| blob | 7126ed46c38f3ca4f4695c5837f6abbd81e70b85 |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
28 /* Forward declarations. */
29 static bfd_reloc_status_type elf32_frv_relocate_lo16
31 static bfd_reloc_status_type elf32_frv_relocate_hi16
33 static bfd_reloc_status_type elf32_frv_relocate_label24
35 static bfd_reloc_status_type elf32_frv_relocate_gprel12
38 static bfd_reloc_status_type elf32_frv_relocate_gprelu12
41 static bfd_reloc_status_type elf32_frv_relocate_gprello
44 static bfd_reloc_status_type elf32_frv_relocate_gprelhi
49 static void frv_info_to_howto_rela
51 static bfd_boolean elf32_frv_relocate_section
54 static bfd_boolean elf32_frv_add_symbol_hook
57 static bfd_reloc_status_type frv_final_link_relocate
60 static bfd_boolean elf32_frv_gc_sweep_hook
62 Elf_Internal_Rela *));
66 static bfd_boolean elf32_frv_check_relocs
69 static int elf32_frv_machine
71 static bfd_boolean elf32_frv_object_p
73 static bfd_boolean frv_elf_set_private_flags
75 static bfd_boolean frv_elf_copy_private_bfd_data
77 static bfd_boolean frv_elf_merge_private_bfd_data
79 static bfd_boolean frv_elf_print_private_bfd_data
87 {
88 /* This reloc does nothing. */
103 /* A 32 bit absolute relocation. */
118 /* A 16 bit pc-relative relocation. */
133 /* A 24-bit pc-relative relocation. */
246 /* A 12-bit signed operand with the GOT offset for the address of
247 the symbol. */
262 /* The upper 16 bits of the GOT offset for the address of the
263 symbol. */
278 /* The lower 16 bits of the GOT offset for the address of the
279 symbol. */
294 /* The 32-bit address of the canonical descriptor of a function. */
309 /* A 12-bit signed operand with the GOT offset for the address of
310 canonical descriptor of a function. */
325 /* The upper 16 bits of the GOT offset for the address of the
326 canonical descriptor of a function. */
341 /* The lower 16 bits of the GOT offset for the address of the
342 canonical descriptor of a function. */
357 /* The 64-bit descriptor of a function. */
372 /* A 12-bit signed operand with the GOT offset for the address of
373 canonical descriptor of a function. */
388 /* The upper 16 bits of the GOT offset for the address of the
389 canonical descriptor of a function. */
404 /* The lower 16 bits of the GOT offset for the address of the
405 canonical descriptor of a function. */
420 /* A 12-bit signed operand with the GOT offset for the address of
421 the symbol. */
436 /* The upper 16 bits of the GOT offset for the address of the
437 symbol. */
452 /* The lower 16 bits of the GOT offset for the address of the
453 symbol. */
468 /* A 24-bit pc-relative relocation referencing the TLS PLT entry for
469 a thread-local symbol. If the symbol number is 0, it refers to
470 the module. */
485 /* A 64-bit TLS descriptor for a symbol. This relocation is only
486 valid as a REL, dynamic relocation. */
501 /* A 12-bit signed operand with the GOT offset for the TLS
502 descriptor of the symbol. */
517 /* The upper 16 bits of the GOT offset for the TLS descriptor of the
518 symbol. */
533 /* The lower 16 bits of the GOT offset for the TLS descriptor of the
534 symbol. */
549 /* A 12-bit signed operand with the offset from the module base
550 address to the thread-local symbol address. */
565 /* The upper 16 bits of the offset from the module base address to
566 the thread-local symbol address. */
581 /* The lower 16 bits of the offset from the module base address to
582 the thread-local symbol address. */
597 /* A 12-bit signed operand with the GOT offset for the TLSOFF entry
598 for a symbol. */
613 /* The upper 16 bits of the GOT offset for the TLSOFF entry for a
614 symbol. */
629 /* The lower 16 bits of the GOT offset for the TLSOFF entry for a
630 symbol. */
645 /* The 32-bit offset from the thread pointer (not the module base
646 address) to a thread-local symbol. */
661 /* An annotation for linker relaxation, that denotes the
662 symbol+addend whose TLS descriptor is referenced by the sum of
663 the two input registers of an ldd instruction. */
678 /* An annotation for linker relaxation, that denotes the
679 symbol+addend whose TLS resolver entry point is given by the sum
680 of the two register operands of an calll instruction. */
695 /* An annotation for linker relaxation, that denotes the
696 symbol+addend whose TLS offset GOT entry is given by the sum of
697 the two input registers of an ld instruction. */
712 /* A 32-bit offset from the module base address to
713 the thread-local symbol address. */
727 };
729 /* GNU extension to record C++ vtable hierarchy. */
745 /* GNU extension to record C++ vtable member usage. */
761 /* The following 3 relocations are REL. The only difference to the
762 entries in the table above are that partial_inplace is TRUE. */
809 /* A 64-bit TLS descriptor for a symbol. The first word resolves to
810 an entry point, and the second resolves to a special argument.
811 If the symbol turns out to be in static TLS, the entry point is a
812 return instruction, and the special argument is the TLS offset
813 for the symbol. If it's in dynamic TLS, the entry point is a TLS
814 offset resolver, and the special argument is a pointer to a data
815 structure allocated by the dynamic loader, containing the GOT
816 address for the offset resolver, the module id, the offset within
817 the module, and anything else the TLS offset resolver might need
818 to determine the TLS offset for the symbol in the running
819 thread. */
835 /* The 32-bit offset from the thread pointer (not the module base
836 address) to a thread-local symbol. */
852 \f
854 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_frvfdpic_vec)
856 /* An extension of the elf hash table data structure, containing some
857 additional FRV-specific data. */
858 struct frvfdpic_elf_link_hash_table
859 {
862 /* A pointer to the .got section. */
864 /* A pointer to the .rel.got section. */
866 /* A pointer to the .rofixup section. */
868 /* A pointer to the .plt section. */
870 /* A pointer to the .rel.plt section. */
872 /* GOT base offset. */
873 bfd_vma got0;
874 /* Location of the first non-lazy PLT entry, i.e., the number of
875 bytes taken by lazy PLT entries. If locally-bound TLS
876 descriptors require a ret instruction, it will be placed at this
877 offset. */
878 bfd_vma plt0;
879 /* A hash table holding information about which symbols were
880 referenced with which PIC-related relocations. */
882 /* Summary reloc information collected by
883 _frvfdpic_count_got_plt_entries. */
885 };
887 /* Get the FRV ELF linker hash table from a link_info structure. */
889 #define frvfdpic_hash_table(info) \
890 ((struct frvfdpic_elf_link_hash_table *) ((info)->hash))
892 #define frvfdpic_got_section(info) \
893 (frvfdpic_hash_table (info)->sgot)
894 #define frvfdpic_gotrel_section(info) \
895 (frvfdpic_hash_table (info)->sgotrel)
896 #define frvfdpic_gotfixup_section(info) \
897 (frvfdpic_hash_table (info)->sgotfixup)
898 #define frvfdpic_plt_section(info) \
899 (frvfdpic_hash_table (info)->splt)
900 #define frvfdpic_pltrel_section(info) \
901 (frvfdpic_hash_table (info)->spltrel)
902 #define frvfdpic_relocs_info(info) \
903 (frvfdpic_hash_table (info)->relocs_info)
904 #define frvfdpic_got_initial_offset(info) \
905 (frvfdpic_hash_table (info)->got0)
906 #define frvfdpic_plt_initial_offset(info) \
907 (frvfdpic_hash_table (info)->plt0)
908 #define frvfdpic_dynamic_got_plt_info(info) \
909 (frvfdpic_hash_table (info)->g)
911 /* Currently it's the same, but if some day we have a reason to change
912 it, we'd better be using a different macro.
914 FIXME: if there's any TLS PLT entry that uses local-exec or
915 initial-exec models, we could use the ret at the end of any of them
916 instead of adding one more. */
917 #define frvfdpic_plt_tls_ret_offset(info) \
918 (frvfdpic_plt_initial_offset (info))
920 /* The name of the dynamic interpreter. This is put in the .interp
921 section. */
925 #define DEFAULT_STACK_SIZE 0x20000
927 /* This structure is used to collect the number of entries present in
928 each addressable range of the got. */
929 struct _frvfdpic_dynamic_got_info
930 {
931 /* Several bits of information about the current link. */
933 /* Total GOT size needed for GOT entries within the 12-, 16- or 32-bit
934 ranges. */
936 /* Total GOT size needed for function descriptor entries within the 12-,
937 16- or 32-bit ranges. */
939 /* Total GOT size needed by function descriptor entries referenced
940 in PLT entries, that would be profitable to place in offsets
941 close to the PIC register. */
942 bfd_vma fdplt;
943 /* Total PLT size needed by lazy PLT entries. */
944 bfd_vma lzplt;
945 /* Total GOT size needed for TLS descriptor entries within the 12-,
946 16- or 32-bit ranges. */
948 /* Total GOT size needed by TLS descriptors referenced in PLT
949 entries, that would be profitable to place in offers close to the
950 PIC register. */
951 bfd_vma tlsdplt;
952 /* Total PLT size needed by TLS lazy PLT entries. */
953 bfd_vma tlslzplt;
954 /* Number of relocations carried over from input object files. */
956 /* Number of fixups introduced by relocations in input object files. */
958 /* The number of fixups that reference the ret instruction added to
959 the PLT for locally-resolved TLS descriptors. */
961 };
963 /* This structure is used to assign offsets to got entries, function
964 descriptors, plt entries and lazy plt entries. */
966 struct _frvfdpic_dynamic_got_plt_info
967 {
968 /* Summary information collected with _frvfdpic_count_got_plt_entries. */
971 /* For each addressable range, we record a MAX (positive) and MIN
972 (negative) value. CUR is used to assign got entries, and it's
973 incremented from an initial positive value to MAX, then from MIN
974 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
975 assign function descriptors, and it's decreased from an initial
976 non-positive value to MIN, then from MAX down to CUR (unless CUR
977 wraps around first). All of MIN, MAX, CUR and FDCUR always point
978 to even words. ODD, if non-zero, indicates an odd word to be
979 used for the next got entry, otherwise CUR is used and
980 incremented by a pair of words, wrapping around when it reaches
981 MAX. FDCUR is decremented (and wrapped) before the next function
982 descriptor is chosen. FDPLT indicates the number of remaining
983 slots that can be used for function descriptors used only by PLT
984 entries.
986 TMAX, TMIN and TCUR are used to assign TLS descriptors. TCUR
987 starts as MAX, and grows up to TMAX, then wraps around to TMIN
988 and grows up to MIN. TLSDPLT indicates the number of remaining
989 slots that can be used for TLS descriptors used only by TLS PLT
990 entries. */
991 struct _frvfdpic_dynamic_got_alloc_data
992 {
997 };
999 /* Create an FRV ELF linker hash table. */
1003 {
1012 _bfd_elf_link_hash_newfunc))
1013 {
1016 }
1019 }
1021 /* Decide whether a reference to a symbol can be resolved locally or
1022 not. If the symbol is protected, we want the local address, but
1023 its function descriptor must be assigned by the dynamic linker. */
1024 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
1025 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1026 || ! elf_hash_table (INFO)->dynamic_sections_created)
1027 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
1028 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1030 /* This structure collects information on what kind of GOT, PLT or
1031 function descriptors are required by relocations that reference a
1032 certain symbol. */
1033 struct frvfdpic_relocs_info
1034 {
1035 /* The index of the symbol, as stored in the relocation r_info, if
1036 we have a local symbol; -1 otherwise. */
1038 union
1039 {
1040 /* The input bfd in which the symbol is defined, if it's a local
1041 symbol. */
1043 /* If symndx == -1, the hash table entry corresponding to a global
1044 symbol (even if it turns out to bind locally, in which case it
1045 should ideally be replaced with section's symndx + addend). */
1048 /* The addend of the relocation that references the symbol. */
1049 bfd_vma addend;
1051 /* The fields above are used to identify an entry. The fields below
1052 contain information on how an entry is used and, later on, which
1053 locations it was assigned. */
1054 /* The following 3 fields record whether the symbol+addend above was
1055 ever referenced with a GOT relocation. The 12 suffix indicates a
1056 GOT12 relocation; los is used for GOTLO relocations that are not
1057 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1058 pairs. */
1062 /* Whether a FUNCDESC relocation references symbol+addend. */
1064 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1068 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1072 /* Whether a GETTLSOFF relocation references symbol+addend. */
1074 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1075 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1076 We might instead just pre-compute flags telling whether the
1077 object is suitable for local exec, initial exec or general
1078 dynamic addressing, and use that all over the place. We could
1079 also try to do a better job of merging TLSOFF and TLSDESC entries
1080 in main executables, but perhaps we can get rid of TLSDESC
1081 entirely in them instead. */
1082 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1086 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1090 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1091 GOTOFFHI relocations. The addend doesn't really matter, since we
1092 envision that this will only be used to check whether the symbol
1093 is mapped to the same segment as the got. */
1095 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1097 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1098 relocation. */
1100 /* Whether we need a PLT entry for a symbol. Should be implied by
1101 something like:
1102 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1104 /* Whether a function descriptor should be created in this link unit
1105 for symbol+addend. Should be implied by something like:
1106 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1107 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1108 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1110 /* Whether a lazy PLT entry is needed for this symbol+addend.
1111 Should be implied by something like:
1112 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1113 && ! (info->flags & DF_BIND_NOW)) */
1115 /* Whether we've already emitted GOT relocations and PLT entries as
1116 needed for this symbol. */
1119 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1120 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1121 symbol+addend. */
1124 /* The number of .rofixups entries and dynamic relocations allocated
1125 for this symbol, minus any that might have already been used. */
1128 /* The offsets of the GOT entries assigned to symbol+addend, to the
1129 function descriptor's address, and to a function descriptor,
1130 respectively. Should be zero if unassigned. The offsets are
1131 counted from the value that will be assigned to the PIC register,
1132 not from the beginning of the .got section. */
1134 /* The offsets of the PLT entries assigned to symbol+addend,
1135 non-lazy and lazy, respectively. If unassigned, should be
1136 (bfd_vma)-1. */
1138 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1140 /* The offset of the TLS offset PLT entry. */
1141 bfd_vma tlsplt_entry;
1142 };
1144 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1145 static hashval_t
1147 {
1153 }
1155 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1156 identical. */
1157 static int
1159 {
1165 }
1167 /* Find or create an entry in a hash table HT that matches the key
1168 fields of the given ENTRY. If it's not found, memory for a new
1169 entry is allocated in ABFD's obstack. */
1175 {
1198 }
1200 /* Obtain the address of the entry in HT associated with H's symbol +
1201 addend, creating a new entry if none existed. ABFD is only used
1202 for memory allocation purposes. */
1207 bfd_vma addend,
1209 {
1217 }
1219 /* Obtain the address of the entry in HT associated with the SYMNDXth
1220 local symbol of the input bfd ABFD, plus the addend, creating a new
1221 entry if none existed. */
1226 bfd_vma addend,
1228 {
1236 }
1238 /* Merge fields set by check_relocs() of two entries that end up being
1239 mapped to the same (presumably global) symbol. */
1244 {
1265 }
1267 /* Every block of 65535 lazy PLT entries shares a single call to the
1268 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1269 32767, counting from 0). All other lazy PLT entries branch to it
1270 in a single instruction. */
1272 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1273 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1275 /* Add a dynamic relocation to the SRELOC section. */
1281 {
1282 Elf_Internal_Rela outrel;
1283 bfd_vma reloc_offset;
1295 /* If the entry's index is zero, this relocation was probably to a
1296 linkonce section that got discarded. We reserved a dynamic
1297 relocation, but it was for another entry than the one we got at
1298 the time of emitting the relocation. Unfortunately there's no
1299 simple way for us to catch this situation, since the relocation
1300 is cleared right before calling relocate_section, at which point
1301 we no longer know what the relocation used to point to. */
1303 {
1306 }
1309 }
1311 /* Add a fixup to the ROFIXUP section. */
1313 static bfd_vma
1316 {
1317 bfd_vma fixup_offset;
1324 {
1327 }
1331 {
1332 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1333 above. */
1336 }
1339 }
1341 /* Find the segment number in which OSEC, and output section, is
1342 located. */
1344 static unsigned
1346 {
1350 /* Find the segment that contains the output_section. */
1355 {
1364 }
1367 }
1371 {
1375 }
1377 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1379 /* Return the base VMA address which should be subtracted from real addresses
1380 when resolving TLSMOFF relocation.
1381 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1383 static bfd_vma
1385 {
1386 /* If tls_sec is NULL, we should have signalled an error already. */
1390 }
1392 /* Generate relocations for GOT entries, function descriptors, and
1393 code for PLT and lazy PLT entries. */
1401 bfd_vma addend)
1403 {
1413 {
1414 /* If the symbol is dynamic, consider it for dynamic
1415 relocations, otherwise decay to section + offset. */
1418 else
1419 {
1424 else
1426 }
1427 }
1429 /* Generate relocation for GOT entry pointing to the symbol. */
1431 {
1435 /* If the symbol is dynamic but binds locally, use
1436 section+offset. */
1439 {
1442 else
1447 else
1449 }
1451 /* If we're linking an executable at a fixed address, we can
1452 omit the dynamic relocation as long as the symbol is local to
1453 this module. */
1457 {
1465 ->vma
1469 }
1470 else
1472 _bfd_elf_section_offset
1486 }
1488 /* Generate relocation for GOT entry pointing to a canonical
1489 function descriptor. */
1491 {
1498 {
1499 /* If the symbol is dynamic and there may be dynamic symbol
1500 resolution because we are, or are linked with, a shared
1501 library, emit a FUNCDESC relocation such that the dynamic
1502 linker will allocate the function descriptor. If the
1503 symbol needs a non-local function descriptor but binds
1504 locally (e.g., its visibility is protected, emit a
1505 dynamic relocation decayed to section+offset. */
1510 {
1516 }
1519 {
1524 {
1531 }
1532 }
1533 else
1534 {
1535 /* Otherwise, we know we have a private function descriptor,
1536 so reference it directly. */
1544 }
1546 /* If there is room for dynamic symbol resolution, emit the
1547 dynamic relocation. However, if we're linking an
1548 executable at a fixed location, we won't have emitted a
1549 dynamic symbol entry for the got section, so idx will be
1550 zero, which means we can and should compute the address
1551 of the private descriptor ourselves. */
1555 {
1562 ->output_offset
1565 }
1566 else
1569 _bfd_elf_section_offset
1579 }
1585 }
1587 /* Generate relocation to fill in a private function descriptor in
1588 the GOT. */
1590 {
1593 bfd_vma ofst;
1596 /* If the symbol is dynamic but binds locally, use
1597 section+offset. */
1600 {
1603 else
1608 else
1610 }
1612 /* If we're linking an executable at a fixed address, we can
1613 omit the dynamic relocation as long as the symbol is local to
1614 this module. */
1617 {
1623 {
1629 ->output_offset
1637 ->output_offset
1640 }
1641 }
1642 else
1643 {
1644 ofst =
1646 entry->lazyplt
1649 _bfd_elf_section_offset
1659 }
1661 /* If we've omitted the dynamic relocation, just emit the fixed
1662 addresses of the symbol and of the local GOT base offset. */
1664 {
1669 }
1671 {
1673 {
1680 }
1684 /* A function descriptor used for lazy or local resolving is
1685 initialized such that its high word contains the output
1686 section index in which the PLT entries are located, and
1687 the low word contains the address of the lazy PLT entry
1688 entry point, that must be within the memory region
1689 assigned to that section. */
1693 highword = _frvfdpic_osec_to_segment
1695 }
1696 else
1697 {
1698 /* A function descriptor for a local function gets the index
1699 of the section. For a non-local function, it's
1700 disregarded. */
1705 else
1706 highword = _frvfdpic_osec_to_segment
1708 }
1718 }
1720 /* Generate code for the PLT entry. */
1722 {
1728 /* Figure out what kind of PLT entry we need, depending on the
1729 location of the function descriptor within the GOT. */
1732 {
1733 /* lddi @(gr15, fd_entry), gr14 */
1736 plt_code);
1738 }
1739 else
1740 {
1743 {
1744 /* setlos lo(fd_entry), gr14 */
1746 0x9cfc0000
1748 plt_code);
1750 }
1751 else
1752 {
1753 /* sethi.p hi(fd_entry), gr14
1754 setlo lo(fd_entry), gr14 */
1756 0x1cf80000
1759 plt_code);
1762 0x9cf40000
1764 plt_code);
1766 }
1767 /* ldd @(gr14,gr15),gr14 */
1770 }
1771 /* jmpl @(gr14,gr0) */
1773 }
1775 /* Generate code for the lazy PLT entry. */
1777 {
1780 bfd_vma resolverStub_addr;
1791 {
1792 /* This is a lazy PLT entry that includes a resolver call. */
1793 /* ldd @(gr15,gr0), gr4
1794 jmpl @(gr4,gr0) */
1797 }
1798 else
1799 {
1800 /* bra resolverStub */
1802 0xc01a0000
1805 lzplt_code);
1806 }
1807 }
1809 /* Generate relocation for GOT entry holding the TLS offset. */
1811 {
1817 {
1818 /* If the symbol is dynamic but binds locally, use
1819 section+offset. */
1821 {
1824 else
1830 else
1832 }
1833 }
1835 /* *ABS*+addend is special for TLS relocations, use only the
1836 addend. */
1841 ;
1842 /* If we're linking an executable, we can entirely omit the
1843 dynamic relocation if the symbol is local to this module. */
1847 {
1850 }
1851 else
1852 {
1856 {
1858 {
1863 }
1866 }
1868 _bfd_elf_section_offset
1878 }
1884 }
1887 {
1891 /* If the symbol is dynamic but binds locally, use
1892 section+offset. */
1895 {
1898 else
1903 else
1905 }
1907 /* If we didn't set up a TLS offset entry, but we're linking an
1908 executable and the symbol binds locally, we can use the
1909 module offset in the TLS descriptor in relaxations. */
1919 {
1920 /* *ABS*+addend is special for TLS relocations, use only the
1921 addend for the TLS offset, and take the module id as
1922 0. */
1926 ;
1927 /* For other TLS symbols that bind locally, add the section
1928 TLS offset to the addend. */
1945 ->output_offset
1951 /* We've used one of the reserved fixups, so discount it so
1952 that we can check at the end that we've used them
1953 all. */
1956 /* While at that, make sure the ret instruction makes to the
1957 right location in the PLT. We could do it only when we
1958 got to 0, but since the check at the end will only print
1959 a warning, make sure we have the ret in place in case the
1960 warning is missed. */
1964 }
1965 else
1966 {
1970 {
1972 {
1977 }
1980 }
1983 _bfd_elf_section_offset
1998 }
2004 }
2006 /* Generate code for the get-TLS-offset PLT entry. */
2008 {
2015 {
2019 /* sec may be NULL when referencing an undefweak symbol
2020 while linking a static executable. */
2022 {
2025 }
2026 else
2027 {
2030 else
2036 else
2038 }
2040 /* *ABS*+addend is special for TLS relocations, use only the
2041 addend for the TLS offset, and take the module id as
2042 0. */
2046 ;
2047 /* For other TLS symbols that bind locally, add the section
2048 TLS offset to the addend. */
2054 {
2055 /* setlos lo(ad), gr9 */
2057 0x92fc0000
2058 | (ad
2060 plt_code);
2062 }
2063 else
2064 {
2065 /* sethi.p hi(ad), gr9
2066 setlo lo(ad), gr9 */
2068 0x12f80000
2071 plt_code);
2074 0x92f40000
2075 | (ad
2077 plt_code);
2079 }
2080 /* ret */
2082 }
2084 {
2085 /* Figure out what kind of PLT entry we need, depending on the
2086 location of the TLS descriptor within the GOT. */
2089 {
2090 /* ldi @(gr15, tlsoff_entry), gr9 */
2094 plt_code);
2096 }
2097 else
2098 {
2101 {
2102 /* setlos lo(tlsoff_entry), gr8 */
2104 0x90fc0000
2107 plt_code);
2109 }
2110 else
2111 {
2112 /* sethi.p hi(tlsoff_entry), gr8
2113 setlo lo(tlsoff_entry), gr8 */
2115 0x10f80000
2118 plt_code);
2121 0x90f40000
2124 plt_code);
2126 }
2127 /* ld @(gr15,gr8),gr9 */
2130 }
2131 /* ret */
2133 }
2134 else
2135 {
2138 /* Figure out what kind of PLT entry we need, depending on the
2139 location of the TLS descriptor within the GOT. */
2142 {
2143 /* lddi @(gr15, tlsdesc_entry), gr8 */
2147 plt_code);
2149 }
2150 else
2151 {
2154 {
2155 /* setlos lo(tlsdesc_entry), gr8 */
2157 0x90fc0000
2160 plt_code);
2162 }
2163 else
2164 {
2165 /* sethi.p hi(tlsdesc_entry), gr8
2166 setlo lo(tlsdesc_entry), gr8 */
2168 0x10f80000
2171 plt_code);
2174 0x90f40000
2177 plt_code);
2179 }
2180 /* ldd @(gr15,gr8),gr8 */
2183 }
2184 /* jmpl @(gr8,gr0) */
2186 }
2187 }
2190 }
2192 /* Handle an FRV small data reloc. */
2194 static bfd_reloc_status_type
2202 bfd_vma value;
2203 {
2204 bfd_vma insn;
2205 bfd_vma gp;
2229 }
2231 /* Handle an FRV small data reloc. for the u12 field. */
2233 static bfd_reloc_status_type
2241 bfd_vma value;
2242 {
2243 bfd_vma insn;
2244 bfd_vma gp;
2246 bfd_vma mask;
2264 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2271 }
2273 /* Handle an FRV ELF HI16 reloc. */
2275 static bfd_reloc_status_type
2280 bfd_vma value;
2281 {
2282 bfd_vma insn;
2297 }
2298 static bfd_reloc_status_type
2303 bfd_vma value;
2304 {
2305 bfd_vma insn;
2319 }
2321 /* Perform the relocation for the CALL label24 instruction. */
2323 static bfd_reloc_status_type
2329 bfd_vma value;
2330 {
2331 bfd_vma insn;
2332 bfd_vma label6;
2333 bfd_vma label18;
2335 /* The format for the call instruction is:
2337 0 000000 0001111 000000000000000000
2338 label6 opcode label18
2340 The branch calculation is: pc + (4*label24)
2341 where label24 is the concatenation of label6 and label18. */
2343 /* Grab the instruction. */
2364 }
2366 static bfd_reloc_status_type
2374 bfd_vma value;
2375 {
2376 bfd_vma insn;
2377 bfd_vma gp;
2399 }
2401 static bfd_reloc_status_type
2409 bfd_vma value;
2410 {
2411 bfd_vma insn;
2412 bfd_vma gp;
2435 }
2440 bfd_reloc_code_real_type code;
2441 {
2443 {
2454 /* Fall through. */
2592 }
2595 }
2597 /* Set the howto pointer for an FRV ELF reloc. */
2599 static void
2604 {
2609 {
2621 }
2622 }
2624 /* Set the howto pointer for an FRV ELF REL reloc. */
2625 static void
2628 {
2633 {
2657 }
2658 }
2659 \f
2660 /* Perform a single relocation. By default we use the standard BFD
2661 routines, but a few relocs, we have to do them ourselves. */
2663 static bfd_reloc_status_type
2665 relocation)
2671 bfd_vma relocation;
2672 {
2676 }
2678 \f
2679 /* Relocate an FRV ELF section.
2681 The RELOCATE_SECTION function is called by the new ELF backend linker
2682 to handle the relocations for a section.
2684 The relocs are always passed as Rela structures; if the section
2685 actually uses Rel structures, the r_addend field will always be
2686 zero.
2688 This function is responsible for adjusting the section contents as
2689 necessary, and (if using Rela relocs and generating a relocatable
2690 output file) adjusting the reloc addend as necessary.
2692 This function does not have to worry about setting the reloc
2693 address or the reloc symbol index.
2695 LOCAL_SYMS is a pointer to the swapped in local symbols.
2697 LOCAL_SECTIONS is an array giving the section in the input file
2698 corresponding to the st_shndx field of each local symbol.
2700 The global hash table entry for the global symbols can be found
2701 via elf_sym_hashes (input_bfd).
2703 When generating relocatable output, this function must handle
2704 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2705 going to be the section symbol corresponding to the output
2706 section, which means that the addend must be adjusted
2707 accordingly. */
2709 static bfd_boolean
2720 {
2743 else
2749 else
2755 else
2760 else
2764 {
2770 bfd_vma relocation;
2771 bfd_reloc_status_type r;
2784 /* This is a final link. */
2792 {
2797 name = bfd_elf_string_from_elf_section
2800 }
2801 else
2802 {
2813 {
2815 r_type != R_FRV_TLSMOFF
2817 {
2820 }
2821 else
2822 {
2827 }
2828 }
2830 {
2832 }
2836 else
2837 {
2845 }
2847 }
2850 {
2890 else
2891 /* In order to find the entry we created before, we must
2892 use the original addend, not the one that may have been
2893 modified by _bfd_elf_rela_local_sym(). */
2903 {
2908 }
2913 non_fdpic:
2916 {
2921 }
2923 }
2926 {
2949 }
2951 /* Try to apply TLS relaxations. */
2954 {
2956 #define LOCAL_EXEC_P(info, picrel) \
2957 ((info)->executable \
2958 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2959 #define INITIAL_EXEC_P(info, picrel) \
2960 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2961 && (picrel)->tlsoff_entry)
2963 #define IN_RANGE_FOR_OFST12_P(value) \
2964 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2965 #define IN_RANGE_FOR_SETLOS_P(value) \
2966 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2967 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2968 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2970 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2971 (LOCAL_EXEC_P ((info), (picrel)) \
2972 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2973 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2974 (INITIAL_EXEC_P ((info), (picrel)) \
2975 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2977 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2978 (LOCAL_EXEC_P ((info), (picrel)))
2979 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2980 (INITIAL_EXEC_P ((info), (picrel)))
2982 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2983 (LOCAL_EXEC_P ((info), (picrel)) \
2984 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2989 /* Is this a call instruction? */
2991 {
2997 }
3001 {
3002 /* Replace the call instruction (except the packing bit)
3003 with setlos #tlsmofflo(symbol+offset), gr9. */
3011 }
3014 {
3015 /* Replace the call instruction (except the packing bit)
3016 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
3024 }
3031 /* Is this an lddi instruction? */
3033 {
3039 }
3044 info))
3045 {
3046 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3047 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3048 Preserve the packing bit. */
3058 }
3062 {
3063 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3064 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3065 Preserve the packing bit. */
3075 }
3078 {
3079 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3080 with ldi @(grB, #gottlsoff12(symbol+offset),
3081 gr<C+1>. Preserve the packing bit. If gottlsoff12
3082 overflows, we'll error out, but that's sort-of ok,
3083 since we'd started with gottlsdesc12, that's actually
3084 more demanding. Compiling with -fPIE instead of
3085 -fpie would fix it; linking with --relax should fix
3086 it as well. */
3095 }
3102 /* Is this a sethi instruction? */
3104 {
3110 }
3116 {
3117 /* Replace sethi with a nop. Preserve the packing bit. */
3122 /* Nothing to relocate. */
3124 }
3127 {
3128 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3132 }
3139 /* Is this a setlo or setlos instruction? */
3141 {
3148 }
3154 {
3155 /* Replace setlo/setlos with a nop. Preserve the
3156 packing bit. */
3161 /* Nothing to relocate. */
3163 }
3166 {
3167 /* If the corresponding sethi (if it exists) decayed
3168 to a nop, make sure this becomes (or already is) a
3169 setlos, not setlo. */
3171 {
3174 }
3176 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3180 }
3187 /* Is this an ldd instruction? */
3189 {
3195 }
3200 info))
3201 {
3202 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3203 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3204 Preserve the packing bit. */
3214 }
3218 {
3219 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3220 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3221 Preserve the packing bit. */
3231 }
3235 {
3236 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3237 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3238 Preserve the packing bit. */
3248 }
3251 {
3252 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3253 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3254 Preserve the packing bit. */
3260 /* #tlsoff(symbol+offset) is just a relaxation
3261 annotation, so there's nothing left to
3262 relocate. */
3264 }
3271 /* Is this a calll or callil instruction? */
3273 {
3280 }
3285 info))
3286 {
3287 /* Replace calll with a nop. Preserve the packing bit. */
3292 /* Nothing to relocate. */
3294 }
3298 {
3299 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3300 Preserve the packing bit. */
3308 }
3311 {
3312 /* Replace calll with a nop. Preserve the packing bit. */
3317 /* Nothing to relocate. */
3319 }
3326 /* Is this an ldi instruction? */
3328 {
3334 }
3338 {
3339 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3340 with setlos #tlsmofflo(symbol+offset), grC.
3341 Preserve the packing bit. */
3349 }
3356 /* Is this a sethi instruction? */
3358 {
3364 }
3370 {
3371 /* Replace sethi with a nop. Preserve the packing bit. */
3376 /* Nothing to relocate. */
3378 }
3385 /* Is this a setlo or setlos instruction? */
3387 {
3394 }
3400 {
3401 /* Replace setlo/setlos with a nop. Preserve the
3402 packing bit. */
3407 /* Nothing to relocate. */
3409 }
3416 /* Is this an ld instruction? */
3418 {
3424 }
3428 {
3429 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3430 with setlos #tlsmofflo(symbol+offset), grC.
3431 Preserve the packing bit. */
3439 }
3443 {
3444 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3445 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3446 Preserve the packing bit. */
3454 }
3461 /* Is this a sethi instruction? */
3463 {
3469 }
3472 info))
3473 {
3474 /* Replace sethi with a nop. Preserve the packing bit. */
3479 /* Nothing to relocate. */
3481 }
3488 /* Is this a setlo or setlos instruction? */
3490 {
3497 }
3500 info))
3501 /* If the corresponding sethi (if it exists) decayed
3502 to a nop, make sure this becomes (or already is) a
3503 setlos, not setlo. */
3504 {
3507 }
3511 /*
3512 There's nothing to relax in these:
3513 R_FRV_TLSDESC_VALUE
3514 R_FRV_TLSOFF
3515 R_FRV_TLSMOFF12
3516 R_FRV_TLSMOFFHI
3517 R_FRV_TLSMOFFLO
3518 R_FRV_TLSMOFF
3519 */
3523 }
3526 {
3532 {
3537 }
3538 /* We don't want to warn on calls to undefined weak symbols,
3539 as calls to them must be protected by non-NULL tests
3540 anyway, and unprotected calls would invoke undefined
3541 behavior. */
3545 else
3585 {
3591 {
3592 /* If the symbol is dynamic and there may be dynamic
3593 symbol resolution because we are or are linked with a
3594 shared library, emit a FUNCDESC relocation such that
3595 the dynamic linker will allocate the function
3596 descriptor. If the symbol needs a non-local function
3597 descriptor but binds locally (e.g., its visibility is
3598 protected, emit a dynamic relocation decayed to
3599 section+offset. */
3603 {
3608 }
3610 {
3612 {
3617 }
3619 }
3620 else
3621 {
3622 /* Otherwise, we know we have a private function
3623 descriptor, so reference it directly. */
3631 }
3633 /* If there is room for dynamic symbol resolution, emit
3634 the dynamic relocation. However, if we're linking an
3635 executable at a fixed location, we won't have emitted a
3636 dynamic symbol entry for the got section, so idx will
3637 be zero, which means we can and should compute the
3638 address of the private descriptor ourselves. */
3641 {
3646 {
3648 input_section
3650 {
3656 }
3658 frvfdpic_gotfixup_section
3660 _bfd_elf_section_offset
3663 + input_section
3666 picrel);
3667 }
3668 }
3672 {
3674 input_section
3676 {
3682 }
3685 _bfd_elf_section_offset
3688 + input_section
3692 }
3693 else
3695 }
3697 /* We want the addend in-place because dynamic
3698 relocations are REL. Setting relocation to it should
3699 arrange for it to be installed. */
3701 }
3707 {
3710 }
3711 /* Fall through. */
3713 {
3717 /* If the symbol is dynamic but binds locally, use
3718 section+offset. */
3720 {
3722 {
3727 }
3729 }
3730 else
3731 {
3734 else
3742 else
3744 }
3746 /* If we're linking an executable at a fixed address, we
3747 can omit the dynamic relocation as long as the symbol
3748 is defined in the current link unit (which is implied
3749 by its output section not being NULL). */
3752 {
3759 {
3761 input_section
3763 {
3769 }
3771 {
3773 frvfdpic_gotfixup_section
3775 _bfd_elf_section_offset
3778 + input_section
3781 picrel);
3783 _frvfdpic_add_rofixup
3786 _bfd_elf_section_offset
3791 }
3792 }
3793 }
3794 else
3795 {
3799 {
3801 input_section
3803 {
3809 }
3812 _bfd_elf_section_offset
3815 + input_section
3819 }
3822 /* We want the addend in-place because dynamic
3823 relocations are REL. Setting relocation to it
3824 should arrange for it to be installed. */
3826 }
3829 {
3830 /* If we've omitted the dynamic relocation, just emit
3831 the fixed addresses of the symbol and of the local
3832 GOT base offset. */
3840 else
3841 /* A function descriptor used for lazy or local
3842 resolving is initialized such that its high word
3843 contains the output section index in which the
3844 PLT entries are located, and the low word
3845 contains the offset of the lazy PLT entry entry
3846 point into that section. */
3851 sec
3854 }
3855 }
3902 {
3905 }
3907 {
3911 }
3912 else
3931 /* These shouldn't be present in input object files. */
3938 /* These are just annotations for relaxation, nothing to do
3939 here. */
3948 }
3951 {
3952 /* If you take this out, remove the #error from fdpic-static-6.d
3953 in the ld testsuite. */
3954 /* This helps catch problems in GCC while we can't do more
3955 than static linking. The idea is to test whether the
3956 input file basename is crt0.o only once. */
3958 silence_segment_error =
3967 /* We don't want duplicate errors for undefined
3968 symbols. */
3971 {
3977 else
3982 }
3986 }
3989 {
3992 /* We need the addend to be applied before we shift the
3993 value right. */
3995 /* Fall through. */
4002 /* Fall through. */
4016 }
4019 {
4023 /* Fall through. */
4025 /* When referencing a GOT entry, a function descriptor or a
4026 PLT, we don't want the addend to apply to the reference,
4027 but rather to the referenced symbol. The actual entry
4028 will have already been created taking the addend into
4029 account, so cancel it out here. */
4046 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
4047 here, since we do want to apply the addend to the others.
4048 Note that we've applied the addend to GOTOFFHI before we
4049 shifted it right. */
4057 }
4089 else
4094 {
4098 {
4125 }
4128 {
4133 }
4137 }
4138 }
4141 }
4142 \f
4143 /* Return the section that should be marked against GC for a given
4144 relocation. */
4153 {
4155 {
4157 {
4164 {
4174 }
4175 }
4176 }
4177 else
4181 }
4183 /* Update the got entry reference counts for the section being removed. */
4185 static bfd_boolean
4191 {
4193 }
4195 \f
4196 /* Hook called by the linker routine which adds symbols from an object
4197 file. We use it to put .comm items in .scomm, and not .comm. */
4199 static bfd_boolean
4208 {
4212 {
4213 /* Common symbols less than or equal to -G nn bytes are
4214 automatically put into .sbss. */
4219 {
4221 (SEC_ALLOC
4222 | SEC_IS_COMMON
4226 }
4230 }
4233 }
4235 /* We need dynamic symbols for every section, since segments can
4236 relocate independently. */
4237 static bfd_boolean
4240 ATTRIBUTE_UNUSED,
4242 {
4244 {
4247 /* If sh_type is yet undecided, assume it could be
4248 SHT_PROGBITS/SHT_NOBITS. */
4252 /* There shouldn't be section relative relocations
4253 against any other section. */
4256 }
4257 }
4259 /* Create a .got section, as well as its additional info field. This
4260 is almost entirely copied from
4261 elflink.c:_bfd_elf_create_got_section(). */
4263 static bfd_boolean
4265 {
4274 /* This function may be called more than once. */
4279 /* Machine specific: although pointers are 32-bits wide, we want the
4280 GOT to be aligned to a 64-bit boundary, such that function
4281 descriptors in it can be accessed with 64-bit loads and
4282 stores. */
4295 {
4300 }
4303 {
4304 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4305 (or .got.plt) section. We don't do this in the linker script
4306 because we don't want to define the symbol if we are not creating
4307 a global offset table. */
4313 /* Machine-specific: we want the symbol for executables as
4314 well. */
4317 }
4319 /* The first bit of the global offset table is the header. */
4322 /* This is the machine-specific part. Create and initialize section
4323 data for the got. */
4325 {
4328 frvfdpic_relocs_info_hash,
4329 frvfdpic_relocs_info_eq,
4342 /* Machine-specific. */
4352 }
4353 else
4354 {
4357 }
4359 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4360 turns out that we're linking with a different linker script, the
4361 linker script will override it. */
4372 /* Machine-specific: we want the symbol for executables as well. */
4379 /* FDPIC supports Thread Local Storage, and this may require a
4380 procedure linkage table for TLS PLT entries. */
4382 /* This is mostly copied from
4383 elflink.c:_bfd_elf_create_dynamic_sections(). */
4396 /* FRV-specific: remember it. */
4399 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4400 .plt section. */
4402 {
4408 }
4410 /* FRV-specific: we want rel relocations for the plt. */
4416 /* FRV-specific: remember it. */
4420 }
4422 /* Make sure the got and plt sections exist, and that our pointers in
4423 the link hash table point to them. */
4425 static bfd_boolean
4427 {
4428 /* This is mostly copied from
4429 elflink.c:_bfd_elf_create_dynamic_sections(). */
4430 flagword flags;
4437 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4438 .rel[a].bss sections. */
4440 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4441 way. */
4445 /* FRV-specific: make sure we created everything we wanted. */
4452 {
4453 /* The .dynbss section is a place to put symbols which are defined
4454 by dynamic objects, are referenced by regular objects, and are
4455 not functions. We must allocate space for them in the process
4456 image and use a R_*_COPY reloc to tell the dynamic linker to
4457 initialize them at run time. The linker script puts the .dynbss
4458 section into the .bss section of the final image. */
4464 /* The .rel[a].bss section holds copy relocs. This section is not
4465 normally needed. We need to create it here, though, so that the
4466 linker will map it to an output section. We can't just create it
4467 only if we need it, because we will not know whether we need it
4468 until we have seen all the input files, and the first time the
4469 main linker code calls BFD after examining all the input files
4470 (size_dynamic_sections) the input sections have already been
4471 mapped to the output sections. If the section turns out not to
4472 be needed, we can discard it later. We will never need this
4473 section when generating a shared object, since they do not use
4474 copy relocs. */
4476 {
4484 }
4485 }
4488 }
4490 /* Compute the total GOT and PLT size required by each symbol in each
4491 range. Symbols may require up to 4 words in the GOT: an entry
4492 pointing to the symbol, an entry pointing to its function
4493 descriptor, and a private function descriptors taking two
4494 words. */
4496 static void
4499 {
4500 /* Allocate space for a GOT entry pointing to the symbol. */
4507 else
4511 /* Allocate space for a GOT entry pointing to the function
4512 descriptor. */
4519 else
4523 /* Decide whether we need a PLT entry, a function descriptor in the
4524 GOT, and a lazy PLT entry for this symbol. */
4538 /* Allocate space for a function descriptor. */
4547 else
4553 }
4555 /* Compute the total GOT size required by each TLS symbol in each
4556 range. Symbols may require up to 5 words in the GOT: an entry
4557 holding the TLS offset for the symbol, and an entry with a full TLS
4558 descriptor taking 4 words. */
4560 static void
4563 bfd_boolean subtract)
4564 {
4567 /* Allocate space for a GOT entry with the TLS offset of the
4568 symbol. */
4575 else
4579 /* If there's any TLSOFF relocation, mark the output file as not
4580 suitable for dlopening. This mark will remain even if we relax
4581 all such relocations, but this is not a problem, since we'll only
4582 do so for executables, and we definitely don't want anyone
4583 dlopening executables. */
4587 /* Allocate space for a TLS descriptor. */
4596 else
4599 }
4601 /* Compute the number of dynamic relocations and fixups that a symbol
4602 requires, and add (or subtract) from the grand and per-symbol
4603 totals. */
4605 static void
4608 bfd_boolean subtract)
4609 {
4613 {
4617 /* In the executable, TLS relocations to symbols that bind
4618 locally (including those that resolve to global TLS offsets)
4619 are resolved immediately, without any need for fixups or
4620 dynamic relocations. In shared libraries, however, we must
4621 emit dynamic relocations even for local symbols, because we
4622 don't know the module id the library is going to get at
4623 run-time, nor its TLS base offset. */
4628 }
4629 else
4630 {
4632 {
4638 }
4639 else
4640 {
4643 }
4647 {
4651 }
4652 else
4654 }
4657 {
4661 }
4668 }
4670 /* Look for opportunities to relax TLS relocations. We can assume
4671 we're linking the main executable or a static-tls library, since
4672 otherwise we wouldn't have got here. When relaxing, we have to
4673 first undo any previous accounting of TLS uses of fixups, dynamic
4674 relocations, GOT and PLT entries. */
4676 static void
4679 bfd_boolean relaxing)
4680 {
4687 {
4689 {
4693 }
4695 /* When linking an executable, we can always decay GOTTLSDESC to
4696 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4697 When linking a static-tls shared library, using TLSMOFF is
4698 not an option, but we can still use GOTTLSOFF. When decaying
4699 to GOTTLSOFF, we must keep the GOT entry in range. We know
4700 it has to fit because we'll be trading the 4 words of hte TLS
4701 descriptor for a single word in the same range. */
4705 {
4709 }
4712 }
4714 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4715 main executable. We have to check whether the symbol's TLSOFF is
4716 in range for a setlos. For symbols with a hash entry, we can
4717 determine exactly what to do; for others locals, we don't have
4718 addresses handy, so we use the size of the TLS section as an
4719 approximation. If we get it wrong, we'll retain a GOT entry
4720 holding the TLS offset (without dynamic relocations or fixups),
4721 but we'll still optimize away the loads from it. Since TLS sizes
4722 are generally very small, it's probably not worth attempting to
4723 do better than this. */
4729 /* The above may hold for an undefweak TLS symbol, so make
4730 sure we don't have this case before accessing def.value
4731 and def.section. */
4743 {
4745 {
4749 }
4753 }
4755 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4756 have a #gottlsoff12 relocation for this entry, or if we can fit
4757 one more in the 12-bit (and 16-bit) ranges. */
4760 || (relaxing
4765 {
4767 {
4771 }
4775 }
4778 {
4781 }
4784 }
4786 /* Compute the total GOT and PLT size required by each symbol in each range. *
4787 Symbols may require up to 4 words in the GOT: an entry pointing to
4788 the symbol, an entry pointing to its function descriptor, and a
4789 private function descriptors taking two words. */
4791 static int
4793 {
4801 else
4802 {
4805 }
4808 }
4810 /* Determine the positive and negative ranges to be used by each
4811 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4812 double-word boundary, are the minimum (negative) and maximum
4813 (positive) GOT offsets already used by previous ranges, except for
4814 an ODD entry that may have been left behind. GOT and FD indicate
4815 the size of GOT entries and function descriptors that must be
4816 placed within the range from -WRAP to WRAP. If there's room left,
4817 up to FDPLT bytes should be reserved for additional function
4818 descriptors. */
4822 bfd_signed_vma fdcur,
4823 bfd_signed_vma odd,
4824 bfd_signed_vma cur,
4825 bfd_vma got,
4826 bfd_vma fd,
4827 bfd_vma fdplt,
4828 bfd_vma tlsd,
4829 bfd_vma tlsdplt,
4830 bfd_vma wrap)
4831 {
4835 /* Start at the given initial points. */
4839 /* If we had an incoming odd word and we have any got entries that
4840 are going to use it, consume it, otherwise leave gad->odd at
4841 zero. We might force gad->odd to zero and return the incoming
4842 odd such that it is used by the next range, but then GOT entries
4843 might appear to be out of order and we wouldn't be able to
4844 shorten the GOT by one word if it turns out to end with an
4845 unpaired GOT entry. */
4847 {
4851 }
4852 else
4855 /* If we're left with an unpaired GOT entry, compute its location
4856 such that we can return it. Otherwise, if got doesn't require an
4857 odd number of words here, either odd was already zero in the
4858 block above, or it was set to zero because got was non-zero, or
4859 got was already zero. In the latter case, we want the value of
4860 odd to carry over to the return statement, so we don't want to
4861 reset odd unless the condition below is true. */
4863 {
4866 }
4868 /* Compute the tentative boundaries of this range. */
4873 /* If function descriptors took too much space, wrap some of them
4874 around. */
4876 {
4879 }
4881 /* If GOT entries took too much space, wrap some of them around.
4882 This may well cause gad->min to become lower than wrapmin. This
4883 will cause a relocation overflow later on, so we don't have to
4884 report it here . */
4886 {
4889 }
4891 /* Add TLS descriptors. */
4896 /* If TLS descriptors took too much space, wrap an integral number
4897 of them around. */
4899 {
4907 }
4909 /* If there is space left and we have function descriptors
4910 referenced in PLT entries that could take advantage of shorter
4911 offsets, place them now. */
4913 {
4914 bfd_vma fds;
4918 else
4925 }
4927 /* If there is more space left, try to place some more function
4928 descriptors for PLT entries. */
4930 {
4931 bfd_vma fds;
4935 else
4942 }
4944 /* If there is space left and we have TLS descriptors referenced in
4945 PLT entries that could take advantage of shorter offsets, place
4946 them now. */
4948 {
4949 bfd_vma tlsds;
4953 else
4959 }
4961 /* If there is more space left, try to place some more TLS
4962 descriptors for PLT entries. Although we could try to fit an
4963 additional TLS descriptor with half of it just before before the
4964 wrap point and another right past the wrap point, this might
4965 cause us to run out of space for the next region, so don't do
4966 it. */
4968 {
4969 bfd_vma tlsds;
4973 else
4979 }
4981 /* If odd was initially computed as an offset past the wrap point,
4982 wrap it around. */
4986 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4987 before returning, so do it here too. This guarantees that,
4988 should cur and fdcur meet at the wrap point, they'll both be
4989 equal to min. */
4993 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4999 }
5001 /* Compute the location of the next GOT entry, given the allocation
5002 data for a range. */
5006 {
5007 bfd_signed_vma ret;
5010 {
5011 /* If there was an odd word left behind, use it. */
5014 }
5015 else
5016 {
5017 /* Otherwise, use the word pointed to by cur, reserve the next
5018 as an odd word, and skip to the next pair of words, possibly
5019 wrapping around. */
5025 }
5028 }
5030 /* Compute the location of the next function descriptor entry in the
5031 GOT, given the allocation data for a range. */
5035 {
5036 /* If we're at the bottom, wrap around, and only then allocate the
5037 next pair of words. */
5041 }
5043 /* Compute the location of the next TLS descriptor entry in the GOT,
5044 given the allocation data for a range. */
5047 {
5048 bfd_signed_vma ret;
5054 /* If we're at the top of the region, wrap around to the bottom. */
5059 }
5061 /* Assign GOT offsets for every GOT entry and function descriptor.
5062 Doing everything in a single pass is tricky. */
5064 static int
5066 {
5087 {
5090 }
5094 {
5097 }
5099 {
5102 }
5116 {
5119 }
5123 {
5126 }
5128 {
5131 }
5136 }
5138 /* Assign GOT offsets to private function descriptors used by PLT
5139 entries (or referenced by 32-bit offsets), as well as PLT entries
5140 and lazy PLT entries. */
5142 static int
5144 {
5152 {
5155 /* We use the section's raw size to mark the location of the
5156 next PLT entry. */
5159 /* Figure out the length of this PLT entry based on the
5160 addressing mode we need to reach the function descriptor. */
5168 else
5172 }
5175 {
5178 /* If this entry is the one that gets the resolver stub, account
5179 for the additional instruction. */
5183 }
5186 {
5189 entry->tlsplt_entry
5195 {
5197 /* FIXME: here we use the size of the TLS section
5198 as an upper bound for the value of the TLS
5199 symbol, because we may not know the exact value
5200 yet. If we get it wrong, we'll just waste a
5201 word in the PLT, and we should never get even
5202 close to 32 KiB of TLS anyway. */
5207 else
5209 }
5211 {
5218 else
5220 }
5221 else
5222 {
5231 else
5233 }
5236 }
5239 }
5241 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5242 _frvfdpic_assign_plt_entries. */
5244 static int
5246 {
5259 }
5261 /* Follow indirect and warning hash entries so that each got entry
5262 points to the final symbol definition. P must point to a pointer
5263 to the hash table we're traversing. Since this traversal may
5264 modify the hash table, we set this pointer to NULL to indicate
5265 we've made a potentially-destructive change to the hash table, so
5266 the traversal must be restarted. */
5267 static int
5269 {
5274 {
5286 NO_INSERT);
5289 {
5290 /* Merge the two entries. */
5294 }
5298 /* If we can't find this entry with the new bfd hash, re-insert
5299 it, and get the traversal restarted. */
5301 {
5306 /* Abort the traversal, since the whole table may have
5307 moved, and leave it up to the parent to restart the
5308 process. */
5311 }
5312 }
5315 }
5317 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5318 section and the rofixup section. Assign locations for GOT and PLT
5319 entries. */
5321 static bfd_boolean
5324 {
5325 bfd_signed_vma odd;
5334 /* Compute the total size taken by entries in the 12-bit and 16-bit
5335 ranges, to tell how many PLT function descriptors we can bring
5336 into the 12-bit range without causing the 16-bit range to
5337 overflow. */
5343 else
5346 {
5349 }
5350 else
5355 /* Determine the ranges of GOT offsets that we can use for each
5356 range of addressing modes. */
5359 odd,
5363 limit,
5365 tlslimit,
5369 odd,
5381 odd,
5394 /* Now assign (most) GOT offsets. */
5396 gpinfop);
5400 /* If an odd word is the last word of the GOT, we don't need this
5401 word to be part of the GOT. */
5407 {
5410 }
5411 /* This will be non-NULL during relaxation. The assumption is that
5412 the size of one of these sections will never grow, only shrink,
5413 so we can use the larger buffer we allocated before. */
5415 {
5421 }
5424 /* Subtract the number of lzplt entries, since those will generate
5425 relocations in the pltrel section. */
5429 else
5434 {
5440 }
5446 {
5452 }
5455 {
5462 {
5468 }
5469 }
5471 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5472 such that there's room for the additional instruction needed to
5473 call the resolver. Since _frvfdpic_assign_got_entries didn't
5474 account for them, our block size is 4 bytes smaller than the real
5475 block size. */
5477 {
5481 }
5483 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5484 actually assign lazy PLT entries addresses. */
5487 /* Save information that we're going to need to generate GOT and PLT
5488 entries. */
5499 /* Allocate a ret statement at plt_initial_offset, to be used by
5500 locally-resolved TLS descriptors. */
5505 gpinfop);
5507 /* Allocate the PLT section contents only after
5508 _frvfdpic_assign_plt_entries has a chance to add the size of the
5509 non-lazy PLT entries. */
5511 {
5515 {
5521 }
5522 }
5525 }
5527 /* Set the sizes of the dynamic sections. */
5529 static bfd_boolean
5532 {
5541 {
5542 /* Set the contents of the .interp section to the interpreter. */
5544 {
5549 }
5550 }
5556 {
5563 }
5568 /* Allocate space to save the summary information, we're going to
5569 use it if we're doing relaxations. */
5576 {
5593 }
5596 }
5598 static bfd_boolean
5601 {
5603 {
5607 /* Force a PT_GNU_STACK segment to be created. */
5611 /* Define __stacksize if it's not defined yet. */
5617 {
5630 /* This one must NOT be hidden. */
5631 }
5633 /* Create a stack section, and set its alignment. */
5639 }
5642 }
5644 /* Look for opportunities to relax TLS relocations. We can assume
5645 we're linking the main executable or a static-tls library, since
5646 otherwise we wouldn't have got here. */
5648 static int
5650 {
5657 }
5659 static bfd_boolean
5662 {
5665 /* If we return early, we didn't change anything. */
5668 /* We'll do our thing when requested to relax the GOT section. */
5672 /* We can only relax when linking the main executable or a library
5673 that can't be dlopened. */
5677 /* If there isn't a TLS section for this binary, we can't do
5678 anything about its TLS relocations (it probably doesn't have
5679 any. */
5686 /* Now look for opportunities to relax, adjusting the GOT usage
5687 as needed. */
5689 _frvfdpic_relax_got_plt_entries,
5692 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5695 {
5696 /* Clear GOT and PLT assignments. */
5698 _frvfdpic_reset_got_plt_entries,
5699 NULL);
5701 /* The owner of the TLS section is the output bfd. There should
5702 be a better way to get to it. */
5707 /* Repeat until we don't make any further changes. We could fail to
5708 introduce changes in a round if, for example, the 12-bit range is
5709 full, but we later release some space by getting rid of TLS
5710 descriptors in it. We have to repeat the whole process because
5711 we might have changed the size of a section processed before this
5712 one. */
5714 }
5717 }
5719 static bfd_boolean
5722 {
5725 /* objcopy and strip preserve what's already there using
5726 elf32_frvfdpic_copy_private_bfd_data (). */
5735 {
5740 {
5741 /* Obtain the pointer to the __stacksize symbol. */
5749 /* Set the section size from the symbol value. We
5750 intentionally ignore the symbol section. */
5753 else
5756 /* Add the stack section to the PT_GNU_STACK segment,
5757 such that its size and alignment requirements make it
5758 to the segment. */
5761 }
5762 }
5765 }
5767 /* Fill in code and data in dynamic sections. */
5769 static bfd_boolean
5772 {
5773 /* Nothing to be done for non-FDPIC. */
5775 }
5777 static bfd_boolean
5780 {
5787 {
5789 }
5791 {
5797 {
5809 {
5810 error:
5814 }
5821 {
5822 bfd_vma value =
5831 }
5832 }
5833 }
5835 {
5839 }
5843 {
5855 {
5856 Elf_Internal_Dyn dyn;
5861 {
5883 }
5884 }
5885 }
5888 }
5890 /* Adjust a symbol defined by a dynamic object and referenced by a
5891 regular object. */
5893 static bfd_boolean
5894 elf32_frvfdpic_adjust_dynamic_symbol
5897 {
5902 /* Make sure we know what is going on here. */
5909 /* If this is a weak symbol, and there is a real definition, the
5910 processor independent code will have arranged for us to see the
5911 real definition first, and we can just use the same value. */
5913 {
5918 }
5921 }
5923 /* Perform any actions needed for dynamic symbols. */
5925 static bfd_boolean
5926 elf32_frvfdpic_finish_dynamic_symbol
5931 {
5933 }
5935 /* Decide whether to attempt to turn absptr or lsda encodings in
5936 shared libraries into pcrel within the given input section. */
5938 static bfd_boolean
5939 frvfdpic_elf_use_relative_eh_frame
5943 {
5944 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
5946 }
5948 /* Adjust the contents of an eh_frame_hdr section before they're output. */
5950 static bfd_byte
5956 {
5968 == (_frvfdpic_osec_to_segment
5977 }
5979 /* Look through the relocs for a section during the first phase.
5981 Besides handling virtual table relocs for gc, we have to deal with
5982 all sorts of PIC-related relocations. We describe below the
5983 general plan on how to handle such relocations, even though we only
5984 collect information at this point, storing them in hash tables for
5985 perusal of later passes.
5987 32 relocations are propagated to the linker output when creating
5988 position-independent output. LO16 and HI16 relocations are not
5989 supposed to be encountered in this case.
5991 LABEL16 should always be resolvable by the linker, since it's only
5992 used by branches.
5994 LABEL24, on the other hand, is used by calls. If it turns out that
5995 the target of a call is a dynamic symbol, a PLT entry must be
5996 created for it, which triggers the creation of a private function
5997 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
5999 GPREL relocations require the referenced symbol to be in the same
6000 segment as _gp, but this can only be checked later.
6002 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
6003 exist. LABEL24 might as well, since it may require a PLT entry,
6004 that will require a got.
6006 Non-FUNCDESC GOT relocations require a GOT entry to be created
6007 regardless of whether the symbol is dynamic. However, since a
6008 global symbol that turns out to not be exported may have the same
6009 address of a non-dynamic symbol, we don't assign GOT entries at
6010 this point, such that we can share them in this case. A relocation
6011 for the GOT entry always has to be created, be it to offset a
6012 private symbol by the section load address, be it to get the symbol
6013 resolved dynamically.
6015 FUNCDESC GOT relocations require a GOT entry to be created, and
6016 handled as if a FUNCDESC relocation was applied to the GOT entry in
6017 an object file.
6019 FUNCDESC relocations referencing a symbol that turns out to NOT be
6020 dynamic cause a private function descriptor to be created. The
6021 FUNCDESC relocation then decays to a 32 relocation that points at
6022 the private descriptor. If the symbol is dynamic, the FUNCDESC
6023 relocation is propagated to the linker output, such that the
6024 dynamic linker creates the canonical descriptor, pointing to the
6025 dynamically-resolved definition of the function.
6027 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
6028 symbols that are assigned to the same segment as the GOT, but we
6029 can only check this later, after we know the complete set of
6030 symbols defined and/or exported.
6032 FUNCDESC GOTOFF relocations require a function descriptor to be
6033 created and, unless lazy binding is disabled or the symbol is not
6034 dynamic, a lazy PLT entry. Since we can't tell at this point
6035 whether a symbol is going to be dynamic, we have to decide later
6036 whether to create a lazy PLT entry or bind the descriptor directly
6037 to the private function.
6039 FUNCDESC_VALUE relocations are not supposed to be present in object
6040 files, but they may very well be simply propagated to the linker
6041 output, since they have no side effect.
6044 A function descriptor always requires a FUNCDESC_VALUE relocation.
6045 Whether it's in .plt.rel or not depends on whether lazy binding is
6046 enabled and on whether the referenced symbol is dynamic.
6048 The existence of a lazy PLT requires the resolverStub lazy PLT
6049 entry to be present.
6052 As for assignment of GOT, PLT and lazy PLT entries, and private
6053 descriptors, we might do them all sequentially, but we can do
6054 better than that. For example, we can place GOT entries and
6055 private function descriptors referenced using 12-bit operands
6056 closer to the PIC register value, such that these relocations don't
6057 overflow. Those that are only referenced with LO16 relocations
6058 could come next, but we may as well place PLT-required function
6059 descriptors in the 12-bit range to make them shorter. Symbols
6060 referenced with LO16/HI16 may come next, but we may place
6061 additional function descriptors in the 16-bit range if we can
6062 reliably tell that we've already placed entries that are ever
6063 referenced with only LO16. PLT entries are therefore generated as
6064 small as possible, while not introducing relocation overflows in
6065 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6066 generated before or after PLT entries, but not intermingled with
6067 them, such that we can have more lazy PLT entries in range for a
6068 branch to the resolverStub. The resolverStub should be emitted at
6069 the most distant location from the first lazy PLT entry such that
6070 it's still in range for a branch, or closer, if there isn't a need
6071 for so many lazy PLT entries. Additional lazy PLT entries may be
6072 emitted after the resolverStub, as long as branches are still in
6073 range. If the branch goes out of range, longer lazy PLT entries
6074 are emitted.
6076 We could further optimize PLT and lazy PLT entries by giving them
6077 priority in assignment to closer-to-gr17 locations depending on the
6078 number of occurrences of references to them (assuming a function
6079 that's called more often is more important for performance, so its
6080 PLT entry should be faster), or taking hints from the compiler.
6081 Given infinite time and money... :-) */
6083 static bfd_boolean
6089 {
6109 {
6116 else
6117 {
6122 }
6125 {
6155 /* Fall through. */
6163 {
6167 }
6169 {
6172 }
6174 {
6177 {
6184 }
6185 picrel
6189 }
6190 else
6201 }
6204 {
6214 /* Fall through. */
6302 /* This relocation describes the C++ object vtable hierarchy.
6303 Reconstruct it for later use during GC. */
6309 /* This relocation describes which C++ vtable entries are actually
6310 used. Record for later use during GC. */
6330 bad_reloc:
6335 }
6336 }
6339 }
6341 \f
6342 /* Return the machine subcode from the ELF e_flags header. */
6344 static int
6347 {
6349 {
6359 }
6362 }
6364 /* Set the right machine number for a FRV ELF file. */
6366 static bfd_boolean
6369 {
6373 }
6374 \f
6375 /* Function to set the ELF flag bits. */
6377 static bfd_boolean
6380 flagword flags;
6381 {
6385 }
6387 /* Copy backend specific data from one object module to another. */
6389 static bfd_boolean
6393 {
6404 }
6406 /* Return true if the architecture described by elf header flag
6407 EXTENSION is an extension of the architecture described by BASE. */
6409 static bfd_boolean
6411 {
6415 /* CPU_GENERIC code can be merged with code for a specific
6416 architecture, in which case the result is marked as being
6417 for the specific architecture. Everything is therefore
6418 an extension of CPU_GENERIC. */
6431 }
6433 static bfd_boolean
6435 {
6449 /* Copy the stack size. */
6452 {
6457 {
6460 /* Rewrite the phdrs, since we're only called after they
6461 were first written. */
6469 }
6472 }
6475 }
6477 /* Merge backend specific data from an object file to the output
6478 object file when linking. */
6480 static bfd_boolean
6484 {
6498 #ifdef DEBUG
6502 #endif
6505 {
6508 }
6511 ;
6514 {
6515 /* Warn if different # of gprs are used. Note, 0 means nothing is
6516 said about the size of gprs. */
6520 ;
6523 ;
6528 else
6529 {
6531 {
6535 }
6538 {
6542 }
6543 }
6545 /* Warn if different # of fprs are used. Note, 0 means nothing is
6546 said about the size of fprs. */
6550 ;
6553 ;
6558 else
6559 {
6561 {
6566 }
6569 {
6574 }
6575 }
6577 /* Warn if different dword support was used. Note, 0 means nothing is
6578 said about the dword support. */
6582 ;
6585 ;
6590 else
6591 {
6593 {
6597 }
6600 {
6604 }
6605 }
6607 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6608 feature is used. */
6610 | EF_FRV_MEDIA
6611 | EF_FRV_MULADD
6614 /* If any module was compiled without -G0, clear the G0 bit. */
6618 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6622 /* We don't have to do anything if the pic flags are the same, or the new
6623 module(s) were compiled with -mlibrary-pic. */
6627 ;
6629 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6630 flags if any from the new module. */
6634 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6638 /* One module was compiled for pic and the other was not, see if we have
6639 had any relocations that are not pic-safe. */
6640 else
6641 {
6644 else
6645 {
6647 #ifndef FRV_NO_PIC_ERROR
6653 #endif
6654 }
6655 }
6657 /* Warn if different cpu is used (allow a specific cpu to override
6658 the generic cpu). */
6662 ;
6667 else
6668 {
6670 {
6681 }
6684 {
6695 }
6696 }
6698 /* Print out any mismatches from above. */
6700 {
6705 }
6707 /* Warn about any other mismatches */
6711 {
6717 }
6718 }
6720 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6724 /* Update the old flags now with changes made above. */
6732 {
6738 else
6742 }
6748 }
6750 \f
6751 bfd_boolean
6754 PTR ptr;
6755 {
6757 flagword flags;
6761 /* Print normal ELF private data. */
6768 {
6778 }
6781 {
6785 }
6788 {
6793 }
6796 {
6800 }
6831 }
6833 \f
6834 /* Support for core dump NOTE sections. */
6836 static bfd_boolean
6838 {
6843 {
6847 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6848 hardcoded offsets and sizes listed below (and contained within
6849 this lexical block) refer to fields in the target's elf_prstatus
6850 struct. */
6852 /* `pr_cursig' is at offset 12. */
6855 /* `pr_pid' is at offset 24. */
6858 /* `pr_reg' is at offset 72. */
6861 /* Most grok_prstatus implementations set `raw_size' to the size
6862 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6863 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6864 and `pr_interp_fdpic_loadmap', both of which (by design)
6865 immediately follow `pr_reg'. This will allow these fields to
6866 be viewed by GDB as registers.
6868 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6869 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6873 }
6875 /* Make a ".reg/999" section. */
6878 }
6880 static bfd_boolean
6882 {
6884 {
6888 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6891 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6895 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6898 }
6900 /* Note that for some reason, a spurious space is tacked
6901 onto the end of the args in some (at least one anyway)
6902 implementations, so strip it off if it exists. */
6904 {
6910 }
6913 }
6914 #define ELF_ARCH bfd_arch_frv
6915 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6916 #define ELF_MAXPAGESIZE 0x1000
6918 #define TARGET_BIG_SYM bfd_elf32_frv_vec
6921 #define elf_info_to_howto frv_info_to_howto_rela
6922 #define elf_backend_relocate_section elf32_frv_relocate_section
6923 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6924 #define elf_backend_gc_sweep_hook elf32_frv_gc_sweep_hook
6925 #define elf_backend_check_relocs elf32_frv_check_relocs
6926 #define elf_backend_object_p elf32_frv_object_p
6927 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
6929 #define elf_backend_can_gc_sections 1
6930 #define elf_backend_rela_normal 1
6932 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
6933 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
6934 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
6935 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
6936 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
6938 #define elf_backend_want_got_sym 1
6939 #define elf_backend_got_header_size 0
6940 #define elf_backend_want_got_plt 0
6941 #define elf_backend_plt_readonly 1
6942 #define elf_backend_want_plt_sym 0
6943 #define elf_backend_plt_header_size 0
6945 #define elf_backend_finish_dynamic_sections \
6946 elf32_frv_finish_dynamic_sections
6948 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
6949 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
6953 #undef ELF_MAXPAGESIZE
6954 #define ELF_MAXPAGESIZE 0x4000
6956 #undef TARGET_BIG_SYM
6957 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
6958 #undef TARGET_BIG_NAME
6960 #undef elf32_bed
6961 #define elf32_bed elf32_frvfdpic_bed
6963 #undef elf_info_to_howto_rel
6964 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
6966 #undef bfd_elf32_bfd_link_hash_table_create
6967 #define bfd_elf32_bfd_link_hash_table_create \
6968 frvfdpic_elf_link_hash_table_create
6969 #undef elf_backend_always_size_sections
6970 #define elf_backend_always_size_sections \
6971 elf32_frvfdpic_always_size_sections
6972 #undef elf_backend_modify_segment_map
6973 #define elf_backend_modify_segment_map \
6974 elf32_frvfdpic_modify_segment_map
6975 #undef bfd_elf32_bfd_copy_private_bfd_data
6976 #define bfd_elf32_bfd_copy_private_bfd_data \
6977 elf32_frvfdpic_copy_private_bfd_data
6979 #undef elf_backend_create_dynamic_sections
6980 #define elf_backend_create_dynamic_sections \
6981 elf32_frvfdpic_create_dynamic_sections
6982 #undef elf_backend_adjust_dynamic_symbol
6983 #define elf_backend_adjust_dynamic_symbol \
6984 elf32_frvfdpic_adjust_dynamic_symbol
6985 #undef elf_backend_size_dynamic_sections
6986 #define elf_backend_size_dynamic_sections \
6987 elf32_frvfdpic_size_dynamic_sections
6988 #undef bfd_elf32_bfd_relax_section
6989 #define bfd_elf32_bfd_relax_section \
6990 elf32_frvfdpic_relax_section
6991 #undef elf_backend_finish_dynamic_symbol
6992 #define elf_backend_finish_dynamic_symbol \
6993 elf32_frvfdpic_finish_dynamic_symbol
6994 #undef elf_backend_finish_dynamic_sections
6995 #define elf_backend_finish_dynamic_sections \
6996 elf32_frvfdpic_finish_dynamic_sections
6998 #undef elf_backend_can_make_relative_eh_frame
6999 #define elf_backend_can_make_relative_eh_frame \
7000 frvfdpic_elf_use_relative_eh_frame
7001 #undef elf_backend_can_make_lsda_relative_eh_frame
7002 #define elf_backend_can_make_lsda_relative_eh_frame \
7003 frvfdpic_elf_use_relative_eh_frame
7004 #undef elf_backend_encode_eh_address
7005 #define elf_backend_encode_eh_address \
7006 frvfdpic_elf_encode_eh_address
7008 #undef elf_backend_may_use_rel_p
7009 #define elf_backend_may_use_rel_p 1
7010 #undef elf_backend_may_use_rela_p
7011 #define elf_backend_may_use_rela_p 1
7012 /* We use REL for dynamic relocations only. */
7013 #undef elf_backend_default_use_rela_p
7014 #define elf_backend_default_use_rela_p 1
7016 #undef elf_backend_omit_section_dynsym
7017 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym