| blob | 1758e27591fa1a27d64aabfed624a2c24dca388b |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright 2002, 2003, 2004, 2005, 2006 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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
87 {
88 /* This reloc does nothing. */
103 /* A 32 bit absolute relocation. */
118 /* A 16 bit pc-relative relocation. */
133 /* A 24-bit pc-relative relocation. */
246 /* A 12-bit signed operand with the GOT offset for the address of
247 the symbol. */
262 /* The upper 16 bits of the GOT offset for the address of the
263 symbol. */
278 /* The lower 16 bits of the GOT offset for the address of the
279 symbol. */
294 /* The 32-bit address of the canonical descriptor of a function. */
309 /* A 12-bit signed operand with the GOT offset for the address of
310 canonical descriptor of a function. */
325 /* The upper 16 bits of the GOT offset for the address of the
326 canonical descriptor of a function. */
341 /* The lower 16 bits of the GOT offset for the address of the
342 canonical descriptor of a function. */
357 /* The 64-bit descriptor of a function. */
372 /* A 12-bit signed operand with the GOT offset for the address of
373 canonical descriptor of a function. */
388 /* The upper 16 bits of the GOT offset for the address of the
389 canonical descriptor of a function. */
404 /* The lower 16 bits of the GOT offset for the address of the
405 canonical descriptor of a function. */
420 /* A 12-bit signed operand with the GOT offset for the address of
421 the symbol. */
436 /* The upper 16 bits of the GOT offset for the address of the
437 symbol. */
452 /* The lower 16 bits of the GOT offset for the address of the
453 symbol. */
468 /* A 24-bit pc-relative relocation referencing the TLS PLT entry for
469 a thread-local symbol. If the symbol number is 0, it refers to
470 the module. */
485 /* A 64-bit TLS descriptor for a symbol. This relocation is only
486 valid as a REL, dynamic relocation. */
501 /* A 12-bit signed operand with the GOT offset for the TLS
502 descriptor of the symbol. */
517 /* The upper 16 bits of the GOT offset for the TLS descriptor of the
518 symbol. */
533 /* The lower 16 bits of the GOT offset for the TLS descriptor of the
534 symbol. */
549 /* A 12-bit signed operand with the offset from the module base
550 address to the thread-local symbol address. */
565 /* The upper 16 bits of the offset from the module base address to
566 the thread-local symbol address. */
581 /* The lower 16 bits of the offset from the module base address to
582 the thread-local symbol address. */
597 /* A 12-bit signed operand with the GOT offset for the TLSOFF entry
598 for a symbol. */
613 /* The upper 16 bits of the GOT offset for the TLSOFF entry for a
614 symbol. */
629 /* The lower 16 bits of the GOT offset for the TLSOFF entry for a
630 symbol. */
645 /* The 32-bit offset from the thread pointer (not the module base
646 address) to a thread-local symbol. */
661 /* An annotation for linker relaxation, that denotes the
662 symbol+addend whose TLS descriptor is referenced by the sum of
663 the two input registers of an ldd instruction. */
678 /* An annotation for linker relaxation, that denotes the
679 symbol+addend whose TLS resolver entry point is given by the sum
680 of the two register operands of an calll instruction. */
695 /* An annotation for linker relaxation, that denotes the
696 symbol+addend whose TLS offset GOT entry is given by the sum of
697 the two input registers of an ld instruction. */
712 /* A 32-bit offset from the module base address to
713 the thread-local symbol address. */
727 };
729 /* GNU extension to record C++ vtable hierarchy. */
745 /* GNU extension to record C++ vtable member usage. */
761 /* The following 3 relocations are REL. The only difference to the
762 entries in the table above are that partial_inplace is TRUE. */
809 /* A 64-bit TLS descriptor for a symbol. The first word resolves to
810 an entry point, and the second resolves to a special argument.
811 If the symbol turns out to be in static TLS, the entry point is a
812 return instruction, and the special argument is the TLS offset
813 for the symbol. If it's in dynamic TLS, the entry point is a TLS
814 offset resolver, and the special argument is a pointer to a data
815 structure allocated by the dynamic loader, containing the GOT
816 address for the offset resolver, the module id, the offset within
817 the module, and anything else the TLS offset resolver might need
818 to determine the TLS offset for the symbol in the running
819 thread. */
835 /* The 32-bit offset from the thread pointer (not the module base
836 address) to a thread-local symbol. */
852 \f
854 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_frvfdpic_vec)
856 /* An extension of the elf hash table data structure, containing some
857 additional FRV-specific data. */
858 struct frvfdpic_elf_link_hash_table
859 {
862 /* A pointer to the .got section. */
864 /* A pointer to the .rel.got section. */
866 /* A pointer to the .rofixup section. */
868 /* A pointer to the .plt section. */
870 /* A pointer to the .rel.plt section. */
872 /* GOT base offset. */
873 bfd_vma got0;
874 /* Location of the first non-lazy PLT entry, i.e., the number of
875 bytes taken by lazy PLT entries. If locally-bound TLS
876 descriptors require a ret instruction, it will be placed at this
877 offset. */
878 bfd_vma plt0;
879 /* A hash table holding information about which symbols were
880 referenced with which PIC-related relocations. */
882 /* Summary reloc information collected by
883 _frvfdpic_count_got_plt_entries. */
885 };
887 /* Get the FRV ELF linker hash table from a link_info structure. */
889 #define frvfdpic_hash_table(info) \
890 ((struct frvfdpic_elf_link_hash_table *) ((info)->hash))
892 #define frvfdpic_got_section(info) \
893 (frvfdpic_hash_table (info)->sgot)
894 #define frvfdpic_gotrel_section(info) \
895 (frvfdpic_hash_table (info)->sgotrel)
896 #define frvfdpic_gotfixup_section(info) \
897 (frvfdpic_hash_table (info)->sgotfixup)
898 #define frvfdpic_plt_section(info) \
899 (frvfdpic_hash_table (info)->splt)
900 #define frvfdpic_pltrel_section(info) \
901 (frvfdpic_hash_table (info)->spltrel)
902 #define frvfdpic_relocs_info(info) \
903 (frvfdpic_hash_table (info)->relocs_info)
904 #define frvfdpic_got_initial_offset(info) \
905 (frvfdpic_hash_table (info)->got0)
906 #define frvfdpic_plt_initial_offset(info) \
907 (frvfdpic_hash_table (info)->plt0)
908 #define frvfdpic_dynamic_got_plt_info(info) \
909 (frvfdpic_hash_table (info)->g)
911 /* Currently it's the same, but if some day we have a reason to change
912 it, we'd better be using a different macro.
914 FIXME: if there's any TLS PLT entry that uses local-exec or
915 initial-exec models, we could use the ret at the end of any of them
916 instead of adding one more. */
917 #define frvfdpic_plt_tls_ret_offset(info) \
918 (frvfdpic_plt_initial_offset (info))
920 /* The name of the dynamic interpreter. This is put in the .interp
921 section. */
925 #define DEFAULT_STACK_SIZE 0x20000
927 /* This structure is used to collect the number of entries present in
928 each addressable range of the got. */
929 struct _frvfdpic_dynamic_got_info
930 {
931 /* Several bits of information about the current link. */
933 /* Total GOT size needed for GOT entries within the 12-, 16- or 32-bit
934 ranges. */
936 /* Total GOT size needed for function descriptor entries within the 12-,
937 16- or 32-bit ranges. */
939 /* Total GOT size needed by function descriptor entries referenced
940 in PLT entries, that would be profitable to place in offsets
941 close to the PIC register. */
942 bfd_vma fdplt;
943 /* Total PLT size needed by lazy PLT entries. */
944 bfd_vma lzplt;
945 /* Total GOT size needed for TLS descriptor entries within the 12-,
946 16- or 32-bit ranges. */
948 /* Total GOT size needed by TLS descriptors referenced in PLT
949 entries, that would be profitable to place in offers close to the
950 PIC register. */
951 bfd_vma tlsdplt;
952 /* Total PLT size needed by TLS lazy PLT entries. */
953 bfd_vma tlslzplt;
954 /* Number of relocations carried over from input object files. */
956 /* Number of fixups introduced by relocations in input object files. */
958 /* The number of fixups that reference the ret instruction added to
959 the PLT for locally-resolved TLS descriptors. */
961 };
963 /* This structure is used to assign offsets to got entries, function
964 descriptors, plt entries and lazy plt entries. */
966 struct _frvfdpic_dynamic_got_plt_info
967 {
968 /* Summary information collected with _frvfdpic_count_got_plt_entries. */
971 /* For each addressable range, we record a MAX (positive) and MIN
972 (negative) value. CUR is used to assign got entries, and it's
973 incremented from an initial positive value to MAX, then from MIN
974 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
975 assign function descriptors, and it's decreased from an initial
976 non-positive value to MIN, then from MAX down to CUR (unless CUR
977 wraps around first). All of MIN, MAX, CUR and FDCUR always point
978 to even words. ODD, if non-zero, indicates an odd word to be
979 used for the next got entry, otherwise CUR is used and
980 incremented by a pair of words, wrapping around when it reaches
981 MAX. FDCUR is decremented (and wrapped) before the next function
982 descriptor is chosen. FDPLT indicates the number of remaining
983 slots that can be used for function descriptors used only by PLT
984 entries.
986 TMAX, TMIN and TCUR are used to assign TLS descriptors. TCUR
987 starts as MAX, and grows up to TMAX, then wraps around to TMIN
988 and grows up to MIN. TLSDPLT indicates the number of remaining
989 slots that can be used for TLS descriptors used only by TLS PLT
990 entries. */
991 struct _frvfdpic_dynamic_got_alloc_data
992 {
997 };
999 /* Create an FRV ELF linker hash table. */
1003 {
1012 _bfd_elf_link_hash_newfunc,
1014 {
1017 }
1020 }
1022 /* Decide whether a reference to a symbol can be resolved locally or
1023 not. If the symbol is protected, we want the local address, but
1024 its function descriptor must be assigned by the dynamic linker. */
1025 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
1026 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1027 || ! elf_hash_table (INFO)->dynamic_sections_created)
1028 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
1029 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1031 /* This structure collects information on what kind of GOT, PLT or
1032 function descriptors are required by relocations that reference a
1033 certain symbol. */
1034 struct frvfdpic_relocs_info
1035 {
1036 /* The index of the symbol, as stored in the relocation r_info, if
1037 we have a local symbol; -1 otherwise. */
1039 union
1040 {
1041 /* The input bfd in which the symbol is defined, if it's a local
1042 symbol. */
1044 /* If symndx == -1, the hash table entry corresponding to a global
1045 symbol (even if it turns out to bind locally, in which case it
1046 should ideally be replaced with section's symndx + addend). */
1049 /* The addend of the relocation that references the symbol. */
1050 bfd_vma addend;
1052 /* The fields above are used to identify an entry. The fields below
1053 contain information on how an entry is used and, later on, which
1054 locations it was assigned. */
1055 /* The following 3 fields record whether the symbol+addend above was
1056 ever referenced with a GOT relocation. The 12 suffix indicates a
1057 GOT12 relocation; los is used for GOTLO relocations that are not
1058 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1059 pairs. */
1063 /* Whether a FUNCDESC relocation references symbol+addend. */
1065 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1069 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1073 /* Whether a GETTLSOFF relocation references symbol+addend. */
1075 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1076 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1077 We might instead just pre-compute flags telling whether the
1078 object is suitable for local exec, initial exec or general
1079 dynamic addressing, and use that all over the place. We could
1080 also try to do a better job of merging TLSOFF and TLSDESC entries
1081 in main executables, but perhaps we can get rid of TLSDESC
1082 entirely in them instead. */
1083 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1087 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1091 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1092 GOTOFFHI relocations. The addend doesn't really matter, since we
1093 envision that this will only be used to check whether the symbol
1094 is mapped to the same segment as the got. */
1096 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1098 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1099 relocation. */
1101 /* Whether we need a PLT entry for a symbol. Should be implied by
1102 something like:
1103 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1105 /* Whether a function descriptor should be created in this link unit
1106 for symbol+addend. Should be implied by something like:
1107 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1108 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1109 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1111 /* Whether a lazy PLT entry is needed for this symbol+addend.
1112 Should be implied by something like:
1113 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1114 && ! (info->flags & DF_BIND_NOW)) */
1116 /* Whether we've already emitted GOT relocations and PLT entries as
1117 needed for this symbol. */
1120 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1121 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1122 symbol+addend. */
1125 /* The number of .rofixups entries and dynamic relocations allocated
1126 for this symbol, minus any that might have already been used. */
1129 /* The offsets of the GOT entries assigned to symbol+addend, to the
1130 function descriptor's address, and to a function descriptor,
1131 respectively. Should be zero if unassigned. The offsets are
1132 counted from the value that will be assigned to the PIC register,
1133 not from the beginning of the .got section. */
1135 /* The offsets of the PLT entries assigned to symbol+addend,
1136 non-lazy and lazy, respectively. If unassigned, should be
1137 (bfd_vma)-1. */
1139 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1141 /* The offset of the TLS offset PLT entry. */
1142 bfd_vma tlsplt_entry;
1143 };
1145 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1146 static hashval_t
1148 {
1154 }
1156 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1157 identical. */
1158 static int
1160 {
1166 }
1168 /* Find or create an entry in a hash table HT that matches the key
1169 fields of the given ENTRY. If it's not found, memory for a new
1170 entry is allocated in ABFD's obstack. */
1176 {
1199 }
1201 /* Obtain the address of the entry in HT associated with H's symbol +
1202 addend, creating a new entry if none existed. ABFD is only used
1203 for memory allocation purposes. */
1208 bfd_vma addend,
1210 {
1218 }
1220 /* Obtain the address of the entry in HT associated with the SYMNDXth
1221 local symbol of the input bfd ABFD, plus the addend, creating a new
1222 entry if none existed. */
1227 bfd_vma addend,
1229 {
1237 }
1239 /* Merge fields set by check_relocs() of two entries that end up being
1240 mapped to the same (presumably global) symbol. */
1245 {
1266 }
1268 /* Every block of 65535 lazy PLT entries shares a single call to the
1269 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1270 32767, counting from 0). All other lazy PLT entries branch to it
1271 in a single instruction. */
1273 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1274 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1276 /* Add a dynamic relocation to the SRELOC section. */
1282 {
1283 Elf_Internal_Rela outrel;
1284 bfd_vma reloc_offset;
1296 /* If the entry's index is zero, this relocation was probably to a
1297 linkonce section that got discarded. We reserved a dynamic
1298 relocation, but it was for another entry than the one we got at
1299 the time of emitting the relocation. Unfortunately there's no
1300 simple way for us to catch this situation, since the relocation
1301 is cleared right before calling relocate_section, at which point
1302 we no longer know what the relocation used to point to. */
1304 {
1307 }
1310 }
1312 /* Add a fixup to the ROFIXUP section. */
1314 static bfd_vma
1317 {
1318 bfd_vma fixup_offset;
1325 {
1328 }
1332 {
1333 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1334 above. */
1337 }
1340 }
1342 /* Find the segment number in which OSEC, and output section, is
1343 located. */
1345 static unsigned
1347 {
1351 /* Find the segment that contains the output_section. */
1356 {
1365 }
1368 }
1372 {
1376 }
1378 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1380 /* Return the base VMA address which should be subtracted from real addresses
1381 when resolving TLSMOFF relocation.
1382 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1384 static bfd_vma
1386 {
1387 /* If tls_sec is NULL, we should have signalled an error already. */
1391 }
1393 /* Generate relocations for GOT entries, function descriptors, and
1394 code for PLT and lazy PLT entries. */
1402 bfd_vma addend)
1404 {
1414 {
1415 /* If the symbol is dynamic, consider it for dynamic
1416 relocations, otherwise decay to section + offset. */
1419 else
1420 {
1425 else
1427 }
1428 }
1430 /* Generate relocation for GOT entry pointing to the symbol. */
1432 {
1436 /* If the symbol is dynamic but binds locally, use
1437 section+offset. */
1440 {
1443 else
1448 else
1450 }
1452 /* If we're linking an executable at a fixed address, we can
1453 omit the dynamic relocation as long as the symbol is local to
1454 this module. */
1458 {
1466 ->vma
1470 }
1471 else
1473 _bfd_elf_section_offset
1487 }
1489 /* Generate relocation for GOT entry pointing to a canonical
1490 function descriptor. */
1492 {
1499 {
1500 /* If the symbol is dynamic and there may be dynamic symbol
1501 resolution because we are, or are linked with, a shared
1502 library, emit a FUNCDESC relocation such that the dynamic
1503 linker will allocate the function descriptor. If the
1504 symbol needs a non-local function descriptor but binds
1505 locally (e.g., its visibility is protected, emit a
1506 dynamic relocation decayed to section+offset. */
1511 {
1517 }
1520 {
1525 {
1532 }
1533 }
1534 else
1535 {
1536 /* Otherwise, we know we have a private function descriptor,
1537 so reference it directly. */
1545 }
1547 /* If there is room for dynamic symbol resolution, emit the
1548 dynamic relocation. However, if we're linking an
1549 executable at a fixed location, we won't have emitted a
1550 dynamic symbol entry for the got section, so idx will be
1551 zero, which means we can and should compute the address
1552 of the private descriptor ourselves. */
1556 {
1563 ->output_offset
1566 }
1567 else
1570 _bfd_elf_section_offset
1580 }
1586 }
1588 /* Generate relocation to fill in a private function descriptor in
1589 the GOT. */
1591 {
1594 bfd_vma ofst;
1597 /* If the symbol is dynamic but binds locally, use
1598 section+offset. */
1601 {
1604 else
1609 else
1611 }
1613 /* If we're linking an executable at a fixed address, we can
1614 omit the dynamic relocation as long as the symbol is local to
1615 this module. */
1618 {
1624 {
1630 ->output_offset
1638 ->output_offset
1641 }
1642 }
1643 else
1644 {
1645 ofst =
1647 entry->lazyplt
1650 _bfd_elf_section_offset
1660 }
1662 /* If we've omitted the dynamic relocation, just emit the fixed
1663 addresses of the symbol and of the local GOT base offset. */
1665 {
1670 }
1672 {
1674 {
1681 }
1685 /* A function descriptor used for lazy or local resolving is
1686 initialized such that its high word contains the output
1687 section index in which the PLT entries are located, and
1688 the low word contains the address of the lazy PLT entry
1689 entry point, that must be within the memory region
1690 assigned to that section. */
1694 highword = _frvfdpic_osec_to_segment
1696 }
1697 else
1698 {
1699 /* A function descriptor for a local function gets the index
1700 of the section. For a non-local function, it's
1701 disregarded. */
1706 else
1707 highword = _frvfdpic_osec_to_segment
1709 }
1719 }
1721 /* Generate code for the PLT entry. */
1723 {
1729 /* Figure out what kind of PLT entry we need, depending on the
1730 location of the function descriptor within the GOT. */
1733 {
1734 /* lddi @(gr15, fd_entry), gr14 */
1737 plt_code);
1739 }
1740 else
1741 {
1744 {
1745 /* setlos lo(fd_entry), gr14 */
1747 0x9cfc0000
1749 plt_code);
1751 }
1752 else
1753 {
1754 /* sethi.p hi(fd_entry), gr14
1755 setlo lo(fd_entry), gr14 */
1757 0x1cf80000
1760 plt_code);
1763 0x9cf40000
1765 plt_code);
1767 }
1768 /* ldd @(gr14,gr15),gr14 */
1771 }
1772 /* jmpl @(gr14,gr0) */
1774 }
1776 /* Generate code for the lazy PLT entry. */
1778 {
1781 bfd_vma resolverStub_addr;
1792 {
1793 /* This is a lazy PLT entry that includes a resolver call. */
1794 /* ldd @(gr15,gr0), gr4
1795 jmpl @(gr4,gr0) */
1798 }
1799 else
1800 {
1801 /* bra resolverStub */
1803 0xc01a0000
1806 lzplt_code);
1807 }
1808 }
1810 /* Generate relocation for GOT entry holding the TLS offset. */
1812 {
1818 {
1819 /* If the symbol is dynamic but binds locally, use
1820 section+offset. */
1822 {
1825 else
1831 else
1833 }
1834 }
1836 /* *ABS*+addend is special for TLS relocations, use only the
1837 addend. */
1842 ;
1843 /* If we're linking an executable, we can entirely omit the
1844 dynamic relocation if the symbol is local to this module. */
1848 {
1851 }
1852 else
1853 {
1857 {
1859 {
1864 }
1867 }
1869 _bfd_elf_section_offset
1879 }
1885 }
1888 {
1892 /* If the symbol is dynamic but binds locally, use
1893 section+offset. */
1896 {
1899 else
1904 else
1906 }
1908 /* If we didn't set up a TLS offset entry, but we're linking an
1909 executable and the symbol binds locally, we can use the
1910 module offset in the TLS descriptor in relaxations. */
1920 {
1921 /* *ABS*+addend is special for TLS relocations, use only the
1922 addend for the TLS offset, and take the module id as
1923 0. */
1927 ;
1928 /* For other TLS symbols that bind locally, add the section
1929 TLS offset to the addend. */
1946 ->output_offset
1952 /* We've used one of the reserved fixups, so discount it so
1953 that we can check at the end that we've used them
1954 all. */
1957 /* While at that, make sure the ret instruction makes to the
1958 right location in the PLT. We could do it only when we
1959 got to 0, but since the check at the end will only print
1960 a warning, make sure we have the ret in place in case the
1961 warning is missed. */
1965 }
1966 else
1967 {
1971 {
1973 {
1978 }
1981 }
1984 _bfd_elf_section_offset
1999 }
2005 }
2007 /* Generate code for the get-TLS-offset PLT entry. */
2009 {
2016 {
2020 /* sec may be NULL when referencing an undefweak symbol
2021 while linking a static executable. */
2023 {
2026 }
2027 else
2028 {
2031 else
2037 else
2039 }
2041 /* *ABS*+addend is special for TLS relocations, use only the
2042 addend for the TLS offset, and take the module id as
2043 0. */
2047 ;
2048 /* For other TLS symbols that bind locally, add the section
2049 TLS offset to the addend. */
2055 {
2056 /* setlos lo(ad), gr9 */
2058 0x92fc0000
2059 | (ad
2061 plt_code);
2063 }
2064 else
2065 {
2066 /* sethi.p hi(ad), gr9
2067 setlo lo(ad), gr9 */
2069 0x12f80000
2072 plt_code);
2075 0x92f40000
2076 | (ad
2078 plt_code);
2080 }
2081 /* ret */
2083 }
2085 {
2086 /* Figure out what kind of PLT entry we need, depending on the
2087 location of the TLS descriptor within the GOT. */
2090 {
2091 /* ldi @(gr15, tlsoff_entry), gr9 */
2095 plt_code);
2097 }
2098 else
2099 {
2102 {
2103 /* setlos lo(tlsoff_entry), gr8 */
2105 0x90fc0000
2108 plt_code);
2110 }
2111 else
2112 {
2113 /* sethi.p hi(tlsoff_entry), gr8
2114 setlo lo(tlsoff_entry), gr8 */
2116 0x10f80000
2119 plt_code);
2122 0x90f40000
2125 plt_code);
2127 }
2128 /* ld @(gr15,gr8),gr9 */
2131 }
2132 /* ret */
2134 }
2135 else
2136 {
2139 /* Figure out what kind of PLT entry we need, depending on the
2140 location of the TLS descriptor within the GOT. */
2143 {
2144 /* lddi @(gr15, tlsdesc_entry), gr8 */
2148 plt_code);
2150 }
2151 else
2152 {
2155 {
2156 /* setlos lo(tlsdesc_entry), gr8 */
2158 0x90fc0000
2161 plt_code);
2163 }
2164 else
2165 {
2166 /* sethi.p hi(tlsdesc_entry), gr8
2167 setlo lo(tlsdesc_entry), gr8 */
2169 0x10f80000
2172 plt_code);
2175 0x90f40000
2178 plt_code);
2180 }
2181 /* ldd @(gr15,gr8),gr8 */
2184 }
2185 /* jmpl @(gr8,gr0) */
2187 }
2188 }
2191 }
2193 /* Handle an FRV small data reloc. */
2195 static bfd_reloc_status_type
2203 bfd_vma value;
2204 {
2205 bfd_vma insn;
2206 bfd_vma gp;
2230 }
2232 /* Handle an FRV small data reloc. for the u12 field. */
2234 static bfd_reloc_status_type
2242 bfd_vma value;
2243 {
2244 bfd_vma insn;
2245 bfd_vma gp;
2247 bfd_vma mask;
2265 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2272 }
2274 /* Handle an FRV ELF HI16 reloc. */
2276 static bfd_reloc_status_type
2281 bfd_vma value;
2282 {
2283 bfd_vma insn;
2298 }
2299 static bfd_reloc_status_type
2304 bfd_vma value;
2305 {
2306 bfd_vma insn;
2320 }
2322 /* Perform the relocation for the CALL label24 instruction. */
2324 static bfd_reloc_status_type
2330 bfd_vma value;
2331 {
2332 bfd_vma insn;
2333 bfd_vma label6;
2334 bfd_vma label18;
2336 /* The format for the call instruction is:
2338 0 000000 0001111 000000000000000000
2339 label6 opcode label18
2341 The branch calculation is: pc + (4*label24)
2342 where label24 is the concatenation of label6 and label18. */
2344 /* Grab the instruction. */
2365 }
2367 static bfd_reloc_status_type
2375 bfd_vma value;
2376 {
2377 bfd_vma insn;
2378 bfd_vma gp;
2400 }
2402 static bfd_reloc_status_type
2410 bfd_vma value;
2411 {
2412 bfd_vma insn;
2413 bfd_vma gp;
2436 }
2441 bfd_reloc_code_real_type code;
2442 {
2444 {
2455 /* Fall through. */
2593 }
2596 }
2598 /* Set the howto pointer for an FRV ELF reloc. */
2600 static void
2605 {
2610 {
2622 }
2623 }
2625 /* Set the howto pointer for an FRV ELF REL reloc. */
2626 static void
2629 {
2634 {
2658 }
2659 }
2660 \f
2661 /* Perform a single relocation. By default we use the standard BFD
2662 routines, but a few relocs, we have to do them ourselves. */
2664 static bfd_reloc_status_type
2666 relocation)
2672 bfd_vma relocation;
2673 {
2677 }
2679 \f
2680 /* Relocate an FRV ELF section.
2682 The RELOCATE_SECTION function is called by the new ELF backend linker
2683 to handle the relocations for a section.
2685 The relocs are always passed as Rela structures; if the section
2686 actually uses Rel structures, the r_addend field will always be
2687 zero.
2689 This function is responsible for adjusting the section contents as
2690 necessary, and (if using Rela relocs and generating a relocatable
2691 output file) adjusting the reloc addend as necessary.
2693 This function does not have to worry about setting the reloc
2694 address or the reloc symbol index.
2696 LOCAL_SYMS is a pointer to the swapped in local symbols.
2698 LOCAL_SECTIONS is an array giving the section in the input file
2699 corresponding to the st_shndx field of each local symbol.
2701 The global hash table entry for the global symbols can be found
2702 via elf_sym_hashes (input_bfd).
2704 When generating relocatable output, this function must handle
2705 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2706 going to be the section symbol corresponding to the output
2707 section, which means that the addend must be adjusted
2708 accordingly. */
2710 static bfd_boolean
2721 {
2744 else
2750 else
2756 else
2761 else
2765 {
2771 bfd_vma relocation;
2772 bfd_reloc_status_type r;
2785 /* This is a final link. */
2793 {
2798 name = bfd_elf_string_from_elf_section
2801 }
2802 else
2803 {
2814 {
2816 r_type != R_FRV_TLSMOFF
2818 {
2821 }
2822 else
2823 {
2828 }
2829 }
2831 {
2833 }
2837 else
2838 {
2846 }
2848 }
2851 {
2891 else
2892 /* In order to find the entry we created before, we must
2893 use the original addend, not the one that may have been
2894 modified by _bfd_elf_rela_local_sym(). */
2904 {
2909 }
2914 non_fdpic:
2917 {
2922 }
2924 }
2927 {
2950 }
2952 /* Try to apply TLS relaxations. */
2955 {
2957 #define LOCAL_EXEC_P(info, picrel) \
2958 ((info)->executable \
2959 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2960 #define INITIAL_EXEC_P(info, picrel) \
2961 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2962 && (picrel)->tlsoff_entry)
2964 #define IN_RANGE_FOR_OFST12_P(value) \
2965 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2966 #define IN_RANGE_FOR_SETLOS_P(value) \
2967 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2968 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2969 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2971 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2972 (LOCAL_EXEC_P ((info), (picrel)) \
2973 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2974 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2975 (INITIAL_EXEC_P ((info), (picrel)) \
2976 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2978 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2979 (LOCAL_EXEC_P ((info), (picrel)))
2980 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2981 (INITIAL_EXEC_P ((info), (picrel)))
2983 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2984 (LOCAL_EXEC_P ((info), (picrel)) \
2985 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2990 /* Is this a call instruction? */
2992 {
2998 }
3002 {
3003 /* Replace the call instruction (except the packing bit)
3004 with setlos #tlsmofflo(symbol+offset), gr9. */
3012 }
3015 {
3016 /* Replace the call instruction (except the packing bit)
3017 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
3025 }
3032 /* Is this an lddi instruction? */
3034 {
3040 }
3045 info))
3046 {
3047 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3048 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3049 Preserve the packing bit. */
3059 }
3063 {
3064 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3065 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3066 Preserve the packing bit. */
3076 }
3079 {
3080 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3081 with ldi @(grB, #gottlsoff12(symbol+offset),
3082 gr<C+1>. Preserve the packing bit. If gottlsoff12
3083 overflows, we'll error out, but that's sort-of ok,
3084 since we'd started with gottlsdesc12, that's actually
3085 more demanding. Compiling with -fPIE instead of
3086 -fpie would fix it; linking with --relax should fix
3087 it as well. */
3096 }
3103 /* Is this a sethi instruction? */
3105 {
3111 }
3117 {
3118 /* Replace sethi with a nop. Preserve the packing bit. */
3123 /* Nothing to relocate. */
3125 }
3128 {
3129 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3133 }
3140 /* Is this a setlo or setlos instruction? */
3142 {
3149 }
3155 {
3156 /* Replace setlo/setlos with a nop. Preserve the
3157 packing bit. */
3162 /* Nothing to relocate. */
3164 }
3167 {
3168 /* If the corresponding sethi (if it exists) decayed
3169 to a nop, make sure this becomes (or already is) a
3170 setlos, not setlo. */
3172 {
3175 }
3177 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3181 }
3188 /* Is this an ldd instruction? */
3190 {
3196 }
3201 info))
3202 {
3203 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3204 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3205 Preserve the packing bit. */
3215 }
3219 {
3220 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3221 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3222 Preserve the packing bit. */
3232 }
3236 {
3237 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3238 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3239 Preserve the packing bit. */
3249 }
3252 {
3253 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3254 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3255 Preserve the packing bit. */
3261 /* #tlsoff(symbol+offset) is just a relaxation
3262 annotation, so there's nothing left to
3263 relocate. */
3265 }
3272 /* Is this a calll or callil instruction? */
3274 {
3281 }
3286 info))
3287 {
3288 /* Replace calll with a nop. Preserve the packing bit. */
3293 /* Nothing to relocate. */
3295 }
3299 {
3300 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3301 Preserve the packing bit. */
3309 }
3312 {
3313 /* Replace calll with a nop. Preserve the packing bit. */
3318 /* Nothing to relocate. */
3320 }
3327 /* Is this an ldi instruction? */
3329 {
3335 }
3339 {
3340 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3341 with setlos #tlsmofflo(symbol+offset), grC.
3342 Preserve the packing bit. */
3350 }
3357 /* Is this a sethi instruction? */
3359 {
3365 }
3371 {
3372 /* Replace sethi with a nop. Preserve the packing bit. */
3377 /* Nothing to relocate. */
3379 }
3386 /* Is this a setlo or setlos instruction? */
3388 {
3395 }
3401 {
3402 /* Replace setlo/setlos with a nop. Preserve the
3403 packing bit. */
3408 /* Nothing to relocate. */
3410 }
3417 /* Is this an ld instruction? */
3419 {
3425 }
3429 {
3430 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3431 with setlos #tlsmofflo(symbol+offset), grC.
3432 Preserve the packing bit. */
3440 }
3444 {
3445 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3446 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3447 Preserve the packing bit. */
3455 }
3462 /* Is this a sethi instruction? */
3464 {
3470 }
3473 info))
3474 {
3475 /* Replace sethi with a nop. Preserve the packing bit. */
3480 /* Nothing to relocate. */
3482 }
3489 /* Is this a setlo or setlos instruction? */
3491 {
3498 }
3501 info))
3502 /* If the corresponding sethi (if it exists) decayed
3503 to a nop, make sure this becomes (or already is) a
3504 setlos, not setlo. */
3505 {
3508 }
3512 /*
3513 There's nothing to relax in these:
3514 R_FRV_TLSDESC_VALUE
3515 R_FRV_TLSOFF
3516 R_FRV_TLSMOFF12
3517 R_FRV_TLSMOFFHI
3518 R_FRV_TLSMOFFLO
3519 R_FRV_TLSMOFF
3520 */
3524 }
3527 {
3533 {
3538 }
3539 /* We don't want to warn on calls to undefined weak symbols,
3540 as calls to them must be protected by non-NULL tests
3541 anyway, and unprotected calls would invoke undefined
3542 behavior. */
3546 else
3586 {
3592 {
3593 /* If the symbol is dynamic and there may be dynamic
3594 symbol resolution because we are or are linked with a
3595 shared library, emit a FUNCDESC relocation such that
3596 the dynamic linker will allocate the function
3597 descriptor. If the symbol needs a non-local function
3598 descriptor but binds locally (e.g., its visibility is
3599 protected, emit a dynamic relocation decayed to
3600 section+offset. */
3604 {
3609 }
3611 {
3613 {
3618 }
3620 }
3621 else
3622 {
3623 /* Otherwise, we know we have a private function
3624 descriptor, so reference it directly. */
3632 }
3634 /* If there is room for dynamic symbol resolution, emit
3635 the dynamic relocation. However, if we're linking an
3636 executable at a fixed location, we won't have emitted a
3637 dynamic symbol entry for the got section, so idx will
3638 be zero, which means we can and should compute the
3639 address of the private descriptor ourselves. */
3642 {
3647 {
3649 input_section
3651 {
3657 }
3659 frvfdpic_gotfixup_section
3661 _bfd_elf_section_offset
3664 + input_section
3667 picrel);
3668 }
3669 }
3673 {
3675 input_section
3677 {
3683 }
3686 _bfd_elf_section_offset
3689 + input_section
3693 }
3694 else
3696 }
3698 /* We want the addend in-place because dynamic
3699 relocations are REL. Setting relocation to it should
3700 arrange for it to be installed. */
3702 }
3708 {
3711 }
3712 /* Fall through. */
3714 {
3718 /* If the symbol is dynamic but binds locally, use
3719 section+offset. */
3721 {
3723 {
3728 }
3730 }
3731 else
3732 {
3735 else
3743 else
3745 }
3747 /* If we're linking an executable at a fixed address, we
3748 can omit the dynamic relocation as long as the symbol
3749 is defined in the current link unit (which is implied
3750 by its output section not being NULL). */
3753 {
3760 {
3762 input_section
3764 {
3770 }
3772 {
3774 frvfdpic_gotfixup_section
3776 _bfd_elf_section_offset
3779 + input_section
3782 picrel);
3784 _frvfdpic_add_rofixup
3787 _bfd_elf_section_offset
3792 }
3793 }
3794 }
3795 else
3796 {
3800 {
3802 input_section
3804 {
3810 }
3813 _bfd_elf_section_offset
3816 + input_section
3820 }
3823 /* We want the addend in-place because dynamic
3824 relocations are REL. Setting relocation to it
3825 should arrange for it to be installed. */
3827 }
3830 {
3831 /* If we've omitted the dynamic relocation, just emit
3832 the fixed addresses of the symbol and of the local
3833 GOT base offset. */
3841 else
3842 /* A function descriptor used for lazy or local
3843 resolving is initialized such that its high word
3844 contains the output section index in which the
3845 PLT entries are located, and the low word
3846 contains the offset of the lazy PLT entry entry
3847 point into that section. */
3852 sec
3855 }
3856 }
3903 {
3906 }
3908 {
3912 }
3913 else
3932 /* These shouldn't be present in input object files. */
3939 /* These are just annotations for relaxation, nothing to do
3940 here. */
3949 }
3952 {
3953 /* If you take this out, remove the #error from fdpic-static-6.d
3954 in the ld testsuite. */
3955 /* This helps catch problems in GCC while we can't do more
3956 than static linking. The idea is to test whether the
3957 input file basename is crt0.o only once. */
3959 silence_segment_error =
3968 /* We don't want duplicate errors for undefined
3969 symbols. */
3972 {
3978 else
3983 }
3987 }
3990 {
3993 /* We need the addend to be applied before we shift the
3994 value right. */
3996 /* Fall through. */
4003 /* Fall through. */
4017 }
4020 {
4024 /* Fall through. */
4026 /* When referencing a GOT entry, a function descriptor or a
4027 PLT, we don't want the addend to apply to the reference,
4028 but rather to the referenced symbol. The actual entry
4029 will have already been created taking the addend into
4030 account, so cancel it out here. */
4047 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
4048 here, since we do want to apply the addend to the others.
4049 Note that we've applied the addend to GOTOFFHI before we
4050 shifted it right. */
4058 }
4090 else
4095 {
4099 {
4126 }
4129 {
4134 }
4138 }
4139 }
4142 }
4143 \f
4144 /* Return the section that should be marked against GC for a given
4145 relocation. */
4154 {
4156 {
4158 {
4165 {
4175 }
4176 }
4177 }
4178 else
4182 }
4184 /* Update the got entry reference counts for the section being removed. */
4186 static bfd_boolean
4192 {
4194 }
4196 \f
4197 /* Hook called by the linker routine which adds symbols from an object
4198 file. We use it to put .comm items in .scomm, and not .comm. */
4200 static bfd_boolean
4209 {
4213 {
4214 /* Common symbols less than or equal to -G nn bytes are
4215 automatically put into .sbss. */
4220 {
4222 (SEC_ALLOC
4223 | SEC_IS_COMMON
4227 }
4231 }
4234 }
4236 /* We need dynamic symbols for every section, since segments can
4237 relocate independently. */
4238 static bfd_boolean
4241 ATTRIBUTE_UNUSED,
4243 {
4245 {
4248 /* If sh_type is yet undecided, assume it could be
4249 SHT_PROGBITS/SHT_NOBITS. */
4253 /* There shouldn't be section relative relocations
4254 against any other section. */
4257 }
4258 }
4260 /* Create a .got section, as well as its additional info field. This
4261 is almost entirely copied from
4262 elflink.c:_bfd_elf_create_got_section(). */
4264 static bfd_boolean
4266 {
4275 /* This function may be called more than once. */
4280 /* Machine specific: although pointers are 32-bits wide, we want the
4281 GOT to be aligned to a 64-bit boundary, such that function
4282 descriptors in it can be accessed with 64-bit loads and
4283 stores. */
4296 {
4301 }
4304 {
4305 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4306 (or .got.plt) section. We don't do this in the linker script
4307 because we don't want to define the symbol if we are not creating
4308 a global offset table. */
4314 /* Machine-specific: we want the symbol for executables as
4315 well. */
4318 }
4320 /* The first bit of the global offset table is the header. */
4323 /* This is the machine-specific part. Create and initialize section
4324 data for the got. */
4326 {
4329 frvfdpic_relocs_info_hash,
4330 frvfdpic_relocs_info_eq,
4343 /* Machine-specific. */
4353 }
4354 else
4355 {
4358 }
4360 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4361 turns out that we're linking with a different linker script, the
4362 linker script will override it. */
4373 /* Machine-specific: we want the symbol for executables as well. */
4380 /* FDPIC supports Thread Local Storage, and this may require a
4381 procedure linkage table for TLS PLT entries. */
4383 /* This is mostly copied from
4384 elflink.c:_bfd_elf_create_dynamic_sections(). */
4397 /* FRV-specific: remember it. */
4400 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4401 .plt section. */
4403 {
4409 }
4411 /* FRV-specific: we want rel relocations for the plt. */
4417 /* FRV-specific: remember it. */
4421 }
4423 /* Make sure the got and plt sections exist, and that our pointers in
4424 the link hash table point to them. */
4426 static bfd_boolean
4428 {
4429 /* This is mostly copied from
4430 elflink.c:_bfd_elf_create_dynamic_sections(). */
4431 flagword flags;
4438 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4439 .rel[a].bss sections. */
4441 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4442 way. */
4446 /* FRV-specific: make sure we created everything we wanted. */
4453 {
4454 /* The .dynbss section is a place to put symbols which are defined
4455 by dynamic objects, are referenced by regular objects, and are
4456 not functions. We must allocate space for them in the process
4457 image and use a R_*_COPY reloc to tell the dynamic linker to
4458 initialize them at run time. The linker script puts the .dynbss
4459 section into the .bss section of the final image. */
4465 /* The .rel[a].bss section holds copy relocs. This section is not
4466 normally needed. We need to create it here, though, so that the
4467 linker will map it to an output section. We can't just create it
4468 only if we need it, because we will not know whether we need it
4469 until we have seen all the input files, and the first time the
4470 main linker code calls BFD after examining all the input files
4471 (size_dynamic_sections) the input sections have already been
4472 mapped to the output sections. If the section turns out not to
4473 be needed, we can discard it later. We will never need this
4474 section when generating a shared object, since they do not use
4475 copy relocs. */
4477 {
4485 }
4486 }
4489 }
4491 /* Compute the total GOT and PLT size required by each symbol in each
4492 range. Symbols may require up to 4 words in the GOT: an entry
4493 pointing to the symbol, an entry pointing to its function
4494 descriptor, and a private function descriptors taking two
4495 words. */
4497 static void
4500 {
4501 /* Allocate space for a GOT entry pointing to the symbol. */
4508 else
4512 /* Allocate space for a GOT entry pointing to the function
4513 descriptor. */
4520 else
4524 /* Decide whether we need a PLT entry, a function descriptor in the
4525 GOT, and a lazy PLT entry for this symbol. */
4539 /* Allocate space for a function descriptor. */
4548 else
4554 }
4556 /* Compute the total GOT size required by each TLS symbol in each
4557 range. Symbols may require up to 5 words in the GOT: an entry
4558 holding the TLS offset for the symbol, and an entry with a full TLS
4559 descriptor taking 4 words. */
4561 static void
4564 bfd_boolean subtract)
4565 {
4568 /* Allocate space for a GOT entry with the TLS offset of the
4569 symbol. */
4576 else
4580 /* If there's any TLSOFF relocation, mark the output file as not
4581 suitable for dlopening. This mark will remain even if we relax
4582 all such relocations, but this is not a problem, since we'll only
4583 do so for executables, and we definitely don't want anyone
4584 dlopening executables. */
4588 /* Allocate space for a TLS descriptor. */
4597 else
4600 }
4602 /* Compute the number of dynamic relocations and fixups that a symbol
4603 requires, and add (or subtract) from the grand and per-symbol
4604 totals. */
4606 static void
4609 bfd_boolean subtract)
4610 {
4614 {
4618 /* In the executable, TLS relocations to symbols that bind
4619 locally (including those that resolve to global TLS offsets)
4620 are resolved immediately, without any need for fixups or
4621 dynamic relocations. In shared libraries, however, we must
4622 emit dynamic relocations even for local symbols, because we
4623 don't know the module id the library is going to get at
4624 run-time, nor its TLS base offset. */
4629 }
4630 else
4631 {
4633 {
4639 }
4640 else
4641 {
4644 }
4648 {
4652 }
4653 else
4655 }
4658 {
4662 }
4669 }
4671 /* Look for opportunities to relax TLS relocations. We can assume
4672 we're linking the main executable or a static-tls library, since
4673 otherwise we wouldn't have got here. When relaxing, we have to
4674 first undo any previous accounting of TLS uses of fixups, dynamic
4675 relocations, GOT and PLT entries. */
4677 static void
4680 bfd_boolean relaxing)
4681 {
4688 {
4690 {
4694 }
4696 /* When linking an executable, we can always decay GOTTLSDESC to
4697 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4698 When linking a static-tls shared library, using TLSMOFF is
4699 not an option, but we can still use GOTTLSOFF. When decaying
4700 to GOTTLSOFF, we must keep the GOT entry in range. We know
4701 it has to fit because we'll be trading the 4 words of hte TLS
4702 descriptor for a single word in the same range. */
4706 {
4710 }
4713 }
4715 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4716 main executable. We have to check whether the symbol's TLSOFF is
4717 in range for a setlos. For symbols with a hash entry, we can
4718 determine exactly what to do; for others locals, we don't have
4719 addresses handy, so we use the size of the TLS section as an
4720 approximation. If we get it wrong, we'll retain a GOT entry
4721 holding the TLS offset (without dynamic relocations or fixups),
4722 but we'll still optimize away the loads from it. Since TLS sizes
4723 are generally very small, it's probably not worth attempting to
4724 do better than this. */
4730 /* The above may hold for an undefweak TLS symbol, so make
4731 sure we don't have this case before accessing def.value
4732 and def.section. */
4744 {
4746 {
4750 }
4754 }
4756 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4757 have a #gottlsoff12 relocation for this entry, or if we can fit
4758 one more in the 12-bit (and 16-bit) ranges. */
4761 || (relaxing
4766 {
4768 {
4772 }
4776 }
4779 {
4782 }
4785 }
4787 /* Compute the total GOT and PLT size required by each symbol in each range. *
4788 Symbols may require up to 4 words in the GOT: an entry pointing to
4789 the symbol, an entry pointing to its function descriptor, and a
4790 private function descriptors taking two words. */
4792 static int
4794 {
4802 else
4803 {
4806 }
4809 }
4811 /* Determine the positive and negative ranges to be used by each
4812 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4813 double-word boundary, are the minimum (negative) and maximum
4814 (positive) GOT offsets already used by previous ranges, except for
4815 an ODD entry that may have been left behind. GOT and FD indicate
4816 the size of GOT entries and function descriptors that must be
4817 placed within the range from -WRAP to WRAP. If there's room left,
4818 up to FDPLT bytes should be reserved for additional function
4819 descriptors. */
4823 bfd_signed_vma fdcur,
4824 bfd_signed_vma odd,
4825 bfd_signed_vma cur,
4826 bfd_vma got,
4827 bfd_vma fd,
4828 bfd_vma fdplt,
4829 bfd_vma tlsd,
4830 bfd_vma tlsdplt,
4831 bfd_vma wrap)
4832 {
4836 /* Start at the given initial points. */
4840 /* If we had an incoming odd word and we have any got entries that
4841 are going to use it, consume it, otherwise leave gad->odd at
4842 zero. We might force gad->odd to zero and return the incoming
4843 odd such that it is used by the next range, but then GOT entries
4844 might appear to be out of order and we wouldn't be able to
4845 shorten the GOT by one word if it turns out to end with an
4846 unpaired GOT entry. */
4848 {
4852 }
4853 else
4856 /* If we're left with an unpaired GOT entry, compute its location
4857 such that we can return it. Otherwise, if got doesn't require an
4858 odd number of words here, either odd was already zero in the
4859 block above, or it was set to zero because got was non-zero, or
4860 got was already zero. In the latter case, we want the value of
4861 odd to carry over to the return statement, so we don't want to
4862 reset odd unless the condition below is true. */
4864 {
4867 }
4869 /* Compute the tentative boundaries of this range. */
4874 /* If function descriptors took too much space, wrap some of them
4875 around. */
4877 {
4880 }
4882 /* If GOT entries took too much space, wrap some of them around.
4883 This may well cause gad->min to become lower than wrapmin. This
4884 will cause a relocation overflow later on, so we don't have to
4885 report it here . */
4887 {
4890 }
4892 /* Add TLS descriptors. */
4897 /* If TLS descriptors took too much space, wrap an integral number
4898 of them around. */
4900 {
4908 }
4910 /* If there is space left and we have function descriptors
4911 referenced in PLT entries that could take advantage of shorter
4912 offsets, place them now. */
4914 {
4915 bfd_vma fds;
4919 else
4926 }
4928 /* If there is more space left, try to place some more function
4929 descriptors for PLT entries. */
4931 {
4932 bfd_vma fds;
4936 else
4943 }
4945 /* If there is space left and we have TLS descriptors referenced in
4946 PLT entries that could take advantage of shorter offsets, place
4947 them now. */
4949 {
4950 bfd_vma tlsds;
4954 else
4960 }
4962 /* If there is more space left, try to place some more TLS
4963 descriptors for PLT entries. Although we could try to fit an
4964 additional TLS descriptor with half of it just before before the
4965 wrap point and another right past the wrap point, this might
4966 cause us to run out of space for the next region, so don't do
4967 it. */
4969 {
4970 bfd_vma tlsds;
4974 else
4980 }
4982 /* If odd was initially computed as an offset past the wrap point,
4983 wrap it around. */
4987 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4988 before returning, so do it here too. This guarantees that,
4989 should cur and fdcur meet at the wrap point, they'll both be
4990 equal to min. */
4994 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
5000 }
5002 /* Compute the location of the next GOT entry, given the allocation
5003 data for a range. */
5007 {
5008 bfd_signed_vma ret;
5011 {
5012 /* If there was an odd word left behind, use it. */
5015 }
5016 else
5017 {
5018 /* Otherwise, use the word pointed to by cur, reserve the next
5019 as an odd word, and skip to the next pair of words, possibly
5020 wrapping around. */
5026 }
5029 }
5031 /* Compute the location of the next function descriptor entry in the
5032 GOT, given the allocation data for a range. */
5036 {
5037 /* If we're at the bottom, wrap around, and only then allocate the
5038 next pair of words. */
5042 }
5044 /* Compute the location of the next TLS descriptor entry in the GOT,
5045 given the allocation data for a range. */
5048 {
5049 bfd_signed_vma ret;
5055 /* If we're at the top of the region, wrap around to the bottom. */
5060 }
5062 /* Assign GOT offsets for every GOT entry and function descriptor.
5063 Doing everything in a single pass is tricky. */
5065 static int
5067 {
5088 {
5091 }
5095 {
5098 }
5100 {
5103 }
5117 {
5120 }
5124 {
5127 }
5129 {
5132 }
5137 }
5139 /* Assign GOT offsets to private function descriptors used by PLT
5140 entries (or referenced by 32-bit offsets), as well as PLT entries
5141 and lazy PLT entries. */
5143 static int
5145 {
5153 {
5156 /* We use the section's raw size to mark the location of the
5157 next PLT entry. */
5160 /* Figure out the length of this PLT entry based on the
5161 addressing mode we need to reach the function descriptor. */
5169 else
5173 }
5176 {
5179 /* If this entry is the one that gets the resolver stub, account
5180 for the additional instruction. */
5184 }
5187 {
5190 entry->tlsplt_entry
5196 {
5198 /* FIXME: here we use the size of the TLS section
5199 as an upper bound for the value of the TLS
5200 symbol, because we may not know the exact value
5201 yet. If we get it wrong, we'll just waste a
5202 word in the PLT, and we should never get even
5203 close to 32 KiB of TLS anyway. */
5208 else
5210 }
5212 {
5219 else
5221 }
5222 else
5223 {
5232 else
5234 }
5237 }
5240 }
5242 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5243 _frvfdpic_assign_plt_entries. */
5245 static int
5247 {
5260 }
5262 /* Follow indirect and warning hash entries so that each got entry
5263 points to the final symbol definition. P must point to a pointer
5264 to the hash table we're traversing. Since this traversal may
5265 modify the hash table, we set this pointer to NULL to indicate
5266 we've made a potentially-destructive change to the hash table, so
5267 the traversal must be restarted. */
5268 static int
5270 {
5275 {
5287 NO_INSERT);
5290 {
5291 /* Merge the two entries. */
5295 }
5299 /* If we can't find this entry with the new bfd hash, re-insert
5300 it, and get the traversal restarted. */
5302 {
5307 /* Abort the traversal, since the whole table may have
5308 moved, and leave it up to the parent to restart the
5309 process. */
5312 }
5313 }
5316 }
5318 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5319 section and the rofixup section. Assign locations for GOT and PLT
5320 entries. */
5322 static bfd_boolean
5325 {
5326 bfd_signed_vma odd;
5335 /* Compute the total size taken by entries in the 12-bit and 16-bit
5336 ranges, to tell how many PLT function descriptors we can bring
5337 into the 12-bit range without causing the 16-bit range to
5338 overflow. */
5344 else
5347 {
5350 }
5351 else
5356 /* Determine the ranges of GOT offsets that we can use for each
5357 range of addressing modes. */
5360 odd,
5364 limit,
5366 tlslimit,
5370 odd,
5382 odd,
5395 /* Now assign (most) GOT offsets. */
5397 gpinfop);
5401 /* If an odd word is the last word of the GOT, we don't need this
5402 word to be part of the GOT. */
5408 {
5411 }
5412 /* This will be non-NULL during relaxation. The assumption is that
5413 the size of one of these sections will never grow, only shrink,
5414 so we can use the larger buffer we allocated before. */
5416 {
5422 }
5425 /* Subtract the number of lzplt entries, since those will generate
5426 relocations in the pltrel section. */
5430 else
5435 {
5441 }
5447 {
5453 }
5456 {
5463 {
5469 }
5470 }
5472 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5473 such that there's room for the additional instruction needed to
5474 call the resolver. Since _frvfdpic_assign_got_entries didn't
5475 account for them, our block size is 4 bytes smaller than the real
5476 block size. */
5478 {
5482 }
5484 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5485 actually assign lazy PLT entries addresses. */
5488 /* Save information that we're going to need to generate GOT and PLT
5489 entries. */
5500 /* Allocate a ret statement at plt_initial_offset, to be used by
5501 locally-resolved TLS descriptors. */
5506 gpinfop);
5508 /* Allocate the PLT section contents only after
5509 _frvfdpic_assign_plt_entries has a chance to add the size of the
5510 non-lazy PLT entries. */
5512 {
5516 {
5522 }
5523 }
5526 }
5528 /* Set the sizes of the dynamic sections. */
5530 static bfd_boolean
5533 {
5542 {
5543 /* Set the contents of the .interp section to the interpreter. */
5545 {
5550 }
5551 }
5557 {
5564 }
5569 /* Allocate space to save the summary information, we're going to
5570 use it if we're doing relaxations. */
5577 {
5594 }
5597 }
5599 static bfd_boolean
5602 {
5604 {
5608 /* Force a PT_GNU_STACK segment to be created. */
5612 /* Define __stacksize if it's not defined yet. */
5618 {
5631 /* This one must NOT be hidden. */
5632 }
5634 /* Create a stack section, and set its alignment. */
5640 }
5643 }
5645 /* Look for opportunities to relax TLS relocations. We can assume
5646 we're linking the main executable or a static-tls library, since
5647 otherwise we wouldn't have got here. */
5649 static int
5651 {
5658 }
5660 static bfd_boolean
5663 {
5666 /* If we return early, we didn't change anything. */
5669 /* We'll do our thing when requested to relax the GOT section. */
5673 /* We can only relax when linking the main executable or a library
5674 that can't be dlopened. */
5678 /* If there isn't a TLS section for this binary, we can't do
5679 anything about its TLS relocations (it probably doesn't have
5680 any. */
5687 /* Now look for opportunities to relax, adjusting the GOT usage
5688 as needed. */
5690 _frvfdpic_relax_got_plt_entries,
5693 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5696 {
5697 /* Clear GOT and PLT assignments. */
5699 _frvfdpic_reset_got_plt_entries,
5700 NULL);
5702 /* The owner of the TLS section is the output bfd. There should
5703 be a better way to get to it. */
5708 /* Repeat until we don't make any further changes. We could fail to
5709 introduce changes in a round if, for example, the 12-bit range is
5710 full, but we later release some space by getting rid of TLS
5711 descriptors in it. We have to repeat the whole process because
5712 we might have changed the size of a section processed before this
5713 one. */
5715 }
5718 }
5720 static bfd_boolean
5723 {
5726 /* objcopy and strip preserve what's already there using
5727 elf32_frvfdpic_copy_private_bfd_data (). */
5736 {
5741 {
5742 /* Obtain the pointer to the __stacksize symbol. */
5750 /* Set the section size from the symbol value. We
5751 intentionally ignore the symbol section. */
5754 else
5757 /* Add the stack section to the PT_GNU_STACK segment,
5758 such that its size and alignment requirements make it
5759 to the segment. */
5762 }
5763 }
5766 }
5768 /* Fill in code and data in dynamic sections. */
5770 static bfd_boolean
5773 {
5774 /* Nothing to be done for non-FDPIC. */
5776 }
5778 static bfd_boolean
5781 {
5788 {
5790 }
5792 {
5798 {
5810 {
5811 error:
5815 }
5822 {
5823 bfd_vma value =
5832 }
5833 }
5834 }
5836 {
5840 }
5844 {
5856 {
5857 Elf_Internal_Dyn dyn;
5862 {
5884 }
5885 }
5886 }
5889 }
5891 /* Adjust a symbol defined by a dynamic object and referenced by a
5892 regular object. */
5894 static bfd_boolean
5895 elf32_frvfdpic_adjust_dynamic_symbol
5898 {
5903 /* Make sure we know what is going on here. */
5910 /* If this is a weak symbol, and there is a real definition, the
5911 processor independent code will have arranged for us to see the
5912 real definition first, and we can just use the same value. */
5914 {
5919 }
5922 }
5924 /* Perform any actions needed for dynamic symbols. */
5926 static bfd_boolean
5927 elf32_frvfdpic_finish_dynamic_symbol
5932 {
5934 }
5936 /* Decide whether to attempt to turn absptr or lsda encodings in
5937 shared libraries into pcrel within the given input section. */
5939 static bfd_boolean
5940 frvfdpic_elf_use_relative_eh_frame
5944 {
5945 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
5947 }
5949 /* Adjust the contents of an eh_frame_hdr section before they're output. */
5951 static bfd_byte
5957 {
5969 == (_frvfdpic_osec_to_segment
5978 }
5980 /* Look through the relocs for a section during the first phase.
5982 Besides handling virtual table relocs for gc, we have to deal with
5983 all sorts of PIC-related relocations. We describe below the
5984 general plan on how to handle such relocations, even though we only
5985 collect information at this point, storing them in hash tables for
5986 perusal of later passes.
5988 32 relocations are propagated to the linker output when creating
5989 position-independent output. LO16 and HI16 relocations are not
5990 supposed to be encountered in this case.
5992 LABEL16 should always be resolvable by the linker, since it's only
5993 used by branches.
5995 LABEL24, on the other hand, is used by calls. If it turns out that
5996 the target of a call is a dynamic symbol, a PLT entry must be
5997 created for it, which triggers the creation of a private function
5998 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
6000 GPREL relocations require the referenced symbol to be in the same
6001 segment as _gp, but this can only be checked later.
6003 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
6004 exist. LABEL24 might as well, since it may require a PLT entry,
6005 that will require a got.
6007 Non-FUNCDESC GOT relocations require a GOT entry to be created
6008 regardless of whether the symbol is dynamic. However, since a
6009 global symbol that turns out to not be exported may have the same
6010 address of a non-dynamic symbol, we don't assign GOT entries at
6011 this point, such that we can share them in this case. A relocation
6012 for the GOT entry always has to be created, be it to offset a
6013 private symbol by the section load address, be it to get the symbol
6014 resolved dynamically.
6016 FUNCDESC GOT relocations require a GOT entry to be created, and
6017 handled as if a FUNCDESC relocation was applied to the GOT entry in
6018 an object file.
6020 FUNCDESC relocations referencing a symbol that turns out to NOT be
6021 dynamic cause a private function descriptor to be created. The
6022 FUNCDESC relocation then decays to a 32 relocation that points at
6023 the private descriptor. If the symbol is dynamic, the FUNCDESC
6024 relocation is propagated to the linker output, such that the
6025 dynamic linker creates the canonical descriptor, pointing to the
6026 dynamically-resolved definition of the function.
6028 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
6029 symbols that are assigned to the same segment as the GOT, but we
6030 can only check this later, after we know the complete set of
6031 symbols defined and/or exported.
6033 FUNCDESC GOTOFF relocations require a function descriptor to be
6034 created and, unless lazy binding is disabled or the symbol is not
6035 dynamic, a lazy PLT entry. Since we can't tell at this point
6036 whether a symbol is going to be dynamic, we have to decide later
6037 whether to create a lazy PLT entry or bind the descriptor directly
6038 to the private function.
6040 FUNCDESC_VALUE relocations are not supposed to be present in object
6041 files, but they may very well be simply propagated to the linker
6042 output, since they have no side effect.
6045 A function descriptor always requires a FUNCDESC_VALUE relocation.
6046 Whether it's in .plt.rel or not depends on whether lazy binding is
6047 enabled and on whether the referenced symbol is dynamic.
6049 The existence of a lazy PLT requires the resolverStub lazy PLT
6050 entry to be present.
6053 As for assignment of GOT, PLT and lazy PLT entries, and private
6054 descriptors, we might do them all sequentially, but we can do
6055 better than that. For example, we can place GOT entries and
6056 private function descriptors referenced using 12-bit operands
6057 closer to the PIC register value, such that these relocations don't
6058 overflow. Those that are only referenced with LO16 relocations
6059 could come next, but we may as well place PLT-required function
6060 descriptors in the 12-bit range to make them shorter. Symbols
6061 referenced with LO16/HI16 may come next, but we may place
6062 additional function descriptors in the 16-bit range if we can
6063 reliably tell that we've already placed entries that are ever
6064 referenced with only LO16. PLT entries are therefore generated as
6065 small as possible, while not introducing relocation overflows in
6066 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6067 generated before or after PLT entries, but not intermingled with
6068 them, such that we can have more lazy PLT entries in range for a
6069 branch to the resolverStub. The resolverStub should be emitted at
6070 the most distant location from the first lazy PLT entry such that
6071 it's still in range for a branch, or closer, if there isn't a need
6072 for so many lazy PLT entries. Additional lazy PLT entries may be
6073 emitted after the resolverStub, as long as branches are still in
6074 range. If the branch goes out of range, longer lazy PLT entries
6075 are emitted.
6077 We could further optimize PLT and lazy PLT entries by giving them
6078 priority in assignment to closer-to-gr17 locations depending on the
6079 number of occurrences of references to them (assuming a function
6080 that's called more often is more important for performance, so its
6081 PLT entry should be faster), or taking hints from the compiler.
6082 Given infinite time and money... :-) */
6084 static bfd_boolean
6090 {
6110 {
6117 else
6118 {
6123 }
6126 {
6156 /* Fall through. */
6164 {
6168 }
6170 {
6173 }
6175 {
6178 {
6185 }
6186 picrel
6190 }
6191 else
6202 }
6205 {
6215 /* Fall through. */
6303 /* This relocation describes the C++ object vtable hierarchy.
6304 Reconstruct it for later use during GC. */
6310 /* This relocation describes which C++ vtable entries are actually
6311 used. Record for later use during GC. */
6331 bad_reloc:
6336 }
6337 }
6340 }
6342 \f
6343 /* Return the machine subcode from the ELF e_flags header. */
6345 static int
6348 {
6350 {
6360 }
6363 }
6365 /* Set the right machine number for a FRV ELF file. */
6367 static bfd_boolean
6370 {
6374 }
6375 \f
6376 /* Function to set the ELF flag bits. */
6378 static bfd_boolean
6381 flagword flags;
6382 {
6386 }
6388 /* Copy backend specific data from one object module to another. */
6390 static bfd_boolean
6394 {
6405 }
6407 /* Return true if the architecture described by elf header flag
6408 EXTENSION is an extension of the architecture described by BASE. */
6410 static bfd_boolean
6412 {
6416 /* CPU_GENERIC code can be merged with code for a specific
6417 architecture, in which case the result is marked as being
6418 for the specific architecture. Everything is therefore
6419 an extension of CPU_GENERIC. */
6432 }
6434 static bfd_boolean
6436 {
6450 /* Copy the stack size. */
6453 {
6458 {
6461 /* Rewrite the phdrs, since we're only called after they
6462 were first written. */
6470 }
6473 }
6476 }
6478 /* Merge backend specific data from an object file to the output
6479 object file when linking. */
6481 static bfd_boolean
6485 {
6499 #ifdef DEBUG
6503 #endif
6506 {
6509 }
6512 ;
6515 {
6516 /* Warn if different # of gprs are used. Note, 0 means nothing is
6517 said about the size of gprs. */
6521 ;
6524 ;
6529 else
6530 {
6532 {
6536 }
6539 {
6543 }
6544 }
6546 /* Warn if different # of fprs are used. Note, 0 means nothing is
6547 said about the size of fprs. */
6551 ;
6554 ;
6559 else
6560 {
6562 {
6567 }
6570 {
6575 }
6576 }
6578 /* Warn if different dword support was used. Note, 0 means nothing is
6579 said about the dword support. */
6583 ;
6586 ;
6591 else
6592 {
6594 {
6598 }
6601 {
6605 }
6606 }
6608 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6609 feature is used. */
6611 | EF_FRV_MEDIA
6612 | EF_FRV_MULADD
6615 /* If any module was compiled without -G0, clear the G0 bit. */
6619 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6623 /* We don't have to do anything if the pic flags are the same, or the new
6624 module(s) were compiled with -mlibrary-pic. */
6628 ;
6630 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6631 flags if any from the new module. */
6635 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6639 /* One module was compiled for pic and the other was not, see if we have
6640 had any relocations that are not pic-safe. */
6641 else
6642 {
6645 else
6646 {
6648 #ifndef FRV_NO_PIC_ERROR
6654 #endif
6655 }
6656 }
6658 /* Warn if different cpu is used (allow a specific cpu to override
6659 the generic cpu). */
6663 ;
6668 else
6669 {
6671 {
6682 }
6685 {
6696 }
6697 }
6699 /* Print out any mismatches from above. */
6701 {
6706 }
6708 /* Warn about any other mismatches */
6712 {
6718 }
6719 }
6721 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6725 /* Update the old flags now with changes made above. */
6733 {
6739 else
6743 }
6749 }
6751 \f
6752 bfd_boolean
6755 PTR ptr;
6756 {
6758 flagword flags;
6762 /* Print normal ELF private data. */
6769 {
6779 }
6782 {
6786 }
6789 {
6794 }
6797 {
6801 }
6832 }
6834 \f
6835 /* Support for core dump NOTE sections. */
6837 static bfd_boolean
6839 {
6844 {
6848 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6849 hardcoded offsets and sizes listed below (and contained within
6850 this lexical block) refer to fields in the target's elf_prstatus
6851 struct. */
6853 /* `pr_cursig' is at offset 12. */
6856 /* `pr_pid' is at offset 24. */
6859 /* `pr_reg' is at offset 72. */
6862 /* Most grok_prstatus implementations set `raw_size' to the size
6863 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6864 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6865 and `pr_interp_fdpic_loadmap', both of which (by design)
6866 immediately follow `pr_reg'. This will allow these fields to
6867 be viewed by GDB as registers.
6869 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6870 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6874 }
6876 /* Make a ".reg/999" section. */
6879 }
6881 static bfd_boolean
6883 {
6885 {
6889 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6892 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6896 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6899 }
6901 /* Note that for some reason, a spurious space is tacked
6902 onto the end of the args in some (at least one anyway)
6903 implementations, so strip it off if it exists. */
6905 {
6911 }
6914 }
6915 #define ELF_ARCH bfd_arch_frv
6916 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6917 #define ELF_MAXPAGESIZE 0x1000
6919 #define TARGET_BIG_SYM bfd_elf32_frv_vec
6922 #define elf_info_to_howto frv_info_to_howto_rela
6923 #define elf_backend_relocate_section elf32_frv_relocate_section
6924 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6925 #define elf_backend_gc_sweep_hook elf32_frv_gc_sweep_hook
6926 #define elf_backend_check_relocs elf32_frv_check_relocs
6927 #define elf_backend_object_p elf32_frv_object_p
6928 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
6930 #define elf_backend_can_gc_sections 1
6931 #define elf_backend_rela_normal 1
6933 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
6934 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
6935 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
6936 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
6937 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
6939 #define elf_backend_want_got_sym 1
6940 #define elf_backend_got_header_size 0
6941 #define elf_backend_want_got_plt 0
6942 #define elf_backend_plt_readonly 1
6943 #define elf_backend_want_plt_sym 0
6944 #define elf_backend_plt_header_size 0
6946 #define elf_backend_finish_dynamic_sections \
6947 elf32_frv_finish_dynamic_sections
6949 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
6950 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
6954 #undef ELF_MAXPAGESIZE
6955 #define ELF_MAXPAGESIZE 0x4000
6957 #undef TARGET_BIG_SYM
6958 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
6959 #undef TARGET_BIG_NAME
6961 #undef elf32_bed
6962 #define elf32_bed elf32_frvfdpic_bed
6964 #undef elf_info_to_howto_rel
6965 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
6967 #undef bfd_elf32_bfd_link_hash_table_create
6968 #define bfd_elf32_bfd_link_hash_table_create \
6969 frvfdpic_elf_link_hash_table_create
6970 #undef elf_backend_always_size_sections
6971 #define elf_backend_always_size_sections \
6972 elf32_frvfdpic_always_size_sections
6973 #undef elf_backend_modify_segment_map
6974 #define elf_backend_modify_segment_map \
6975 elf32_frvfdpic_modify_segment_map
6976 #undef bfd_elf32_bfd_copy_private_bfd_data
6977 #define bfd_elf32_bfd_copy_private_bfd_data \
6978 elf32_frvfdpic_copy_private_bfd_data
6980 #undef elf_backend_create_dynamic_sections
6981 #define elf_backend_create_dynamic_sections \
6982 elf32_frvfdpic_create_dynamic_sections
6983 #undef elf_backend_adjust_dynamic_symbol
6984 #define elf_backend_adjust_dynamic_symbol \
6985 elf32_frvfdpic_adjust_dynamic_symbol
6986 #undef elf_backend_size_dynamic_sections
6987 #define elf_backend_size_dynamic_sections \
6988 elf32_frvfdpic_size_dynamic_sections
6989 #undef bfd_elf32_bfd_relax_section
6990 #define bfd_elf32_bfd_relax_section \
6991 elf32_frvfdpic_relax_section
6992 #undef elf_backend_finish_dynamic_symbol
6993 #define elf_backend_finish_dynamic_symbol \
6994 elf32_frvfdpic_finish_dynamic_symbol
6995 #undef elf_backend_finish_dynamic_sections
6996 #define elf_backend_finish_dynamic_sections \
6997 elf32_frvfdpic_finish_dynamic_sections
6999 #undef elf_backend_can_make_relative_eh_frame
7000 #define elf_backend_can_make_relative_eh_frame \
7001 frvfdpic_elf_use_relative_eh_frame
7002 #undef elf_backend_can_make_lsda_relative_eh_frame
7003 #define elf_backend_can_make_lsda_relative_eh_frame \
7004 frvfdpic_elf_use_relative_eh_frame
7005 #undef elf_backend_encode_eh_address
7006 #define elf_backend_encode_eh_address \
7007 frvfdpic_elf_encode_eh_address
7009 #undef elf_backend_may_use_rel_p
7010 #define elf_backend_may_use_rel_p 1
7011 #undef elf_backend_may_use_rela_p
7012 #define elf_backend_may_use_rela_p 1
7013 /* We use REL for dynamic relocations only. */
7014 #undef elf_backend_default_use_rela_p
7015 #define elf_backend_default_use_rela_p 1
7017 #undef elf_backend_omit_section_dynsym
7018 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym