| blob | 9908c0112a5fac731f355c32f565636e469cf187 |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright (C) 2002-2020 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 3 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,
19 MA 02110-1301, USA. */
30 /* Forward declarations. */
34 {
35 /* This reloc does nothing. */
50 /* A 32 bit absolute relocation. */
65 /* A 16 bit pc-relative relocation. */
80 /* A 24-bit pc-relative relocation. */
193 /* A 12-bit signed operand with the GOT offset for the address of
194 the symbol. */
209 /* The upper 16 bits of the GOT offset for the address of the
210 symbol. */
225 /* The lower 16 bits of the GOT offset for the address of the
226 symbol. */
241 /* The 32-bit address of the canonical descriptor of a function. */
256 /* A 12-bit signed operand with the GOT offset for the address of
257 canonical descriptor of a function. */
272 /* The upper 16 bits of the GOT offset for the address of the
273 canonical descriptor of a function. */
288 /* The lower 16 bits of the GOT offset for the address of the
289 canonical descriptor of a function. */
304 /* The 64-bit descriptor of a function. */
319 /* A 12-bit signed operand with the GOT offset for the address of
320 canonical descriptor of a function. */
335 /* The upper 16 bits of the GOT offset for the address of the
336 canonical descriptor of a function. */
351 /* The lower 16 bits of the GOT offset for the address of the
352 canonical descriptor of a function. */
367 /* A 12-bit signed operand with the GOT offset for the address of
368 the symbol. */
383 /* The upper 16 bits of the GOT offset for the address of the
384 symbol. */
399 /* The lower 16 bits of the GOT offset for the address of the
400 symbol. */
415 /* A 24-bit pc-relative relocation referencing the TLS PLT entry for
416 a thread-local symbol. If the symbol number is 0, it refers to
417 the module. */
432 /* A 64-bit TLS descriptor for a symbol. This relocation is only
433 valid as a REL, dynamic relocation. */
448 /* A 12-bit signed operand with the GOT offset for the TLS
449 descriptor of the symbol. */
464 /* The upper 16 bits of the GOT offset for the TLS descriptor of the
465 symbol. */
480 /* The lower 16 bits of the GOT offset for the TLS descriptor of the
481 symbol. */
496 /* A 12-bit signed operand with the offset from the module base
497 address to the thread-local symbol address. */
512 /* The upper 16 bits of the offset from the module base address to
513 the thread-local symbol address. */
528 /* The lower 16 bits of the offset from the module base address to
529 the thread-local symbol address. */
544 /* A 12-bit signed operand with the GOT offset for the TLSOFF entry
545 for a symbol. */
560 /* The upper 16 bits of the GOT offset for the TLSOFF entry for a
561 symbol. */
576 /* The lower 16 bits of the GOT offset for the TLSOFF entry for a
577 symbol. */
592 /* The 32-bit offset from the thread pointer (not the module base
593 address) to a thread-local symbol. */
608 /* An annotation for linker relaxation, that denotes the
609 symbol+addend whose TLS descriptor is referenced by the sum of
610 the two input registers of an ldd instruction. */
625 /* An annotation for linker relaxation, that denotes the
626 symbol+addend whose TLS resolver entry point is given by the sum
627 of the two register operands of an calll instruction. */
642 /* An annotation for linker relaxation, that denotes the
643 symbol+addend whose TLS offset GOT entry is given by the sum of
644 the two input registers of an ld instruction. */
659 /* A 32-bit offset from the module base address to
660 the thread-local symbol address. */
674 };
676 /* GNU extension to record C++ vtable hierarchy. */
692 /* GNU extension to record C++ vtable member usage. */
708 /* The following 3 relocations are REL. The only difference to the
709 entries in the table above are that partial_inplace is TRUE. */
756 /* A 64-bit TLS descriptor for a symbol. The first word resolves to
757 an entry point, and the second resolves to a special argument.
758 If the symbol turns out to be in static TLS, the entry point is a
759 return instruction, and the special argument is the TLS offset
760 for the symbol. If it's in dynamic TLS, the entry point is a TLS
761 offset resolver, and the special argument is a pointer to a data
762 structure allocated by the dynamic loader, containing the GOT
763 address for the offset resolver, the module id, the offset within
764 the module, and anything else the TLS offset resolver might need
765 to determine the TLS offset for the symbol in the running
766 thread. */
782 /* The 32-bit offset from the thread pointer (not the module base
783 address) to a thread-local symbol. */
799 \f
801 #define IS_FDPIC(bfd) ((bfd)->xvec == &frv_elf32_fdpic_vec)
803 /* An extension of the elf hash table data structure, containing some
804 additional FRV-specific data. */
805 struct frvfdpic_elf_link_hash_table
806 {
809 /* A pointer to the .rofixup section. */
811 /* GOT base offset. */
812 bfd_vma got0;
813 /* Location of the first non-lazy PLT entry, i.e., the number of
814 bytes taken by lazy PLT entries. If locally-bound TLS
815 descriptors require a ret instruction, it will be placed at this
816 offset. */
817 bfd_vma plt0;
818 /* A hash table holding information about which symbols were
819 referenced with which PIC-related relocations. */
821 /* Summary reloc information collected by
822 _frvfdpic_count_got_plt_entries. */
824 };
826 /* Get the FRV ELF linker hash table from a link_info structure. */
828 #define frvfdpic_hash_table(p) \
829 ((is_elf_hash_table ((p)->hash) \
830 && elf_hash_table_id (elf_hash_table (p)) == FRV_ELF_DATA) \
831 ? (struct frvfdpic_elf_link_hash_table *) (p)->hash : NULL)
833 #define frvfdpic_got_section(info) \
834 (frvfdpic_hash_table (info)->elf.sgot)
835 #define frvfdpic_gotrel_section(info) \
836 (frvfdpic_hash_table (info)->elf.srelgot)
837 #define frvfdpic_gotfixup_section(info) \
838 (frvfdpic_hash_table (info)->sgotfixup)
839 #define frvfdpic_plt_section(info) \
840 (frvfdpic_hash_table (info)->elf.splt)
841 #define frvfdpic_pltrel_section(info) \
842 (frvfdpic_hash_table (info)->elf.srelplt)
843 #define frvfdpic_relocs_info(info) \
844 (frvfdpic_hash_table (info)->relocs_info)
845 #define frvfdpic_got_initial_offset(info) \
846 (frvfdpic_hash_table (info)->got0)
847 #define frvfdpic_plt_initial_offset(info) \
848 (frvfdpic_hash_table (info)->plt0)
849 #define frvfdpic_dynamic_got_plt_info(info) \
850 (frvfdpic_hash_table (info)->g)
852 /* Currently it's the same, but if some day we have a reason to change
853 it, we'd better be using a different macro.
855 FIXME: if there's any TLS PLT entry that uses local-exec or
856 initial-exec models, we could use the ret at the end of any of them
857 instead of adding one more. */
858 #define frvfdpic_plt_tls_ret_offset(info) \
859 (frvfdpic_plt_initial_offset (info))
861 /* The name of the dynamic interpreter. This is put in the .interp
862 section. */
866 #define DEFAULT_STACK_SIZE 0x20000
868 /* This structure is used to collect the number of entries present in
869 each addressable range of the got. */
870 struct _frvfdpic_dynamic_got_info
871 {
872 /* Several bits of information about the current link. */
874 /* Total GOT size needed for GOT entries within the 12-, 16- or 32-bit
875 ranges. */
877 /* Total GOT size needed for function descriptor entries within the 12-,
878 16- or 32-bit ranges. */
880 /* Total GOT size needed by function descriptor entries referenced
881 in PLT entries, that would be profitable to place in offsets
882 close to the PIC register. */
883 bfd_vma fdplt;
884 /* Total PLT size needed by lazy PLT entries. */
885 bfd_vma lzplt;
886 /* Total GOT size needed for TLS descriptor entries within the 12-,
887 16- or 32-bit ranges. */
889 /* Total GOT size needed by TLS descriptors referenced in PLT
890 entries, that would be profitable to place in offers close to the
891 PIC register. */
892 bfd_vma tlsdplt;
893 /* Total PLT size needed by TLS lazy PLT entries. */
894 bfd_vma tlslzplt;
895 /* Number of relocations carried over from input object files. */
897 /* Number of fixups introduced by relocations in input object files. */
899 /* The number of fixups that reference the ret instruction added to
900 the PLT for locally-resolved TLS descriptors. */
902 };
904 /* This structure is used to assign offsets to got entries, function
905 descriptors, plt entries and lazy plt entries. */
907 struct _frvfdpic_dynamic_got_plt_info
908 {
909 /* Summary information collected with _frvfdpic_count_got_plt_entries. */
912 /* For each addressable range, we record a MAX (positive) and MIN
913 (negative) value. CUR is used to assign got entries, and it's
914 incremented from an initial positive value to MAX, then from MIN
915 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
916 assign function descriptors, and it's decreased from an initial
917 non-positive value to MIN, then from MAX down to CUR (unless CUR
918 wraps around first). All of MIN, MAX, CUR and FDCUR always point
919 to even words. ODD, if non-zero, indicates an odd word to be
920 used for the next got entry, otherwise CUR is used and
921 incremented by a pair of words, wrapping around when it reaches
922 MAX. FDCUR is decremented (and wrapped) before the next function
923 descriptor is chosen. FDPLT indicates the number of remaining
924 slots that can be used for function descriptors used only by PLT
925 entries.
927 TMAX, TMIN and TCUR are used to assign TLS descriptors. TCUR
928 starts as MAX, and grows up to TMAX, then wraps around to TMIN
929 and grows up to MIN. TLSDPLT indicates the number of remaining
930 slots that can be used for TLS descriptors used only by TLS PLT
931 entries. */
932 struct _frvfdpic_dynamic_got_alloc_data
933 {
938 };
940 /* Create an FRV ELF linker hash table. */
944 {
953 _bfd_elf_link_hash_newfunc,
955 FRV_ELF_DATA))
956 {
959 }
962 }
964 /* Decide whether a reference to a symbol can be resolved locally or
965 not. If the symbol is protected, we want the local address, but
966 its function descriptor must be assigned by the dynamic linker. */
967 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
968 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
969 || ! elf_hash_table (INFO)->dynamic_sections_created)
970 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
971 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
973 /* This structure collects information on what kind of GOT, PLT or
974 function descriptors are required by relocations that reference a
975 certain symbol. */
976 struct frvfdpic_relocs_info
977 {
978 /* The index of the symbol, as stored in the relocation r_info, if
979 we have a local symbol; -1 otherwise. */
981 union
982 {
983 /* The input bfd in which the symbol is defined, if it's a local
984 symbol. */
986 /* If symndx == -1, the hash table entry corresponding to a global
987 symbol (even if it turns out to bind locally, in which case it
988 should ideally be replaced with section's symndx + addend). */
991 /* The addend of the relocation that references the symbol. */
992 bfd_vma addend;
994 /* The fields above are used to identify an entry. The fields below
995 contain information on how an entry is used and, later on, which
996 locations it was assigned. */
997 /* The following 3 fields record whether the symbol+addend above was
998 ever referenced with a GOT relocation. The 12 suffix indicates a
999 GOT12 relocation; los is used for GOTLO relocations that are not
1000 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1001 pairs. */
1005 /* Whether a FUNCDESC relocation references symbol+addend. */
1007 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1011 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1015 /* Whether a GETTLSOFF relocation references symbol+addend. */
1017 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1018 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1019 We might instead just pre-compute flags telling whether the
1020 object is suitable for local exec, initial exec or general
1021 dynamic addressing, and use that all over the place. We could
1022 also try to do a better job of merging TLSOFF and TLSDESC entries
1023 in main executables, but perhaps we can get rid of TLSDESC
1024 entirely in them instead. */
1025 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1029 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1033 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1034 GOTOFFHI relocations. The addend doesn't really matter, since we
1035 envision that this will only be used to check whether the symbol
1036 is mapped to the same segment as the got. */
1038 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1040 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1041 relocation. */
1043 /* Whether we need a PLT entry for a symbol. Should be implied by
1044 something like:
1045 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1047 /* Whether a function descriptor should be created in this link unit
1048 for symbol+addend. Should be implied by something like:
1049 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1050 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1051 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1053 /* Whether a lazy PLT entry is needed for this symbol+addend.
1054 Should be implied by something like:
1055 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1056 && ! (info->flags & DF_BIND_NOW)) */
1058 /* Whether we've already emitted GOT relocations and PLT entries as
1059 needed for this symbol. */
1062 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1063 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1064 symbol+addend. */
1067 /* The number of .rofixups entries and dynamic relocations allocated
1068 for this symbol, minus any that might have already been used. */
1071 /* The offsets of the GOT entries assigned to symbol+addend, to the
1072 function descriptor's address, and to a function descriptor,
1073 respectively. Should be zero if unassigned. The offsets are
1074 counted from the value that will be assigned to the PIC register,
1075 not from the beginning of the .got section. */
1077 /* The offsets of the PLT entries assigned to symbol+addend,
1078 non-lazy and lazy, respectively. If unassigned, should be
1079 (bfd_vma)-1. */
1081 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1083 /* The offset of the TLS offset PLT entry. */
1084 bfd_vma tlsplt_entry;
1085 };
1087 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1088 static hashval_t
1090 {
1096 }
1098 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1099 identical. */
1100 static int
1102 {
1108 }
1110 /* Find or create an entry in a hash table HT that matches the key
1111 fields of the given ENTRY. If it's not found, memory for a new
1112 entry is allocated in ABFD's obstack. */
1118 {
1141 }
1143 /* Obtain the address of the entry in HT associated with H's symbol +
1144 addend, creating a new entry if none existed. ABFD is only used
1145 for memory allocation purposes. */
1150 bfd_vma addend,
1152 {
1160 }
1162 /* Obtain the address of the entry in HT associated with the SYMNDXth
1163 local symbol of the input bfd ABFD, plus the addend, creating a new
1164 entry if none existed. */
1169 bfd_vma addend,
1171 {
1179 }
1181 /* Merge fields set by check_relocs() of two entries that end up being
1182 mapped to the same (presumably global) symbol. */
1187 {
1208 }
1210 /* Every block of 65535 lazy PLT entries shares a single call to the
1211 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1212 32767, counting from 0). All other lazy PLT entries branch to it
1213 in a single instruction. */
1215 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1216 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1218 /* Add a dynamic relocation to the SRELOC section. */
1224 {
1225 Elf_Internal_Rela outrel;
1226 bfd_vma reloc_offset;
1238 /* If the entry's index is zero, this relocation was probably to a
1239 linkonce section that got discarded. We reserved a dynamic
1240 relocation, but it was for another entry than the one we got at
1241 the time of emitting the relocation. Unfortunately there's no
1242 simple way for us to catch this situation, since the relocation
1243 is cleared right before calling relocate_section, at which point
1244 we no longer know what the relocation used to point to. */
1246 {
1249 }
1252 }
1254 /* Add a fixup to the ROFIXUP section. */
1256 static bfd_vma
1259 {
1260 bfd_vma fixup_offset;
1267 {
1270 }
1274 {
1275 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1276 above. */
1279 }
1282 }
1284 /* Find the segment number in which OSEC, and output section, is
1285 located. */
1287 static unsigned
1289 {
1293 }
1297 {
1301 }
1303 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1305 /* Return the base VMA address which should be subtracted from real addresses
1306 when resolving TLSMOFF relocation.
1307 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1309 static bfd_vma
1311 {
1312 /* If tls_sec is NULL, we should have signalled an error already. */
1316 }
1318 /* Generate relocations for GOT entries, function descriptors, and
1319 code for PLT and lazy PLT entries. */
1327 bfd_vma addend)
1329 {
1339 {
1340 /* If the symbol is dynamic, consider it for dynamic
1341 relocations, otherwise decay to section + offset. */
1344 else
1345 {
1351 else
1353 }
1354 }
1356 /* Generate relocation for GOT entry pointing to the symbol. */
1358 {
1362 /* If the symbol is dynamic but binds locally, use
1363 section+offset. */
1366 {
1369 else
1374 else
1376 }
1378 /* If we're linking an executable at a fixed address, we can
1379 omit the dynamic relocation as long as the symbol is local to
1380 this module. */
1384 {
1392 ->vma
1396 }
1397 else
1399 _bfd_elf_section_offset
1413 }
1415 /* Generate relocation for GOT entry pointing to a canonical
1416 function descriptor. */
1418 {
1425 {
1426 /* If the symbol is dynamic and there may be dynamic symbol
1427 resolution because we are, or are linked with, a shared
1428 library, emit a FUNCDESC relocation such that the dynamic
1429 linker will allocate the function descriptor. If the
1430 symbol needs a non-local function descriptor but binds
1431 locally (e.g., its visibility is protected, emit a
1432 dynamic relocation decayed to section+offset. */
1437 {
1443 }
1446 {
1451 {
1458 }
1459 }
1460 else
1461 {
1462 /* Otherwise, we know we have a private function descriptor,
1463 so reference it directly. */
1471 }
1473 /* If there is room for dynamic symbol resolution, emit the
1474 dynamic relocation. However, if we're linking an
1475 executable at a fixed location, we won't have emitted a
1476 dynamic symbol entry for the got section, so idx will be
1477 zero, which means we can and should compute the address
1478 of the private descriptor ourselves. */
1482 {
1489 ->output_offset
1492 }
1493 else
1496 _bfd_elf_section_offset
1506 }
1512 }
1514 /* Generate relocation to fill in a private function descriptor in
1515 the GOT. */
1517 {
1520 bfd_vma ofst;
1523 /* If the symbol is dynamic but binds locally, use
1524 section+offset. */
1527 {
1530 else
1535 else
1537 }
1539 /* If we're linking an executable at a fixed address, we can
1540 omit the dynamic relocation as long as the symbol is local to
1541 this module. */
1544 {
1550 {
1556 ->output_offset
1564 ->output_offset
1567 }
1568 }
1569 else
1570 {
1571 ofst =
1573 entry->lazyplt
1576 _bfd_elf_section_offset
1586 }
1588 /* If we've omitted the dynamic relocation, just emit the fixed
1589 addresses of the symbol and of the local GOT base offset. */
1591 && sec
1593 {
1598 }
1600 {
1602 {
1609 }
1613 /* A function descriptor used for lazy or local resolving is
1614 initialized such that its high word contains the output
1615 section index in which the PLT entries are located, and
1616 the low word contains the address of the lazy PLT entry
1617 entry point, that must be within the memory region
1618 assigned to that section. */
1622 highword = _frvfdpic_osec_to_segment
1624 }
1625 else
1626 {
1627 /* A function descriptor for a local function gets the index
1628 of the section. For a non-local function, it's
1629 disregarded. */
1635 else
1636 highword = _frvfdpic_osec_to_segment
1638 }
1648 }
1650 /* Generate code for the PLT entry. */
1652 {
1658 /* Figure out what kind of PLT entry we need, depending on the
1659 location of the function descriptor within the GOT. */
1662 {
1663 /* lddi @(gr15, fd_entry), gr14 */
1666 plt_code);
1668 }
1669 else
1670 {
1673 {
1674 /* setlos lo(fd_entry), gr14 */
1676 0x9cfc0000
1678 plt_code);
1680 }
1681 else
1682 {
1683 /* sethi.p hi(fd_entry), gr14
1684 setlo lo(fd_entry), gr14 */
1686 0x1cf80000
1689 plt_code);
1692 0x9cf40000
1694 plt_code);
1696 }
1697 /* ldd @(gr14,gr15),gr14 */
1700 }
1701 /* jmpl @(gr14,gr0) */
1703 }
1705 /* Generate code for the lazy PLT entry. */
1707 {
1710 bfd_vma resolverStub_addr;
1721 {
1722 /* This is a lazy PLT entry that includes a resolver call. */
1723 /* ldd @(gr15,gr0), gr4
1724 jmpl @(gr4,gr0) */
1727 }
1728 else
1729 {
1730 /* bra resolverStub */
1732 0xc01a0000
1735 lzplt_code);
1736 }
1737 }
1739 /* Generate relocation for GOT entry holding the TLS offset. */
1741 {
1747 {
1748 /* If the symbol is dynamic but binds locally, use
1749 section+offset. */
1751 {
1754 else
1760 else
1762 }
1763 }
1765 /* *ABS*+addend is special for TLS relocations, use only the
1766 addend. */
1771 ;
1772 /* If we're linking an executable, we can entirely omit the
1773 dynamic relocation if the symbol is local to this module. */
1777 {
1780 }
1781 else
1782 {
1786 {
1788 {
1793 }
1796 }
1798 _bfd_elf_section_offset
1808 }
1814 }
1817 {
1821 /* If the symbol is dynamic but binds locally, use
1822 section+offset. */
1825 {
1828 else
1833 else
1835 }
1837 /* If we didn't set up a TLS offset entry, but we're linking an
1838 executable and the symbol binds locally, we can use the
1839 module offset in the TLS descriptor in relaxations. */
1849 {
1850 /* *ABS*+addend is special for TLS relocations, use only the
1851 addend for the TLS offset, and take the module id as
1852 0. */
1856 ;
1857 /* For other TLS symbols that bind locally, add the section
1858 TLS offset to the addend. */
1875 ->output_offset
1881 /* We've used one of the reserved fixups, so discount it so
1882 that we can check at the end that we've used them
1883 all. */
1886 /* While at that, make sure the ret instruction makes to the
1887 right location in the PLT. We could do it only when we
1888 got to 0, but since the check at the end will only print
1889 a warning, make sure we have the ret in place in case the
1890 warning is missed. */
1894 }
1895 else
1896 {
1900 {
1902 {
1907 }
1910 }
1913 _bfd_elf_section_offset
1928 }
1934 }
1936 /* Generate code for the get-TLS-offset PLT entry. */
1938 {
1945 {
1949 /* sec may be NULL when referencing an undefweak symbol
1950 while linking a static executable. */
1952 {
1955 }
1956 else
1957 {
1960 else
1966 else
1968 }
1970 /* *ABS*+addend is special for TLS relocations, use only the
1971 addend for the TLS offset, and take the module id as
1972 0. */
1976 ;
1977 /* For other TLS symbols that bind locally, add the section
1978 TLS offset to the addend. */
1984 {
1985 /* setlos lo(ad), gr9 */
1987 0x92fc0000
1988 | (ad
1990 plt_code);
1992 }
1993 else
1994 {
1995 /* sethi.p hi(ad), gr9
1996 setlo lo(ad), gr9 */
1998 0x12f80000
2001 plt_code);
2004 0x92f40000
2005 | (ad
2007 plt_code);
2009 }
2010 /* ret */
2012 }
2014 {
2015 /* Figure out what kind of PLT entry we need, depending on the
2016 location of the TLS descriptor within the GOT. */
2019 {
2020 /* ldi @(gr15, tlsoff_entry), gr9 */
2024 plt_code);
2026 }
2027 else
2028 {
2031 {
2032 /* setlos lo(tlsoff_entry), gr8 */
2034 0x90fc0000
2037 plt_code);
2039 }
2040 else
2041 {
2042 /* sethi.p hi(tlsoff_entry), gr8
2043 setlo lo(tlsoff_entry), gr8 */
2045 0x10f80000
2048 plt_code);
2051 0x90f40000
2054 plt_code);
2056 }
2057 /* ld @(gr15,gr8),gr9 */
2060 }
2061 /* ret */
2063 }
2064 else
2065 {
2068 /* Figure out what kind of PLT entry we need, depending on the
2069 location of the TLS descriptor within the GOT. */
2072 {
2073 /* lddi @(gr15, tlsdesc_entry), gr8 */
2077 plt_code);
2079 }
2080 else
2081 {
2084 {
2085 /* setlos lo(tlsdesc_entry), gr8 */
2087 0x90fc0000
2090 plt_code);
2092 }
2093 else
2094 {
2095 /* sethi.p hi(tlsdesc_entry), gr8
2096 setlo lo(tlsdesc_entry), gr8 */
2098 0x10f80000
2101 plt_code);
2104 0x90f40000
2107 plt_code);
2109 }
2110 /* ldd @(gr15,gr8),gr8 */
2113 }
2114 /* jmpl @(gr8,gr0) */
2116 }
2117 }
2120 }
2122 /* Handle an FRV small data reloc. */
2124 static bfd_reloc_status_type
2130 bfd_vma value)
2131 {
2132 bfd_vma insn;
2133 bfd_vma gp;
2157 }
2159 /* Handle an FRV small data reloc. for the u12 field. */
2161 static bfd_reloc_status_type
2167 bfd_vma value)
2168 {
2169 bfd_vma insn;
2170 bfd_vma gp;
2172 bfd_vma mask;
2190 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2197 }
2199 /* Handle an FRV ELF HI16 reloc. */
2201 static bfd_reloc_status_type
2205 bfd_vma value)
2206 {
2207 bfd_vma insn;
2222 }
2223 static bfd_reloc_status_type
2227 bfd_vma value)
2228 {
2229 bfd_vma insn;
2243 }
2245 /* Perform the relocation for the CALL label24 instruction. */
2247 static bfd_reloc_status_type
2252 bfd_vma value)
2253 {
2254 bfd_vma insn;
2255 bfd_vma label6;
2256 bfd_vma label18;
2258 /* The format for the call instruction is:
2260 0 000000 0001111 000000000000000000
2261 label6 opcode label18
2263 The branch calculation is: pc + (4*label24)
2264 where label24 is the concatenation of label6 and label18. */
2266 /* Grab the instruction. */
2287 }
2289 static bfd_reloc_status_type
2295 bfd_vma value)
2296 {
2297 bfd_vma insn;
2298 bfd_vma gp;
2320 }
2322 static bfd_reloc_status_type
2328 bfd_vma value)
2329 {
2330 bfd_vma insn;
2331 bfd_vma gp;
2354 }
2358 bfd_reloc_code_real_type code)
2359 {
2361 {
2372 /* Fall through. */
2510 }
2513 }
2517 {
2522 i++)
2533 }
2535 /* Set the howto pointer for an FRV ELF reloc. */
2537 static bfd_boolean
2541 {
2546 {
2557 {
2558 /* xgettext:c-format */
2563 }
2566 }
2568 }
2570 /* Set the howto pointer for an FRV ELF REL reloc. */
2572 static bfd_boolean
2575 {
2580 {
2604 }
2606 }
2607 \f
2608 /* Perform a single relocation. By default we use the standard BFD
2609 routines, but a few relocs, we have to do them ourselves. */
2611 static bfd_reloc_status_type
2617 bfd_vma relocation)
2618 {
2622 }
2624 \f
2625 /* Relocate an FRV ELF section.
2627 The RELOCATE_SECTION function is called by the new ELF backend linker
2628 to handle the relocations for a section.
2630 The relocs are always passed as Rela structures; if the section
2631 actually uses Rel structures, the r_addend field will always be
2632 zero.
2634 This function is responsible for adjusting the section contents as
2635 necessary, and (if using Rela relocs and generating a relocatable
2636 output file) adjusting the reloc addend as necessary.
2638 This function does not have to worry about setting the reloc
2639 address or the reloc symbol index.
2641 LOCAL_SYMS is a pointer to the swapped in local symbols.
2643 LOCAL_SECTIONS is an array giving the section in the input file
2644 corresponding to the st_shndx field of each local symbol.
2646 The global hash table entry for the global symbols can be found
2647 via elf_sym_hashes (input_bfd).
2649 When generating relocatable output, this function must handle
2650 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2651 going to be the section symbol corresponding to the output
2652 section, which means that the addend must be adjusted
2653 accordingly. */
2655 static bfd_boolean
2664 {
2684 else
2690 else
2696 else
2701 else
2705 {
2711 bfd_vma relocation;
2712 bfd_reloc_status_type r;
2732 {
2737 name = bfd_elf_string_from_elf_section
2741 }
2742 else
2743 {
2745 bfd_boolean unresolved_reloc;
2753 }
2767 {
2770 }
2773 {
2778 /* Fall through. */
2817 else
2818 /* In order to find the entry we created before, we must
2819 use the original addend, not the one that may have been
2820 modified by _bfd_elf_rela_local_sym(). */
2830 {
2832 /* xgettext:c-format */
2837 }
2842 non_fdpic:
2848 {
2854 }
2856 }
2859 {
2882 }
2884 /* Try to apply TLS relaxations. */
2887 {
2889 #define LOCAL_EXEC_P(info, picrel) \
2890 (bfd_link_executable (info) \
2891 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2892 #define INITIAL_EXEC_P(info, picrel) \
2893 ((bfd_link_executable (info)|| (info)->flags & DF_STATIC_TLS) \
2894 && (picrel)->tlsoff_entry)
2896 #define IN_RANGE_FOR_OFST12_P(value) \
2897 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2898 #define IN_RANGE_FOR_SETLOS_P(value) \
2899 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2900 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2901 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2903 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2904 (LOCAL_EXEC_P ((info), (picrel)) \
2905 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2906 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2907 (INITIAL_EXEC_P ((info), (picrel)) \
2908 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2910 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2911 (LOCAL_EXEC_P ((info), (picrel)))
2912 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2913 (INITIAL_EXEC_P ((info), (picrel)))
2915 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2916 (LOCAL_EXEC_P ((info), (picrel)) \
2917 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2922 /* Is this a call instruction? */
2924 {
2929 }
2933 {
2934 /* Replace the call instruction (except the packing bit)
2935 with setlos #tlsmofflo(symbol+offset), gr9. */
2943 }
2946 {
2947 /* Replace the call instruction (except the packing bit)
2948 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
2956 }
2963 /* Is this an lddi instruction? */
2965 {
2971 }
2976 info))
2977 {
2978 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
2979 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
2980 Preserve the packing bit. */
2990 }
2994 {
2995 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
2996 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
2997 Preserve the packing bit. */
3007 }
3010 {
3011 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3012 with ldi @(grB, #gottlsoff12(symbol+offset),
3013 gr<C+1>. Preserve the packing bit. If gottlsoff12
3014 overflows, we'll error out, but that's sort-of ok,
3015 since we'd started with gottlsdesc12, that's actually
3016 more demanding. Compiling with -fPIE instead of
3017 -fpie would fix it; linking with --relax should fix
3018 it as well. */
3027 }
3034 /* Is this a sethi instruction? */
3036 {
3042 }
3048 {
3049 /* Replace sethi with a nop. Preserve the packing bit. */
3054 /* Nothing to relocate. */
3056 }
3059 {
3060 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3064 }
3071 /* Is this a setlo or setlos instruction? */
3073 {
3079 }
3085 {
3086 /* Replace setlo/setlos with a nop. Preserve the
3087 packing bit. */
3092 /* Nothing to relocate. */
3094 }
3097 {
3098 /* If the corresponding sethi (if it exists) decayed
3099 to a nop, make sure this becomes (or already is) a
3100 setlos, not setlo. */
3102 {
3105 }
3107 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3111 }
3118 /* Is this an ldd instruction? */
3120 {
3126 }
3131 info))
3132 {
3133 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3134 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3135 Preserve the packing bit. */
3145 }
3149 {
3150 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3151 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3152 Preserve the packing bit. */
3162 }
3166 {
3167 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3168 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3169 Preserve the packing bit. */
3179 }
3182 {
3183 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3184 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3185 Preserve the packing bit. */
3191 /* #tlsoff(symbol+offset) is just a relaxation
3192 annotation, so there's nothing left to
3193 relocate. */
3195 }
3202 /* Is this a calll or callil instruction? */
3204 {
3210 }
3215 info))
3216 {
3217 /* Replace calll with a nop. Preserve the packing bit. */
3222 /* Nothing to relocate. */
3224 }
3228 {
3229 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3230 Preserve the packing bit. */
3238 }
3241 {
3242 /* Replace calll with a nop. Preserve the packing bit. */
3247 /* Nothing to relocate. */
3249 }
3256 /* Is this an ldi instruction? */
3258 {
3264 }
3268 {
3269 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3270 with setlos #tlsmofflo(symbol+offset), grC.
3271 Preserve the packing bit. */
3279 }
3286 /* Is this a sethi instruction? */
3288 {
3294 }
3300 {
3301 /* Replace sethi with a nop. Preserve the packing bit. */
3306 /* Nothing to relocate. */
3308 }
3315 /* Is this a setlo or setlos instruction? */
3317 {
3323 }
3329 {
3330 /* Replace setlo/setlos with a nop. Preserve the
3331 packing bit. */
3336 /* Nothing to relocate. */
3338 }
3345 /* Is this an ld instruction? */
3347 {
3353 }
3357 {
3358 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3359 with setlos #tlsmofflo(symbol+offset), grC.
3360 Preserve the packing bit. */
3368 }
3372 {
3373 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3374 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3375 Preserve the packing bit. */
3383 }
3390 /* Is this a sethi instruction? */
3392 {
3398 }
3401 info))
3402 {
3403 /* Replace sethi with a nop. Preserve the packing bit. */
3408 /* Nothing to relocate. */
3410 }
3417 /* Is this a setlo or setlos instruction? */
3419 {
3425 }
3428 info))
3429 /* If the corresponding sethi (if it exists) decayed
3430 to a nop, make sure this becomes (or already is) a
3431 setlos, not setlo. */
3432 {
3435 }
3439 /*
3440 There's nothing to relax in these:
3441 R_FRV_TLSDESC_VALUE
3442 R_FRV_TLSOFF
3443 R_FRV_TLSMOFF12
3444 R_FRV_TLSMOFFHI
3445 R_FRV_TLSMOFFLO
3446 R_FRV_TLSMOFF
3447 */
3451 }
3454 {
3460 {
3465 }
3466 /* We don't want to warn on calls to undefined weak symbols,
3467 as calls to them must be protected by non-NULL tests
3468 anyway, and unprotected calls would invoke undefined
3469 behavior. */
3473 else
3513 {
3519 {
3520 /* If the symbol is dynamic and there may be dynamic
3521 symbol resolution because we are or are linked with a
3522 shared library, emit a FUNCDESC relocation such that
3523 the dynamic linker will allocate the function
3524 descriptor. If the symbol needs a non-local function
3525 descriptor but binds locally (e.g., its visibility is
3526 protected, emit a dynamic relocation decayed to
3527 section+offset. */
3531 {
3536 }
3538 {
3540 {
3547 }
3549 }
3550 else
3551 {
3552 /* Otherwise, we know we have a private function
3553 descriptor, so reference it directly. */
3561 }
3563 /* If there is room for dynamic symbol resolution, emit
3564 the dynamic relocation. However, if we're linking an
3565 executable at a fixed location, we won't have emitted a
3566 dynamic symbol entry for the got section, so idx will
3567 be zero, which means we can and should compute the
3568 address of the private descriptor ourselves. */
3571 {
3575 {
3576 bfd_vma offset;
3579 input_section
3581 {
3587 }
3589 offset = _bfd_elf_section_offset
3595 frvfdpic_gotfixup_section
3597 offset + input_section
3600 picrel);
3601 }
3602 }
3605 {
3606 bfd_vma offset;
3609 input_section
3611 {
3617 }
3619 offset = _bfd_elf_section_offset
3626 offset + input_section
3630 }
3631 else
3633 }
3635 /* We want the addend in-place because dynamic
3636 relocations are REL. Setting relocation to it should
3637 arrange for it to be installed. */
3639 }
3645 {
3648 }
3649 /* Fall through. */
3651 {
3655 /* If the symbol is dynamic but binds locally, use
3656 section+offset. */
3658 {
3660 {
3667 }
3669 }
3670 else
3671 {
3674 else
3682 else
3684 }
3686 /* If we're linking an executable at a fixed address, we
3687 can omit the dynamic relocation as long as the symbol
3688 is defined in the current link unit (which is implied
3689 by its output section not being NULL). */
3692 {
3698 {
3700 input_section
3702 {
3707 }
3709 {
3710 bfd_vma offset = _bfd_elf_section_offset
3715 {
3717 frvfdpic_gotfixup_section
3719 offset + input_section
3722 picrel);
3724 _frvfdpic_add_rofixup
3727 offset
3730 }
3731 }
3732 }
3733 }
3734 else
3735 {
3738 {
3739 bfd_vma offset;
3742 input_section
3744 {
3750 }
3752 offset = _bfd_elf_section_offset
3759 offset + input_section
3763 }
3766 /* We want the addend in-place because dynamic
3767 relocations are REL. Setting relocation to it
3768 should arrange for it to be installed. */
3770 }
3773 {
3774 /* If we've omitted the dynamic relocation, just emit
3775 the fixed addresses of the symbol and of the local
3776 GOT base offset. */
3784 else
3785 /* A function descriptor used for lazy or local
3786 resolving is initialized such that its high word
3787 contains the output section index in which the
3788 PLT entries are located, and the low word
3789 contains the offset of the lazy PLT entry entry
3790 point into that section. */
3795 sec
3798 }
3799 }
3846 {
3849 }
3851 {
3855 }
3856 else
3875 /* These shouldn't be present in input object files. */
3882 /* These are just annotations for relaxation, nothing to do
3883 here. */
3892 }
3895 {
3896 /* If you take this out, remove the #error from fdpic-static-6.d
3897 in the ld testsuite. */
3898 /* This helps catch problems in GCC while we can't do more
3899 than static linking. The idea is to test whether the
3900 input file basename is crt0.o only once. */
3902 silence_segment_error =
3911 /* We don't want duplicate errors for undefined
3912 symbols. */
3915 {
3917 /* xgettext:c-format */
3920 }
3924 }
3927 {
3930 /* We need the addend to be applied before we shift the
3931 value right. */
3933 /* Fall through. */
3940 /* Fall through. */
3954 }
3957 {
3961 /* Fall through. */
3963 /* When referencing a GOT entry, a function descriptor or a
3964 PLT, we don't want the addend to apply to the reference,
3965 but rather to the referenced symbol. The actual entry
3966 will have already been created taking the addend into
3967 account, so cancel it out here. */
3984 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
3985 here, since we do want to apply the addend to the others.
3986 Note that we've applied the addend to GOTOFFHI before we
3987 shifted it right. */
3995 }
4027 else
4032 {
4036 {
4063 }
4066 {
4068 /* xgettext:c-format */
4072 }
4073 }
4074 }
4077 }
4078 \f
4079 /* Return the section that should be marked against GC for a given
4080 relocation. */
4088 {
4091 {
4095 }
4098 }
4099 \f
4100 /* Hook called by the linker routine which adds symbols from an object
4101 file. We use it to put .comm items in .scomm, and not .comm. */
4103 static bfd_boolean
4111 {
4115 {
4116 /* Common symbols less than or equal to -G nn bytes are
4117 automatically put into .sbss. */
4122 {
4124 (SEC_ALLOC
4125 | SEC_IS_COMMON
4126 | SEC_SMALL_DATA
4130 }
4134 }
4137 }
4139 /* We need dynamic symbols for every section, since segments can
4140 relocate independently. */
4141 static bfd_boolean
4144 ATTRIBUTE_UNUSED,
4146 {
4148 {
4151 /* If sh_type is yet undecided, assume it could be
4152 SHT_PROGBITS/SHT_NOBITS. */
4156 /* There shouldn't be section relative relocations
4157 against any other section. */
4160 }
4161 }
4163 /* Create a .got section, as well as its additional info field. This
4164 is almost entirely copied from
4165 elflink.c:_bfd_elf_create_got_section(). */
4167 static bfd_boolean
4169 {
4178 /* This function may be called more than once. */
4183 /* Machine specific: although pointers are 32-bits wide, we want the
4184 GOT to be aligned to a 64-bit boundary, such that function
4185 descriptors in it can be accessed with 64-bit loads and
4186 stores. */
4200 {
4201 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4202 (or .got.plt) section. We don't do this in the linker script
4203 because we don't want to define the symbol if we are not creating
4204 a global offset table. */
4210 /* Machine-specific: we want the symbol for executables as
4211 well. */
4214 }
4216 /* The first bit of the global offset table is the header. */
4219 /* This is the machine-specific part. Create and initialize section
4220 data for the got. */
4222 {
4224 frvfdpic_relocs_info_hash,
4225 frvfdpic_relocs_info_eq,
4237 /* Machine-specific. */
4247 }
4248 else
4249 {
4252 }
4254 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4255 turns out that we're linking with a different linker script, the
4256 linker script will override it. */
4267 /* Machine-specific: we want the symbol for executables as well. */
4274 /* FDPIC supports Thread Local Storage, and this may require a
4275 procedure linkage table for TLS PLT entries. */
4277 /* This is mostly copied from
4278 elflink.c:_bfd_elf_create_dynamic_sections(). */
4291 /* FRV-specific: remember it. */
4294 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4295 .plt section. */
4297 {
4303 }
4305 /* FRV-specific: we want rel relocations for the plt. */
4311 /* FRV-specific: remember it. */
4315 }
4317 /* Make sure the got and plt sections exist, and that our pointers in
4318 the link hash table point to them. */
4320 static bfd_boolean
4322 {
4323 /* This is mostly copied from
4324 elflink.c:_bfd_elf_create_dynamic_sections(). */
4325 flagword flags;
4332 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4333 .rel[a].bss sections. */
4335 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4336 way. */
4340 /* FRV-specific: make sure we created everything we wanted. */
4347 {
4348 /* The .dynbss section is a place to put symbols which are defined
4349 by dynamic objects, are referenced by regular objects, and are
4350 not functions. We must allocate space for them in the process
4351 image and use a R_*_COPY reloc to tell the dynamic linker to
4352 initialize them at run time. The linker script puts the .dynbss
4353 section into the .bss section of the final image. */
4359 /* The .rel[a].bss section holds copy relocs. This section is not
4360 normally needed. We need to create it here, though, so that the
4361 linker will map it to an output section. We can't just create it
4362 only if we need it, because we will not know whether we need it
4363 until we have seen all the input files, and the first time the
4364 main linker code calls BFD after examining all the input files
4365 (size_dynamic_sections) the input sections have already been
4366 mapped to the output sections. If the section turns out not to
4367 be needed, we can discard it later. We will never need this
4368 section when generating a shared object, since they do not use
4369 copy relocs. */
4371 {
4379 }
4380 }
4383 }
4385 /* Compute the total GOT and PLT size required by each symbol in each
4386 range. Symbols may require up to 4 words in the GOT: an entry
4387 pointing to the symbol, an entry pointing to its function
4388 descriptor, and a private function descriptors taking two
4389 words. */
4391 static void
4394 {
4395 /* Allocate space for a GOT entry pointing to the symbol. */
4402 else
4406 /* Allocate space for a GOT entry pointing to the function
4407 descriptor. */
4414 else
4418 /* Decide whether we need a PLT entry, a function descriptor in the
4419 GOT, and a lazy PLT entry for this symbol. */
4433 /* Allocate space for a function descriptor. */
4442 else
4448 }
4450 /* Compute the total GOT size required by each TLS symbol in each
4451 range. Symbols may require up to 5 words in the GOT: an entry
4452 holding the TLS offset for the symbol, and an entry with a full TLS
4453 descriptor taking 4 words. */
4455 static void
4458 bfd_boolean subtract)
4459 {
4462 /* Allocate space for a GOT entry with the TLS offset of the
4463 symbol. */
4470 else
4474 /* If there's any TLSOFF relocation, mark the output file as not
4475 suitable for dlopening. This mark will remain even if we relax
4476 all such relocations, but this is not a problem, since we'll only
4477 do so for executables, and we definitely don't want anyone
4478 dlopening executables. */
4482 /* Allocate space for a TLS descriptor. */
4491 else
4494 }
4496 /* Compute the number of dynamic relocations and fixups that a symbol
4497 requires, and add (or subtract) from the grand and per-symbol
4498 totals. */
4500 static void
4503 bfd_boolean subtract)
4504 {
4508 {
4512 /* In the executable, TLS relocations to symbols that bind
4513 locally (including those that resolve to global TLS offsets)
4514 are resolved immediately, without any need for fixups or
4515 dynamic relocations. In shared libraries, however, we must
4516 emit dynamic relocations even for local symbols, because we
4517 don't know the module id the library is going to get at
4518 run-time, nor its TLS base offset. */
4523 }
4524 else
4525 {
4527 {
4533 }
4534 else
4535 {
4538 }
4542 {
4546 }
4547 else
4549 }
4552 {
4556 }
4563 }
4565 /* Look for opportunities to relax TLS relocations. We can assume
4566 we're linking the main executable or a static-tls library, since
4567 otherwise we wouldn't have got here. When relaxing, we have to
4568 first undo any previous accounting of TLS uses of fixups, dynamic
4569 relocations, GOT and PLT entries. */
4571 static void
4574 bfd_boolean relaxing)
4575 {
4582 {
4584 {
4588 }
4590 /* When linking an executable, we can always decay GOTTLSDESC to
4591 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4592 When linking a static-tls shared library, using TLSMOFF is
4593 not an option, but we can still use GOTTLSOFF. When decaying
4594 to GOTTLSOFF, we must keep the GOT entry in range. We know
4595 it has to fit because we'll be trading the 4 words of hte TLS
4596 descriptor for a single word in the same range. */
4600 {
4604 }
4607 }
4609 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4610 main executable. We have to check whether the symbol's TLSOFF is
4611 in range for a setlos. For symbols with a hash entry, we can
4612 determine exactly what to do; for others locals, we don't have
4613 addresses handy, so we use the size of the TLS section as an
4614 approximation. If we get it wrong, we'll retain a GOT entry
4615 holding the TLS offset (without dynamic relocations or fixups),
4616 but we'll still optimize away the loads from it. Since TLS sizes
4617 are generally very small, it's probably not worth attempting to
4618 do better than this. */
4624 /* The above may hold for an undefweak TLS symbol, so make
4625 sure we don't have this case before accessing def.value
4626 and def.section. */
4638 {
4640 {
4644 }
4648 }
4650 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4651 have a #gottlsoff12 relocation for this entry, or if we can fit
4652 one more in the 12-bit (and 16-bit) ranges. */
4655 || (relaxing
4660 {
4662 {
4666 }
4670 }
4673 {
4676 }
4679 }
4681 /* Compute the total GOT and PLT size required by each symbol in each range. *
4682 Symbols may require up to 4 words in the GOT: an entry pointing to
4683 the symbol, an entry pointing to its function descriptor, and a
4684 private function descriptors taking two words. */
4686 static int
4688 {
4697 else
4698 {
4701 }
4704 }
4706 /* Determine the positive and negative ranges to be used by each
4707 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4708 double-word boundary, are the minimum (negative) and maximum
4709 (positive) GOT offsets already used by previous ranges, except for
4710 an ODD entry that may have been left behind. GOT and FD indicate
4711 the size of GOT entries and function descriptors that must be
4712 placed within the range from -WRAP to WRAP. If there's room left,
4713 up to FDPLT bytes should be reserved for additional function
4714 descriptors. */
4718 bfd_signed_vma fdcur,
4719 bfd_signed_vma odd,
4720 bfd_signed_vma cur,
4721 bfd_vma got,
4722 bfd_vma fd,
4723 bfd_vma fdplt,
4724 bfd_vma tlsd,
4725 bfd_vma tlsdplt,
4726 bfd_vma wrap)
4727 {
4731 /* Start at the given initial points. */
4735 /* If we had an incoming odd word and we have any got entries that
4736 are going to use it, consume it, otherwise leave gad->odd at
4737 zero. We might force gad->odd to zero and return the incoming
4738 odd such that it is used by the next range, but then GOT entries
4739 might appear to be out of order and we wouldn't be able to
4740 shorten the GOT by one word if it turns out to end with an
4741 unpaired GOT entry. */
4743 {
4747 }
4748 else
4751 /* If we're left with an unpaired GOT entry, compute its location
4752 such that we can return it. Otherwise, if got doesn't require an
4753 odd number of words here, either odd was already zero in the
4754 block above, or it was set to zero because got was non-zero, or
4755 got was already zero. In the latter case, we want the value of
4756 odd to carry over to the return statement, so we don't want to
4757 reset odd unless the condition below is true. */
4759 {
4762 }
4764 /* Compute the tentative boundaries of this range. */
4769 /* If function descriptors took too much space, wrap some of them
4770 around. */
4772 {
4775 }
4777 /* If GOT entries took too much space, wrap some of them around.
4778 This may well cause gad->min to become lower than wrapmin. This
4779 will cause a relocation overflow later on, so we don't have to
4780 report it here . */
4782 {
4785 }
4787 /* Add TLS descriptors. */
4792 /* If TLS descriptors took too much space, wrap an integral number
4793 of them around. */
4795 {
4803 }
4805 /* If there is space left and we have function descriptors
4806 referenced in PLT entries that could take advantage of shorter
4807 offsets, place them now. */
4809 {
4810 bfd_vma fds;
4814 else
4821 }
4823 /* If there is more space left, try to place some more function
4824 descriptors for PLT entries. */
4826 {
4827 bfd_vma fds;
4831 else
4838 }
4840 /* If there is space left and we have TLS descriptors referenced in
4841 PLT entries that could take advantage of shorter offsets, place
4842 them now. */
4844 {
4845 bfd_vma tlsds;
4849 else
4855 }
4857 /* If there is more space left, try to place some more TLS
4858 descriptors for PLT entries. Although we could try to fit an
4859 additional TLS descriptor with half of it just before before the
4860 wrap point and another right past the wrap point, this might
4861 cause us to run out of space for the next region, so don't do
4862 it. */
4864 {
4865 bfd_vma tlsds;
4869 else
4875 }
4877 /* If odd was initially computed as an offset past the wrap point,
4878 wrap it around. */
4882 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4883 before returning, so do it here too. This guarantees that,
4884 should cur and fdcur meet at the wrap point, they'll both be
4885 equal to min. */
4889 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4895 }
4897 /* Compute the location of the next GOT entry, given the allocation
4898 data for a range. */
4902 {
4903 bfd_signed_vma ret;
4906 {
4907 /* If there was an odd word left behind, use it. */
4910 }
4911 else
4912 {
4913 /* Otherwise, use the word pointed to by cur, reserve the next
4914 as an odd word, and skip to the next pair of words, possibly
4915 wrapping around. */
4921 }
4924 }
4926 /* Compute the location of the next function descriptor entry in the
4927 GOT, given the allocation data for a range. */
4931 {
4932 /* If we're at the bottom, wrap around, and only then allocate the
4933 next pair of words. */
4937 }
4939 /* Compute the location of the next TLS descriptor entry in the GOT,
4940 given the allocation data for a range. */
4943 {
4944 bfd_signed_vma ret;
4950 /* If we're at the top of the region, wrap around to the bottom. */
4955 }
4957 /* Assign GOT offsets for every GOT entry and function descriptor.
4958 Doing everything in a single pass is tricky. */
4960 static int
4962 {
4983 {
4986 }
4990 {
4993 }
4995 {
4998 }
5012 {
5015 }
5019 {
5022 }
5024 {
5027 }
5032 }
5034 /* Assign GOT offsets to private function descriptors used by PLT
5035 entries (or referenced by 32-bit offsets), as well as PLT entries
5036 and lazy PLT entries. */
5038 static int
5040 {
5048 {
5051 /* We use the section's raw size to mark the location of the
5052 next PLT entry. */
5055 /* Figure out the length of this PLT entry based on the
5056 addressing mode we need to reach the function descriptor. */
5064 else
5068 }
5071 {
5074 /* If this entry is the one that gets the resolver stub, account
5075 for the additional instruction. */
5079 }
5082 {
5085 entry->tlsplt_entry
5091 {
5093 /* FIXME: here we use the size of the TLS section
5094 as an upper bound for the value of the TLS
5095 symbol, because we may not know the exact value
5096 yet. If we get it wrong, we'll just waste a
5097 word in the PLT, and we should never get even
5098 close to 32 KiB of TLS anyway. */
5103 else
5105 }
5107 {
5114 else
5116 }
5117 else
5118 {
5127 else
5129 }
5132 }
5135 }
5137 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5138 _frvfdpic_assign_plt_entries. */
5140 static int
5142 {
5155 }
5157 /* Follow indirect and warning hash entries so that each got entry
5158 points to the final symbol definition. P must point to a pointer
5159 to the hash table we're traversing. Since this traversal may
5160 modify the hash table, we set this pointer to NULL to indicate
5161 we've made a potentially-destructive change to the hash table, so
5162 the traversal must be restarted. */
5163 static int
5165 {
5170 {
5182 NO_INSERT);
5185 {
5186 /* Merge the two entries. */
5190 }
5194 /* If we can't find this entry with the new bfd hash, re-insert
5195 it, and get the traversal restarted. */
5197 {
5202 /* Abort the traversal, since the whole table may have
5203 moved, and leave it up to the parent to restart the
5204 process. */
5207 }
5208 }
5211 }
5213 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5214 section and the rofixup section. Assign locations for GOT and PLT
5215 entries. */
5217 static bfd_boolean
5220 {
5221 bfd_signed_vma odd;
5230 /* Compute the total size taken by entries in the 12-bit and 16-bit
5231 ranges, to tell how many PLT function descriptors we can bring
5232 into the 12-bit range without causing the 16-bit range to
5233 overflow. */
5239 else
5242 {
5245 }
5246 else
5251 /* Determine the ranges of GOT offsets that we can use for each
5252 range of addressing modes. */
5255 odd,
5259 limit,
5261 tlslimit,
5265 odd,
5277 odd,
5290 /* Now assign (most) GOT offsets. */
5292 gpinfop);
5296 /* If an odd word is the last word of the GOT, we don't need this
5297 word to be part of the GOT. */
5303 {
5306 }
5307 /* This will be non-NULL during relaxation. The assumption is that
5308 the size of one of these sections will never grow, only shrink,
5309 so we can use the larger buffer we allocated before. */
5311 {
5317 }
5320 /* Subtract the number of lzplt entries, since those will generate
5321 relocations in the pltrel section. */
5325 else
5330 {
5336 }
5342 {
5348 }
5351 {
5358 {
5364 }
5365 }
5367 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5368 such that there's room for the additional instruction needed to
5369 call the resolver. Since _frvfdpic_assign_got_entries didn't
5370 account for them, our block size is 4 bytes smaller than the real
5371 block size. */
5373 {
5377 }
5379 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5380 actually assign lazy PLT entries addresses. */
5383 /* Save information that we're going to need to generate GOT and PLT
5384 entries. */
5395 /* Allocate a ret statement at plt_initial_offset, to be used by
5396 locally-resolved TLS descriptors. */
5401 gpinfop);
5403 /* Allocate the PLT section contents only after
5404 _frvfdpic_assign_plt_entries has a chance to add the size of the
5405 non-lazy PLT entries. */
5407 {
5411 {
5417 }
5418 }
5421 }
5423 /* Set the sizes of the dynamic sections. */
5425 static bfd_boolean
5428 {
5437 {
5438 /* Set the contents of the .interp section to the interpreter. */
5440 {
5445 }
5446 }
5452 {
5459 }
5464 /* Allocate space to save the summary information, we're going to
5465 use it if we're doing relaxations. */
5472 }
5474 static bfd_boolean
5477 {
5484 }
5486 /* Check whether any of the relocations was optimized away, and
5487 subtract it from the relocation or fixup count. */
5488 static bfd_boolean
5493 {
5507 /* Now examine each relocation. */
5509 {
5527 else
5528 {
5533 }
5539 else
5556 }
5559 }
5561 static bfd_boolean
5565 {
5570 /* Account for relaxation of .eh_frame section. */
5573 {
5577 }
5580 {
5587 /* Clear GOT and PLT assignments. */
5589 _frvfdpic_reset_got_plt_entries,
5590 NULL);
5594 }
5597 }
5599 /* Look for opportunities to relax TLS relocations. We can assume
5600 we're linking the main executable or a static-tls library, since
5601 otherwise we wouldn't have got here. */
5603 static int
5605 {
5612 }
5614 static bfd_boolean
5617 {
5624 /* If we return early, we didn't change anything. */
5627 /* We'll do our thing when requested to relax the GOT section. */
5631 /* We can only relax when linking the main executable or a library
5632 that can't be dlopened. */
5636 /* If there isn't a TLS section for this binary, we can't do
5637 anything about its TLS relocations (it probably doesn't have
5638 any. */
5645 /* Now look for opportunities to relax, adjusting the GOT usage
5646 as needed. */
5648 _frvfdpic_relax_got_plt_entries,
5651 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5654 {
5655 /* Clear GOT and PLT assignments. */
5657 _frvfdpic_reset_got_plt_entries,
5658 NULL);
5660 /* The owner of the TLS section is the output bfd. There should
5661 be a better way to get to it. */
5666 /* Repeat until we don't make any further changes. We could fail to
5667 introduce changes in a round if, for example, the 12-bit range is
5668 full, but we later release some space by getting rid of TLS
5669 descriptors in it. We have to repeat the whole process because
5670 we might have changed the size of a section processed before this
5671 one. */
5673 }
5676 }
5678 /* Fill in code and data in dynamic sections. */
5680 static bfd_boolean
5683 {
5684 /* Nothing to be done for non-FDPIC. */
5686 }
5688 static bfd_boolean
5691 {
5698 {
5700 }
5702 {
5708 {
5720 {
5721 error:
5725 }
5733 {
5734 bfd_vma value =
5743 }
5744 }
5745 }
5747 {
5751 }
5755 {
5767 {
5768 Elf_Internal_Dyn dyn;
5773 {
5795 }
5796 }
5797 }
5800 }
5802 /* Adjust a symbol defined by a dynamic object and referenced by a
5803 regular object. */
5805 static bfd_boolean
5806 elf32_frvfdpic_adjust_dynamic_symbol
5809 {
5814 /* Make sure we know what is going on here. */
5821 /* If this is a weak symbol, and there is a real definition, the
5822 processor independent code will have arranged for us to see the
5823 real definition first, and we can just use the same value. */
5825 {
5831 }
5834 }
5836 /* Perform any actions needed for dynamic symbols. */
5838 static bfd_boolean
5839 elf32_frvfdpic_finish_dynamic_symbol
5844 {
5846 }
5848 /* Decide whether to attempt to turn absptr or lsda encodings in
5849 shared libraries into pcrel within the given input section. */
5851 static bfd_boolean
5852 frvfdpic_elf_use_relative_eh_frame
5856 {
5857 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
5859 }
5861 /* Adjust the contents of an eh_frame_hdr section before they're output. */
5863 static bfd_byte
5869 {
5881 == (_frvfdpic_osec_to_segment
5890 }
5892 /* Look through the relocs for a section during the first phase.
5894 Besides handling virtual table relocs for gc, we have to deal with
5895 all sorts of PIC-related relocations. We describe below the
5896 general plan on how to handle such relocations, even though we only
5897 collect information at this point, storing them in hash tables for
5898 perusal of later passes.
5900 32 relocations are propagated to the linker output when creating
5901 position-independent output. LO16 and HI16 relocations are not
5902 supposed to be encountered in this case.
5904 LABEL16 should always be resolvable by the linker, since it's only
5905 used by branches.
5907 LABEL24, on the other hand, is used by calls. If it turns out that
5908 the target of a call is a dynamic symbol, a PLT entry must be
5909 created for it, which triggers the creation of a private function
5910 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
5912 GPREL relocations require the referenced symbol to be in the same
5913 segment as _gp, but this can only be checked later.
5915 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
5916 exist. LABEL24 might as well, since it may require a PLT entry,
5917 that will require a got.
5919 Non-FUNCDESC GOT relocations require a GOT entry to be created
5920 regardless of whether the symbol is dynamic. However, since a
5921 global symbol that turns out to not be exported may have the same
5922 address of a non-dynamic symbol, we don't assign GOT entries at
5923 this point, such that we can share them in this case. A relocation
5924 for the GOT entry always has to be created, be it to offset a
5925 private symbol by the section load address, be it to get the symbol
5926 resolved dynamically.
5928 FUNCDESC GOT relocations require a GOT entry to be created, and
5929 handled as if a FUNCDESC relocation was applied to the GOT entry in
5930 an object file.
5932 FUNCDESC relocations referencing a symbol that turns out to NOT be
5933 dynamic cause a private function descriptor to be created. The
5934 FUNCDESC relocation then decays to a 32 relocation that points at
5935 the private descriptor. If the symbol is dynamic, the FUNCDESC
5936 relocation is propagated to the linker output, such that the
5937 dynamic linker creates the canonical descriptor, pointing to the
5938 dynamically-resolved definition of the function.
5940 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
5941 symbols that are assigned to the same segment as the GOT, but we
5942 can only check this later, after we know the complete set of
5943 symbols defined and/or exported.
5945 FUNCDESC GOTOFF relocations require a function descriptor to be
5946 created and, unless lazy binding is disabled or the symbol is not
5947 dynamic, a lazy PLT entry. Since we can't tell at this point
5948 whether a symbol is going to be dynamic, we have to decide later
5949 whether to create a lazy PLT entry or bind the descriptor directly
5950 to the private function.
5952 FUNCDESC_VALUE relocations are not supposed to be present in object
5953 files, but they may very well be simply propagated to the linker
5954 output, since they have no side effect.
5957 A function descriptor always requires a FUNCDESC_VALUE relocation.
5958 Whether it's in .plt.rel or not depends on whether lazy binding is
5959 enabled and on whether the referenced symbol is dynamic.
5961 The existence of a lazy PLT requires the resolverStub lazy PLT
5962 entry to be present.
5965 As for assignment of GOT, PLT and lazy PLT entries, and private
5966 descriptors, we might do them all sequentially, but we can do
5967 better than that. For example, we can place GOT entries and
5968 private function descriptors referenced using 12-bit operands
5969 closer to the PIC register value, such that these relocations don't
5970 overflow. Those that are only referenced with LO16 relocations
5971 could come next, but we may as well place PLT-required function
5972 descriptors in the 12-bit range to make them shorter. Symbols
5973 referenced with LO16/HI16 may come next, but we may place
5974 additional function descriptors in the 16-bit range if we can
5975 reliably tell that we've already placed entries that are ever
5976 referenced with only LO16. PLT entries are therefore generated as
5977 small as possible, while not introducing relocation overflows in
5978 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
5979 generated before or after PLT entries, but not intermingled with
5980 them, such that we can have more lazy PLT entries in range for a
5981 branch to the resolverStub. The resolverStub should be emitted at
5982 the most distant location from the first lazy PLT entry such that
5983 it's still in range for a branch, or closer, if there isn't a need
5984 for so many lazy PLT entries. Additional lazy PLT entries may be
5985 emitted after the resolverStub, as long as branches are still in
5986 range. If the branch goes out of range, longer lazy PLT entries
5987 are emitted.
5989 We could further optimize PLT and lazy PLT entries by giving them
5990 priority in assignment to closer-to-gr17 locations depending on the
5991 number of occurrences of references to them (assuming a function
5992 that's called more often is more important for performance, so its
5993 PLT entry should be faster), or taking hints from the compiler.
5994 Given infinite time and money... :-) */
5996 static bfd_boolean
6001 {
6018 {
6025 else
6026 {
6031 }
6034 {
6064 /* Fall through. */
6072 {
6076 }
6078 {
6081 }
6083 {
6086 {
6093 }
6094 picrel
6098 }
6099 else
6110 }
6113 {
6123 /* Fall through. */
6211 /* This relocation describes the C++ object vtable hierarchy.
6212 Reconstruct it for later use during GC. */
6218 /* This relocation describes which C++ vtable entries are actually
6219 used. Record for later use during GC. */
6239 bad_reloc:
6240 /* xgettext:c-format */
6244 }
6245 }
6248 }
6250 \f
6251 /* Return the machine subcode from the ELF e_flags header. */
6253 static int
6255 {
6257 {
6267 }
6270 }
6272 /* Set the right machine number for a FRV ELF file. */
6274 static bfd_boolean
6276 {
6280 }
6281 \f
6282 /* Function to set the ELF flag bits. */
6284 static bfd_boolean
6286 {
6290 }
6292 /* Return true if the architecture described by elf header flag
6293 EXTENSION is an extension of the architecture described by BASE. */
6295 static bfd_boolean
6297 {
6301 /* CPU_GENERIC code can be merged with code for a specific
6302 architecture, in which case the result is marked as being
6303 for the specific architecture. Everything is therefore
6304 an extension of CPU_GENERIC. */
6317 }
6319 /* Merge backend specific data from an object file to the output
6320 object file when linking. */
6322 static bfd_boolean
6324 {
6332 /* FIXME: What should be checked when linking shared libraries? */
6343 #ifdef DEBUG
6344 _bfd_error_handler
6348 #endif
6351 {
6354 }
6357 ;
6360 {
6361 /* Warn if different # of gprs are used. Note, 0 means nothing is
6362 said about the size of gprs. */
6366 ;
6369 ;
6374 else
6375 {
6377 {
6381 }
6384 {
6388 }
6389 }
6391 /* Warn if different # of fprs are used. Note, 0 means nothing is
6392 said about the size of fprs. */
6396 ;
6399 ;
6404 else
6405 {
6407 {
6412 }
6415 {
6420 }
6421 }
6423 /* Warn if different dword support was used. Note, 0 means nothing is
6424 said about the dword support. */
6428 ;
6431 ;
6436 else
6437 {
6439 {
6443 }
6446 {
6450 }
6451 }
6453 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6454 feature is used. */
6456 | EF_FRV_MEDIA
6457 | EF_FRV_MULADD
6460 /* If any module was compiled without -G0, clear the G0 bit. */
6464 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6468 /* We don't have to do anything if the pic flags are the same, or the new
6469 module(s) were compiled with -mlibrary-pic. */
6473 ;
6475 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6476 flags if any from the new module. */
6480 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6484 /* One module was compiled for pic and the other was not, see if we have
6485 had any relocations that are not pic-safe. */
6486 else
6487 {
6490 else
6491 {
6493 #ifndef FRV_NO_PIC_ERROR
6495 _bfd_error_handler
6496 /* xgettext:c-format */
6500 #endif
6501 }
6502 }
6504 /* Warn if different cpu is used (allow a specific cpu to override
6505 the generic cpu). */
6509 ;
6514 else
6515 {
6517 {
6528 }
6531 {
6542 }
6543 }
6545 /* Print out any mismatches from above. */
6547 {
6549 _bfd_error_handler
6550 /* xgettext:c-format */
6553 }
6555 /* Warn about any other mismatches */
6559 {
6562 _bfd_error_handler
6563 /* xgettext:c-format */
6567 }
6568 }
6570 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6574 /* Update the old flags now with changes made above. */
6582 {
6585 _bfd_error_handler
6587 ibfd);
6588 else
6589 _bfd_error_handler
6591 ibfd);
6592 }
6598 }
6600 \f
6601 static bfd_boolean
6603 {
6605 flagword flags;
6609 /* Print normal ELF private data. */
6616 {
6626 }
6629 {
6633 }
6636 {
6641 }
6644 {
6648 }
6679 }
6681 \f
6682 /* Support for core dump NOTE sections. */
6684 static bfd_boolean
6686 {
6691 {
6695 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6696 hardcoded offsets and sizes listed below (and contained within
6697 this lexical block) refer to fields in the target's elf_prstatus
6698 struct. */
6700 /* `pr_cursig' is at offset 12. */
6703 /* `pr_pid' is at offset 24. */
6706 /* `pr_reg' is at offset 72. */
6709 /* Most grok_prstatus implementations set `raw_size' to the size
6710 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6711 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6712 and `pr_interp_fdpic_loadmap', both of which (by design)
6713 immediately follow `pr_reg'. This will allow these fields to
6714 be viewed by GDB as registers.
6716 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6717 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6721 }
6723 /* Make a ".reg/999" section. */
6726 }
6728 static bfd_boolean
6730 {
6732 {
6736 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6739 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6743 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6746 }
6748 /* Note that for some reason, a spurious space is tacked
6749 onto the end of the args in some (at least one anyway)
6750 implementations, so strip it off if it exists. */
6752 {
6758 }
6761 }
6762 #define ELF_ARCH bfd_arch_frv
6763 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6764 #define ELF_MAXPAGESIZE 0x1000
6766 #define TARGET_BIG_SYM frv_elf32_vec
6769 #define elf_info_to_howto frv_info_to_howto_rela
6770 #define elf_backend_relocate_section elf32_frv_relocate_section
6771 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6772 #define elf_backend_check_relocs elf32_frv_check_relocs
6773 #define elf_backend_object_p elf32_frv_object_p
6774 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
6776 #define elf_backend_stack_align 8
6777 #define elf_backend_can_gc_sections 1
6778 #define elf_backend_rela_normal 1
6780 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
6781 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
6782 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
6783 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
6784 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
6786 #define elf_backend_want_got_sym 1
6787 #define elf_backend_got_header_size 0
6788 #define elf_backend_want_got_plt 0
6789 #define elf_backend_plt_readonly 1
6790 #define elf_backend_want_plt_sym 0
6791 #define elf_backend_plt_header_size 0
6793 #define elf_backend_finish_dynamic_sections \
6794 elf32_frv_finish_dynamic_sections
6796 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
6797 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
6799 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
6803 #undef ELF_TARGET_ID
6804 #define ELF_TARGET_ID FRV_ELF_DATA
6805 #undef ELF_MAXPAGESIZE
6806 #define ELF_MAXPAGESIZE 0x4000
6808 #undef TARGET_BIG_SYM
6809 #define TARGET_BIG_SYM frv_elf32_fdpic_vec
6810 #undef TARGET_BIG_NAME
6812 #undef elf32_bed
6813 #define elf32_bed elf32_frvfdpic_bed
6815 #undef elf_info_to_howto_rel
6816 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
6818 #undef bfd_elf32_bfd_link_hash_table_create
6819 #define bfd_elf32_bfd_link_hash_table_create \
6820 frvfdpic_elf_link_hash_table_create
6821 #undef elf_backend_always_size_sections
6822 #define elf_backend_always_size_sections \
6823 elf32_frvfdpic_always_size_sections
6825 #undef elf_backend_create_dynamic_sections
6826 #define elf_backend_create_dynamic_sections \
6827 elf32_frvfdpic_create_dynamic_sections
6828 #undef elf_backend_adjust_dynamic_symbol
6829 #define elf_backend_adjust_dynamic_symbol \
6830 elf32_frvfdpic_adjust_dynamic_symbol
6831 #undef elf_backend_size_dynamic_sections
6832 #define elf_backend_size_dynamic_sections \
6833 elf32_frvfdpic_size_dynamic_sections
6834 #undef bfd_elf32_bfd_relax_section
6835 #define bfd_elf32_bfd_relax_section \
6836 elf32_frvfdpic_relax_section
6837 #undef elf_backend_finish_dynamic_symbol
6838 #define elf_backend_finish_dynamic_symbol \
6839 elf32_frvfdpic_finish_dynamic_symbol
6840 #undef elf_backend_finish_dynamic_sections
6841 #define elf_backend_finish_dynamic_sections \
6842 elf32_frvfdpic_finish_dynamic_sections
6844 #undef elf_backend_discard_info
6845 #define elf_backend_discard_info \
6846 frvfdpic_elf_discard_info
6847 #undef elf_backend_can_make_relative_eh_frame
6848 #define elf_backend_can_make_relative_eh_frame \
6849 frvfdpic_elf_use_relative_eh_frame
6850 #undef elf_backend_can_make_lsda_relative_eh_frame
6851 #define elf_backend_can_make_lsda_relative_eh_frame \
6852 frvfdpic_elf_use_relative_eh_frame
6853 #undef elf_backend_encode_eh_address
6854 #define elf_backend_encode_eh_address \
6855 frvfdpic_elf_encode_eh_address
6857 #undef elf_backend_may_use_rel_p
6858 #define elf_backend_may_use_rel_p 1
6859 #undef elf_backend_may_use_rela_p
6860 #define elf_backend_may_use_rela_p 1
6861 /* We use REL for dynamic relocations only. */
6862 #undef elf_backend_default_use_rela_p
6863 #define elf_backend_default_use_rela_p 1
6865 #undef elf_backend_omit_section_dynsym
6866 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym