| blob | 788c2997e8deb07c06d2c0055b620d87ea039887 |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
30 /* Forward declarations. */
34 {
35 /* This reloc does nothing. */
50 /* A 32 bit absolute relocation. */
65 /* A 16 bit pc-relative relocation. */
80 /* A 24-bit pc-relative relocation. */
193 /* A 12-bit signed operand with the GOT offset for the address of
194 the symbol. */
209 /* The upper 16 bits of the GOT offset for the address of the
210 symbol. */
225 /* The lower 16 bits of the GOT offset for the address of the
226 symbol. */
241 /* The 32-bit address of the canonical descriptor of a function. */
256 /* A 12-bit signed operand with the GOT offset for the address of
257 canonical descriptor of a function. */
272 /* The upper 16 bits of the GOT offset for the address of the
273 canonical descriptor of a function. */
288 /* The lower 16 bits of the GOT offset for the address of the
289 canonical descriptor of a function. */
304 /* The 64-bit descriptor of a function. */
319 /* A 12-bit signed operand with the GOT offset for the address of
320 canonical descriptor of a function. */
335 /* The upper 16 bits of the GOT offset for the address of the
336 canonical descriptor of a function. */
351 /* The lower 16 bits of the GOT offset for the address of the
352 canonical descriptor of a function. */
367 /* A 12-bit signed operand with the GOT offset for the address of
368 the symbol. */
383 /* The upper 16 bits of the GOT offset for the address of the
384 symbol. */
399 /* The lower 16 bits of the GOT offset for the address of the
400 symbol. */
415 /* A 24-bit pc-relative relocation referencing the TLS PLT entry for
416 a thread-local symbol. If the symbol number is 0, it refers to
417 the module. */
432 /* A 64-bit TLS descriptor for a symbol. This relocation is only
433 valid as a REL, dynamic relocation. */
448 /* A 12-bit signed operand with the GOT offset for the TLS
449 descriptor of the symbol. */
464 /* The upper 16 bits of the GOT offset for the TLS descriptor of the
465 symbol. */
480 /* The lower 16 bits of the GOT offset for the TLS descriptor of the
481 symbol. */
496 /* A 12-bit signed operand with the offset from the module base
497 address to the thread-local symbol address. */
512 /* The upper 16 bits of the offset from the module base address to
513 the thread-local symbol address. */
528 /* The lower 16 bits of the offset from the module base address to
529 the thread-local symbol address. */
544 /* A 12-bit signed operand with the GOT offset for the TLSOFF entry
545 for a symbol. */
560 /* The upper 16 bits of the GOT offset for the TLSOFF entry for a
561 symbol. */
576 /* The lower 16 bits of the GOT offset for the TLSOFF entry for a
577 symbol. */
592 /* The 32-bit offset from the thread pointer (not the module base
593 address) to a thread-local symbol. */
608 /* An annotation for linker relaxation, that denotes the
609 symbol+addend whose TLS descriptor is referenced by the sum of
610 the two input registers of an ldd instruction. */
625 /* An annotation for linker relaxation, that denotes the
626 symbol+addend whose TLS resolver entry point is given by the sum
627 of the two register operands of an calll instruction. */
642 /* An annotation for linker relaxation, that denotes the
643 symbol+addend whose TLS offset GOT entry is given by the sum of
644 the two input registers of an ld instruction. */
659 /* A 32-bit offset from the module base address to
660 the thread-local symbol address. */
674 };
676 /* GNU extension to record C++ vtable hierarchy. */
692 /* GNU extension to record C++ vtable member usage. */
708 /* The following 3 relocations are REL. The only difference to the
709 entries in the table above are that partial_inplace is TRUE. */
756 /* A 64-bit TLS descriptor for a symbol. The first word resolves to
757 an entry point, and the second resolves to a special argument.
758 If the symbol turns out to be in static TLS, the entry point is a
759 return instruction, and the special argument is the TLS offset
760 for the symbol. If it's in dynamic TLS, the entry point is a TLS
761 offset resolver, and the special argument is a pointer to a data
762 structure allocated by the dynamic loader, containing the GOT
763 address for the offset resolver, the module id, the offset within
764 the module, and anything else the TLS offset resolver might need
765 to determine the TLS offset for the symbol in the running
766 thread. */
782 /* The 32-bit offset from the thread pointer (not the module base
783 address) to a thread-local symbol. */
799 \f
801 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_frvfdpic_vec)
803 /* An extension of the elf hash table data structure, containing some
804 additional FRV-specific data. */
805 struct frvfdpic_elf_link_hash_table
806 {
809 /* A pointer to the .got section. */
811 /* A pointer to the .rel.got section. */
813 /* A pointer to the .rofixup section. */
815 /* A pointer to the .plt section. */
817 /* A pointer to the .rel.plt section. */
819 /* GOT base offset. */
820 bfd_vma got0;
821 /* Location of the first non-lazy PLT entry, i.e., the number of
822 bytes taken by lazy PLT entries. If locally-bound TLS
823 descriptors require a ret instruction, it will be placed at this
824 offset. */
825 bfd_vma plt0;
826 /* A hash table holding information about which symbols were
827 referenced with which PIC-related relocations. */
829 /* Summary reloc information collected by
830 _frvfdpic_count_got_plt_entries. */
832 };
834 /* Get the FRV ELF linker hash table from a link_info structure. */
836 #define frvfdpic_hash_table(p) \
837 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
838 == FRV_ELF_DATA ? ((struct frvfdpic_elf_link_hash_table *) ((p)->hash)) : NULL)
840 #define frvfdpic_got_section(info) \
841 (frvfdpic_hash_table (info)->sgot)
842 #define frvfdpic_gotrel_section(info) \
843 (frvfdpic_hash_table (info)->sgotrel)
844 #define frvfdpic_gotfixup_section(info) \
845 (frvfdpic_hash_table (info)->sgotfixup)
846 #define frvfdpic_plt_section(info) \
847 (frvfdpic_hash_table (info)->splt)
848 #define frvfdpic_pltrel_section(info) \
849 (frvfdpic_hash_table (info)->spltrel)
850 #define frvfdpic_relocs_info(info) \
851 (frvfdpic_hash_table (info)->relocs_info)
852 #define frvfdpic_got_initial_offset(info) \
853 (frvfdpic_hash_table (info)->got0)
854 #define frvfdpic_plt_initial_offset(info) \
855 (frvfdpic_hash_table (info)->plt0)
856 #define frvfdpic_dynamic_got_plt_info(info) \
857 (frvfdpic_hash_table (info)->g)
859 /* Currently it's the same, but if some day we have a reason to change
860 it, we'd better be using a different macro.
862 FIXME: if there's any TLS PLT entry that uses local-exec or
863 initial-exec models, we could use the ret at the end of any of them
864 instead of adding one more. */
865 #define frvfdpic_plt_tls_ret_offset(info) \
866 (frvfdpic_plt_initial_offset (info))
868 /* The name of the dynamic interpreter. This is put in the .interp
869 section. */
873 #define DEFAULT_STACK_SIZE 0x20000
875 /* This structure is used to collect the number of entries present in
876 each addressable range of the got. */
877 struct _frvfdpic_dynamic_got_info
878 {
879 /* Several bits of information about the current link. */
881 /* Total GOT size needed for GOT entries within the 12-, 16- or 32-bit
882 ranges. */
884 /* Total GOT size needed for function descriptor entries within the 12-,
885 16- or 32-bit ranges. */
887 /* Total GOT size needed by function descriptor entries referenced
888 in PLT entries, that would be profitable to place in offsets
889 close to the PIC register. */
890 bfd_vma fdplt;
891 /* Total PLT size needed by lazy PLT entries. */
892 bfd_vma lzplt;
893 /* Total GOT size needed for TLS descriptor entries within the 12-,
894 16- or 32-bit ranges. */
896 /* Total GOT size needed by TLS descriptors referenced in PLT
897 entries, that would be profitable to place in offers close to the
898 PIC register. */
899 bfd_vma tlsdplt;
900 /* Total PLT size needed by TLS lazy PLT entries. */
901 bfd_vma tlslzplt;
902 /* Number of relocations carried over from input object files. */
904 /* Number of fixups introduced by relocations in input object files. */
906 /* The number of fixups that reference the ret instruction added to
907 the PLT for locally-resolved TLS descriptors. */
909 };
911 /* This structure is used to assign offsets to got entries, function
912 descriptors, plt entries and lazy plt entries. */
914 struct _frvfdpic_dynamic_got_plt_info
915 {
916 /* Summary information collected with _frvfdpic_count_got_plt_entries. */
919 /* For each addressable range, we record a MAX (positive) and MIN
920 (negative) value. CUR is used to assign got entries, and it's
921 incremented from an initial positive value to MAX, then from MIN
922 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
923 assign function descriptors, and it's decreased from an initial
924 non-positive value to MIN, then from MAX down to CUR (unless CUR
925 wraps around first). All of MIN, MAX, CUR and FDCUR always point
926 to even words. ODD, if non-zero, indicates an odd word to be
927 used for the next got entry, otherwise CUR is used and
928 incremented by a pair of words, wrapping around when it reaches
929 MAX. FDCUR is decremented (and wrapped) before the next function
930 descriptor is chosen. FDPLT indicates the number of remaining
931 slots that can be used for function descriptors used only by PLT
932 entries.
934 TMAX, TMIN and TCUR are used to assign TLS descriptors. TCUR
935 starts as MAX, and grows up to TMAX, then wraps around to TMIN
936 and grows up to MIN. TLSDPLT indicates the number of remaining
937 slots that can be used for TLS descriptors used only by TLS PLT
938 entries. */
939 struct _frvfdpic_dynamic_got_alloc_data
940 {
945 };
947 /* Create an FRV ELF linker hash table. */
951 {
960 _bfd_elf_link_hash_newfunc,
962 FRV_ELF_DATA))
963 {
966 }
969 }
971 /* Decide whether a reference to a symbol can be resolved locally or
972 not. If the symbol is protected, we want the local address, but
973 its function descriptor must be assigned by the dynamic linker. */
974 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
975 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
976 || ! elf_hash_table (INFO)->dynamic_sections_created)
977 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
978 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
980 /* This structure collects information on what kind of GOT, PLT or
981 function descriptors are required by relocations that reference a
982 certain symbol. */
983 struct frvfdpic_relocs_info
984 {
985 /* The index of the symbol, as stored in the relocation r_info, if
986 we have a local symbol; -1 otherwise. */
988 union
989 {
990 /* The input bfd in which the symbol is defined, if it's a local
991 symbol. */
993 /* If symndx == -1, the hash table entry corresponding to a global
994 symbol (even if it turns out to bind locally, in which case it
995 should ideally be replaced with section's symndx + addend). */
998 /* The addend of the relocation that references the symbol. */
999 bfd_vma addend;
1001 /* The fields above are used to identify an entry. The fields below
1002 contain information on how an entry is used and, later on, which
1003 locations it was assigned. */
1004 /* The following 3 fields record whether the symbol+addend above was
1005 ever referenced with a GOT relocation. The 12 suffix indicates a
1006 GOT12 relocation; los is used for GOTLO relocations that are not
1007 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1008 pairs. */
1012 /* Whether a FUNCDESC relocation references symbol+addend. */
1014 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1018 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1022 /* Whether a GETTLSOFF relocation references symbol+addend. */
1024 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1025 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1026 We might instead just pre-compute flags telling whether the
1027 object is suitable for local exec, initial exec or general
1028 dynamic addressing, and use that all over the place. We could
1029 also try to do a better job of merging TLSOFF and TLSDESC entries
1030 in main executables, but perhaps we can get rid of TLSDESC
1031 entirely in them instead. */
1032 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1036 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1040 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1041 GOTOFFHI relocations. The addend doesn't really matter, since we
1042 envision that this will only be used to check whether the symbol
1043 is mapped to the same segment as the got. */
1045 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1047 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1048 relocation. */
1050 /* Whether we need a PLT entry for a symbol. Should be implied by
1051 something like:
1052 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1054 /* Whether a function descriptor should be created in this link unit
1055 for symbol+addend. Should be implied by something like:
1056 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1057 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1058 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1060 /* Whether a lazy PLT entry is needed for this symbol+addend.
1061 Should be implied by something like:
1062 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1063 && ! (info->flags & DF_BIND_NOW)) */
1065 /* Whether we've already emitted GOT relocations and PLT entries as
1066 needed for this symbol. */
1069 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1070 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1071 symbol+addend. */
1074 /* The number of .rofixups entries and dynamic relocations allocated
1075 for this symbol, minus any that might have already been used. */
1078 /* The offsets of the GOT entries assigned to symbol+addend, to the
1079 function descriptor's address, and to a function descriptor,
1080 respectively. Should be zero if unassigned. The offsets are
1081 counted from the value that will be assigned to the PIC register,
1082 not from the beginning of the .got section. */
1084 /* The offsets of the PLT entries assigned to symbol+addend,
1085 non-lazy and lazy, respectively. If unassigned, should be
1086 (bfd_vma)-1. */
1088 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1090 /* The offset of the TLS offset PLT entry. */
1091 bfd_vma tlsplt_entry;
1092 };
1094 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1095 static hashval_t
1097 {
1103 }
1105 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1106 identical. */
1107 static int
1109 {
1115 }
1117 /* Find or create an entry in a hash table HT that matches the key
1118 fields of the given ENTRY. If it's not found, memory for a new
1119 entry is allocated in ABFD's obstack. */
1125 {
1148 }
1150 /* Obtain the address of the entry in HT associated with H's symbol +
1151 addend, creating a new entry if none existed. ABFD is only used
1152 for memory allocation purposes. */
1157 bfd_vma addend,
1159 {
1167 }
1169 /* Obtain the address of the entry in HT associated with the SYMNDXth
1170 local symbol of the input bfd ABFD, plus the addend, creating a new
1171 entry if none existed. */
1176 bfd_vma addend,
1178 {
1186 }
1188 /* Merge fields set by check_relocs() of two entries that end up being
1189 mapped to the same (presumably global) symbol. */
1194 {
1215 }
1217 /* Every block of 65535 lazy PLT entries shares a single call to the
1218 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1219 32767, counting from 0). All other lazy PLT entries branch to it
1220 in a single instruction. */
1222 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1223 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1225 /* Add a dynamic relocation to the SRELOC section. */
1231 {
1232 Elf_Internal_Rela outrel;
1233 bfd_vma reloc_offset;
1245 /* If the entry's index is zero, this relocation was probably to a
1246 linkonce section that got discarded. We reserved a dynamic
1247 relocation, but it was for another entry than the one we got at
1248 the time of emitting the relocation. Unfortunately there's no
1249 simple way for us to catch this situation, since the relocation
1250 is cleared right before calling relocate_section, at which point
1251 we no longer know what the relocation used to point to. */
1253 {
1256 }
1259 }
1261 /* Add a fixup to the ROFIXUP section. */
1263 static bfd_vma
1266 {
1267 bfd_vma fixup_offset;
1274 {
1277 }
1281 {
1282 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1283 above. */
1286 }
1289 }
1291 /* Find the segment number in which OSEC, and output section, is
1292 located. */
1294 static unsigned
1296 {
1300 }
1304 {
1308 }
1310 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1312 /* Return the base VMA address which should be subtracted from real addresses
1313 when resolving TLSMOFF relocation.
1314 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1316 static bfd_vma
1318 {
1319 /* If tls_sec is NULL, we should have signalled an error already. */
1323 }
1325 /* Generate relocations for GOT entries, function descriptors, and
1326 code for PLT and lazy PLT entries. */
1334 bfd_vma addend)
1336 {
1346 {
1347 /* If the symbol is dynamic, consider it for dynamic
1348 relocations, otherwise decay to section + offset. */
1351 else
1352 {
1358 else
1360 }
1361 }
1363 /* Generate relocation for GOT entry pointing to the symbol. */
1365 {
1369 /* If the symbol is dynamic but binds locally, use
1370 section+offset. */
1373 {
1376 else
1381 else
1383 }
1385 /* If we're linking an executable at a fixed address, we can
1386 omit the dynamic relocation as long as the symbol is local to
1387 this module. */
1391 {
1399 ->vma
1403 }
1404 else
1406 _bfd_elf_section_offset
1420 }
1422 /* Generate relocation for GOT entry pointing to a canonical
1423 function descriptor. */
1425 {
1432 {
1433 /* If the symbol is dynamic and there may be dynamic symbol
1434 resolution because we are, or are linked with, a shared
1435 library, emit a FUNCDESC relocation such that the dynamic
1436 linker will allocate the function descriptor. If the
1437 symbol needs a non-local function descriptor but binds
1438 locally (e.g., its visibility is protected, emit a
1439 dynamic relocation decayed to section+offset. */
1444 {
1450 }
1453 {
1458 {
1465 }
1466 }
1467 else
1468 {
1469 /* Otherwise, we know we have a private function descriptor,
1470 so reference it directly. */
1478 }
1480 /* If there is room for dynamic symbol resolution, emit the
1481 dynamic relocation. However, if we're linking an
1482 executable at a fixed location, we won't have emitted a
1483 dynamic symbol entry for the got section, so idx will be
1484 zero, which means we can and should compute the address
1485 of the private descriptor ourselves. */
1489 {
1496 ->output_offset
1499 }
1500 else
1503 _bfd_elf_section_offset
1513 }
1519 }
1521 /* Generate relocation to fill in a private function descriptor in
1522 the GOT. */
1524 {
1527 bfd_vma ofst;
1530 /* If the symbol is dynamic but binds locally, use
1531 section+offset. */
1534 {
1537 else
1542 else
1544 }
1546 /* If we're linking an executable at a fixed address, we can
1547 omit the dynamic relocation as long as the symbol is local to
1548 this module. */
1551 {
1557 {
1563 ->output_offset
1571 ->output_offset
1574 }
1575 }
1576 else
1577 {
1578 ofst =
1580 entry->lazyplt
1583 _bfd_elf_section_offset
1593 }
1595 /* If we've omitted the dynamic relocation, just emit the fixed
1596 addresses of the symbol and of the local GOT base offset. */
1598 {
1603 }
1605 {
1607 {
1614 }
1618 /* A function descriptor used for lazy or local resolving is
1619 initialized such that its high word contains the output
1620 section index in which the PLT entries are located, and
1621 the low word contains the address of the lazy PLT entry
1622 entry point, that must be within the memory region
1623 assigned to that section. */
1627 highword = _frvfdpic_osec_to_segment
1629 }
1630 else
1631 {
1632 /* A function descriptor for a local function gets the index
1633 of the section. For a non-local function, it's
1634 disregarded. */
1640 else
1641 highword = _frvfdpic_osec_to_segment
1643 }
1653 }
1655 /* Generate code for the PLT entry. */
1657 {
1663 /* Figure out what kind of PLT entry we need, depending on the
1664 location of the function descriptor within the GOT. */
1667 {
1668 /* lddi @(gr15, fd_entry), gr14 */
1671 plt_code);
1673 }
1674 else
1675 {
1678 {
1679 /* setlos lo(fd_entry), gr14 */
1681 0x9cfc0000
1683 plt_code);
1685 }
1686 else
1687 {
1688 /* sethi.p hi(fd_entry), gr14
1689 setlo lo(fd_entry), gr14 */
1691 0x1cf80000
1694 plt_code);
1697 0x9cf40000
1699 plt_code);
1701 }
1702 /* ldd @(gr14,gr15),gr14 */
1705 }
1706 /* jmpl @(gr14,gr0) */
1708 }
1710 /* Generate code for the lazy PLT entry. */
1712 {
1715 bfd_vma resolverStub_addr;
1726 {
1727 /* This is a lazy PLT entry that includes a resolver call. */
1728 /* ldd @(gr15,gr0), gr4
1729 jmpl @(gr4,gr0) */
1732 }
1733 else
1734 {
1735 /* bra resolverStub */
1737 0xc01a0000
1740 lzplt_code);
1741 }
1742 }
1744 /* Generate relocation for GOT entry holding the TLS offset. */
1746 {
1752 {
1753 /* If the symbol is dynamic but binds locally, use
1754 section+offset. */
1756 {
1759 else
1765 else
1767 }
1768 }
1770 /* *ABS*+addend is special for TLS relocations, use only the
1771 addend. */
1776 ;
1777 /* If we're linking an executable, we can entirely omit the
1778 dynamic relocation if the symbol is local to this module. */
1782 {
1785 }
1786 else
1787 {
1791 {
1793 {
1798 }
1801 }
1803 _bfd_elf_section_offset
1813 }
1819 }
1822 {
1826 /* If the symbol is dynamic but binds locally, use
1827 section+offset. */
1830 {
1833 else
1838 else
1840 }
1842 /* If we didn't set up a TLS offset entry, but we're linking an
1843 executable and the symbol binds locally, we can use the
1844 module offset in the TLS descriptor in relaxations. */
1854 {
1855 /* *ABS*+addend is special for TLS relocations, use only the
1856 addend for the TLS offset, and take the module id as
1857 0. */
1861 ;
1862 /* For other TLS symbols that bind locally, add the section
1863 TLS offset to the addend. */
1880 ->output_offset
1886 /* We've used one of the reserved fixups, so discount it so
1887 that we can check at the end that we've used them
1888 all. */
1891 /* While at that, make sure the ret instruction makes to the
1892 right location in the PLT. We could do it only when we
1893 got to 0, but since the check at the end will only print
1894 a warning, make sure we have the ret in place in case the
1895 warning is missed. */
1899 }
1900 else
1901 {
1905 {
1907 {
1912 }
1915 }
1918 _bfd_elf_section_offset
1933 }
1939 }
1941 /* Generate code for the get-TLS-offset PLT entry. */
1943 {
1950 {
1954 /* sec may be NULL when referencing an undefweak symbol
1955 while linking a static executable. */
1957 {
1960 }
1961 else
1962 {
1965 else
1971 else
1973 }
1975 /* *ABS*+addend is special for TLS relocations, use only the
1976 addend for the TLS offset, and take the module id as
1977 0. */
1981 ;
1982 /* For other TLS symbols that bind locally, add the section
1983 TLS offset to the addend. */
1989 {
1990 /* setlos lo(ad), gr9 */
1992 0x92fc0000
1993 | (ad
1995 plt_code);
1997 }
1998 else
1999 {
2000 /* sethi.p hi(ad), gr9
2001 setlo lo(ad), gr9 */
2003 0x12f80000
2006 plt_code);
2009 0x92f40000
2010 | (ad
2012 plt_code);
2014 }
2015 /* ret */
2017 }
2019 {
2020 /* Figure out what kind of PLT entry we need, depending on the
2021 location of the TLS descriptor within the GOT. */
2024 {
2025 /* ldi @(gr15, tlsoff_entry), gr9 */
2029 plt_code);
2031 }
2032 else
2033 {
2036 {
2037 /* setlos lo(tlsoff_entry), gr8 */
2039 0x90fc0000
2042 plt_code);
2044 }
2045 else
2046 {
2047 /* sethi.p hi(tlsoff_entry), gr8
2048 setlo lo(tlsoff_entry), gr8 */
2050 0x10f80000
2053 plt_code);
2056 0x90f40000
2059 plt_code);
2061 }
2062 /* ld @(gr15,gr8),gr9 */
2065 }
2066 /* ret */
2068 }
2069 else
2070 {
2073 /* Figure out what kind of PLT entry we need, depending on the
2074 location of the TLS descriptor within the GOT. */
2077 {
2078 /* lddi @(gr15, tlsdesc_entry), gr8 */
2082 plt_code);
2084 }
2085 else
2086 {
2089 {
2090 /* setlos lo(tlsdesc_entry), gr8 */
2092 0x90fc0000
2095 plt_code);
2097 }
2098 else
2099 {
2100 /* sethi.p hi(tlsdesc_entry), gr8
2101 setlo lo(tlsdesc_entry), gr8 */
2103 0x10f80000
2106 plt_code);
2109 0x90f40000
2112 plt_code);
2114 }
2115 /* ldd @(gr15,gr8),gr8 */
2118 }
2119 /* jmpl @(gr8,gr0) */
2121 }
2122 }
2125 }
2127 /* Handle an FRV small data reloc. */
2129 static bfd_reloc_status_type
2135 bfd_vma value)
2136 {
2137 bfd_vma insn;
2138 bfd_vma gp;
2162 }
2164 /* Handle an FRV small data reloc. for the u12 field. */
2166 static bfd_reloc_status_type
2172 bfd_vma value)
2173 {
2174 bfd_vma insn;
2175 bfd_vma gp;
2177 bfd_vma mask;
2195 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2202 }
2204 /* Handle an FRV ELF HI16 reloc. */
2206 static bfd_reloc_status_type
2210 bfd_vma value)
2211 {
2212 bfd_vma insn;
2227 }
2228 static bfd_reloc_status_type
2232 bfd_vma value)
2233 {
2234 bfd_vma insn;
2248 }
2250 /* Perform the relocation for the CALL label24 instruction. */
2252 static bfd_reloc_status_type
2257 bfd_vma value)
2258 {
2259 bfd_vma insn;
2260 bfd_vma label6;
2261 bfd_vma label18;
2263 /* The format for the call instruction is:
2265 0 000000 0001111 000000000000000000
2266 label6 opcode label18
2268 The branch calculation is: pc + (4*label24)
2269 where label24 is the concatenation of label6 and label18. */
2271 /* Grab the instruction. */
2292 }
2294 static bfd_reloc_status_type
2300 bfd_vma value)
2301 {
2302 bfd_vma insn;
2303 bfd_vma gp;
2325 }
2327 static bfd_reloc_status_type
2333 bfd_vma value)
2334 {
2335 bfd_vma insn;
2336 bfd_vma gp;
2359 }
2363 bfd_reloc_code_real_type code)
2364 {
2366 {
2377 /* Fall through. */
2515 }
2518 }
2522 {
2527 i++)
2538 }
2540 /* Set the howto pointer for an FRV ELF reloc. */
2542 static void
2546 {
2551 {
2563 }
2564 }
2566 /* Set the howto pointer for an FRV ELF REL reloc. */
2567 static void
2570 {
2575 {
2599 }
2600 }
2601 \f
2602 /* Perform a single relocation. By default we use the standard BFD
2603 routines, but a few relocs, we have to do them ourselves. */
2605 static bfd_reloc_status_type
2611 bfd_vma relocation)
2612 {
2616 }
2618 \f
2619 /* Relocate an FRV ELF section.
2621 The RELOCATE_SECTION function is called by the new ELF backend linker
2622 to handle the relocations for a section.
2624 The relocs are always passed as Rela structures; if the section
2625 actually uses Rel structures, the r_addend field will always be
2626 zero.
2628 This function is responsible for adjusting the section contents as
2629 necessary, and (if using Rela relocs and generating a relocatable
2630 output file) adjusting the reloc addend as necessary.
2632 This function does not have to worry about setting the reloc
2633 address or the reloc symbol index.
2635 LOCAL_SYMS is a pointer to the swapped in local symbols.
2637 LOCAL_SECTIONS is an array giving the section in the input file
2638 corresponding to the st_shndx field of each local symbol.
2640 The global hash table entry for the global symbols can be found
2641 via elf_sym_hashes (input_bfd).
2643 When generating relocatable output, this function must handle
2644 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2645 going to be the section symbol corresponding to the output
2646 section, which means that the addend must be adjusted
2647 accordingly. */
2649 static bfd_boolean
2658 {
2678 else
2684 else
2690 else
2695 else
2699 {
2705 bfd_vma relocation;
2706 bfd_reloc_status_type r;
2726 {
2731 name = bfd_elf_string_from_elf_section
2735 }
2736 else
2737 {
2738 bfd_boolean warned;
2739 bfd_boolean unresolved_reloc;
2747 }
2761 {
2764 }
2767 {
2807 else
2808 /* In order to find the entry we created before, we must
2809 use the original addend, not the one that may have been
2810 modified by _bfd_elf_rela_local_sym(). */
2820 {
2826 }
2831 non_fdpic:
2837 {
2843 }
2845 }
2848 {
2871 }
2873 /* Try to apply TLS relaxations. */
2876 {
2878 #define LOCAL_EXEC_P(info, picrel) \
2879 ((info)->executable \
2880 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2881 #define INITIAL_EXEC_P(info, picrel) \
2882 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2883 && (picrel)->tlsoff_entry)
2885 #define IN_RANGE_FOR_OFST12_P(value) \
2886 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2887 #define IN_RANGE_FOR_SETLOS_P(value) \
2888 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2889 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2890 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2892 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2893 (LOCAL_EXEC_P ((info), (picrel)) \
2894 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2895 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2896 (INITIAL_EXEC_P ((info), (picrel)) \
2897 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2899 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2900 (LOCAL_EXEC_P ((info), (picrel)))
2901 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2902 (INITIAL_EXEC_P ((info), (picrel)))
2904 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2905 (LOCAL_EXEC_P ((info), (picrel)) \
2906 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2911 /* Is this a call instruction? */
2913 {
2918 }
2922 {
2923 /* Replace the call instruction (except the packing bit)
2924 with setlos #tlsmofflo(symbol+offset), gr9. */
2932 }
2935 {
2936 /* Replace the call instruction (except the packing bit)
2937 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
2945 }
2952 /* Is this an lddi instruction? */
2954 {
2960 }
2965 info))
2966 {
2967 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
2968 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
2969 Preserve the packing bit. */
2979 }
2983 {
2984 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
2985 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
2986 Preserve the packing bit. */
2996 }
2999 {
3000 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3001 with ldi @(grB, #gottlsoff12(symbol+offset),
3002 gr<C+1>. Preserve the packing bit. If gottlsoff12
3003 overflows, we'll error out, but that's sort-of ok,
3004 since we'd started with gottlsdesc12, that's actually
3005 more demanding. Compiling with -fPIE instead of
3006 -fpie would fix it; linking with --relax should fix
3007 it as well. */
3016 }
3023 /* Is this a sethi instruction? */
3025 {
3031 }
3037 {
3038 /* Replace sethi with a nop. Preserve the packing bit. */
3043 /* Nothing to relocate. */
3045 }
3048 {
3049 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3053 }
3060 /* Is this a setlo or setlos instruction? */
3062 {
3068 }
3074 {
3075 /* Replace setlo/setlos with a nop. Preserve the
3076 packing bit. */
3081 /* Nothing to relocate. */
3083 }
3086 {
3087 /* If the corresponding sethi (if it exists) decayed
3088 to a nop, make sure this becomes (or already is) a
3089 setlos, not setlo. */
3091 {
3094 }
3096 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3100 }
3107 /* Is this an ldd instruction? */
3109 {
3115 }
3120 info))
3121 {
3122 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3123 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3124 Preserve the packing bit. */
3134 }
3138 {
3139 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3140 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3141 Preserve the packing bit. */
3151 }
3155 {
3156 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3157 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3158 Preserve the packing bit. */
3168 }
3171 {
3172 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3173 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3174 Preserve the packing bit. */
3180 /* #tlsoff(symbol+offset) is just a relaxation
3181 annotation, so there's nothing left to
3182 relocate. */
3184 }
3191 /* Is this a calll or callil instruction? */
3193 {
3199 }
3204 info))
3205 {
3206 /* Replace calll with a nop. Preserve the packing bit. */
3211 /* Nothing to relocate. */
3213 }
3217 {
3218 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3219 Preserve the packing bit. */
3227 }
3230 {
3231 /* Replace calll with a nop. Preserve the packing bit. */
3236 /* Nothing to relocate. */
3238 }
3245 /* Is this an ldi instruction? */
3247 {
3253 }
3257 {
3258 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3259 with setlos #tlsmofflo(symbol+offset), grC.
3260 Preserve the packing bit. */
3268 }
3275 /* Is this a sethi instruction? */
3277 {
3283 }
3289 {
3290 /* Replace sethi with a nop. Preserve the packing bit. */
3295 /* Nothing to relocate. */
3297 }
3304 /* Is this a setlo or setlos instruction? */
3306 {
3312 }
3318 {
3319 /* Replace setlo/setlos with a nop. Preserve the
3320 packing bit. */
3325 /* Nothing to relocate. */
3327 }
3334 /* Is this an ld instruction? */
3336 {
3342 }
3346 {
3347 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3348 with setlos #tlsmofflo(symbol+offset), grC.
3349 Preserve the packing bit. */
3357 }
3361 {
3362 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3363 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3364 Preserve the packing bit. */
3372 }
3379 /* Is this a sethi instruction? */
3381 {
3387 }
3390 info))
3391 {
3392 /* Replace sethi with a nop. Preserve the packing bit. */
3397 /* Nothing to relocate. */
3399 }
3406 /* Is this a setlo or setlos instruction? */
3408 {
3414 }
3417 info))
3418 /* If the corresponding sethi (if it exists) decayed
3419 to a nop, make sure this becomes (or already is) a
3420 setlos, not setlo. */
3421 {
3424 }
3428 /*
3429 There's nothing to relax in these:
3430 R_FRV_TLSDESC_VALUE
3431 R_FRV_TLSOFF
3432 R_FRV_TLSMOFF12
3433 R_FRV_TLSMOFFHI
3434 R_FRV_TLSMOFFLO
3435 R_FRV_TLSMOFF
3436 */
3440 }
3443 {
3449 {
3454 }
3455 /* We don't want to warn on calls to undefined weak symbols,
3456 as calls to them must be protected by non-NULL tests
3457 anyway, and unprotected calls would invoke undefined
3458 behavior. */
3462 else
3502 {
3508 {
3509 /* If the symbol is dynamic and there may be dynamic
3510 symbol resolution because we are or are linked with a
3511 shared library, emit a FUNCDESC relocation such that
3512 the dynamic linker will allocate the function
3513 descriptor. If the symbol needs a non-local function
3514 descriptor but binds locally (e.g., its visibility is
3515 protected, emit a dynamic relocation decayed to
3516 section+offset. */
3520 {
3525 }
3527 {
3529 {
3535 }
3537 }
3538 else
3539 {
3540 /* Otherwise, we know we have a private function
3541 descriptor, so reference it directly. */
3549 }
3551 /* If there is room for dynamic symbol resolution, emit
3552 the dynamic relocation. However, if we're linking an
3553 executable at a fixed location, we won't have emitted a
3554 dynamic symbol entry for the got section, so idx will
3555 be zero, which means we can and should compute the
3556 address of the private descriptor ourselves. */
3559 {
3564 {
3565 bfd_vma offset;
3568 input_section
3570 {
3576 }
3578 offset = _bfd_elf_section_offset
3584 frvfdpic_gotfixup_section
3586 offset + input_section
3589 picrel);
3590 }
3591 }
3595 {
3596 bfd_vma offset;
3599 input_section
3601 {
3607 }
3609 offset = _bfd_elf_section_offset
3616 offset + input_section
3620 }
3621 else
3623 }
3625 /* We want the addend in-place because dynamic
3626 relocations are REL. Setting relocation to it should
3627 arrange for it to be installed. */
3629 }
3635 {
3638 }
3639 /* Fall through. */
3641 {
3645 /* If the symbol is dynamic but binds locally, use
3646 section+offset. */
3648 {
3650 {
3656 }
3658 }
3659 else
3660 {
3663 else
3671 else
3673 }
3675 /* If we're linking an executable at a fixed address, we
3676 can omit the dynamic relocation as long as the symbol
3677 is defined in the current link unit (which is implied
3678 by its output section not being NULL). */
3681 {
3688 {
3690 input_section
3692 {
3697 }
3699 {
3700 bfd_vma offset = _bfd_elf_section_offset
3705 {
3707 frvfdpic_gotfixup_section
3709 offset + input_section
3712 picrel);
3714 _frvfdpic_add_rofixup
3717 offset
3720 }
3721 }
3722 }
3723 }
3724 else
3725 {
3729 {
3730 bfd_vma offset;
3733 input_section
3735 {
3741 }
3743 offset = _bfd_elf_section_offset
3750 offset + input_section
3754 }
3757 /* We want the addend in-place because dynamic
3758 relocations are REL. Setting relocation to it
3759 should arrange for it to be installed. */
3761 }
3764 {
3765 /* If we've omitted the dynamic relocation, just emit
3766 the fixed addresses of the symbol and of the local
3767 GOT base offset. */
3775 else
3776 /* A function descriptor used for lazy or local
3777 resolving is initialized such that its high word
3778 contains the output section index in which the
3779 PLT entries are located, and the low word
3780 contains the offset of the lazy PLT entry entry
3781 point into that section. */
3786 sec
3789 }
3790 }
3837 {
3840 }
3842 {
3846 }
3847 else
3866 /* These shouldn't be present in input object files. */
3873 /* These are just annotations for relaxation, nothing to do
3874 here. */
3883 }
3886 {
3887 /* If you take this out, remove the #error from fdpic-static-6.d
3888 in the ld testsuite. */
3889 /* This helps catch problems in GCC while we can't do more
3890 than static linking. The idea is to test whether the
3891 input file basename is crt0.o only once. */
3893 silence_segment_error =
3902 /* We don't want duplicate errors for undefined
3903 symbols. */
3906 {
3910 }
3914 }
3917 {
3920 /* We need the addend to be applied before we shift the
3921 value right. */
3923 /* Fall through. */
3930 /* Fall through. */
3944 }
3947 {
3951 /* Fall through. */
3953 /* When referencing a GOT entry, a function descriptor or a
3954 PLT, we don't want the addend to apply to the reference,
3955 but rather to the referenced symbol. The actual entry
3956 will have already been created taking the addend into
3957 account, so cancel it out here. */
3974 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
3975 here, since we do want to apply the addend to the others.
3976 Note that we've applied the addend to GOTOFFHI before we
3977 shifted it right. */
3985 }
4017 else
4022 {
4026 {
4053 }
4056 {
4061 }
4065 }
4066 }
4069 }
4070 \f
4071 /* Return the section that should be marked against GC for a given
4072 relocation. */
4080 {
4083 {
4087 }
4090 }
4091 \f
4092 /* Hook called by the linker routine which adds symbols from an object
4093 file. We use it to put .comm items in .scomm, and not .comm. */
4095 static bfd_boolean
4103 {
4107 {
4108 /* Common symbols less than or equal to -G nn bytes are
4109 automatically put into .sbss. */
4114 {
4116 (SEC_ALLOC
4117 | SEC_IS_COMMON
4121 }
4125 }
4128 }
4130 /* We need dynamic symbols for every section, since segments can
4131 relocate independently. */
4132 static bfd_boolean
4135 ATTRIBUTE_UNUSED,
4137 {
4139 {
4142 /* If sh_type is yet undecided, assume it could be
4143 SHT_PROGBITS/SHT_NOBITS. */
4147 /* There shouldn't be section relative relocations
4148 against any other section. */
4151 }
4152 }
4154 /* Create a .got section, as well as its additional info field. This
4155 is almost entirely copied from
4156 elflink.c:_bfd_elf_create_got_section(). */
4158 static bfd_boolean
4160 {
4169 /* This function may be called more than once. */
4174 /* Machine specific: although pointers are 32-bits wide, we want the
4175 GOT to be aligned to a 64-bit boundary, such that function
4176 descriptors in it can be accessed with 64-bit loads and
4177 stores. */
4190 {
4195 }
4198 {
4199 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4200 (or .got.plt) section. We don't do this in the linker script
4201 because we don't want to define the symbol if we are not creating
4202 a global offset table. */
4208 /* Machine-specific: we want the symbol for executables as
4209 well. */
4212 }
4214 /* The first bit of the global offset table is the header. */
4217 /* This is the machine-specific part. Create and initialize section
4218 data for the got. */
4220 {
4223 frvfdpic_relocs_info_hash,
4224 frvfdpic_relocs_info_eq,
4237 /* Machine-specific. */
4247 }
4248 else
4249 {
4252 }
4254 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4255 turns out that we're linking with a different linker script, the
4256 linker script will override it. */
4267 /* Machine-specific: we want the symbol for executables as well. */
4274 /* FDPIC supports Thread Local Storage, and this may require a
4275 procedure linkage table for TLS PLT entries. */
4277 /* This is mostly copied from
4278 elflink.c:_bfd_elf_create_dynamic_sections(). */
4291 /* FRV-specific: remember it. */
4294 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4295 .plt section. */
4297 {
4303 }
4305 /* FRV-specific: we want rel relocations for the plt. */
4311 /* FRV-specific: remember it. */
4315 }
4317 /* Make sure the got and plt sections exist, and that our pointers in
4318 the link hash table point to them. */
4320 static bfd_boolean
4322 {
4323 /* This is mostly copied from
4324 elflink.c:_bfd_elf_create_dynamic_sections(). */
4325 flagword flags;
4332 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4333 .rel[a].bss sections. */
4335 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4336 way. */
4340 /* FRV-specific: make sure we created everything we wanted. */
4347 {
4348 /* The .dynbss section is a place to put symbols which are defined
4349 by dynamic objects, are referenced by regular objects, and are
4350 not functions. We must allocate space for them in the process
4351 image and use a R_*_COPY reloc to tell the dynamic linker to
4352 initialize them at run time. The linker script puts the .dynbss
4353 section into the .bss section of the final image. */
4359 /* The .rel[a].bss section holds copy relocs. This section is not
4360 normally needed. We need to create it here, though, so that the
4361 linker will map it to an output section. We can't just create it
4362 only if we need it, because we will not know whether we need it
4363 until we have seen all the input files, and the first time the
4364 main linker code calls BFD after examining all the input files
4365 (size_dynamic_sections) the input sections have already been
4366 mapped to the output sections. If the section turns out not to
4367 be needed, we can discard it later. We will never need this
4368 section when generating a shared object, since they do not use
4369 copy relocs. */
4371 {
4379 }
4380 }
4383 }
4385 /* Compute the total GOT and PLT size required by each symbol in each
4386 range. Symbols may require up to 4 words in the GOT: an entry
4387 pointing to the symbol, an entry pointing to its function
4388 descriptor, and a private function descriptors taking two
4389 words. */
4391 static void
4394 {
4395 /* Allocate space for a GOT entry pointing to the symbol. */
4402 else
4406 /* Allocate space for a GOT entry pointing to the function
4407 descriptor. */
4414 else
4418 /* Decide whether we need a PLT entry, a function descriptor in the
4419 GOT, and a lazy PLT entry for this symbol. */
4433 /* Allocate space for a function descriptor. */
4442 else
4448 }
4450 /* Compute the total GOT size required by each TLS symbol in each
4451 range. Symbols may require up to 5 words in the GOT: an entry
4452 holding the TLS offset for the symbol, and an entry with a full TLS
4453 descriptor taking 4 words. */
4455 static void
4458 bfd_boolean subtract)
4459 {
4462 /* Allocate space for a GOT entry with the TLS offset of the
4463 symbol. */
4470 else
4474 /* If there's any TLSOFF relocation, mark the output file as not
4475 suitable for dlopening. This mark will remain even if we relax
4476 all such relocations, but this is not a problem, since we'll only
4477 do so for executables, and we definitely don't want anyone
4478 dlopening executables. */
4482 /* Allocate space for a TLS descriptor. */
4491 else
4494 }
4496 /* Compute the number of dynamic relocations and fixups that a symbol
4497 requires, and add (or subtract) from the grand and per-symbol
4498 totals. */
4500 static void
4503 bfd_boolean subtract)
4504 {
4508 {
4512 /* In the executable, TLS relocations to symbols that bind
4513 locally (including those that resolve to global TLS offsets)
4514 are resolved immediately, without any need for fixups or
4515 dynamic relocations. In shared libraries, however, we must
4516 emit dynamic relocations even for local symbols, because we
4517 don't know the module id the library is going to get at
4518 run-time, nor its TLS base offset. */
4523 }
4524 else
4525 {
4527 {
4533 }
4534 else
4535 {
4538 }
4542 {
4546 }
4547 else
4549 }
4552 {
4556 }
4563 }
4565 /* Look for opportunities to relax TLS relocations. We can assume
4566 we're linking the main executable or a static-tls library, since
4567 otherwise we wouldn't have got here. When relaxing, we have to
4568 first undo any previous accounting of TLS uses of fixups, dynamic
4569 relocations, GOT and PLT entries. */
4571 static void
4574 bfd_boolean relaxing)
4575 {
4582 {
4584 {
4588 }
4590 /* When linking an executable, we can always decay GOTTLSDESC to
4591 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4592 When linking a static-tls shared library, using TLSMOFF is
4593 not an option, but we can still use GOTTLSOFF. When decaying
4594 to GOTTLSOFF, we must keep the GOT entry in range. We know
4595 it has to fit because we'll be trading the 4 words of hte TLS
4596 descriptor for a single word in the same range. */
4600 {
4604 }
4607 }
4609 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4610 main executable. We have to check whether the symbol's TLSOFF is
4611 in range for a setlos. For symbols with a hash entry, we can
4612 determine exactly what to do; for others locals, we don't have
4613 addresses handy, so we use the size of the TLS section as an
4614 approximation. If we get it wrong, we'll retain a GOT entry
4615 holding the TLS offset (without dynamic relocations or fixups),
4616 but we'll still optimize away the loads from it. Since TLS sizes
4617 are generally very small, it's probably not worth attempting to
4618 do better than this. */
4624 /* The above may hold for an undefweak TLS symbol, so make
4625 sure we don't have this case before accessing def.value
4626 and def.section. */
4638 {
4640 {
4644 }
4648 }
4650 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4651 have a #gottlsoff12 relocation for this entry, or if we can fit
4652 one more in the 12-bit (and 16-bit) ranges. */
4655 || (relaxing
4660 {
4662 {
4666 }
4670 }
4673 {
4676 }
4679 }
4681 /* Compute the total GOT and PLT size required by each symbol in each range. *
4682 Symbols may require up to 4 words in the GOT: an entry pointing to
4683 the symbol, an entry pointing to its function descriptor, and a
4684 private function descriptors taking two words. */
4686 static int
4688 {
4696 else
4697 {
4700 }
4703 }
4705 /* Determine the positive and negative ranges to be used by each
4706 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4707 double-word boundary, are the minimum (negative) and maximum
4708 (positive) GOT offsets already used by previous ranges, except for
4709 an ODD entry that may have been left behind. GOT and FD indicate
4710 the size of GOT entries and function descriptors that must be
4711 placed within the range from -WRAP to WRAP. If there's room left,
4712 up to FDPLT bytes should be reserved for additional function
4713 descriptors. */
4717 bfd_signed_vma fdcur,
4718 bfd_signed_vma odd,
4719 bfd_signed_vma cur,
4720 bfd_vma got,
4721 bfd_vma fd,
4722 bfd_vma fdplt,
4723 bfd_vma tlsd,
4724 bfd_vma tlsdplt,
4725 bfd_vma wrap)
4726 {
4730 /* Start at the given initial points. */
4734 /* If we had an incoming odd word and we have any got entries that
4735 are going to use it, consume it, otherwise leave gad->odd at
4736 zero. We might force gad->odd to zero and return the incoming
4737 odd such that it is used by the next range, but then GOT entries
4738 might appear to be out of order and we wouldn't be able to
4739 shorten the GOT by one word if it turns out to end with an
4740 unpaired GOT entry. */
4742 {
4746 }
4747 else
4750 /* If we're left with an unpaired GOT entry, compute its location
4751 such that we can return it. Otherwise, if got doesn't require an
4752 odd number of words here, either odd was already zero in the
4753 block above, or it was set to zero because got was non-zero, or
4754 got was already zero. In the latter case, we want the value of
4755 odd to carry over to the return statement, so we don't want to
4756 reset odd unless the condition below is true. */
4758 {
4761 }
4763 /* Compute the tentative boundaries of this range. */
4768 /* If function descriptors took too much space, wrap some of them
4769 around. */
4771 {
4774 }
4776 /* If GOT entries took too much space, wrap some of them around.
4777 This may well cause gad->min to become lower than wrapmin. This
4778 will cause a relocation overflow later on, so we don't have to
4779 report it here . */
4781 {
4784 }
4786 /* Add TLS descriptors. */
4791 /* If TLS descriptors took too much space, wrap an integral number
4792 of them around. */
4794 {
4802 }
4804 /* If there is space left and we have function descriptors
4805 referenced in PLT entries that could take advantage of shorter
4806 offsets, place them now. */
4808 {
4809 bfd_vma fds;
4813 else
4820 }
4822 /* If there is more space left, try to place some more function
4823 descriptors for PLT entries. */
4825 {
4826 bfd_vma fds;
4830 else
4837 }
4839 /* If there is space left and we have TLS descriptors referenced in
4840 PLT entries that could take advantage of shorter offsets, place
4841 them now. */
4843 {
4844 bfd_vma tlsds;
4848 else
4854 }
4856 /* If there is more space left, try to place some more TLS
4857 descriptors for PLT entries. Although we could try to fit an
4858 additional TLS descriptor with half of it just before before the
4859 wrap point and another right past the wrap point, this might
4860 cause us to run out of space for the next region, so don't do
4861 it. */
4863 {
4864 bfd_vma tlsds;
4868 else
4874 }
4876 /* If odd was initially computed as an offset past the wrap point,
4877 wrap it around. */
4881 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4882 before returning, so do it here too. This guarantees that,
4883 should cur and fdcur meet at the wrap point, they'll both be
4884 equal to min. */
4888 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4894 }
4896 /* Compute the location of the next GOT entry, given the allocation
4897 data for a range. */
4901 {
4902 bfd_signed_vma ret;
4905 {
4906 /* If there was an odd word left behind, use it. */
4909 }
4910 else
4911 {
4912 /* Otherwise, use the word pointed to by cur, reserve the next
4913 as an odd word, and skip to the next pair of words, possibly
4914 wrapping around. */
4920 }
4923 }
4925 /* Compute the location of the next function descriptor entry in the
4926 GOT, given the allocation data for a range. */
4930 {
4931 /* If we're at the bottom, wrap around, and only then allocate the
4932 next pair of words. */
4936 }
4938 /* Compute the location of the next TLS descriptor entry in the GOT,
4939 given the allocation data for a range. */
4942 {
4943 bfd_signed_vma ret;
4949 /* If we're at the top of the region, wrap around to the bottom. */
4954 }
4956 /* Assign GOT offsets for every GOT entry and function descriptor.
4957 Doing everything in a single pass is tricky. */
4959 static int
4961 {
4982 {
4985 }
4989 {
4992 }
4994 {
4997 }
5011 {
5014 }
5018 {
5021 }
5023 {
5026 }
5031 }
5033 /* Assign GOT offsets to private function descriptors used by PLT
5034 entries (or referenced by 32-bit offsets), as well as PLT entries
5035 and lazy PLT entries. */
5037 static int
5039 {
5047 {
5050 /* We use the section's raw size to mark the location of the
5051 next PLT entry. */
5054 /* Figure out the length of this PLT entry based on the
5055 addressing mode we need to reach the function descriptor. */
5063 else
5067 }
5070 {
5073 /* If this entry is the one that gets the resolver stub, account
5074 for the additional instruction. */
5078 }
5081 {
5084 entry->tlsplt_entry
5090 {
5092 /* FIXME: here we use the size of the TLS section
5093 as an upper bound for the value of the TLS
5094 symbol, because we may not know the exact value
5095 yet. If we get it wrong, we'll just waste a
5096 word in the PLT, and we should never get even
5097 close to 32 KiB of TLS anyway. */
5102 else
5104 }
5106 {
5113 else
5115 }
5116 else
5117 {
5126 else
5128 }
5131 }
5134 }
5136 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5137 _frvfdpic_assign_plt_entries. */
5139 static int
5141 {
5154 }
5156 /* Follow indirect and warning hash entries so that each got entry
5157 points to the final symbol definition. P must point to a pointer
5158 to the hash table we're traversing. Since this traversal may
5159 modify the hash table, we set this pointer to NULL to indicate
5160 we've made a potentially-destructive change to the hash table, so
5161 the traversal must be restarted. */
5162 static int
5164 {
5169 {
5181 NO_INSERT);
5184 {
5185 /* Merge the two entries. */
5189 }
5193 /* If we can't find this entry with the new bfd hash, re-insert
5194 it, and get the traversal restarted. */
5196 {
5201 /* Abort the traversal, since the whole table may have
5202 moved, and leave it up to the parent to restart the
5203 process. */
5206 }
5207 }
5210 }
5212 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5213 section and the rofixup section. Assign locations for GOT and PLT
5214 entries. */
5216 static bfd_boolean
5219 {
5220 bfd_signed_vma odd;
5229 /* Compute the total size taken by entries in the 12-bit and 16-bit
5230 ranges, to tell how many PLT function descriptors we can bring
5231 into the 12-bit range without causing the 16-bit range to
5232 overflow. */
5238 else
5241 {
5244 }
5245 else
5250 /* Determine the ranges of GOT offsets that we can use for each
5251 range of addressing modes. */
5254 odd,
5258 limit,
5260 tlslimit,
5264 odd,
5276 odd,
5289 /* Now assign (most) GOT offsets. */
5291 gpinfop);
5295 /* If an odd word is the last word of the GOT, we don't need this
5296 word to be part of the GOT. */
5302 {
5305 }
5306 /* This will be non-NULL during relaxation. The assumption is that
5307 the size of one of these sections will never grow, only shrink,
5308 so we can use the larger buffer we allocated before. */
5310 {
5316 }
5319 /* Subtract the number of lzplt entries, since those will generate
5320 relocations in the pltrel section. */
5324 else
5329 {
5335 }
5341 {
5347 }
5350 {
5357 {
5363 }
5364 }
5366 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5367 such that there's room for the additional instruction needed to
5368 call the resolver. Since _frvfdpic_assign_got_entries didn't
5369 account for them, our block size is 4 bytes smaller than the real
5370 block size. */
5372 {
5376 }
5378 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5379 actually assign lazy PLT entries addresses. */
5382 /* Save information that we're going to need to generate GOT and PLT
5383 entries. */
5394 /* Allocate a ret statement at plt_initial_offset, to be used by
5395 locally-resolved TLS descriptors. */
5400 gpinfop);
5402 /* Allocate the PLT section contents only after
5403 _frvfdpic_assign_plt_entries has a chance to add the size of the
5404 non-lazy PLT entries. */
5406 {
5410 {
5416 }
5417 }
5420 }
5422 /* Set the sizes of the dynamic sections. */
5424 static bfd_boolean
5427 {
5436 {
5437 /* Set the contents of the .interp section to the interpreter. */
5439 {
5444 }
5445 }
5451 {
5458 }
5463 /* Allocate space to save the summary information, we're going to
5464 use it if we're doing relaxations. */
5471 {
5488 }
5491 }
5493 static bfd_boolean
5496 {
5503 }
5505 /* Check whether any of the relocations was optimized away, and
5506 subtract it from the relocation or fixup count. */
5507 static bfd_boolean
5512 {
5526 /* Now examine each relocation. */
5528 {
5546 else
5547 {
5552 }
5558 else
5575 }
5578 }
5580 static bfd_boolean
5584 {
5589 /* Account for relaxation of .eh_frame section. */
5592 {
5596 }
5599 {
5606 /* Clear GOT and PLT assignments. */
5608 _frvfdpic_reset_got_plt_entries,
5609 NULL);
5613 }
5616 }
5618 /* Look for opportunities to relax TLS relocations. We can assume
5619 we're linking the main executable or a static-tls library, since
5620 otherwise we wouldn't have got here. */
5622 static int
5624 {
5631 }
5633 static bfd_boolean
5636 {
5643 /* If we return early, we didn't change anything. */
5646 /* We'll do our thing when requested to relax the GOT section. */
5650 /* We can only relax when linking the main executable or a library
5651 that can't be dlopened. */
5655 /* If there isn't a TLS section for this binary, we can't do
5656 anything about its TLS relocations (it probably doesn't have
5657 any. */
5664 /* Now look for opportunities to relax, adjusting the GOT usage
5665 as needed. */
5667 _frvfdpic_relax_got_plt_entries,
5670 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5673 {
5674 /* Clear GOT and PLT assignments. */
5676 _frvfdpic_reset_got_plt_entries,
5677 NULL);
5679 /* The owner of the TLS section is the output bfd. There should
5680 be a better way to get to it. */
5685 /* Repeat until we don't make any further changes. We could fail to
5686 introduce changes in a round if, for example, the 12-bit range is
5687 full, but we later release some space by getting rid of TLS
5688 descriptors in it. We have to repeat the whole process because
5689 we might have changed the size of a section processed before this
5690 one. */
5692 }
5695 }
5697 /* Fill in code and data in dynamic sections. */
5699 static bfd_boolean
5702 {
5703 /* Nothing to be done for non-FDPIC. */
5705 }
5707 static bfd_boolean
5710 {
5717 {
5719 }
5721 {
5727 {
5739 {
5740 error:
5744 }
5752 {
5753 bfd_vma value =
5762 }
5763 }
5764 }
5766 {
5770 }
5774 {
5786 {
5787 Elf_Internal_Dyn dyn;
5792 {
5814 }
5815 }
5816 }
5819 }
5821 /* Adjust a symbol defined by a dynamic object and referenced by a
5822 regular object. */
5824 static bfd_boolean
5825 elf32_frvfdpic_adjust_dynamic_symbol
5828 {
5833 /* Make sure we know what is going on here. */
5840 /* If this is a weak symbol, and there is a real definition, the
5841 processor independent code will have arranged for us to see the
5842 real definition first, and we can just use the same value. */
5844 {
5849 }
5852 }
5854 /* Perform any actions needed for dynamic symbols. */
5856 static bfd_boolean
5857 elf32_frvfdpic_finish_dynamic_symbol
5862 {
5864 }
5866 /* Decide whether to attempt to turn absptr or lsda encodings in
5867 shared libraries into pcrel within the given input section. */
5869 static bfd_boolean
5870 frvfdpic_elf_use_relative_eh_frame
5874 {
5875 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
5877 }
5879 /* Adjust the contents of an eh_frame_hdr section before they're output. */
5881 static bfd_byte
5887 {
5899 == (_frvfdpic_osec_to_segment
5908 }
5910 /* Look through the relocs for a section during the first phase.
5912 Besides handling virtual table relocs for gc, we have to deal with
5913 all sorts of PIC-related relocations. We describe below the
5914 general plan on how to handle such relocations, even though we only
5915 collect information at this point, storing them in hash tables for
5916 perusal of later passes.
5918 32 relocations are propagated to the linker output when creating
5919 position-independent output. LO16 and HI16 relocations are not
5920 supposed to be encountered in this case.
5922 LABEL16 should always be resolvable by the linker, since it's only
5923 used by branches.
5925 LABEL24, on the other hand, is used by calls. If it turns out that
5926 the target of a call is a dynamic symbol, a PLT entry must be
5927 created for it, which triggers the creation of a private function
5928 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
5930 GPREL relocations require the referenced symbol to be in the same
5931 segment as _gp, but this can only be checked later.
5933 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
5934 exist. LABEL24 might as well, since it may require a PLT entry,
5935 that will require a got.
5937 Non-FUNCDESC GOT relocations require a GOT entry to be created
5938 regardless of whether the symbol is dynamic. However, since a
5939 global symbol that turns out to not be exported may have the same
5940 address of a non-dynamic symbol, we don't assign GOT entries at
5941 this point, such that we can share them in this case. A relocation
5942 for the GOT entry always has to be created, be it to offset a
5943 private symbol by the section load address, be it to get the symbol
5944 resolved dynamically.
5946 FUNCDESC GOT relocations require a GOT entry to be created, and
5947 handled as if a FUNCDESC relocation was applied to the GOT entry in
5948 an object file.
5950 FUNCDESC relocations referencing a symbol that turns out to NOT be
5951 dynamic cause a private function descriptor to be created. The
5952 FUNCDESC relocation then decays to a 32 relocation that points at
5953 the private descriptor. If the symbol is dynamic, the FUNCDESC
5954 relocation is propagated to the linker output, such that the
5955 dynamic linker creates the canonical descriptor, pointing to the
5956 dynamically-resolved definition of the function.
5958 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
5959 symbols that are assigned to the same segment as the GOT, but we
5960 can only check this later, after we know the complete set of
5961 symbols defined and/or exported.
5963 FUNCDESC GOTOFF relocations require a function descriptor to be
5964 created and, unless lazy binding is disabled or the symbol is not
5965 dynamic, a lazy PLT entry. Since we can't tell at this point
5966 whether a symbol is going to be dynamic, we have to decide later
5967 whether to create a lazy PLT entry or bind the descriptor directly
5968 to the private function.
5970 FUNCDESC_VALUE relocations are not supposed to be present in object
5971 files, but they may very well be simply propagated to the linker
5972 output, since they have no side effect.
5975 A function descriptor always requires a FUNCDESC_VALUE relocation.
5976 Whether it's in .plt.rel or not depends on whether lazy binding is
5977 enabled and on whether the referenced symbol is dynamic.
5979 The existence of a lazy PLT requires the resolverStub lazy PLT
5980 entry to be present.
5983 As for assignment of GOT, PLT and lazy PLT entries, and private
5984 descriptors, we might do them all sequentially, but we can do
5985 better than that. For example, we can place GOT entries and
5986 private function descriptors referenced using 12-bit operands
5987 closer to the PIC register value, such that these relocations don't
5988 overflow. Those that are only referenced with LO16 relocations
5989 could come next, but we may as well place PLT-required function
5990 descriptors in the 12-bit range to make them shorter. Symbols
5991 referenced with LO16/HI16 may come next, but we may place
5992 additional function descriptors in the 16-bit range if we can
5993 reliably tell that we've already placed entries that are ever
5994 referenced with only LO16. PLT entries are therefore generated as
5995 small as possible, while not introducing relocation overflows in
5996 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
5997 generated before or after PLT entries, but not intermingled with
5998 them, such that we can have more lazy PLT entries in range for a
5999 branch to the resolverStub. The resolverStub should be emitted at
6000 the most distant location from the first lazy PLT entry such that
6001 it's still in range for a branch, or closer, if there isn't a need
6002 for so many lazy PLT entries. Additional lazy PLT entries may be
6003 emitted after the resolverStub, as long as branches are still in
6004 range. If the branch goes out of range, longer lazy PLT entries
6005 are emitted.
6007 We could further optimize PLT and lazy PLT entries by giving them
6008 priority in assignment to closer-to-gr17 locations depending on the
6009 number of occurrences of references to them (assuming a function
6010 that's called more often is more important for performance, so its
6011 PLT entry should be faster), or taking hints from the compiler.
6012 Given infinite time and money... :-) */
6014 static bfd_boolean
6019 {
6036 {
6043 else
6044 {
6050 /* PR15323, ref flags aren't set for references in the same
6051 object. */
6053 }
6056 {
6086 /* Fall through. */
6094 {
6098 }
6100 {
6103 }
6105 {
6108 {
6115 }
6116 picrel
6120 }
6121 else
6132 }
6135 {
6145 /* Fall through. */
6233 /* This relocation describes the C++ object vtable hierarchy.
6234 Reconstruct it for later use during GC. */
6240 /* This relocation describes which C++ vtable entries are actually
6241 used. Record for later use during GC. */
6263 bad_reloc:
6268 }
6269 }
6272 }
6274 \f
6275 /* Return the machine subcode from the ELF e_flags header. */
6277 static int
6279 {
6281 {
6291 }
6294 }
6296 /* Set the right machine number for a FRV ELF file. */
6298 static bfd_boolean
6300 {
6304 }
6305 \f
6306 /* Function to set the ELF flag bits. */
6308 static bfd_boolean
6310 {
6314 }
6316 /* Copy backend specific data from one object module to another. */
6318 static bfd_boolean
6320 {
6331 /* Copy object attributes. */
6335 }
6337 /* Return true if the architecture described by elf header flag
6338 EXTENSION is an extension of the architecture described by BASE. */
6340 static bfd_boolean
6342 {
6346 /* CPU_GENERIC code can be merged with code for a specific
6347 architecture, in which case the result is marked as being
6348 for the specific architecture. Everything is therefore
6349 an extension of CPU_GENERIC. */
6362 }
6364 static bfd_boolean
6366 {
6379 }
6381 /* Merge backend specific data from an object file to the output
6382 object file when linking. */
6384 static bfd_boolean
6386 {
6400 #ifdef DEBUG
6404 #endif
6407 {
6410 }
6413 ;
6416 {
6417 /* Warn if different # of gprs are used. Note, 0 means nothing is
6418 said about the size of gprs. */
6422 ;
6425 ;
6430 else
6431 {
6433 {
6437 }
6440 {
6444 }
6445 }
6447 /* Warn if different # of fprs are used. Note, 0 means nothing is
6448 said about the size of fprs. */
6452 ;
6455 ;
6460 else
6461 {
6463 {
6468 }
6471 {
6476 }
6477 }
6479 /* Warn if different dword support was used. Note, 0 means nothing is
6480 said about the dword support. */
6484 ;
6487 ;
6492 else
6493 {
6495 {
6499 }
6502 {
6506 }
6507 }
6509 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6510 feature is used. */
6512 | EF_FRV_MEDIA
6513 | EF_FRV_MULADD
6516 /* If any module was compiled without -G0, clear the G0 bit. */
6520 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6524 /* We don't have to do anything if the pic flags are the same, or the new
6525 module(s) were compiled with -mlibrary-pic. */
6529 ;
6531 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6532 flags if any from the new module. */
6536 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6540 /* One module was compiled for pic and the other was not, see if we have
6541 had any relocations that are not pic-safe. */
6542 else
6543 {
6546 else
6547 {
6549 #ifndef FRV_NO_PIC_ERROR
6555 #endif
6556 }
6557 }
6559 /* Warn if different cpu is used (allow a specific cpu to override
6560 the generic cpu). */
6564 ;
6569 else
6570 {
6572 {
6583 }
6586 {
6597 }
6598 }
6600 /* Print out any mismatches from above. */
6602 {
6607 }
6609 /* Warn about any other mismatches */
6613 {
6619 }
6620 }
6622 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6626 /* Update the old flags now with changes made above. */
6634 {
6640 else
6644 }
6650 }
6652 \f
6653 static bfd_boolean
6655 {
6657 flagword flags;
6661 /* Print normal ELF private data. */
6668 {
6678 }
6681 {
6685 }
6688 {
6693 }
6696 {
6700 }
6731 }
6733 \f
6734 /* Support for core dump NOTE sections. */
6736 static bfd_boolean
6738 {
6743 {
6747 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6748 hardcoded offsets and sizes listed below (and contained within
6749 this lexical block) refer to fields in the target's elf_prstatus
6750 struct. */
6752 /* `pr_cursig' is at offset 12. */
6755 /* `pr_pid' is at offset 24. */
6758 /* `pr_reg' is at offset 72. */
6761 /* Most grok_prstatus implementations set `raw_size' to the size
6762 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6763 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6764 and `pr_interp_fdpic_loadmap', both of which (by design)
6765 immediately follow `pr_reg'. This will allow these fields to
6766 be viewed by GDB as registers.
6768 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6769 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6773 }
6775 /* Make a ".reg/999" section. */
6778 }
6780 static bfd_boolean
6782 {
6784 {
6788 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6791 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6795 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6798 }
6800 /* Note that for some reason, a spurious space is tacked
6801 onto the end of the args in some (at least one anyway)
6802 implementations, so strip it off if it exists. */
6804 {
6810 }
6813 }
6814 #define ELF_ARCH bfd_arch_frv
6815 #define ELF_TARGET_ID FRV_ELF_DATA
6816 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6817 #define ELF_MAXPAGESIZE 0x1000
6819 #define TARGET_BIG_SYM bfd_elf32_frv_vec
6822 #define elf_info_to_howto frv_info_to_howto_rela
6823 #define elf_backend_relocate_section elf32_frv_relocate_section
6824 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6825 #define elf_backend_check_relocs elf32_frv_check_relocs
6826 #define elf_backend_object_p elf32_frv_object_p
6827 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
6829 #define elf_backend_stack_align 8
6830 #define elf_backend_can_gc_sections 1
6831 #define elf_backend_rela_normal 1
6833 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
6834 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
6835 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
6836 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
6837 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
6838 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
6840 #define elf_backend_want_got_sym 1
6841 #define elf_backend_got_header_size 0
6842 #define elf_backend_want_got_plt 0
6843 #define elf_backend_plt_readonly 1
6844 #define elf_backend_want_plt_sym 0
6845 #define elf_backend_plt_header_size 0
6847 #define elf_backend_finish_dynamic_sections \
6848 elf32_frv_finish_dynamic_sections
6850 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
6851 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
6855 #undef ELF_MAXPAGESIZE
6856 #define ELF_MAXPAGESIZE 0x4000
6858 #undef TARGET_BIG_SYM
6859 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
6860 #undef TARGET_BIG_NAME
6862 #undef elf32_bed
6863 #define elf32_bed elf32_frvfdpic_bed
6865 #undef elf_info_to_howto_rel
6866 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
6868 #undef bfd_elf32_bfd_link_hash_table_create
6869 #define bfd_elf32_bfd_link_hash_table_create \
6870 frvfdpic_elf_link_hash_table_create
6871 #undef elf_backend_always_size_sections
6872 #define elf_backend_always_size_sections \
6873 elf32_frvfdpic_always_size_sections
6874 #undef bfd_elf32_bfd_copy_private_bfd_data
6875 #define bfd_elf32_bfd_copy_private_bfd_data \
6876 elf32_frvfdpic_copy_private_bfd_data
6878 #undef elf_backend_create_dynamic_sections
6879 #define elf_backend_create_dynamic_sections \
6880 elf32_frvfdpic_create_dynamic_sections
6881 #undef elf_backend_adjust_dynamic_symbol
6882 #define elf_backend_adjust_dynamic_symbol \
6883 elf32_frvfdpic_adjust_dynamic_symbol
6884 #undef elf_backend_size_dynamic_sections
6885 #define elf_backend_size_dynamic_sections \
6886 elf32_frvfdpic_size_dynamic_sections
6887 #undef bfd_elf32_bfd_relax_section
6888 #define bfd_elf32_bfd_relax_section \
6889 elf32_frvfdpic_relax_section
6890 #undef elf_backend_finish_dynamic_symbol
6891 #define elf_backend_finish_dynamic_symbol \
6892 elf32_frvfdpic_finish_dynamic_symbol
6893 #undef elf_backend_finish_dynamic_sections
6894 #define elf_backend_finish_dynamic_sections \
6895 elf32_frvfdpic_finish_dynamic_sections
6897 #undef elf_backend_discard_info
6898 #define elf_backend_discard_info \
6899 frvfdpic_elf_discard_info
6900 #undef elf_backend_can_make_relative_eh_frame
6901 #define elf_backend_can_make_relative_eh_frame \
6902 frvfdpic_elf_use_relative_eh_frame
6903 #undef elf_backend_can_make_lsda_relative_eh_frame
6904 #define elf_backend_can_make_lsda_relative_eh_frame \
6905 frvfdpic_elf_use_relative_eh_frame
6906 #undef elf_backend_encode_eh_address
6907 #define elf_backend_encode_eh_address \
6908 frvfdpic_elf_encode_eh_address
6910 #undef elf_backend_may_use_rel_p
6911 #define elf_backend_may_use_rel_p 1
6912 #undef elf_backend_may_use_rela_p
6913 #define elf_backend_may_use_rela_p 1
6914 /* We use REL for dynamic relocations only. */
6915 #undef elf_backend_default_use_rela_p
6916 #define elf_backend_default_use_rela_p 1
6918 #undef elf_backend_omit_section_dynsym
6919 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym