| blob | cd37856801d54da9849d67d7aaa3060cba0310dd |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright (C) 2002-2015 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 && sec
1599 {
1604 }
1606 {
1608 {
1615 }
1619 /* A function descriptor used for lazy or local resolving is
1620 initialized such that its high word contains the output
1621 section index in which the PLT entries are located, and
1622 the low word contains the address of the lazy PLT entry
1623 entry point, that must be within the memory region
1624 assigned to that section. */
1628 highword = _frvfdpic_osec_to_segment
1630 }
1631 else
1632 {
1633 /* A function descriptor for a local function gets the index
1634 of the section. For a non-local function, it's
1635 disregarded. */
1641 else
1642 highword = _frvfdpic_osec_to_segment
1644 }
1654 }
1656 /* Generate code for the PLT entry. */
1658 {
1664 /* Figure out what kind of PLT entry we need, depending on the
1665 location of the function descriptor within the GOT. */
1668 {
1669 /* lddi @(gr15, fd_entry), gr14 */
1672 plt_code);
1674 }
1675 else
1676 {
1679 {
1680 /* setlos lo(fd_entry), gr14 */
1682 0x9cfc0000
1684 plt_code);
1686 }
1687 else
1688 {
1689 /* sethi.p hi(fd_entry), gr14
1690 setlo lo(fd_entry), gr14 */
1692 0x1cf80000
1695 plt_code);
1698 0x9cf40000
1700 plt_code);
1702 }
1703 /* ldd @(gr14,gr15),gr14 */
1706 }
1707 /* jmpl @(gr14,gr0) */
1709 }
1711 /* Generate code for the lazy PLT entry. */
1713 {
1716 bfd_vma resolverStub_addr;
1727 {
1728 /* This is a lazy PLT entry that includes a resolver call. */
1729 /* ldd @(gr15,gr0), gr4
1730 jmpl @(gr4,gr0) */
1733 }
1734 else
1735 {
1736 /* bra resolverStub */
1738 0xc01a0000
1741 lzplt_code);
1742 }
1743 }
1745 /* Generate relocation for GOT entry holding the TLS offset. */
1747 {
1753 {
1754 /* If the symbol is dynamic but binds locally, use
1755 section+offset. */
1757 {
1760 else
1766 else
1768 }
1769 }
1771 /* *ABS*+addend is special for TLS relocations, use only the
1772 addend. */
1777 ;
1778 /* If we're linking an executable, we can entirely omit the
1779 dynamic relocation if the symbol is local to this module. */
1783 {
1786 }
1787 else
1788 {
1792 {
1794 {
1799 }
1802 }
1804 _bfd_elf_section_offset
1814 }
1820 }
1823 {
1827 /* If the symbol is dynamic but binds locally, use
1828 section+offset. */
1831 {
1834 else
1839 else
1841 }
1843 /* If we didn't set up a TLS offset entry, but we're linking an
1844 executable and the symbol binds locally, we can use the
1845 module offset in the TLS descriptor in relaxations. */
1855 {
1856 /* *ABS*+addend is special for TLS relocations, use only the
1857 addend for the TLS offset, and take the module id as
1858 0. */
1862 ;
1863 /* For other TLS symbols that bind locally, add the section
1864 TLS offset to the addend. */
1881 ->output_offset
1887 /* We've used one of the reserved fixups, so discount it so
1888 that we can check at the end that we've used them
1889 all. */
1892 /* While at that, make sure the ret instruction makes to the
1893 right location in the PLT. We could do it only when we
1894 got to 0, but since the check at the end will only print
1895 a warning, make sure we have the ret in place in case the
1896 warning is missed. */
1900 }
1901 else
1902 {
1906 {
1908 {
1913 }
1916 }
1919 _bfd_elf_section_offset
1934 }
1940 }
1942 /* Generate code for the get-TLS-offset PLT entry. */
1944 {
1951 {
1955 /* sec may be NULL when referencing an undefweak symbol
1956 while linking a static executable. */
1958 {
1961 }
1962 else
1963 {
1966 else
1972 else
1974 }
1976 /* *ABS*+addend is special for TLS relocations, use only the
1977 addend for the TLS offset, and take the module id as
1978 0. */
1982 ;
1983 /* For other TLS symbols that bind locally, add the section
1984 TLS offset to the addend. */
1990 {
1991 /* setlos lo(ad), gr9 */
1993 0x92fc0000
1994 | (ad
1996 plt_code);
1998 }
1999 else
2000 {
2001 /* sethi.p hi(ad), gr9
2002 setlo lo(ad), gr9 */
2004 0x12f80000
2007 plt_code);
2010 0x92f40000
2011 | (ad
2013 plt_code);
2015 }
2016 /* ret */
2018 }
2020 {
2021 /* Figure out what kind of PLT entry we need, depending on the
2022 location of the TLS descriptor within the GOT. */
2025 {
2026 /* ldi @(gr15, tlsoff_entry), gr9 */
2030 plt_code);
2032 }
2033 else
2034 {
2037 {
2038 /* setlos lo(tlsoff_entry), gr8 */
2040 0x90fc0000
2043 plt_code);
2045 }
2046 else
2047 {
2048 /* sethi.p hi(tlsoff_entry), gr8
2049 setlo lo(tlsoff_entry), gr8 */
2051 0x10f80000
2054 plt_code);
2057 0x90f40000
2060 plt_code);
2062 }
2063 /* ld @(gr15,gr8),gr9 */
2066 }
2067 /* ret */
2069 }
2070 else
2071 {
2074 /* Figure out what kind of PLT entry we need, depending on the
2075 location of the TLS descriptor within the GOT. */
2078 {
2079 /* lddi @(gr15, tlsdesc_entry), gr8 */
2083 plt_code);
2085 }
2086 else
2087 {
2090 {
2091 /* setlos lo(tlsdesc_entry), gr8 */
2093 0x90fc0000
2096 plt_code);
2098 }
2099 else
2100 {
2101 /* sethi.p hi(tlsdesc_entry), gr8
2102 setlo lo(tlsdesc_entry), gr8 */
2104 0x10f80000
2107 plt_code);
2110 0x90f40000
2113 plt_code);
2115 }
2116 /* ldd @(gr15,gr8),gr8 */
2119 }
2120 /* jmpl @(gr8,gr0) */
2122 }
2123 }
2126 }
2128 /* Handle an FRV small data reloc. */
2130 static bfd_reloc_status_type
2136 bfd_vma value)
2137 {
2138 bfd_vma insn;
2139 bfd_vma gp;
2163 }
2165 /* Handle an FRV small data reloc. for the u12 field. */
2167 static bfd_reloc_status_type
2173 bfd_vma value)
2174 {
2175 bfd_vma insn;
2176 bfd_vma gp;
2178 bfd_vma mask;
2196 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2203 }
2205 /* Handle an FRV ELF HI16 reloc. */
2207 static bfd_reloc_status_type
2211 bfd_vma value)
2212 {
2213 bfd_vma insn;
2228 }
2229 static bfd_reloc_status_type
2233 bfd_vma value)
2234 {
2235 bfd_vma insn;
2249 }
2251 /* Perform the relocation for the CALL label24 instruction. */
2253 static bfd_reloc_status_type
2258 bfd_vma value)
2259 {
2260 bfd_vma insn;
2261 bfd_vma label6;
2262 bfd_vma label18;
2264 /* The format for the call instruction is:
2266 0 000000 0001111 000000000000000000
2267 label6 opcode label18
2269 The branch calculation is: pc + (4*label24)
2270 where label24 is the concatenation of label6 and label18. */
2272 /* Grab the instruction. */
2293 }
2295 static bfd_reloc_status_type
2301 bfd_vma value)
2302 {
2303 bfd_vma insn;
2304 bfd_vma gp;
2326 }
2328 static bfd_reloc_status_type
2334 bfd_vma value)
2335 {
2336 bfd_vma insn;
2337 bfd_vma gp;
2360 }
2364 bfd_reloc_code_real_type code)
2365 {
2367 {
2378 /* Fall through. */
2516 }
2519 }
2523 {
2528 i++)
2539 }
2541 /* Set the howto pointer for an FRV ELF reloc. */
2543 static void
2547 {
2552 {
2563 {
2566 }
2569 }
2570 }
2572 /* Set the howto pointer for an FRV ELF REL reloc. */
2573 static void
2576 {
2581 {
2605 }
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 {
2813 else
2814 /* In order to find the entry we created before, we must
2815 use the original addend, not the one that may have been
2816 modified by _bfd_elf_rela_local_sym(). */
2826 {
2832 }
2837 non_fdpic:
2843 {
2849 }
2851 }
2854 {
2877 }
2879 /* Try to apply TLS relaxations. */
2882 {
2884 #define LOCAL_EXEC_P(info, picrel) \
2885 (bfd_link_executable (info) \
2886 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2887 #define INITIAL_EXEC_P(info, picrel) \
2888 ((bfd_link_executable (info)|| (info)->flags & DF_STATIC_TLS) \
2889 && (picrel)->tlsoff_entry)
2891 #define IN_RANGE_FOR_OFST12_P(value) \
2892 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2893 #define IN_RANGE_FOR_SETLOS_P(value) \
2894 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2895 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2896 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2898 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2899 (LOCAL_EXEC_P ((info), (picrel)) \
2900 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2901 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2902 (INITIAL_EXEC_P ((info), (picrel)) \
2903 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2905 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2906 (LOCAL_EXEC_P ((info), (picrel)))
2907 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2908 (INITIAL_EXEC_P ((info), (picrel)))
2910 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2911 (LOCAL_EXEC_P ((info), (picrel)) \
2912 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2917 /* Is this a call instruction? */
2919 {
2924 }
2928 {
2929 /* Replace the call instruction (except the packing bit)
2930 with setlos #tlsmofflo(symbol+offset), gr9. */
2938 }
2941 {
2942 /* Replace the call instruction (except the packing bit)
2943 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
2951 }
2958 /* Is this an lddi instruction? */
2960 {
2966 }
2971 info))
2972 {
2973 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
2974 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
2975 Preserve the packing bit. */
2985 }
2989 {
2990 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
2991 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
2992 Preserve the packing bit. */
3002 }
3005 {
3006 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3007 with ldi @(grB, #gottlsoff12(symbol+offset),
3008 gr<C+1>. Preserve the packing bit. If gottlsoff12
3009 overflows, we'll error out, but that's sort-of ok,
3010 since we'd started with gottlsdesc12, that's actually
3011 more demanding. Compiling with -fPIE instead of
3012 -fpie would fix it; linking with --relax should fix
3013 it as well. */
3022 }
3029 /* Is this a sethi instruction? */
3031 {
3037 }
3043 {
3044 /* Replace sethi with a nop. Preserve the packing bit. */
3049 /* Nothing to relocate. */
3051 }
3054 {
3055 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3059 }
3066 /* Is this a setlo or setlos instruction? */
3068 {
3074 }
3080 {
3081 /* Replace setlo/setlos with a nop. Preserve the
3082 packing bit. */
3087 /* Nothing to relocate. */
3089 }
3092 {
3093 /* If the corresponding sethi (if it exists) decayed
3094 to a nop, make sure this becomes (or already is) a
3095 setlos, not setlo. */
3097 {
3100 }
3102 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3106 }
3113 /* Is this an ldd instruction? */
3115 {
3121 }
3126 info))
3127 {
3128 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3129 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3130 Preserve the packing bit. */
3140 }
3144 {
3145 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3146 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3147 Preserve the packing bit. */
3157 }
3161 {
3162 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3163 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3164 Preserve the packing bit. */
3174 }
3177 {
3178 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3179 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3180 Preserve the packing bit. */
3186 /* #tlsoff(symbol+offset) is just a relaxation
3187 annotation, so there's nothing left to
3188 relocate. */
3190 }
3197 /* Is this a calll or callil instruction? */
3199 {
3205 }
3210 info))
3211 {
3212 /* Replace calll with a nop. Preserve the packing bit. */
3217 /* Nothing to relocate. */
3219 }
3223 {
3224 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3225 Preserve the packing bit. */
3233 }
3236 {
3237 /* Replace calll with a nop. Preserve the packing bit. */
3242 /* Nothing to relocate. */
3244 }
3251 /* Is this an ldi instruction? */
3253 {
3259 }
3263 {
3264 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3265 with setlos #tlsmofflo(symbol+offset), grC.
3266 Preserve the packing bit. */
3274 }
3281 /* Is this a sethi instruction? */
3283 {
3289 }
3295 {
3296 /* Replace sethi with a nop. Preserve the packing bit. */
3301 /* Nothing to relocate. */
3303 }
3310 /* Is this a setlo or setlos instruction? */
3312 {
3318 }
3324 {
3325 /* Replace setlo/setlos with a nop. Preserve the
3326 packing bit. */
3331 /* Nothing to relocate. */
3333 }
3340 /* Is this an ld instruction? */
3342 {
3348 }
3352 {
3353 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3354 with setlos #tlsmofflo(symbol+offset), grC.
3355 Preserve the packing bit. */
3363 }
3367 {
3368 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3369 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3370 Preserve the packing bit. */
3378 }
3385 /* Is this a sethi instruction? */
3387 {
3393 }
3396 info))
3397 {
3398 /* Replace sethi with a nop. Preserve the packing bit. */
3403 /* Nothing to relocate. */
3405 }
3412 /* Is this a setlo or setlos instruction? */
3414 {
3420 }
3423 info))
3424 /* If the corresponding sethi (if it exists) decayed
3425 to a nop, make sure this becomes (or already is) a
3426 setlos, not setlo. */
3427 {
3430 }
3434 /*
3435 There's nothing to relax in these:
3436 R_FRV_TLSDESC_VALUE
3437 R_FRV_TLSOFF
3438 R_FRV_TLSMOFF12
3439 R_FRV_TLSMOFFHI
3440 R_FRV_TLSMOFFLO
3441 R_FRV_TLSMOFF
3442 */
3446 }
3449 {
3455 {
3460 }
3461 /* We don't want to warn on calls to undefined weak symbols,
3462 as calls to them must be protected by non-NULL tests
3463 anyway, and unprotected calls would invoke undefined
3464 behavior. */
3468 else
3508 {
3514 {
3515 /* If the symbol is dynamic and there may be dynamic
3516 symbol resolution because we are or are linked with a
3517 shared library, emit a FUNCDESC relocation such that
3518 the dynamic linker will allocate the function
3519 descriptor. If the symbol needs a non-local function
3520 descriptor but binds locally (e.g., its visibility is
3521 protected, emit a dynamic relocation decayed to
3522 section+offset. */
3526 {
3531 }
3533 {
3535 {
3541 }
3543 }
3544 else
3545 {
3546 /* Otherwise, we know we have a private function
3547 descriptor, so reference it directly. */
3555 }
3557 /* If there is room for dynamic symbol resolution, emit
3558 the dynamic relocation. However, if we're linking an
3559 executable at a fixed location, we won't have emitted a
3560 dynamic symbol entry for the got section, so idx will
3561 be zero, which means we can and should compute the
3562 address of the private descriptor ourselves. */
3565 {
3570 {
3571 bfd_vma offset;
3574 input_section
3576 {
3582 }
3584 offset = _bfd_elf_section_offset
3590 frvfdpic_gotfixup_section
3592 offset + input_section
3595 picrel);
3596 }
3597 }
3601 {
3602 bfd_vma offset;
3605 input_section
3607 {
3613 }
3615 offset = _bfd_elf_section_offset
3622 offset + input_section
3626 }
3627 else
3629 }
3631 /* We want the addend in-place because dynamic
3632 relocations are REL. Setting relocation to it should
3633 arrange for it to be installed. */
3635 }
3641 {
3644 }
3645 /* Fall through. */
3647 {
3651 /* If the symbol is dynamic but binds locally, use
3652 section+offset. */
3654 {
3656 {
3662 }
3664 }
3665 else
3666 {
3669 else
3677 else
3679 }
3681 /* If we're linking an executable at a fixed address, we
3682 can omit the dynamic relocation as long as the symbol
3683 is defined in the current link unit (which is implied
3684 by its output section not being NULL). */
3687 {
3694 {
3696 input_section
3698 {
3703 }
3705 {
3706 bfd_vma offset = _bfd_elf_section_offset
3711 {
3713 frvfdpic_gotfixup_section
3715 offset + input_section
3718 picrel);
3720 _frvfdpic_add_rofixup
3723 offset
3726 }
3727 }
3728 }
3729 }
3730 else
3731 {
3735 {
3736 bfd_vma offset;
3739 input_section
3741 {
3747 }
3749 offset = _bfd_elf_section_offset
3756 offset + input_section
3760 }
3763 /* We want the addend in-place because dynamic
3764 relocations are REL. Setting relocation to it
3765 should arrange for it to be installed. */
3767 }
3770 {
3771 /* If we've omitted the dynamic relocation, just emit
3772 the fixed addresses of the symbol and of the local
3773 GOT base offset. */
3781 else
3782 /* A function descriptor used for lazy or local
3783 resolving is initialized such that its high word
3784 contains the output section index in which the
3785 PLT entries are located, and the low word
3786 contains the offset of the lazy PLT entry entry
3787 point into that section. */
3792 sec
3795 }
3796 }
3843 {
3846 }
3848 {
3852 }
3853 else
3872 /* These shouldn't be present in input object files. */
3879 /* These are just annotations for relaxation, nothing to do
3880 here. */
3889 }
3892 {
3893 /* If you take this out, remove the #error from fdpic-static-6.d
3894 in the ld testsuite. */
3895 /* This helps catch problems in GCC while we can't do more
3896 than static linking. The idea is to test whether the
3897 input file basename is crt0.o only once. */
3899 silence_segment_error =
3908 /* We don't want duplicate errors for undefined
3909 symbols. */
3912 {
3916 }
3920 }
3923 {
3926 /* We need the addend to be applied before we shift the
3927 value right. */
3929 /* Fall through. */
3936 /* Fall through. */
3950 }
3953 {
3957 /* Fall through. */
3959 /* When referencing a GOT entry, a function descriptor or a
3960 PLT, we don't want the addend to apply to the reference,
3961 but rather to the referenced symbol. The actual entry
3962 will have already been created taking the addend into
3963 account, so cancel it out here. */
3980 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
3981 here, since we do want to apply the addend to the others.
3982 Note that we've applied the addend to GOTOFFHI before we
3983 shifted it right. */
3991 }
4023 else
4028 {
4032 {
4059 }
4062 {
4067 }
4071 }
4072 }
4075 }
4076 \f
4077 /* Return the section that should be marked against GC for a given
4078 relocation. */
4086 {
4089 {
4093 }
4096 }
4097 \f
4098 /* Hook called by the linker routine which adds symbols from an object
4099 file. We use it to put .comm items in .scomm, and not .comm. */
4101 static bfd_boolean
4109 {
4113 {
4114 /* Common symbols less than or equal to -G nn bytes are
4115 automatically put into .sbss. */
4120 {
4122 (SEC_ALLOC
4123 | SEC_IS_COMMON
4127 }
4131 }
4134 }
4136 /* We need dynamic symbols for every section, since segments can
4137 relocate independently. */
4138 static bfd_boolean
4141 ATTRIBUTE_UNUSED,
4143 {
4145 {
4148 /* If sh_type is yet undecided, assume it could be
4149 SHT_PROGBITS/SHT_NOBITS. */
4153 /* There shouldn't be section relative relocations
4154 against any other section. */
4157 }
4158 }
4160 /* Create a .got section, as well as its additional info field. This
4161 is almost entirely copied from
4162 elflink.c:_bfd_elf_create_got_section(). */
4164 static bfd_boolean
4166 {
4175 /* This function may be called more than once. */
4180 /* Machine specific: although pointers are 32-bits wide, we want the
4181 GOT to be aligned to a 64-bit boundary, such that function
4182 descriptors in it can be accessed with 64-bit loads and
4183 stores. */
4196 {
4201 }
4204 {
4205 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4206 (or .got.plt) section. We don't do this in the linker script
4207 because we don't want to define the symbol if we are not creating
4208 a global offset table. */
4214 /* Machine-specific: we want the symbol for executables as
4215 well. */
4218 }
4220 /* The first bit of the global offset table is the header. */
4223 /* This is the machine-specific part. Create and initialize section
4224 data for the got. */
4226 {
4229 frvfdpic_relocs_info_hash,
4230 frvfdpic_relocs_info_eq,
4243 /* Machine-specific. */
4253 }
4254 else
4255 {
4258 }
4260 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4261 turns out that we're linking with a different linker script, the
4262 linker script will override it. */
4273 /* Machine-specific: we want the symbol for executables as well. */
4280 /* FDPIC supports Thread Local Storage, and this may require a
4281 procedure linkage table for TLS PLT entries. */
4283 /* This is mostly copied from
4284 elflink.c:_bfd_elf_create_dynamic_sections(). */
4297 /* FRV-specific: remember it. */
4300 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4301 .plt section. */
4303 {
4309 }
4311 /* FRV-specific: we want rel relocations for the plt. */
4317 /* FRV-specific: remember it. */
4321 }
4323 /* Make sure the got and plt sections exist, and that our pointers in
4324 the link hash table point to them. */
4326 static bfd_boolean
4328 {
4329 /* This is mostly copied from
4330 elflink.c:_bfd_elf_create_dynamic_sections(). */
4331 flagword flags;
4338 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4339 .rel[a].bss sections. */
4341 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4342 way. */
4346 /* FRV-specific: make sure we created everything we wanted. */
4353 {
4354 /* The .dynbss section is a place to put symbols which are defined
4355 by dynamic objects, are referenced by regular objects, and are
4356 not functions. We must allocate space for them in the process
4357 image and use a R_*_COPY reloc to tell the dynamic linker to
4358 initialize them at run time. The linker script puts the .dynbss
4359 section into the .bss section of the final image. */
4365 /* The .rel[a].bss section holds copy relocs. This section is not
4366 normally needed. We need to create it here, though, so that the
4367 linker will map it to an output section. We can't just create it
4368 only if we need it, because we will not know whether we need it
4369 until we have seen all the input files, and the first time the
4370 main linker code calls BFD after examining all the input files
4371 (size_dynamic_sections) the input sections have already been
4372 mapped to the output sections. If the section turns out not to
4373 be needed, we can discard it later. We will never need this
4374 section when generating a shared object, since they do not use
4375 copy relocs. */
4377 {
4385 }
4386 }
4389 }
4391 /* Compute the total GOT and PLT size required by each symbol in each
4392 range. Symbols may require up to 4 words in the GOT: an entry
4393 pointing to the symbol, an entry pointing to its function
4394 descriptor, and a private function descriptors taking two
4395 words. */
4397 static void
4400 {
4401 /* Allocate space for a GOT entry pointing to the symbol. */
4408 else
4412 /* Allocate space for a GOT entry pointing to the function
4413 descriptor. */
4420 else
4424 /* Decide whether we need a PLT entry, a function descriptor in the
4425 GOT, and a lazy PLT entry for this symbol. */
4439 /* Allocate space for a function descriptor. */
4448 else
4454 }
4456 /* Compute the total GOT size required by each TLS symbol in each
4457 range. Symbols may require up to 5 words in the GOT: an entry
4458 holding the TLS offset for the symbol, and an entry with a full TLS
4459 descriptor taking 4 words. */
4461 static void
4464 bfd_boolean subtract)
4465 {
4468 /* Allocate space for a GOT entry with the TLS offset of the
4469 symbol. */
4476 else
4480 /* If there's any TLSOFF relocation, mark the output file as not
4481 suitable for dlopening. This mark will remain even if we relax
4482 all such relocations, but this is not a problem, since we'll only
4483 do so for executables, and we definitely don't want anyone
4484 dlopening executables. */
4488 /* Allocate space for a TLS descriptor. */
4497 else
4500 }
4502 /* Compute the number of dynamic relocations and fixups that a symbol
4503 requires, and add (or subtract) from the grand and per-symbol
4504 totals. */
4506 static void
4509 bfd_boolean subtract)
4510 {
4514 {
4518 /* In the executable, TLS relocations to symbols that bind
4519 locally (including those that resolve to global TLS offsets)
4520 are resolved immediately, without any need for fixups or
4521 dynamic relocations. In shared libraries, however, we must
4522 emit dynamic relocations even for local symbols, because we
4523 don't know the module id the library is going to get at
4524 run-time, nor its TLS base offset. */
4529 }
4530 else
4531 {
4533 {
4539 }
4540 else
4541 {
4544 }
4548 {
4552 }
4553 else
4555 }
4558 {
4562 }
4569 }
4571 /* Look for opportunities to relax TLS relocations. We can assume
4572 we're linking the main executable or a static-tls library, since
4573 otherwise we wouldn't have got here. When relaxing, we have to
4574 first undo any previous accounting of TLS uses of fixups, dynamic
4575 relocations, GOT and PLT entries. */
4577 static void
4580 bfd_boolean relaxing)
4581 {
4588 {
4590 {
4594 }
4596 /* When linking an executable, we can always decay GOTTLSDESC to
4597 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4598 When linking a static-tls shared library, using TLSMOFF is
4599 not an option, but we can still use GOTTLSOFF. When decaying
4600 to GOTTLSOFF, we must keep the GOT entry in range. We know
4601 it has to fit because we'll be trading the 4 words of hte TLS
4602 descriptor for a single word in the same range. */
4606 {
4610 }
4613 }
4615 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4616 main executable. We have to check whether the symbol's TLSOFF is
4617 in range for a setlos. For symbols with a hash entry, we can
4618 determine exactly what to do; for others locals, we don't have
4619 addresses handy, so we use the size of the TLS section as an
4620 approximation. If we get it wrong, we'll retain a GOT entry
4621 holding the TLS offset (without dynamic relocations or fixups),
4622 but we'll still optimize away the loads from it. Since TLS sizes
4623 are generally very small, it's probably not worth attempting to
4624 do better than this. */
4630 /* The above may hold for an undefweak TLS symbol, so make
4631 sure we don't have this case before accessing def.value
4632 and def.section. */
4644 {
4646 {
4650 }
4654 }
4656 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4657 have a #gottlsoff12 relocation for this entry, or if we can fit
4658 one more in the 12-bit (and 16-bit) ranges. */
4661 || (relaxing
4666 {
4668 {
4672 }
4676 }
4679 {
4682 }
4685 }
4687 /* Compute the total GOT and PLT size required by each symbol in each range. *
4688 Symbols may require up to 4 words in the GOT: an entry pointing to
4689 the symbol, an entry pointing to its function descriptor, and a
4690 private function descriptors taking two words. */
4692 static int
4694 {
4703 else
4704 {
4707 }
4710 }
4712 /* Determine the positive and negative ranges to be used by each
4713 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4714 double-word boundary, are the minimum (negative) and maximum
4715 (positive) GOT offsets already used by previous ranges, except for
4716 an ODD entry that may have been left behind. GOT and FD indicate
4717 the size of GOT entries and function descriptors that must be
4718 placed within the range from -WRAP to WRAP. If there's room left,
4719 up to FDPLT bytes should be reserved for additional function
4720 descriptors. */
4724 bfd_signed_vma fdcur,
4725 bfd_signed_vma odd,
4726 bfd_signed_vma cur,
4727 bfd_vma got,
4728 bfd_vma fd,
4729 bfd_vma fdplt,
4730 bfd_vma tlsd,
4731 bfd_vma tlsdplt,
4732 bfd_vma wrap)
4733 {
4737 /* Start at the given initial points. */
4741 /* If we had an incoming odd word and we have any got entries that
4742 are going to use it, consume it, otherwise leave gad->odd at
4743 zero. We might force gad->odd to zero and return the incoming
4744 odd such that it is used by the next range, but then GOT entries
4745 might appear to be out of order and we wouldn't be able to
4746 shorten the GOT by one word if it turns out to end with an
4747 unpaired GOT entry. */
4749 {
4753 }
4754 else
4757 /* If we're left with an unpaired GOT entry, compute its location
4758 such that we can return it. Otherwise, if got doesn't require an
4759 odd number of words here, either odd was already zero in the
4760 block above, or it was set to zero because got was non-zero, or
4761 got was already zero. In the latter case, we want the value of
4762 odd to carry over to the return statement, so we don't want to
4763 reset odd unless the condition below is true. */
4765 {
4768 }
4770 /* Compute the tentative boundaries of this range. */
4775 /* If function descriptors took too much space, wrap some of them
4776 around. */
4778 {
4781 }
4783 /* If GOT entries took too much space, wrap some of them around.
4784 This may well cause gad->min to become lower than wrapmin. This
4785 will cause a relocation overflow later on, so we don't have to
4786 report it here . */
4788 {
4791 }
4793 /* Add TLS descriptors. */
4798 /* If TLS descriptors took too much space, wrap an integral number
4799 of them around. */
4801 {
4809 }
4811 /* If there is space left and we have function descriptors
4812 referenced in PLT entries that could take advantage of shorter
4813 offsets, place them now. */
4815 {
4816 bfd_vma fds;
4820 else
4827 }
4829 /* If there is more space left, try to place some more function
4830 descriptors for PLT entries. */
4832 {
4833 bfd_vma fds;
4837 else
4844 }
4846 /* If there is space left and we have TLS descriptors referenced in
4847 PLT entries that could take advantage of shorter offsets, place
4848 them now. */
4850 {
4851 bfd_vma tlsds;
4855 else
4861 }
4863 /* If there is more space left, try to place some more TLS
4864 descriptors for PLT entries. Although we could try to fit an
4865 additional TLS descriptor with half of it just before before the
4866 wrap point and another right past the wrap point, this might
4867 cause us to run out of space for the next region, so don't do
4868 it. */
4870 {
4871 bfd_vma tlsds;
4875 else
4881 }
4883 /* If odd was initially computed as an offset past the wrap point,
4884 wrap it around. */
4888 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4889 before returning, so do it here too. This guarantees that,
4890 should cur and fdcur meet at the wrap point, they'll both be
4891 equal to min. */
4895 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4901 }
4903 /* Compute the location of the next GOT entry, given the allocation
4904 data for a range. */
4908 {
4909 bfd_signed_vma ret;
4912 {
4913 /* If there was an odd word left behind, use it. */
4916 }
4917 else
4918 {
4919 /* Otherwise, use the word pointed to by cur, reserve the next
4920 as an odd word, and skip to the next pair of words, possibly
4921 wrapping around. */
4927 }
4930 }
4932 /* Compute the location of the next function descriptor entry in the
4933 GOT, given the allocation data for a range. */
4937 {
4938 /* If we're at the bottom, wrap around, and only then allocate the
4939 next pair of words. */
4943 }
4945 /* Compute the location of the next TLS descriptor entry in the GOT,
4946 given the allocation data for a range. */
4949 {
4950 bfd_signed_vma ret;
4956 /* If we're at the top of the region, wrap around to the bottom. */
4961 }
4963 /* Assign GOT offsets for every GOT entry and function descriptor.
4964 Doing everything in a single pass is tricky. */
4966 static int
4968 {
4989 {
4992 }
4996 {
4999 }
5001 {
5004 }
5018 {
5021 }
5025 {
5028 }
5030 {
5033 }
5038 }
5040 /* Assign GOT offsets to private function descriptors used by PLT
5041 entries (or referenced by 32-bit offsets), as well as PLT entries
5042 and lazy PLT entries. */
5044 static int
5046 {
5054 {
5057 /* We use the section's raw size to mark the location of the
5058 next PLT entry. */
5061 /* Figure out the length of this PLT entry based on the
5062 addressing mode we need to reach the function descriptor. */
5070 else
5074 }
5077 {
5080 /* If this entry is the one that gets the resolver stub, account
5081 for the additional instruction. */
5085 }
5088 {
5091 entry->tlsplt_entry
5097 {
5099 /* FIXME: here we use the size of the TLS section
5100 as an upper bound for the value of the TLS
5101 symbol, because we may not know the exact value
5102 yet. If we get it wrong, we'll just waste a
5103 word in the PLT, and we should never get even
5104 close to 32 KiB of TLS anyway. */
5109 else
5111 }
5113 {
5120 else
5122 }
5123 else
5124 {
5133 else
5135 }
5138 }
5141 }
5143 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5144 _frvfdpic_assign_plt_entries. */
5146 static int
5148 {
5161 }
5163 /* Follow indirect and warning hash entries so that each got entry
5164 points to the final symbol definition. P must point to a pointer
5165 to the hash table we're traversing. Since this traversal may
5166 modify the hash table, we set this pointer to NULL to indicate
5167 we've made a potentially-destructive change to the hash table, so
5168 the traversal must be restarted. */
5169 static int
5171 {
5176 {
5188 NO_INSERT);
5191 {
5192 /* Merge the two entries. */
5196 }
5200 /* If we can't find this entry with the new bfd hash, re-insert
5201 it, and get the traversal restarted. */
5203 {
5208 /* Abort the traversal, since the whole table may have
5209 moved, and leave it up to the parent to restart the
5210 process. */
5213 }
5214 }
5217 }
5219 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5220 section and the rofixup section. Assign locations for GOT and PLT
5221 entries. */
5223 static bfd_boolean
5226 {
5227 bfd_signed_vma odd;
5236 /* Compute the total size taken by entries in the 12-bit and 16-bit
5237 ranges, to tell how many PLT function descriptors we can bring
5238 into the 12-bit range without causing the 16-bit range to
5239 overflow. */
5245 else
5248 {
5251 }
5252 else
5257 /* Determine the ranges of GOT offsets that we can use for each
5258 range of addressing modes. */
5261 odd,
5265 limit,
5267 tlslimit,
5271 odd,
5283 odd,
5296 /* Now assign (most) GOT offsets. */
5298 gpinfop);
5302 /* If an odd word is the last word of the GOT, we don't need this
5303 word to be part of the GOT. */
5309 {
5312 }
5313 /* This will be non-NULL during relaxation. The assumption is that
5314 the size of one of these sections will never grow, only shrink,
5315 so we can use the larger buffer we allocated before. */
5317 {
5323 }
5326 /* Subtract the number of lzplt entries, since those will generate
5327 relocations in the pltrel section. */
5331 else
5336 {
5342 }
5348 {
5354 }
5357 {
5364 {
5370 }
5371 }
5373 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5374 such that there's room for the additional instruction needed to
5375 call the resolver. Since _frvfdpic_assign_got_entries didn't
5376 account for them, our block size is 4 bytes smaller than the real
5377 block size. */
5379 {
5383 }
5385 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5386 actually assign lazy PLT entries addresses. */
5389 /* Save information that we're going to need to generate GOT and PLT
5390 entries. */
5401 /* Allocate a ret statement at plt_initial_offset, to be used by
5402 locally-resolved TLS descriptors. */
5407 gpinfop);
5409 /* Allocate the PLT section contents only after
5410 _frvfdpic_assign_plt_entries has a chance to add the size of the
5411 non-lazy PLT entries. */
5413 {
5417 {
5423 }
5424 }
5427 }
5429 /* Set the sizes of the dynamic sections. */
5431 static bfd_boolean
5434 {
5443 {
5444 /* Set the contents of the .interp section to the interpreter. */
5446 {
5451 }
5452 }
5458 {
5465 }
5470 /* Allocate space to save the summary information, we're going to
5471 use it if we're doing relaxations. */
5478 {
5495 }
5498 }
5500 static bfd_boolean
5503 {
5510 }
5512 /* Check whether any of the relocations was optimized away, and
5513 subtract it from the relocation or fixup count. */
5514 static bfd_boolean
5519 {
5533 /* Now examine each relocation. */
5535 {
5553 else
5554 {
5559 }
5565 else
5582 }
5585 }
5587 static bfd_boolean
5591 {
5596 /* Account for relaxation of .eh_frame section. */
5599 {
5603 }
5606 {
5613 /* Clear GOT and PLT assignments. */
5615 _frvfdpic_reset_got_plt_entries,
5616 NULL);
5620 }
5623 }
5625 /* Look for opportunities to relax TLS relocations. We can assume
5626 we're linking the main executable or a static-tls library, since
5627 otherwise we wouldn't have got here. */
5629 static int
5631 {
5638 }
5640 static bfd_boolean
5643 {
5650 /* If we return early, we didn't change anything. */
5653 /* We'll do our thing when requested to relax the GOT section. */
5657 /* We can only relax when linking the main executable or a library
5658 that can't be dlopened. */
5662 /* If there isn't a TLS section for this binary, we can't do
5663 anything about its TLS relocations (it probably doesn't have
5664 any. */
5671 /* Now look for opportunities to relax, adjusting the GOT usage
5672 as needed. */
5674 _frvfdpic_relax_got_plt_entries,
5677 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5680 {
5681 /* Clear GOT and PLT assignments. */
5683 _frvfdpic_reset_got_plt_entries,
5684 NULL);
5686 /* The owner of the TLS section is the output bfd. There should
5687 be a better way to get to it. */
5692 /* Repeat until we don't make any further changes. We could fail to
5693 introduce changes in a round if, for example, the 12-bit range is
5694 full, but we later release some space by getting rid of TLS
5695 descriptors in it. We have to repeat the whole process because
5696 we might have changed the size of a section processed before this
5697 one. */
5699 }
5702 }
5704 /* Fill in code and data in dynamic sections. */
5706 static bfd_boolean
5709 {
5710 /* Nothing to be done for non-FDPIC. */
5712 }
5714 static bfd_boolean
5717 {
5724 {
5726 }
5728 {
5734 {
5746 {
5747 error:
5751 }
5759 {
5760 bfd_vma value =
5769 }
5770 }
5771 }
5773 {
5777 }
5781 {
5793 {
5794 Elf_Internal_Dyn dyn;
5799 {
5821 }
5822 }
5823 }
5826 }
5828 /* Adjust a symbol defined by a dynamic object and referenced by a
5829 regular object. */
5831 static bfd_boolean
5832 elf32_frvfdpic_adjust_dynamic_symbol
5835 {
5840 /* Make sure we know what is going on here. */
5847 /* If this is a weak symbol, and there is a real definition, the
5848 processor independent code will have arranged for us to see the
5849 real definition first, and we can just use the same value. */
5851 {
5856 }
5859 }
5861 /* Perform any actions needed for dynamic symbols. */
5863 static bfd_boolean
5864 elf32_frvfdpic_finish_dynamic_symbol
5869 {
5871 }
5873 /* Decide whether to attempt to turn absptr or lsda encodings in
5874 shared libraries into pcrel within the given input section. */
5876 static bfd_boolean
5877 frvfdpic_elf_use_relative_eh_frame
5881 {
5882 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
5884 }
5886 /* Adjust the contents of an eh_frame_hdr section before they're output. */
5888 static bfd_byte
5894 {
5906 == (_frvfdpic_osec_to_segment
5915 }
5917 /* Look through the relocs for a section during the first phase.
5919 Besides handling virtual table relocs for gc, we have to deal with
5920 all sorts of PIC-related relocations. We describe below the
5921 general plan on how to handle such relocations, even though we only
5922 collect information at this point, storing them in hash tables for
5923 perusal of later passes.
5925 32 relocations are propagated to the linker output when creating
5926 position-independent output. LO16 and HI16 relocations are not
5927 supposed to be encountered in this case.
5929 LABEL16 should always be resolvable by the linker, since it's only
5930 used by branches.
5932 LABEL24, on the other hand, is used by calls. If it turns out that
5933 the target of a call is a dynamic symbol, a PLT entry must be
5934 created for it, which triggers the creation of a private function
5935 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
5937 GPREL relocations require the referenced symbol to be in the same
5938 segment as _gp, but this can only be checked later.
5940 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
5941 exist. LABEL24 might as well, since it may require a PLT entry,
5942 that will require a got.
5944 Non-FUNCDESC GOT relocations require a GOT entry to be created
5945 regardless of whether the symbol is dynamic. However, since a
5946 global symbol that turns out to not be exported may have the same
5947 address of a non-dynamic symbol, we don't assign GOT entries at
5948 this point, such that we can share them in this case. A relocation
5949 for the GOT entry always has to be created, be it to offset a
5950 private symbol by the section load address, be it to get the symbol
5951 resolved dynamically.
5953 FUNCDESC GOT relocations require a GOT entry to be created, and
5954 handled as if a FUNCDESC relocation was applied to the GOT entry in
5955 an object file.
5957 FUNCDESC relocations referencing a symbol that turns out to NOT be
5958 dynamic cause a private function descriptor to be created. The
5959 FUNCDESC relocation then decays to a 32 relocation that points at
5960 the private descriptor. If the symbol is dynamic, the FUNCDESC
5961 relocation is propagated to the linker output, such that the
5962 dynamic linker creates the canonical descriptor, pointing to the
5963 dynamically-resolved definition of the function.
5965 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
5966 symbols that are assigned to the same segment as the GOT, but we
5967 can only check this later, after we know the complete set of
5968 symbols defined and/or exported.
5970 FUNCDESC GOTOFF relocations require a function descriptor to be
5971 created and, unless lazy binding is disabled or the symbol is not
5972 dynamic, a lazy PLT entry. Since we can't tell at this point
5973 whether a symbol is going to be dynamic, we have to decide later
5974 whether to create a lazy PLT entry or bind the descriptor directly
5975 to the private function.
5977 FUNCDESC_VALUE relocations are not supposed to be present in object
5978 files, but they may very well be simply propagated to the linker
5979 output, since they have no side effect.
5982 A function descriptor always requires a FUNCDESC_VALUE relocation.
5983 Whether it's in .plt.rel or not depends on whether lazy binding is
5984 enabled and on whether the referenced symbol is dynamic.
5986 The existence of a lazy PLT requires the resolverStub lazy PLT
5987 entry to be present.
5990 As for assignment of GOT, PLT and lazy PLT entries, and private
5991 descriptors, we might do them all sequentially, but we can do
5992 better than that. For example, we can place GOT entries and
5993 private function descriptors referenced using 12-bit operands
5994 closer to the PIC register value, such that these relocations don't
5995 overflow. Those that are only referenced with LO16 relocations
5996 could come next, but we may as well place PLT-required function
5997 descriptors in the 12-bit range to make them shorter. Symbols
5998 referenced with LO16/HI16 may come next, but we may place
5999 additional function descriptors in the 16-bit range if we can
6000 reliably tell that we've already placed entries that are ever
6001 referenced with only LO16. PLT entries are therefore generated as
6002 small as possible, while not introducing relocation overflows in
6003 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6004 generated before or after PLT entries, but not intermingled with
6005 them, such that we can have more lazy PLT entries in range for a
6006 branch to the resolverStub. The resolverStub should be emitted at
6007 the most distant location from the first lazy PLT entry such that
6008 it's still in range for a branch, or closer, if there isn't a need
6009 for so many lazy PLT entries. Additional lazy PLT entries may be
6010 emitted after the resolverStub, as long as branches are still in
6011 range. If the branch goes out of range, longer lazy PLT entries
6012 are emitted.
6014 We could further optimize PLT and lazy PLT entries by giving them
6015 priority in assignment to closer-to-gr17 locations depending on the
6016 number of occurrences of references to them (assuming a function
6017 that's called more often is more important for performance, so its
6018 PLT entry should be faster), or taking hints from the compiler.
6019 Given infinite time and money... :-) */
6021 static bfd_boolean
6026 {
6043 {
6050 else
6051 {
6057 /* PR15323, ref flags aren't set for references in the same
6058 object. */
6060 }
6063 {
6093 /* Fall through. */
6101 {
6105 }
6107 {
6110 }
6112 {
6115 {
6122 }
6123 picrel
6127 }
6128 else
6139 }
6142 {
6152 /* Fall through. */
6240 /* This relocation describes the C++ object vtable hierarchy.
6241 Reconstruct it for later use during GC. */
6247 /* This relocation describes which C++ vtable entries are actually
6248 used. Record for later use during GC. */
6270 bad_reloc:
6275 }
6276 }
6279 }
6281 \f
6282 /* Return the machine subcode from the ELF e_flags header. */
6284 static int
6286 {
6288 {
6298 }
6301 }
6303 /* Set the right machine number for a FRV ELF file. */
6305 static bfd_boolean
6307 {
6311 }
6312 \f
6313 /* Function to set the ELF flag bits. */
6315 static bfd_boolean
6317 {
6321 }
6323 /* Return true if the architecture described by elf header flag
6324 EXTENSION is an extension of the architecture described by BASE. */
6326 static bfd_boolean
6328 {
6332 /* CPU_GENERIC code can be merged with code for a specific
6333 architecture, in which case the result is marked as being
6334 for the specific architecture. Everything is therefore
6335 an extension of CPU_GENERIC. */
6348 }
6350 /* Merge backend specific data from an object file to the output
6351 object file when linking. */
6353 static bfd_boolean
6355 {
6369 #ifdef DEBUG
6373 #endif
6376 {
6379 }
6382 ;
6385 {
6386 /* Warn if different # of gprs are used. Note, 0 means nothing is
6387 said about the size of gprs. */
6391 ;
6394 ;
6399 else
6400 {
6402 {
6406 }
6409 {
6413 }
6414 }
6416 /* Warn if different # of fprs are used. Note, 0 means nothing is
6417 said about the size of fprs. */
6421 ;
6424 ;
6429 else
6430 {
6432 {
6437 }
6440 {
6445 }
6446 }
6448 /* Warn if different dword support was used. Note, 0 means nothing is
6449 said about the dword support. */
6453 ;
6456 ;
6461 else
6462 {
6464 {
6468 }
6471 {
6475 }
6476 }
6478 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6479 feature is used. */
6481 | EF_FRV_MEDIA
6482 | EF_FRV_MULADD
6485 /* If any module was compiled without -G0, clear the G0 bit. */
6489 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6493 /* We don't have to do anything if the pic flags are the same, or the new
6494 module(s) were compiled with -mlibrary-pic. */
6498 ;
6500 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6501 flags if any from the new module. */
6505 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6509 /* One module was compiled for pic and the other was not, see if we have
6510 had any relocations that are not pic-safe. */
6511 else
6512 {
6515 else
6516 {
6518 #ifndef FRV_NO_PIC_ERROR
6524 #endif
6525 }
6526 }
6528 /* Warn if different cpu is used (allow a specific cpu to override
6529 the generic cpu). */
6533 ;
6538 else
6539 {
6541 {
6552 }
6555 {
6566 }
6567 }
6569 /* Print out any mismatches from above. */
6571 {
6576 }
6578 /* Warn about any other mismatches */
6582 {
6588 }
6589 }
6591 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6595 /* Update the old flags now with changes made above. */
6603 {
6609 else
6613 }
6619 }
6621 \f
6622 static bfd_boolean
6624 {
6626 flagword flags;
6630 /* Print normal ELF private data. */
6637 {
6647 }
6650 {
6654 }
6657 {
6662 }
6665 {
6669 }
6700 }
6702 \f
6703 /* Support for core dump NOTE sections. */
6705 static bfd_boolean
6707 {
6712 {
6716 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6717 hardcoded offsets and sizes listed below (and contained within
6718 this lexical block) refer to fields in the target's elf_prstatus
6719 struct. */
6721 /* `pr_cursig' is at offset 12. */
6724 /* `pr_pid' is at offset 24. */
6727 /* `pr_reg' is at offset 72. */
6730 /* Most grok_prstatus implementations set `raw_size' to the size
6731 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6732 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6733 and `pr_interp_fdpic_loadmap', both of which (by design)
6734 immediately follow `pr_reg'. This will allow these fields to
6735 be viewed by GDB as registers.
6737 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6738 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6742 }
6744 /* Make a ".reg/999" section. */
6747 }
6749 static bfd_boolean
6751 {
6753 {
6757 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6760 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6764 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6767 }
6769 /* Note that for some reason, a spurious space is tacked
6770 onto the end of the args in some (at least one anyway)
6771 implementations, so strip it off if it exists. */
6773 {
6779 }
6782 }
6783 #define ELF_ARCH bfd_arch_frv
6784 #define ELF_TARGET_ID FRV_ELF_DATA
6785 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6786 #define ELF_MAXPAGESIZE 0x1000
6788 #define TARGET_BIG_SYM frv_elf32_vec
6791 #define elf_info_to_howto frv_info_to_howto_rela
6792 #define elf_backend_relocate_section elf32_frv_relocate_section
6793 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6794 #define elf_backend_check_relocs elf32_frv_check_relocs
6795 #define elf_backend_object_p elf32_frv_object_p
6796 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
6798 #define elf_backend_stack_align 8
6799 #define elf_backend_can_gc_sections 1
6800 #define elf_backend_rela_normal 1
6802 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
6803 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
6804 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
6805 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
6806 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
6808 #define elf_backend_want_got_sym 1
6809 #define elf_backend_got_header_size 0
6810 #define elf_backend_want_got_plt 0
6811 #define elf_backend_plt_readonly 1
6812 #define elf_backend_want_plt_sym 0
6813 #define elf_backend_plt_header_size 0
6815 #define elf_backend_finish_dynamic_sections \
6816 elf32_frv_finish_dynamic_sections
6818 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
6819 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
6823 #undef ELF_MAXPAGESIZE
6824 #define ELF_MAXPAGESIZE 0x4000
6826 #undef TARGET_BIG_SYM
6827 #define TARGET_BIG_SYM frv_elf32_fdpic_vec
6828 #undef TARGET_BIG_NAME
6830 #undef elf32_bed
6831 #define elf32_bed elf32_frvfdpic_bed
6833 #undef elf_info_to_howto_rel
6834 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
6836 #undef bfd_elf32_bfd_link_hash_table_create
6837 #define bfd_elf32_bfd_link_hash_table_create \
6838 frvfdpic_elf_link_hash_table_create
6839 #undef elf_backend_always_size_sections
6840 #define elf_backend_always_size_sections \
6841 elf32_frvfdpic_always_size_sections
6843 #undef elf_backend_create_dynamic_sections
6844 #define elf_backend_create_dynamic_sections \
6845 elf32_frvfdpic_create_dynamic_sections
6846 #undef elf_backend_adjust_dynamic_symbol
6847 #define elf_backend_adjust_dynamic_symbol \
6848 elf32_frvfdpic_adjust_dynamic_symbol
6849 #undef elf_backend_size_dynamic_sections
6850 #define elf_backend_size_dynamic_sections \
6851 elf32_frvfdpic_size_dynamic_sections
6852 #undef bfd_elf32_bfd_relax_section
6853 #define bfd_elf32_bfd_relax_section \
6854 elf32_frvfdpic_relax_section
6855 #undef elf_backend_finish_dynamic_symbol
6856 #define elf_backend_finish_dynamic_symbol \
6857 elf32_frvfdpic_finish_dynamic_symbol
6858 #undef elf_backend_finish_dynamic_sections
6859 #define elf_backend_finish_dynamic_sections \
6860 elf32_frvfdpic_finish_dynamic_sections
6862 #undef elf_backend_discard_info
6863 #define elf_backend_discard_info \
6864 frvfdpic_elf_discard_info
6865 #undef elf_backend_can_make_relative_eh_frame
6866 #define elf_backend_can_make_relative_eh_frame \
6867 frvfdpic_elf_use_relative_eh_frame
6868 #undef elf_backend_can_make_lsda_relative_eh_frame
6869 #define elf_backend_can_make_lsda_relative_eh_frame \
6870 frvfdpic_elf_use_relative_eh_frame
6871 #undef elf_backend_encode_eh_address
6872 #define elf_backend_encode_eh_address \
6873 frvfdpic_elf_encode_eh_address
6875 #undef elf_backend_may_use_rel_p
6876 #define elf_backend_may_use_rel_p 1
6877 #undef elf_backend_may_use_rela_p
6878 #define elf_backend_may_use_rela_p 1
6879 /* We use REL for dynamic relocations only. */
6880 #undef elf_backend_default_use_rela_p
6881 #define elf_backend_default_use_rela_p 1
6883 #undef elf_backend_omit_section_dynsym
6884 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym