| blob | 46f299b7ab2220c37e82bdba2feb31db505bae2a |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright (C) 2002-2014 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. */
29 /* Forward declarations. */
33 {
34 /* This reloc does nothing. */
49 /* A 32 bit absolute relocation. */
64 /* A 16 bit pc-relative relocation. */
79 /* A 24-bit pc-relative relocation. */
192 /* A 12-bit signed operand with the GOT offset for the address of
193 the symbol. */
208 /* The upper 16 bits of the GOT offset for the address of the
209 symbol. */
224 /* The lower 16 bits of the GOT offset for the address of the
225 symbol. */
240 /* The 32-bit address of the canonical descriptor of a function. */
255 /* A 12-bit signed operand with the GOT offset for the address of
256 canonical descriptor of a function. */
271 /* The upper 16 bits of the GOT offset for the address of the
272 canonical descriptor of a function. */
287 /* The lower 16 bits of the GOT offset for the address of the
288 canonical descriptor of a function. */
303 /* The 64-bit descriptor of a function. */
318 /* A 12-bit signed operand with the GOT offset for the address of
319 canonical descriptor of a function. */
334 /* The upper 16 bits of the GOT offset for the address of the
335 canonical descriptor of a function. */
350 /* The lower 16 bits of the GOT offset for the address of the
351 canonical descriptor of a function. */
366 /* A 12-bit signed operand with the GOT offset for the address of
367 the symbol. */
382 /* The upper 16 bits of the GOT offset for the address of the
383 symbol. */
398 /* The lower 16 bits of the GOT offset for the address of the
399 symbol. */
414 /* A 24-bit pc-relative relocation referencing the TLS PLT entry for
415 a thread-local symbol. If the symbol number is 0, it refers to
416 the module. */
431 /* A 64-bit TLS descriptor for a symbol. This relocation is only
432 valid as a REL, dynamic relocation. */
447 /* A 12-bit signed operand with the GOT offset for the TLS
448 descriptor of the symbol. */
463 /* The upper 16 bits of the GOT offset for the TLS descriptor of the
464 symbol. */
479 /* The lower 16 bits of the GOT offset for the TLS descriptor of the
480 symbol. */
495 /* A 12-bit signed operand with the offset from the module base
496 address to the thread-local symbol address. */
511 /* The upper 16 bits of the offset from the module base address to
512 the thread-local symbol address. */
527 /* The lower 16 bits of the offset from the module base address to
528 the thread-local symbol address. */
543 /* A 12-bit signed operand with the GOT offset for the TLSOFF entry
544 for a symbol. */
559 /* The upper 16 bits of the GOT offset for the TLSOFF entry for a
560 symbol. */
575 /* The lower 16 bits of the GOT offset for the TLSOFF entry for a
576 symbol. */
591 /* The 32-bit offset from the thread pointer (not the module base
592 address) to a thread-local symbol. */
607 /* An annotation for linker relaxation, that denotes the
608 symbol+addend whose TLS descriptor is referenced by the sum of
609 the two input registers of an ldd instruction. */
624 /* An annotation for linker relaxation, that denotes the
625 symbol+addend whose TLS resolver entry point is given by the sum
626 of the two register operands of an calll instruction. */
641 /* An annotation for linker relaxation, that denotes the
642 symbol+addend whose TLS offset GOT entry is given by the sum of
643 the two input registers of an ld instruction. */
658 /* A 32-bit offset from the module base address to
659 the thread-local symbol address. */
673 };
675 /* GNU extension to record C++ vtable hierarchy. */
691 /* GNU extension to record C++ vtable member usage. */
707 /* The following 3 relocations are REL. The only difference to the
708 entries in the table above are that partial_inplace is TRUE. */
755 /* A 64-bit TLS descriptor for a symbol. The first word resolves to
756 an entry point, and the second resolves to a special argument.
757 If the symbol turns out to be in static TLS, the entry point is a
758 return instruction, and the special argument is the TLS offset
759 for the symbol. If it's in dynamic TLS, the entry point is a TLS
760 offset resolver, and the special argument is a pointer to a data
761 structure allocated by the dynamic loader, containing the GOT
762 address for the offset resolver, the module id, the offset within
763 the module, and anything else the TLS offset resolver might need
764 to determine the TLS offset for the symbol in the running
765 thread. */
781 /* The 32-bit offset from the thread pointer (not the module base
782 address) to a thread-local symbol. */
798 \f
800 #define IS_FDPIC(bfd) ((bfd)->xvec == &frv_elf32_fdpic_vec)
802 /* An extension of the elf hash table data structure, containing some
803 additional FRV-specific data. */
804 struct frvfdpic_elf_link_hash_table
805 {
808 /* A pointer to the .got section. */
810 /* A pointer to the .rel.got section. */
812 /* A pointer to the .rofixup section. */
814 /* A pointer to the .plt section. */
816 /* A pointer to the .rel.plt section. */
818 /* GOT base offset. */
819 bfd_vma got0;
820 /* Location of the first non-lazy PLT entry, i.e., the number of
821 bytes taken by lazy PLT entries. If locally-bound TLS
822 descriptors require a ret instruction, it will be placed at this
823 offset. */
824 bfd_vma plt0;
825 /* A hash table holding information about which symbols were
826 referenced with which PIC-related relocations. */
828 /* Summary reloc information collected by
829 _frvfdpic_count_got_plt_entries. */
831 };
833 /* Get the FRV ELF linker hash table from a link_info structure. */
835 #define frvfdpic_hash_table(p) \
836 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
837 == FRV_ELF_DATA ? ((struct frvfdpic_elf_link_hash_table *) ((p)->hash)) : NULL)
839 #define frvfdpic_got_section(info) \
840 (frvfdpic_hash_table (info)->sgot)
841 #define frvfdpic_gotrel_section(info) \
842 (frvfdpic_hash_table (info)->sgotrel)
843 #define frvfdpic_gotfixup_section(info) \
844 (frvfdpic_hash_table (info)->sgotfixup)
845 #define frvfdpic_plt_section(info) \
846 (frvfdpic_hash_table (info)->splt)
847 #define frvfdpic_pltrel_section(info) \
848 (frvfdpic_hash_table (info)->spltrel)
849 #define frvfdpic_relocs_info(info) \
850 (frvfdpic_hash_table (info)->relocs_info)
851 #define frvfdpic_got_initial_offset(info) \
852 (frvfdpic_hash_table (info)->got0)
853 #define frvfdpic_plt_initial_offset(info) \
854 (frvfdpic_hash_table (info)->plt0)
855 #define frvfdpic_dynamic_got_plt_info(info) \
856 (frvfdpic_hash_table (info)->g)
858 /* Currently it's the same, but if some day we have a reason to change
859 it, we'd better be using a different macro.
861 FIXME: if there's any TLS PLT entry that uses local-exec or
862 initial-exec models, we could use the ret at the end of any of them
863 instead of adding one more. */
864 #define frvfdpic_plt_tls_ret_offset(info) \
865 (frvfdpic_plt_initial_offset (info))
867 /* The name of the dynamic interpreter. This is put in the .interp
868 section. */
872 #define DEFAULT_STACK_SIZE 0x20000
874 /* This structure is used to collect the number of entries present in
875 each addressable range of the got. */
876 struct _frvfdpic_dynamic_got_info
877 {
878 /* Several bits of information about the current link. */
880 /* Total GOT size needed for GOT entries within the 12-, 16- or 32-bit
881 ranges. */
883 /* Total GOT size needed for function descriptor entries within the 12-,
884 16- or 32-bit ranges. */
886 /* Total GOT size needed by function descriptor entries referenced
887 in PLT entries, that would be profitable to place in offsets
888 close to the PIC register. */
889 bfd_vma fdplt;
890 /* Total PLT size needed by lazy PLT entries. */
891 bfd_vma lzplt;
892 /* Total GOT size needed for TLS descriptor entries within the 12-,
893 16- or 32-bit ranges. */
895 /* Total GOT size needed by TLS descriptors referenced in PLT
896 entries, that would be profitable to place in offers close to the
897 PIC register. */
898 bfd_vma tlsdplt;
899 /* Total PLT size needed by TLS lazy PLT entries. */
900 bfd_vma tlslzplt;
901 /* Number of relocations carried over from input object files. */
903 /* Number of fixups introduced by relocations in input object files. */
905 /* The number of fixups that reference the ret instruction added to
906 the PLT for locally-resolved TLS descriptors. */
908 };
910 /* This structure is used to assign offsets to got entries, function
911 descriptors, plt entries and lazy plt entries. */
913 struct _frvfdpic_dynamic_got_plt_info
914 {
915 /* Summary information collected with _frvfdpic_count_got_plt_entries. */
918 /* For each addressable range, we record a MAX (positive) and MIN
919 (negative) value. CUR is used to assign got entries, and it's
920 incremented from an initial positive value to MAX, then from MIN
921 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
922 assign function descriptors, and it's decreased from an initial
923 non-positive value to MIN, then from MAX down to CUR (unless CUR
924 wraps around first). All of MIN, MAX, CUR and FDCUR always point
925 to even words. ODD, if non-zero, indicates an odd word to be
926 used for the next got entry, otherwise CUR is used and
927 incremented by a pair of words, wrapping around when it reaches
928 MAX. FDCUR is decremented (and wrapped) before the next function
929 descriptor is chosen. FDPLT indicates the number of remaining
930 slots that can be used for function descriptors used only by PLT
931 entries.
933 TMAX, TMIN and TCUR are used to assign TLS descriptors. TCUR
934 starts as MAX, and grows up to TMAX, then wraps around to TMIN
935 and grows up to MIN. TLSDPLT indicates the number of remaining
936 slots that can be used for TLS descriptors used only by TLS PLT
937 entries. */
938 struct _frvfdpic_dynamic_got_alloc_data
939 {
944 };
946 /* Create an FRV ELF linker hash table. */
950 {
959 _bfd_elf_link_hash_newfunc,
961 FRV_ELF_DATA))
962 {
965 }
968 }
970 /* Decide whether a reference to a symbol can be resolved locally or
971 not. If the symbol is protected, we want the local address, but
972 its function descriptor must be assigned by the dynamic linker. */
973 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
974 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
975 || ! elf_hash_table (INFO)->dynamic_sections_created)
976 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
977 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
979 /* This structure collects information on what kind of GOT, PLT or
980 function descriptors are required by relocations that reference a
981 certain symbol. */
982 struct frvfdpic_relocs_info
983 {
984 /* The index of the symbol, as stored in the relocation r_info, if
985 we have a local symbol; -1 otherwise. */
987 union
988 {
989 /* The input bfd in which the symbol is defined, if it's a local
990 symbol. */
992 /* If symndx == -1, the hash table entry corresponding to a global
993 symbol (even if it turns out to bind locally, in which case it
994 should ideally be replaced with section's symndx + addend). */
997 /* The addend of the relocation that references the symbol. */
998 bfd_vma addend;
1000 /* The fields above are used to identify an entry. The fields below
1001 contain information on how an entry is used and, later on, which
1002 locations it was assigned. */
1003 /* The following 3 fields record whether the symbol+addend above was
1004 ever referenced with a GOT relocation. The 12 suffix indicates a
1005 GOT12 relocation; los is used for GOTLO relocations that are not
1006 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1007 pairs. */
1011 /* Whether a FUNCDESC relocation references symbol+addend. */
1013 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1017 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1021 /* Whether a GETTLSOFF relocation references symbol+addend. */
1023 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1024 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1025 We might instead just pre-compute flags telling whether the
1026 object is suitable for local exec, initial exec or general
1027 dynamic addressing, and use that all over the place. We could
1028 also try to do a better job of merging TLSOFF and TLSDESC entries
1029 in main executables, but perhaps we can get rid of TLSDESC
1030 entirely in them instead. */
1031 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1035 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1039 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1040 GOTOFFHI relocations. The addend doesn't really matter, since we
1041 envision that this will only be used to check whether the symbol
1042 is mapped to the same segment as the got. */
1044 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1046 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1047 relocation. */
1049 /* Whether we need a PLT entry for a symbol. Should be implied by
1050 something like:
1051 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1053 /* Whether a function descriptor should be created in this link unit
1054 for symbol+addend. Should be implied by something like:
1055 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1056 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1057 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1059 /* Whether a lazy PLT entry is needed for this symbol+addend.
1060 Should be implied by something like:
1061 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1062 && ! (info->flags & DF_BIND_NOW)) */
1064 /* Whether we've already emitted GOT relocations and PLT entries as
1065 needed for this symbol. */
1068 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1069 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1070 symbol+addend. */
1073 /* The number of .rofixups entries and dynamic relocations allocated
1074 for this symbol, minus any that might have already been used. */
1077 /* The offsets of the GOT entries assigned to symbol+addend, to the
1078 function descriptor's address, and to a function descriptor,
1079 respectively. Should be zero if unassigned. The offsets are
1080 counted from the value that will be assigned to the PIC register,
1081 not from the beginning of the .got section. */
1083 /* The offsets of the PLT entries assigned to symbol+addend,
1084 non-lazy and lazy, respectively. If unassigned, should be
1085 (bfd_vma)-1. */
1087 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1089 /* The offset of the TLS offset PLT entry. */
1090 bfd_vma tlsplt_entry;
1091 };
1093 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1094 static hashval_t
1096 {
1102 }
1104 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1105 identical. */
1106 static int
1108 {
1114 }
1116 /* Find or create an entry in a hash table HT that matches the key
1117 fields of the given ENTRY. If it's not found, memory for a new
1118 entry is allocated in ABFD's obstack. */
1124 {
1147 }
1149 /* Obtain the address of the entry in HT associated with H's symbol +
1150 addend, creating a new entry if none existed. ABFD is only used
1151 for memory allocation purposes. */
1156 bfd_vma addend,
1158 {
1166 }
1168 /* Obtain the address of the entry in HT associated with the SYMNDXth
1169 local symbol of the input bfd ABFD, plus the addend, creating a new
1170 entry if none existed. */
1175 bfd_vma addend,
1177 {
1185 }
1187 /* Merge fields set by check_relocs() of two entries that end up being
1188 mapped to the same (presumably global) symbol. */
1193 {
1214 }
1216 /* Every block of 65535 lazy PLT entries shares a single call to the
1217 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1218 32767, counting from 0). All other lazy PLT entries branch to it
1219 in a single instruction. */
1221 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1222 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1224 /* Add a dynamic relocation to the SRELOC section. */
1230 {
1231 Elf_Internal_Rela outrel;
1232 bfd_vma reloc_offset;
1244 /* If the entry's index is zero, this relocation was probably to a
1245 linkonce section that got discarded. We reserved a dynamic
1246 relocation, but it was for another entry than the one we got at
1247 the time of emitting the relocation. Unfortunately there's no
1248 simple way for us to catch this situation, since the relocation
1249 is cleared right before calling relocate_section, at which point
1250 we no longer know what the relocation used to point to. */
1252 {
1255 }
1258 }
1260 /* Add a fixup to the ROFIXUP section. */
1262 static bfd_vma
1265 {
1266 bfd_vma fixup_offset;
1273 {
1276 }
1280 {
1281 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1282 above. */
1285 }
1288 }
1290 /* Find the segment number in which OSEC, and output section, is
1291 located. */
1293 static unsigned
1295 {
1299 }
1303 {
1307 }
1309 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1311 /* Return the base VMA address which should be subtracted from real addresses
1312 when resolving TLSMOFF relocation.
1313 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1315 static bfd_vma
1317 {
1318 /* If tls_sec is NULL, we should have signalled an error already. */
1322 }
1324 /* Generate relocations for GOT entries, function descriptors, and
1325 code for PLT and lazy PLT entries. */
1333 bfd_vma addend)
1335 {
1345 {
1346 /* If the symbol is dynamic, consider it for dynamic
1347 relocations, otherwise decay to section + offset. */
1350 else
1351 {
1357 else
1359 }
1360 }
1362 /* Generate relocation for GOT entry pointing to the symbol. */
1364 {
1368 /* If the symbol is dynamic but binds locally, use
1369 section+offset. */
1372 {
1375 else
1380 else
1382 }
1384 /* If we're linking an executable at a fixed address, we can
1385 omit the dynamic relocation as long as the symbol is local to
1386 this module. */
1390 {
1398 ->vma
1402 }
1403 else
1405 _bfd_elf_section_offset
1419 }
1421 /* Generate relocation for GOT entry pointing to a canonical
1422 function descriptor. */
1424 {
1431 {
1432 /* If the symbol is dynamic and there may be dynamic symbol
1433 resolution because we are, or are linked with, a shared
1434 library, emit a FUNCDESC relocation such that the dynamic
1435 linker will allocate the function descriptor. If the
1436 symbol needs a non-local function descriptor but binds
1437 locally (e.g., its visibility is protected, emit a
1438 dynamic relocation decayed to section+offset. */
1443 {
1449 }
1452 {
1457 {
1464 }
1465 }
1466 else
1467 {
1468 /* Otherwise, we know we have a private function descriptor,
1469 so reference it directly. */
1477 }
1479 /* If there is room for dynamic symbol resolution, emit the
1480 dynamic relocation. However, if we're linking an
1481 executable at a fixed location, we won't have emitted a
1482 dynamic symbol entry for the got section, so idx will be
1483 zero, which means we can and should compute the address
1484 of the private descriptor ourselves. */
1488 {
1495 ->output_offset
1498 }
1499 else
1502 _bfd_elf_section_offset
1512 }
1518 }
1520 /* Generate relocation to fill in a private function descriptor in
1521 the GOT. */
1523 {
1526 bfd_vma ofst;
1529 /* If the symbol is dynamic but binds locally, use
1530 section+offset. */
1533 {
1536 else
1541 else
1543 }
1545 /* If we're linking an executable at a fixed address, we can
1546 omit the dynamic relocation as long as the symbol is local to
1547 this module. */
1550 {
1556 {
1562 ->output_offset
1570 ->output_offset
1573 }
1574 }
1575 else
1576 {
1577 ofst =
1579 entry->lazyplt
1582 _bfd_elf_section_offset
1592 }
1594 /* If we've omitted the dynamic relocation, just emit the fixed
1595 addresses of the symbol and of the local GOT base offset. */
1597 {
1602 }
1604 {
1606 {
1613 }
1617 /* A function descriptor used for lazy or local resolving is
1618 initialized such that its high word contains the output
1619 section index in which the PLT entries are located, and
1620 the low word contains the address of the lazy PLT entry
1621 entry point, that must be within the memory region
1622 assigned to that section. */
1626 highword = _frvfdpic_osec_to_segment
1628 }
1629 else
1630 {
1631 /* A function descriptor for a local function gets the index
1632 of the section. For a non-local function, it's
1633 disregarded. */
1639 else
1640 highword = _frvfdpic_osec_to_segment
1642 }
1652 }
1654 /* Generate code for the PLT entry. */
1656 {
1662 /* Figure out what kind of PLT entry we need, depending on the
1663 location of the function descriptor within the GOT. */
1666 {
1667 /* lddi @(gr15, fd_entry), gr14 */
1670 plt_code);
1672 }
1673 else
1674 {
1677 {
1678 /* setlos lo(fd_entry), gr14 */
1680 0x9cfc0000
1682 plt_code);
1684 }
1685 else
1686 {
1687 /* sethi.p hi(fd_entry), gr14
1688 setlo lo(fd_entry), gr14 */
1690 0x1cf80000
1693 plt_code);
1696 0x9cf40000
1698 plt_code);
1700 }
1701 /* ldd @(gr14,gr15),gr14 */
1704 }
1705 /* jmpl @(gr14,gr0) */
1707 }
1709 /* Generate code for the lazy PLT entry. */
1711 {
1714 bfd_vma resolverStub_addr;
1725 {
1726 /* This is a lazy PLT entry that includes a resolver call. */
1727 /* ldd @(gr15,gr0), gr4
1728 jmpl @(gr4,gr0) */
1731 }
1732 else
1733 {
1734 /* bra resolverStub */
1736 0xc01a0000
1739 lzplt_code);
1740 }
1741 }
1743 /* Generate relocation for GOT entry holding the TLS offset. */
1745 {
1751 {
1752 /* If the symbol is dynamic but binds locally, use
1753 section+offset. */
1755 {
1758 else
1764 else
1766 }
1767 }
1769 /* *ABS*+addend is special for TLS relocations, use only the
1770 addend. */
1775 ;
1776 /* If we're linking an executable, we can entirely omit the
1777 dynamic relocation if the symbol is local to this module. */
1781 {
1784 }
1785 else
1786 {
1790 {
1792 {
1797 }
1800 }
1802 _bfd_elf_section_offset
1812 }
1818 }
1821 {
1825 /* If the symbol is dynamic but binds locally, use
1826 section+offset. */
1829 {
1832 else
1837 else
1839 }
1841 /* If we didn't set up a TLS offset entry, but we're linking an
1842 executable and the symbol binds locally, we can use the
1843 module offset in the TLS descriptor in relaxations. */
1853 {
1854 /* *ABS*+addend is special for TLS relocations, use only the
1855 addend for the TLS offset, and take the module id as
1856 0. */
1860 ;
1861 /* For other TLS symbols that bind locally, add the section
1862 TLS offset to the addend. */
1879 ->output_offset
1885 /* We've used one of the reserved fixups, so discount it so
1886 that we can check at the end that we've used them
1887 all. */
1890 /* While at that, make sure the ret instruction makes to the
1891 right location in the PLT. We could do it only when we
1892 got to 0, but since the check at the end will only print
1893 a warning, make sure we have the ret in place in case the
1894 warning is missed. */
1898 }
1899 else
1900 {
1904 {
1906 {
1911 }
1914 }
1917 _bfd_elf_section_offset
1932 }
1938 }
1940 /* Generate code for the get-TLS-offset PLT entry. */
1942 {
1949 {
1953 /* sec may be NULL when referencing an undefweak symbol
1954 while linking a static executable. */
1956 {
1959 }
1960 else
1961 {
1964 else
1970 else
1972 }
1974 /* *ABS*+addend is special for TLS relocations, use only the
1975 addend for the TLS offset, and take the module id as
1976 0. */
1980 ;
1981 /* For other TLS symbols that bind locally, add the section
1982 TLS offset to the addend. */
1988 {
1989 /* setlos lo(ad), gr9 */
1991 0x92fc0000
1992 | (ad
1994 plt_code);
1996 }
1997 else
1998 {
1999 /* sethi.p hi(ad), gr9
2000 setlo lo(ad), gr9 */
2002 0x12f80000
2005 plt_code);
2008 0x92f40000
2009 | (ad
2011 plt_code);
2013 }
2014 /* ret */
2016 }
2018 {
2019 /* Figure out what kind of PLT entry we need, depending on the
2020 location of the TLS descriptor within the GOT. */
2023 {
2024 /* ldi @(gr15, tlsoff_entry), gr9 */
2028 plt_code);
2030 }
2031 else
2032 {
2035 {
2036 /* setlos lo(tlsoff_entry), gr8 */
2038 0x90fc0000
2041 plt_code);
2043 }
2044 else
2045 {
2046 /* sethi.p hi(tlsoff_entry), gr8
2047 setlo lo(tlsoff_entry), gr8 */
2049 0x10f80000
2052 plt_code);
2055 0x90f40000
2058 plt_code);
2060 }
2061 /* ld @(gr15,gr8),gr9 */
2064 }
2065 /* ret */
2067 }
2068 else
2069 {
2072 /* Figure out what kind of PLT entry we need, depending on the
2073 location of the TLS descriptor within the GOT. */
2076 {
2077 /* lddi @(gr15, tlsdesc_entry), gr8 */
2081 plt_code);
2083 }
2084 else
2085 {
2088 {
2089 /* setlos lo(tlsdesc_entry), gr8 */
2091 0x90fc0000
2094 plt_code);
2096 }
2097 else
2098 {
2099 /* sethi.p hi(tlsdesc_entry), gr8
2100 setlo lo(tlsdesc_entry), gr8 */
2102 0x10f80000
2105 plt_code);
2108 0x90f40000
2111 plt_code);
2113 }
2114 /* ldd @(gr15,gr8),gr8 */
2117 }
2118 /* jmpl @(gr8,gr0) */
2120 }
2121 }
2124 }
2126 /* Handle an FRV small data reloc. */
2128 static bfd_reloc_status_type
2134 bfd_vma value)
2135 {
2136 bfd_vma insn;
2137 bfd_vma gp;
2161 }
2163 /* Handle an FRV small data reloc. for the u12 field. */
2165 static bfd_reloc_status_type
2171 bfd_vma value)
2172 {
2173 bfd_vma insn;
2174 bfd_vma gp;
2176 bfd_vma mask;
2194 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2201 }
2203 /* Handle an FRV ELF HI16 reloc. */
2205 static bfd_reloc_status_type
2209 bfd_vma value)
2210 {
2211 bfd_vma insn;
2226 }
2227 static bfd_reloc_status_type
2231 bfd_vma value)
2232 {
2233 bfd_vma insn;
2247 }
2249 /* Perform the relocation for the CALL label24 instruction. */
2251 static bfd_reloc_status_type
2256 bfd_vma value)
2257 {
2258 bfd_vma insn;
2259 bfd_vma label6;
2260 bfd_vma label18;
2262 /* The format for the call instruction is:
2264 0 000000 0001111 000000000000000000
2265 label6 opcode label18
2267 The branch calculation is: pc + (4*label24)
2268 where label24 is the concatenation of label6 and label18. */
2270 /* Grab the instruction. */
2291 }
2293 static bfd_reloc_status_type
2299 bfd_vma value)
2300 {
2301 bfd_vma insn;
2302 bfd_vma gp;
2324 }
2326 static bfd_reloc_status_type
2332 bfd_vma value)
2333 {
2334 bfd_vma insn;
2335 bfd_vma gp;
2358 }
2362 bfd_reloc_code_real_type code)
2363 {
2365 {
2376 /* Fall through. */
2514 }
2517 }
2521 {
2526 i++)
2537 }
2539 /* Set the howto pointer for an FRV ELF reloc. */
2541 static void
2545 {
2550 {
2562 }
2563 }
2565 /* Set the howto pointer for an FRV ELF REL reloc. */
2566 static void
2569 {
2574 {
2598 }
2599 }
2600 \f
2601 /* Perform a single relocation. By default we use the standard BFD
2602 routines, but a few relocs, we have to do them ourselves. */
2604 static bfd_reloc_status_type
2610 bfd_vma relocation)
2611 {
2615 }
2617 \f
2618 /* Relocate an FRV ELF section.
2620 The RELOCATE_SECTION function is called by the new ELF backend linker
2621 to handle the relocations for a section.
2623 The relocs are always passed as Rela structures; if the section
2624 actually uses Rel structures, the r_addend field will always be
2625 zero.
2627 This function is responsible for adjusting the section contents as
2628 necessary, and (if using Rela relocs and generating a relocatable
2629 output file) adjusting the reloc addend as necessary.
2631 This function does not have to worry about setting the reloc
2632 address or the reloc symbol index.
2634 LOCAL_SYMS is a pointer to the swapped in local symbols.
2636 LOCAL_SECTIONS is an array giving the section in the input file
2637 corresponding to the st_shndx field of each local symbol.
2639 The global hash table entry for the global symbols can be found
2640 via elf_sym_hashes (input_bfd).
2642 When generating relocatable output, this function must handle
2643 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2644 going to be the section symbol corresponding to the output
2645 section, which means that the addend must be adjusted
2646 accordingly. */
2648 static bfd_boolean
2657 {
2677 else
2683 else
2689 else
2694 else
2698 {
2704 bfd_vma relocation;
2705 bfd_reloc_status_type r;
2725 {
2730 name = bfd_elf_string_from_elf_section
2734 }
2735 else
2736 {
2738 bfd_boolean unresolved_reloc;
2746 }
2760 {
2763 }
2766 {
2806 else
2807 /* In order to find the entry we created before, we must
2808 use the original addend, not the one that may have been
2809 modified by _bfd_elf_rela_local_sym(). */
2819 {
2825 }
2830 non_fdpic:
2836 {
2842 }
2844 }
2847 {
2870 }
2872 /* Try to apply TLS relaxations. */
2875 {
2877 #define LOCAL_EXEC_P(info, picrel) \
2878 ((info)->executable \
2879 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2880 #define INITIAL_EXEC_P(info, picrel) \
2881 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2882 && (picrel)->tlsoff_entry)
2884 #define IN_RANGE_FOR_OFST12_P(value) \
2885 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2886 #define IN_RANGE_FOR_SETLOS_P(value) \
2887 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2888 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2889 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2891 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2892 (LOCAL_EXEC_P ((info), (picrel)) \
2893 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2894 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2895 (INITIAL_EXEC_P ((info), (picrel)) \
2896 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2898 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2899 (LOCAL_EXEC_P ((info), (picrel)))
2900 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2901 (INITIAL_EXEC_P ((info), (picrel)))
2903 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2904 (LOCAL_EXEC_P ((info), (picrel)) \
2905 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2910 /* Is this a call instruction? */
2912 {
2917 }
2921 {
2922 /* Replace the call instruction (except the packing bit)
2923 with setlos #tlsmofflo(symbol+offset), gr9. */
2931 }
2934 {
2935 /* Replace the call instruction (except the packing bit)
2936 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
2944 }
2951 /* Is this an lddi instruction? */
2953 {
2959 }
2964 info))
2965 {
2966 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
2967 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
2968 Preserve the packing bit. */
2978 }
2982 {
2983 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
2984 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
2985 Preserve the packing bit. */
2995 }
2998 {
2999 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3000 with ldi @(grB, #gottlsoff12(symbol+offset),
3001 gr<C+1>. Preserve the packing bit. If gottlsoff12
3002 overflows, we'll error out, but that's sort-of ok,
3003 since we'd started with gottlsdesc12, that's actually
3004 more demanding. Compiling with -fPIE instead of
3005 -fpie would fix it; linking with --relax should fix
3006 it as well. */
3015 }
3022 /* Is this a sethi instruction? */
3024 {
3030 }
3036 {
3037 /* Replace sethi with a nop. Preserve the packing bit. */
3042 /* Nothing to relocate. */
3044 }
3047 {
3048 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3052 }
3059 /* Is this a setlo or setlos instruction? */
3061 {
3067 }
3073 {
3074 /* Replace setlo/setlos with a nop. Preserve the
3075 packing bit. */
3080 /* Nothing to relocate. */
3082 }
3085 {
3086 /* If the corresponding sethi (if it exists) decayed
3087 to a nop, make sure this becomes (or already is) a
3088 setlos, not setlo. */
3090 {
3093 }
3095 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3099 }
3106 /* Is this an ldd instruction? */
3108 {
3114 }
3119 info))
3120 {
3121 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3122 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3123 Preserve the packing bit. */
3133 }
3137 {
3138 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3139 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3140 Preserve the packing bit. */
3150 }
3154 {
3155 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3156 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3157 Preserve the packing bit. */
3167 }
3170 {
3171 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3172 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3173 Preserve the packing bit. */
3179 /* #tlsoff(symbol+offset) is just a relaxation
3180 annotation, so there's nothing left to
3181 relocate. */
3183 }
3190 /* Is this a calll or callil instruction? */
3192 {
3198 }
3203 info))
3204 {
3205 /* Replace calll with a nop. Preserve the packing bit. */
3210 /* Nothing to relocate. */
3212 }
3216 {
3217 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3218 Preserve the packing bit. */
3226 }
3229 {
3230 /* Replace calll with a nop. Preserve the packing bit. */
3235 /* Nothing to relocate. */
3237 }
3244 /* Is this an ldi instruction? */
3246 {
3252 }
3256 {
3257 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3258 with setlos #tlsmofflo(symbol+offset), grC.
3259 Preserve the packing bit. */
3267 }
3274 /* Is this a sethi instruction? */
3276 {
3282 }
3288 {
3289 /* Replace sethi with a nop. Preserve the packing bit. */
3294 /* Nothing to relocate. */
3296 }
3303 /* Is this a setlo or setlos instruction? */
3305 {
3311 }
3317 {
3318 /* Replace setlo/setlos with a nop. Preserve the
3319 packing bit. */
3324 /* Nothing to relocate. */
3326 }
3333 /* Is this an ld instruction? */
3335 {
3341 }
3345 {
3346 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3347 with setlos #tlsmofflo(symbol+offset), grC.
3348 Preserve the packing bit. */
3356 }
3360 {
3361 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3362 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3363 Preserve the packing bit. */
3371 }
3378 /* Is this a sethi instruction? */
3380 {
3386 }
3389 info))
3390 {
3391 /* Replace sethi with a nop. Preserve the packing bit. */
3396 /* Nothing to relocate. */
3398 }
3405 /* Is this a setlo or setlos instruction? */
3407 {
3413 }
3416 info))
3417 /* If the corresponding sethi (if it exists) decayed
3418 to a nop, make sure this becomes (or already is) a
3419 setlos, not setlo. */
3420 {
3423 }
3427 /*
3428 There's nothing to relax in these:
3429 R_FRV_TLSDESC_VALUE
3430 R_FRV_TLSOFF
3431 R_FRV_TLSMOFF12
3432 R_FRV_TLSMOFFHI
3433 R_FRV_TLSMOFFLO
3434 R_FRV_TLSMOFF
3435 */
3439 }
3442 {
3448 {
3453 }
3454 /* We don't want to warn on calls to undefined weak symbols,
3455 as calls to them must be protected by non-NULL tests
3456 anyway, and unprotected calls would invoke undefined
3457 behavior. */
3461 else
3501 {
3507 {
3508 /* If the symbol is dynamic and there may be dynamic
3509 symbol resolution because we are or are linked with a
3510 shared library, emit a FUNCDESC relocation such that
3511 the dynamic linker will allocate the function
3512 descriptor. If the symbol needs a non-local function
3513 descriptor but binds locally (e.g., its visibility is
3514 protected, emit a dynamic relocation decayed to
3515 section+offset. */
3519 {
3524 }
3526 {
3528 {
3534 }
3536 }
3537 else
3538 {
3539 /* Otherwise, we know we have a private function
3540 descriptor, so reference it directly. */
3548 }
3550 /* If there is room for dynamic symbol resolution, emit
3551 the dynamic relocation. However, if we're linking an
3552 executable at a fixed location, we won't have emitted a
3553 dynamic symbol entry for the got section, so idx will
3554 be zero, which means we can and should compute the
3555 address of the private descriptor ourselves. */
3558 {
3563 {
3564 bfd_vma offset;
3567 input_section
3569 {
3575 }
3577 offset = _bfd_elf_section_offset
3583 frvfdpic_gotfixup_section
3585 offset + input_section
3588 picrel);
3589 }
3590 }
3594 {
3595 bfd_vma offset;
3598 input_section
3600 {
3606 }
3608 offset = _bfd_elf_section_offset
3615 offset + input_section
3619 }
3620 else
3622 }
3624 /* We want the addend in-place because dynamic
3625 relocations are REL. Setting relocation to it should
3626 arrange for it to be installed. */
3628 }
3634 {
3637 }
3638 /* Fall through. */
3640 {
3644 /* If the symbol is dynamic but binds locally, use
3645 section+offset. */
3647 {
3649 {
3655 }
3657 }
3658 else
3659 {
3662 else
3670 else
3672 }
3674 /* If we're linking an executable at a fixed address, we
3675 can omit the dynamic relocation as long as the symbol
3676 is defined in the current link unit (which is implied
3677 by its output section not being NULL). */
3680 {
3687 {
3689 input_section
3691 {
3696 }
3698 {
3699 bfd_vma offset = _bfd_elf_section_offset
3704 {
3706 frvfdpic_gotfixup_section
3708 offset + input_section
3711 picrel);
3713 _frvfdpic_add_rofixup
3716 offset
3719 }
3720 }
3721 }
3722 }
3723 else
3724 {
3728 {
3729 bfd_vma offset;
3732 input_section
3734 {
3740 }
3742 offset = _bfd_elf_section_offset
3749 offset + input_section
3753 }
3756 /* We want the addend in-place because dynamic
3757 relocations are REL. Setting relocation to it
3758 should arrange for it to be installed. */
3760 }
3763 {
3764 /* If we've omitted the dynamic relocation, just emit
3765 the fixed addresses of the symbol and of the local
3766 GOT base offset. */
3774 else
3775 /* A function descriptor used for lazy or local
3776 resolving is initialized such that its high word
3777 contains the output section index in which the
3778 PLT entries are located, and the low word
3779 contains the offset of the lazy PLT entry entry
3780 point into that section. */
3785 sec
3788 }
3789 }
3836 {
3839 }
3841 {
3845 }
3846 else
3865 /* These shouldn't be present in input object files. */
3872 /* These are just annotations for relaxation, nothing to do
3873 here. */
3882 }
3885 {
3886 /* If you take this out, remove the #error from fdpic-static-6.d
3887 in the ld testsuite. */
3888 /* This helps catch problems in GCC while we can't do more
3889 than static linking. The idea is to test whether the
3890 input file basename is crt0.o only once. */
3892 silence_segment_error =
3901 /* We don't want duplicate errors for undefined
3902 symbols. */
3905 {
3909 }
3913 }
3916 {
3919 /* We need the addend to be applied before we shift the
3920 value right. */
3922 /* Fall through. */
3929 /* Fall through. */
3943 }
3946 {
3950 /* Fall through. */
3952 /* When referencing a GOT entry, a function descriptor or a
3953 PLT, we don't want the addend to apply to the reference,
3954 but rather to the referenced symbol. The actual entry
3955 will have already been created taking the addend into
3956 account, so cancel it out here. */
3973 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
3974 here, since we do want to apply the addend to the others.
3975 Note that we've applied the addend to GOTOFFHI before we
3976 shifted it right. */
3984 }
4016 else
4021 {
4025 {
4052 }
4055 {
4060 }
4064 }
4065 }
4068 }
4069 \f
4070 /* Return the section that should be marked against GC for a given
4071 relocation. */
4079 {
4082 {
4086 }
4089 }
4090 \f
4091 /* Hook called by the linker routine which adds symbols from an object
4092 file. We use it to put .comm items in .scomm, and not .comm. */
4094 static bfd_boolean
4102 {
4106 {
4107 /* Common symbols less than or equal to -G nn bytes are
4108 automatically put into .sbss. */
4113 {
4115 (SEC_ALLOC
4116 | SEC_IS_COMMON
4120 }
4124 }
4127 }
4129 /* We need dynamic symbols for every section, since segments can
4130 relocate independently. */
4131 static bfd_boolean
4134 ATTRIBUTE_UNUSED,
4136 {
4138 {
4141 /* If sh_type is yet undecided, assume it could be
4142 SHT_PROGBITS/SHT_NOBITS. */
4146 /* There shouldn't be section relative relocations
4147 against any other section. */
4150 }
4151 }
4153 /* Create a .got section, as well as its additional info field. This
4154 is almost entirely copied from
4155 elflink.c:_bfd_elf_create_got_section(). */
4157 static bfd_boolean
4159 {
4168 /* This function may be called more than once. */
4173 /* Machine specific: although pointers are 32-bits wide, we want the
4174 GOT to be aligned to a 64-bit boundary, such that function
4175 descriptors in it can be accessed with 64-bit loads and
4176 stores. */
4189 {
4194 }
4197 {
4198 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4199 (or .got.plt) section. We don't do this in the linker script
4200 because we don't want to define the symbol if we are not creating
4201 a global offset table. */
4207 /* Machine-specific: we want the symbol for executables as
4208 well. */
4211 }
4213 /* The first bit of the global offset table is the header. */
4216 /* This is the machine-specific part. Create and initialize section
4217 data for the got. */
4219 {
4222 frvfdpic_relocs_info_hash,
4223 frvfdpic_relocs_info_eq,
4236 /* Machine-specific. */
4246 }
4247 else
4248 {
4251 }
4253 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4254 turns out that we're linking with a different linker script, the
4255 linker script will override it. */
4266 /* Machine-specific: we want the symbol for executables as well. */
4273 /* FDPIC supports Thread Local Storage, and this may require a
4274 procedure linkage table for TLS PLT entries. */
4276 /* This is mostly copied from
4277 elflink.c:_bfd_elf_create_dynamic_sections(). */
4290 /* FRV-specific: remember it. */
4293 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4294 .plt section. */
4296 {
4302 }
4304 /* FRV-specific: we want rel relocations for the plt. */
4310 /* FRV-specific: remember it. */
4314 }
4316 /* Make sure the got and plt sections exist, and that our pointers in
4317 the link hash table point to them. */
4319 static bfd_boolean
4321 {
4322 /* This is mostly copied from
4323 elflink.c:_bfd_elf_create_dynamic_sections(). */
4324 flagword flags;
4331 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4332 .rel[a].bss sections. */
4334 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4335 way. */
4339 /* FRV-specific: make sure we created everything we wanted. */
4346 {
4347 /* The .dynbss section is a place to put symbols which are defined
4348 by dynamic objects, are referenced by regular objects, and are
4349 not functions. We must allocate space for them in the process
4350 image and use a R_*_COPY reloc to tell the dynamic linker to
4351 initialize them at run time. The linker script puts the .dynbss
4352 section into the .bss section of the final image. */
4358 /* The .rel[a].bss section holds copy relocs. This section is not
4359 normally needed. We need to create it here, though, so that the
4360 linker will map it to an output section. We can't just create it
4361 only if we need it, because we will not know whether we need it
4362 until we have seen all the input files, and the first time the
4363 main linker code calls BFD after examining all the input files
4364 (size_dynamic_sections) the input sections have already been
4365 mapped to the output sections. If the section turns out not to
4366 be needed, we can discard it later. We will never need this
4367 section when generating a shared object, since they do not use
4368 copy relocs. */
4370 {
4378 }
4379 }
4382 }
4384 /* Compute the total GOT and PLT size required by each symbol in each
4385 range. Symbols may require up to 4 words in the GOT: an entry
4386 pointing to the symbol, an entry pointing to its function
4387 descriptor, and a private function descriptors taking two
4388 words. */
4390 static void
4393 {
4394 /* Allocate space for a GOT entry pointing to the symbol. */
4401 else
4405 /* Allocate space for a GOT entry pointing to the function
4406 descriptor. */
4413 else
4417 /* Decide whether we need a PLT entry, a function descriptor in the
4418 GOT, and a lazy PLT entry for this symbol. */
4432 /* Allocate space for a function descriptor. */
4441 else
4447 }
4449 /* Compute the total GOT size required by each TLS symbol in each
4450 range. Symbols may require up to 5 words in the GOT: an entry
4451 holding the TLS offset for the symbol, and an entry with a full TLS
4452 descriptor taking 4 words. */
4454 static void
4457 bfd_boolean subtract)
4458 {
4461 /* Allocate space for a GOT entry with the TLS offset of the
4462 symbol. */
4469 else
4473 /* If there's any TLSOFF relocation, mark the output file as not
4474 suitable for dlopening. This mark will remain even if we relax
4475 all such relocations, but this is not a problem, since we'll only
4476 do so for executables, and we definitely don't want anyone
4477 dlopening executables. */
4481 /* Allocate space for a TLS descriptor. */
4490 else
4493 }
4495 /* Compute the number of dynamic relocations and fixups that a symbol
4496 requires, and add (or subtract) from the grand and per-symbol
4497 totals. */
4499 static void
4502 bfd_boolean subtract)
4503 {
4507 {
4511 /* In the executable, TLS relocations to symbols that bind
4512 locally (including those that resolve to global TLS offsets)
4513 are resolved immediately, without any need for fixups or
4514 dynamic relocations. In shared libraries, however, we must
4515 emit dynamic relocations even for local symbols, because we
4516 don't know the module id the library is going to get at
4517 run-time, nor its TLS base offset. */
4522 }
4523 else
4524 {
4526 {
4532 }
4533 else
4534 {
4537 }
4541 {
4545 }
4546 else
4548 }
4551 {
4555 }
4562 }
4564 /* Look for opportunities to relax TLS relocations. We can assume
4565 we're linking the main executable or a static-tls library, since
4566 otherwise we wouldn't have got here. When relaxing, we have to
4567 first undo any previous accounting of TLS uses of fixups, dynamic
4568 relocations, GOT and PLT entries. */
4570 static void
4573 bfd_boolean relaxing)
4574 {
4581 {
4583 {
4587 }
4589 /* When linking an executable, we can always decay GOTTLSDESC to
4590 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4591 When linking a static-tls shared library, using TLSMOFF is
4592 not an option, but we can still use GOTTLSOFF. When decaying
4593 to GOTTLSOFF, we must keep the GOT entry in range. We know
4594 it has to fit because we'll be trading the 4 words of hte TLS
4595 descriptor for a single word in the same range. */
4599 {
4603 }
4606 }
4608 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4609 main executable. We have to check whether the symbol's TLSOFF is
4610 in range for a setlos. For symbols with a hash entry, we can
4611 determine exactly what to do; for others locals, we don't have
4612 addresses handy, so we use the size of the TLS section as an
4613 approximation. If we get it wrong, we'll retain a GOT entry
4614 holding the TLS offset (without dynamic relocations or fixups),
4615 but we'll still optimize away the loads from it. Since TLS sizes
4616 are generally very small, it's probably not worth attempting to
4617 do better than this. */
4623 /* The above may hold for an undefweak TLS symbol, so make
4624 sure we don't have this case before accessing def.value
4625 and def.section. */
4637 {
4639 {
4643 }
4647 }
4649 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4650 have a #gottlsoff12 relocation for this entry, or if we can fit
4651 one more in the 12-bit (and 16-bit) ranges. */
4654 || (relaxing
4659 {
4661 {
4665 }
4669 }
4672 {
4675 }
4678 }
4680 /* Compute the total GOT and PLT size required by each symbol in each range. *
4681 Symbols may require up to 4 words in the GOT: an entry pointing to
4682 the symbol, an entry pointing to its function descriptor, and a
4683 private function descriptors taking two words. */
4685 static int
4687 {
4695 else
4696 {
4699 }
4702 }
4704 /* Determine the positive and negative ranges to be used by each
4705 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4706 double-word boundary, are the minimum (negative) and maximum
4707 (positive) GOT offsets already used by previous ranges, except for
4708 an ODD entry that may have been left behind. GOT and FD indicate
4709 the size of GOT entries and function descriptors that must be
4710 placed within the range from -WRAP to WRAP. If there's room left,
4711 up to FDPLT bytes should be reserved for additional function
4712 descriptors. */
4716 bfd_signed_vma fdcur,
4717 bfd_signed_vma odd,
4718 bfd_signed_vma cur,
4719 bfd_vma got,
4720 bfd_vma fd,
4721 bfd_vma fdplt,
4722 bfd_vma tlsd,
4723 bfd_vma tlsdplt,
4724 bfd_vma wrap)
4725 {
4729 /* Start at the given initial points. */
4733 /* If we had an incoming odd word and we have any got entries that
4734 are going to use it, consume it, otherwise leave gad->odd at
4735 zero. We might force gad->odd to zero and return the incoming
4736 odd such that it is used by the next range, but then GOT entries
4737 might appear to be out of order and we wouldn't be able to
4738 shorten the GOT by one word if it turns out to end with an
4739 unpaired GOT entry. */
4741 {
4745 }
4746 else
4749 /* If we're left with an unpaired GOT entry, compute its location
4750 such that we can return it. Otherwise, if got doesn't require an
4751 odd number of words here, either odd was already zero in the
4752 block above, or it was set to zero because got was non-zero, or
4753 got was already zero. In the latter case, we want the value of
4754 odd to carry over to the return statement, so we don't want to
4755 reset odd unless the condition below is true. */
4757 {
4760 }
4762 /* Compute the tentative boundaries of this range. */
4767 /* If function descriptors took too much space, wrap some of them
4768 around. */
4770 {
4773 }
4775 /* If GOT entries took too much space, wrap some of them around.
4776 This may well cause gad->min to become lower than wrapmin. This
4777 will cause a relocation overflow later on, so we don't have to
4778 report it here . */
4780 {
4783 }
4785 /* Add TLS descriptors. */
4790 /* If TLS descriptors took too much space, wrap an integral number
4791 of them around. */
4793 {
4801 }
4803 /* If there is space left and we have function descriptors
4804 referenced in PLT entries that could take advantage of shorter
4805 offsets, place them now. */
4807 {
4808 bfd_vma fds;
4812 else
4819 }
4821 /* If there is more space left, try to place some more function
4822 descriptors for PLT entries. */
4824 {
4825 bfd_vma fds;
4829 else
4836 }
4838 /* If there is space left and we have TLS descriptors referenced in
4839 PLT entries that could take advantage of shorter offsets, place
4840 them now. */
4842 {
4843 bfd_vma tlsds;
4847 else
4853 }
4855 /* If there is more space left, try to place some more TLS
4856 descriptors for PLT entries. Although we could try to fit an
4857 additional TLS descriptor with half of it just before before the
4858 wrap point and another right past the wrap point, this might
4859 cause us to run out of space for the next region, so don't do
4860 it. */
4862 {
4863 bfd_vma tlsds;
4867 else
4873 }
4875 /* If odd was initially computed as an offset past the wrap point,
4876 wrap it around. */
4880 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4881 before returning, so do it here too. This guarantees that,
4882 should cur and fdcur meet at the wrap point, they'll both be
4883 equal to min. */
4887 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4893 }
4895 /* Compute the location of the next GOT entry, given the allocation
4896 data for a range. */
4900 {
4901 bfd_signed_vma ret;
4904 {
4905 /* If there was an odd word left behind, use it. */
4908 }
4909 else
4910 {
4911 /* Otherwise, use the word pointed to by cur, reserve the next
4912 as an odd word, and skip to the next pair of words, possibly
4913 wrapping around. */
4919 }
4922 }
4924 /* Compute the location of the next function descriptor entry in the
4925 GOT, given the allocation data for a range. */
4929 {
4930 /* If we're at the bottom, wrap around, and only then allocate the
4931 next pair of words. */
4935 }
4937 /* Compute the location of the next TLS descriptor entry in the GOT,
4938 given the allocation data for a range. */
4941 {
4942 bfd_signed_vma ret;
4948 /* If we're at the top of the region, wrap around to the bottom. */
4953 }
4955 /* Assign GOT offsets for every GOT entry and function descriptor.
4956 Doing everything in a single pass is tricky. */
4958 static int
4960 {
4981 {
4984 }
4988 {
4991 }
4993 {
4996 }
5010 {
5013 }
5017 {
5020 }
5022 {
5025 }
5030 }
5032 /* Assign GOT offsets to private function descriptors used by PLT
5033 entries (or referenced by 32-bit offsets), as well as PLT entries
5034 and lazy PLT entries. */
5036 static int
5038 {
5046 {
5049 /* We use the section's raw size to mark the location of the
5050 next PLT entry. */
5053 /* Figure out the length of this PLT entry based on the
5054 addressing mode we need to reach the function descriptor. */
5062 else
5066 }
5069 {
5072 /* If this entry is the one that gets the resolver stub, account
5073 for the additional instruction. */
5077 }
5080 {
5083 entry->tlsplt_entry
5089 {
5091 /* FIXME: here we use the size of the TLS section
5092 as an upper bound for the value of the TLS
5093 symbol, because we may not know the exact value
5094 yet. If we get it wrong, we'll just waste a
5095 word in the PLT, and we should never get even
5096 close to 32 KiB of TLS anyway. */
5101 else
5103 }
5105 {
5112 else
5114 }
5115 else
5116 {
5125 else
5127 }
5130 }
5133 }
5135 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5136 _frvfdpic_assign_plt_entries. */
5138 static int
5140 {
5153 }
5155 /* Follow indirect and warning hash entries so that each got entry
5156 points to the final symbol definition. P must point to a pointer
5157 to the hash table we're traversing. Since this traversal may
5158 modify the hash table, we set this pointer to NULL to indicate
5159 we've made a potentially-destructive change to the hash table, so
5160 the traversal must be restarted. */
5161 static int
5163 {
5168 {
5180 NO_INSERT);
5183 {
5184 /* Merge the two entries. */
5188 }
5192 /* If we can't find this entry with the new bfd hash, re-insert
5193 it, and get the traversal restarted. */
5195 {
5200 /* Abort the traversal, since the whole table may have
5201 moved, and leave it up to the parent to restart the
5202 process. */
5205 }
5206 }
5209 }
5211 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5212 section and the rofixup section. Assign locations for GOT and PLT
5213 entries. */
5215 static bfd_boolean
5218 {
5219 bfd_signed_vma odd;
5228 /* Compute the total size taken by entries in the 12-bit and 16-bit
5229 ranges, to tell how many PLT function descriptors we can bring
5230 into the 12-bit range without causing the 16-bit range to
5231 overflow. */
5237 else
5240 {
5243 }
5244 else
5249 /* Determine the ranges of GOT offsets that we can use for each
5250 range of addressing modes. */
5253 odd,
5257 limit,
5259 tlslimit,
5263 odd,
5275 odd,
5288 /* Now assign (most) GOT offsets. */
5290 gpinfop);
5294 /* If an odd word is the last word of the GOT, we don't need this
5295 word to be part of the GOT. */
5301 {
5304 }
5305 /* This will be non-NULL during relaxation. The assumption is that
5306 the size of one of these sections will never grow, only shrink,
5307 so we can use the larger buffer we allocated before. */
5309 {
5315 }
5318 /* Subtract the number of lzplt entries, since those will generate
5319 relocations in the pltrel section. */
5323 else
5328 {
5334 }
5340 {
5346 }
5349 {
5356 {
5362 }
5363 }
5365 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5366 such that there's room for the additional instruction needed to
5367 call the resolver. Since _frvfdpic_assign_got_entries didn't
5368 account for them, our block size is 4 bytes smaller than the real
5369 block size. */
5371 {
5375 }
5377 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5378 actually assign lazy PLT entries addresses. */
5381 /* Save information that we're going to need to generate GOT and PLT
5382 entries. */
5393 /* Allocate a ret statement at plt_initial_offset, to be used by
5394 locally-resolved TLS descriptors. */
5399 gpinfop);
5401 /* Allocate the PLT section contents only after
5402 _frvfdpic_assign_plt_entries has a chance to add the size of the
5403 non-lazy PLT entries. */
5405 {
5409 {
5415 }
5416 }
5419 }
5421 /* Set the sizes of the dynamic sections. */
5423 static bfd_boolean
5426 {
5435 {
5436 /* Set the contents of the .interp section to the interpreter. */
5438 {
5443 }
5444 }
5450 {
5457 }
5462 /* Allocate space to save the summary information, we're going to
5463 use it if we're doing relaxations. */
5470 {
5487 }
5490 }
5492 static bfd_boolean
5495 {
5502 }
5504 /* Check whether any of the relocations was optimized away, and
5505 subtract it from the relocation or fixup count. */
5506 static bfd_boolean
5511 {
5525 /* Now examine each relocation. */
5527 {
5545 else
5546 {
5551 }
5557 else
5574 }
5577 }
5579 static bfd_boolean
5583 {
5588 /* Account for relaxation of .eh_frame section. */
5591 {
5595 }
5598 {
5605 /* Clear GOT and PLT assignments. */
5607 _frvfdpic_reset_got_plt_entries,
5608 NULL);
5612 }
5615 }
5617 /* Look for opportunities to relax TLS relocations. We can assume
5618 we're linking the main executable or a static-tls library, since
5619 otherwise we wouldn't have got here. */
5621 static int
5623 {
5630 }
5632 static bfd_boolean
5635 {
5642 /* If we return early, we didn't change anything. */
5645 /* We'll do our thing when requested to relax the GOT section. */
5649 /* We can only relax when linking the main executable or a library
5650 that can't be dlopened. */
5654 /* If there isn't a TLS section for this binary, we can't do
5655 anything about its TLS relocations (it probably doesn't have
5656 any. */
5663 /* Now look for opportunities to relax, adjusting the GOT usage
5664 as needed. */
5666 _frvfdpic_relax_got_plt_entries,
5669 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5672 {
5673 /* Clear GOT and PLT assignments. */
5675 _frvfdpic_reset_got_plt_entries,
5676 NULL);
5678 /* The owner of the TLS section is the output bfd. There should
5679 be a better way to get to it. */
5684 /* Repeat until we don't make any further changes. We could fail to
5685 introduce changes in a round if, for example, the 12-bit range is
5686 full, but we later release some space by getting rid of TLS
5687 descriptors in it. We have to repeat the whole process because
5688 we might have changed the size of a section processed before this
5689 one. */
5691 }
5694 }
5696 /* Fill in code and data in dynamic sections. */
5698 static bfd_boolean
5701 {
5702 /* Nothing to be done for non-FDPIC. */
5704 }
5706 static bfd_boolean
5709 {
5716 {
5718 }
5720 {
5726 {
5738 {
5739 error:
5743 }
5751 {
5752 bfd_vma value =
5761 }
5762 }
5763 }
5765 {
5769 }
5773 {
5785 {
5786 Elf_Internal_Dyn dyn;
5791 {
5813 }
5814 }
5815 }
5818 }
5820 /* Adjust a symbol defined by a dynamic object and referenced by a
5821 regular object. */
5823 static bfd_boolean
5824 elf32_frvfdpic_adjust_dynamic_symbol
5827 {
5832 /* Make sure we know what is going on here. */
5839 /* If this is a weak symbol, and there is a real definition, the
5840 processor independent code will have arranged for us to see the
5841 real definition first, and we can just use the same value. */
5843 {
5848 }
5851 }
5853 /* Perform any actions needed for dynamic symbols. */
5855 static bfd_boolean
5856 elf32_frvfdpic_finish_dynamic_symbol
5861 {
5863 }
5865 /* Decide whether to attempt to turn absptr or lsda encodings in
5866 shared libraries into pcrel within the given input section. */
5868 static bfd_boolean
5869 frvfdpic_elf_use_relative_eh_frame
5873 {
5874 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
5876 }
5878 /* Adjust the contents of an eh_frame_hdr section before they're output. */
5880 static bfd_byte
5886 {
5898 == (_frvfdpic_osec_to_segment
5907 }
5909 /* Look through the relocs for a section during the first phase.
5911 Besides handling virtual table relocs for gc, we have to deal with
5912 all sorts of PIC-related relocations. We describe below the
5913 general plan on how to handle such relocations, even though we only
5914 collect information at this point, storing them in hash tables for
5915 perusal of later passes.
5917 32 relocations are propagated to the linker output when creating
5918 position-independent output. LO16 and HI16 relocations are not
5919 supposed to be encountered in this case.
5921 LABEL16 should always be resolvable by the linker, since it's only
5922 used by branches.
5924 LABEL24, on the other hand, is used by calls. If it turns out that
5925 the target of a call is a dynamic symbol, a PLT entry must be
5926 created for it, which triggers the creation of a private function
5927 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
5929 GPREL relocations require the referenced symbol to be in the same
5930 segment as _gp, but this can only be checked later.
5932 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
5933 exist. LABEL24 might as well, since it may require a PLT entry,
5934 that will require a got.
5936 Non-FUNCDESC GOT relocations require a GOT entry to be created
5937 regardless of whether the symbol is dynamic. However, since a
5938 global symbol that turns out to not be exported may have the same
5939 address of a non-dynamic symbol, we don't assign GOT entries at
5940 this point, such that we can share them in this case. A relocation
5941 for the GOT entry always has to be created, be it to offset a
5942 private symbol by the section load address, be it to get the symbol
5943 resolved dynamically.
5945 FUNCDESC GOT relocations require a GOT entry to be created, and
5946 handled as if a FUNCDESC relocation was applied to the GOT entry in
5947 an object file.
5949 FUNCDESC relocations referencing a symbol that turns out to NOT be
5950 dynamic cause a private function descriptor to be created. The
5951 FUNCDESC relocation then decays to a 32 relocation that points at
5952 the private descriptor. If the symbol is dynamic, the FUNCDESC
5953 relocation is propagated to the linker output, such that the
5954 dynamic linker creates the canonical descriptor, pointing to the
5955 dynamically-resolved definition of the function.
5957 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
5958 symbols that are assigned to the same segment as the GOT, but we
5959 can only check this later, after we know the complete set of
5960 symbols defined and/or exported.
5962 FUNCDESC GOTOFF relocations require a function descriptor to be
5963 created and, unless lazy binding is disabled or the symbol is not
5964 dynamic, a lazy PLT entry. Since we can't tell at this point
5965 whether a symbol is going to be dynamic, we have to decide later
5966 whether to create a lazy PLT entry or bind the descriptor directly
5967 to the private function.
5969 FUNCDESC_VALUE relocations are not supposed to be present in object
5970 files, but they may very well be simply propagated to the linker
5971 output, since they have no side effect.
5974 A function descriptor always requires a FUNCDESC_VALUE relocation.
5975 Whether it's in .plt.rel or not depends on whether lazy binding is
5976 enabled and on whether the referenced symbol is dynamic.
5978 The existence of a lazy PLT requires the resolverStub lazy PLT
5979 entry to be present.
5982 As for assignment of GOT, PLT and lazy PLT entries, and private
5983 descriptors, we might do them all sequentially, but we can do
5984 better than that. For example, we can place GOT entries and
5985 private function descriptors referenced using 12-bit operands
5986 closer to the PIC register value, such that these relocations don't
5987 overflow. Those that are only referenced with LO16 relocations
5988 could come next, but we may as well place PLT-required function
5989 descriptors in the 12-bit range to make them shorter. Symbols
5990 referenced with LO16/HI16 may come next, but we may place
5991 additional function descriptors in the 16-bit range if we can
5992 reliably tell that we've already placed entries that are ever
5993 referenced with only LO16. PLT entries are therefore generated as
5994 small as possible, while not introducing relocation overflows in
5995 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
5996 generated before or after PLT entries, but not intermingled with
5997 them, such that we can have more lazy PLT entries in range for a
5998 branch to the resolverStub. The resolverStub should be emitted at
5999 the most distant location from the first lazy PLT entry such that
6000 it's still in range for a branch, or closer, if there isn't a need
6001 for so many lazy PLT entries. Additional lazy PLT entries may be
6002 emitted after the resolverStub, as long as branches are still in
6003 range. If the branch goes out of range, longer lazy PLT entries
6004 are emitted.
6006 We could further optimize PLT and lazy PLT entries by giving them
6007 priority in assignment to closer-to-gr17 locations depending on the
6008 number of occurrences of references to them (assuming a function
6009 that's called more often is more important for performance, so its
6010 PLT entry should be faster), or taking hints from the compiler.
6011 Given infinite time and money... :-) */
6013 static bfd_boolean
6018 {
6035 {
6042 else
6043 {
6049 /* PR15323, ref flags aren't set for references in the same
6050 object. */
6052 }
6055 {
6085 /* Fall through. */
6093 {
6097 }
6099 {
6102 }
6104 {
6107 {
6114 }
6115 picrel
6119 }
6120 else
6131 }
6134 {
6144 /* Fall through. */
6232 /* This relocation describes the C++ object vtable hierarchy.
6233 Reconstruct it for later use during GC. */
6239 /* This relocation describes which C++ vtable entries are actually
6240 used. Record for later use during GC. */
6262 bad_reloc:
6267 }
6268 }
6271 }
6273 \f
6274 /* Return the machine subcode from the ELF e_flags header. */
6276 static int
6278 {
6280 {
6290 }
6293 }
6295 /* Set the right machine number for a FRV ELF file. */
6297 static bfd_boolean
6299 {
6303 }
6304 \f
6305 /* Function to set the ELF flag bits. */
6307 static bfd_boolean
6309 {
6313 }
6315 /* Return true if the architecture described by elf header flag
6316 EXTENSION is an extension of the architecture described by BASE. */
6318 static bfd_boolean
6320 {
6324 /* CPU_GENERIC code can be merged with code for a specific
6325 architecture, in which case the result is marked as being
6326 for the specific architecture. Everything is therefore
6327 an extension of CPU_GENERIC. */
6340 }
6342 /* Merge backend specific data from an object file to the output
6343 object file when linking. */
6345 static bfd_boolean
6347 {
6361 #ifdef DEBUG
6365 #endif
6368 {
6371 }
6374 ;
6377 {
6378 /* Warn if different # of gprs are used. Note, 0 means nothing is
6379 said about the size of gprs. */
6383 ;
6386 ;
6391 else
6392 {
6394 {
6398 }
6401 {
6405 }
6406 }
6408 /* Warn if different # of fprs are used. Note, 0 means nothing is
6409 said about the size of fprs. */
6413 ;
6416 ;
6421 else
6422 {
6424 {
6429 }
6432 {
6437 }
6438 }
6440 /* Warn if different dword support was used. Note, 0 means nothing is
6441 said about the dword support. */
6445 ;
6448 ;
6453 else
6454 {
6456 {
6460 }
6463 {
6467 }
6468 }
6470 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6471 feature is used. */
6473 | EF_FRV_MEDIA
6474 | EF_FRV_MULADD
6477 /* If any module was compiled without -G0, clear the G0 bit. */
6481 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6485 /* We don't have to do anything if the pic flags are the same, or the new
6486 module(s) were compiled with -mlibrary-pic. */
6490 ;
6492 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6493 flags if any from the new module. */
6497 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6501 /* One module was compiled for pic and the other was not, see if we have
6502 had any relocations that are not pic-safe. */
6503 else
6504 {
6507 else
6508 {
6510 #ifndef FRV_NO_PIC_ERROR
6516 #endif
6517 }
6518 }
6520 /* Warn if different cpu is used (allow a specific cpu to override
6521 the generic cpu). */
6525 ;
6530 else
6531 {
6533 {
6544 }
6547 {
6558 }
6559 }
6561 /* Print out any mismatches from above. */
6563 {
6568 }
6570 /* Warn about any other mismatches */
6574 {
6580 }
6581 }
6583 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6587 /* Update the old flags now with changes made above. */
6595 {
6601 else
6605 }
6611 }
6613 \f
6614 static bfd_boolean
6616 {
6618 flagword flags;
6622 /* Print normal ELF private data. */
6629 {
6639 }
6642 {
6646 }
6649 {
6654 }
6657 {
6661 }
6692 }
6694 \f
6695 /* Support for core dump NOTE sections. */
6697 static bfd_boolean
6699 {
6704 {
6708 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6709 hardcoded offsets and sizes listed below (and contained within
6710 this lexical block) refer to fields in the target's elf_prstatus
6711 struct. */
6713 /* `pr_cursig' is at offset 12. */
6716 /* `pr_pid' is at offset 24. */
6719 /* `pr_reg' is at offset 72. */
6722 /* Most grok_prstatus implementations set `raw_size' to the size
6723 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6724 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6725 and `pr_interp_fdpic_loadmap', both of which (by design)
6726 immediately follow `pr_reg'. This will allow these fields to
6727 be viewed by GDB as registers.
6729 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6730 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6734 }
6736 /* Make a ".reg/999" section. */
6739 }
6741 static bfd_boolean
6743 {
6745 {
6749 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6752 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6756 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6759 }
6761 /* Note that for some reason, a spurious space is tacked
6762 onto the end of the args in some (at least one anyway)
6763 implementations, so strip it off if it exists. */
6765 {
6771 }
6774 }
6775 #define ELF_ARCH bfd_arch_frv
6776 #define ELF_TARGET_ID FRV_ELF_DATA
6777 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6778 #define ELF_MAXPAGESIZE 0x1000
6780 #define TARGET_BIG_SYM frv_elf32_vec
6783 #define elf_info_to_howto frv_info_to_howto_rela
6784 #define elf_backend_relocate_section elf32_frv_relocate_section
6785 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6786 #define elf_backend_check_relocs elf32_frv_check_relocs
6787 #define elf_backend_object_p elf32_frv_object_p
6788 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
6790 #define elf_backend_stack_align 8
6791 #define elf_backend_can_gc_sections 1
6792 #define elf_backend_rela_normal 1
6794 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
6795 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
6796 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
6797 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
6798 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
6800 #define elf_backend_want_got_sym 1
6801 #define elf_backend_got_header_size 0
6802 #define elf_backend_want_got_plt 0
6803 #define elf_backend_plt_readonly 1
6804 #define elf_backend_want_plt_sym 0
6805 #define elf_backend_plt_header_size 0
6807 #define elf_backend_finish_dynamic_sections \
6808 elf32_frv_finish_dynamic_sections
6810 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
6811 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
6815 #undef ELF_MAXPAGESIZE
6816 #define ELF_MAXPAGESIZE 0x4000
6818 #undef TARGET_BIG_SYM
6819 #define TARGET_BIG_SYM frv_elf32_fdpic_vec
6820 #undef TARGET_BIG_NAME
6822 #undef elf32_bed
6823 #define elf32_bed elf32_frvfdpic_bed
6825 #undef elf_info_to_howto_rel
6826 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
6828 #undef bfd_elf32_bfd_link_hash_table_create
6829 #define bfd_elf32_bfd_link_hash_table_create \
6830 frvfdpic_elf_link_hash_table_create
6831 #undef elf_backend_always_size_sections
6832 #define elf_backend_always_size_sections \
6833 elf32_frvfdpic_always_size_sections
6835 #undef elf_backend_create_dynamic_sections
6836 #define elf_backend_create_dynamic_sections \
6837 elf32_frvfdpic_create_dynamic_sections
6838 #undef elf_backend_adjust_dynamic_symbol
6839 #define elf_backend_adjust_dynamic_symbol \
6840 elf32_frvfdpic_adjust_dynamic_symbol
6841 #undef elf_backend_size_dynamic_sections
6842 #define elf_backend_size_dynamic_sections \
6843 elf32_frvfdpic_size_dynamic_sections
6844 #undef bfd_elf32_bfd_relax_section
6845 #define bfd_elf32_bfd_relax_section \
6846 elf32_frvfdpic_relax_section
6847 #undef elf_backend_finish_dynamic_symbol
6848 #define elf_backend_finish_dynamic_symbol \
6849 elf32_frvfdpic_finish_dynamic_symbol
6850 #undef elf_backend_finish_dynamic_sections
6851 #define elf_backend_finish_dynamic_sections \
6852 elf32_frvfdpic_finish_dynamic_sections
6854 #undef elf_backend_discard_info
6855 #define elf_backend_discard_info \
6856 frvfdpic_elf_discard_info
6857 #undef elf_backend_can_make_relative_eh_frame
6858 #define elf_backend_can_make_relative_eh_frame \
6859 frvfdpic_elf_use_relative_eh_frame
6860 #undef elf_backend_can_make_lsda_relative_eh_frame
6861 #define elf_backend_can_make_lsda_relative_eh_frame \
6862 frvfdpic_elf_use_relative_eh_frame
6863 #undef elf_backend_encode_eh_address
6864 #define elf_backend_encode_eh_address \
6865 frvfdpic_elf_encode_eh_address
6867 #undef elf_backend_may_use_rel_p
6868 #define elf_backend_may_use_rel_p 1
6869 #undef elf_backend_may_use_rela_p
6870 #define elf_backend_may_use_rela_p 1
6871 /* We use REL for dynamic relocations only. */
6872 #undef elf_backend_default_use_rela_p
6873 #define elf_backend_default_use_rela_p 1
6875 #undef elf_backend_omit_section_dynsym
6876 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym