */
806 FALSE), /* pcrel_offset */
814 complain_overflow_bitfield,
815 bfd_elf_generic_reloc,
822 HOWTO (R_NIOS2_CACHE_OPX,
828 complain_overflow_bitfield,
829 bfd_elf_generic_reloc,
842 complain_overflow_bitfield,
843 bfd_elf_generic_reloc,
856 complain_overflow_bitfield,
857 bfd_elf_generic_reloc,
870 complain_overflow_dont,
871 nios2_elf32_hi16_relocate,
884 complain_overflow_dont,
885 nios2_elf32_lo16_relocate,
892 HOWTO (R_NIOS2_HIADJ16,
898 complain_overflow_dont,
899 nios2_elf32_hiadj16_relocate,
906 HOWTO (R_NIOS2_BFD_RELOC_32,
912 complain_overflow_dont,
913 bfd_elf_generic_reloc,
914 "R_NIOS2_BFD_RELOC32",
920 HOWTO (R_NIOS2_BFD_RELOC_16,
926 complain_overflow_bitfield,
927 bfd_elf_generic_reloc,
928 "R_NIOS2_BFD_RELOC16",
934 HOWTO (R_NIOS2_BFD_RELOC_8,
940 complain_overflow_bitfield,
941 bfd_elf_generic_reloc,
942 "R_NIOS2_BFD_RELOC8",
948 HOWTO (R_NIOS2_GPREL,
954 complain_overflow_dont,
955 nios2_elf32_gprel_relocate,
962 HOWTO (R_NIOS2_GNU_VTINHERIT,
968 complain_overflow_dont,
970 "R_NIOS2_GNU_VTINHERIT",
976 HOWTO (R_NIOS2_GNU_VTENTRY,
982 complain_overflow_dont,
983 _bfd_elf_rel_vtable_reloc_fn,
984 "R_NIOS2_GNU_VTENTRY",
996 complain_overflow_dont,
997 nios2_elf32_ujmp_relocate,
1004 HOWTO (R_NIOS2_CJMP,
1010 complain_overflow_dont,
1011 nios2_elf32_cjmp_relocate,
1018 HOWTO (R_NIOS2_CALLR,
1024 complain_overflow_dont,
1025 nios2_elf32_callr_relocate,
1032 HOWTO (R_NIOS2_ALIGN,
1038 complain_overflow_dont,
1039 nios2_elf32_ignore_reloc,
1046 HOWTO (R_NIOS2_GOT16,
1052 complain_overflow_bitfield,
1053 bfd_elf_generic_reloc,
1060 HOWTO (R_NIOS2_CALL16,
1066 complain_overflow_bitfield,
1067 bfd_elf_generic_reloc,
1074 HOWTO (R_NIOS2_GOTOFF_LO,
1080 complain_overflow_dont,
1081 bfd_elf_generic_reloc,
1082 "R_NIOS2_GOTOFF_LO",
1088 HOWTO (R_NIOS2_GOTOFF_HA,
1094 complain_overflow_dont,
1095 bfd_elf_generic_reloc,
1096 "R_NIOS2_GOTOFF_HA",
1102 HOWTO (R_NIOS2_PCREL_LO,
1108 complain_overflow_dont,
1109 nios2_elf32_pcrel_lo16_relocate,
1116 HOWTO (R_NIOS2_PCREL_HA,
1120 FALSE, /* This is a PC-relative relocation, but we need to subtract
1121 PC ourselves before the HIADJ. */
1123 complain_overflow_dont,
1124 nios2_elf32_pcrel_hiadj16_relocate,
1131 HOWTO (R_NIOS2_TLS_GD16,
1137 complain_overflow_bitfield,
1138 bfd_elf_generic_reloc,
1145 HOWTO (R_NIOS2_TLS_LDM16,
1151 complain_overflow_bitfield,
1152 bfd_elf_generic_reloc,
1153 "R_NIOS2_TLS_LDM16",
1159 HOWTO (R_NIOS2_TLS_LDO16,
1165 complain_overflow_bitfield,
1166 bfd_elf_generic_reloc,
1167 "R_NIOS2_TLS_LDO16",
1173 HOWTO (R_NIOS2_TLS_IE16,
1179 complain_overflow_bitfield,
1180 bfd_elf_generic_reloc,
1187 HOWTO (R_NIOS2_TLS_LE16,
1193 complain_overflow_bitfield,
1194 bfd_elf_generic_reloc,
1201 HOWTO (R_NIOS2_TLS_DTPMOD,
1207 complain_overflow_dont,
1208 bfd_elf_generic_reloc,
1209 "R_NIOS2_TLS_DTPMOD",
1215 HOWTO (R_NIOS2_TLS_DTPREL,
1221 complain_overflow_dont,
1222 bfd_elf_generic_reloc,
1223 "R_NIOS2_TLS_DTPREL",
1229 HOWTO (R_NIOS2_TLS_TPREL,
1235 complain_overflow_dont,
1236 bfd_elf_generic_reloc,
1237 "R_NIOS2_TLS_TPREL",
1243 HOWTO (R_NIOS2_COPY,
1249 complain_overflow_dont,
1250 bfd_elf_generic_reloc,
1257 HOWTO (R_NIOS2_GLOB_DAT,
1263 complain_overflow_dont,
1264 bfd_elf_generic_reloc,
1271 HOWTO (R_NIOS2_JUMP_SLOT,
1277 complain_overflow_dont,
1278 bfd_elf_generic_reloc,
1279 "R_NIOS2_JUMP_SLOT",
1285 HOWTO (R_NIOS2_RELATIVE,
1291 complain_overflow_dont,
1292 bfd_elf_generic_reloc,
1299 HOWTO (R_NIOS2_GOTOFF,
1305 complain_overflow_dont,
1306 bfd_elf_generic_reloc,
1313 HOWTO (R_NIOS2_CALL26_NOAT, /* type */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1317 FALSE, /* pc_relative */
1319 complain_overflow_dont, /* complain on overflow */
1320 nios2_elf32_call26_relocate, /* special function */
1321 "R_NIOS2_CALL26_NOAT", /* name */
1322 FALSE, /* partial_inplace */
1323 0xffffffc0, /* src_mask */
1324 0xffffffc0, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1327 HOWTO (R_NIOS2_GOT_LO,
1333 complain_overflow_dont,
1334 bfd_elf_generic_reloc,
1341 HOWTO (R_NIOS2_GOT_HA,
1347 complain_overflow_dont,
1348 bfd_elf_generic_reloc,
1355 HOWTO (R_NIOS2_CALL_LO,
1361 complain_overflow_dont,
1362 bfd_elf_generic_reloc,
1369 HOWTO (R_NIOS2_CALL_HA,
1375 complain_overflow_dont,
1376 bfd_elf_generic_reloc,
1383 HOWTO (R_NIOS2_R2_S12,
1389 complain_overflow_signed,
1390 bfd_elf_generic_reloc,
1397 HOWTO (R_NIOS2_R2_I10_1_PCREL,
1403 complain_overflow_signed,
1404 bfd_elf_generic_reloc, /* FIXME? */
1405 "R_NIOS2_R2_I10_1_PCREL",
1411 HOWTO (R_NIOS2_R2_T1I7_1_PCREL,
1417 complain_overflow_signed,
1418 bfd_elf_generic_reloc, /* FIXME? */
1419 "R_NIOS2_R2_T1I7_1_PCREL",
1425 HOWTO (R_NIOS2_R2_T1I7_2,
1431 complain_overflow_unsigned,
1432 bfd_elf_generic_reloc,
1433 "R_NIOS2_R2_T1I7_2",
1439 HOWTO (R_NIOS2_R2_T2I4,
1445 complain_overflow_unsigned,
1446 bfd_elf_generic_reloc,
1453 HOWTO (R_NIOS2_R2_T2I4_1,
1459 complain_overflow_unsigned,
1460 bfd_elf_generic_reloc,
1461 "R_NIOS2_R2_T2I4_1",
1467 HOWTO (R_NIOS2_R2_T2I4_2,
1473 complain_overflow_unsigned,
1474 bfd_elf_generic_reloc,
1475 "R_NIOS2_R2_T2I4_2",
1481 HOWTO (R_NIOS2_R2_X1I7_2,
1487 complain_overflow_unsigned,
1488 bfd_elf_generic_reloc,
1489 "R_NIOS2_R2_X1I7_2",
1495 HOWTO (R_NIOS2_R2_X2L5,
1501 complain_overflow_unsigned,
1502 bfd_elf_generic_reloc,
1509 HOWTO (R_NIOS2_R2_F1I5_2,
1515 complain_overflow_unsigned,
1516 bfd_elf_generic_reloc,
1517 "R_NIOS2_R2_F1L5_2",
1523 HOWTO (R_NIOS2_R2_L5I4X1,
1529 complain_overflow_unsigned,
1530 bfd_elf_generic_reloc,
1531 "R_NIOS2_R2_L5I4X1",
1537 HOWTO (R_NIOS2_R2_T1X1I6,
1543 complain_overflow_unsigned,
1544 bfd_elf_generic_reloc,
1545 "R_NIOS2_R2_T1X1I6",
1551 HOWTO (R_NIOS2_R2_T1X1I6_2,
1557 complain_overflow_unsigned,
1558 bfd_elf_generic_reloc,
1559 "R_NIOS2_R2_T1I1X6_2",
1565 /* Add other relocations here. */
1568 static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1];
1571 /* Return true if producing output for a R2 BFD. */
1572 #define BFD_IS_R2(abfd) (bfd_get_mach (abfd) == bfd_mach_nios2r2)
1574 /* Return the howto for relocation RTYPE. */
1575 static reloc_howto_type *
1576 lookup_howto (unsigned int rtype, bfd *abfd)
1578 static int initialized = 0;
1580 /* R2 relocations are a superset of R1, so use that for the lookup
1582 int r1_howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r1_howto_table_rel);
1583 int r2_howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r2_howto_table_rel);
1588 memset (elf_code_to_howto_index, 0xff,
1589 sizeof (elf_code_to_howto_index));
1590 for (i = 0; i < r2_howto_tbl_size; i++)
1592 elf_code_to_howto_index[elf_nios2_r2_howto_table_rel[i].type] = i;
1593 if (i < r1_howto_tbl_size)
1594 BFD_ASSERT (elf_nios2_r2_howto_table_rel[i].type
1595 == elf_nios2_r1_howto_table_rel[i].type);
1599 if (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[] =
1625 {BFD_RELOC_NONE, R_NIOS2_NONE},
1626 {BFD_RELOC_NIOS2_S16, R_NIOS2_S16},
1627 {BFD_RELOC_NIOS2_U16, R_NIOS2_U16},
1628 {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16},
1629 {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26},
1630 {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5},
1631 {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX},
1632 {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6},
1633 {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8},
1634 {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16},
1635 {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16},
1636 {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16},
1637 {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32},
1638 {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16},
1639 {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8},
1640 {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL},
1641 {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT},
1642 {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY},
1643 {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP},
1644 {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP},
1645 {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR},
1646 {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN},
1647 {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16},
1648 {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16},
1649 {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO},
1650 {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA},
1651 {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO},
1652 {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA},
1653 {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16},
1654 {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16},
1655 {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16},
1656 {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16},
1657 {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16},
1658 {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD},
1659 {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL},
1660 {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL},
1661 {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY},
1662 {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT},
1663 {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT},
1664 {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE},
1665 {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF},
1666 {BFD_RELOC_NIOS2_CALL26_NOAT, R_NIOS2_CALL26_NOAT},
1667 {BFD_RELOC_NIOS2_GOT_LO, R_NIOS2_GOT_LO},
1668 {BFD_RELOC_NIOS2_GOT_HA, R_NIOS2_GOT_HA},
1669 {BFD_RELOC_NIOS2_CALL_LO, R_NIOS2_CALL_LO},
1670 {BFD_RELOC_NIOS2_CALL_HA, R_NIOS2_CALL_HA},
1671 {BFD_RELOC_NIOS2_R2_S12, R_NIOS2_R2_S12},
1672 {BFD_RELOC_NIOS2_R2_I10_1_PCREL, R_NIOS2_R2_I10_1_PCREL},
1673 {BFD_RELOC_NIOS2_R2_T1I7_1_PCREL, R_NIOS2_R2_T1I7_1_PCREL},
1674 {BFD_RELOC_NIOS2_R2_T1I7_2, R_NIOS2_R2_T1I7_2},
1675 {BFD_RELOC_NIOS2_R2_T2I4, R_NIOS2_R2_T2I4},
1676 {BFD_RELOC_NIOS2_R2_T2I4_1, R_NIOS2_R2_T2I4_1},
1677 {BFD_RELOC_NIOS2_R2_T2I4_2, R_NIOS2_R2_T2I4_2},
1678 {BFD_RELOC_NIOS2_R2_X1I7_2, R_NIOS2_R2_X1I7_2},
1679 {BFD_RELOC_NIOS2_R2_X2L5, R_NIOS2_R2_X2L5},
1680 {BFD_RELOC_NIOS2_R2_F1I5_2, R_NIOS2_R2_F1I5_2},
1681 {BFD_RELOC_NIOS2_R2_L5I4X1, R_NIOS2_R2_L5I4X1},
1682 {BFD_RELOC_NIOS2_R2_T1X1I6, R_NIOS2_R2_T1X1I6},
1683 {BFD_RELOC_NIOS2_R2_T1X1I6_2, R_NIOS2_R2_T1X1I6_2},
1686 enum elf32_nios2_stub_type
1688 nios2_stub_call26_before,
1689 nios2_stub_call26_after,
1693 struct elf32_nios2_stub_hash_entry
1695 /* Base hash table entry structure. */
1696 struct bfd_hash_entry bh_root;
1698 /* The stub section. */
1701 /* Offset within stub_sec of the beginning of this stub. */
1702 bfd_vma stub_offset;
1704 /* Given the symbol's value and its section we can determine its final
1705 value when building the stubs (so the stub knows where to jump. */
1706 bfd_vma target_value;
1707 asection *target_section;
1709 enum elf32_nios2_stub_type stub_type;
1711 /* The symbol table entry, if any, that this was derived from. */
1712 struct elf32_nios2_link_hash_entry *hh;
1714 /* And the reloc addend that this was derived from. */
1717 /* Where this stub is being called from, or, in the case of combined
1718 stub sections, the first input section in the group. */
1722 #define nios2_stub_hash_entry(ent) \
1723 ((struct elf32_nios2_stub_hash_entry *)(ent))
1725 #define nios2_stub_hash_lookup(table, string, create, copy) \
1726 ((struct elf32_nios2_stub_hash_entry *) \
1727 bfd_hash_lookup ((table), (string), (create), (copy)))
1730 /* Nios II ELF linker hash entry. */
1732 struct elf32_nios2_link_hash_entry
1734 struct elf_link_hash_entry root;
1736 /* A pointer to the most recently used stub hash entry against this
1738 struct elf32_nios2_stub_hash_entry *hsh_cache;
1740 /* Track dynamic relocs copied for this symbol. */
1741 struct elf_dyn_relocs *dyn_relocs;
1743 #define GOT_UNKNOWN 0
1744 #define GOT_NORMAL 1
1745 #define GOT_TLS_GD 2
1746 #define GOT_TLS_IE 4
1747 unsigned char tls_type;
1749 /* We need to detect and take special action for symbols which are only
1750 referenced with %call() and not with %got(). Such symbols do not need
1751 a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy
1752 linking will not work if the dynamic GOT reloc exists.
1753 To check for this condition efficiently, we compare got_types_used against
1755 (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED.
1759 unsigned char got_types_used;
1762 #define elf32_nios2_hash_entry(ent) \
1763 ((struct elf32_nios2_link_hash_entry *) (ent))
1765 /* Get the Nios II elf linker hash table from a link_info structure. */
1766 #define elf32_nios2_hash_table(info) \
1767 ((struct elf32_nios2_link_hash_table *) ((info)->hash))
1769 /* Nios II ELF linker hash table. */
1770 struct elf32_nios2_link_hash_table
1772 /* The main hash table. */
1773 struct elf_link_hash_table root;
1775 /* The stub hash table. */
1776 struct bfd_hash_table bstab;
1778 /* Linker stub bfd. */
1781 /* Linker call-backs. */
1782 asection * (*add_stub_section) (const char *, asection *, bfd_boolean);
1783 void (*layout_sections_again) (void);
1785 /* Array to keep track of which stub sections have been created, and
1786 information on stub grouping. */
1789 /* These are the section to which stubs in the group will be
1791 asection *first_sec, *last_sec;
1792 /* The stub sections. There might be stubs inserted either before
1793 or after the real section.*/
1794 asection *first_stub_sec, *last_stub_sec;
1797 /* Assorted information used by nios2_elf32_size_stubs. */
1798 unsigned int bfd_count;
1799 unsigned int top_index;
1800 asection **input_list;
1801 Elf_Internal_Sym **all_local_syms;
1803 /* Short-cuts to get to dynamic linker sections. */
1806 /* GOT pointer symbol _gp_got. */
1807 struct elf_link_hash_entry *h_gp_got;
1810 bfd_signed_vma refcount;
1814 /* Small local sym cache. */
1815 struct sym_cache sym_cache;
1820 struct nios2_elf32_obj_tdata
1822 struct elf_obj_tdata root;
1824 /* tls_type for each local got entry. */
1825 char *local_got_tls_type;
1827 /* TRUE if TLS GD relocs have been seen for this object. */
1828 bfd_boolean has_tlsgd;
1831 #define elf32_nios2_tdata(abfd) \
1832 ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any)
1834 #define elf32_nios2_local_got_tls_type(abfd) \
1835 (elf32_nios2_tdata (abfd)->local_got_tls_type)
1837 /* The name of the dynamic interpreter. This is put in the .interp
1839 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1841 /* PLT implementation for position-dependent code. */
1842 static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */
1843 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */
1844 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */
1845 0x7800683a /* jmp r15 */
1848 static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */
1849 0x03800034, /* movhi r14, %hiadj(res_0) */
1850 0x73800004, /* addi r14, r14, %lo(res_0) */
1851 0x7b9fc83a, /* sub r15, r15, r14 */
1852 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1853 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1854 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1855 0x6800683a /* jmp r13 */
1858 /* PLT implementation for position-independent code. */
1859 static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */
1860 0x03c00034, /* movhi r15, %hiadj(index * 4) */
1861 0x7bc00004, /* addi r15, r15, %lo(index * 4) */
1862 0x00000006 /* br .PLTresolve */
1865 static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */
1866 0x001ce03a, /* nextpc r14 */
1867 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1868 0x6b9b883a, /* add r13, r13, r14 */
1869 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1870 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1871 0x6800683a /* jmp r13 */
1875 static const bfd_vma nios2_call26_stub_entry[] = {
1876 0x00400034, /* orhi at, r0, %hiadj(dest) */
1877 0x08400004, /* addi at, at, %lo(dest) */
1878 0x0800683a /* jmp at */
1881 /* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */
1883 nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value)
1885 bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset);
1887 BFD_ASSERT (value <= 0xffff || ((bfd_signed_vma) value) >= -0xffff);
1889 bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6),
1890 sec->contents + offset);
1893 /* Install COUNT 32-bit values DATA starting at offset OFFSET into
1896 nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset,
1901 bfd_put_32 (sec->owner, *data, sec->contents + offset);
1907 /* The usual way of loading a 32-bit constant into a Nios II register is to
1908 load the high 16 bits in one instruction and then add the low 16 bits with
1909 a signed add. This means that the high halfword needs to be adjusted to
1910 compensate for the sign bit of the low halfword. This function returns the
1911 adjusted high halfword for a given 32-bit constant. */
1913 bfd_vma hiadj (bfd_vma symbol_value)
1915 return ((symbol_value + 0x8000) >> 16) & 0xffff;
1918 /* Implement elf_backend_grok_prstatus:
1919 Support for core dump NOTE sections. */
1921 nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1926 switch (note->descsz)
1931 case 212: /* Linux/Nios II */
1933 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
1936 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24);
1945 /* Make a ".reg/999" section. */
1946 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1947 size, note->descpos + offset);
1950 /* Implement elf_backend_grok_psinfo. */
1952 nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1954 switch (note->descsz)
1959 case 124: /* Linux/Nios II elf_prpsinfo */
1960 elf_tdata (abfd)->core->program
1961 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1962 elf_tdata (abfd)->core->command
1963 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1966 /* Note that for some reason, a spurious space is tacked
1967 onto the end of the args in some (at least one anyway)
1968 implementations, so strip it off if it exists. */
1971 char *command = elf_tdata (abfd)->core->command;
1972 int n = strlen (command);
1974 if (0 < n && command[n - 1] == ' ')
1975 command[n - 1] = '\0';
1981 /* Assorted hash table functions. */
1983 /* Initialize an entry in the stub hash table. */
1984 static struct bfd_hash_entry *
1985 stub_hash_newfunc (struct bfd_hash_entry *entry,
1986 struct bfd_hash_table *table,
1989 /* Allocate the structure if it has not already been allocated by a
1993 entry = bfd_hash_allocate (table,
1994 sizeof (struct elf32_nios2_stub_hash_entry));
1999 /* Call the allocation method of the superclass. */
2000 entry = bfd_hash_newfunc (entry, table, string);
2003 struct elf32_nios2_stub_hash_entry *hsh;
2005 /* Initialize the local fields. */
2006 hsh = (struct elf32_nios2_stub_hash_entry *) entry;
2007 hsh->stub_sec = NULL;
2008 hsh->stub_offset = 0;
2009 hsh->target_value = 0;
2010 hsh->target_section = NULL;
2011 hsh->stub_type = nios2_stub_none;
2019 /* Create an entry in a Nios II ELF linker hash table. */
2020 static struct bfd_hash_entry *
2021 link_hash_newfunc (struct bfd_hash_entry *entry,
2022 struct bfd_hash_table *table, const char *string)
2024 /* Allocate the structure if it has not already been allocated by a
2028 entry = bfd_hash_allocate (table,
2029 sizeof (struct elf32_nios2_link_hash_entry));
2034 /* Call the allocation method of the superclass. */
2035 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2038 struct elf32_nios2_link_hash_entry *eh;
2040 eh = (struct elf32_nios2_link_hash_entry *) entry;
2041 eh->hsh_cache = NULL;
2042 eh->dyn_relocs = NULL;
2043 eh->tls_type = GOT_UNKNOWN;
2044 eh->got_types_used = 0;
2050 /* Section name for stubs is the associated section name plus this
2052 #define STUB_SUFFIX ".stub"
2054 /* Build a name for an entry in the stub hash table. */
2056 nios2_stub_name (const asection *input_section,
2057 const asection *sym_sec,
2058 const struct elf32_nios2_link_hash_entry *hh,
2059 const Elf_Internal_Rela *rel,
2060 enum elf32_nios2_stub_type stub_type)
2064 char stubpos = (stub_type == nios2_stub_call26_before) ? 'b' : 'a';
2068 len = 8 + 1 + 1 + 1+ strlen (hh->root.root.root.string) + 1 + 8 + 1;
2069 stub_name = bfd_malloc (len);
2070 if (stub_name != NULL)
2072 sprintf (stub_name, "%08x_%c_%s+%x",
2073 input_section->id & 0xffffffff,
2075 hh->root.root.root.string,
2076 (int) rel->r_addend & 0xffffffff);
2081 len = 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1;
2082 stub_name = bfd_malloc (len);
2083 if (stub_name != NULL)
2085 sprintf (stub_name, "%08x_%c_%x:%x+%x",
2086 input_section->id & 0xffffffff,
2088 sym_sec->id & 0xffffffff,
2089 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
2090 (int) rel->r_addend & 0xffffffff);
2096 /* Look up an entry in the stub hash. Stub entries are cached because
2097 creating the stub name takes a bit of time. */
2098 static struct elf32_nios2_stub_hash_entry *
2099 nios2_get_stub_entry (const asection *input_section,
2100 const asection *sym_sec,
2101 struct elf32_nios2_link_hash_entry *hh,
2102 const Elf_Internal_Rela *rel,
2103 struct elf32_nios2_link_hash_table *htab,
2104 enum elf32_nios2_stub_type stub_type)
2106 struct elf32_nios2_stub_hash_entry *hsh;
2107 const asection *id_sec;
2109 /* If this input section is part of a group of sections sharing one
2110 stub section, then use the id of the first/last section in the group,
2111 depending on the stub section placement relative to the group.
2112 Stub names need to include a section id, as there may well be
2113 more than one stub used to reach say, printf, and we need to
2114 distinguish between them. */
2115 if (stub_type == nios2_stub_call26_before)
2116 id_sec = htab->stub_group[input_section->id].first_sec;
2118 id_sec = htab->stub_group[input_section->id].last_sec;
2120 if (hh != NULL && hh->hsh_cache != NULL
2121 && hh->hsh_cache->hh == hh
2122 && hh->hsh_cache->id_sec == id_sec
2123 && hh->hsh_cache->stub_type == stub_type)
2125 hsh = hh->hsh_cache;
2131 stub_name = nios2_stub_name (id_sec, sym_sec, hh, rel, stub_type);
2132 if (stub_name == NULL)
2135 hsh = nios2_stub_hash_lookup (&htab->bstab,
2136 stub_name, FALSE, FALSE);
2139 hh->hsh_cache = hsh;
2147 /* Add a new stub entry to the stub hash. Not all fields of the new
2148 stub entry are initialised. */
2149 static struct elf32_nios2_stub_hash_entry *
2150 nios2_add_stub (const char *stub_name,
2152 struct elf32_nios2_link_hash_table *htab,
2153 enum elf32_nios2_stub_type stub_type)
2157 asection **secptr, **linkptr;
2158 struct elf32_nios2_stub_hash_entry *hsh;
2161 if (stub_type == nios2_stub_call26_before)
2163 link_sec = htab->stub_group[section->id].first_sec;
2164 secptr = &(htab->stub_group[section->id].first_stub_sec);
2165 linkptr = &(htab->stub_group[link_sec->id].first_stub_sec);
2170 link_sec = htab->stub_group[section->id].last_sec;
2171 secptr = &(htab->stub_group[section->id].last_stub_sec);
2172 linkptr = &(htab->stub_group[link_sec->id].last_stub_sec);
2176 if (stub_sec == NULL)
2178 stub_sec = *linkptr;
2179 if (stub_sec == NULL)
2185 namelen = strlen (link_sec->name);
2186 len = namelen + sizeof (STUB_SUFFIX);
2187 s_name = bfd_alloc (htab->stub_bfd, len);
2191 memcpy (s_name, link_sec->name, namelen);
2192 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2194 stub_sec = (*htab->add_stub_section) (s_name, link_sec, afterp);
2195 if (stub_sec == NULL)
2197 *linkptr = stub_sec;
2202 /* Enter this entry into the linker stub hash table. */
2203 hsh = nios2_stub_hash_lookup (&htab->bstab, stub_name,
2207 /* xgettext:c-format */
2208 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
2214 hsh->stub_sec = stub_sec;
2215 hsh->stub_offset = 0;
2216 hsh->id_sec = link_sec;
2220 /* Set up various things so that we can make a list of input sections
2221 for each output section included in the link. Returns -1 on error,
2222 0 when no stubs will be needed, and 1 on success. */
2224 nios2_elf32_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
2227 unsigned int bfd_count;
2228 unsigned int top_id, top_index;
2230 asection **input_list, **list;
2232 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2234 /* Count the number of input BFDs and find the top input section id. */
2235 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2237 input_bfd = input_bfd->link.next)
2240 for (section = input_bfd->sections;
2242 section = section->next)
2244 if (top_id < section->id)
2245 top_id = section->id;
2249 htab->bfd_count = bfd_count;
2251 amt = sizeof (struct map_stub) * (top_id + 1);
2252 htab->stub_group = bfd_zmalloc (amt);
2253 if (htab->stub_group == NULL)
2256 /* We can't use output_bfd->section_count here to find the top output
2257 section index as some sections may have been removed, and
2258 strip_excluded_output_sections doesn't renumber the indices. */
2259 for (section = output_bfd->sections, top_index = 0;
2261 section = section->next)
2263 if (top_index < section->index)
2264 top_index = section->index;
2267 htab->top_index = top_index;
2268 amt = sizeof (asection *) * (top_index + 1);
2269 input_list = bfd_malloc (amt);
2270 htab->input_list = input_list;
2271 if (input_list == NULL)
2274 /* For sections we aren't interested in, mark their entries with a
2275 value we can check later. */
2276 list = input_list + top_index;
2278 *list = bfd_abs_section_ptr;
2279 while (list-- != input_list);
2281 for (section = output_bfd->sections;
2283 section = section->next)
2285 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
2286 * have PC relative relocs in them but no code flag set. */
2287 if (((section->flags & SEC_CODE) != 0) ||
2288 strcmp(".ctors", section->name) ||
2289 strcmp(".dtors", section->name))
2290 input_list[section->index] = NULL;
2296 /* The linker repeatedly calls this function for each input section,
2297 in the order that input sections are linked into output sections.
2298 Build lists of input sections to determine groupings between which
2299 we may insert linker stubs. */
2301 nios2_elf32_next_input_section (struct bfd_link_info *info, asection *isec)
2303 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2305 if (isec->output_section->index <= htab->top_index)
2307 asection **list = htab->input_list + isec->output_section->index;
2308 if (*list != bfd_abs_section_ptr)
2310 /* Steal the last_sec pointer for our list.
2311 This happens to make the list in reverse order,
2312 which is what we want. */
2313 htab->stub_group[isec->id].last_sec = *list;
2319 /* Segment mask for CALL26 relocation relaxation. */
2320 #define CALL26_SEGMENT(x) ((x) & 0xf0000000)
2322 /* Fudge factor for approximate maximum size of all stubs that might
2323 be inserted by the linker. This does not actually limit the number
2324 of stubs that might be inserted, and only affects strategy for grouping
2325 and placement of stubs. Perhaps this should be computed based on number
2326 of relocations seen, or be specifiable on the command line. */
2327 #define MAX_STUB_SECTION_SIZE 0xffff
2329 /* See whether we can group stub sections together. Grouping stub
2330 sections may result in fewer stubs. More importantly, we need to
2331 put all .init* and .fini* stubs at the end of the .init or
2332 .fini output sections respectively, because glibc splits the
2333 _init and _fini functions into multiple parts. Putting a stub in
2334 the middle of a function is not a good idea.
2335 Rather than computing groups of a maximum fixed size, for Nios II
2336 CALL26 relaxation it makes more sense to compute the groups based on
2337 sections that fit within a 256MB address segment. Also do not allow
2338 a group to span more than one output section, since different output
2339 sections might correspond to different memory banks on a bare-metal
2342 group_sections (struct elf32_nios2_link_hash_table *htab)
2344 asection **list = htab->input_list + htab->top_index;
2347 /* The list is in reverse order so we'll search backwards looking
2348 for the first section that begins in the same memory segment,
2349 marking sections along the way to point at the tail for this
2351 asection *tail = *list;
2352 if (tail == bfd_abs_section_ptr)
2354 while (tail != NULL)
2356 bfd_vma start = tail->output_section->vma + tail->output_offset;
2357 bfd_vma end = start + tail->size;
2358 bfd_vma segment = CALL26_SEGMENT (end);
2361 if (segment != CALL26_SEGMENT (start)
2362 || segment != CALL26_SEGMENT (end + MAX_STUB_SECTION_SIZE))
2363 /* This section spans more than one memory segment, or is
2364 close enough to the end of the segment that adding stub
2365 sections before it might cause it to move so that it
2366 spans memory segments, or that stubs added at the end of
2367 this group might overflow into the next memory segment.
2368 Put it in a group by itself to localize the effects. */
2370 prev = htab->stub_group[tail->id].last_sec;
2371 htab->stub_group[tail->id].last_sec = tail;
2372 htab->stub_group[tail->id].first_sec = tail;
2375 /* Collect more sections for this group. */
2377 asection *curr, *first;
2378 for (curr = tail; ; curr = prev)
2380 prev = htab->stub_group[curr->id].last_sec;
2382 || tail->output_section != prev->output_section
2383 || (CALL26_SEGMENT (prev->output_section->vma
2384 + prev->output_offset)
2389 for (curr = tail; ; curr = prev)
2391 prev = htab->stub_group[curr->id].last_sec;
2392 htab->stub_group[curr->id].last_sec = tail;
2393 htab->stub_group[curr->id].first_sec = first;
2399 /* Reset tail for the next group. */
2403 while (list-- != htab->input_list);
2404 free (htab->input_list);
2407 /* Determine the type of stub needed, if any, for a call. */
2408 static enum elf32_nios2_stub_type
2409 nios2_type_of_stub (asection *input_sec,
2410 const Elf_Internal_Rela *rel,
2411 struct elf32_nios2_link_hash_entry *hh,
2412 struct elf32_nios2_link_hash_table *htab,
2413 bfd_vma destination,
2414 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2416 bfd_vma location, segment, start, end;
2417 asection *s0, *s1, *s;
2420 !(hh->root.root.type == bfd_link_hash_defined
2421 || hh->root.root.type == bfd_link_hash_defweak))
2422 return nios2_stub_none;
2424 /* Determine where the call point is. */
2425 location = (input_sec->output_section->vma
2426 + input_sec->output_offset + rel->r_offset);
2427 segment = CALL26_SEGMENT (location);
2429 /* Nios II CALL and JMPI instructions can transfer control to addresses
2430 within the same 256MB segment as the PC. */
2431 if (segment == CALL26_SEGMENT (destination))
2432 return nios2_stub_none;
2434 /* Find the start and end addresses of the stub group. Also account for
2435 any already-created stub sections for this group. Note that for stubs
2436 in the end section, only the first instruction of the last stub
2437 (12 bytes long) needs to be within range. */
2438 s0 = htab->stub_group[input_sec->id].first_sec;
2439 s = htab->stub_group[s0->id].first_stub_sec;
2440 if (s != NULL && s->size > 0)
2441 start = s->output_section->vma + s->output_offset;
2443 start = s0->output_section->vma + s0->output_offset;
2445 s1 = htab->stub_group[input_sec->id].last_sec;
2446 s = htab->stub_group[s1->id].last_stub_sec;
2447 if (s != NULL && s->size > 0)
2448 end = s->output_section->vma + s->output_offset + s->size - 8;
2450 end = s1->output_section->vma + s1->output_offset + s1->size;
2452 BFD_ASSERT (start < end);
2453 BFD_ASSERT (start <= location);
2454 BFD_ASSERT (location < end);
2456 /* Put stubs at the end of the group unless that is not a valid
2457 location and the beginning of the group is. It might be that
2458 neither the beginning nor end works if we have an input section
2459 so large that it spans multiple segment boundaries. In that
2460 case, punt; the end result will be a relocation overflow error no
2461 matter what we do here.
2463 Note that adding stubs pushes up the addresses of all subsequent
2464 sections, so that stubs allocated on one pass through the
2465 relaxation loop may not be valid on the next pass. (E.g., we may
2466 allocate a stub at the beginning of the section on one pass and
2467 find that the call site has been bumped into the next memory
2468 segment on the next pass.) The important thing to note is that
2469 we never try to reclaim the space allocated to such unused stubs,
2470 so code size and section addresses can only increase with each
2471 iteration. Accounting for the start and end addresses of the
2472 already-created stub sections ensures that when the algorithm
2473 converges, it converges accurately, with the entire appropriate
2474 stub section accessible from the call site and not just the
2475 address at the start or end of the stub group proper. */
2477 if (segment == CALL26_SEGMENT (end))
2478 return nios2_stub_call26_after;
2479 else if (segment == CALL26_SEGMENT (start))
2480 return nios2_stub_call26_before;
2482 /* Perhaps this should be a dedicated error code. */
2483 return nios2_stub_none;
2487 nios2_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
2489 struct elf32_nios2_stub_hash_entry *hsh
2490 = (struct elf32_nios2_stub_hash_entry *) gen_entry;
2491 asection *stub_sec = hsh->stub_sec;
2494 /* Make a note of the offset within the stubs for this entry. */
2495 hsh->stub_offset = stub_sec->size;
2497 switch (hsh->stub_type)
2499 case nios2_stub_call26_before:
2500 case nios2_stub_call26_after:
2501 /* A call26 stub looks like:
2502 orhi at, %hiadj(dest)
2503 addi at, at, %lo(dest)
2505 Note that call/jmpi instructions can't be used in PIC code
2506 so there is no reason for the stub to be PIC, either. */
2507 sym_value = (hsh->target_value
2508 + hsh->target_section->output_offset
2509 + hsh->target_section->output_section->vma
2512 nios2_elf32_install_data (stub_sec, nios2_call26_stub_entry,
2513 hsh->stub_offset, 3);
2514 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset,
2516 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset + 4,
2517 (sym_value & 0xffff));
2518 stub_sec->size += 12;
2528 /* As above, but don't actually build the stub. Just bump offset so
2529 we know stub section sizes. */
2531 nios2_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
2533 struct elf32_nios2_stub_hash_entry *hsh
2534 = (struct elf32_nios2_stub_hash_entry *) gen_entry;
2536 switch (hsh->stub_type)
2538 case nios2_stub_call26_before:
2539 case nios2_stub_call26_after:
2540 hsh->stub_sec->size += 12;
2549 /* Read in all local syms for all input bfds.
2550 Returns -1 on error, 0 otherwise. */
2553 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
2554 struct bfd_link_info *info)
2556 unsigned int bfd_indx;
2557 Elf_Internal_Sym *local_syms, **all_local_syms;
2558 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2560 /* We want to read in symbol extension records only once. To do this
2561 we need to read in the local symbols in parallel and save them for
2562 later use; so hold pointers to the local symbols in an array. */
2563 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
2564 all_local_syms = bfd_zmalloc (amt);
2565 htab->all_local_syms = all_local_syms;
2566 if (all_local_syms == NULL)
2569 /* Walk over all the input BFDs, swapping in local symbols. */
2572 input_bfd = input_bfd->link.next, bfd_indx++)
2574 Elf_Internal_Shdr *symtab_hdr;
2576 /* We'll need the symbol table in a second. */
2577 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2578 if (symtab_hdr->sh_info == 0)
2581 /* We need an array of the local symbols attached to the input bfd. */
2582 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
2583 if (local_syms == NULL)
2585 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2586 symtab_hdr->sh_info, 0,
2588 /* Cache them for elf_link_input_bfd. */
2589 symtab_hdr->contents = (unsigned char *) local_syms;
2591 if (local_syms == NULL)
2594 all_local_syms[bfd_indx] = local_syms;
2600 /* Determine and set the size of the stub section for a final link. */
2602 nios2_elf32_size_stubs (bfd *output_bfd, bfd *stub_bfd,
2603 struct bfd_link_info *info,
2604 asection *(*add_stub_section) (const char *,
2605 asection *, bfd_boolean),
2606 void (*layout_sections_again) (void))
2608 bfd_boolean stub_changed = FALSE;
2609 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2611 /* Stash our params away. */
2612 htab->stub_bfd = stub_bfd;
2613 htab->add_stub_section = add_stub_section;
2614 htab->layout_sections_again = layout_sections_again;
2616 /* FIXME: We only compute the section groups once. This could cause
2617 problems if adding a large stub section causes following sections,
2618 or parts of them, to move into another segment. However, this seems
2619 to be consistent with the way other back ends handle this.... */
2620 group_sections (htab);
2622 if (get_local_syms (output_bfd, info->input_bfds, info))
2624 if (htab->all_local_syms)
2625 goto error_ret_free_local;
2632 unsigned int bfd_indx;
2635 for (input_bfd = info->input_bfds, bfd_indx = 0;
2637 input_bfd = input_bfd->link.next, bfd_indx++)
2639 Elf_Internal_Shdr *symtab_hdr;
2641 Elf_Internal_Sym *local_syms;
2643 /* We'll need the symbol table in a second. */
2644 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2645 if (symtab_hdr->sh_info == 0)
2648 local_syms = htab->all_local_syms[bfd_indx];
2650 /* Walk over each section attached to the input bfd. */
2651 for (section = input_bfd->sections;
2653 section = section->next)
2655 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2657 /* If there aren't any relocs, then there's nothing more
2659 if ((section->flags & SEC_RELOC) == 0
2660 || section->reloc_count == 0)
2663 /* If this section is a link-once section that will be
2664 discarded, then don't create any stubs. */
2665 if (section->output_section == NULL
2666 || section->output_section->owner != output_bfd)
2669 /* Get the relocs. */
2671 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
2673 if (internal_relocs == NULL)
2674 goto error_ret_free_local;
2676 /* Now examine each relocation. */
2677 irela = internal_relocs;
2678 irelaend = irela + section->reloc_count;
2679 for (; irela < irelaend; irela++)
2681 unsigned int r_type, r_indx;
2682 enum elf32_nios2_stub_type stub_type;
2683 struct elf32_nios2_stub_hash_entry *hsh;
2686 bfd_vma destination;
2687 struct elf32_nios2_link_hash_entry *hh;
2689 const asection *id_sec;
2691 r_type = ELF32_R_TYPE (irela->r_info);
2692 r_indx = ELF32_R_SYM (irela->r_info);
2694 if (r_type >= (unsigned int) R_NIOS2_ILLEGAL)
2696 bfd_set_error (bfd_error_bad_value);
2697 error_ret_free_internal:
2698 if (elf_section_data (section)->relocs == NULL)
2699 free (internal_relocs);
2700 goto error_ret_free_local;
2703 /* Only look for stubs on CALL and JMPI instructions. */
2704 if (r_type != (unsigned int) R_NIOS2_CALL26)
2707 /* Now determine the call target, its name, value,
2713 if (r_indx < symtab_hdr->sh_info)
2715 /* It's a local symbol. */
2716 Elf_Internal_Sym *sym;
2717 Elf_Internal_Shdr *hdr;
2720 sym = local_syms + r_indx;
2721 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2722 sym_value = sym->st_value;
2723 shndx = sym->st_shndx;
2724 if (shndx < elf_numsections (input_bfd))
2726 hdr = elf_elfsections (input_bfd)[shndx];
2727 sym_sec = hdr->bfd_section;
2728 destination = (sym_value + irela->r_addend
2729 + sym_sec->output_offset
2730 + sym_sec->output_section->vma);
2735 /* It's an external symbol. */
2738 e_indx = r_indx - symtab_hdr->sh_info;
2739 hh = ((struct elf32_nios2_link_hash_entry *)
2740 elf_sym_hashes (input_bfd)[e_indx]);
2742 while (hh->root.root.type == bfd_link_hash_indirect
2743 || hh->root.root.type == bfd_link_hash_warning)
2744 hh = ((struct elf32_nios2_link_hash_entry *)
2745 hh->root.root.u.i.link);
2747 if (hh->root.root.type == bfd_link_hash_defined
2748 || hh->root.root.type == bfd_link_hash_defweak)
2750 sym_sec = hh->root.root.u.def.section;
2751 sym_value = hh->root.root.u.def.value;
2753 if (sym_sec->output_section != NULL)
2754 destination = (sym_value + irela->r_addend
2755 + sym_sec->output_offset
2756 + sym_sec->output_section->vma);
2760 else if (hh->root.root.type == bfd_link_hash_undefweak)
2762 if (! bfd_link_pic (info))
2765 else if (hh->root.root.type == bfd_link_hash_undefined)
2767 if (! (info->unresolved_syms_in_objects == RM_IGNORE
2768 && (ELF_ST_VISIBILITY (hh->root.other)
2774 bfd_set_error (bfd_error_bad_value);
2775 goto error_ret_free_internal;
2779 /* Determine what (if any) linker stub is needed. */
2780 stub_type = nios2_type_of_stub (section, irela, hh, htab,
2782 if (stub_type == nios2_stub_none)
2785 /* Support for grouping stub sections. */
2786 if (stub_type == nios2_stub_call26_before)
2787 id_sec = htab->stub_group[section->id].first_sec;
2789 id_sec = htab->stub_group[section->id].last_sec;
2791 /* Get the name of this stub. */
2792 stub_name = nios2_stub_name (id_sec, sym_sec, hh, irela,
2795 goto error_ret_free_internal;
2797 hsh = nios2_stub_hash_lookup (&htab->bstab,
2802 /* The proper stub has already been created. */
2807 hsh = nios2_add_stub (stub_name, section, htab, stub_type);
2811 goto error_ret_free_internal;
2813 hsh->target_value = sym_value;
2814 hsh->target_section = sym_sec;
2815 hsh->stub_type = stub_type;
2817 hsh->addend = irela->r_addend;
2818 stub_changed = TRUE;
2821 /* We're done with the internal relocs, free them. */
2822 if (elf_section_data (section)->relocs == NULL)
2823 free (internal_relocs);
2830 /* OK, we've added some stubs. Find out the new size of the
2832 for (stub_sec = htab->stub_bfd->sections;
2834 stub_sec = stub_sec->next)
2837 bfd_hash_traverse (&htab->bstab, nios2_size_one_stub, htab);
2839 /* Ask the linker to do its stuff. */
2840 (*htab->layout_sections_again) ();
2841 stub_changed = FALSE;
2844 free (htab->all_local_syms);
2847 error_ret_free_local:
2848 free (htab->all_local_syms);
2852 /* Build all the stubs associated with the current output file. The
2853 stubs are kept in a hash table attached to the main linker hash
2854 table. This function is called via nios2elf_finish in the linker. */
2856 nios2_elf32_build_stubs (struct bfd_link_info *info)
2859 struct bfd_hash_table *table;
2860 struct elf32_nios2_link_hash_table *htab;
2862 htab = elf32_nios2_hash_table (info);
2864 for (stub_sec = htab->stub_bfd->sections;
2866 stub_sec = stub_sec->next)
2867 /* The stub_bfd may contain non-stub sections if it is also the
2868 dynobj. Any such non-stub sections are created with the
2869 SEC_LINKER_CREATED flag set, while stub sections do not
2870 have that flag. Ignore any non-stub sections here. */
2871 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
2875 /* Allocate memory to hold the linker stubs. */
2876 size = stub_sec->size;
2877 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
2878 if (stub_sec->contents == NULL && size != 0)
2883 /* Build the stubs as directed by the stub hash table. */
2884 table = &htab->bstab;
2885 bfd_hash_traverse (table, nios2_build_one_stub, info);
2891 #define is_nios2_elf(bfd) \
2892 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2893 && elf_object_id (bfd) == NIOS2_ELF_DATA)
2895 /* Merge backend specific data from an object file to the output
2896 object file when linking. */
2899 nios2_elf32_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
2901 bfd *obfd = info->output_bfd;
2905 if (!is_nios2_elf (ibfd) || !is_nios2_elf (obfd))
2908 /* Check if we have the same endianness. */
2909 if (! _bfd_generic_verify_endian_match (ibfd, info))
2912 new_flags = elf_elfheader (ibfd)->e_flags;
2913 old_flags = elf_elfheader (obfd)->e_flags;
2914 if (!elf_flags_init (obfd))
2916 /* First call, no flags set. */
2917 elf_flags_init (obfd) = TRUE;
2918 elf_elfheader (obfd)->e_flags = new_flags;
2923 case EF_NIOS2_ARCH_R1:
2924 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r1);
2926 case EF_NIOS2_ARCH_R2:
2927 if (bfd_big_endian (ibfd))
2930 (_("error: %pB: big-endian R2 is not supported"), ibfd);
2931 bfd_set_error (bfd_error_bad_value);
2934 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r2);
2939 /* Incompatible flags. */
2940 else if (new_flags != old_flags)
2942 /* So far, the only incompatible flags denote incompatible
2945 /* xgettext:c-format */
2946 (_("error: %pB: conflicting CPU architectures %d/%d"),
2947 ibfd, new_flags, old_flags);
2948 bfd_set_error (bfd_error_bad_value);
2952 /* Merge Tag_compatibility attributes and any common GNU ones. */
2953 _bfd_elf_merge_object_attributes (ibfd, info);
2958 /* Implement bfd_elf32_bfd_reloc_type_lookup:
2959 Given a BFD reloc type, return a howto structure. */
2961 static reloc_howto_type *
2962 nios2_elf32_bfd_reloc_type_lookup (bfd *abfd,
2963 bfd_reloc_code_real_type code)
2967 for (i = 0; i < (int) ARRAY_SIZE (nios2_reloc_map); ++i)
2968 if (nios2_reloc_map[i].bfd_val == code)
2969 return lookup_howto (nios2_reloc_map[i].elf_val, abfd);
2973 /* Implement bfd_elf32_bfd_reloc_name_lookup:
2974 Given a reloc name, return a howto structure. */
2976 static reloc_howto_type *
2977 nios2_elf32_bfd_reloc_name_lookup (bfd *abfd,
2981 reloc_howto_type *howto_tbl;
2984 if (BFD_IS_R2 (abfd))
2986 howto_tbl = elf_nios2_r2_howto_table_rel;
2987 howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r2_howto_table_rel);
2991 howto_tbl = elf_nios2_r1_howto_table_rel;
2992 howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r1_howto_table_rel);
2995 for (i = 0; i < howto_tbl_size; i++)
2996 if (howto_tbl[i].name && strcasecmp (howto_tbl[i].name, r_name) == 0)
2997 return howto_tbl + i;
3002 /* Implement elf_info_to_howto:
3003 Given a ELF32 relocation, fill in a arelent structure. */
3006 nios2_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr,
3007 Elf_Internal_Rela *dst)
3009 unsigned int r_type;
3011 r_type = ELF32_R_TYPE (dst->r_info);
3012 if ((cache_ptr->howto = lookup_howto (r_type, abfd)) == NULL)
3014 /* xgettext:c-format */
3015 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
3017 bfd_set_error (bfd_error_bad_value);
3023 /* Return the base VMA address which should be subtracted from real addresses
3024 when resolving @dtpoff relocation.
3025 This is PT_TLS segment p_vaddr. */
3027 dtpoff_base (struct bfd_link_info *info)
3029 /* If tls_sec is NULL, we should have signalled an error already. */
3030 if (elf_hash_table (info)->tls_sec == NULL)
3032 return elf_hash_table (info)->tls_sec->vma;
3035 /* Return the relocation value for @tpoff relocation
3036 if STT_TLS virtual address is ADDRESS. */
3038 tpoff (struct bfd_link_info *info, bfd_vma address)
3040 struct elf_link_hash_table *htab = elf_hash_table (info);
3042 /* If tls_sec is NULL, we should have signalled an error already. */
3043 if (htab->tls_sec == NULL)
3045 return address - htab->tls_sec->vma;
3048 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
3049 dangerous relocation. */
3051 nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info)
3054 bfd_boolean gp_found;
3055 struct bfd_hash_entry *h;
3056 struct bfd_link_hash_entry *lh;
3058 /* If we've already figured out what GP will be, just return it. */
3059 *pgp = _bfd_get_gp_value (output_bfd);
3063 h = bfd_hash_lookup (&info->hash->table, "_gp", FALSE, FALSE);
3064 lh = (struct bfd_link_hash_entry *) h;
3070 case bfd_link_hash_undefined:
3071 case bfd_link_hash_undefweak:
3072 case bfd_link_hash_common:
3075 case bfd_link_hash_defined:
3076 case bfd_link_hash_defweak:
3079 asection *sym_sec = lh->u.def.section;
3080 bfd_vma sym_value = lh->u.def.value;
3082 if (sym_sec->output_section)
3083 sym_value = (sym_value + sym_sec->output_offset
3084 + sym_sec->output_section->vma);
3088 case bfd_link_hash_indirect:
3089 case bfd_link_hash_warning:
3091 /* @@FIXME ignoring warning for now */
3093 case bfd_link_hash_new:
3103 /* Only get the error once. */
3105 _bfd_set_gp_value (output_bfd, *pgp);
3109 _bfd_set_gp_value (output_bfd, *pgp);
3114 /* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous
3115 if it's not available as we don't have a link_info pointer available here
3116 to look it up in the output symbol table. We don't need to adjust the
3117 symbol value for an external symbol if we are producing relocatable
3119 static bfd_reloc_status_type
3120 nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
3121 char **error_message, bfd_vma *pgp)
3123 if (bfd_is_und_section (symbol->section) && !relocatable)
3126 return bfd_reloc_undefined;
3129 *pgp = _bfd_get_gp_value (output_bfd);
3130 if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0))
3134 /* Make up a value. */
3135 *pgp = symbol->section->output_section->vma + 0x4000;
3136 _bfd_set_gp_value (output_bfd, *pgp);
3141 = (char *) _("global pointer relative relocation when _gp not defined");
3142 return bfd_reloc_dangerous;
3146 return bfd_reloc_ok;
3149 /* Do the relocations that require special handling. */
3150 static bfd_reloc_status_type
3151 nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto,
3152 asection *input_section,
3153 bfd_byte *data, bfd_vma offset,
3154 bfd_vma symbol_value, bfd_vma addend)
3156 symbol_value = symbol_value + addend;
3158 symbol_value = (symbol_value >> 16) & 0xffff;
3159 return _bfd_final_link_relocate (howto, abfd, input_section,
3160 data, offset, symbol_value, addend);
3163 static bfd_reloc_status_type
3164 nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
3165 asection *input_section,
3166 bfd_byte *data, bfd_vma offset,
3167 bfd_vma symbol_value, bfd_vma addend)
3169 symbol_value = symbol_value + addend;
3171 symbol_value = symbol_value & 0xffff;
3172 return _bfd_final_link_relocate (howto, abfd, input_section,
3173 data, offset, symbol_value, addend);
3176 static bfd_reloc_status_type
3177 nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
3178 asection *input_section,
3179 bfd_byte *data, bfd_vma offset,
3180 bfd_vma symbol_value, bfd_vma addend)
3182 symbol_value = symbol_value + addend;
3184 symbol_value = hiadj(symbol_value);
3185 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset,
3186 symbol_value, addend);
3189 static bfd_reloc_status_type
3190 nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
3191 asection *input_section,
3192 bfd_byte *data, bfd_vma offset,
3193 bfd_vma symbol_value, bfd_vma addend)
3195 symbol_value = symbol_value + addend;
3197 symbol_value = symbol_value & 0xffff;
3198 return _bfd_final_link_relocate (howto, abfd, input_section,
3199 data, offset, symbol_value, addend);
3202 static bfd_reloc_status_type
3203 nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
3204 asection *input_section,
3205 bfd_byte *data, bfd_vma offset,
3206 bfd_vma symbol_value, bfd_vma addend)
3208 symbol_value = symbol_value + addend;
3209 symbol_value -= (input_section->output_section->vma
3210 + input_section->output_offset);
3211 symbol_value -= offset;
3213 symbol_value = hiadj(symbol_value);
3214 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset,
3215 symbol_value, addend);
3218 static bfd_reloc_status_type
3219 nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto,
3220 asection *input_section,
3221 bfd_byte *data, bfd_vma offset,
3222 bfd_vma symbol_value, bfd_vma addend)
3224 /* NIOS2 pc relative relocations are relative to the next 32-bit instruction
3225 so we need to subtract 4 before doing a final_link_relocate. */
3226 symbol_value = symbol_value + addend - 4;
3228 return _bfd_final_link_relocate (howto, abfd, input_section,
3229 data, offset, symbol_value, addend);
3232 static bfd_reloc_status_type
3233 nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto,
3234 asection *input_section,
3235 bfd_byte *data, bfd_vma offset,
3236 bfd_vma symbol_value, bfd_vma addend)
3238 /* Check that the relocation is in the same page as the current address. */
3239 if (CALL26_SEGMENT (symbol_value + addend)
3240 != CALL26_SEGMENT (input_section->output_section->vma
3241 + input_section->output_offset
3243 return bfd_reloc_overflow;
3245 /* Check that the target address is correctly aligned on a 4-byte
3247 if ((symbol_value + addend) & 0x3)
3248 return bfd_reloc_overflow;
3250 return _bfd_final_link_relocate (howto, abfd, input_section,
3251 data, offset, symbol_value, addend);
3254 static bfd_reloc_status_type
3255 nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto,
3256 asection *input_section,
3257 bfd_byte *data, bfd_vma offset,
3258 bfd_vma symbol_value, bfd_vma addend)
3260 /* Because we need the output_bfd, the special handling is done
3261 in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */
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_ujmp_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 bfd_vma symbol_lo16, symbol_hi16;
3273 bfd_reloc_status_type r;
3274 symbol_value = symbol_value + addend;
3276 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3277 symbol_lo16 = symbol_value & 0xffff;
3279 r = _bfd_final_link_relocate (howto, abfd, input_section,
3280 data, offset, symbol_hi16, addend);
3282 if (r == bfd_reloc_ok)
3283 return _bfd_final_link_relocate (howto, abfd, input_section,
3284 data, offset + 4, symbol_lo16, addend);
3289 static bfd_reloc_status_type
3290 nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto,
3291 asection *input_section,
3292 bfd_byte *data, bfd_vma offset,
3293 bfd_vma symbol_value, bfd_vma addend)
3295 bfd_vma symbol_lo16, symbol_hi16;
3296 bfd_reloc_status_type r;
3297 symbol_value = symbol_value + addend;
3299 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3300 symbol_lo16 = symbol_value & 0xffff;
3302 r = _bfd_final_link_relocate (howto, abfd, input_section,
3303 data, offset, symbol_hi16, addend);
3305 if (r == bfd_reloc_ok)
3306 return _bfd_final_link_relocate (howto, abfd, input_section,
3307 data, offset + 4, symbol_lo16, addend);
3312 static bfd_reloc_status_type
3313 nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto,
3314 asection *input_section,
3315 bfd_byte *data, bfd_vma offset,
3316 bfd_vma symbol_value, bfd_vma addend)
3318 bfd_vma symbol_lo16, symbol_hi16;
3319 bfd_reloc_status_type r;
3320 symbol_value = symbol_value + addend;
3322 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3323 symbol_lo16 = symbol_value & 0xffff;
3325 r = _bfd_final_link_relocate (howto, abfd, input_section,
3326 data, offset, symbol_hi16, addend);
3328 if (r == bfd_reloc_ok)
3329 return _bfd_final_link_relocate (howto, abfd, input_section,
3330 data, offset + 4, symbol_lo16, addend);
3335 /* HOWTO handlers for relocations that require special handling. */
3337 /* This is for relocations used only when relaxing to ensure
3338 changes in size of section don't screw up .align. */
3339 static bfd_reloc_status_type
3340 nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
3341 asymbol *symbol ATTRIBUTE_UNUSED,
3342 void *data ATTRIBUTE_UNUSED, asection *input_section,
3344 char **error_message ATTRIBUTE_UNUSED)
3346 if (output_bfd != NULL)
3347 reloc_entry->address += input_section->output_offset;
3348 return bfd_reloc_ok;
3351 static bfd_reloc_status_type
3352 nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3353 void *data, asection *input_section,
3355 char **error_message ATTRIBUTE_UNUSED)
3357 /* This part is from bfd_elf_generic_reloc. */
3358 if (output_bfd != NULL
3359 && (symbol->flags & BSF_SECTION_SYM) == 0
3360 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3362 reloc_entry->address += input_section->output_offset;
3363 return bfd_reloc_ok;
3366 if (output_bfd != NULL)
3367 /* FIXME: See bfd_perform_relocation. Is this right? */
3368 return bfd_reloc_continue;
3370 return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto,
3372 data, reloc_entry->address,
3374 + symbol->section->output_section->vma
3375 + symbol->section->output_offset),
3376 reloc_entry->addend);
3379 static bfd_reloc_status_type
3380 nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3381 void *data, asection *input_section,
3383 char **error_message ATTRIBUTE_UNUSED)
3385 /* This part is from bfd_elf_generic_reloc. */
3386 if (output_bfd != NULL
3387 && (symbol->flags & BSF_SECTION_SYM) == 0
3388 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3390 reloc_entry->address += input_section->output_offset;
3391 return bfd_reloc_ok;
3394 if (output_bfd != NULL)
3395 /* FIXME: See bfd_perform_relocation. Is this right? */
3396 return bfd_reloc_continue;
3398 return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto,
3400 data, reloc_entry->address,
3402 + symbol->section->output_section->vma
3403 + symbol->section->output_offset),
3404 reloc_entry->addend);
3407 static bfd_reloc_status_type
3408 nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3409 void *data, asection *input_section,
3411 char **error_message ATTRIBUTE_UNUSED)
3413 /* This part is from bfd_elf_generic_reloc. */
3414 if (output_bfd != NULL
3415 && (symbol->flags & BSF_SECTION_SYM) == 0
3416 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3418 reloc_entry->address += input_section->output_offset;
3419 return bfd_reloc_ok;
3422 if (output_bfd != NULL)
3423 /* FIXME: See bfd_perform_relocation. Is this right? */
3424 return bfd_reloc_continue;
3426 return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto,
3428 data, reloc_entry->address,
3430 + symbol->section->output_section->vma
3431 + symbol->section->output_offset),
3432 reloc_entry->addend);
3435 static bfd_reloc_status_type
3436 nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry,
3437 asymbol *symbol, void *data,
3438 asection *input_section, bfd *output_bfd,
3439 char **error_message ATTRIBUTE_UNUSED)
3441 /* This part is from bfd_elf_generic_reloc. */
3442 if (output_bfd != NULL
3443 && (symbol->flags & BSF_SECTION_SYM) == 0
3444 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3446 reloc_entry->address += input_section->output_offset;
3447 return bfd_reloc_ok;
3450 if (output_bfd != NULL)
3451 /* FIXME: See bfd_perform_relocation. Is this right? */
3452 return bfd_reloc_continue;
3454 return nios2_elf32_do_pcrel_lo16_relocate (
3455 abfd, reloc_entry->howto, input_section, data, reloc_entry->address,
3456 (symbol->value + symbol->section->output_section->vma
3457 + symbol->section->output_offset),
3458 reloc_entry->addend);
3461 static bfd_reloc_status_type
3462 nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry,
3463 asymbol *symbol, void *data,
3464 asection *input_section, bfd *output_bfd,
3465 char **error_message ATTRIBUTE_UNUSED)
3467 /* This part is from bfd_elf_generic_reloc. */
3468 if (output_bfd != NULL
3469 && (symbol->flags & BSF_SECTION_SYM) == 0
3470 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3472 reloc_entry->address += input_section->output_offset;
3473 return bfd_reloc_ok;
3476 if (output_bfd != NULL)
3477 /* FIXME: See bfd_perform_relocation. Is this right? */
3478 return bfd_reloc_continue;
3480 return nios2_elf32_do_pcrel_hiadj16_relocate (
3481 abfd, reloc_entry->howto, input_section, data, reloc_entry->address,
3482 (symbol->value + symbol->section->output_section->vma
3483 + symbol->section->output_offset),
3484 reloc_entry->addend);
3487 static bfd_reloc_status_type
3488 nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3489 void *data, asection *input_section,
3491 char **error_message ATTRIBUTE_UNUSED)
3493 /* This part is from bfd_elf_generic_reloc. */
3494 if (output_bfd != NULL
3495 && (symbol->flags & BSF_SECTION_SYM) == 0
3496 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3498 reloc_entry->address += input_section->output_offset;
3499 return bfd_reloc_ok;
3502 if (output_bfd != NULL)
3503 /* FIXME: See bfd_perform_relocation. Is this right? */
3504 return bfd_reloc_continue;
3506 return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto,
3508 data, reloc_entry->address,
3510 + symbol->section->output_section->vma
3511 + symbol->section->output_offset),
3512 reloc_entry->addend);
3515 static bfd_reloc_status_type
3516 nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3517 void *data, asection *input_section,
3519 char **error_message ATTRIBUTE_UNUSED)
3521 /* This part is from bfd_elf_generic_reloc. */
3522 if (output_bfd != NULL
3523 && (symbol->flags & BSF_SECTION_SYM) == 0
3524 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3526 reloc_entry->address += input_section->output_offset;
3527 return bfd_reloc_ok;
3530 if (output_bfd != NULL)
3531 /* FIXME: See bfd_perform_relocation. Is this right? */
3532 return bfd_reloc_continue;
3534 return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto,
3536 data, reloc_entry->address,
3538 + symbol->section->output_section->vma
3539 + symbol->section->output_offset),
3540 reloc_entry->addend);
3543 static bfd_reloc_status_type
3544 nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3545 void *data, asection *input_section,
3546 bfd *output_bfd, char **msg)
3550 bfd_reloc_status_type r;
3553 /* This part is from bfd_elf_generic_reloc. */
3554 if (output_bfd != NULL
3555 && (symbol->flags & BSF_SECTION_SYM) == 0
3556 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3558 reloc_entry->address += input_section->output_offset;
3559 return bfd_reloc_ok;
3562 if (output_bfd != NULL)
3563 /* FIXME: See bfd_perform_relocation. Is this right? */
3564 return bfd_reloc_continue;
3566 relocation = (symbol->value
3567 + symbol->section->output_section->vma
3568 + symbol->section->output_offset);
3570 /* This assumes we've already cached the _gp symbol. */
3571 r = nios2_elf_final_gp (abfd, symbol, FALSE, msg, &gp);
3572 if (r == bfd_reloc_ok)
3574 relocation = relocation + reloc_entry->addend - gp;
3575 reloc_entry->addend = 0;
3576 if ((signed) relocation < -32768 || (signed) relocation > 32767)
3578 *msg = _("global pointer relative address out of range");
3579 r = bfd_reloc_outofrange;
3582 r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto,
3584 data, reloc_entry->address,
3585 relocation, reloc_entry->addend);
3591 static bfd_reloc_status_type
3592 nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3593 void *data, asection *input_section,
3594 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3596 /* This part is from bfd_elf_generic_reloc. */
3597 if (output_bfd != NULL
3598 && (symbol->flags & BSF_SECTION_SYM) == 0
3599 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3601 reloc_entry->address += input_section->output_offset;
3602 return bfd_reloc_ok;
3605 if (output_bfd != NULL)
3606 /* FIXME: See bfd_perform_relocation. Is this right? */
3607 return bfd_reloc_continue;
3609 return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto,
3611 data, reloc_entry->address,
3613 + symbol->section->output_section->vma
3614 + symbol->section->output_offset),
3615 reloc_entry->addend);
3618 static bfd_reloc_status_type
3619 nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3620 void *data, asection *input_section,
3621 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3623 /* This part is from bfd_elf_generic_reloc. */
3624 if (output_bfd != NULL
3625 && (symbol->flags & BSF_SECTION_SYM) == 0
3626 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3628 reloc_entry->address += input_section->output_offset;
3629 return bfd_reloc_ok;
3632 if (output_bfd != NULL)
3633 /* FIXME: See bfd_perform_relocation. Is this right? */
3634 return bfd_reloc_continue;
3636 return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto,
3638 data, reloc_entry->address,
3640 + symbol->section->output_section->vma
3641 + symbol->section->output_offset),
3642 reloc_entry->addend);
3645 static bfd_reloc_status_type
3646 nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3647 void *data, asection *input_section,
3648 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3650 /* This part is from bfd_elf_generic_reloc. */
3651 if (output_bfd != NULL
3652 && (symbol->flags & BSF_SECTION_SYM) == 0
3653 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3655 reloc_entry->address += input_section->output_offset;
3656 return bfd_reloc_ok;
3659 if (output_bfd != NULL)
3660 /* FIXME: See bfd_perform_relocation. Is this right? */
3661 return bfd_reloc_continue;
3663 return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto,
3665 data, reloc_entry->address,
3667 + symbol->section->output_section->vma
3668 + symbol->section->output_offset),
3669 reloc_entry->addend);
3673 /* Implement elf_backend_relocate_section. */
3675 nios2_elf32_relocate_section (bfd *output_bfd,
3676 struct bfd_link_info *info,
3678 asection *input_section,
3680 Elf_Internal_Rela *relocs,
3681 Elf_Internal_Sym *local_syms,
3682 asection **local_sections)
3684 Elf_Internal_Shdr *symtab_hdr;
3685 struct elf_link_hash_entry **sym_hashes;
3686 Elf_Internal_Rela *rel;
3687 Elf_Internal_Rela *relend;
3688 struct elf32_nios2_link_hash_table *htab;
3691 asection *sreloc = NULL;
3692 bfd_vma *local_got_offsets;
3695 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3696 sym_hashes = elf_sym_hashes (input_bfd);
3697 relend = relocs + input_section->reloc_count;
3699 htab = elf32_nios2_hash_table (info);
3700 sgot = htab->root.sgot;
3701 splt = htab->root.splt;
3702 local_got_offsets = elf_local_got_offsets (input_bfd);
3704 if (htab->h_gp_got == NULL)
3707 got_base = htab->h_gp_got->root.u.def.value;
3709 for (rel = relocs; rel < relend; rel++)
3711 reloc_howto_type *howto;
3712 unsigned long r_symndx;
3713 Elf_Internal_Sym *sym;
3715 struct elf_link_hash_entry *h;
3716 struct elf32_nios2_link_hash_entry *eh;
3719 bfd_reloc_status_type r = bfd_reloc_ok;
3720 const char *name = NULL;
3724 const char* msg = (const char*) NULL;
3725 bfd_boolean unresolved_reloc;
3729 r_type = ELF32_R_TYPE (rel->r_info);
3730 r_symndx = ELF32_R_SYM (rel->r_info);
3732 howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info), output_bfd);
3737 if (r_symndx < symtab_hdr->sh_info)
3739 sym = local_syms + r_symndx;
3740 sec = local_sections[r_symndx];
3741 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3745 bfd_boolean warned, ignored;
3747 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3748 r_symndx, symtab_hdr, sym_hashes,
3750 unresolved_reloc, warned, ignored);
3753 if (sec && discarded_section (sec))
3754 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3755 rel, 1, relend, howto, 0, contents);
3757 /* Nothing more to do unless this is a final link. */
3758 if (bfd_link_relocatable (info))
3763 bfd_boolean resolved_to_zero;
3765 resolved_to_zero = (h != NULL
3766 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
3767 switch (howto->type)
3770 r = nios2_elf32_do_hi16_relocate (input_bfd, howto,
3772 contents, rel->r_offset,
3773 relocation, rel->r_addend);
3776 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
3778 contents, rel->r_offset,
3779 relocation, rel->r_addend);
3781 case R_NIOS2_PCREL_LO:
3782 r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto,
3789 case R_NIOS2_HIADJ16:
3790 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
3791 input_section, contents,
3792 rel->r_offset, relocation,
3795 case R_NIOS2_PCREL_HA:
3796 r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto,
3803 case R_NIOS2_PCREL16:
3804 r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto,
3805 input_section, contents,
3806 rel->r_offset, relocation,
3810 /* Turns an absolute address into a gp-relative address. */
3811 if (!nios2_elf_assign_gp (output_bfd, &gp, info))
3813 bfd_vma reloc_address;
3815 if (sec && sec->output_section)
3816 reloc_address = (sec->output_section->vma
3817 + sec->output_offset
3822 format = _("global pointer relative relocation at address "
3823 "0x%08x when _gp not defined\n");
3824 sprintf (msgbuf, format, reloc_address);
3826 r = bfd_reloc_dangerous;
3830 bfd_vma symbol_address = rel->r_addend + relocation;
3831 relocation = symbol_address - gp;
3833 if (((signed) relocation < -32768
3834 || (signed) relocation > 32767)
3836 || h->root.type == bfd_link_hash_defined
3837 || h->root.type == bfd_link_hash_defweak))
3840 name = h->root.root.string;
3841 /* xgettext:c-format */
3842 format = _("unable to reach %s (at 0x%08x) from the "
3843 "global pointer (at 0x%08x) because the "
3844 "offset (%d) is out of the allowed range, "
3845 "-32678 to 32767\n" );
3846 sprintf (msgbuf, format, name, symbol_address, gp,
3847 (signed)relocation);
3849 r = bfd_reloc_outofrange;
3852 r = _bfd_final_link_relocate (howto, input_bfd,
3853 input_section, contents,
3854 rel->r_offset, relocation,
3859 r = nios2_elf32_do_ujmp_relocate (input_bfd, howto,
3861 contents, rel->r_offset,
3862 relocation, rel->r_addend);
3865 r = nios2_elf32_do_cjmp_relocate (input_bfd, howto,
3867 contents, rel->r_offset,
3868 relocation, rel->r_addend);
3871 r = nios2_elf32_do_callr_relocate (input_bfd, howto,
3872 input_section, contents,
3873 rel->r_offset, relocation,
3876 case R_NIOS2_CALL26:
3877 case R_NIOS2_CALL26_NOAT:
3878 /* If we have a call to an undefined weak symbol, we just want
3879 to stuff a zero in the bits of the call instruction and
3880 bypass the normal call26 relocation handling, because it'll
3881 diagnose an overflow error if address 0 isn't in the same
3882 256MB segment as the call site. Presumably the call
3883 should be guarded by a null check anyway. */
3884 if (h != NULL && h->root.type == bfd_link_hash_undefweak)
3886 BFD_ASSERT (relocation == 0 && rel->r_addend == 0);
3887 r = _bfd_final_link_relocate (howto, input_bfd,
3888 input_section, contents,
3889 rel->r_offset, relocation,
3893 /* Handle relocations which should use the PLT entry.
3894 NIOS2_BFD_RELOC_32 relocations will use the symbol's value,
3895 which may point to a PLT entry, but we don't need to handle
3896 that here. If we created a PLT entry, all branches in this
3897 object should go to it. */
3898 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
3900 /* If we've created a .plt section, and assigned a PLT entry
3901 to this function, it should not be known to bind locally.
3902 If it were, we would have cleared the PLT entry. */
3903 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
3905 relocation = (splt->output_section->vma
3906 + splt->output_offset
3909 unresolved_reloc = FALSE;
3911 /* Detect R_NIOS2_CALL26 relocations that would overflow the
3912 256MB segment. Replace the target with a reference to a
3914 Note that htab->stub_group is null if relaxation has been
3915 disabled by the --no-relax linker command-line option, so
3916 we can use that to skip this processing entirely. */
3917 if (howto->type == R_NIOS2_CALL26 && htab->stub_group)
3919 bfd_vma dest = relocation + rel->r_addend;
3920 enum elf32_nios2_stub_type stub_type;
3922 eh = (struct elf32_nios2_link_hash_entry *)h;
3923 stub_type = nios2_type_of_stub (input_section, rel, eh,
3926 if (stub_type != nios2_stub_none)
3928 struct elf32_nios2_stub_hash_entry *hsh;
3930 hsh = nios2_get_stub_entry (input_section, sec,
3931 eh, rel, htab, stub_type);
3934 r = bfd_reloc_undefined;
3938 dest = (hsh->stub_offset
3939 + hsh->stub_sec->output_offset
3940 + hsh->stub_sec->output_section->vma);
3941 r = nios2_elf32_do_call26_relocate (input_bfd, howto,
3951 r = nios2_elf32_do_call26_relocate (input_bfd, howto,
3952 input_section, contents,
3953 rel->r_offset, relocation,
3958 /* For symmetry this would be
3959 r = nios2_elf32_do_ignore_reloc (input_bfd, howto,
3960 input_section, contents,
3961 rel->r_offset, relocation,
3963 but do_ignore_reloc would do no more than return
3968 case R_NIOS2_CALL16:
3969 case R_NIOS2_GOT_LO:
3970 case R_NIOS2_GOT_HA:
3971 case R_NIOS2_CALL_LO:
3972 case R_NIOS2_CALL_HA:
3973 /* Relocation is to the entry for this symbol in the
3974 global offset table. */
3977 r = bfd_reloc_notsupported;
3987 eh = (struct elf32_nios2_link_hash_entry *)h;
3988 use_plt = (eh->got_types_used == CALL_USED
3989 && h->plt.offset != (bfd_vma) -1);
3991 off = h->got.offset;
3992 BFD_ASSERT (off != (bfd_vma) -1);
3993 dyn = htab->root.dynamic_sections_created;
3994 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3995 bfd_link_pic (info),
3997 || (bfd_link_pic (info)
3998 && SYMBOL_REFERENCES_LOCAL (info, h))
3999 || ((ELF_ST_VISIBILITY (h->other)
4000 || resolved_to_zero)
4001 && h->root.type == bfd_link_hash_undefweak))
4003 /* This is actually a static link, or it is a -Bsymbolic
4004 link and the symbol is defined locally. We must
4005 initialize this entry in the global offset table.
4006 Since the offset must always be a multiple of 4, we
4007 use the least significant bit to record whether we
4008 have initialized it already.
4010 When doing a dynamic link, we create a .rela.got
4011 relocation entry to initialize the value. This is
4012 done in the finish_dynamic_symbol routine. */
4017 bfd_put_32 (output_bfd, relocation,
4018 sgot->contents + off);
4023 unresolved_reloc = FALSE;
4027 BFD_ASSERT (local_got_offsets != NULL
4028 && local_got_offsets[r_symndx] != (bfd_vma) -1);
4030 off = local_got_offsets[r_symndx];
4032 /* The offset must always be a multiple of 4. We use the
4033 least significant bit to record whether we have already
4034 generated the necessary reloc. */
4039 bfd_put_32 (output_bfd, relocation,
4040 sgot->contents + off);
4042 if (bfd_link_pic (info))
4045 Elf_Internal_Rela outrel;
4048 srelgot = htab->root.srelgot;
4049 BFD_ASSERT (srelgot != NULL);
4051 outrel.r_addend = relocation;
4052 outrel.r_offset = (sgot->output_section->vma
4053 + sgot->output_offset
4055 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
4056 loc = srelgot->contents;
4057 loc += (srelgot->reloc_count++ *
4058 sizeof (Elf32_External_Rela));
4059 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4062 local_got_offsets[r_symndx] |= 1;
4066 if (use_plt && bfd_link_pic (info))
4068 off = ((h->plt.offset - 24) / 12 + 3) * 4;
4069 relocation = (htab->root.sgotplt->output_offset + off
4073 relocation = sgot->output_offset + off - got_base;
4075 /* This relocation does not use the addend. */
4078 switch (howto->type)
4080 case R_NIOS2_GOT_LO:
4081 case R_NIOS2_CALL_LO:
4082 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
4083 input_section, contents,
4084 rel->r_offset, relocation,
4087 case R_NIOS2_GOT_HA:
4088 case R_NIOS2_CALL_HA:
4089 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
4090 input_section, contents,
4096 r = _bfd_final_link_relocate (howto, input_bfd,
4097 input_section, contents,
4098 rel->r_offset, relocation,
4104 case R_NIOS2_GOTOFF_LO:
4105 case R_NIOS2_GOTOFF_HA:
4106 case R_NIOS2_GOTOFF:
4107 /* Relocation is relative to the global offset table pointer. */
4109 BFD_ASSERT (sgot != NULL);
4112 r = bfd_reloc_notsupported;
4116 /* Note that sgot->output_offset is not involved in this
4117 calculation. We always want the start of .got. */
4118 relocation -= sgot->output_section->vma;
4120 /* Now we adjust the relocation to be relative to the GOT pointer
4121 (the _gp_got symbol), which possibly contains the 0x8000 bias. */
4122 relocation -= got_base;
4124 switch (howto->type)
4126 case R_NIOS2_GOTOFF_LO:
4127 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
4128 input_section, contents,
4129 rel->r_offset, relocation,
4132 case R_NIOS2_GOTOFF_HA:
4133 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
4134 input_section, contents,
4140 r = _bfd_final_link_relocate (howto, input_bfd,
4141 input_section, contents,
4142 rel->r_offset, relocation,
4148 case R_NIOS2_TLS_LDO16:
4149 relocation -= dtpoff_base (info) + DTP_OFFSET;
4151 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4152 contents, rel->r_offset,
4153 relocation, rel->r_addend);
4155 case R_NIOS2_TLS_LDM16:
4156 if (htab->root.sgot == NULL)
4159 off = htab->tls_ldm_got.offset;
4165 /* If we don't know the module number, create a relocation
4167 if (bfd_link_pic (info))
4169 Elf_Internal_Rela outrel;
4172 if (htab->root.srelgot == NULL)
4175 outrel.r_addend = 0;
4176 outrel.r_offset = (htab->root.sgot->output_section->vma
4177 + htab->root.sgot->output_offset
4179 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD);
4181 loc = htab->root.srelgot->contents;
4182 loc += (htab->root.srelgot->reloc_count++
4183 * sizeof (Elf32_External_Rela));
4184 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4187 bfd_put_32 (output_bfd, 1,
4188 htab->root.sgot->contents + off);
4190 htab->tls_ldm_got.offset |= 1;
4193 relocation = htab->root.sgot->output_offset + off - got_base;
4195 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4196 contents, rel->r_offset,
4197 relocation, rel->r_addend);
4200 case R_NIOS2_TLS_GD16:
4201 case R_NIOS2_TLS_IE16:
4206 if (htab->root.sgot == NULL)
4213 dyn = htab->root.dynamic_sections_created;
4214 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4215 bfd_link_pic (info),
4217 && (!bfd_link_pic (info)
4218 || !SYMBOL_REFERENCES_LOCAL (info, h)))
4220 unresolved_reloc = FALSE;
4223 off = h->got.offset;
4224 tls_type = (((struct elf32_nios2_link_hash_entry *) h)
4229 if (local_got_offsets == NULL)
4231 off = local_got_offsets[r_symndx];
4232 tls_type = (elf32_nios2_local_got_tls_type (input_bfd)
4236 if (tls_type == GOT_UNKNOWN)
4243 bfd_boolean need_relocs = FALSE;
4244 Elf_Internal_Rela outrel;
4245 bfd_byte *loc = NULL;
4248 /* The GOT entries have not been initialized yet. Do it
4249 now, and emit any relocations. If both an IE GOT and a
4250 GD GOT are necessary, we emit the GD first. */
4252 if ((bfd_link_pic (info) || indx != 0)
4254 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4255 && !resolved_to_zero)
4256 || h->root.type != bfd_link_hash_undefweak))
4259 if (htab->root.srelgot == NULL)
4261 loc = htab->root.srelgot->contents;
4262 loc += (htab->root.srelgot->reloc_count *
4263 sizeof (Elf32_External_Rela));
4266 if (tls_type & GOT_TLS_GD)
4270 outrel.r_addend = 0;
4271 outrel.r_offset = (htab->root.sgot->output_section->vma
4272 + htab->root.sgot->output_offset
4274 outrel.r_info = ELF32_R_INFO (indx,
4275 R_NIOS2_TLS_DTPMOD);
4277 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4279 htab->root.srelgot->reloc_count++;
4280 loc += sizeof (Elf32_External_Rela);
4283 bfd_put_32 (output_bfd,
4284 (relocation - dtpoff_base (info) -
4286 htab->root.sgot->contents + cur_off + 4);
4289 outrel.r_addend = 0;
4290 outrel.r_info = ELF32_R_INFO (indx,
4291 R_NIOS2_TLS_DTPREL);
4292 outrel.r_offset += 4;
4294 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4296 htab->root.srelgot->reloc_count++;
4297 loc += sizeof (Elf32_External_Rela);
4302 /* If we are not emitting relocations for a
4303 general dynamic reference, then we must be in a
4304 static link or an executable link with the
4305 symbol binding locally. Mark it as belonging
4306 to module 1, the executable. */
4307 bfd_put_32 (output_bfd, 1,
4308 htab->root.sgot->contents + cur_off);
4309 bfd_put_32 (output_bfd, (relocation -
4310 dtpoff_base (info) -
4312 htab->root.sgot->contents + cur_off + 4);
4318 if (tls_type & GOT_TLS_IE)
4323 outrel.r_addend = (relocation -
4324 dtpoff_base (info));
4326 outrel.r_addend = 0;
4327 outrel.r_offset = (htab->root.sgot->output_section->vma
4328 + htab->root.sgot->output_offset
4330 outrel.r_info = ELF32_R_INFO (indx,
4333 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4335 htab->root.srelgot->reloc_count++;
4336 loc += sizeof (Elf32_External_Rela);
4339 bfd_put_32 (output_bfd, (tpoff (info, relocation)
4341 htab->root.sgot->contents + cur_off);
4348 local_got_offsets[r_symndx] |= 1;
4351 if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16)
4353 relocation = htab->root.sgot->output_offset + off - got_base;
4355 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4356 contents, rel->r_offset,
4357 relocation, rel->r_addend);
4361 case R_NIOS2_TLS_LE16:
4362 if (bfd_link_dll (info))
4365 /* xgettext:c-format */
4366 (_("%pB(%pA+%#" PRIx64 "): %s relocation not "
4367 "permitted in shared object"),
4368 input_bfd, input_section,
4369 (uint64_t) rel->r_offset, howto->name);
4373 relocation = tpoff (info, relocation) - TP_OFFSET;
4375 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4376 contents, rel->r_offset,
4377 relocation, rel->r_addend);
4380 case R_NIOS2_BFD_RELOC_32:
4381 if (bfd_link_pic (info)
4382 && (input_section->flags & SEC_ALLOC) != 0
4384 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4385 && !resolved_to_zero)
4386 || h->root.type != bfd_link_hash_undefweak))
4388 Elf_Internal_Rela outrel;
4390 bfd_boolean skip, relocate;
4392 /* When generating a shared object, these relocations
4393 are copied into the output file to be resolved at run
4400 = _bfd_elf_section_offset (output_bfd, info,
4401 input_section, rel->r_offset);
4402 if (outrel.r_offset == (bfd_vma) -1)
4404 else if (outrel.r_offset == (bfd_vma) -2)
4405 skip = TRUE, relocate = TRUE;
4406 outrel.r_offset += (input_section->output_section->vma
4407 + input_section->output_offset);
4410 memset (&outrel, 0, sizeof outrel);
4413 && (!bfd_link_pic (info)
4414 || !SYMBOLIC_BIND (info, h)
4415 || !h->def_regular))
4417 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4418 outrel.r_addend = rel->r_addend;
4422 /* This symbol is local, or marked to become local. */
4423 outrel.r_addend = relocation + rel->r_addend;
4425 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
4428 sreloc = elf_section_data (input_section)->sreloc;
4432 loc = sreloc->contents;
4433 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4434 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4436 /* This reloc will be computed at runtime, so there's no
4437 need to do anything now, except for R_NIOS2_BFD_RELOC_32
4438 relocations that have been turned into
4439 R_NIOS2_RELATIVE. */
4444 r = _bfd_final_link_relocate (howto, input_bfd,
4445 input_section, contents,
4446 rel->r_offset, relocation,
4450 case R_NIOS2_TLS_DTPREL:
4451 relocation -= dtpoff_base (info);
4455 r = _bfd_final_link_relocate (howto, input_bfd,
4456 input_section, contents,
4457 rel->r_offset, relocation,
4463 r = bfd_reloc_notsupported;
4465 if (r != bfd_reloc_ok)
4468 name = h->root.root.string;
4471 name = bfd_elf_string_from_elf_section (input_bfd,
4472 symtab_hdr->sh_link,
4474 if (name == NULL || *name == '\0')
4475 name = bfd_section_name (input_bfd, sec);
4480 case bfd_reloc_overflow:
4481 (*info->callbacks->reloc_overflow) (info, NULL, name,
4482 howto->name, (bfd_vma) 0,
4483 input_bfd, input_section,
4487 case bfd_reloc_undefined:
4488 (*info->callbacks->undefined_symbol) (info, name, input_bfd,
4490 rel->r_offset, TRUE);
4493 case bfd_reloc_outofrange:
4495 msg = _("relocation out of range");
4498 case bfd_reloc_notsupported:
4500 msg = _("unsupported relocation");
4503 case bfd_reloc_dangerous:
4505 msg = _("dangerous relocation");
4510 msg = _("unknown error");
4516 (*info->callbacks->warning) (info, msg, name, input_bfd,
4517 input_section, rel->r_offset);
4525 /* Implement elf-backend_section_flags:
4526 Convert NIOS2 specific section flags to bfd internal section flags. */
4528 nios2_elf32_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
4530 if (hdr->sh_flags & SHF_NIOS2_GPREL)
4531 *flags |= SEC_SMALL_DATA;
4536 /* Implement elf_backend_fake_sections:
4537 Set the correct type for an NIOS2 ELF section. We do this by the
4538 section name, which is a hack, but ought to work. */
4540 nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
4541 Elf_Internal_Shdr *hdr, asection *sec)
4543 register const char *name = bfd_get_section_name (abfd, sec);
4545 if ((sec->flags & SEC_SMALL_DATA)
4546 || strcmp (name, ".sdata") == 0
4547 || strcmp (name, ".sbss") == 0
4548 || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0)
4549 hdr->sh_flags |= SHF_NIOS2_GPREL;
4554 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
4555 shortcuts to them in our hash table. */
4557 create_got_section (bfd *dynobj, struct bfd_link_info *info)
4559 struct elf32_nios2_link_hash_table *htab;
4560 struct elf_link_hash_entry *h;
4562 htab = elf32_nios2_hash_table (info);
4564 if (! _bfd_elf_create_got_section (dynobj, info))
4567 /* In order for the two loads in .PLTresolve to share the same %hiadj,
4568 _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */
4569 if (!bfd_set_section_alignment (dynobj, htab->root.sgotplt, 4))
4572 /* The Nios II ABI specifies that GOT-relative relocations are relative
4573 to the linker-created symbol _gp_got, rather than using
4574 _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always
4575 points to the base of the GOT while _gp_got may include a bias. */
4576 h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.sgotplt,
4585 /* Implement elf_backend_create_dynamic_sections:
4586 Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
4587 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
4590 nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4592 struct elf32_nios2_link_hash_table *htab;
4594 htab = elf32_nios2_hash_table (info);
4595 if (!htab->root.sgot && !create_got_section (dynobj, info))
4598 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4601 /* In order for the two loads in a shared object .PLTresolve to share the
4602 same %hiadj, the start of the PLT (as well as the GOT) must be aligned
4603 to a 16-byte boundary. This is because the addresses for these loads
4604 include the -(.plt+4) PIC correction. */
4605 return bfd_set_section_alignment (dynobj, htab->root.splt, 4);
4608 /* Implement elf_backend_copy_indirect_symbol:
4609 Copy the extra info we tack onto an elf_link_hash_entry. */
4611 nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info,
4612 struct elf_link_hash_entry *dir,
4613 struct elf_link_hash_entry *ind)
4615 struct elf32_nios2_link_hash_entry *edir, *eind;
4617 edir = (struct elf32_nios2_link_hash_entry *) dir;
4618 eind = (struct elf32_nios2_link_hash_entry *) ind;
4620 if (eind->dyn_relocs != NULL)
4622 if (edir->dyn_relocs != NULL)
4624 struct elf_dyn_relocs **pp;
4625 struct elf_dyn_relocs *p;
4627 /* Add reloc counts against the indirect sym to the direct sym
4628 list. Merge any entries against the same section. */
4629 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4631 struct elf_dyn_relocs *q;
4633 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4634 if (q->sec == p->sec)
4636 q->pc_count += p->pc_count;
4637 q->count += p->count;
4644 *pp = edir->dyn_relocs;
4647 edir->dyn_relocs = eind->dyn_relocs;
4648 eind->dyn_relocs = NULL;
4651 if (ind->root.type == bfd_link_hash_indirect
4652 && dir->got.refcount <= 0)
4654 edir->tls_type = eind->tls_type;
4655 eind->tls_type = GOT_UNKNOWN;
4658 edir->got_types_used |= eind->got_types_used;
4660 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
4663 /* Set the right machine number for a NIOS2 ELF file. */
4666 nios2_elf32_object_p (bfd *abfd)
4670 mach = elf_elfheader (abfd)->e_flags;
4675 case EF_NIOS2_ARCH_R1:
4676 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r1);
4678 case EF_NIOS2_ARCH_R2:
4679 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r2);
4686 /* Implement elf_backend_check_relocs:
4687 Look through the relocs for a section during the first phase. */
4689 nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info,
4690 asection *sec, const Elf_Internal_Rela *relocs)
4692 Elf_Internal_Shdr *symtab_hdr;
4693 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4694 const Elf_Internal_Rela *rel;
4695 const Elf_Internal_Rela *rel_end;
4696 struct elf32_nios2_link_hash_table *htab;
4697 asection *sreloc = NULL;
4698 bfd_signed_vma *local_got_refcounts;
4700 if (bfd_link_relocatable (info))
4703 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4704 sym_hashes = elf_sym_hashes (abfd);
4705 sym_hashes_end = (sym_hashes
4706 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
4707 if (!elf_bad_symtab (abfd))
4708 sym_hashes_end -= symtab_hdr->sh_info;
4709 local_got_refcounts = elf_local_got_refcounts (abfd);
4711 htab = elf32_nios2_hash_table (info);
4713 rel_end = relocs + sec->reloc_count;
4714 for (rel = relocs; rel < rel_end; rel++)
4716 unsigned int r_type;
4717 struct elf_link_hash_entry *h;
4718 unsigned long r_symndx;
4720 r_symndx = ELF32_R_SYM (rel->r_info);
4721 if (r_symndx < symtab_hdr->sh_info)
4725 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4726 while (h->root.type == bfd_link_hash_indirect
4727 || h->root.type == bfd_link_hash_warning)
4728 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4731 r_type = ELF32_R_TYPE (rel->r_info);
4736 case R_NIOS2_GOT_LO:
4737 case R_NIOS2_GOT_HA:
4738 case R_NIOS2_CALL16:
4739 case R_NIOS2_CALL_LO:
4740 case R_NIOS2_CALL_HA:
4741 case R_NIOS2_TLS_GD16:
4742 case R_NIOS2_TLS_IE16:
4743 /* This symbol requires a global offset table entry. */
4745 int tls_type, old_tls_type;
4751 case R_NIOS2_GOT_LO:
4752 case R_NIOS2_GOT_HA:
4753 case R_NIOS2_CALL16:
4754 case R_NIOS2_CALL_LO:
4755 case R_NIOS2_CALL_HA:
4756 tls_type = GOT_NORMAL;
4758 case R_NIOS2_TLS_GD16:
4759 tls_type = GOT_TLS_GD;
4761 case R_NIOS2_TLS_IE16:
4762 tls_type = GOT_TLS_IE;
4768 struct elf32_nios2_link_hash_entry *eh
4769 = (struct elf32_nios2_link_hash_entry *)h;
4771 old_tls_type = elf32_nios2_hash_entry(h)->tls_type;
4772 if (r_type == R_NIOS2_CALL16
4773 || r_type == R_NIOS2_CALL_LO
4774 || r_type == R_NIOS2_CALL_HA)
4776 /* Make sure a plt entry is created for this symbol if
4777 it turns out to be a function defined by a dynamic
4782 eh->got_types_used |= CALL_USED;
4785 eh->got_types_used |= GOT_USED;
4789 /* This is a global offset table entry for a local symbol. */
4790 if (local_got_refcounts == NULL)
4794 size = symtab_hdr->sh_info;
4795 size *= (sizeof (bfd_signed_vma) + sizeof (char));
4797 = ((bfd_signed_vma *) bfd_zalloc (abfd, size));
4798 if (local_got_refcounts == NULL)
4800 elf_local_got_refcounts (abfd) = local_got_refcounts;
4801 elf32_nios2_local_got_tls_type (abfd)
4802 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
4804 local_got_refcounts[r_symndx]++;
4805 old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx];
4808 /* We will already have issued an error message if there is a
4809 TLS / non-TLS mismatch, based on the symbol type. We don't
4810 support any linker relaxations. So just combine any TLS
4812 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
4813 && tls_type != GOT_NORMAL)
4814 tls_type |= old_tls_type;
4816 if (old_tls_type != tls_type)
4819 elf32_nios2_hash_entry (h)->tls_type = tls_type;
4821 elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type;
4825 if (htab->root.sgot == NULL)
4827 if (htab->root.dynobj == NULL)
4828 htab->root.dynobj = abfd;
4829 if (!create_got_section (htab->root.dynobj, info))
4834 case R_NIOS2_TLS_LDM16:
4835 htab->tls_ldm_got.refcount++;
4838 /* This relocation describes the C++ object vtable hierarchy.
4839 Reconstruct it for later use during GC. */
4840 case R_NIOS2_GNU_VTINHERIT:
4841 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4845 /* This relocation describes which C++ vtable entries are actually
4846 used. Record for later use during GC. */
4847 case R_NIOS2_GNU_VTENTRY:
4848 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4852 case R_NIOS2_BFD_RELOC_32:
4853 case R_NIOS2_CALL26:
4854 case R_NIOS2_CALL26_NOAT:
4855 case R_NIOS2_HIADJ16:
4860 /* If this reloc is in a read-only section, we might
4861 need a copy reloc. We can't check reliably at this
4862 stage whether the section is read-only, as input
4863 sections have not yet been mapped to output sections.
4864 Tentatively set the flag for now, and correct in
4865 adjust_dynamic_symbol. */
4866 if (!bfd_link_pic (info))
4869 /* Make sure a plt entry is created for this symbol if it
4870 turns out to be a function defined by a dynamic object. */
4873 if (r_type == R_NIOS2_CALL26 || r_type == R_NIOS2_CALL26_NOAT)
4877 /* If we are creating a shared library, we need to copy the
4878 reloc into the shared library. */
4879 if (bfd_link_pic (info)
4880 && (sec->flags & SEC_ALLOC) != 0
4881 && (r_type == R_NIOS2_BFD_RELOC_32
4882 || (h != NULL && ! h->needs_plt
4883 && (! SYMBOLIC_BIND (info, h) || ! h->def_regular))))
4885 struct elf_dyn_relocs *p;
4886 struct elf_dyn_relocs **head;
4888 /* When creating a shared object, we must copy these
4889 reloc types into the output file. We create a reloc
4890 section in dynobj and make room for this reloc. */
4893 if (htab->root.dynobj == NULL)
4894 htab->root.dynobj = abfd;
4896 sreloc = _bfd_elf_make_dynamic_reloc_section
4897 (sec, htab->root.dynobj, 2, abfd, TRUE);
4902 /* If this is a global symbol, we count the number of
4903 relocations we need for this symbol. */
4905 head = &((struct elf32_nios2_link_hash_entry *) h)->dyn_relocs;
4908 /* Track dynamic relocs needed for local syms too.
4909 We really need local syms available to do this
4914 Elf_Internal_Sym *isym;
4916 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4921 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4925 vpp = &elf_section_data (s)->local_dynrel;
4926 head = (struct elf_dyn_relocs **) vpp;
4930 if (p == NULL || p->sec != sec)
4932 bfd_size_type amt = sizeof *p;
4933 p = ((struct elf_dyn_relocs *)
4934 bfd_alloc (htab->root.dynobj, amt));
4955 /* Implement elf_backend_gc_mark_hook:
4956 Return the section that should be marked against GC for a given
4959 nios2_elf32_gc_mark_hook (asection *sec,
4960 struct bfd_link_info *info,
4961 Elf_Internal_Rela *rel,
4962 struct elf_link_hash_entry *h,
4963 Elf_Internal_Sym *sym)
4966 switch (ELF32_R_TYPE (rel->r_info))
4968 case R_NIOS2_GNU_VTINHERIT:
4969 case R_NIOS2_GNU_VTENTRY:
4972 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4975 /* Implement elf_backend_finish_dynamic_symbols:
4976 Finish up dynamic symbol handling. We set the contents of various
4977 dynamic sections here. */
4979 nios2_elf32_finish_dynamic_symbol (bfd *output_bfd,
4980 struct bfd_link_info *info,
4981 struct elf_link_hash_entry *h,
4982 Elf_Internal_Sym *sym)
4984 struct elf32_nios2_link_hash_table *htab;
4985 struct elf32_nios2_link_hash_entry *eh
4986 = (struct elf32_nios2_link_hash_entry *)h;
4989 htab = elf32_nios2_hash_table (info);
4991 if (h->plt.offset != (bfd_vma) -1)
4998 Elf_Internal_Rela rela;
5000 bfd_vma got_address;
5002 /* This symbol has an entry in the procedure linkage table. Set
5004 BFD_ASSERT (h->dynindx != -1);
5005 splt = htab->root.splt;
5006 sgotplt = htab->root.sgotplt;
5007 srela = htab->root.srelplt;
5008 BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL);
5010 /* Emit the PLT entry. */
5011 if (bfd_link_pic (info))
5013 nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset,
5015 plt_index = (h->plt.offset - 24) / 12;
5016 got_offset = (plt_index + 3) * 4;
5017 nios2_elf32_install_imm16 (splt, h->plt.offset,
5018 hiadj(plt_index * 4));
5019 nios2_elf32_install_imm16 (splt, h->plt.offset + 4,
5020 (plt_index * 4) & 0xffff);
5021 nios2_elf32_install_imm16 (splt, h->plt.offset + 8,
5022 0xfff4 - h->plt.offset);
5023 got_address = (sgotplt->output_section->vma + sgotplt->output_offset
5026 /* Fill in the entry in the global offset table. There are no
5027 res_n slots for a shared object PLT, instead the .got.plt entries
5028 point to the PLT entries. */
5029 bfd_put_32 (output_bfd,
5030 splt->output_section->vma + splt->output_offset
5031 + h->plt.offset, sgotplt->contents + got_offset);
5035 plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12;
5036 got_offset = (plt_index + 3) * 4;
5038 nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3);
5039 got_address = (sgotplt->output_section->vma + sgotplt->output_offset
5041 nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address));
5042 nios2_elf32_install_imm16 (splt, h->plt.offset + 4,
5043 got_address & 0xffff);
5045 /* Fill in the entry in the global offset table. */
5046 bfd_put_32 (output_bfd,
5047 splt->output_section->vma + splt->output_offset
5048 + plt_index * 4, sgotplt->contents + got_offset);
5051 /* Fill in the entry in the .rela.plt section. */
5052 rela.r_offset = got_address;
5053 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT);
5055 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
5056 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5058 if (!h->def_regular)
5060 /* Mark the symbol as undefined, rather than as defined in
5061 the .plt section. Leave the value alone. */
5062 sym->st_shndx = SHN_UNDEF;
5063 /* If the symbol is weak, we do need to clear the value.
5064 Otherwise, the PLT entry would provide a definition for
5065 the symbol even if the symbol wasn't defined anywhere,
5066 and so the symbol would never be NULL. */
5067 if (!h->ref_regular_nonweak)
5072 use_plt = (eh->got_types_used == CALL_USED
5073 && h->plt.offset != (bfd_vma) -1);
5075 if (!use_plt && h->got.offset != (bfd_vma) -1
5076 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
5077 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
5081 Elf_Internal_Rela rela;
5085 /* This symbol has an entry in the global offset table. Set it
5087 sgot = htab->root.sgot;
5088 srela = htab->root.srelgot;
5089 BFD_ASSERT (sgot != NULL && srela != NULL);
5091 offset = (h->got.offset & ~(bfd_vma) 1);
5092 rela.r_offset = (sgot->output_section->vma
5093 + sgot->output_offset + offset);
5095 /* If this is a -Bsymbolic link, and the symbol is defined
5096 locally, we just want to emit a RELATIVE reloc. Likewise if
5097 the symbol was forced to be local because of a version file.
5098 The entry in the global offset table will already have been
5099 initialized in the relocate_section function. */
5101 if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
5103 rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
5104 rela.r_addend = bfd_get_signed_32 (output_bfd,
5105 (sgot->contents + offset));
5106 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
5110 bfd_put_32 (output_bfd, (bfd_vma) 0,
5111 sgot->contents + offset);
5112 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_GLOB_DAT);
5116 loc = srela->contents;
5117 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5118 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5121 if (use_plt && h->got.offset != (bfd_vma) -1)
5123 bfd_vma offset = (h->got.offset & ~(bfd_vma) 1);
5124 asection *sgot = htab->root.sgot;
5125 asection *splt = htab->root.splt;
5126 bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset
5128 sgot->contents + offset);
5134 Elf_Internal_Rela rela;
5137 /* This symbol needs a copy reloc. Set it up. */
5138 BFD_ASSERT (h->dynindx != -1
5139 && (h->root.type == bfd_link_hash_defined
5140 || h->root.type == bfd_link_hash_defweak));
5142 rela.r_offset = (h->root.u.def.value
5143 + h->root.u.def.section->output_section->vma
5144 + h->root.u.def.section->output_offset);
5145 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY);
5147 if (h->root.u.def.section == htab->root.sdynrelro)
5148 s = htab->root.sreldynrelro;
5150 s = htab->root.srelbss;
5151 BFD_ASSERT (s != NULL);
5152 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
5153 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5156 /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */
5157 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5158 || h == htab->root.hgot
5159 || h == htab->h_gp_got)
5160 sym->st_shndx = SHN_ABS;
5165 /* Implement elf_backend_finish_dynamic_sections. */
5167 nios2_elf32_finish_dynamic_sections (bfd *output_bfd,
5168 struct bfd_link_info *info)
5172 struct elf32_nios2_link_hash_table *htab;
5174 htab = elf32_nios2_hash_table (info);
5175 sgotplt = htab->root.sgotplt;
5178 if (htab->root.dynamic_sections_created)
5181 Elf32_External_Dyn *dyncon, *dynconend;
5183 splt = htab->root.splt;
5184 sdyn = bfd_get_linker_section (htab->root.dynobj, ".dynamic");
5185 BFD_ASSERT (splt != NULL && sdyn != NULL && sgotplt != NULL);
5187 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5188 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5189 for (; dyncon < dynconend; dyncon++)
5191 Elf_Internal_Dyn dyn;
5194 bfd_elf32_swap_dyn_in (htab->root.dynobj, dyncon, &dyn);
5202 s = htab->root.sgotplt;
5203 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5204 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5208 s = htab->root.srelplt;
5209 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5210 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5214 s = htab->root.srelplt;
5215 dyn.d_un.d_val = s->size;
5216 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5220 s = htab->root.sgotplt;
5222 = s->output_section->vma + s->output_offset + 0x7ff0;
5223 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5228 /* Fill in the first entry in the procedure linkage table. */
5231 bfd_vma got_address = (sgotplt->output_section->vma
5232 + sgotplt->output_offset);
5233 if (bfd_link_pic (info))
5235 bfd_vma got_pcrel = got_address - (splt->output_section->vma
5236 + splt->output_offset);
5237 /* Both GOT and PLT must be aligned to a 16-byte boundary
5238 for the two loads to share the %hiadj part. The 4-byte
5239 offset for nextpc is accounted for in the %lo offsets
5241 BFD_ASSERT ((got_pcrel & 0xf) == 0);
5242 nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6);
5243 nios2_elf32_install_imm16 (splt, 4, hiadj (got_pcrel));
5244 nios2_elf32_install_imm16 (splt, 12, got_pcrel & 0xffff);
5245 nios2_elf32_install_imm16 (splt, 16, (got_pcrel + 4) & 0xffff);
5249 /* Divide by 4 here, not 3 because we already corrected for the
5251 bfd_vma res_size = (splt->size - 28) / 4;
5252 bfd_vma res_start = (splt->output_section->vma
5253 + splt->output_offset);
5256 for (res_offset = 0; res_offset < res_size; res_offset += 4)
5257 bfd_put_32 (output_bfd,
5258 6 | ((res_size - (res_offset + 4)) << 6),
5259 splt->contents + res_offset);
5261 /* The GOT must be aligned to a 16-byte boundary for the
5262 two loads to share the same %hiadj part. */
5263 BFD_ASSERT ((got_address & 0xf) == 0);
5265 nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7);
5266 nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start));
5267 nios2_elf32_install_imm16 (splt, res_size + 4,
5268 res_start & 0xffff);
5269 nios2_elf32_install_imm16 (splt, res_size + 12,
5270 hiadj (got_address));
5271 nios2_elf32_install_imm16 (splt, res_size + 16,
5272 (got_address + 4) & 0xffff);
5273 nios2_elf32_install_imm16 (splt, res_size + 20,
5274 (got_address + 8) & 0xffff);
5279 /* Fill in the first three entries in the global offset table. */
5280 if (sgotplt != NULL && sgotplt->size > 0)
5283 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents);
5285 bfd_put_32 (output_bfd,
5286 sdyn->output_section->vma + sdyn->output_offset,
5288 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4);
5289 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8);
5291 if (sgotplt->output_section != bfd_abs_section_ptr)
5292 elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4;
5298 /* Implement elf_backend_adjust_dynamic_symbol:
5299 Adjust a symbol defined by a dynamic object and referenced by a
5300 regular object. The current definition is in some section of the
5301 dynamic object, but we're not including those sections. We have to
5302 change the definition to something the rest of the link can
5305 nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info,
5306 struct elf_link_hash_entry *h)
5308 struct elf32_nios2_link_hash_table *htab;
5313 htab = elf32_nios2_hash_table (info);
5314 dynobj = htab->root.dynobj;
5316 /* Make sure we know what is going on here. */
5317 BFD_ASSERT (dynobj != NULL
5322 && !h->def_regular)));
5324 /* If this is a function, put it in the procedure linkage table. We
5325 will fill in the contents of the procedure linkage table later,
5326 when we know the address of the .got section. */
5327 if (h->type == STT_FUNC || h->needs_plt)
5329 if (h->plt.refcount <= 0
5330 || SYMBOL_CALLS_LOCAL (info, h)
5331 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5332 && h->root.type == bfd_link_hash_undefweak))
5334 /* This case can occur if we saw a PLT reloc in an input
5335 file, but the symbol was never referred to by a dynamic
5336 object, or if all references were garbage collected. In
5337 such a case, we don't actually need to build a procedure
5338 linkage table, and we can just do a PCREL reloc instead. */
5339 h->plt.offset = (bfd_vma) -1;
5346 /* Reinitialize the plt offset now that it is not used as a reference
5348 h->plt.offset = (bfd_vma) -1;
5350 /* If this is a weak symbol, and there is a real definition, the
5351 processor independent code will have arranged for us to see the
5352 real definition first, and we can just use the same value. */
5353 if (h->is_weakalias)
5355 struct elf_link_hash_entry *def = weakdef (h);
5356 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5357 h->root.u.def.section = def->root.u.def.section;
5358 h->root.u.def.value = def->root.u.def.value;
5362 /* If there are no non-GOT references, we do not need a copy
5364 if (!h->non_got_ref)
5367 /* This is a reference to a symbol defined by a dynamic object which
5369 If we are creating a shared library, we must presume that the
5370 only references to the symbol are via the global offset table.
5371 For such cases we need not do anything here; the relocations will
5372 be handled correctly by relocate_section. */
5373 if (bfd_link_pic (info))
5378 _bfd_error_handler (_("dynamic variable `%s' is zero size"),
5379 h->root.root.string);
5383 /* We must allocate the symbol in our .dynbss section, which will
5384 become part of the .bss section of the executable. There will be
5385 an entry for this symbol in the .dynsym section. The dynamic
5386 object will contain position independent code, so all references
5387 from the dynamic object to this symbol will go through the global
5388 offset table. The dynamic linker will use the .dynsym entry to
5389 determine the address it must put in the global offset table, so
5390 both the dynamic object and the regular object will refer to the
5391 same memory location for the variable. */
5392 /* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to
5393 copy the initial value out of the dynamic object and into the
5394 runtime process image. We need to remember the offset into the
5395 .rela.bss section we are going to use. */
5396 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5398 s = htab->root.sdynrelro;
5399 srel = htab->root.sreldynrelro;
5403 s = htab->root.sdynbss;
5404 srel = htab->root.srelbss;
5406 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5408 srel->size += sizeof (Elf32_External_Rela);
5412 align2 = bfd_log2 (h->size);
5413 if (align2 > h->root.u.def.section->alignment_power)
5414 align2 = h->root.u.def.section->alignment_power;
5417 s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2);
5418 if (align2 > bfd_get_section_alignment (dynobj, s)
5419 && !bfd_set_section_alignment (dynobj, s, align2))
5422 /* Define the symbol as being at this point in the section. */
5423 h->root.u.def.section = s;
5424 h->root.u.def.value = s->size;
5426 /* Increment the section size to make room for the symbol. */
5432 /* Worker function for nios2_elf32_size_dynamic_sections. */
5434 adjust_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5436 struct bfd_link_info *info;
5437 struct elf32_nios2_link_hash_table *htab;
5439 if (h->root.type == bfd_link_hash_indirect)
5442 if (h->root.type == bfd_link_hash_warning)
5443 /* When warning symbols are created, they **replace** the "real"
5444 entry in the hash table, thus we never get to see the real
5445 symbol in a hash traversal. So look at it now. */
5446 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5448 info = (struct bfd_link_info *) inf;
5449 htab = elf32_nios2_hash_table (info);
5451 if (h->plt.offset != (bfd_vma)-1)
5452 h->plt.offset += htab->res_n_size;
5453 if (htab->root.splt == h->root.u.def.section)
5454 h->root.u.def.value += htab->res_n_size;
5459 /* Another worker function for nios2_elf32_size_dynamic_sections.
5460 Allocate space in .plt, .got and associated reloc sections for
5463 allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5465 struct bfd_link_info *info;
5466 struct elf32_nios2_link_hash_table *htab;
5467 struct elf32_nios2_link_hash_entry *eh;
5468 struct elf_dyn_relocs *p;
5471 if (h->root.type == bfd_link_hash_indirect)
5474 if (h->root.type == bfd_link_hash_warning)
5475 /* When warning symbols are created, they **replace** the "real"
5476 entry in the hash table, thus we never get to see the real
5477 symbol in a hash traversal. So look at it now. */
5478 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5480 info = (struct bfd_link_info *) inf;
5481 htab = elf32_nios2_hash_table (info);
5483 if (htab->root.dynamic_sections_created
5484 && h->plt.refcount > 0)
5486 /* Make sure this symbol is output as a dynamic symbol.
5487 Undefined weak syms won't yet be marked as dynamic. */
5488 if (h->dynindx == -1
5490 && !bfd_elf_link_record_dynamic_symbol (info, h))
5493 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
5495 asection *s = htab->root.splt;
5497 /* Allocate room for the header. */
5500 if (bfd_link_pic (info))
5506 h->plt.offset = s->size;
5508 /* If this symbol is not defined in a regular file, and we are
5509 not generating a shared library, then set the symbol to this
5510 location in the .plt. This is required to make function
5511 pointers compare as equal between the normal executable and
5512 the shared library. */
5513 if (! bfd_link_pic (info)
5516 h->root.u.def.section = s;
5517 h->root.u.def.value = h->plt.offset;
5520 /* Make room for this entry. */
5523 /* We also need to make an entry in the .rela.plt section. */
5524 htab->root.srelplt->size += sizeof (Elf32_External_Rela);
5526 /* And the .got.plt section. */
5527 htab->root.sgotplt->size += 4;
5531 h->plt.offset = (bfd_vma) -1;
5537 h->plt.offset = (bfd_vma) -1;
5541 eh = (struct elf32_nios2_link_hash_entry *) h;
5542 use_plt = (eh->got_types_used == CALL_USED
5543 && h->plt.offset != (bfd_vma) -1);
5545 if (h->got.refcount > 0)
5549 int tls_type = eh->tls_type;
5552 /* Make sure this symbol is output as a dynamic symbol.
5553 Undefined weak syms won't yet be marked as dynamic. */
5554 if (h->dynindx == -1
5556 && !bfd_elf_link_record_dynamic_symbol (info, h))
5559 s = htab->root.sgot;
5560 h->got.offset = s->size;
5562 if (tls_type == GOT_UNKNOWN)
5565 if (tls_type == GOT_NORMAL)
5566 /* Non-TLS symbols need one GOT slot. */
5570 if (tls_type & GOT_TLS_GD)
5571 /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */
5573 if (tls_type & GOT_TLS_IE)
5574 /* R_NIOS2_TLS_IE16 needs one GOT slot. */
5578 dyn = htab->root.dynamic_sections_created;
5581 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
5582 && (!bfd_link_pic (info)
5583 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5586 if (tls_type != GOT_NORMAL
5587 && (bfd_link_pic (info) || indx != 0)
5588 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5589 || h->root.type != bfd_link_hash_undefweak))
5591 if (tls_type & GOT_TLS_IE)
5592 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5594 if (tls_type & GOT_TLS_GD)
5595 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5597 if ((tls_type & GOT_TLS_GD) && indx != 0)
5598 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5600 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5601 || h->root.type != bfd_link_hash_undefweak)
5603 && (bfd_link_pic (info)
5604 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5605 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5608 h->got.offset = (bfd_vma) -1;
5610 if (eh->dyn_relocs == NULL)
5613 /* In the shared -Bsymbolic case, discard space allocated for
5614 dynamic pc-relative relocs against symbols which turn out to be
5615 defined in regular objects. For the normal shared case, discard
5616 space for pc-relative relocs that have become local due to symbol
5617 visibility changes. */
5619 if (bfd_link_pic (info))
5622 && (h->forced_local || SYMBOLIC_BIND (info, h)))
5624 struct elf_dyn_relocs **pp;
5626 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5628 p->count -= p->pc_count;
5637 /* Also discard relocs on undefined weak syms with non-default
5639 if (eh->dyn_relocs != NULL
5640 && h->root.type == bfd_link_hash_undefweak)
5642 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5643 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
5644 eh->dyn_relocs = NULL;
5646 /* Make sure undefined weak symbols are output as a dynamic
5648 else if (h->dynindx == -1
5650 && !bfd_elf_link_record_dynamic_symbol (info, h))
5656 /* For the non-shared case, discard space for relocs against
5657 symbols which turn out to need copy relocs or are not
5661 && ((h->def_dynamic && !h->def_regular)
5662 || (htab->root.dynamic_sections_created
5663 && (h->root.type == bfd_link_hash_undefweak
5664 || h->root.type == bfd_link_hash_undefined))))
5666 /* Make sure this symbol is output as a dynamic symbol.
5667 Undefined weak syms won't yet be marked as dynamic. */
5668 if (h->dynindx == -1
5670 && !bfd_elf_link_record_dynamic_symbol (info, h))
5673 /* If that succeeded, we know we'll be keeping all the
5675 if (h->dynindx != -1)
5679 eh->dyn_relocs = NULL;
5684 /* Finally, allocate space. */
5685 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5687 asection *sreloc = elf_section_data (p->sec)->sreloc;
5688 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5694 /* Implement elf_backend_size_dynamic_sections:
5695 Set the sizes of the dynamic sections. */
5697 nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5698 struct bfd_link_info *info)
5704 struct elf32_nios2_link_hash_table *htab;
5706 htab = elf32_nios2_hash_table (info);
5707 dynobj = htab->root.dynobj;
5708 BFD_ASSERT (dynobj != NULL);
5710 htab->res_n_size = 0;
5711 if (htab->root.dynamic_sections_created)
5713 /* Set the contents of the .interp section to the interpreter. */
5714 if (bfd_link_executable (info) && !info->nointerp)
5716 s = bfd_get_linker_section (dynobj, ".interp");
5717 BFD_ASSERT (s != NULL);
5718 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5719 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5724 /* We may have created entries in the .rela.got section.
5725 However, if we are not creating the dynamic sections, we will
5726 not actually use these entries. Reset the size of .rela.got,
5727 which will cause it to get stripped from the output file
5729 s = htab->root.srelgot;
5734 /* Set up .got offsets for local syms, and space for local dynamic
5736 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5738 bfd_signed_vma *local_got;
5739 bfd_signed_vma *end_local_got;
5740 char *local_tls_type;
5741 bfd_size_type locsymcount;
5742 Elf_Internal_Shdr *symtab_hdr;
5745 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5748 for (s = ibfd->sections; s != NULL; s = s->next)
5750 struct elf_dyn_relocs *p;
5752 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
5754 if (!bfd_is_abs_section (p->sec)
5755 && bfd_is_abs_section (p->sec->output_section))
5757 /* Input section has been discarded, either because
5758 it is a copy of a linkonce section or due to
5759 linker script /DISCARD/, so we'll be discarding
5762 else if (p->count != 0)
5764 srel = elf_section_data (p->sec)->sreloc;
5765 srel->size += p->count * sizeof (Elf32_External_Rela);
5766 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5767 info->flags |= DF_TEXTREL;
5772 local_got = elf_local_got_refcounts (ibfd);
5776 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5777 locsymcount = symtab_hdr->sh_info;
5778 end_local_got = local_got + locsymcount;
5779 local_tls_type = elf32_nios2_local_got_tls_type (ibfd);
5780 s = htab->root.sgot;
5781 srel = htab->root.srelgot;
5782 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
5786 *local_got = s->size;
5787 if (*local_tls_type & GOT_TLS_GD)
5788 /* TLS_GD relocs need an 8-byte structure in the GOT. */
5790 if (*local_tls_type & GOT_TLS_IE)
5792 if (*local_tls_type == GOT_NORMAL)
5795 if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD)
5796 srel->size += sizeof (Elf32_External_Rela);
5799 *local_got = (bfd_vma) -1;
5803 if (htab->tls_ldm_got.refcount > 0)
5805 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5806 for R_NIOS2_TLS_LDM16 relocations. */
5807 htab->tls_ldm_got.offset = htab->root.sgot->size;
5808 htab->root.sgot->size += 8;
5809 if (bfd_link_pic (info))
5810 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5813 htab->tls_ldm_got.offset = -1;
5815 /* Allocate global sym .plt and .got entries, and space for global
5816 sym dynamic relocs. */
5817 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
5819 if (htab->root.dynamic_sections_created)
5821 /* If the .got section is more than 0x8000 bytes, we add
5822 0x8000 to the value of _gp_got, so that 16-bit relocations
5823 have a greater chance of working. */
5824 if (htab->root.sgot->size >= 0x8000
5825 && htab->h_gp_got->root.u.def.value == 0)
5826 htab->h_gp_got->root.u.def.value = 0x8000;
5829 /* The check_relocs and adjust_dynamic_symbol entry points have
5830 determined the sizes of the various dynamic sections. Allocate
5833 for (s = dynobj->sections; s != NULL; s = s->next)
5837 if ((s->flags & SEC_LINKER_CREATED) == 0)
5840 /* It's OK to base decisions on the section name, because none
5841 of the dynobj section names depend upon the input files. */
5842 name = bfd_get_section_name (dynobj, s);
5844 if (CONST_STRNEQ (name, ".rela"))
5848 if (s != htab->root.srelplt)
5851 /* We use the reloc_count field as a counter if we need
5852 to copy relocs into the output file. */
5856 else if (s == htab->root.splt)
5858 /* Correct for the number of res_N branches. */
5859 if (s->size != 0 && !bfd_link_pic (info))
5861 htab->res_n_size = (s->size - 28) / 3;
5862 s->size += htab->res_n_size;
5865 else if (s != htab->sbss
5866 && s != htab->root.sgot
5867 && s != htab->root.sgotplt
5868 && s != htab->root.sdynbss
5869 && s != htab->root.sdynrelro)
5870 /* It's not one of our sections, so don't allocate space. */
5875 s->flags |= SEC_EXCLUDE;
5879 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5882 /* Allocate memory for the section contents. */
5883 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5884 if (s->contents == NULL)
5888 /* Adjust dynamic symbols that point to the plt to account for the
5889 now-known number of resN slots. */
5890 if (htab->res_n_size)
5891 elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info);
5893 if (htab->root.dynamic_sections_created)
5895 /* Add some entries to the .dynamic section. We fill in the
5896 values later, in elf_nios2_finish_dynamic_sections, but we
5897 must add the entries now so that we get the correct size for
5898 the .dynamic section. The DT_DEBUG entry is filled in by the
5899 dynamic linker and used by the debugger. */
5900 #define add_dynamic_entry(TAG, VAL) \
5901 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5903 if (!bfd_link_pic (info) && !add_dynamic_entry (DT_DEBUG, 0))
5906 if (htab->root.sgotplt->size != 0
5907 && !add_dynamic_entry (DT_PLTGOT, 0))
5910 if (htab->root.splt->size != 0
5911 && (!add_dynamic_entry (DT_PLTRELSZ, 0)
5912 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5913 || !add_dynamic_entry (DT_JMPREL, 0)))
5917 && (!add_dynamic_entry (DT_RELA, 0)
5918 || !add_dynamic_entry (DT_RELASZ, 0)
5919 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))))
5922 if (!bfd_link_pic (info) && !add_dynamic_entry (DT_NIOS2_GP, 0))
5925 if ((info->flags & DF_TEXTREL) != 0
5926 && !add_dynamic_entry (DT_TEXTREL, 0))
5929 #undef add_dynamic_entry
5934 /* Free the derived linker hash table. */
5936 nios2_elf32_link_hash_table_free (bfd *obfd)
5938 struct elf32_nios2_link_hash_table *htab
5939 = (struct elf32_nios2_link_hash_table *) obfd->link.hash;
5941 bfd_hash_table_free (&htab->bstab);
5942 _bfd_elf_link_hash_table_free (obfd);
5945 /* Implement bfd_elf32_bfd_link_hash_table_create. */
5946 static struct bfd_link_hash_table *
5947 nios2_elf32_link_hash_table_create (bfd *abfd)
5949 struct elf32_nios2_link_hash_table *ret;
5950 bfd_size_type amt = sizeof (struct elf32_nios2_link_hash_table);
5952 ret = bfd_zmalloc (amt);
5956 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5959 elf32_nios2_link_hash_entry),
5966 /* Init the stub hash table too. */
5967 if (!bfd_hash_table_init (&ret->bstab, stub_hash_newfunc,
5968 sizeof (struct elf32_nios2_stub_hash_entry)))
5970 _bfd_elf_link_hash_table_free (abfd);
5973 ret->root.root.hash_table_free = nios2_elf32_link_hash_table_free;
5975 return &ret->root.root;
5978 /* Implement elf_backend_reloc_type_class. */
5979 static enum elf_reloc_type_class
5980 nios2_elf32_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
5981 const asection *rel_sec ATTRIBUTE_UNUSED,
5982 const Elf_Internal_Rela *rela)
5984 switch ((int) ELF32_R_TYPE (rela->r_info))
5986 case R_NIOS2_RELATIVE:
5987 return reloc_class_relative;
5988 case R_NIOS2_JUMP_SLOT:
5989 return reloc_class_plt;
5991 return reloc_class_copy;
5993 return reloc_class_normal;
5997 /* Return 1 if target is one of ours. */
5999 is_nios2_elf_target (const struct bfd_target *targ)
6001 return (targ == &nios2_elf32_le_vec
6002 || targ == &nios2_elf32_be_vec);
6005 /* Implement elf_backend_add_symbol_hook.
6006 This hook is called by the linker when adding symbols from an object
6007 file. We use it to put .comm items in .sbss, and not .bss. */
6009 nios2_elf_add_symbol_hook (bfd *abfd,
6010 struct bfd_link_info *info,
6011 Elf_Internal_Sym *sym,
6012 const char **namep ATTRIBUTE_UNUSED,
6013 flagword *flagsp ATTRIBUTE_UNUSED,
6017 if (sym->st_shndx == SHN_COMMON
6018 && !bfd_link_relocatable (info)
6019 && sym->st_size <= elf_gp_size (abfd)
6020 && is_nios2_elf_target (info->output_bfd->xvec))
6022 /* Common symbols less than or equal to -G nn bytes are automatically
6024 struct elf32_nios2_link_hash_table *htab;
6026 htab = elf32_nios2_hash_table (info);
6027 if (htab->sbss == NULL)
6029 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
6031 if (htab->root.dynobj == NULL)
6032 htab->root.dynobj = abfd;
6034 htab->sbss = bfd_make_section_anyway_with_flags (htab->root.dynobj,
6036 if (htab->sbss == NULL)
6041 *valp = sym->st_size;
6047 /* Implement elf_backend_can_make_relative_eh_frame:
6048 Decide whether to attempt to turn absptr or lsda encodings in
6049 shared libraries into pcrel within the given input section. */
6051 nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED,
6052 struct bfd_link_info *info
6054 asection *eh_frame_section
6057 /* We can't use PC-relative encodings in the .eh_frame section. */
6061 /* Implement elf_backend_special_sections. */
6062 const struct bfd_elf_special_section elf32_nios2_special_sections[] =
6064 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS,
6065 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
6066 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS,
6067 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
6068 { NULL, 0, 0, 0, 0 }
6071 #define ELF_ARCH bfd_arch_nios2
6072 #define ELF_TARGET_ID NIOS2_ELF_DATA
6073 #define ELF_MACHINE_CODE EM_ALTERA_NIOS2
6075 /* The Nios II MMU uses a 4K page size. */
6077 #define ELF_MAXPAGESIZE 0x1000
6079 #define bfd_elf32_bfd_link_hash_table_create \
6080 nios2_elf32_link_hash_table_create
6082 #define bfd_elf32_bfd_merge_private_bfd_data \
6083 nios2_elf32_merge_private_bfd_data
6085 /* Relocation table lookup macros. */
6087 #define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup
6088 #define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup
6090 /* JUMP_TABLE_LINK macros. */
6092 /* elf_info_to_howto (using RELA relocations). */
6094 #define elf_info_to_howto nios2_elf32_info_to_howto
6096 /* elf backend functions. */
6098 #define elf_backend_can_gc_sections 1
6099 #define elf_backend_can_refcount 1
6100 #define elf_backend_plt_readonly 1
6101 #define elf_backend_want_got_plt 1
6102 #define elf_backend_want_dynrelro 1
6103 #define elf_backend_rela_normal 1
6104 #define elf_backend_dtrel_excludes_plt 1
6106 #define elf_backend_relocate_section nios2_elf32_relocate_section
6107 #define elf_backend_section_flags nios2_elf32_section_flags
6108 #define elf_backend_fake_sections nios2_elf32_fake_sections
6109 #define elf_backend_check_relocs nios2_elf32_check_relocs
6111 #define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook
6112 #define elf_backend_create_dynamic_sections \
6113 nios2_elf32_create_dynamic_sections
6114 #define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol
6115 #define elf_backend_finish_dynamic_sections \
6116 nios2_elf32_finish_dynamic_sections
6117 #define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol
6118 #define elf_backend_reloc_type_class nios2_elf32_reloc_type_class
6119 #define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections
6120 #define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook
6121 #define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol
6122 #define elf_backend_object_p nios2_elf32_object_p
6124 #define elf_backend_grok_prstatus nios2_grok_prstatus
6125 #define elf_backend_grok_psinfo nios2_grok_psinfo
6127 #undef elf_backend_can_make_relative_eh_frame
6128 #define elf_backend_can_make_relative_eh_frame \
6129 nios2_elf32_can_make_relative_eh_frame
6131 #define elf_backend_special_sections elf32_nios2_special_sections
6133 #define TARGET_LITTLE_SYM nios2_elf32_le_vec
6134 #define TARGET_LITTLE_NAME "elf32-littlenios2"
6135 #define TARGET_BIG_SYM nios2_elf32_be_vec
6136 #define TARGET_BIG_NAME "elf32-bignios2"
6138 #define elf_backend_got_header_size 12
6139 #define elf_backend_default_execstack 0
6141 #include "elf32-target.h"