| blob | 9a92c2954aa2548a80a5b1f224f2e14b76019409 |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright 2002, 2003, 2004, 2005 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 /* Forward declarations. */
29 static bfd_reloc_status_type elf32_frv_relocate_lo16
31 static bfd_reloc_status_type elf32_frv_relocate_hi16
33 static bfd_reloc_status_type elf32_frv_relocate_label24
35 static bfd_reloc_status_type elf32_frv_relocate_gprel12
38 static bfd_reloc_status_type elf32_frv_relocate_gprelu12
41 static bfd_reloc_status_type elf32_frv_relocate_gprello
44 static bfd_reloc_status_type elf32_frv_relocate_gprelhi
49 static void frv_info_to_howto_rela
51 static bfd_boolean elf32_frv_relocate_section
54 static bfd_boolean elf32_frv_add_symbol_hook
57 static bfd_reloc_status_type frv_final_link_relocate
60 static bfd_boolean elf32_frv_gc_sweep_hook
62 Elf_Internal_Rela *));
66 static bfd_boolean elf32_frv_check_relocs
69 static int elf32_frv_machine
71 static bfd_boolean elf32_frv_object_p
73 static bfd_boolean frv_elf_set_private_flags
75 static bfd_boolean frv_elf_copy_private_bfd_data
77 static bfd_boolean frv_elf_merge_private_bfd_data
79 static bfd_boolean frv_elf_print_private_bfd_data
83 {
84 /* This reloc does nothing. */
99 /* A 32 bit absolute relocation. */
114 /* A 16 bit pc-relative relocation. */
129 /* A 24-bit pc-relative relocation. */
242 /* A 12-bit signed operand with the GOT offset for the address of
243 the symbol. */
258 /* The upper 16 bits of the GOT offset for the address of the
259 symbol. */
274 /* The lower 16 bits of the GOT offset for the address of the
275 symbol. */
290 /* The 32-bit address of the canonical descriptor of a function. */
305 /* A 12-bit signed operand with the GOT offset for the address of
306 canonical descriptor of a function. */
321 /* The upper 16 bits of the GOT offset for the address of the
322 canonical descriptor of a function. */
337 /* The lower 16 bits of the GOT offset for the address of the
338 canonical descriptor of a function. */
353 /* The 64-bit descriptor of a function. */
368 /* A 12-bit signed operand with the GOT offset for the address of
369 canonical descriptor of a function. */
384 /* The upper 16 bits of the GOT offset for the address of the
385 canonical descriptor of a function. */
400 /* The lower 16 bits of the GOT offset for the address of the
401 canonical descriptor of a function. */
416 /* A 12-bit signed operand with the GOT offset for the address of
417 the symbol. */
432 /* The upper 16 bits of the GOT offset for the address of the
433 symbol. */
448 /* The lower 16 bits of the GOT offset for the address of the
449 symbol. */
464 /* A 24-bit pc-relative relocation referencing the TLS PLT entry for
465 a thread-local symbol. If the symbol number is 0, it refers to
466 the module. */
481 /* A 64-bit TLS descriptor for a symbol. This relocation is only
482 valid as a REL, dynamic relocation. */
497 /* A 12-bit signed operand with the GOT offset for the TLS
498 descriptor of the symbol. */
513 /* The upper 16 bits of the GOT offset for the TLS descriptor of the
514 symbol. */
529 /* The lower 16 bits of the GOT offset for the TLS descriptor of the
530 symbol. */
545 /* A 12-bit signed operand with the offset from the module base
546 address to the thread-local symbol address. */
561 /* The upper 16 bits of the offset from the module base address to
562 the thread-local symbol address. */
577 /* The lower 16 bits of the offset from the module base address to
578 the thread-local symbol address. */
593 /* A 12-bit signed operand with the GOT offset for the TLSOFF entry
594 for a symbol. */
609 /* The upper 16 bits of the GOT offset for the TLSOFF entry for a
610 symbol. */
625 /* The lower 16 bits of the GOT offset for the TLSOFF entry for a
626 symbol. */
641 /* The 32-bit offset from the thread pointer (not the module base
642 address) to a thread-local symbol. */
657 /* An annotation for linker relaxation, that denotes the
658 symbol+addend whose TLS descriptor is referenced by the sum of
659 the two input registers of an ldd instruction. */
674 /* An annotation for linker relaxation, that denotes the
675 symbol+addend whose TLS resolver entry point is given by the sum
676 of the two register operands of an calll instruction. */
691 /* An annotation for linker relaxation, that denotes the
692 symbol+addend whose TLS offset GOT entry is given by the sum of
693 the two input registers of an ld instruction. */
708 /* A 32-bit offset from the module base address to
709 the thread-local symbol address. */
723 };
725 /* GNU extension to record C++ vtable hierarchy. */
741 /* GNU extension to record C++ vtable member usage. */
757 /* The following 3 relocations are REL. The only difference to the
758 entries in the table above are that partial_inplace is TRUE. */
805 /* A 64-bit TLS descriptor for a symbol. The first word resolves to
806 an entry point, and the second resolves to a special argument.
807 If the symbol turns out to be in static TLS, the entry point is a
808 return instruction, and the special argument is the TLS offset
809 for the symbol. If it's in dynamic TLS, the entry point is a TLS
810 offset resolver, and the special argument is a pointer to a data
811 structure allocated by the dynamic loader, containing the GOT
812 address for the offset resolver, the module id, the offset within
813 the module, and anything else the TLS offset resolver might need
814 to determine the TLS offset for the symbol in the running
815 thread. */
831 /* The 32-bit offset from the thread pointer (not the module base
832 address) to a thread-local symbol. */
848 \f
850 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_frvfdpic_vec)
852 /* An extension of the elf hash table data structure, containing some
853 additional FRV-specific data. */
854 struct frvfdpic_elf_link_hash_table
855 {
858 /* A pointer to the .got section. */
860 /* A pointer to the .rel.got section. */
862 /* A pointer to the .rofixup section. */
864 /* A pointer to the .plt section. */
866 /* A pointer to the .rel.plt section. */
868 /* GOT base offset. */
869 bfd_vma got0;
870 /* Location of the first non-lazy PLT entry, i.e., the number of
871 bytes taken by lazy PLT entries. If locally-bound TLS
872 descriptors require a ret instruction, it will be placed at this
873 offset. */
874 bfd_vma plt0;
875 /* A hash table holding information about which symbols were
876 referenced with which PIC-related relocations. */
878 /* Summary reloc information collected by
879 _frvfdpic_count_got_plt_entries. */
881 };
883 /* Get the FRV ELF linker hash table from a link_info structure. */
885 #define frvfdpic_hash_table(info) \
886 ((struct frvfdpic_elf_link_hash_table *) ((info)->hash))
888 #define frvfdpic_got_section(info) \
889 (frvfdpic_hash_table (info)->sgot)
890 #define frvfdpic_gotrel_section(info) \
891 (frvfdpic_hash_table (info)->sgotrel)
892 #define frvfdpic_gotfixup_section(info) \
893 (frvfdpic_hash_table (info)->sgotfixup)
894 #define frvfdpic_plt_section(info) \
895 (frvfdpic_hash_table (info)->splt)
896 #define frvfdpic_pltrel_section(info) \
897 (frvfdpic_hash_table (info)->spltrel)
898 #define frvfdpic_relocs_info(info) \
899 (frvfdpic_hash_table (info)->relocs_info)
900 #define frvfdpic_got_initial_offset(info) \
901 (frvfdpic_hash_table (info)->got0)
902 #define frvfdpic_plt_initial_offset(info) \
903 (frvfdpic_hash_table (info)->plt0)
904 #define frvfdpic_dynamic_got_plt_info(info) \
905 (frvfdpic_hash_table (info)->g)
907 /* Currently it's the same, but if some day we have a reason to change
908 it, we'd better be using a different macro.
910 FIXME: if there's any TLS PLT entry that uses local-exec or
911 initial-exec models, we could use the ret at the end of any of them
912 instead of adding one more. */
913 #define frvfdpic_plt_tls_ret_offset(info) \
914 (frvfdpic_plt_initial_offset (info))
916 /* The name of the dynamic interpreter. This is put in the .interp
917 section. */
921 #define DEFAULT_STACK_SIZE 0x20000
923 /* This structure is used to collect the number of entries present in
924 each addressable range of the got. */
925 struct _frvfdpic_dynamic_got_info
926 {
927 /* Several bits of information about the current link. */
929 /* Total GOT size needed for GOT entries within the 12-, 16- or 32-bit
930 ranges. */
932 /* Total GOT size needed for function descriptor entries within the 12-,
933 16- or 32-bit ranges. */
935 /* Total GOT size needed by function descriptor entries referenced
936 in PLT entries, that would be profitable to place in offsets
937 close to the PIC register. */
938 bfd_vma fdplt;
939 /* Total PLT size needed by lazy PLT entries. */
940 bfd_vma lzplt;
941 /* Total GOT size needed for TLS descriptor entries within the 12-,
942 16- or 32-bit ranges. */
944 /* Total GOT size needed by TLS descriptors referenced in PLT
945 entries, that would be profitable to place in offers close to the
946 PIC register. */
947 bfd_vma tlsdplt;
948 /* Total PLT size needed by TLS lazy PLT entries. */
949 bfd_vma tlslzplt;
950 /* Number of relocations carried over from input object files. */
952 /* Number of fixups introduced by relocations in input object files. */
954 /* The number of fixups that reference the ret instruction added to
955 the PLT for locally-resolved TLS descriptors. */
957 };
959 /* This structure is used to assign offsets to got entries, function
960 descriptors, plt entries and lazy plt entries. */
962 struct _frvfdpic_dynamic_got_plt_info
963 {
964 /* Summary information collected with _frvfdpic_count_got_plt_entries. */
967 /* For each addressable range, we record a MAX (positive) and MIN
968 (negative) value. CUR is used to assign got entries, and it's
969 incremented from an initial positive value to MAX, then from MIN
970 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
971 assign function descriptors, and it's decreased from an initial
972 non-positive value to MIN, then from MAX down to CUR (unless CUR
973 wraps around first). All of MIN, MAX, CUR and FDCUR always point
974 to even words. ODD, if non-zero, indicates an odd word to be
975 used for the next got entry, otherwise CUR is used and
976 incremented by a pair of words, wrapping around when it reaches
977 MAX. FDCUR is decremented (and wrapped) before the next function
978 descriptor is chosen. FDPLT indicates the number of remaining
979 slots that can be used for function descriptors used only by PLT
980 entries.
982 TMAX, TMIN and TCUR are used to assign TLS descriptors. TCUR
983 starts as MAX, and grows up to TMAX, then wraps around to TMIN
984 and grows up to MIN. TLSDPLT indicates the number of remaining
985 slots that can be used for TLS descriptors used only by TLS PLT
986 entries. */
987 struct _frvfdpic_dynamic_got_alloc_data
988 {
993 };
995 /* Create an FRV ELF linker hash table. */
999 {
1008 _bfd_elf_link_hash_newfunc))
1009 {
1012 }
1015 }
1017 /* Decide whether a reference to a symbol can be resolved locally or
1018 not. If the symbol is protected, we want the local address, but
1019 its function descriptor must be assigned by the dynamic linker. */
1020 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
1021 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1022 || ! elf_hash_table (INFO)->dynamic_sections_created)
1023 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
1024 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1026 /* This structure collects information on what kind of GOT, PLT or
1027 function descriptors are required by relocations that reference a
1028 certain symbol. */
1029 struct frvfdpic_relocs_info
1030 {
1031 /* The index of the symbol, as stored in the relocation r_info, if
1032 we have a local symbol; -1 otherwise. */
1034 union
1035 {
1036 /* The input bfd in which the symbol is defined, if it's a local
1037 symbol. */
1039 /* If symndx == -1, the hash table entry corresponding to a global
1040 symbol (even if it turns out to bind locally, in which case it
1041 should ideally be replaced with section's symndx + addend). */
1044 /* The addend of the relocation that references the symbol. */
1045 bfd_vma addend;
1047 /* The fields above are used to identify an entry. The fields below
1048 contain information on how an entry is used and, later on, which
1049 locations it was assigned. */
1050 /* The following 3 fields record whether the symbol+addend above was
1051 ever referenced with a GOT relocation. The 12 suffix indicates a
1052 GOT12 relocation; los is used for GOTLO relocations that are not
1053 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1054 pairs. */
1058 /* Whether a FUNCDESC relocation references symbol+addend. */
1060 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1064 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1068 /* Whether a GETTLSOFF relocation references symbol+addend. */
1070 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1071 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1072 We might instead just pre-compute flags telling whether the
1073 object is suitable for local exec, initial exec or general
1074 dynamic addressing, and use that all over the place. We could
1075 also try to do a better job of merging TLSOFF and TLSDESC entries
1076 in main executables, but perhaps we can get rid of TLSDESC
1077 entirely in them instead. */
1078 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1082 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1086 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1087 GOTOFFHI relocations. The addend doesn't really matter, since we
1088 envision that this will only be used to check whether the symbol
1089 is mapped to the same segment as the got. */
1091 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1093 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1094 relocation. */
1096 /* Whether we need a PLT entry for a symbol. Should be implied by
1097 something like:
1098 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1100 /* Whether a function descriptor should be created in this link unit
1101 for symbol+addend. Should be implied by something like:
1102 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1103 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1104 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1106 /* Whether a lazy PLT entry is needed for this symbol+addend.
1107 Should be implied by something like:
1108 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1109 && ! (info->flags & DF_BIND_NOW)) */
1111 /* Whether we've already emitted GOT relocations and PLT entries as
1112 needed for this symbol. */
1115 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1116 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1117 symbol+addend. */
1120 /* The number of .rofixups entries and dynamic relocations allocated
1121 for this symbol, minus any that might have already been used. */
1124 /* The offsets of the GOT entries assigned to symbol+addend, to the
1125 function descriptor's address, and to a function descriptor,
1126 respectively. Should be zero if unassigned. The offsets are
1127 counted from the value that will be assigned to the PIC register,
1128 not from the beginning of the .got section. */
1130 /* The offsets of the PLT entries assigned to symbol+addend,
1131 non-lazy and lazy, respectively. If unassigned, should be
1132 (bfd_vma)-1. */
1134 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1136 /* The offset of the TLS offset PLT entry. */
1137 bfd_vma tlsplt_entry;
1138 };
1140 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1141 static hashval_t
1143 {
1149 }
1151 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1152 identical. */
1153 static int
1155 {
1161 }
1163 /* Find or create an entry in a hash table HT that matches the key
1164 fields of the given ENTRY. If it's not found, memory for a new
1165 entry is allocated in ABFD's obstack. */
1171 {
1194 }
1196 /* Obtain the address of the entry in HT associated with H's symbol +
1197 addend, creating a new entry if none existed. ABFD is only used
1198 for memory allocation purposes. */
1203 bfd_vma addend,
1205 {
1213 }
1215 /* Obtain the address of the entry in HT associated with the SYMNDXth
1216 local symbol of the input bfd ABFD, plus the addend, creating a new
1217 entry if none existed. */
1222 bfd_vma addend,
1224 {
1232 }
1234 /* Merge fields set by check_relocs() of two entries that end up being
1235 mapped to the same (presumably global) symbol. */
1240 {
1261 }
1263 /* Every block of 65535 lazy PLT entries shares a single call to the
1264 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1265 32767, counting from 0). All other lazy PLT entries branch to it
1266 in a single instruction. */
1268 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1269 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1271 /* Add a dynamic relocation to the SRELOC section. */
1277 {
1278 Elf_Internal_Rela outrel;
1279 bfd_vma reloc_offset;
1291 /* If the entry's index is zero, this relocation was probably to a
1292 linkonce section that got discarded. We reserved a dynamic
1293 relocation, but it was for another entry than the one we got at
1294 the time of emitting the relocation. Unfortunately there's no
1295 simple way for us to catch this situation, since the relocation
1296 is cleared right before calling relocate_section, at which point
1297 we no longer know what the relocation used to point to. */
1299 {
1302 }
1305 }
1307 /* Add a fixup to the ROFIXUP section. */
1309 static bfd_vma
1312 {
1313 bfd_vma fixup_offset;
1320 {
1323 }
1327 {
1328 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1329 above. */
1332 }
1335 }
1337 /* Find the segment number in which OSEC, and output section, is
1338 located. */
1340 static unsigned
1342 {
1346 /* Find the segment that contains the output_section. */
1351 {
1360 }
1363 }
1367 {
1371 }
1373 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1375 /* Return the base VMA address which should be subtracted from real addresses
1376 when resolving TLSMOFF relocation.
1377 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1379 static bfd_vma
1381 {
1382 /* If tls_sec is NULL, we should have signalled an error already. */
1386 }
1388 /* Generate relocations for GOT entries, function descriptors, and
1389 code for PLT and lazy PLT entries. */
1397 bfd_vma addend)
1399 {
1409 {
1410 /* If the symbol is dynamic, consider it for dynamic
1411 relocations, otherwise decay to section + offset. */
1414 else
1415 {
1420 else
1422 }
1423 }
1425 /* Generate relocation for GOT entry pointing to the symbol. */
1427 {
1431 /* If the symbol is dynamic but binds locally, use
1432 section+offset. */
1435 {
1438 else
1443 else
1445 }
1447 /* If we're linking an executable at a fixed address, we can
1448 omit the dynamic relocation as long as the symbol is local to
1449 this module. */
1453 {
1461 ->vma
1465 }
1466 else
1468 _bfd_elf_section_offset
1482 }
1484 /* Generate relocation for GOT entry pointing to a canonical
1485 function descriptor. */
1487 {
1494 {
1495 /* If the symbol is dynamic and there may be dynamic symbol
1496 resolution because we are, or are linked with, a shared
1497 library, emit a FUNCDESC relocation such that the dynamic
1498 linker will allocate the function descriptor. If the
1499 symbol needs a non-local function descriptor but binds
1500 locally (e.g., its visibility is protected, emit a
1501 dynamic relocation decayed to section+offset. */
1506 {
1512 }
1515 {
1520 {
1527 }
1528 }
1529 else
1530 {
1531 /* Otherwise, we know we have a private function descriptor,
1532 so reference it directly. */
1540 }
1542 /* If there is room for dynamic symbol resolution, emit the
1543 dynamic relocation. However, if we're linking an
1544 executable at a fixed location, we won't have emitted a
1545 dynamic symbol entry for the got section, so idx will be
1546 zero, which means we can and should compute the address
1547 of the private descriptor ourselves. */
1551 {
1558 ->output_offset
1561 }
1562 else
1565 _bfd_elf_section_offset
1575 }
1581 }
1583 /* Generate relocation to fill in a private function descriptor in
1584 the GOT. */
1586 {
1589 bfd_vma ofst;
1592 /* If the symbol is dynamic but binds locally, use
1593 section+offset. */
1596 {
1599 else
1604 else
1606 }
1608 /* If we're linking an executable at a fixed address, we can
1609 omit the dynamic relocation as long as the symbol is local to
1610 this module. */
1613 {
1619 {
1625 ->output_offset
1633 ->output_offset
1636 }
1637 }
1638 else
1639 {
1640 ofst =
1642 entry->lazyplt
1645 _bfd_elf_section_offset
1655 }
1657 /* If we've omitted the dynamic relocation, just emit the fixed
1658 addresses of the symbol and of the local GOT base offset. */
1660 {
1665 }
1667 {
1669 {
1676 }
1680 /* A function descriptor used for lazy or local resolving is
1681 initialized such that its high word contains the output
1682 section index in which the PLT entries are located, and
1683 the low word contains the address of the lazy PLT entry
1684 entry point, that must be within the memory region
1685 assigned to that section. */
1689 highword = _frvfdpic_osec_to_segment
1691 }
1692 else
1693 {
1694 /* A function descriptor for a local function gets the index
1695 of the section. For a non-local function, it's
1696 disregarded. */
1701 else
1702 highword = _frvfdpic_osec_to_segment
1704 }
1714 }
1716 /* Generate code for the PLT entry. */
1718 {
1724 /* Figure out what kind of PLT entry we need, depending on the
1725 location of the function descriptor within the GOT. */
1728 {
1729 /* lddi @(gr15, fd_entry), gr14 */
1732 plt_code);
1734 }
1735 else
1736 {
1739 {
1740 /* setlos lo(fd_entry), gr14 */
1742 0x9cfc0000
1744 plt_code);
1746 }
1747 else
1748 {
1749 /* sethi.p hi(fd_entry), gr14
1750 setlo lo(fd_entry), gr14 */
1752 0x1cf80000
1755 plt_code);
1758 0x9cf40000
1760 plt_code);
1762 }
1763 /* ldd @(gr14,gr15),gr14 */
1766 }
1767 /* jmpl @(gr14,gr0) */
1769 }
1771 /* Generate code for the lazy PLT entry. */
1773 {
1776 bfd_vma resolverStub_addr;
1787 {
1788 /* This is a lazy PLT entry that includes a resolver call. */
1789 /* ldd @(gr15,gr0), gr4
1790 jmpl @(gr4,gr0) */
1793 }
1794 else
1795 {
1796 /* bra resolverStub */
1798 0xc01a0000
1801 lzplt_code);
1802 }
1803 }
1805 /* Generate relocation for GOT entry holding the TLS offset. */
1807 {
1813 {
1814 /* If the symbol is dynamic but binds locally, use
1815 section+offset. */
1817 {
1820 else
1826 else
1828 }
1829 }
1831 /* *ABS*+addend is special for TLS relocations, use only the
1832 addend. */
1837 ;
1838 /* If we're linking an executable, we can entirely omit the
1839 dynamic relocation if the symbol is local to this module. */
1843 {
1846 }
1847 else
1848 {
1852 {
1854 {
1859 }
1862 }
1864 _bfd_elf_section_offset
1874 }
1880 }
1883 {
1887 /* If the symbol is dynamic but binds locally, use
1888 section+offset. */
1891 {
1894 else
1899 else
1901 }
1903 /* If we didn't set up a TLS offset entry, but we're linking an
1904 executable and the symbol binds locally, we can use the
1905 module offset in the TLS descriptor in relaxations. */
1915 {
1916 /* *ABS*+addend is special for TLS relocations, use only the
1917 addend for the TLS offset, and take the module id as
1918 0. */
1922 ;
1923 /* For other TLS symbols that bind locally, add the section
1924 TLS offset to the addend. */
1941 ->output_offset
1947 /* We've used one of the reserved fixups, so discount it so
1948 that we can check at the end that we've used them
1949 all. */
1952 /* While at that, make sure the ret instruction makes to the
1953 right location in the PLT. We could do it only when we
1954 got to 0, but since the check at the end will only print
1955 a warning, make sure we have the ret in place in case the
1956 warning is missed. */
1960 }
1961 else
1962 {
1966 {
1968 {
1973 }
1976 }
1979 _bfd_elf_section_offset
1994 }
2000 }
2002 /* Generate code for the get-TLS-offset PLT entry. */
2004 {
2011 {
2015 /* sec may be NULL when referencing an undefweak symbol
2016 while linking a static executable. */
2018 {
2021 }
2022 else
2023 {
2026 else
2032 else
2034 }
2036 /* *ABS*+addend is special for TLS relocations, use only the
2037 addend for the TLS offset, and take the module id as
2038 0. */
2042 ;
2043 /* For other TLS symbols that bind locally, add the section
2044 TLS offset to the addend. */
2050 {
2051 /* setlos lo(ad), gr9 */
2053 0x92fc0000
2054 | (ad
2056 plt_code);
2058 }
2059 else
2060 {
2061 /* sethi.p hi(ad), gr9
2062 setlo lo(ad), gr9 */
2064 0x12f80000
2067 plt_code);
2070 0x92f40000
2071 | (ad
2073 plt_code);
2075 }
2076 /* ret */
2078 }
2080 {
2081 /* Figure out what kind of PLT entry we need, depending on the
2082 location of the TLS descriptor within the GOT. */
2085 {
2086 /* ldi @(gr15, tlsoff_entry), gr9 */
2090 plt_code);
2092 }
2093 else
2094 {
2097 {
2098 /* setlos lo(tlsoff_entry), gr8 */
2100 0x90fc0000
2103 plt_code);
2105 }
2106 else
2107 {
2108 /* sethi.p hi(tlsoff_entry), gr8
2109 setlo lo(tlsoff_entry), gr8 */
2111 0x10f80000
2114 plt_code);
2117 0x90f40000
2120 plt_code);
2122 }
2123 /* ld @(gr15,gr8),gr9 */
2126 }
2127 /* ret */
2129 }
2130 else
2131 {
2134 /* Figure out what kind of PLT entry we need, depending on the
2135 location of the TLS descriptor within the GOT. */
2138 {
2139 /* lddi @(gr15, tlsdesc_entry), gr8 */
2143 plt_code);
2145 }
2146 else
2147 {
2150 {
2151 /* setlos lo(tlsdesc_entry), gr8 */
2153 0x90fc0000
2156 plt_code);
2158 }
2159 else
2160 {
2161 /* sethi.p hi(tlsdesc_entry), gr8
2162 setlo lo(tlsdesc_entry), gr8 */
2164 0x10f80000
2167 plt_code);
2170 0x90f40000
2173 plt_code);
2175 }
2176 /* ldd @(gr15,gr8),gr8 */
2179 }
2180 /* jmpl @(gr8,gr0) */
2182 }
2183 }
2186 }
2188 /* Handle an FRV small data reloc. */
2190 static bfd_reloc_status_type
2198 bfd_vma value;
2199 {
2200 bfd_vma insn;
2201 bfd_vma gp;
2225 }
2227 /* Handle an FRV small data reloc. for the u12 field. */
2229 static bfd_reloc_status_type
2237 bfd_vma value;
2238 {
2239 bfd_vma insn;
2240 bfd_vma gp;
2242 bfd_vma mask;
2260 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2267 }
2269 /* Handle an FRV ELF HI16 reloc. */
2271 static bfd_reloc_status_type
2276 bfd_vma value;
2277 {
2278 bfd_vma insn;
2293 }
2294 static bfd_reloc_status_type
2299 bfd_vma value;
2300 {
2301 bfd_vma insn;
2315 }
2317 /* Perform the relocation for the CALL label24 instruction. */
2319 static bfd_reloc_status_type
2325 bfd_vma value;
2326 {
2327 bfd_vma insn;
2328 bfd_vma label6;
2329 bfd_vma label18;
2331 /* The format for the call instruction is:
2333 0 000000 0001111 000000000000000000
2334 label6 opcode label18
2336 The branch calculation is: pc + (4*label24)
2337 where label24 is the concatenation of label6 and label18. */
2339 /* Grab the instruction. */
2360 }
2362 static bfd_reloc_status_type
2370 bfd_vma value;
2371 {
2372 bfd_vma insn;
2373 bfd_vma gp;
2395 }
2397 static bfd_reloc_status_type
2405 bfd_vma value;
2406 {
2407 bfd_vma insn;
2408 bfd_vma gp;
2431 }
2436 bfd_reloc_code_real_type code;
2437 {
2439 {
2450 /* Fall through. */
2588 }
2591 }
2593 /* Set the howto pointer for an FRV ELF reloc. */
2595 static void
2600 {
2605 {
2617 }
2618 }
2620 /* Set the howto pointer for an FRV ELF REL reloc. */
2621 static void
2624 {
2629 {
2653 }
2654 }
2655 \f
2656 /* Perform a single relocation. By default we use the standard BFD
2657 routines, but a few relocs, we have to do them ourselves. */
2659 static bfd_reloc_status_type
2661 relocation)
2667 bfd_vma relocation;
2668 {
2672 }
2674 \f
2675 /* Relocate an FRV ELF section.
2677 The RELOCATE_SECTION function is called by the new ELF backend linker
2678 to handle the relocations for a section.
2680 The relocs are always passed as Rela structures; if the section
2681 actually uses Rel structures, the r_addend field will always be
2682 zero.
2684 This function is responsible for adjusting the section contents as
2685 necessary, and (if using Rela relocs and generating a relocatable
2686 output file) adjusting the reloc addend as necessary.
2688 This function does not have to worry about setting the reloc
2689 address or the reloc symbol index.
2691 LOCAL_SYMS is a pointer to the swapped in local symbols.
2693 LOCAL_SECTIONS is an array giving the section in the input file
2694 corresponding to the st_shndx field of each local symbol.
2696 The global hash table entry for the global symbols can be found
2697 via elf_sym_hashes (input_bfd).
2699 When generating relocatable output, this function must handle
2700 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2701 going to be the section symbol corresponding to the output
2702 section, which means that the addend must be adjusted
2703 accordingly. */
2705 static bfd_boolean
2716 {
2739 else
2745 else
2751 else
2756 else
2760 {
2766 bfd_vma relocation;
2767 bfd_reloc_status_type r;
2780 /* This is a final link. */
2788 {
2793 name = bfd_elf_string_from_elf_section
2796 }
2797 else
2798 {
2809 {
2811 r_type != R_FRV_TLSMOFF
2813 {
2816 }
2817 else
2818 {
2823 }
2824 }
2826 {
2828 }
2832 else
2833 {
2841 }
2843 }
2846 {
2886 else
2887 /* In order to find the entry we created before, we must
2888 use the original addend, not the one that may have been
2889 modified by _bfd_elf_rela_local_sym(). */
2899 {
2904 }
2909 non_fdpic:
2912 {
2917 }
2919 }
2922 {
2945 }
2947 /* Try to apply TLS relaxations. */
2950 {
2952 #define LOCAL_EXEC_P(info, picrel) \
2953 ((info)->executable \
2954 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2955 #define INITIAL_EXEC_P(info, picrel) \
2956 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2957 && (picrel)->tlsoff_entry)
2959 #define IN_RANGE_FOR_OFST12_P(value) \
2960 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2961 #define IN_RANGE_FOR_SETLOS_P(value) \
2962 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2963 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2964 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2966 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2967 (LOCAL_EXEC_P ((info), (picrel)) \
2968 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2969 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2970 (INITIAL_EXEC_P ((info), (picrel)) \
2971 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2973 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2974 (LOCAL_EXEC_P ((info), (picrel)))
2975 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2976 (INITIAL_EXEC_P ((info), (picrel)))
2978 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2979 (LOCAL_EXEC_P ((info), (picrel)) \
2980 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2985 /* Is this a call instruction? */
2987 {
2993 }
2997 {
2998 /* Replace the call instruction (except the packing bit)
2999 with setlos #tlsmofflo(symbol+offset), gr9. */
3007 }
3010 {
3011 /* Replace the call instruction (except the packing bit)
3012 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
3020 }
3027 /* Is this an lddi instruction? */
3029 {
3035 }
3040 info))
3041 {
3042 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3043 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3044 Preserve the packing bit. */
3054 }
3058 {
3059 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3060 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3061 Preserve the packing bit. */
3071 }
3074 {
3075 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3076 with ldi @(grB, #gottlsoff12(symbol+offset),
3077 gr<C+1>. Preserve the packing bit. If gottlsoff12
3078 overflows, we'll error out, but that's sort-of ok,
3079 since we'd started with gottlsdesc12, that's actually
3080 more demanding. Compiling with -fPIE instead of
3081 -fpie would fix it; linking with --relax should fix
3082 it as well. */
3091 }
3098 /* Is this a sethi instruction? */
3100 {
3106 }
3112 {
3113 /* Replace sethi with a nop. Preserve the packing bit. */
3118 /* Nothing to relocate. */
3120 }
3123 {
3124 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3128 }
3135 /* Is this a setlo or setlos instruction? */
3137 {
3144 }
3150 {
3151 /* Replace setlo/setlos with a nop. Preserve the
3152 packing bit. */
3157 /* Nothing to relocate. */
3159 }
3162 {
3163 /* If the corresponding sethi (if it exists) decayed
3164 to a nop, make sure this becomes (or already is) a
3165 setlos, not setlo. */
3167 {
3170 }
3172 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3176 }
3183 /* Is this an ldd instruction? */
3185 {
3191 }
3196 info))
3197 {
3198 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3199 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3200 Preserve the packing bit. */
3210 }
3214 {
3215 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3216 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3217 Preserve the packing bit. */
3227 }
3231 {
3232 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3233 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3234 Preserve the packing bit. */
3244 }
3247 {
3248 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3249 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3250 Preserve the packing bit. */
3256 /* #tlsoff(symbol+offset) is just a relaxation
3257 annotation, so there's nothing left to
3258 relocate. */
3260 }
3267 /* Is this a calll or callil instruction? */
3269 {
3276 }
3281 info))
3282 {
3283 /* Replace calll with a nop. Preserve the packing bit. */
3288 /* Nothing to relocate. */
3290 }
3294 {
3295 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3296 Preserve the packing bit. */
3304 }
3307 {
3308 /* Replace calll with a nop. Preserve the packing bit. */
3313 /* Nothing to relocate. */
3315 }
3322 /* Is this an ldi instruction? */
3324 {
3330 }
3334 {
3335 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3336 with setlos #tlsmofflo(symbol+offset), grC.
3337 Preserve the packing bit. */
3345 }
3352 /* Is this a sethi instruction? */
3354 {
3360 }
3366 {
3367 /* Replace sethi with a nop. Preserve the packing bit. */
3372 /* Nothing to relocate. */
3374 }
3381 /* Is this a setlo or setlos instruction? */
3383 {
3390 }
3396 {
3397 /* Replace setlo/setlos with a nop. Preserve the
3398 packing bit. */
3403 /* Nothing to relocate. */
3405 }
3412 /* Is this an ld instruction? */
3414 {
3420 }
3424 {
3425 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3426 with setlos #tlsmofflo(symbol+offset), grC.
3427 Preserve the packing bit. */
3435 }
3439 {
3440 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3441 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3442 Preserve the packing bit. */
3450 }
3457 /* Is this a sethi instruction? */
3459 {
3465 }
3468 info))
3469 {
3470 /* Replace sethi with a nop. Preserve the packing bit. */
3475 /* Nothing to relocate. */
3477 }
3484 /* Is this a setlo or setlos instruction? */
3486 {
3493 }
3496 info))
3497 /* If the corresponding sethi (if it exists) decayed
3498 to a nop, make sure this becomes (or already is) a
3499 setlos, not setlo. */
3500 {
3503 }
3507 /*
3508 There's nothing to relax in these:
3509 R_FRV_TLSDESC_VALUE
3510 R_FRV_TLSOFF
3511 R_FRV_TLSMOFF12
3512 R_FRV_TLSMOFFHI
3513 R_FRV_TLSMOFFLO
3514 R_FRV_TLSMOFF
3515 */
3519 }
3522 {
3528 {
3533 }
3534 /* We don't want to warn on calls to undefined weak symbols,
3535 as calls to them must be protected by non-NULL tests
3536 anyway, and unprotected calls would invoke undefined
3537 behavior. */
3541 else
3581 {
3587 {
3588 /* If the symbol is dynamic and there may be dynamic
3589 symbol resolution because we are or are linked with a
3590 shared library, emit a FUNCDESC relocation such that
3591 the dynamic linker will allocate the function
3592 descriptor. If the symbol needs a non-local function
3593 descriptor but binds locally (e.g., its visibility is
3594 protected, emit a dynamic relocation decayed to
3595 section+offset. */
3599 {
3604 }
3606 {
3608 {
3613 }
3615 }
3616 else
3617 {
3618 /* Otherwise, we know we have a private function
3619 descriptor, so reference it directly. */
3627 }
3629 /* If there is room for dynamic symbol resolution, emit
3630 the dynamic relocation. However, if we're linking an
3631 executable at a fixed location, we won't have emitted a
3632 dynamic symbol entry for the got section, so idx will
3633 be zero, which means we can and should compute the
3634 address of the private descriptor ourselves. */
3637 {
3642 {
3644 input_section
3646 {
3652 }
3654 frvfdpic_gotfixup_section
3656 _bfd_elf_section_offset
3659 + input_section
3662 picrel);
3663 }
3664 }
3668 {
3670 input_section
3672 {
3678 }
3681 _bfd_elf_section_offset
3684 + input_section
3688 }
3689 else
3691 }
3693 /* We want the addend in-place because dynamic
3694 relocations are REL. Setting relocation to it should
3695 arrange for it to be installed. */
3697 }
3703 {
3706 }
3707 /* Fall through. */
3709 {
3713 /* If the symbol is dynamic but binds locally, use
3714 section+offset. */
3716 {
3718 {
3723 }
3725 }
3726 else
3727 {
3730 else
3738 else
3740 }
3742 /* If we're linking an executable at a fixed address, we
3743 can omit the dynamic relocation as long as the symbol
3744 is defined in the current link unit (which is implied
3745 by its output section not being NULL). */
3748 {
3755 {
3757 input_section
3759 {
3765 }
3767 {
3769 frvfdpic_gotfixup_section
3771 _bfd_elf_section_offset
3774 + input_section
3777 picrel);
3779 _frvfdpic_add_rofixup
3782 _bfd_elf_section_offset
3787 }
3788 }
3789 }
3790 else
3791 {
3795 {
3797 input_section
3799 {
3805 }
3808 _bfd_elf_section_offset
3811 + input_section
3815 }
3818 /* We want the addend in-place because dynamic
3819 relocations are REL. Setting relocation to it
3820 should arrange for it to be installed. */
3822 }
3825 {
3826 /* If we've omitted the dynamic relocation, just emit
3827 the fixed addresses of the symbol and of the local
3828 GOT base offset. */
3836 else
3837 /* A function descriptor used for lazy or local
3838 resolving is initialized such that its high word
3839 contains the output section index in which the
3840 PLT entries are located, and the low word
3841 contains the offset of the lazy PLT entry entry
3842 point into that section. */
3847 sec
3850 }
3851 }
3898 {
3901 }
3903 {
3907 }
3908 else
3927 /* These shouldn't be present in input object files. */
3934 /* These are just annotations for relaxation, nothing to do
3935 here. */
3944 }
3947 {
3948 /* If you take this out, remove the #error from fdpic-static-6.d
3949 in the ld testsuite. */
3950 /* This helps catch problems in GCC while we can't do more
3951 than static linking. The idea is to test whether the
3952 input file basename is crt0.o only once. */
3954 silence_segment_error =
3963 /* We don't want duplicate errors for undefined
3964 symbols. */
3967 {
3973 else
3978 }
3982 }
3985 {
3988 /* We need the addend to be applied before we shift the
3989 value right. */
3991 /* Fall through. */
3998 /* Fall through. */
4012 }
4015 {
4019 /* Fall through. */
4021 /* When referencing a GOT entry, a function descriptor or a
4022 PLT, we don't want the addend to apply to the reference,
4023 but rather to the referenced symbol. The actual entry
4024 will have already been created taking the addend into
4025 account, so cancel it out here. */
4042 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
4043 here, since we do want to apply the addend to the others.
4044 Note that we've applied the addend to GOTOFFHI before we
4045 shifted it right. */
4053 }
4085 else
4090 {
4094 {
4121 }
4124 {
4129 }
4133 }
4134 }
4137 }
4138 \f
4139 /* Return the section that should be marked against GC for a given
4140 relocation. */
4149 {
4151 {
4153 {
4160 {
4170 }
4171 }
4172 }
4173 else
4177 }
4179 /* Update the got entry reference counts for the section being removed. */
4181 static bfd_boolean
4187 {
4189 }
4191 \f
4192 /* Hook called by the linker routine which adds symbols from an object
4193 file. We use it to put .comm items in .scomm, and not .comm. */
4195 static bfd_boolean
4204 {
4208 {
4209 /* Common symbols less than or equal to -G nn bytes are
4210 automatically put into .sbss. */
4215 {
4219 | SEC_IS_COMMON
4222 }
4226 }
4229 }
4231 /* We need dynamic symbols for every section, since segments can
4232 relocate independently. */
4233 static bfd_boolean
4236 ATTRIBUTE_UNUSED,
4238 {
4240 {
4243 /* If sh_type is yet undecided, assume it could be
4244 SHT_PROGBITS/SHT_NOBITS. */
4248 /* There shouldn't be section relative relocations
4249 against any other section. */
4252 }
4253 }
4255 /* Create a .got section, as well as its additional info field. This
4256 is almost entirely copied from
4257 elflink.c:_bfd_elf_create_got_section(). */
4259 static bfd_boolean
4261 {
4270 /* This function may be called more than once. */
4275 /* Machine specific: although pointers are 32-bits wide, we want the
4276 GOT to be aligned to a 64-bit boundary, such that function
4277 descriptors in it can be accessed with 64-bit loads and
4278 stores. */
4292 {
4298 }
4301 {
4302 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4303 (or .got.plt) section. We don't do this in the linker script
4304 because we don't want to define the symbol if we are not creating
4305 a global offset table. */
4317 /* Machine-specific: we want the symbol for executables as
4318 well. */
4323 }
4325 /* The first bit of the global offset table is the header. */
4328 /* This is the machine-specific part. Create and initialize section
4329 data for the got. */
4331 {
4334 frvfdpic_relocs_info_hash,
4335 frvfdpic_relocs_info_eq,
4348 /* Machine-specific. */
4358 }
4359 else
4360 {
4363 }
4365 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4366 turns out that we're linking with a different linker script, the
4367 linker script will override it. */
4378 /* Machine-specific: we want the symbol for executables as well. */
4385 /* FDPIC supports Thread Local Storage, and this may require a
4386 procedure linkage table for TLS PLT entries. */
4388 /* This is mostly copied from
4389 elflink.c:_bfd_elf_create_dynamic_sections(). */
4403 /* FRV-specific: remember it. */
4407 {
4408 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4409 .plt section. */
4425 }
4427 /* FRV-specific: we want rel relocations for the plt. */
4433 /* FRV-specific: remember it. */
4437 }
4439 /* Make sure the got and plt sections exist, and that our pointers in
4440 the link hash table point to them. */
4442 static bfd_boolean
4444 {
4445 /* This is mostly copied from
4446 elflink.c:_bfd_elf_create_dynamic_sections(). */
4447 flagword flags;
4454 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4455 .rel[a].bss sections. */
4457 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4458 way. */
4462 /* FRV-specific: make sure we created everything we wanted. */
4469 {
4470 /* The .dynbss section is a place to put symbols which are defined
4471 by dynamic objects, are referenced by regular objects, and are
4472 not functions. We must allocate space for them in the process
4473 image and use a R_*_COPY reloc to tell the dynamic linker to
4474 initialize them at run time. The linker script puts the .dynbss
4475 section into the .bss section of the final image. */
4481 /* The .rel[a].bss section holds copy relocs. This section is not
4482 normally needed. We need to create it here, though, so that the
4483 linker will map it to an output section. We can't just create it
4484 only if we need it, because we will not know whether we need it
4485 until we have seen all the input files, and the first time the
4486 main linker code calls BFD after examining all the input files
4487 (size_dynamic_sections) the input sections have already been
4488 mapped to the output sections. If the section turns out not to
4489 be needed, we can discard it later. We will never need this
4490 section when generating a shared object, since they do not use
4491 copy relocs. */
4493 {
4501 }
4502 }
4505 }
4507 /* Compute the total GOT and PLT size required by each symbol in each
4508 range. Symbols may require up to 4 words in the GOT: an entry
4509 pointing to the symbol, an entry pointing to its function
4510 descriptor, and a private function descriptors taking two
4511 words. */
4513 static void
4516 {
4517 /* Allocate space for a GOT entry pointing to the symbol. */
4524 else
4528 /* Allocate space for a GOT entry pointing to the function
4529 descriptor. */
4536 else
4540 /* Decide whether we need a PLT entry, a function descriptor in the
4541 GOT, and a lazy PLT entry for this symbol. */
4555 /* Allocate space for a function descriptor. */
4564 else
4570 }
4572 /* Compute the total GOT size required by each TLS symbol in each
4573 range. Symbols may require up to 5 words in the GOT: an entry
4574 holding the TLS offset for the symbol, and an entry with a full TLS
4575 descriptor taking 4 words. */
4577 static void
4580 bfd_boolean subtract)
4581 {
4584 /* Allocate space for a GOT entry with the TLS offset of the
4585 symbol. */
4592 else
4596 /* If there's any TLSOFF relocation, mark the output file as not
4597 suitable for dlopening. This mark will remain even if we relax
4598 all such relocations, but this is not a problem, since we'll only
4599 do so for executables, and we definitely don't want anyone
4600 dlopening executables. */
4604 /* Allocate space for a TLS descriptor. */
4613 else
4616 }
4618 /* Compute the number of dynamic relocations and fixups that a symbol
4619 requires, and add (or subtract) from the grand and per-symbol
4620 totals. */
4622 static void
4625 bfd_boolean subtract)
4626 {
4630 {
4634 /* In the executable, TLS relocations to symbols that bind
4635 locally (including those that resolve to global TLS offsets)
4636 are resolved immediately, without any need for fixups or
4637 dynamic relocations. In shared libraries, however, we must
4638 emit dynamic relocations even for local symbols, because we
4639 don't know the module id the library is going to get at
4640 run-time, nor its TLS base offset. */
4645 }
4646 else
4647 {
4649 {
4655 }
4656 else
4657 {
4660 }
4664 {
4668 }
4669 else
4671 }
4674 {
4678 }
4685 }
4687 /* Look for opportunities to relax TLS relocations. We can assume
4688 we're linking the main executable or a static-tls library, since
4689 otherwise we wouldn't have got here. When relaxing, we have to
4690 first undo any previous accounting of TLS uses of fixups, dynamic
4691 relocations, GOT and PLT entries. */
4693 static void
4696 bfd_boolean relaxing)
4697 {
4704 {
4706 {
4710 }
4712 /* When linking an executable, we can always decay GOTTLSDESC to
4713 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4714 When linking a static-tls shared library, using TLSMOFF is
4715 not an option, but we can still use GOTTLSOFF. When decaying
4716 to GOTTLSOFF, we must keep the GOT entry in range. We know
4717 it has to fit because we'll be trading the 4 words of hte TLS
4718 descriptor for a single word in the same range. */
4722 {
4726 }
4729 }
4731 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4732 main executable. We have to check whether the symbol's TLSOFF is
4733 in range for a setlos. For symbols with a hash entry, we can
4734 determine exactly what to do; for others locals, we don't have
4735 addresses handy, so we use the size of the TLS section as an
4736 approximation. If we get it wrong, we'll retain a GOT entry
4737 holding the TLS offset (without dynamic relocations or fixups),
4738 but we'll still optimize away the loads from it. Since TLS sizes
4739 are generally very small, it's probably not worth attempting to
4740 do better than this. */
4746 /* The above may hold for an undefweak TLS symbol, so make
4747 sure we don't have this case before accessing def.value
4748 and def.section. */
4760 {
4762 {
4766 }
4770 }
4772 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4773 have a #gottlsoff12 relocation for this entry, or if we can fit
4774 one more in the 12-bit (and 16-bit) ranges. */
4777 || (relaxing
4782 {
4784 {
4788 }
4792 }
4795 {
4798 }
4801 }
4803 /* Compute the total GOT and PLT size required by each symbol in each range. *
4804 Symbols may require up to 4 words in the GOT: an entry pointing to
4805 the symbol, an entry pointing to its function descriptor, and a
4806 private function descriptors taking two words. */
4808 static int
4810 {
4818 else
4819 {
4822 }
4825 }
4827 /* Determine the positive and negative ranges to be used by each
4828 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4829 double-word boundary, are the minimum (negative) and maximum
4830 (positive) GOT offsets already used by previous ranges, except for
4831 an ODD entry that may have been left behind. GOT and FD indicate
4832 the size of GOT entries and function descriptors that must be
4833 placed within the range from -WRAP to WRAP. If there's room left,
4834 up to FDPLT bytes should be reserved for additional function
4835 descriptors. */
4839 bfd_signed_vma fdcur,
4840 bfd_signed_vma odd,
4841 bfd_signed_vma cur,
4842 bfd_vma got,
4843 bfd_vma fd,
4844 bfd_vma fdplt,
4845 bfd_vma tlsd,
4846 bfd_vma tlsdplt,
4847 bfd_vma wrap)
4848 {
4852 /* Start at the given initial points. */
4856 /* If we had an incoming odd word and we have any got entries that
4857 are going to use it, consume it, otherwise leave gad->odd at
4858 zero. We might force gad->odd to zero and return the incoming
4859 odd such that it is used by the next range, but then GOT entries
4860 might appear to be out of order and we wouldn't be able to
4861 shorten the GOT by one word if it turns out to end with an
4862 unpaired GOT entry. */
4864 {
4868 }
4869 else
4872 /* If we're left with an unpaired GOT entry, compute its location
4873 such that we can return it. Otherwise, if got doesn't require an
4874 odd number of words here, either odd was already zero in the
4875 block above, or it was set to zero because got was non-zero, or
4876 got was already zero. In the latter case, we want the value of
4877 odd to carry over to the return statement, so we don't want to
4878 reset odd unless the condition below is true. */
4880 {
4883 }
4885 /* Compute the tentative boundaries of this range. */
4890 /* If function descriptors took too much space, wrap some of them
4891 around. */
4893 {
4896 }
4898 /* If GOT entries took too much space, wrap some of them around.
4899 This may well cause gad->min to become lower than wrapmin. This
4900 will cause a relocation overflow later on, so we don't have to
4901 report it here . */
4903 {
4906 }
4908 /* Add TLS descriptors. */
4913 /* If TLS descriptors took too much space, wrap an integral number
4914 of them around. */
4916 {
4924 }
4926 /* If there is space left and we have function descriptors
4927 referenced in PLT entries that could take advantage of shorter
4928 offsets, place them now. */
4930 {
4931 bfd_vma fds;
4935 else
4942 }
4944 /* If there is more space left, try to place some more function
4945 descriptors for PLT entries. */
4947 {
4948 bfd_vma fds;
4952 else
4959 }
4961 /* If there is space left and we have TLS descriptors referenced in
4962 PLT entries that could take advantage of shorter offsets, place
4963 them now. */
4965 {
4966 bfd_vma tlsds;
4970 else
4976 }
4978 /* If there is more space left, try to place some more TLS
4979 descriptors for PLT entries. Although we could try to fit an
4980 additional TLS descriptor with half of it just before before the
4981 wrap point and another right past the wrap point, this might
4982 cause us to run out of space for the next region, so don't do
4983 it. */
4985 {
4986 bfd_vma tlsds;
4990 else
4996 }
4998 /* If odd was initially computed as an offset past the wrap point,
4999 wrap it around. */
5003 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
5004 before returning, so do it here too. This guarantees that,
5005 should cur and fdcur meet at the wrap point, they'll both be
5006 equal to min. */
5010 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
5016 }
5018 /* Compute the location of the next GOT entry, given the allocation
5019 data for a range. */
5023 {
5024 bfd_signed_vma ret;
5027 {
5028 /* If there was an odd word left behind, use it. */
5031 }
5032 else
5033 {
5034 /* Otherwise, use the word pointed to by cur, reserve the next
5035 as an odd word, and skip to the next pair of words, possibly
5036 wrapping around. */
5042 }
5045 }
5047 /* Compute the location of the next function descriptor entry in the
5048 GOT, given the allocation data for a range. */
5052 {
5053 /* If we're at the bottom, wrap around, and only then allocate the
5054 next pair of words. */
5058 }
5060 /* Compute the location of the next TLS descriptor entry in the GOT,
5061 given the allocation data for a range. */
5064 {
5065 bfd_signed_vma ret;
5071 /* If we're at the top of the region, wrap around to the bottom. */
5076 }
5078 /* Assign GOT offsets for every GOT entry and function descriptor.
5079 Doing everything in a single pass is tricky. */
5081 static int
5083 {
5104 {
5107 }
5111 {
5114 }
5116 {
5119 }
5133 {
5136 }
5140 {
5143 }
5145 {
5148 }
5153 }
5155 /* Assign GOT offsets to private function descriptors used by PLT
5156 entries (or referenced by 32-bit offsets), as well as PLT entries
5157 and lazy PLT entries. */
5159 static int
5161 {
5169 {
5172 /* We use the section's raw size to mark the location of the
5173 next PLT entry. */
5176 /* Figure out the length of this PLT entry based on the
5177 addressing mode we need to reach the function descriptor. */
5185 else
5189 }
5192 {
5195 /* If this entry is the one that gets the resolver stub, account
5196 for the additional instruction. */
5200 }
5203 {
5206 entry->tlsplt_entry
5212 {
5214 /* FIXME: here we use the size of the TLS section
5215 as an upper bound for the value of the TLS
5216 symbol, because we may not know the exact value
5217 yet. If we get it wrong, we'll just waste a
5218 word in the PLT, and we should never get even
5219 close to 32 KiB of TLS anyway. */
5224 else
5226 }
5228 {
5235 else
5237 }
5238 else
5239 {
5248 else
5250 }
5253 }
5256 }
5258 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5259 _frvfdpic_assign_plt_entries. */
5261 static int
5263 {
5276 }
5278 /* Follow indirect and warning hash entries so that each got entry
5279 points to the final symbol definition. P must point to a pointer
5280 to the hash table we're traversing. Since this traversal may
5281 modify the hash table, we set this pointer to NULL to indicate
5282 we've made a potentially-destructive change to the hash table, so
5283 the traversal must be restarted. */
5284 static int
5286 {
5291 {
5303 NO_INSERT);
5306 {
5307 /* Merge the two entries. */
5311 }
5315 /* If we can't find this entry with the new bfd hash, re-insert
5316 it, and get the traversal restarted. */
5318 {
5323 /* Abort the traversal, since the whole table may have
5324 moved, and leave it up to the parent to restart the
5325 process. */
5328 }
5329 }
5332 }
5334 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5335 section and the rofixup section. Assign locations for GOT and PLT
5336 entries. */
5338 static bfd_boolean
5341 {
5342 bfd_signed_vma odd;
5351 /* Compute the total size taken by entries in the 12-bit and 16-bit
5352 ranges, to tell how many PLT function descriptors we can bring
5353 into the 12-bit range without causing the 16-bit range to
5354 overflow. */
5360 else
5363 {
5366 }
5367 else
5372 /* Determine the ranges of GOT offsets that we can use for each
5373 range of addressing modes. */
5376 odd,
5380 limit,
5382 tlslimit,
5386 odd,
5398 odd,
5411 /* Now assign (most) GOT offsets. */
5413 gpinfop);
5417 /* If an odd word is the last word of the GOT, we don't need this
5418 word to be part of the GOT. */
5424 {
5427 }
5428 /* This will be non-NULL during relaxation. The assumption is that
5429 the size of one of these sections will never grow, only shrink,
5430 so we can use the larger buffer we allocated before. */
5432 {
5438 }
5441 /* Subtract the number of lzplt entries, since those will generate
5442 relocations in the pltrel section. */
5446 else
5451 {
5457 }
5463 {
5469 }
5472 {
5479 {
5485 }
5486 }
5488 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5489 such that there's room for the additional instruction needed to
5490 call the resolver. Since _frvfdpic_assign_got_entries didn't
5491 account for them, our block size is 4 bytes smaller than the real
5492 block size. */
5494 {
5498 }
5500 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5501 actually assign lazy PLT entries addresses. */
5504 /* Save information that we're going to need to generate GOT and PLT
5505 entries. */
5516 /* Allocate a ret statement at plt_initial_offset, to be used by
5517 locally-resolved TLS descriptors. */
5522 gpinfop);
5524 /* Allocate the PLT section contents only after
5525 _frvfdpic_assign_plt_entries has a chance to add the size of the
5526 non-lazy PLT entries. */
5528 {
5532 {
5538 }
5539 }
5542 }
5544 /* Set the sizes of the dynamic sections. */
5546 static bfd_boolean
5549 {
5558 {
5559 /* Set the contents of the .interp section to the interpreter. */
5561 {
5566 }
5567 }
5573 {
5580 }
5585 /* Allocate space to save the summary information, we're going to
5586 use it if we're doing relaxations. */
5593 {
5610 }
5613 }
5615 static bfd_boolean
5618 {
5620 {
5624 /* Force a PT_GNU_STACK segment to be created. */
5628 /* Define __stacksize if it's not defined yet. */
5634 {
5647 /* This one must NOT be hidden. */
5648 }
5650 /* Create a stack section, and set its alignment. */
5656 }
5659 }
5661 /* Look for opportunities to relax TLS relocations. We can assume
5662 we're linking the main executable or a static-tls library, since
5663 otherwise we wouldn't have got here. */
5665 static int
5667 {
5674 }
5676 static bfd_boolean
5679 {
5682 /* If we return early, we didn't change anything. */
5685 /* We'll do our thing when requested to relax the GOT section. */
5689 /* We can only relax when linking the main executable or a library
5690 that can't be dlopened. */
5694 /* If there isn't a TLS section for this binary, we can't do
5695 anything about its TLS relocations (it probably doesn't have
5696 any. */
5703 /* Now look for opportunities to relax, adjusting the GOT usage
5704 as needed. */
5706 _frvfdpic_relax_got_plt_entries,
5709 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5712 {
5713 /* Clear GOT and PLT assignments. */
5715 _frvfdpic_reset_got_plt_entries,
5716 NULL);
5718 /* The owner of the TLS section is the output bfd. There should
5719 be a better way to get to it. */
5724 /* Repeat until we don't make any further changes. We could fail to
5725 introduce changes in a round if, for example, the 12-bit range is
5726 full, but we later release some space by getting rid of TLS
5727 descriptors in it. We have to repeat the whole process because
5728 we might have changed the size of a section processed before this
5729 one. */
5731 }
5734 }
5736 static bfd_boolean
5739 {
5742 /* objcopy and strip preserve what's already there using
5743 elf32_frvfdpic_copy_private_bfd_data (). */
5752 {
5757 {
5758 /* Obtain the pointer to the __stacksize symbol. */
5766 /* Set the section size from the symbol value. We
5767 intentionally ignore the symbol section. */
5770 else
5773 /* Add the stack section to the PT_GNU_STACK segment,
5774 such that its size and alignment requirements make it
5775 to the segment. */
5778 }
5779 }
5782 }
5784 /* Fill in code and data in dynamic sections. */
5786 static bfd_boolean
5789 {
5790 /* Nothing to be done for non-FDPIC. */
5792 }
5794 static bfd_boolean
5797 {
5804 {
5806 }
5808 {
5814 {
5826 {
5827 error:
5831 }
5838 {
5839 bfd_vma value =
5848 }
5849 }
5850 }
5852 {
5856 }
5860 {
5872 {
5873 Elf_Internal_Dyn dyn;
5878 {
5900 }
5901 }
5902 }
5905 }
5907 /* Adjust a symbol defined by a dynamic object and referenced by a
5908 regular object. */
5910 static bfd_boolean
5911 elf32_frvfdpic_adjust_dynamic_symbol
5914 {
5919 /* Make sure we know what is going on here. */
5926 /* If this is a weak symbol, and there is a real definition, the
5927 processor independent code will have arranged for us to see the
5928 real definition first, and we can just use the same value. */
5930 {
5935 }
5938 }
5940 /* Perform any actions needed for dynamic symbols. */
5942 static bfd_boolean
5943 elf32_frvfdpic_finish_dynamic_symbol
5948 {
5950 }
5952 /* Decide whether to attempt to turn absptr or lsda encodings in
5953 shared libraries into pcrel within the given input section. */
5955 static bfd_boolean
5956 frvfdpic_elf_use_relative_eh_frame
5960 {
5961 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
5963 }
5965 /* Adjust the contents of an eh_frame_hdr section before they're output. */
5967 static bfd_byte
5973 {
5985 == (_frvfdpic_osec_to_segment
5994 }
5996 /* Look through the relocs for a section during the first phase.
5998 Besides handling virtual table relocs for gc, we have to deal with
5999 all sorts of PIC-related relocations. We describe below the
6000 general plan on how to handle such relocations, even though we only
6001 collect information at this point, storing them in hash tables for
6002 perusal of later passes.
6004 32 relocations are propagated to the linker output when creating
6005 position-independent output. LO16 and HI16 relocations are not
6006 supposed to be encountered in this case.
6008 LABEL16 should always be resolvable by the linker, since it's only
6009 used by branches.
6011 LABEL24, on the other hand, is used by calls. If it turns out that
6012 the target of a call is a dynamic symbol, a PLT entry must be
6013 created for it, which triggers the creation of a private function
6014 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
6016 GPREL relocations require the referenced symbol to be in the same
6017 segment as _gp, but this can only be checked later.
6019 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
6020 exist. LABEL24 might as well, since it may require a PLT entry,
6021 that will require a got.
6023 Non-FUNCDESC GOT relocations require a GOT entry to be created
6024 regardless of whether the symbol is dynamic. However, since a
6025 global symbol that turns out to not be exported may have the same
6026 address of a non-dynamic symbol, we don't assign GOT entries at
6027 this point, such that we can share them in this case. A relocation
6028 for the GOT entry always has to be created, be it to offset a
6029 private symbol by the section load address, be it to get the symbol
6030 resolved dynamically.
6032 FUNCDESC GOT relocations require a GOT entry to be created, and
6033 handled as if a FUNCDESC relocation was applied to the GOT entry in
6034 an object file.
6036 FUNCDESC relocations referencing a symbol that turns out to NOT be
6037 dynamic cause a private function descriptor to be created. The
6038 FUNCDESC relocation then decays to a 32 relocation that points at
6039 the private descriptor. If the symbol is dynamic, the FUNCDESC
6040 relocation is propagated to the linker output, such that the
6041 dynamic linker creates the canonical descriptor, pointing to the
6042 dynamically-resolved definition of the function.
6044 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
6045 symbols that are assigned to the same segment as the GOT, but we
6046 can only check this later, after we know the complete set of
6047 symbols defined and/or exported.
6049 FUNCDESC GOTOFF relocations require a function descriptor to be
6050 created and, unless lazy binding is disabled or the symbol is not
6051 dynamic, a lazy PLT entry. Since we can't tell at this point
6052 whether a symbol is going to be dynamic, we have to decide later
6053 whether to create a lazy PLT entry or bind the descriptor directly
6054 to the private function.
6056 FUNCDESC_VALUE relocations are not supposed to be present in object
6057 files, but they may very well be simply propagated to the linker
6058 output, since they have no side effect.
6061 A function descriptor always requires a FUNCDESC_VALUE relocation.
6062 Whether it's in .plt.rel or not depends on whether lazy binding is
6063 enabled and on whether the referenced symbol is dynamic.
6065 The existence of a lazy PLT requires the resolverStub lazy PLT
6066 entry to be present.
6069 As for assignment of GOT, PLT and lazy PLT entries, and private
6070 descriptors, we might do them all sequentially, but we can do
6071 better than that. For example, we can place GOT entries and
6072 private function descriptors referenced using 12-bit operands
6073 closer to the PIC register value, such that these relocations don't
6074 overflow. Those that are only referenced with LO16 relocations
6075 could come next, but we may as well place PLT-required function
6076 descriptors in the 12-bit range to make them shorter. Symbols
6077 referenced with LO16/HI16 may come next, but we may place
6078 additional function descriptors in the 16-bit range if we can
6079 reliably tell that we've already placed entries that are ever
6080 referenced with only LO16. PLT entries are therefore generated as
6081 small as possible, while not introducing relocation overflows in
6082 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6083 generated before or after PLT entries, but not intermingled with
6084 them, such that we can have more lazy PLT entries in range for a
6085 branch to the resolverStub. The resolverStub should be emitted at
6086 the most distant location from the first lazy PLT entry such that
6087 it's still in range for a branch, or closer, if there isn't a need
6088 for so many lazy PLT entries. Additional lazy PLT entries may be
6089 emitted after the resolverStub, as long as branches are still in
6090 range. If the branch goes out of range, longer lazy PLT entries
6091 are emitted.
6093 We could further optimize PLT and lazy PLT entries by giving them
6094 priority in assignment to closer-to-gr17 locations depending on the
6095 number of occurrences of references to them (assuming a function
6096 that's called more often is more important for performance, so its
6097 PLT entry should be faster), or taking hints from the compiler.
6098 Given infinite time and money... :-) */
6100 static bfd_boolean
6106 {
6126 {
6133 else
6137 {
6167 /* Fall through. */
6175 {
6179 }
6181 {
6184 }
6186 {
6189 {
6196 }
6197 picrel
6201 }
6202 else
6213 }
6216 {
6226 /* Fall through. */
6314 /* This relocation describes the C++ object vtable hierarchy.
6315 Reconstruct it for later use during GC. */
6321 /* This relocation describes which C++ vtable entries are actually
6322 used. Record for later use during GC. */
6342 bad_reloc:
6347 }
6348 }
6351 }
6353 \f
6354 /* Return the machine subcode from the ELF e_flags header. */
6356 static int
6359 {
6361 {
6371 }
6374 }
6376 /* Set the right machine number for a FRV ELF file. */
6378 static bfd_boolean
6381 {
6385 }
6386 \f
6387 /* Function to set the ELF flag bits. */
6389 static bfd_boolean
6392 flagword flags;
6393 {
6397 }
6399 /* Copy backend specific data from one object module to another. */
6401 static bfd_boolean
6405 {
6416 }
6418 /* Return true if the architecture described by elf header flag
6419 EXTENSION is an extension of the architecture described by BASE. */
6421 static bfd_boolean
6423 {
6427 /* CPU_GENERIC code can be merged with code for a specific
6428 architecture, in which case the result is marked as being
6429 for the specific architecture. Everything is therefore
6430 an extension of CPU_GENERIC. */
6443 }
6445 static bfd_boolean
6447 {
6461 /* Copy the stack size. */
6464 {
6469 {
6472 /* Rewrite the phdrs, since we're only called after they
6473 were first written. */
6481 }
6484 }
6487 }
6489 /* Merge backend specific data from an object file to the output
6490 object file when linking. */
6492 static bfd_boolean
6496 {
6510 #ifdef DEBUG
6514 #endif
6517 {
6520 }
6523 ;
6526 {
6527 /* Warn if different # of gprs are used. Note, 0 means nothing is
6528 said about the size of gprs. */
6532 ;
6535 ;
6540 else
6541 {
6543 {
6547 }
6550 {
6554 }
6555 }
6557 /* Warn if different # of fprs are used. Note, 0 means nothing is
6558 said about the size of fprs. */
6562 ;
6565 ;
6570 else
6571 {
6573 {
6578 }
6581 {
6586 }
6587 }
6589 /* Warn if different dword support was used. Note, 0 means nothing is
6590 said about the dword support. */
6594 ;
6597 ;
6602 else
6603 {
6605 {
6609 }
6612 {
6616 }
6617 }
6619 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6620 feature is used. */
6622 | EF_FRV_MEDIA
6623 | EF_FRV_MULADD
6626 /* If any module was compiled without -G0, clear the G0 bit. */
6630 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6634 /* We don't have to do anything if the pic flags are the same, or the new
6635 module(s) were compiled with -mlibrary-pic. */
6639 ;
6641 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6642 flags if any from the new module. */
6646 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6650 /* One module was compiled for pic and the other was not, see if we have
6651 had any relocations that are not pic-safe. */
6652 else
6653 {
6656 else
6657 {
6659 #ifndef FRV_NO_PIC_ERROR
6665 #endif
6666 }
6667 }
6669 /* Warn if different cpu is used (allow a specific cpu to override
6670 the generic cpu). */
6674 ;
6679 else
6680 {
6682 {
6693 }
6696 {
6707 }
6708 }
6710 /* Print out any mismatches from above. */
6712 {
6717 }
6719 /* Warn about any other mismatches */
6723 {
6729 }
6730 }
6732 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6736 /* Update the old flags now with changes made above. */
6744 {
6750 else
6754 }
6760 }
6762 \f
6763 bfd_boolean
6766 PTR ptr;
6767 {
6769 flagword flags;
6773 /* Print normal ELF private data. */
6780 {
6790 }
6793 {
6797 }
6800 {
6805 }
6808 {
6812 }
6843 }
6845 \f
6846 #define ELF_ARCH bfd_arch_frv
6847 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6848 #define ELF_MAXPAGESIZE 0x1000
6850 #define TARGET_BIG_SYM bfd_elf32_frv_vec
6853 #define elf_info_to_howto frv_info_to_howto_rela
6854 #define elf_backend_relocate_section elf32_frv_relocate_section
6855 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6856 #define elf_backend_gc_sweep_hook elf32_frv_gc_sweep_hook
6857 #define elf_backend_check_relocs elf32_frv_check_relocs
6858 #define elf_backend_object_p elf32_frv_object_p
6859 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
6861 #define elf_backend_can_gc_sections 1
6862 #define elf_backend_rela_normal 1
6864 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
6865 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
6866 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
6867 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
6868 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
6870 #define elf_backend_want_got_sym 1
6871 #define elf_backend_got_header_size 0
6872 #define elf_backend_want_got_plt 0
6873 #define elf_backend_plt_readonly 1
6874 #define elf_backend_want_plt_sym 0
6875 #define elf_backend_plt_header_size 0
6877 #define elf_backend_finish_dynamic_sections \
6878 elf32_frv_finish_dynamic_sections
6882 #undef ELF_MAXPAGESIZE
6883 #define ELF_MAXPAGESIZE 0x4000
6885 #undef TARGET_BIG_SYM
6886 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
6887 #undef TARGET_BIG_NAME
6889 #undef elf32_bed
6890 #define elf32_bed elf32_frvfdpic_bed
6892 #undef elf_info_to_howto_rel
6893 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
6895 #undef bfd_elf32_bfd_link_hash_table_create
6896 #define bfd_elf32_bfd_link_hash_table_create \
6897 frvfdpic_elf_link_hash_table_create
6898 #undef elf_backend_always_size_sections
6899 #define elf_backend_always_size_sections \
6900 elf32_frvfdpic_always_size_sections
6901 #undef elf_backend_modify_segment_map
6902 #define elf_backend_modify_segment_map \
6903 elf32_frvfdpic_modify_segment_map
6904 #undef bfd_elf32_bfd_copy_private_bfd_data
6905 #define bfd_elf32_bfd_copy_private_bfd_data \
6906 elf32_frvfdpic_copy_private_bfd_data
6908 #undef elf_backend_create_dynamic_sections
6909 #define elf_backend_create_dynamic_sections \
6910 elf32_frvfdpic_create_dynamic_sections
6911 #undef elf_backend_adjust_dynamic_symbol
6912 #define elf_backend_adjust_dynamic_symbol \
6913 elf32_frvfdpic_adjust_dynamic_symbol
6914 #undef elf_backend_size_dynamic_sections
6915 #define elf_backend_size_dynamic_sections \
6916 elf32_frvfdpic_size_dynamic_sections
6917 #undef bfd_elf32_bfd_relax_section
6918 #define bfd_elf32_bfd_relax_section \
6919 elf32_frvfdpic_relax_section
6920 #undef elf_backend_finish_dynamic_symbol
6921 #define elf_backend_finish_dynamic_symbol \
6922 elf32_frvfdpic_finish_dynamic_symbol
6923 #undef elf_backend_finish_dynamic_sections
6924 #define elf_backend_finish_dynamic_sections \
6925 elf32_frvfdpic_finish_dynamic_sections
6927 #undef elf_backend_can_make_relative_eh_frame
6928 #define elf_backend_can_make_relative_eh_frame \
6929 frvfdpic_elf_use_relative_eh_frame
6930 #undef elf_backend_can_make_lsda_relative_eh_frame
6931 #define elf_backend_can_make_lsda_relative_eh_frame \
6932 frvfdpic_elf_use_relative_eh_frame
6933 #undef elf_backend_encode_eh_address
6934 #define elf_backend_encode_eh_address \
6935 frvfdpic_elf_encode_eh_address
6937 #undef elf_backend_may_use_rel_p
6938 #define elf_backend_may_use_rel_p 1
6939 #undef elf_backend_may_use_rela_p
6940 #define elf_backend_may_use_rela_p 1
6941 /* We use REL for dynamic relocations only. */
6942 #undef elf_backend_default_use_rela_p
6943 #define elf_backend_default_use_rela_p 1
6945 #undef elf_backend_omit_section_dynsym
6946 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym