| blob | 2aff005066bcae85b5b763874fbfb81d525b6eff |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
30 /* Forward declarations. */
31 static bfd_reloc_status_type elf32_frv_relocate_lo16
33 static bfd_reloc_status_type elf32_frv_relocate_hi16
35 static bfd_reloc_status_type elf32_frv_relocate_label24
37 static bfd_reloc_status_type elf32_frv_relocate_gprel12
40 static bfd_reloc_status_type elf32_frv_relocate_gprelu12
43 static bfd_reloc_status_type elf32_frv_relocate_gprello
46 static bfd_reloc_status_type elf32_frv_relocate_gprelhi
51 static void frv_info_to_howto_rela
53 static bfd_boolean elf32_frv_relocate_section
56 static bfd_boolean elf32_frv_add_symbol_hook
59 static bfd_reloc_status_type frv_final_link_relocate
62 static bfd_boolean elf32_frv_check_relocs
65 static int elf32_frv_machine
67 static bfd_boolean elf32_frv_object_p
69 static bfd_boolean frv_elf_set_private_flags
71 static bfd_boolean frv_elf_copy_private_bfd_data
73 static bfd_boolean frv_elf_merge_private_bfd_data
75 static bfd_boolean frv_elf_print_private_bfd_data
83 {
84 /* This reloc does nothing. */
99 /* A 32 bit absolute relocation. */
114 /* A 16 bit pc-relative relocation. */
129 /* A 24-bit pc-relative relocation. */
242 /* A 12-bit signed operand with the GOT offset for the address of
243 the symbol. */
258 /* The upper 16 bits of the GOT offset for the address of the
259 symbol. */
274 /* The lower 16 bits of the GOT offset for the address of the
275 symbol. */
290 /* The 32-bit address of the canonical descriptor of a function. */
305 /* A 12-bit signed operand with the GOT offset for the address of
306 canonical descriptor of a function. */
321 /* The upper 16 bits of the GOT offset for the address of the
322 canonical descriptor of a function. */
337 /* The lower 16 bits of the GOT offset for the address of the
338 canonical descriptor of a function. */
353 /* The 64-bit descriptor of a function. */
368 /* A 12-bit signed operand with the GOT offset for the address of
369 canonical descriptor of a function. */
384 /* The upper 16 bits of the GOT offset for the address of the
385 canonical descriptor of a function. */
400 /* The lower 16 bits of the GOT offset for the address of the
401 canonical descriptor of a function. */
416 /* A 12-bit signed operand with the GOT offset for the address of
417 the symbol. */
432 /* The upper 16 bits of the GOT offset for the address of the
433 symbol. */
448 /* The lower 16 bits of the GOT offset for the address of the
449 symbol. */
464 /* A 24-bit pc-relative relocation referencing the TLS PLT entry for
465 a thread-local symbol. If the symbol number is 0, it refers to
466 the module. */
481 /* A 64-bit TLS descriptor for a symbol. This relocation is only
482 valid as a REL, dynamic relocation. */
497 /* A 12-bit signed operand with the GOT offset for the TLS
498 descriptor of the symbol. */
513 /* The upper 16 bits of the GOT offset for the TLS descriptor of the
514 symbol. */
529 /* The lower 16 bits of the GOT offset for the TLS descriptor of the
530 symbol. */
545 /* A 12-bit signed operand with the offset from the module base
546 address to the thread-local symbol address. */
561 /* The upper 16 bits of the offset from the module base address to
562 the thread-local symbol address. */
577 /* The lower 16 bits of the offset from the module base address to
578 the thread-local symbol address. */
593 /* A 12-bit signed operand with the GOT offset for the TLSOFF entry
594 for a symbol. */
609 /* The upper 16 bits of the GOT offset for the TLSOFF entry for a
610 symbol. */
625 /* The lower 16 bits of the GOT offset for the TLSOFF entry for a
626 symbol. */
641 /* The 32-bit offset from the thread pointer (not the module base
642 address) to a thread-local symbol. */
657 /* An annotation for linker relaxation, that denotes the
658 symbol+addend whose TLS descriptor is referenced by the sum of
659 the two input registers of an ldd instruction. */
674 /* An annotation for linker relaxation, that denotes the
675 symbol+addend whose TLS resolver entry point is given by the sum
676 of the two register operands of an calll instruction. */
691 /* An annotation for linker relaxation, that denotes the
692 symbol+addend whose TLS offset GOT entry is given by the sum of
693 the two input registers of an ld instruction. */
708 /* A 32-bit offset from the module base address to
709 the thread-local symbol address. */
723 };
725 /* GNU extension to record C++ vtable hierarchy. */
741 /* GNU extension to record C++ vtable member usage. */
757 /* The following 3 relocations are REL. The only difference to the
758 entries in the table above are that partial_inplace is TRUE. */
805 /* A 64-bit TLS descriptor for a symbol. The first word resolves to
806 an entry point, and the second resolves to a special argument.
807 If the symbol turns out to be in static TLS, the entry point is a
808 return instruction, and the special argument is the TLS offset
809 for the symbol. If it's in dynamic TLS, the entry point is a TLS
810 offset resolver, and the special argument is a pointer to a data
811 structure allocated by the dynamic loader, containing the GOT
812 address for the offset resolver, the module id, the offset within
813 the module, and anything else the TLS offset resolver might need
814 to determine the TLS offset for the symbol in the running
815 thread. */
831 /* The 32-bit offset from the thread pointer (not the module base
832 address) to a thread-local symbol. */
848 \f
850 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_frvfdpic_vec)
852 /* An extension of the elf hash table data structure, containing some
853 additional FRV-specific data. */
854 struct frvfdpic_elf_link_hash_table
855 {
858 /* A pointer to the .got section. */
860 /* A pointer to the .rel.got section. */
862 /* A pointer to the .rofixup section. */
864 /* A pointer to the .plt section. */
866 /* A pointer to the .rel.plt section. */
868 /* GOT base offset. */
869 bfd_vma got0;
870 /* Location of the first non-lazy PLT entry, i.e., the number of
871 bytes taken by lazy PLT entries. If locally-bound TLS
872 descriptors require a ret instruction, it will be placed at this
873 offset. */
874 bfd_vma plt0;
875 /* A hash table holding information about which symbols were
876 referenced with which PIC-related relocations. */
878 /* Summary reloc information collected by
879 _frvfdpic_count_got_plt_entries. */
881 };
883 /* Get the FRV ELF linker hash table from a link_info structure. */
885 #define frvfdpic_hash_table(info) \
886 ((struct frvfdpic_elf_link_hash_table *) ((info)->hash))
888 #define frvfdpic_got_section(info) \
889 (frvfdpic_hash_table (info)->sgot)
890 #define frvfdpic_gotrel_section(info) \
891 (frvfdpic_hash_table (info)->sgotrel)
892 #define frvfdpic_gotfixup_section(info) \
893 (frvfdpic_hash_table (info)->sgotfixup)
894 #define frvfdpic_plt_section(info) \
895 (frvfdpic_hash_table (info)->splt)
896 #define frvfdpic_pltrel_section(info) \
897 (frvfdpic_hash_table (info)->spltrel)
898 #define frvfdpic_relocs_info(info) \
899 (frvfdpic_hash_table (info)->relocs_info)
900 #define frvfdpic_got_initial_offset(info) \
901 (frvfdpic_hash_table (info)->got0)
902 #define frvfdpic_plt_initial_offset(info) \
903 (frvfdpic_hash_table (info)->plt0)
904 #define frvfdpic_dynamic_got_plt_info(info) \
905 (frvfdpic_hash_table (info)->g)
907 /* Currently it's the same, but if some day we have a reason to change
908 it, we'd better be using a different macro.
910 FIXME: if there's any TLS PLT entry that uses local-exec or
911 initial-exec models, we could use the ret at the end of any of them
912 instead of adding one more. */
913 #define frvfdpic_plt_tls_ret_offset(info) \
914 (frvfdpic_plt_initial_offset (info))
916 /* The name of the dynamic interpreter. This is put in the .interp
917 section. */
921 #define DEFAULT_STACK_SIZE 0x20000
923 /* This structure is used to collect the number of entries present in
924 each addressable range of the got. */
925 struct _frvfdpic_dynamic_got_info
926 {
927 /* Several bits of information about the current link. */
929 /* Total GOT size needed for GOT entries within the 12-, 16- or 32-bit
930 ranges. */
932 /* Total GOT size needed for function descriptor entries within the 12-,
933 16- or 32-bit ranges. */
935 /* Total GOT size needed by function descriptor entries referenced
936 in PLT entries, that would be profitable to place in offsets
937 close to the PIC register. */
938 bfd_vma fdplt;
939 /* Total PLT size needed by lazy PLT entries. */
940 bfd_vma lzplt;
941 /* Total GOT size needed for TLS descriptor entries within the 12-,
942 16- or 32-bit ranges. */
944 /* Total GOT size needed by TLS descriptors referenced in PLT
945 entries, that would be profitable to place in offers close to the
946 PIC register. */
947 bfd_vma tlsdplt;
948 /* Total PLT size needed by TLS lazy PLT entries. */
949 bfd_vma tlslzplt;
950 /* Number of relocations carried over from input object files. */
952 /* Number of fixups introduced by relocations in input object files. */
954 /* The number of fixups that reference the ret instruction added to
955 the PLT for locally-resolved TLS descriptors. */
957 };
959 /* This structure is used to assign offsets to got entries, function
960 descriptors, plt entries and lazy plt entries. */
962 struct _frvfdpic_dynamic_got_plt_info
963 {
964 /* Summary information collected with _frvfdpic_count_got_plt_entries. */
967 /* For each addressable range, we record a MAX (positive) and MIN
968 (negative) value. CUR is used to assign got entries, and it's
969 incremented from an initial positive value to MAX, then from MIN
970 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
971 assign function descriptors, and it's decreased from an initial
972 non-positive value to MIN, then from MAX down to CUR (unless CUR
973 wraps around first). All of MIN, MAX, CUR and FDCUR always point
974 to even words. ODD, if non-zero, indicates an odd word to be
975 used for the next got entry, otherwise CUR is used and
976 incremented by a pair of words, wrapping around when it reaches
977 MAX. FDCUR is decremented (and wrapped) before the next function
978 descriptor is chosen. FDPLT indicates the number of remaining
979 slots that can be used for function descriptors used only by PLT
980 entries.
982 TMAX, TMIN and TCUR are used to assign TLS descriptors. TCUR
983 starts as MAX, and grows up to TMAX, then wraps around to TMIN
984 and grows up to MIN. TLSDPLT indicates the number of remaining
985 slots that can be used for TLS descriptors used only by TLS PLT
986 entries. */
987 struct _frvfdpic_dynamic_got_alloc_data
988 {
993 };
995 /* Create an FRV ELF linker hash table. */
999 {
1008 _bfd_elf_link_hash_newfunc,
1010 {
1013 }
1016 }
1018 /* Decide whether a reference to a symbol can be resolved locally or
1019 not. If the symbol is protected, we want the local address, but
1020 its function descriptor must be assigned by the dynamic linker. */
1021 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
1022 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1023 || ! elf_hash_table (INFO)->dynamic_sections_created)
1024 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
1025 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1027 /* This structure collects information on what kind of GOT, PLT or
1028 function descriptors are required by relocations that reference a
1029 certain symbol. */
1030 struct frvfdpic_relocs_info
1031 {
1032 /* The index of the symbol, as stored in the relocation r_info, if
1033 we have a local symbol; -1 otherwise. */
1035 union
1036 {
1037 /* The input bfd in which the symbol is defined, if it's a local
1038 symbol. */
1040 /* If symndx == -1, the hash table entry corresponding to a global
1041 symbol (even if it turns out to bind locally, in which case it
1042 should ideally be replaced with section's symndx + addend). */
1045 /* The addend of the relocation that references the symbol. */
1046 bfd_vma addend;
1048 /* The fields above are used to identify an entry. The fields below
1049 contain information on how an entry is used and, later on, which
1050 locations it was assigned. */
1051 /* The following 3 fields record whether the symbol+addend above was
1052 ever referenced with a GOT relocation. The 12 suffix indicates a
1053 GOT12 relocation; los is used for GOTLO relocations that are not
1054 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1055 pairs. */
1059 /* Whether a FUNCDESC relocation references symbol+addend. */
1061 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1065 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1069 /* Whether a GETTLSOFF relocation references symbol+addend. */
1071 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1072 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1073 We might instead just pre-compute flags telling whether the
1074 object is suitable for local exec, initial exec or general
1075 dynamic addressing, and use that all over the place. We could
1076 also try to do a better job of merging TLSOFF and TLSDESC entries
1077 in main executables, but perhaps we can get rid of TLSDESC
1078 entirely in them instead. */
1079 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1083 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1087 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1088 GOTOFFHI relocations. The addend doesn't really matter, since we
1089 envision that this will only be used to check whether the symbol
1090 is mapped to the same segment as the got. */
1092 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1094 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1095 relocation. */
1097 /* Whether we need a PLT entry for a symbol. Should be implied by
1098 something like:
1099 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1101 /* Whether a function descriptor should be created in this link unit
1102 for symbol+addend. Should be implied by something like:
1103 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1104 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1105 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1107 /* Whether a lazy PLT entry is needed for this symbol+addend.
1108 Should be implied by something like:
1109 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1110 && ! (info->flags & DF_BIND_NOW)) */
1112 /* Whether we've already emitted GOT relocations and PLT entries as
1113 needed for this symbol. */
1116 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1117 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1118 symbol+addend. */
1121 /* The number of .rofixups entries and dynamic relocations allocated
1122 for this symbol, minus any that might have already been used. */
1125 /* The offsets of the GOT entries assigned to symbol+addend, to the
1126 function descriptor's address, and to a function descriptor,
1127 respectively. Should be zero if unassigned. The offsets are
1128 counted from the value that will be assigned to the PIC register,
1129 not from the beginning of the .got section. */
1131 /* The offsets of the PLT entries assigned to symbol+addend,
1132 non-lazy and lazy, respectively. If unassigned, should be
1133 (bfd_vma)-1. */
1135 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1137 /* The offset of the TLS offset PLT entry. */
1138 bfd_vma tlsplt_entry;
1139 };
1141 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1142 static hashval_t
1144 {
1150 }
1152 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1153 identical. */
1154 static int
1156 {
1162 }
1164 /* Find or create an entry in a hash table HT that matches the key
1165 fields of the given ENTRY. If it's not found, memory for a new
1166 entry is allocated in ABFD's obstack. */
1172 {
1195 }
1197 /* Obtain the address of the entry in HT associated with H's symbol +
1198 addend, creating a new entry if none existed. ABFD is only used
1199 for memory allocation purposes. */
1204 bfd_vma addend,
1206 {
1214 }
1216 /* Obtain the address of the entry in HT associated with the SYMNDXth
1217 local symbol of the input bfd ABFD, plus the addend, creating a new
1218 entry if none existed. */
1223 bfd_vma addend,
1225 {
1233 }
1235 /* Merge fields set by check_relocs() of two entries that end up being
1236 mapped to the same (presumably global) symbol. */
1241 {
1262 }
1264 /* Every block of 65535 lazy PLT entries shares a single call to the
1265 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1266 32767, counting from 0). All other lazy PLT entries branch to it
1267 in a single instruction. */
1269 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1270 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1272 /* Add a dynamic relocation to the SRELOC section. */
1278 {
1279 Elf_Internal_Rela outrel;
1280 bfd_vma reloc_offset;
1292 /* If the entry's index is zero, this relocation was probably to a
1293 linkonce section that got discarded. We reserved a dynamic
1294 relocation, but it was for another entry than the one we got at
1295 the time of emitting the relocation. Unfortunately there's no
1296 simple way for us to catch this situation, since the relocation
1297 is cleared right before calling relocate_section, at which point
1298 we no longer know what the relocation used to point to. */
1300 {
1303 }
1306 }
1308 /* Add a fixup to the ROFIXUP section. */
1310 static bfd_vma
1313 {
1314 bfd_vma fixup_offset;
1321 {
1324 }
1328 {
1329 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1330 above. */
1333 }
1336 }
1338 /* Find the segment number in which OSEC, and output section, is
1339 located. */
1341 static unsigned
1343 {
1347 /* Find the segment that contains the output_section. */
1352 {
1361 }
1364 }
1368 {
1372 }
1374 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1376 /* Return the base VMA address which should be subtracted from real addresses
1377 when resolving TLSMOFF relocation.
1378 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1380 static bfd_vma
1382 {
1383 /* If tls_sec is NULL, we should have signalled an error already. */
1387 }
1389 /* Generate relocations for GOT entries, function descriptors, and
1390 code for PLT and lazy PLT entries. */
1398 bfd_vma addend)
1400 {
1410 {
1411 /* If the symbol is dynamic, consider it for dynamic
1412 relocations, otherwise decay to section + offset. */
1415 else
1416 {
1421 else
1423 }
1424 }
1426 /* Generate relocation for GOT entry pointing to the symbol. */
1428 {
1432 /* If the symbol is dynamic but binds locally, use
1433 section+offset. */
1436 {
1439 else
1444 else
1446 }
1448 /* If we're linking an executable at a fixed address, we can
1449 omit the dynamic relocation as long as the symbol is local to
1450 this module. */
1454 {
1462 ->vma
1466 }
1467 else
1469 _bfd_elf_section_offset
1483 }
1485 /* Generate relocation for GOT entry pointing to a canonical
1486 function descriptor. */
1488 {
1495 {
1496 /* If the symbol is dynamic and there may be dynamic symbol
1497 resolution because we are, or are linked with, a shared
1498 library, emit a FUNCDESC relocation such that the dynamic
1499 linker will allocate the function descriptor. If the
1500 symbol needs a non-local function descriptor but binds
1501 locally (e.g., its visibility is protected, emit a
1502 dynamic relocation decayed to section+offset. */
1507 {
1513 }
1516 {
1521 {
1528 }
1529 }
1530 else
1531 {
1532 /* Otherwise, we know we have a private function descriptor,
1533 so reference it directly. */
1541 }
1543 /* If there is room for dynamic symbol resolution, emit the
1544 dynamic relocation. However, if we're linking an
1545 executable at a fixed location, we won't have emitted a
1546 dynamic symbol entry for the got section, so idx will be
1547 zero, which means we can and should compute the address
1548 of the private descriptor ourselves. */
1552 {
1559 ->output_offset
1562 }
1563 else
1566 _bfd_elf_section_offset
1576 }
1582 }
1584 /* Generate relocation to fill in a private function descriptor in
1585 the GOT. */
1587 {
1590 bfd_vma ofst;
1593 /* If the symbol is dynamic but binds locally, use
1594 section+offset. */
1597 {
1600 else
1605 else
1607 }
1609 /* If we're linking an executable at a fixed address, we can
1610 omit the dynamic relocation as long as the symbol is local to
1611 this module. */
1614 {
1620 {
1626 ->output_offset
1634 ->output_offset
1637 }
1638 }
1639 else
1640 {
1641 ofst =
1643 entry->lazyplt
1646 _bfd_elf_section_offset
1656 }
1658 /* If we've omitted the dynamic relocation, just emit the fixed
1659 addresses of the symbol and of the local GOT base offset. */
1661 {
1666 }
1668 {
1670 {
1677 }
1681 /* A function descriptor used for lazy or local resolving is
1682 initialized such that its high word contains the output
1683 section index in which the PLT entries are located, and
1684 the low word contains the address of the lazy PLT entry
1685 entry point, that must be within the memory region
1686 assigned to that section. */
1690 highword = _frvfdpic_osec_to_segment
1692 }
1693 else
1694 {
1695 /* A function descriptor for a local function gets the index
1696 of the section. For a non-local function, it's
1697 disregarded. */
1702 else
1703 highword = _frvfdpic_osec_to_segment
1705 }
1715 }
1717 /* Generate code for the PLT entry. */
1719 {
1725 /* Figure out what kind of PLT entry we need, depending on the
1726 location of the function descriptor within the GOT. */
1729 {
1730 /* lddi @(gr15, fd_entry), gr14 */
1733 plt_code);
1735 }
1736 else
1737 {
1740 {
1741 /* setlos lo(fd_entry), gr14 */
1743 0x9cfc0000
1745 plt_code);
1747 }
1748 else
1749 {
1750 /* sethi.p hi(fd_entry), gr14
1751 setlo lo(fd_entry), gr14 */
1753 0x1cf80000
1756 plt_code);
1759 0x9cf40000
1761 plt_code);
1763 }
1764 /* ldd @(gr14,gr15),gr14 */
1767 }
1768 /* jmpl @(gr14,gr0) */
1770 }
1772 /* Generate code for the lazy PLT entry. */
1774 {
1777 bfd_vma resolverStub_addr;
1788 {
1789 /* This is a lazy PLT entry that includes a resolver call. */
1790 /* ldd @(gr15,gr0), gr4
1791 jmpl @(gr4,gr0) */
1794 }
1795 else
1796 {
1797 /* bra resolverStub */
1799 0xc01a0000
1802 lzplt_code);
1803 }
1804 }
1806 /* Generate relocation for GOT entry holding the TLS offset. */
1808 {
1814 {
1815 /* If the symbol is dynamic but binds locally, use
1816 section+offset. */
1818 {
1821 else
1827 else
1829 }
1830 }
1832 /* *ABS*+addend is special for TLS relocations, use only the
1833 addend. */
1838 ;
1839 /* If we're linking an executable, we can entirely omit the
1840 dynamic relocation if the symbol is local to this module. */
1844 {
1847 }
1848 else
1849 {
1853 {
1855 {
1860 }
1863 }
1865 _bfd_elf_section_offset
1875 }
1881 }
1884 {
1888 /* If the symbol is dynamic but binds locally, use
1889 section+offset. */
1892 {
1895 else
1900 else
1902 }
1904 /* If we didn't set up a TLS offset entry, but we're linking an
1905 executable and the symbol binds locally, we can use the
1906 module offset in the TLS descriptor in relaxations. */
1916 {
1917 /* *ABS*+addend is special for TLS relocations, use only the
1918 addend for the TLS offset, and take the module id as
1919 0. */
1923 ;
1924 /* For other TLS symbols that bind locally, add the section
1925 TLS offset to the addend. */
1942 ->output_offset
1948 /* We've used one of the reserved fixups, so discount it so
1949 that we can check at the end that we've used them
1950 all. */
1953 /* While at that, make sure the ret instruction makes to the
1954 right location in the PLT. We could do it only when we
1955 got to 0, but since the check at the end will only print
1956 a warning, make sure we have the ret in place in case the
1957 warning is missed. */
1961 }
1962 else
1963 {
1967 {
1969 {
1974 }
1977 }
1980 _bfd_elf_section_offset
1995 }
2001 }
2003 /* Generate code for the get-TLS-offset PLT entry. */
2005 {
2012 {
2016 /* sec may be NULL when referencing an undefweak symbol
2017 while linking a static executable. */
2019 {
2022 }
2023 else
2024 {
2027 else
2033 else
2035 }
2037 /* *ABS*+addend is special for TLS relocations, use only the
2038 addend for the TLS offset, and take the module id as
2039 0. */
2043 ;
2044 /* For other TLS symbols that bind locally, add the section
2045 TLS offset to the addend. */
2051 {
2052 /* setlos lo(ad), gr9 */
2054 0x92fc0000
2055 | (ad
2057 plt_code);
2059 }
2060 else
2061 {
2062 /* sethi.p hi(ad), gr9
2063 setlo lo(ad), gr9 */
2065 0x12f80000
2068 plt_code);
2071 0x92f40000
2072 | (ad
2074 plt_code);
2076 }
2077 /* ret */
2079 }
2081 {
2082 /* Figure out what kind of PLT entry we need, depending on the
2083 location of the TLS descriptor within the GOT. */
2086 {
2087 /* ldi @(gr15, tlsoff_entry), gr9 */
2091 plt_code);
2093 }
2094 else
2095 {
2098 {
2099 /* setlos lo(tlsoff_entry), gr8 */
2101 0x90fc0000
2104 plt_code);
2106 }
2107 else
2108 {
2109 /* sethi.p hi(tlsoff_entry), gr8
2110 setlo lo(tlsoff_entry), gr8 */
2112 0x10f80000
2115 plt_code);
2118 0x90f40000
2121 plt_code);
2123 }
2124 /* ld @(gr15,gr8),gr9 */
2127 }
2128 /* ret */
2130 }
2131 else
2132 {
2135 /* Figure out what kind of PLT entry we need, depending on the
2136 location of the TLS descriptor within the GOT. */
2139 {
2140 /* lddi @(gr15, tlsdesc_entry), gr8 */
2144 plt_code);
2146 }
2147 else
2148 {
2151 {
2152 /* setlos lo(tlsdesc_entry), gr8 */
2154 0x90fc0000
2157 plt_code);
2159 }
2160 else
2161 {
2162 /* sethi.p hi(tlsdesc_entry), gr8
2163 setlo lo(tlsdesc_entry), gr8 */
2165 0x10f80000
2168 plt_code);
2171 0x90f40000
2174 plt_code);
2176 }
2177 /* ldd @(gr15,gr8),gr8 */
2180 }
2181 /* jmpl @(gr8,gr0) */
2183 }
2184 }
2187 }
2189 /* Handle an FRV small data reloc. */
2191 static bfd_reloc_status_type
2199 bfd_vma value;
2200 {
2201 bfd_vma insn;
2202 bfd_vma gp;
2226 }
2228 /* Handle an FRV small data reloc. for the u12 field. */
2230 static bfd_reloc_status_type
2238 bfd_vma value;
2239 {
2240 bfd_vma insn;
2241 bfd_vma gp;
2243 bfd_vma mask;
2261 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2268 }
2270 /* Handle an FRV ELF HI16 reloc. */
2272 static bfd_reloc_status_type
2277 bfd_vma value;
2278 {
2279 bfd_vma insn;
2294 }
2295 static bfd_reloc_status_type
2300 bfd_vma value;
2301 {
2302 bfd_vma insn;
2316 }
2318 /* Perform the relocation for the CALL label24 instruction. */
2320 static bfd_reloc_status_type
2326 bfd_vma value;
2327 {
2328 bfd_vma insn;
2329 bfd_vma label6;
2330 bfd_vma label18;
2332 /* The format for the call instruction is:
2334 0 000000 0001111 000000000000000000
2335 label6 opcode label18
2337 The branch calculation is: pc + (4*label24)
2338 where label24 is the concatenation of label6 and label18. */
2340 /* Grab the instruction. */
2361 }
2363 static bfd_reloc_status_type
2371 bfd_vma value;
2372 {
2373 bfd_vma insn;
2374 bfd_vma gp;
2396 }
2398 static bfd_reloc_status_type
2406 bfd_vma value;
2407 {
2408 bfd_vma insn;
2409 bfd_vma gp;
2432 }
2437 bfd_reloc_code_real_type code;
2438 {
2440 {
2451 /* Fall through. */
2589 }
2592 }
2596 {
2601 i++)
2612 }
2614 /* Set the howto pointer for an FRV ELF reloc. */
2616 static void
2621 {
2626 {
2638 }
2639 }
2641 /* Set the howto pointer for an FRV ELF REL reloc. */
2642 static void
2645 {
2650 {
2674 }
2675 }
2676 \f
2677 /* Perform a single relocation. By default we use the standard BFD
2678 routines, but a few relocs, we have to do them ourselves. */
2680 static bfd_reloc_status_type
2682 relocation)
2688 bfd_vma relocation;
2689 {
2693 }
2695 \f
2696 /* Relocate an FRV ELF section.
2698 The RELOCATE_SECTION function is called by the new ELF backend linker
2699 to handle the relocations for a section.
2701 The relocs are always passed as Rela structures; if the section
2702 actually uses Rel structures, the r_addend field will always be
2703 zero.
2705 This function is responsible for adjusting the section contents as
2706 necessary, and (if using Rela relocs and generating a relocatable
2707 output file) adjusting the reloc addend as necessary.
2709 This function does not have to worry about setting the reloc
2710 address or the reloc symbol index.
2712 LOCAL_SYMS is a pointer to the swapped in local symbols.
2714 LOCAL_SECTIONS is an array giving the section in the input file
2715 corresponding to the st_shndx field of each local symbol.
2717 The global hash table entry for the global symbols can be found
2718 via elf_sym_hashes (input_bfd).
2720 When generating relocatable output, this function must handle
2721 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2722 going to be the section symbol corresponding to the output
2723 section, which means that the addend must be adjusted
2724 accordingly. */
2726 static bfd_boolean
2737 {
2757 else
2763 else
2769 else
2774 else
2778 {
2784 bfd_vma relocation;
2785 bfd_reloc_status_type r;
2805 {
2810 name = bfd_elf_string_from_elf_section
2813 }
2814 else
2815 {
2816 bfd_boolean warned;
2817 bfd_boolean unresolved_reloc;
2824 }
2827 {
2828 /* For relocs against symbols from removed linkonce sections,
2829 or sections discarded by a linker script, we just want the
2830 section contents zeroed. Avoid any special processing. */
2835 }
2845 {
2848 }
2851 {
2891 else
2892 /* In order to find the entry we created before, we must
2893 use the original addend, not the one that may have been
2894 modified by _bfd_elf_rela_local_sym(). */
2904 {
2909 }
2914 non_fdpic:
2917 {
2922 }
2924 }
2927 {
2950 }
2952 /* Try to apply TLS relaxations. */
2955 {
2957 #define LOCAL_EXEC_P(info, picrel) \
2958 ((info)->executable \
2959 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2960 #define INITIAL_EXEC_P(info, picrel) \
2961 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2962 && (picrel)->tlsoff_entry)
2964 #define IN_RANGE_FOR_OFST12_P(value) \
2965 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2966 #define IN_RANGE_FOR_SETLOS_P(value) \
2967 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2968 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2969 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2971 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2972 (LOCAL_EXEC_P ((info), (picrel)) \
2973 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2974 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2975 (INITIAL_EXEC_P ((info), (picrel)) \
2976 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2978 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2979 (LOCAL_EXEC_P ((info), (picrel)))
2980 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2981 (INITIAL_EXEC_P ((info), (picrel)))
2983 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2984 (LOCAL_EXEC_P ((info), (picrel)) \
2985 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2990 /* Is this a call instruction? */
2992 {
2998 }
3002 {
3003 /* Replace the call instruction (except the packing bit)
3004 with setlos #tlsmofflo(symbol+offset), gr9. */
3012 }
3015 {
3016 /* Replace the call instruction (except the packing bit)
3017 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
3025 }
3032 /* Is this an lddi instruction? */
3034 {
3040 }
3045 info))
3046 {
3047 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3048 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3049 Preserve the packing bit. */
3059 }
3063 {
3064 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3065 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3066 Preserve the packing bit. */
3076 }
3079 {
3080 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3081 with ldi @(grB, #gottlsoff12(symbol+offset),
3082 gr<C+1>. Preserve the packing bit. If gottlsoff12
3083 overflows, we'll error out, but that's sort-of ok,
3084 since we'd started with gottlsdesc12, that's actually
3085 more demanding. Compiling with -fPIE instead of
3086 -fpie would fix it; linking with --relax should fix
3087 it as well. */
3096 }
3103 /* Is this a sethi instruction? */
3105 {
3111 }
3117 {
3118 /* Replace sethi with a nop. Preserve the packing bit. */
3123 /* Nothing to relocate. */
3125 }
3128 {
3129 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3133 }
3140 /* Is this a setlo or setlos instruction? */
3142 {
3149 }
3155 {
3156 /* Replace setlo/setlos with a nop. Preserve the
3157 packing bit. */
3162 /* Nothing to relocate. */
3164 }
3167 {
3168 /* If the corresponding sethi (if it exists) decayed
3169 to a nop, make sure this becomes (or already is) a
3170 setlos, not setlo. */
3172 {
3175 }
3177 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3181 }
3188 /* Is this an ldd instruction? */
3190 {
3196 }
3201 info))
3202 {
3203 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3204 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3205 Preserve the packing bit. */
3215 }
3219 {
3220 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3221 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3222 Preserve the packing bit. */
3232 }
3236 {
3237 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3238 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3239 Preserve the packing bit. */
3249 }
3252 {
3253 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3254 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3255 Preserve the packing bit. */
3261 /* #tlsoff(symbol+offset) is just a relaxation
3262 annotation, so there's nothing left to
3263 relocate. */
3265 }
3272 /* Is this a calll or callil instruction? */
3274 {
3281 }
3286 info))
3287 {
3288 /* Replace calll with a nop. Preserve the packing bit. */
3293 /* Nothing to relocate. */
3295 }
3299 {
3300 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3301 Preserve the packing bit. */
3309 }
3312 {
3313 /* Replace calll with a nop. Preserve the packing bit. */
3318 /* Nothing to relocate. */
3320 }
3327 /* Is this an ldi instruction? */
3329 {
3335 }
3339 {
3340 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3341 with setlos #tlsmofflo(symbol+offset), grC.
3342 Preserve the packing bit. */
3350 }
3357 /* Is this a sethi instruction? */
3359 {
3365 }
3371 {
3372 /* Replace sethi with a nop. Preserve the packing bit. */
3377 /* Nothing to relocate. */
3379 }
3386 /* Is this a setlo or setlos instruction? */
3388 {
3395 }
3401 {
3402 /* Replace setlo/setlos with a nop. Preserve the
3403 packing bit. */
3408 /* Nothing to relocate. */
3410 }
3417 /* Is this an ld instruction? */
3419 {
3425 }
3429 {
3430 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3431 with setlos #tlsmofflo(symbol+offset), grC.
3432 Preserve the packing bit. */
3440 }
3444 {
3445 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3446 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3447 Preserve the packing bit. */
3455 }
3462 /* Is this a sethi instruction? */
3464 {
3470 }
3473 info))
3474 {
3475 /* Replace sethi with a nop. Preserve the packing bit. */
3480 /* Nothing to relocate. */
3482 }
3489 /* Is this a setlo or setlos instruction? */
3491 {
3498 }
3501 info))
3502 /* If the corresponding sethi (if it exists) decayed
3503 to a nop, make sure this becomes (or already is) a
3504 setlos, not setlo. */
3505 {
3508 }
3512 /*
3513 There's nothing to relax in these:
3514 R_FRV_TLSDESC_VALUE
3515 R_FRV_TLSOFF
3516 R_FRV_TLSMOFF12
3517 R_FRV_TLSMOFFHI
3518 R_FRV_TLSMOFFLO
3519 R_FRV_TLSMOFF
3520 */
3524 }
3527 {
3533 {
3538 }
3539 /* We don't want to warn on calls to undefined weak symbols,
3540 as calls to them must be protected by non-NULL tests
3541 anyway, and unprotected calls would invoke undefined
3542 behavior. */
3546 else
3586 {
3592 {
3593 /* If the symbol is dynamic and there may be dynamic
3594 symbol resolution because we are or are linked with a
3595 shared library, emit a FUNCDESC relocation such that
3596 the dynamic linker will allocate the function
3597 descriptor. If the symbol needs a non-local function
3598 descriptor but binds locally (e.g., its visibility is
3599 protected, emit a dynamic relocation decayed to
3600 section+offset. */
3604 {
3609 }
3611 {
3613 {
3618 }
3620 }
3621 else
3622 {
3623 /* Otherwise, we know we have a private function
3624 descriptor, so reference it directly. */
3632 }
3634 /* If there is room for dynamic symbol resolution, emit
3635 the dynamic relocation. However, if we're linking an
3636 executable at a fixed location, we won't have emitted a
3637 dynamic symbol entry for the got section, so idx will
3638 be zero, which means we can and should compute the
3639 address of the private descriptor ourselves. */
3642 {
3647 {
3648 bfd_vma offset;
3651 input_section
3653 {
3659 }
3661 offset = _bfd_elf_section_offset
3667 frvfdpic_gotfixup_section
3669 offset + input_section
3672 picrel);
3673 }
3674 }
3678 {
3679 bfd_vma offset;
3682 input_section
3684 {
3690 }
3692 offset = _bfd_elf_section_offset
3699 offset + input_section
3703 }
3704 else
3706 }
3708 /* We want the addend in-place because dynamic
3709 relocations are REL. Setting relocation to it should
3710 arrange for it to be installed. */
3712 }
3718 {
3721 }
3722 /* Fall through. */
3724 {
3728 /* If the symbol is dynamic but binds locally, use
3729 section+offset. */
3731 {
3733 {
3738 }
3740 }
3741 else
3742 {
3745 else
3753 else
3755 }
3757 /* If we're linking an executable at a fixed address, we
3758 can omit the dynamic relocation as long as the symbol
3759 is defined in the current link unit (which is implied
3760 by its output section not being NULL). */
3763 {
3770 {
3772 input_section
3774 {
3780 }
3782 {
3783 bfd_vma offset = _bfd_elf_section_offset
3788 {
3790 frvfdpic_gotfixup_section
3792 offset + input_section
3795 picrel);
3797 _frvfdpic_add_rofixup
3800 offset
3803 }
3804 }
3805 }
3806 }
3807 else
3808 {
3812 {
3813 bfd_vma offset;
3816 input_section
3818 {
3824 }
3826 offset = _bfd_elf_section_offset
3833 offset + input_section
3837 }
3840 /* We want the addend in-place because dynamic
3841 relocations are REL. Setting relocation to it
3842 should arrange for it to be installed. */
3844 }
3847 {
3848 /* If we've omitted the dynamic relocation, just emit
3849 the fixed addresses of the symbol and of the local
3850 GOT base offset. */
3858 else
3859 /* A function descriptor used for lazy or local
3860 resolving is initialized such that its high word
3861 contains the output section index in which the
3862 PLT entries are located, and the low word
3863 contains the offset of the lazy PLT entry entry
3864 point into that section. */
3869 sec
3872 }
3873 }
3920 {
3923 }
3925 {
3929 }
3930 else
3949 /* These shouldn't be present in input object files. */
3956 /* These are just annotations for relaxation, nothing to do
3957 here. */
3966 }
3969 {
3970 /* If you take this out, remove the #error from fdpic-static-6.d
3971 in the ld testsuite. */
3972 /* This helps catch problems in GCC while we can't do more
3973 than static linking. The idea is to test whether the
3974 input file basename is crt0.o only once. */
3976 silence_segment_error =
3985 /* We don't want duplicate errors for undefined
3986 symbols. */
3989 {
3995 else
4000 }
4004 }
4007 {
4010 /* We need the addend to be applied before we shift the
4011 value right. */
4013 /* Fall through. */
4020 /* Fall through. */
4034 }
4037 {
4041 /* Fall through. */
4043 /* When referencing a GOT entry, a function descriptor or a
4044 PLT, we don't want the addend to apply to the reference,
4045 but rather to the referenced symbol. The actual entry
4046 will have already been created taking the addend into
4047 account, so cancel it out here. */
4064 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
4065 here, since we do want to apply the addend to the others.
4066 Note that we've applied the addend to GOTOFFHI before we
4067 shifted it right. */
4075 }
4107 else
4112 {
4116 {
4143 }
4146 {
4151 }
4155 }
4156 }
4159 }
4160 \f
4161 /* Return the section that should be marked against GC for a given
4162 relocation. */
4170 {
4173 {
4177 }
4180 }
4181 \f
4182 /* Hook called by the linker routine which adds symbols from an object
4183 file. We use it to put .comm items in .scomm, and not .comm. */
4185 static bfd_boolean
4194 {
4198 {
4199 /* Common symbols less than or equal to -G nn bytes are
4200 automatically put into .sbss. */
4205 {
4207 (SEC_ALLOC
4208 | SEC_IS_COMMON
4212 }
4216 }
4219 }
4221 /* We need dynamic symbols for every section, since segments can
4222 relocate independently. */
4223 static bfd_boolean
4226 ATTRIBUTE_UNUSED,
4228 {
4230 {
4233 /* If sh_type is yet undecided, assume it could be
4234 SHT_PROGBITS/SHT_NOBITS. */
4238 /* There shouldn't be section relative relocations
4239 against any other section. */
4242 }
4243 }
4245 /* Create a .got section, as well as its additional info field. This
4246 is almost entirely copied from
4247 elflink.c:_bfd_elf_create_got_section(). */
4249 static bfd_boolean
4251 {
4260 /* This function may be called more than once. */
4265 /* Machine specific: although pointers are 32-bits wide, we want the
4266 GOT to be aligned to a 64-bit boundary, such that function
4267 descriptors in it can be accessed with 64-bit loads and
4268 stores. */
4281 {
4286 }
4289 {
4290 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4291 (or .got.plt) section. We don't do this in the linker script
4292 because we don't want to define the symbol if we are not creating
4293 a global offset table. */
4299 /* Machine-specific: we want the symbol for executables as
4300 well. */
4303 }
4305 /* The first bit of the global offset table is the header. */
4308 /* This is the machine-specific part. Create and initialize section
4309 data for the got. */
4311 {
4314 frvfdpic_relocs_info_hash,
4315 frvfdpic_relocs_info_eq,
4328 /* Machine-specific. */
4338 }
4339 else
4340 {
4343 }
4345 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4346 turns out that we're linking with a different linker script, the
4347 linker script will override it. */
4358 /* Machine-specific: we want the symbol for executables as well. */
4365 /* FDPIC supports Thread Local Storage, and this may require a
4366 procedure linkage table for TLS PLT entries. */
4368 /* This is mostly copied from
4369 elflink.c:_bfd_elf_create_dynamic_sections(). */
4382 /* FRV-specific: remember it. */
4385 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4386 .plt section. */
4388 {
4394 }
4396 /* FRV-specific: we want rel relocations for the plt. */
4402 /* FRV-specific: remember it. */
4406 }
4408 /* Make sure the got and plt sections exist, and that our pointers in
4409 the link hash table point to them. */
4411 static bfd_boolean
4413 {
4414 /* This is mostly copied from
4415 elflink.c:_bfd_elf_create_dynamic_sections(). */
4416 flagword flags;
4423 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4424 .rel[a].bss sections. */
4426 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4427 way. */
4431 /* FRV-specific: make sure we created everything we wanted. */
4438 {
4439 /* The .dynbss section is a place to put symbols which are defined
4440 by dynamic objects, are referenced by regular objects, and are
4441 not functions. We must allocate space for them in the process
4442 image and use a R_*_COPY reloc to tell the dynamic linker to
4443 initialize them at run time. The linker script puts the .dynbss
4444 section into the .bss section of the final image. */
4450 /* The .rel[a].bss section holds copy relocs. This section is not
4451 normally needed. We need to create it here, though, so that the
4452 linker will map it to an output section. We can't just create it
4453 only if we need it, because we will not know whether we need it
4454 until we have seen all the input files, and the first time the
4455 main linker code calls BFD after examining all the input files
4456 (size_dynamic_sections) the input sections have already been
4457 mapped to the output sections. If the section turns out not to
4458 be needed, we can discard it later. We will never need this
4459 section when generating a shared object, since they do not use
4460 copy relocs. */
4462 {
4470 }
4471 }
4474 }
4476 /* Compute the total GOT and PLT size required by each symbol in each
4477 range. Symbols may require up to 4 words in the GOT: an entry
4478 pointing to the symbol, an entry pointing to its function
4479 descriptor, and a private function descriptors taking two
4480 words. */
4482 static void
4485 {
4486 /* Allocate space for a GOT entry pointing to the symbol. */
4493 else
4497 /* Allocate space for a GOT entry pointing to the function
4498 descriptor. */
4505 else
4509 /* Decide whether we need a PLT entry, a function descriptor in the
4510 GOT, and a lazy PLT entry for this symbol. */
4524 /* Allocate space for a function descriptor. */
4533 else
4539 }
4541 /* Compute the total GOT size required by each TLS symbol in each
4542 range. Symbols may require up to 5 words in the GOT: an entry
4543 holding the TLS offset for the symbol, and an entry with a full TLS
4544 descriptor taking 4 words. */
4546 static void
4549 bfd_boolean subtract)
4550 {
4553 /* Allocate space for a GOT entry with the TLS offset of the
4554 symbol. */
4561 else
4565 /* If there's any TLSOFF relocation, mark the output file as not
4566 suitable for dlopening. This mark will remain even if we relax
4567 all such relocations, but this is not a problem, since we'll only
4568 do so for executables, and we definitely don't want anyone
4569 dlopening executables. */
4573 /* Allocate space for a TLS descriptor. */
4582 else
4585 }
4587 /* Compute the number of dynamic relocations and fixups that a symbol
4588 requires, and add (or subtract) from the grand and per-symbol
4589 totals. */
4591 static void
4594 bfd_boolean subtract)
4595 {
4599 {
4603 /* In the executable, TLS relocations to symbols that bind
4604 locally (including those that resolve to global TLS offsets)
4605 are resolved immediately, without any need for fixups or
4606 dynamic relocations. In shared libraries, however, we must
4607 emit dynamic relocations even for local symbols, because we
4608 don't know the module id the library is going to get at
4609 run-time, nor its TLS base offset. */
4614 }
4615 else
4616 {
4618 {
4624 }
4625 else
4626 {
4629 }
4633 {
4637 }
4638 else
4640 }
4643 {
4647 }
4654 }
4656 /* Look for opportunities to relax TLS relocations. We can assume
4657 we're linking the main executable or a static-tls library, since
4658 otherwise we wouldn't have got here. When relaxing, we have to
4659 first undo any previous accounting of TLS uses of fixups, dynamic
4660 relocations, GOT and PLT entries. */
4662 static void
4665 bfd_boolean relaxing)
4666 {
4673 {
4675 {
4679 }
4681 /* When linking an executable, we can always decay GOTTLSDESC to
4682 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4683 When linking a static-tls shared library, using TLSMOFF is
4684 not an option, but we can still use GOTTLSOFF. When decaying
4685 to GOTTLSOFF, we must keep the GOT entry in range. We know
4686 it has to fit because we'll be trading the 4 words of hte TLS
4687 descriptor for a single word in the same range. */
4691 {
4695 }
4698 }
4700 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4701 main executable. We have to check whether the symbol's TLSOFF is
4702 in range for a setlos. For symbols with a hash entry, we can
4703 determine exactly what to do; for others locals, we don't have
4704 addresses handy, so we use the size of the TLS section as an
4705 approximation. If we get it wrong, we'll retain a GOT entry
4706 holding the TLS offset (without dynamic relocations or fixups),
4707 but we'll still optimize away the loads from it. Since TLS sizes
4708 are generally very small, it's probably not worth attempting to
4709 do better than this. */
4715 /* The above may hold for an undefweak TLS symbol, so make
4716 sure we don't have this case before accessing def.value
4717 and def.section. */
4729 {
4731 {
4735 }
4739 }
4741 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4742 have a #gottlsoff12 relocation for this entry, or if we can fit
4743 one more in the 12-bit (and 16-bit) ranges. */
4746 || (relaxing
4751 {
4753 {
4757 }
4761 }
4764 {
4767 }
4770 }
4772 /* Compute the total GOT and PLT size required by each symbol in each range. *
4773 Symbols may require up to 4 words in the GOT: an entry pointing to
4774 the symbol, an entry pointing to its function descriptor, and a
4775 private function descriptors taking two words. */
4777 static int
4779 {
4787 else
4788 {
4791 }
4794 }
4796 /* Determine the positive and negative ranges to be used by each
4797 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4798 double-word boundary, are the minimum (negative) and maximum
4799 (positive) GOT offsets already used by previous ranges, except for
4800 an ODD entry that may have been left behind. GOT and FD indicate
4801 the size of GOT entries and function descriptors that must be
4802 placed within the range from -WRAP to WRAP. If there's room left,
4803 up to FDPLT bytes should be reserved for additional function
4804 descriptors. */
4808 bfd_signed_vma fdcur,
4809 bfd_signed_vma odd,
4810 bfd_signed_vma cur,
4811 bfd_vma got,
4812 bfd_vma fd,
4813 bfd_vma fdplt,
4814 bfd_vma tlsd,
4815 bfd_vma tlsdplt,
4816 bfd_vma wrap)
4817 {
4821 /* Start at the given initial points. */
4825 /* If we had an incoming odd word and we have any got entries that
4826 are going to use it, consume it, otherwise leave gad->odd at
4827 zero. We might force gad->odd to zero and return the incoming
4828 odd such that it is used by the next range, but then GOT entries
4829 might appear to be out of order and we wouldn't be able to
4830 shorten the GOT by one word if it turns out to end with an
4831 unpaired GOT entry. */
4833 {
4837 }
4838 else
4841 /* If we're left with an unpaired GOT entry, compute its location
4842 such that we can return it. Otherwise, if got doesn't require an
4843 odd number of words here, either odd was already zero in the
4844 block above, or it was set to zero because got was non-zero, or
4845 got was already zero. In the latter case, we want the value of
4846 odd to carry over to the return statement, so we don't want to
4847 reset odd unless the condition below is true. */
4849 {
4852 }
4854 /* Compute the tentative boundaries of this range. */
4859 /* If function descriptors took too much space, wrap some of them
4860 around. */
4862 {
4865 }
4867 /* If GOT entries took too much space, wrap some of them around.
4868 This may well cause gad->min to become lower than wrapmin. This
4869 will cause a relocation overflow later on, so we don't have to
4870 report it here . */
4872 {
4875 }
4877 /* Add TLS descriptors. */
4882 /* If TLS descriptors took too much space, wrap an integral number
4883 of them around. */
4885 {
4893 }
4895 /* If there is space left and we have function descriptors
4896 referenced in PLT entries that could take advantage of shorter
4897 offsets, place them now. */
4899 {
4900 bfd_vma fds;
4904 else
4911 }
4913 /* If there is more space left, try to place some more function
4914 descriptors for PLT entries. */
4916 {
4917 bfd_vma fds;
4921 else
4928 }
4930 /* If there is space left and we have TLS descriptors referenced in
4931 PLT entries that could take advantage of shorter offsets, place
4932 them now. */
4934 {
4935 bfd_vma tlsds;
4939 else
4945 }
4947 /* If there is more space left, try to place some more TLS
4948 descriptors for PLT entries. Although we could try to fit an
4949 additional TLS descriptor with half of it just before before the
4950 wrap point and another right past the wrap point, this might
4951 cause us to run out of space for the next region, so don't do
4952 it. */
4954 {
4955 bfd_vma tlsds;
4959 else
4965 }
4967 /* If odd was initially computed as an offset past the wrap point,
4968 wrap it around. */
4972 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4973 before returning, so do it here too. This guarantees that,
4974 should cur and fdcur meet at the wrap point, they'll both be
4975 equal to min. */
4979 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4985 }
4987 /* Compute the location of the next GOT entry, given the allocation
4988 data for a range. */
4992 {
4993 bfd_signed_vma ret;
4996 {
4997 /* If there was an odd word left behind, use it. */
5000 }
5001 else
5002 {
5003 /* Otherwise, use the word pointed to by cur, reserve the next
5004 as an odd word, and skip to the next pair of words, possibly
5005 wrapping around. */
5011 }
5014 }
5016 /* Compute the location of the next function descriptor entry in the
5017 GOT, given the allocation data for a range. */
5021 {
5022 /* If we're at the bottom, wrap around, and only then allocate the
5023 next pair of words. */
5027 }
5029 /* Compute the location of the next TLS descriptor entry in the GOT,
5030 given the allocation data for a range. */
5033 {
5034 bfd_signed_vma ret;
5040 /* If we're at the top of the region, wrap around to the bottom. */
5045 }
5047 /* Assign GOT offsets for every GOT entry and function descriptor.
5048 Doing everything in a single pass is tricky. */
5050 static int
5052 {
5073 {
5076 }
5080 {
5083 }
5085 {
5088 }
5102 {
5105 }
5109 {
5112 }
5114 {
5117 }
5122 }
5124 /* Assign GOT offsets to private function descriptors used by PLT
5125 entries (or referenced by 32-bit offsets), as well as PLT entries
5126 and lazy PLT entries. */
5128 static int
5130 {
5138 {
5141 /* We use the section's raw size to mark the location of the
5142 next PLT entry. */
5145 /* Figure out the length of this PLT entry based on the
5146 addressing mode we need to reach the function descriptor. */
5154 else
5158 }
5161 {
5164 /* If this entry is the one that gets the resolver stub, account
5165 for the additional instruction. */
5169 }
5172 {
5175 entry->tlsplt_entry
5181 {
5183 /* FIXME: here we use the size of the TLS section
5184 as an upper bound for the value of the TLS
5185 symbol, because we may not know the exact value
5186 yet. If we get it wrong, we'll just waste a
5187 word in the PLT, and we should never get even
5188 close to 32 KiB of TLS anyway. */
5193 else
5195 }
5197 {
5204 else
5206 }
5207 else
5208 {
5217 else
5219 }
5222 }
5225 }
5227 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5228 _frvfdpic_assign_plt_entries. */
5230 static int
5232 {
5245 }
5247 /* Follow indirect and warning hash entries so that each got entry
5248 points to the final symbol definition. P must point to a pointer
5249 to the hash table we're traversing. Since this traversal may
5250 modify the hash table, we set this pointer to NULL to indicate
5251 we've made a potentially-destructive change to the hash table, so
5252 the traversal must be restarted. */
5253 static int
5255 {
5260 {
5272 NO_INSERT);
5275 {
5276 /* Merge the two entries. */
5280 }
5284 /* If we can't find this entry with the new bfd hash, re-insert
5285 it, and get the traversal restarted. */
5287 {
5292 /* Abort the traversal, since the whole table may have
5293 moved, and leave it up to the parent to restart the
5294 process. */
5297 }
5298 }
5301 }
5303 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5304 section and the rofixup section. Assign locations for GOT and PLT
5305 entries. */
5307 static bfd_boolean
5310 {
5311 bfd_signed_vma odd;
5320 /* Compute the total size taken by entries in the 12-bit and 16-bit
5321 ranges, to tell how many PLT function descriptors we can bring
5322 into the 12-bit range without causing the 16-bit range to
5323 overflow. */
5329 else
5332 {
5335 }
5336 else
5341 /* Determine the ranges of GOT offsets that we can use for each
5342 range of addressing modes. */
5345 odd,
5349 limit,
5351 tlslimit,
5355 odd,
5367 odd,
5380 /* Now assign (most) GOT offsets. */
5382 gpinfop);
5386 /* If an odd word is the last word of the GOT, we don't need this
5387 word to be part of the GOT. */
5393 {
5396 }
5397 /* This will be non-NULL during relaxation. The assumption is that
5398 the size of one of these sections will never grow, only shrink,
5399 so we can use the larger buffer we allocated before. */
5401 {
5407 }
5410 /* Subtract the number of lzplt entries, since those will generate
5411 relocations in the pltrel section. */
5415 else
5420 {
5426 }
5432 {
5438 }
5441 {
5448 {
5454 }
5455 }
5457 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5458 such that there's room for the additional instruction needed to
5459 call the resolver. Since _frvfdpic_assign_got_entries didn't
5460 account for them, our block size is 4 bytes smaller than the real
5461 block size. */
5463 {
5467 }
5469 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5470 actually assign lazy PLT entries addresses. */
5473 /* Save information that we're going to need to generate GOT and PLT
5474 entries. */
5485 /* Allocate a ret statement at plt_initial_offset, to be used by
5486 locally-resolved TLS descriptors. */
5491 gpinfop);
5493 /* Allocate the PLT section contents only after
5494 _frvfdpic_assign_plt_entries has a chance to add the size of the
5495 non-lazy PLT entries. */
5497 {
5501 {
5507 }
5508 }
5511 }
5513 /* Set the sizes of the dynamic sections. */
5515 static bfd_boolean
5518 {
5527 {
5528 /* Set the contents of the .interp section to the interpreter. */
5530 {
5535 }
5536 }
5542 {
5549 }
5554 /* Allocate space to save the summary information, we're going to
5555 use it if we're doing relaxations. */
5562 {
5579 }
5582 }
5584 static bfd_boolean
5587 {
5589 {
5592 /* Force a PT_GNU_STACK segment to be created. */
5596 /* Define __stacksize if it's not defined yet. */
5602 {
5615 /* This one must NOT be hidden. */
5616 }
5617 }
5620 }
5622 /* Check whether any of the relocations was optimized away, and
5623 subtract it from the relocation or fixup count. */
5624 static bfd_boolean
5629 {
5646 /* Now examine each relocation. */
5648 {
5666 else
5667 {
5672 }
5678 else
5695 }
5698 }
5700 static bfd_boolean
5704 {
5709 /* Account for relaxation of .eh_frame section. */
5712 {
5716 }
5719 {
5726 /* Clear GOT and PLT assignments. */
5728 _frvfdpic_reset_got_plt_entries,
5729 NULL);
5733 }
5736 }
5738 /* Look for opportunities to relax TLS relocations. We can assume
5739 we're linking the main executable or a static-tls library, since
5740 otherwise we wouldn't have got here. */
5742 static int
5744 {
5751 }
5753 static bfd_boolean
5756 {
5759 /* If we return early, we didn't change anything. */
5762 /* We'll do our thing when requested to relax the GOT section. */
5766 /* We can only relax when linking the main executable or a library
5767 that can't be dlopened. */
5771 /* If there isn't a TLS section for this binary, we can't do
5772 anything about its TLS relocations (it probably doesn't have
5773 any. */
5780 /* Now look for opportunities to relax, adjusting the GOT usage
5781 as needed. */
5783 _frvfdpic_relax_got_plt_entries,
5786 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5789 {
5790 /* Clear GOT and PLT assignments. */
5792 _frvfdpic_reset_got_plt_entries,
5793 NULL);
5795 /* The owner of the TLS section is the output bfd. There should
5796 be a better way to get to it. */
5801 /* Repeat until we don't make any further changes. We could fail to
5802 introduce changes in a round if, for example, the 12-bit range is
5803 full, but we later release some space by getting rid of TLS
5804 descriptors in it. We have to repeat the whole process because
5805 we might have changed the size of a section processed before this
5806 one. */
5808 }
5811 }
5813 static bfd_boolean
5816 {
5821 /* objcopy and strip preserve what's already there using
5822 elf32_frvfdpic_copy_private_bfd_data (). */
5831 {
5834 /* Obtain the pointer to the __stacksize symbol. */
5838 {
5843 }
5845 /* Set the header p_memsz from the symbol value. We
5846 intentionally ignore the symbol section. */
5849 else
5853 }
5856 }
5858 /* Fill in code and data in dynamic sections. */
5860 static bfd_boolean
5863 {
5864 /* Nothing to be done for non-FDPIC. */
5866 }
5868 static bfd_boolean
5871 {
5878 {
5880 }
5882 {
5888 {
5900 {
5901 error:
5905 }
5912 {
5913 bfd_vma value =
5922 }
5923 }
5924 }
5926 {
5930 }
5934 {
5946 {
5947 Elf_Internal_Dyn dyn;
5952 {
5974 }
5975 }
5976 }
5979 }
5981 /* Adjust a symbol defined by a dynamic object and referenced by a
5982 regular object. */
5984 static bfd_boolean
5985 elf32_frvfdpic_adjust_dynamic_symbol
5988 {
5993 /* Make sure we know what is going on here. */
6000 /* If this is a weak symbol, and there is a real definition, the
6001 processor independent code will have arranged for us to see the
6002 real definition first, and we can just use the same value. */
6004 {
6009 }
6012 }
6014 /* Perform any actions needed for dynamic symbols. */
6016 static bfd_boolean
6017 elf32_frvfdpic_finish_dynamic_symbol
6022 {
6024 }
6026 /* Decide whether to attempt to turn absptr or lsda encodings in
6027 shared libraries into pcrel within the given input section. */
6029 static bfd_boolean
6030 frvfdpic_elf_use_relative_eh_frame
6034 {
6035 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
6037 }
6039 /* Adjust the contents of an eh_frame_hdr section before they're output. */
6041 static bfd_byte
6047 {
6059 == (_frvfdpic_osec_to_segment
6068 }
6070 /* Look through the relocs for a section during the first phase.
6072 Besides handling virtual table relocs for gc, we have to deal with
6073 all sorts of PIC-related relocations. We describe below the
6074 general plan on how to handle such relocations, even though we only
6075 collect information at this point, storing them in hash tables for
6076 perusal of later passes.
6078 32 relocations are propagated to the linker output when creating
6079 position-independent output. LO16 and HI16 relocations are not
6080 supposed to be encountered in this case.
6082 LABEL16 should always be resolvable by the linker, since it's only
6083 used by branches.
6085 LABEL24, on the other hand, is used by calls. If it turns out that
6086 the target of a call is a dynamic symbol, a PLT entry must be
6087 created for it, which triggers the creation of a private function
6088 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
6090 GPREL relocations require the referenced symbol to be in the same
6091 segment as _gp, but this can only be checked later.
6093 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
6094 exist. LABEL24 might as well, since it may require a PLT entry,
6095 that will require a got.
6097 Non-FUNCDESC GOT relocations require a GOT entry to be created
6098 regardless of whether the symbol is dynamic. However, since a
6099 global symbol that turns out to not be exported may have the same
6100 address of a non-dynamic symbol, we don't assign GOT entries at
6101 this point, such that we can share them in this case. A relocation
6102 for the GOT entry always has to be created, be it to offset a
6103 private symbol by the section load address, be it to get the symbol
6104 resolved dynamically.
6106 FUNCDESC GOT relocations require a GOT entry to be created, and
6107 handled as if a FUNCDESC relocation was applied to the GOT entry in
6108 an object file.
6110 FUNCDESC relocations referencing a symbol that turns out to NOT be
6111 dynamic cause a private function descriptor to be created. The
6112 FUNCDESC relocation then decays to a 32 relocation that points at
6113 the private descriptor. If the symbol is dynamic, the FUNCDESC
6114 relocation is propagated to the linker output, such that the
6115 dynamic linker creates the canonical descriptor, pointing to the
6116 dynamically-resolved definition of the function.
6118 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
6119 symbols that are assigned to the same segment as the GOT, but we
6120 can only check this later, after we know the complete set of
6121 symbols defined and/or exported.
6123 FUNCDESC GOTOFF relocations require a function descriptor to be
6124 created and, unless lazy binding is disabled or the symbol is not
6125 dynamic, a lazy PLT entry. Since we can't tell at this point
6126 whether a symbol is going to be dynamic, we have to decide later
6127 whether to create a lazy PLT entry or bind the descriptor directly
6128 to the private function.
6130 FUNCDESC_VALUE relocations are not supposed to be present in object
6131 files, but they may very well be simply propagated to the linker
6132 output, since they have no side effect.
6135 A function descriptor always requires a FUNCDESC_VALUE relocation.
6136 Whether it's in .plt.rel or not depends on whether lazy binding is
6137 enabled and on whether the referenced symbol is dynamic.
6139 The existence of a lazy PLT requires the resolverStub lazy PLT
6140 entry to be present.
6143 As for assignment of GOT, PLT and lazy PLT entries, and private
6144 descriptors, we might do them all sequentially, but we can do
6145 better than that. For example, we can place GOT entries and
6146 private function descriptors referenced using 12-bit operands
6147 closer to the PIC register value, such that these relocations don't
6148 overflow. Those that are only referenced with LO16 relocations
6149 could come next, but we may as well place PLT-required function
6150 descriptors in the 12-bit range to make them shorter. Symbols
6151 referenced with LO16/HI16 may come next, but we may place
6152 additional function descriptors in the 16-bit range if we can
6153 reliably tell that we've already placed entries that are ever
6154 referenced with only LO16. PLT entries are therefore generated as
6155 small as possible, while not introducing relocation overflows in
6156 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6157 generated before or after PLT entries, but not intermingled with
6158 them, such that we can have more lazy PLT entries in range for a
6159 branch to the resolverStub. The resolverStub should be emitted at
6160 the most distant location from the first lazy PLT entry such that
6161 it's still in range for a branch, or closer, if there isn't a need
6162 for so many lazy PLT entries. Additional lazy PLT entries may be
6163 emitted after the resolverStub, as long as branches are still in
6164 range. If the branch goes out of range, longer lazy PLT entries
6165 are emitted.
6167 We could further optimize PLT and lazy PLT entries by giving them
6168 priority in assignment to closer-to-gr17 locations depending on the
6169 number of occurrences of references to them (assuming a function
6170 that's called more often is more important for performance, so its
6171 PLT entry should be faster), or taking hints from the compiler.
6172 Given infinite time and money... :-) */
6174 static bfd_boolean
6180 {
6200 {
6207 else
6208 {
6213 }
6216 {
6246 /* Fall through. */
6254 {
6258 }
6260 {
6263 }
6265 {
6268 {
6275 }
6276 picrel
6280 }
6281 else
6292 }
6295 {
6305 /* Fall through. */
6393 /* This relocation describes the C++ object vtable hierarchy.
6394 Reconstruct it for later use during GC. */
6400 /* This relocation describes which C++ vtable entries are actually
6401 used. Record for later use during GC. */
6421 bad_reloc:
6426 }
6427 }
6430 }
6432 \f
6433 /* Return the machine subcode from the ELF e_flags header. */
6435 static int
6438 {
6440 {
6450 }
6453 }
6455 /* Set the right machine number for a FRV ELF file. */
6457 static bfd_boolean
6460 {
6464 }
6465 \f
6466 /* Function to set the ELF flag bits. */
6468 static bfd_boolean
6471 flagword flags;
6472 {
6476 }
6478 /* Copy backend specific data from one object module to another. */
6480 static bfd_boolean
6484 {
6495 /* Copy object attributes. */
6499 }
6501 /* Return true if the architecture described by elf header flag
6502 EXTENSION is an extension of the architecture described by BASE. */
6504 static bfd_boolean
6506 {
6510 /* CPU_GENERIC code can be merged with code for a specific
6511 architecture, in which case the result is marked as being
6512 for the specific architecture. Everything is therefore
6513 an extension of CPU_GENERIC. */
6526 }
6528 static bfd_boolean
6530 {
6544 /* Copy the stack size. */
6547 {
6552 {
6555 /* Rewrite the phdrs, since we're only called after they
6556 were first written. */
6564 }
6567 }
6570 }
6572 /* Merge backend specific data from an object file to the output
6573 object file when linking. */
6575 static bfd_boolean
6579 {
6593 #ifdef DEBUG
6597 #endif
6600 {
6603 }
6606 ;
6609 {
6610 /* Warn if different # of gprs are used. Note, 0 means nothing is
6611 said about the size of gprs. */
6615 ;
6618 ;
6623 else
6624 {
6626 {
6630 }
6633 {
6637 }
6638 }
6640 /* Warn if different # of fprs are used. Note, 0 means nothing is
6641 said about the size of fprs. */
6645 ;
6648 ;
6653 else
6654 {
6656 {
6661 }
6664 {
6669 }
6670 }
6672 /* Warn if different dword support was used. Note, 0 means nothing is
6673 said about the dword support. */
6677 ;
6680 ;
6685 else
6686 {
6688 {
6692 }
6695 {
6699 }
6700 }
6702 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6703 feature is used. */
6705 | EF_FRV_MEDIA
6706 | EF_FRV_MULADD
6709 /* If any module was compiled without -G0, clear the G0 bit. */
6713 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6717 /* We don't have to do anything if the pic flags are the same, or the new
6718 module(s) were compiled with -mlibrary-pic. */
6722 ;
6724 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6725 flags if any from the new module. */
6729 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6733 /* One module was compiled for pic and the other was not, see if we have
6734 had any relocations that are not pic-safe. */
6735 else
6736 {
6739 else
6740 {
6742 #ifndef FRV_NO_PIC_ERROR
6748 #endif
6749 }
6750 }
6752 /* Warn if different cpu is used (allow a specific cpu to override
6753 the generic cpu). */
6757 ;
6762 else
6763 {
6765 {
6776 }
6779 {
6790 }
6791 }
6793 /* Print out any mismatches from above. */
6795 {
6800 }
6802 /* Warn about any other mismatches */
6806 {
6812 }
6813 }
6815 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6819 /* Update the old flags now with changes made above. */
6827 {
6833 else
6837 }
6843 }
6845 \f
6846 bfd_boolean
6849 PTR ptr;
6850 {
6852 flagword flags;
6856 /* Print normal ELF private data. */
6863 {
6873 }
6876 {
6880 }
6883 {
6888 }
6891 {
6895 }
6926 }
6928 \f
6929 /* Support for core dump NOTE sections. */
6931 static bfd_boolean
6933 {
6938 {
6942 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6943 hardcoded offsets and sizes listed below (and contained within
6944 this lexical block) refer to fields in the target's elf_prstatus
6945 struct. */
6947 /* `pr_cursig' is at offset 12. */
6950 /* `pr_pid' is at offset 24. */
6953 /* `pr_reg' is at offset 72. */
6956 /* Most grok_prstatus implementations set `raw_size' to the size
6957 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6958 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6959 and `pr_interp_fdpic_loadmap', both of which (by design)
6960 immediately follow `pr_reg'. This will allow these fields to
6961 be viewed by GDB as registers.
6963 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6964 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6968 }
6970 /* Make a ".reg/999" section. */
6973 }
6975 static bfd_boolean
6977 {
6979 {
6983 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6986 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6990 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6993 }
6995 /* Note that for some reason, a spurious space is tacked
6996 onto the end of the args in some (at least one anyway)
6997 implementations, so strip it off if it exists. */
6999 {
7005 }
7008 }
7009 #define ELF_ARCH bfd_arch_frv
7010 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
7011 #define ELF_MAXPAGESIZE 0x1000
7013 #define TARGET_BIG_SYM bfd_elf32_frv_vec
7016 #define elf_info_to_howto frv_info_to_howto_rela
7017 #define elf_backend_relocate_section elf32_frv_relocate_section
7018 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
7019 #define elf_backend_check_relocs elf32_frv_check_relocs
7020 #define elf_backend_object_p elf32_frv_object_p
7021 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
7023 #define elf_backend_can_gc_sections 1
7024 #define elf_backend_rela_normal 1
7026 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
7027 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
7028 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
7029 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
7030 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
7031 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
7033 #define elf_backend_want_got_sym 1
7034 #define elf_backend_got_header_size 0
7035 #define elf_backend_want_got_plt 0
7036 #define elf_backend_plt_readonly 1
7037 #define elf_backend_want_plt_sym 0
7038 #define elf_backend_plt_header_size 0
7040 #define elf_backend_finish_dynamic_sections \
7041 elf32_frv_finish_dynamic_sections
7043 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
7044 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
7048 #undef ELF_MAXPAGESIZE
7049 #define ELF_MAXPAGESIZE 0x4000
7051 #undef TARGET_BIG_SYM
7052 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
7053 #undef TARGET_BIG_NAME
7055 #undef elf32_bed
7056 #define elf32_bed elf32_frvfdpic_bed
7058 #undef elf_info_to_howto_rel
7059 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
7061 #undef bfd_elf32_bfd_link_hash_table_create
7062 #define bfd_elf32_bfd_link_hash_table_create \
7063 frvfdpic_elf_link_hash_table_create
7064 #undef elf_backend_always_size_sections
7065 #define elf_backend_always_size_sections \
7066 elf32_frvfdpic_always_size_sections
7067 #undef elf_backend_modify_program_headers
7068 #define elf_backend_modify_program_headers \
7069 elf32_frvfdpic_modify_program_headers
7070 #undef bfd_elf32_bfd_copy_private_bfd_data
7071 #define bfd_elf32_bfd_copy_private_bfd_data \
7072 elf32_frvfdpic_copy_private_bfd_data
7074 #undef elf_backend_create_dynamic_sections
7075 #define elf_backend_create_dynamic_sections \
7076 elf32_frvfdpic_create_dynamic_sections
7077 #undef elf_backend_adjust_dynamic_symbol
7078 #define elf_backend_adjust_dynamic_symbol \
7079 elf32_frvfdpic_adjust_dynamic_symbol
7080 #undef elf_backend_size_dynamic_sections
7081 #define elf_backend_size_dynamic_sections \
7082 elf32_frvfdpic_size_dynamic_sections
7083 #undef bfd_elf32_bfd_relax_section
7084 #define bfd_elf32_bfd_relax_section \
7085 elf32_frvfdpic_relax_section
7086 #undef elf_backend_finish_dynamic_symbol
7087 #define elf_backend_finish_dynamic_symbol \
7088 elf32_frvfdpic_finish_dynamic_symbol
7089 #undef elf_backend_finish_dynamic_sections
7090 #define elf_backend_finish_dynamic_sections \
7091 elf32_frvfdpic_finish_dynamic_sections
7093 #undef elf_backend_discard_info
7094 #define elf_backend_discard_info \
7095 frvfdpic_elf_discard_info
7096 #undef elf_backend_can_make_relative_eh_frame
7097 #define elf_backend_can_make_relative_eh_frame \
7098 frvfdpic_elf_use_relative_eh_frame
7099 #undef elf_backend_can_make_lsda_relative_eh_frame
7100 #define elf_backend_can_make_lsda_relative_eh_frame \
7101 frvfdpic_elf_use_relative_eh_frame
7102 #undef elf_backend_encode_eh_address
7103 #define elf_backend_encode_eh_address \
7104 frvfdpic_elf_encode_eh_address
7106 #undef elf_backend_may_use_rel_p
7107 #define elf_backend_may_use_rel_p 1
7108 #undef elf_backend_may_use_rela_p
7109 #define elf_backend_may_use_rela_p 1
7110 /* We use REL for dynamic relocations only. */
7111 #undef elf_backend_default_use_rela_p
7112 #define elf_backend_default_use_rela_p 1
7114 #undef elf_backend_omit_section_dynsym
7115 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym