| blob | fab71ad90e4a4090257597fad13b2dc95caa5f78 |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
30 /* Forward declarations. */
31 static bfd_reloc_status_type elf32_frv_relocate_lo16
33 static bfd_reloc_status_type elf32_frv_relocate_hi16
35 static bfd_reloc_status_type elf32_frv_relocate_label24
37 static bfd_reloc_status_type elf32_frv_relocate_gprel12
40 static bfd_reloc_status_type elf32_frv_relocate_gprelu12
43 static bfd_reloc_status_type elf32_frv_relocate_gprello
46 static bfd_reloc_status_type elf32_frv_relocate_gprelhi
51 static void frv_info_to_howto_rela
53 static bfd_boolean elf32_frv_relocate_section
56 static bfd_boolean elf32_frv_add_symbol_hook
59 static bfd_reloc_status_type frv_final_link_relocate
62 static bfd_boolean elf32_frv_check_relocs
65 static int elf32_frv_machine
67 static bfd_boolean elf32_frv_object_p
69 static bfd_boolean frv_elf_set_private_flags
71 static bfd_boolean frv_elf_copy_private_bfd_data
73 static bfd_boolean frv_elf_merge_private_bfd_data
75 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,
1010 {
1013 }
1016 }
1018 /* Decide whether a reference to a symbol can be resolved locally or
1019 not. If the symbol is protected, we want the local address, but
1020 its function descriptor must be assigned by the dynamic linker. */
1021 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
1022 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1023 || ! elf_hash_table (INFO)->dynamic_sections_created)
1024 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
1025 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1027 /* This structure collects information on what kind of GOT, PLT or
1028 function descriptors are required by relocations that reference a
1029 certain symbol. */
1030 struct frvfdpic_relocs_info
1031 {
1032 /* The index of the symbol, as stored in the relocation r_info, if
1033 we have a local symbol; -1 otherwise. */
1035 union
1036 {
1037 /* The input bfd in which the symbol is defined, if it's a local
1038 symbol. */
1040 /* If symndx == -1, the hash table entry corresponding to a global
1041 symbol (even if it turns out to bind locally, in which case it
1042 should ideally be replaced with section's symndx + addend). */
1045 /* The addend of the relocation that references the symbol. */
1046 bfd_vma addend;
1048 /* The fields above are used to identify an entry. The fields below
1049 contain information on how an entry is used and, later on, which
1050 locations it was assigned. */
1051 /* The following 3 fields record whether the symbol+addend above was
1052 ever referenced with a GOT relocation. The 12 suffix indicates a
1053 GOT12 relocation; los is used for GOTLO relocations that are not
1054 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1055 pairs. */
1059 /* Whether a FUNCDESC relocation references symbol+addend. */
1061 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1065 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1069 /* Whether a GETTLSOFF relocation references symbol+addend. */
1071 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1072 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1073 We might instead just pre-compute flags telling whether the
1074 object is suitable for local exec, initial exec or general
1075 dynamic addressing, and use that all over the place. We could
1076 also try to do a better job of merging TLSOFF and TLSDESC entries
1077 in main executables, but perhaps we can get rid of TLSDESC
1078 entirely in them instead. */
1079 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1083 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1087 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1088 GOTOFFHI relocations. The addend doesn't really matter, since we
1089 envision that this will only be used to check whether the symbol
1090 is mapped to the same segment as the got. */
1092 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1094 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1095 relocation. */
1097 /* Whether we need a PLT entry for a symbol. Should be implied by
1098 something like:
1099 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1101 /* Whether a function descriptor should be created in this link unit
1102 for symbol+addend. Should be implied by something like:
1103 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1104 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1105 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1107 /* Whether a lazy PLT entry is needed for this symbol+addend.
1108 Should be implied by something like:
1109 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1110 && ! (info->flags & DF_BIND_NOW)) */
1112 /* Whether we've already emitted GOT relocations and PLT entries as
1113 needed for this symbol. */
1116 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1117 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1118 symbol+addend. */
1121 /* The number of .rofixups entries and dynamic relocations allocated
1122 for this symbol, minus any that might have already been used. */
1125 /* The offsets of the GOT entries assigned to symbol+addend, to the
1126 function descriptor's address, and to a function descriptor,
1127 respectively. Should be zero if unassigned. The offsets are
1128 counted from the value that will be assigned to the PIC register,
1129 not from the beginning of the .got section. */
1131 /* The offsets of the PLT entries assigned to symbol+addend,
1132 non-lazy and lazy, respectively. If unassigned, should be
1133 (bfd_vma)-1. */
1135 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1137 /* The offset of the TLS offset PLT entry. */
1138 bfd_vma tlsplt_entry;
1139 };
1141 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1142 static hashval_t
1144 {
1150 }
1152 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1153 identical. */
1154 static int
1156 {
1162 }
1164 /* Find or create an entry in a hash table HT that matches the key
1165 fields of the given ENTRY. If it's not found, memory for a new
1166 entry is allocated in ABFD's obstack. */
1172 {
1195 }
1197 /* Obtain the address of the entry in HT associated with H's symbol +
1198 addend, creating a new entry if none existed. ABFD is only used
1199 for memory allocation purposes. */
1204 bfd_vma addend,
1206 {
1214 }
1216 /* Obtain the address of the entry in HT associated with the SYMNDXth
1217 local symbol of the input bfd ABFD, plus the addend, creating a new
1218 entry if none existed. */
1223 bfd_vma addend,
1225 {
1233 }
1235 /* Merge fields set by check_relocs() of two entries that end up being
1236 mapped to the same (presumably global) symbol. */
1241 {
1262 }
1264 /* Every block of 65535 lazy PLT entries shares a single call to the
1265 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1266 32767, counting from 0). All other lazy PLT entries branch to it
1267 in a single instruction. */
1269 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1270 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1272 /* Add a dynamic relocation to the SRELOC section. */
1278 {
1279 Elf_Internal_Rela outrel;
1280 bfd_vma reloc_offset;
1292 /* If the entry's index is zero, this relocation was probably to a
1293 linkonce section that got discarded. We reserved a dynamic
1294 relocation, but it was for another entry than the one we got at
1295 the time of emitting the relocation. Unfortunately there's no
1296 simple way for us to catch this situation, since the relocation
1297 is cleared right before calling relocate_section, at which point
1298 we no longer know what the relocation used to point to. */
1300 {
1303 }
1306 }
1308 /* Add a fixup to the ROFIXUP section. */
1310 static bfd_vma
1313 {
1314 bfd_vma fixup_offset;
1321 {
1324 }
1328 {
1329 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1330 above. */
1333 }
1336 }
1338 /* Find the segment number in which OSEC, and output section, is
1339 located. */
1341 static unsigned
1343 {
1347 }
1351 {
1355 }
1357 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1359 /* Return the base VMA address which should be subtracted from real addresses
1360 when resolving TLSMOFF relocation.
1361 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1363 static bfd_vma
1365 {
1366 /* If tls_sec is NULL, we should have signalled an error already. */
1370 }
1372 /* Generate relocations for GOT entries, function descriptors, and
1373 code for PLT and lazy PLT entries. */
1381 bfd_vma addend)
1383 {
1393 {
1394 /* If the symbol is dynamic, consider it for dynamic
1395 relocations, otherwise decay to section + offset. */
1398 else
1399 {
1405 else
1407 }
1408 }
1410 /* Generate relocation for GOT entry pointing to the symbol. */
1412 {
1416 /* If the symbol is dynamic but binds locally, use
1417 section+offset. */
1420 {
1423 else
1428 else
1430 }
1432 /* If we're linking an executable at a fixed address, we can
1433 omit the dynamic relocation as long as the symbol is local to
1434 this module. */
1438 {
1446 ->vma
1450 }
1451 else
1453 _bfd_elf_section_offset
1467 }
1469 /* Generate relocation for GOT entry pointing to a canonical
1470 function descriptor. */
1472 {
1479 {
1480 /* If the symbol is dynamic and there may be dynamic symbol
1481 resolution because we are, or are linked with, a shared
1482 library, emit a FUNCDESC relocation such that the dynamic
1483 linker will allocate the function descriptor. If the
1484 symbol needs a non-local function descriptor but binds
1485 locally (e.g., its visibility is protected, emit a
1486 dynamic relocation decayed to section+offset. */
1491 {
1497 }
1500 {
1505 {
1512 }
1513 }
1514 else
1515 {
1516 /* Otherwise, we know we have a private function descriptor,
1517 so reference it directly. */
1525 }
1527 /* If there is room for dynamic symbol resolution, emit the
1528 dynamic relocation. However, if we're linking an
1529 executable at a fixed location, we won't have emitted a
1530 dynamic symbol entry for the got section, so idx will be
1531 zero, which means we can and should compute the address
1532 of the private descriptor ourselves. */
1536 {
1543 ->output_offset
1546 }
1547 else
1550 _bfd_elf_section_offset
1560 }
1566 }
1568 /* Generate relocation to fill in a private function descriptor in
1569 the GOT. */
1571 {
1574 bfd_vma ofst;
1577 /* If the symbol is dynamic but binds locally, use
1578 section+offset. */
1581 {
1584 else
1589 else
1591 }
1593 /* If we're linking an executable at a fixed address, we can
1594 omit the dynamic relocation as long as the symbol is local to
1595 this module. */
1598 {
1604 {
1610 ->output_offset
1618 ->output_offset
1621 }
1622 }
1623 else
1624 {
1625 ofst =
1627 entry->lazyplt
1630 _bfd_elf_section_offset
1640 }
1642 /* If we've omitted the dynamic relocation, just emit the fixed
1643 addresses of the symbol and of the local GOT base offset. */
1645 {
1650 }
1652 {
1654 {
1661 }
1665 /* A function descriptor used for lazy or local resolving is
1666 initialized such that its high word contains the output
1667 section index in which the PLT entries are located, and
1668 the low word contains the address of the lazy PLT entry
1669 entry point, that must be within the memory region
1670 assigned to that section. */
1674 highword = _frvfdpic_osec_to_segment
1676 }
1677 else
1678 {
1679 /* A function descriptor for a local function gets the index
1680 of the section. For a non-local function, it's
1681 disregarded. */
1687 else
1688 highword = _frvfdpic_osec_to_segment
1690 }
1700 }
1702 /* Generate code for the PLT entry. */
1704 {
1710 /* Figure out what kind of PLT entry we need, depending on the
1711 location of the function descriptor within the GOT. */
1714 {
1715 /* lddi @(gr15, fd_entry), gr14 */
1718 plt_code);
1720 }
1721 else
1722 {
1725 {
1726 /* setlos lo(fd_entry), gr14 */
1728 0x9cfc0000
1730 plt_code);
1732 }
1733 else
1734 {
1735 /* sethi.p hi(fd_entry), gr14
1736 setlo lo(fd_entry), gr14 */
1738 0x1cf80000
1741 plt_code);
1744 0x9cf40000
1746 plt_code);
1748 }
1749 /* ldd @(gr14,gr15),gr14 */
1752 }
1753 /* jmpl @(gr14,gr0) */
1755 }
1757 /* Generate code for the lazy PLT entry. */
1759 {
1762 bfd_vma resolverStub_addr;
1773 {
1774 /* This is a lazy PLT entry that includes a resolver call. */
1775 /* ldd @(gr15,gr0), gr4
1776 jmpl @(gr4,gr0) */
1779 }
1780 else
1781 {
1782 /* bra resolverStub */
1784 0xc01a0000
1787 lzplt_code);
1788 }
1789 }
1791 /* Generate relocation for GOT entry holding the TLS offset. */
1793 {
1799 {
1800 /* If the symbol is dynamic but binds locally, use
1801 section+offset. */
1803 {
1806 else
1812 else
1814 }
1815 }
1817 /* *ABS*+addend is special for TLS relocations, use only the
1818 addend. */
1823 ;
1824 /* If we're linking an executable, we can entirely omit the
1825 dynamic relocation if the symbol is local to this module. */
1829 {
1832 }
1833 else
1834 {
1838 {
1840 {
1845 }
1848 }
1850 _bfd_elf_section_offset
1860 }
1866 }
1869 {
1873 /* If the symbol is dynamic but binds locally, use
1874 section+offset. */
1877 {
1880 else
1885 else
1887 }
1889 /* If we didn't set up a TLS offset entry, but we're linking an
1890 executable and the symbol binds locally, we can use the
1891 module offset in the TLS descriptor in relaxations. */
1901 {
1902 /* *ABS*+addend is special for TLS relocations, use only the
1903 addend for the TLS offset, and take the module id as
1904 0. */
1908 ;
1909 /* For other TLS symbols that bind locally, add the section
1910 TLS offset to the addend. */
1927 ->output_offset
1933 /* We've used one of the reserved fixups, so discount it so
1934 that we can check at the end that we've used them
1935 all. */
1938 /* While at that, make sure the ret instruction makes to the
1939 right location in the PLT. We could do it only when we
1940 got to 0, but since the check at the end will only print
1941 a warning, make sure we have the ret in place in case the
1942 warning is missed. */
1946 }
1947 else
1948 {
1952 {
1954 {
1959 }
1962 }
1965 _bfd_elf_section_offset
1980 }
1986 }
1988 /* Generate code for the get-TLS-offset PLT entry. */
1990 {
1997 {
2001 /* sec may be NULL when referencing an undefweak symbol
2002 while linking a static executable. */
2004 {
2007 }
2008 else
2009 {
2012 else
2018 else
2020 }
2022 /* *ABS*+addend is special for TLS relocations, use only the
2023 addend for the TLS offset, and take the module id as
2024 0. */
2028 ;
2029 /* For other TLS symbols that bind locally, add the section
2030 TLS offset to the addend. */
2036 {
2037 /* setlos lo(ad), gr9 */
2039 0x92fc0000
2040 | (ad
2042 plt_code);
2044 }
2045 else
2046 {
2047 /* sethi.p hi(ad), gr9
2048 setlo lo(ad), gr9 */
2050 0x12f80000
2053 plt_code);
2056 0x92f40000
2057 | (ad
2059 plt_code);
2061 }
2062 /* ret */
2064 }
2066 {
2067 /* Figure out what kind of PLT entry we need, depending on the
2068 location of the TLS descriptor within the GOT. */
2071 {
2072 /* ldi @(gr15, tlsoff_entry), gr9 */
2076 plt_code);
2078 }
2079 else
2080 {
2083 {
2084 /* setlos lo(tlsoff_entry), gr8 */
2086 0x90fc0000
2089 plt_code);
2091 }
2092 else
2093 {
2094 /* sethi.p hi(tlsoff_entry), gr8
2095 setlo lo(tlsoff_entry), gr8 */
2097 0x10f80000
2100 plt_code);
2103 0x90f40000
2106 plt_code);
2108 }
2109 /* ld @(gr15,gr8),gr9 */
2112 }
2113 /* ret */
2115 }
2116 else
2117 {
2120 /* Figure out what kind of PLT entry we need, depending on the
2121 location of the TLS descriptor within the GOT. */
2124 {
2125 /* lddi @(gr15, tlsdesc_entry), gr8 */
2129 plt_code);
2131 }
2132 else
2133 {
2136 {
2137 /* setlos lo(tlsdesc_entry), gr8 */
2139 0x90fc0000
2142 plt_code);
2144 }
2145 else
2146 {
2147 /* sethi.p hi(tlsdesc_entry), gr8
2148 setlo lo(tlsdesc_entry), gr8 */
2150 0x10f80000
2153 plt_code);
2156 0x90f40000
2159 plt_code);
2161 }
2162 /* ldd @(gr15,gr8),gr8 */
2165 }
2166 /* jmpl @(gr8,gr0) */
2168 }
2169 }
2172 }
2174 /* Handle an FRV small data reloc. */
2176 static bfd_reloc_status_type
2184 bfd_vma value;
2185 {
2186 bfd_vma insn;
2187 bfd_vma gp;
2211 }
2213 /* Handle an FRV small data reloc. for the u12 field. */
2215 static bfd_reloc_status_type
2223 bfd_vma value;
2224 {
2225 bfd_vma insn;
2226 bfd_vma gp;
2228 bfd_vma mask;
2246 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2253 }
2255 /* Handle an FRV ELF HI16 reloc. */
2257 static bfd_reloc_status_type
2262 bfd_vma value;
2263 {
2264 bfd_vma insn;
2279 }
2280 static bfd_reloc_status_type
2285 bfd_vma value;
2286 {
2287 bfd_vma insn;
2301 }
2303 /* Perform the relocation for the CALL label24 instruction. */
2305 static bfd_reloc_status_type
2311 bfd_vma value;
2312 {
2313 bfd_vma insn;
2314 bfd_vma label6;
2315 bfd_vma label18;
2317 /* The format for the call instruction is:
2319 0 000000 0001111 000000000000000000
2320 label6 opcode label18
2322 The branch calculation is: pc + (4*label24)
2323 where label24 is the concatenation of label6 and label18. */
2325 /* Grab the instruction. */
2346 }
2348 static bfd_reloc_status_type
2356 bfd_vma value;
2357 {
2358 bfd_vma insn;
2359 bfd_vma gp;
2381 }
2383 static bfd_reloc_status_type
2391 bfd_vma value;
2392 {
2393 bfd_vma insn;
2394 bfd_vma gp;
2417 }
2422 bfd_reloc_code_real_type code;
2423 {
2425 {
2436 /* Fall through. */
2574 }
2577 }
2581 {
2586 i++)
2597 }
2599 /* Set the howto pointer for an FRV ELF reloc. */
2601 static void
2606 {
2611 {
2623 }
2624 }
2626 /* Set the howto pointer for an FRV ELF REL reloc. */
2627 static void
2630 {
2635 {
2659 }
2660 }
2661 \f
2662 /* Perform a single relocation. By default we use the standard BFD
2663 routines, but a few relocs, we have to do them ourselves. */
2665 static bfd_reloc_status_type
2667 relocation)
2673 bfd_vma relocation;
2674 {
2678 }
2680 \f
2681 /* Relocate an FRV ELF section.
2683 The RELOCATE_SECTION function is called by the new ELF backend linker
2684 to handle the relocations for a section.
2686 The relocs are always passed as Rela structures; if the section
2687 actually uses Rel structures, the r_addend field will always be
2688 zero.
2690 This function is responsible for adjusting the section contents as
2691 necessary, and (if using Rela relocs and generating a relocatable
2692 output file) adjusting the reloc addend as necessary.
2694 This function does not have to worry about setting the reloc
2695 address or the reloc symbol index.
2697 LOCAL_SYMS is a pointer to the swapped in local symbols.
2699 LOCAL_SECTIONS is an array giving the section in the input file
2700 corresponding to the st_shndx field of each local symbol.
2702 The global hash table entry for the global symbols can be found
2703 via elf_sym_hashes (input_bfd).
2705 When generating relocatable output, this function must handle
2706 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2707 going to be the section symbol corresponding to the output
2708 section, which means that the addend must be adjusted
2709 accordingly. */
2711 static bfd_boolean
2722 {
2734 {
2737 }
2749 else
2755 else
2761 else
2766 else
2770 {
2776 bfd_vma relocation;
2777 bfd_reloc_status_type r;
2797 {
2802 name = bfd_elf_string_from_elf_section
2805 }
2806 else
2807 {
2808 bfd_boolean warned;
2809 bfd_boolean unresolved_reloc;
2816 }
2819 {
2820 /* For relocs against symbols from removed linkonce sections,
2821 or sections discarded by a linker script, we just want the
2822 section contents zeroed. Avoid any special processing. */
2827 }
2837 {
2840 }
2843 {
2883 else
2884 /* In order to find the entry we created before, we must
2885 use the original addend, not the one that may have been
2886 modified by _bfd_elf_rela_local_sym(). */
2896 {
2901 }
2906 non_fdpic:
2909 {
2914 }
2916 }
2919 {
2942 }
2944 /* Try to apply TLS relaxations. */
2947 {
2949 #define LOCAL_EXEC_P(info, picrel) \
2950 ((info)->executable \
2951 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2952 #define INITIAL_EXEC_P(info, picrel) \
2953 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2954 && (picrel)->tlsoff_entry)
2956 #define IN_RANGE_FOR_OFST12_P(value) \
2957 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2958 #define IN_RANGE_FOR_SETLOS_P(value) \
2959 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2960 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2961 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2963 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2964 (LOCAL_EXEC_P ((info), (picrel)) \
2965 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2966 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2967 (INITIAL_EXEC_P ((info), (picrel)) \
2968 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2970 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2971 (LOCAL_EXEC_P ((info), (picrel)))
2972 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2973 (INITIAL_EXEC_P ((info), (picrel)))
2975 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2976 (LOCAL_EXEC_P ((info), (picrel)) \
2977 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2982 /* Is this a call instruction? */
2984 {
2990 }
2994 {
2995 /* Replace the call instruction (except the packing bit)
2996 with setlos #tlsmofflo(symbol+offset), gr9. */
3004 }
3007 {
3008 /* Replace the call instruction (except the packing bit)
3009 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
3017 }
3024 /* Is this an lddi instruction? */
3026 {
3032 }
3037 info))
3038 {
3039 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3040 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3041 Preserve the packing bit. */
3051 }
3055 {
3056 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3057 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3058 Preserve the packing bit. */
3068 }
3071 {
3072 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3073 with ldi @(grB, #gottlsoff12(symbol+offset),
3074 gr<C+1>. Preserve the packing bit. If gottlsoff12
3075 overflows, we'll error out, but that's sort-of ok,
3076 since we'd started with gottlsdesc12, that's actually
3077 more demanding. Compiling with -fPIE instead of
3078 -fpie would fix it; linking with --relax should fix
3079 it as well. */
3088 }
3095 /* Is this a sethi instruction? */
3097 {
3103 }
3109 {
3110 /* Replace sethi with a nop. Preserve the packing bit. */
3115 /* Nothing to relocate. */
3117 }
3120 {
3121 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3125 }
3132 /* Is this a setlo or setlos instruction? */
3134 {
3141 }
3147 {
3148 /* Replace setlo/setlos with a nop. Preserve the
3149 packing bit. */
3154 /* Nothing to relocate. */
3156 }
3159 {
3160 /* If the corresponding sethi (if it exists) decayed
3161 to a nop, make sure this becomes (or already is) a
3162 setlos, not setlo. */
3164 {
3167 }
3169 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3173 }
3180 /* Is this an ldd instruction? */
3182 {
3188 }
3193 info))
3194 {
3195 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3196 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3197 Preserve the packing bit. */
3207 }
3211 {
3212 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3213 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3214 Preserve the packing bit. */
3224 }
3228 {
3229 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3230 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3231 Preserve the packing bit. */
3241 }
3244 {
3245 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3246 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3247 Preserve the packing bit. */
3253 /* #tlsoff(symbol+offset) is just a relaxation
3254 annotation, so there's nothing left to
3255 relocate. */
3257 }
3264 /* Is this a calll or callil instruction? */
3266 {
3273 }
3278 info))
3279 {
3280 /* Replace calll with a nop. Preserve the packing bit. */
3285 /* Nothing to relocate. */
3287 }
3291 {
3292 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3293 Preserve the packing bit. */
3301 }
3304 {
3305 /* Replace calll with a nop. Preserve the packing bit. */
3310 /* Nothing to relocate. */
3312 }
3319 /* Is this an ldi instruction? */
3321 {
3327 }
3331 {
3332 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3333 with setlos #tlsmofflo(symbol+offset), grC.
3334 Preserve the packing bit. */
3342 }
3349 /* Is this a sethi instruction? */
3351 {
3357 }
3363 {
3364 /* Replace sethi with a nop. Preserve the packing bit. */
3369 /* Nothing to relocate. */
3371 }
3378 /* Is this a setlo or setlos instruction? */
3380 {
3387 }
3393 {
3394 /* Replace setlo/setlos with a nop. Preserve the
3395 packing bit. */
3400 /* Nothing to relocate. */
3402 }
3409 /* Is this an ld instruction? */
3411 {
3417 }
3421 {
3422 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3423 with setlos #tlsmofflo(symbol+offset), grC.
3424 Preserve the packing bit. */
3432 }
3436 {
3437 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3438 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3439 Preserve the packing bit. */
3447 }
3454 /* Is this a sethi instruction? */
3456 {
3462 }
3465 info))
3466 {
3467 /* Replace sethi with a nop. Preserve the packing bit. */
3472 /* Nothing to relocate. */
3474 }
3481 /* Is this a setlo or setlos instruction? */
3483 {
3490 }
3493 info))
3494 /* If the corresponding sethi (if it exists) decayed
3495 to a nop, make sure this becomes (or already is) a
3496 setlos, not setlo. */
3497 {
3500 }
3504 /*
3505 There's nothing to relax in these:
3506 R_FRV_TLSDESC_VALUE
3507 R_FRV_TLSOFF
3508 R_FRV_TLSMOFF12
3509 R_FRV_TLSMOFFHI
3510 R_FRV_TLSMOFFLO
3511 R_FRV_TLSMOFF
3512 */
3516 }
3519 {
3525 {
3530 }
3531 /* We don't want to warn on calls to undefined weak symbols,
3532 as calls to them must be protected by non-NULL tests
3533 anyway, and unprotected calls would invoke undefined
3534 behavior. */
3538 else
3578 {
3584 {
3585 /* If the symbol is dynamic and there may be dynamic
3586 symbol resolution because we are or are linked with a
3587 shared library, emit a FUNCDESC relocation such that
3588 the dynamic linker will allocate the function
3589 descriptor. If the symbol needs a non-local function
3590 descriptor but binds locally (e.g., its visibility is
3591 protected, emit a dynamic relocation decayed to
3592 section+offset. */
3596 {
3601 }
3603 {
3605 {
3610 }
3612 }
3613 else
3614 {
3615 /* Otherwise, we know we have a private function
3616 descriptor, so reference it directly. */
3624 }
3626 /* If there is room for dynamic symbol resolution, emit
3627 the dynamic relocation. However, if we're linking an
3628 executable at a fixed location, we won't have emitted a
3629 dynamic symbol entry for the got section, so idx will
3630 be zero, which means we can and should compute the
3631 address of the private descriptor ourselves. */
3634 {
3639 {
3640 bfd_vma offset;
3643 input_section
3645 {
3651 }
3653 offset = _bfd_elf_section_offset
3659 frvfdpic_gotfixup_section
3661 offset + input_section
3664 picrel);
3665 }
3666 }
3670 {
3671 bfd_vma offset;
3674 input_section
3676 {
3682 }
3684 offset = _bfd_elf_section_offset
3691 offset + input_section
3695 }
3696 else
3698 }
3700 /* We want the addend in-place because dynamic
3701 relocations are REL. Setting relocation to it should
3702 arrange for it to be installed. */
3704 }
3710 {
3713 }
3714 /* Fall through. */
3716 {
3720 /* If the symbol is dynamic but binds locally, use
3721 section+offset. */
3723 {
3725 {
3730 }
3732 }
3733 else
3734 {
3737 else
3745 else
3747 }
3749 /* If we're linking an executable at a fixed address, we
3750 can omit the dynamic relocation as long as the symbol
3751 is defined in the current link unit (which is implied
3752 by its output section not being NULL). */
3755 {
3762 {
3764 input_section
3766 {
3772 }
3774 {
3775 bfd_vma offset = _bfd_elf_section_offset
3780 {
3782 frvfdpic_gotfixup_section
3784 offset + input_section
3787 picrel);
3789 _frvfdpic_add_rofixup
3792 offset
3795 }
3796 }
3797 }
3798 }
3799 else
3800 {
3804 {
3805 bfd_vma offset;
3808 input_section
3810 {
3816 }
3818 offset = _bfd_elf_section_offset
3825 offset + input_section
3829 }
3832 /* We want the addend in-place because dynamic
3833 relocations are REL. Setting relocation to it
3834 should arrange for it to be installed. */
3836 }
3839 {
3840 /* If we've omitted the dynamic relocation, just emit
3841 the fixed addresses of the symbol and of the local
3842 GOT base offset. */
3850 else
3851 /* A function descriptor used for lazy or local
3852 resolving is initialized such that its high word
3853 contains the output section index in which the
3854 PLT entries are located, and the low word
3855 contains the offset of the lazy PLT entry entry
3856 point into that section. */
3861 sec
3864 }
3865 }
3912 {
3915 }
3917 {
3921 }
3922 else
3941 /* These shouldn't be present in input object files. */
3948 /* These are just annotations for relaxation, nothing to do
3949 here. */
3958 }
3961 {
3962 /* If you take this out, remove the #error from fdpic-static-6.d
3963 in the ld testsuite. */
3964 /* This helps catch problems in GCC while we can't do more
3965 than static linking. The idea is to test whether the
3966 input file basename is crt0.o only once. */
3968 silence_segment_error =
3977 /* We don't want duplicate errors for undefined
3978 symbols. */
3981 {
3987 else
3992 }
3995 /* PR 6446: EF_FRV_PIC should be cleared if
3996 there are any inter-segment relocations. */
3998 }
4001 {
4004 /* We need the addend to be applied before we shift the
4005 value right. */
4007 /* Fall through. */
4014 /* Fall through. */
4028 }
4031 {
4035 /* Fall through. */
4037 /* When referencing a GOT entry, a function descriptor or a
4038 PLT, we don't want the addend to apply to the reference,
4039 but rather to the referenced symbol. The actual entry
4040 will have already been created taking the addend into
4041 account, so cancel it out here. */
4058 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
4059 here, since we do want to apply the addend to the others.
4060 Note that we've applied the addend to GOTOFFHI before we
4061 shifted it right. */
4069 }
4101 else
4106 {
4110 {
4137 }
4140 {
4145 }
4149 }
4150 }
4153 }
4154 \f
4155 /* Return the section that should be marked against GC for a given
4156 relocation. */
4164 {
4167 {
4171 }
4174 }
4175 \f
4176 /* Hook called by the linker routine which adds symbols from an object
4177 file. We use it to put .comm items in .scomm, and not .comm. */
4179 static bfd_boolean
4188 {
4192 {
4193 /* Common symbols less than or equal to -G nn bytes are
4194 automatically put into .sbss. */
4199 {
4201 (SEC_ALLOC
4202 | SEC_IS_COMMON
4206 }
4210 }
4213 }
4215 /* We need dynamic symbols for every section, since segments can
4216 relocate independently. */
4217 static bfd_boolean
4220 ATTRIBUTE_UNUSED,
4222 {
4224 {
4227 /* If sh_type is yet undecided, assume it could be
4228 SHT_PROGBITS/SHT_NOBITS. */
4232 /* There shouldn't be section relative relocations
4233 against any other section. */
4236 }
4237 }
4239 /* Create a .got section, as well as its additional info field. This
4240 is almost entirely copied from
4241 elflink.c:_bfd_elf_create_got_section(). */
4243 static bfd_boolean
4245 {
4254 /* This function may be called more than once. */
4259 /* Machine specific: although pointers are 32-bits wide, we want the
4260 GOT to be aligned to a 64-bit boundary, such that function
4261 descriptors in it can be accessed with 64-bit loads and
4262 stores. */
4275 {
4280 }
4283 {
4284 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4285 (or .got.plt) section. We don't do this in the linker script
4286 because we don't want to define the symbol if we are not creating
4287 a global offset table. */
4293 /* Machine-specific: we want the symbol for executables as
4294 well. */
4297 }
4299 /* The first bit of the global offset table is the header. */
4302 /* This is the machine-specific part. Create and initialize section
4303 data for the got. */
4305 {
4308 frvfdpic_relocs_info_hash,
4309 frvfdpic_relocs_info_eq,
4322 /* Machine-specific. */
4332 }
4333 else
4334 {
4337 }
4339 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4340 turns out that we're linking with a different linker script, the
4341 linker script will override it. */
4352 /* Machine-specific: we want the symbol for executables as well. */
4359 /* FDPIC supports Thread Local Storage, and this may require a
4360 procedure linkage table for TLS PLT entries. */
4362 /* This is mostly copied from
4363 elflink.c:_bfd_elf_create_dynamic_sections(). */
4376 /* FRV-specific: remember it. */
4379 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4380 .plt section. */
4382 {
4388 }
4390 /* FRV-specific: we want rel relocations for the plt. */
4396 /* FRV-specific: remember it. */
4400 }
4402 /* Make sure the got and plt sections exist, and that our pointers in
4403 the link hash table point to them. */
4405 static bfd_boolean
4407 {
4408 /* This is mostly copied from
4409 elflink.c:_bfd_elf_create_dynamic_sections(). */
4410 flagword flags;
4417 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4418 .rel[a].bss sections. */
4420 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4421 way. */
4425 /* FRV-specific: make sure we created everything we wanted. */
4432 {
4433 /* The .dynbss section is a place to put symbols which are defined
4434 by dynamic objects, are referenced by regular objects, and are
4435 not functions. We must allocate space for them in the process
4436 image and use a R_*_COPY reloc to tell the dynamic linker to
4437 initialize them at run time. The linker script puts the .dynbss
4438 section into the .bss section of the final image. */
4444 /* The .rel[a].bss section holds copy relocs. This section is not
4445 normally needed. We need to create it here, though, so that the
4446 linker will map it to an output section. We can't just create it
4447 only if we need it, because we will not know whether we need it
4448 until we have seen all the input files, and the first time the
4449 main linker code calls BFD after examining all the input files
4450 (size_dynamic_sections) the input sections have already been
4451 mapped to the output sections. If the section turns out not to
4452 be needed, we can discard it later. We will never need this
4453 section when generating a shared object, since they do not use
4454 copy relocs. */
4456 {
4464 }
4465 }
4468 }
4470 /* Compute the total GOT and PLT size required by each symbol in each
4471 range. Symbols may require up to 4 words in the GOT: an entry
4472 pointing to the symbol, an entry pointing to its function
4473 descriptor, and a private function descriptors taking two
4474 words. */
4476 static void
4479 {
4480 /* Allocate space for a GOT entry pointing to the symbol. */
4487 else
4491 /* Allocate space for a GOT entry pointing to the function
4492 descriptor. */
4499 else
4503 /* Decide whether we need a PLT entry, a function descriptor in the
4504 GOT, and a lazy PLT entry for this symbol. */
4518 /* Allocate space for a function descriptor. */
4527 else
4533 }
4535 /* Compute the total GOT size required by each TLS symbol in each
4536 range. Symbols may require up to 5 words in the GOT: an entry
4537 holding the TLS offset for the symbol, and an entry with a full TLS
4538 descriptor taking 4 words. */
4540 static void
4543 bfd_boolean subtract)
4544 {
4547 /* Allocate space for a GOT entry with the TLS offset of the
4548 symbol. */
4555 else
4559 /* If there's any TLSOFF relocation, mark the output file as not
4560 suitable for dlopening. This mark will remain even if we relax
4561 all such relocations, but this is not a problem, since we'll only
4562 do so for executables, and we definitely don't want anyone
4563 dlopening executables. */
4567 /* Allocate space for a TLS descriptor. */
4576 else
4579 }
4581 /* Compute the number of dynamic relocations and fixups that a symbol
4582 requires, and add (or subtract) from the grand and per-symbol
4583 totals. */
4585 static void
4588 bfd_boolean subtract)
4589 {
4593 {
4597 /* In the executable, TLS relocations to symbols that bind
4598 locally (including those that resolve to global TLS offsets)
4599 are resolved immediately, without any need for fixups or
4600 dynamic relocations. In shared libraries, however, we must
4601 emit dynamic relocations even for local symbols, because we
4602 don't know the module id the library is going to get at
4603 run-time, nor its TLS base offset. */
4608 }
4609 else
4610 {
4612 {
4618 }
4619 else
4620 {
4623 }
4627 {
4631 }
4632 else
4634 }
4637 {
4641 }
4648 }
4650 /* Look for opportunities to relax TLS relocations. We can assume
4651 we're linking the main executable or a static-tls library, since
4652 otherwise we wouldn't have got here. When relaxing, we have to
4653 first undo any previous accounting of TLS uses of fixups, dynamic
4654 relocations, GOT and PLT entries. */
4656 static void
4659 bfd_boolean relaxing)
4660 {
4667 {
4669 {
4673 }
4675 /* When linking an executable, we can always decay GOTTLSDESC to
4676 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4677 When linking a static-tls shared library, using TLSMOFF is
4678 not an option, but we can still use GOTTLSOFF. When decaying
4679 to GOTTLSOFF, we must keep the GOT entry in range. We know
4680 it has to fit because we'll be trading the 4 words of hte TLS
4681 descriptor for a single word in the same range. */
4685 {
4689 }
4692 }
4694 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4695 main executable. We have to check whether the symbol's TLSOFF is
4696 in range for a setlos. For symbols with a hash entry, we can
4697 determine exactly what to do; for others locals, we don't have
4698 addresses handy, so we use the size of the TLS section as an
4699 approximation. If we get it wrong, we'll retain a GOT entry
4700 holding the TLS offset (without dynamic relocations or fixups),
4701 but we'll still optimize away the loads from it. Since TLS sizes
4702 are generally very small, it's probably not worth attempting to
4703 do better than this. */
4709 /* The above may hold for an undefweak TLS symbol, so make
4710 sure we don't have this case before accessing def.value
4711 and def.section. */
4723 {
4725 {
4729 }
4733 }
4735 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4736 have a #gottlsoff12 relocation for this entry, or if we can fit
4737 one more in the 12-bit (and 16-bit) ranges. */
4740 || (relaxing
4745 {
4747 {
4751 }
4755 }
4758 {
4761 }
4764 }
4766 /* Compute the total GOT and PLT size required by each symbol in each range. *
4767 Symbols may require up to 4 words in the GOT: an entry pointing to
4768 the symbol, an entry pointing to its function descriptor, and a
4769 private function descriptors taking two words. */
4771 static int
4773 {
4781 else
4782 {
4785 }
4788 }
4790 /* Determine the positive and negative ranges to be used by each
4791 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4792 double-word boundary, are the minimum (negative) and maximum
4793 (positive) GOT offsets already used by previous ranges, except for
4794 an ODD entry that may have been left behind. GOT and FD indicate
4795 the size of GOT entries and function descriptors that must be
4796 placed within the range from -WRAP to WRAP. If there's room left,
4797 up to FDPLT bytes should be reserved for additional function
4798 descriptors. */
4802 bfd_signed_vma fdcur,
4803 bfd_signed_vma odd,
4804 bfd_signed_vma cur,
4805 bfd_vma got,
4806 bfd_vma fd,
4807 bfd_vma fdplt,
4808 bfd_vma tlsd,
4809 bfd_vma tlsdplt,
4810 bfd_vma wrap)
4811 {
4815 /* Start at the given initial points. */
4819 /* If we had an incoming odd word and we have any got entries that
4820 are going to use it, consume it, otherwise leave gad->odd at
4821 zero. We might force gad->odd to zero and return the incoming
4822 odd such that it is used by the next range, but then GOT entries
4823 might appear to be out of order and we wouldn't be able to
4824 shorten the GOT by one word if it turns out to end with an
4825 unpaired GOT entry. */
4827 {
4831 }
4832 else
4835 /* If we're left with an unpaired GOT entry, compute its location
4836 such that we can return it. Otherwise, if got doesn't require an
4837 odd number of words here, either odd was already zero in the
4838 block above, or it was set to zero because got was non-zero, or
4839 got was already zero. In the latter case, we want the value of
4840 odd to carry over to the return statement, so we don't want to
4841 reset odd unless the condition below is true. */
4843 {
4846 }
4848 /* Compute the tentative boundaries of this range. */
4853 /* If function descriptors took too much space, wrap some of them
4854 around. */
4856 {
4859 }
4861 /* If GOT entries took too much space, wrap some of them around.
4862 This may well cause gad->min to become lower than wrapmin. This
4863 will cause a relocation overflow later on, so we don't have to
4864 report it here . */
4866 {
4869 }
4871 /* Add TLS descriptors. */
4876 /* If TLS descriptors took too much space, wrap an integral number
4877 of them around. */
4879 {
4887 }
4889 /* If there is space left and we have function descriptors
4890 referenced in PLT entries that could take advantage of shorter
4891 offsets, place them now. */
4893 {
4894 bfd_vma fds;
4898 else
4905 }
4907 /* If there is more space left, try to place some more function
4908 descriptors for PLT entries. */
4910 {
4911 bfd_vma fds;
4915 else
4922 }
4924 /* If there is space left and we have TLS descriptors referenced in
4925 PLT entries that could take advantage of shorter offsets, place
4926 them now. */
4928 {
4929 bfd_vma tlsds;
4933 else
4939 }
4941 /* If there is more space left, try to place some more TLS
4942 descriptors for PLT entries. Although we could try to fit an
4943 additional TLS descriptor with half of it just before before the
4944 wrap point and another right past the wrap point, this might
4945 cause us to run out of space for the next region, so don't do
4946 it. */
4948 {
4949 bfd_vma tlsds;
4953 else
4959 }
4961 /* If odd was initially computed as an offset past the wrap point,
4962 wrap it around. */
4966 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4967 before returning, so do it here too. This guarantees that,
4968 should cur and fdcur meet at the wrap point, they'll both be
4969 equal to min. */
4973 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4979 }
4981 /* Compute the location of the next GOT entry, given the allocation
4982 data for a range. */
4986 {
4987 bfd_signed_vma ret;
4990 {
4991 /* If there was an odd word left behind, use it. */
4994 }
4995 else
4996 {
4997 /* Otherwise, use the word pointed to by cur, reserve the next
4998 as an odd word, and skip to the next pair of words, possibly
4999 wrapping around. */
5005 }
5008 }
5010 /* Compute the location of the next function descriptor entry in the
5011 GOT, given the allocation data for a range. */
5015 {
5016 /* If we're at the bottom, wrap around, and only then allocate the
5017 next pair of words. */
5021 }
5023 /* Compute the location of the next TLS descriptor entry in the GOT,
5024 given the allocation data for a range. */
5027 {
5028 bfd_signed_vma ret;
5034 /* If we're at the top of the region, wrap around to the bottom. */
5039 }
5041 /* Assign GOT offsets for every GOT entry and function descriptor.
5042 Doing everything in a single pass is tricky. */
5044 static int
5046 {
5067 {
5070 }
5074 {
5077 }
5079 {
5082 }
5096 {
5099 }
5103 {
5106 }
5108 {
5111 }
5116 }
5118 /* Assign GOT offsets to private function descriptors used by PLT
5119 entries (or referenced by 32-bit offsets), as well as PLT entries
5120 and lazy PLT entries. */
5122 static int
5124 {
5132 {
5135 /* We use the section's raw size to mark the location of the
5136 next PLT entry. */
5139 /* Figure out the length of this PLT entry based on the
5140 addressing mode we need to reach the function descriptor. */
5148 else
5152 }
5155 {
5158 /* If this entry is the one that gets the resolver stub, account
5159 for the additional instruction. */
5163 }
5166 {
5169 entry->tlsplt_entry
5175 {
5177 /* FIXME: here we use the size of the TLS section
5178 as an upper bound for the value of the TLS
5179 symbol, because we may not know the exact value
5180 yet. If we get it wrong, we'll just waste a
5181 word in the PLT, and we should never get even
5182 close to 32 KiB of TLS anyway. */
5187 else
5189 }
5191 {
5198 else
5200 }
5201 else
5202 {
5211 else
5213 }
5216 }
5219 }
5221 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5222 _frvfdpic_assign_plt_entries. */
5224 static int
5226 {
5239 }
5241 /* Follow indirect and warning hash entries so that each got entry
5242 points to the final symbol definition. P must point to a pointer
5243 to the hash table we're traversing. Since this traversal may
5244 modify the hash table, we set this pointer to NULL to indicate
5245 we've made a potentially-destructive change to the hash table, so
5246 the traversal must be restarted. */
5247 static int
5249 {
5254 {
5266 NO_INSERT);
5269 {
5270 /* Merge the two entries. */
5274 }
5278 /* If we can't find this entry with the new bfd hash, re-insert
5279 it, and get the traversal restarted. */
5281 {
5286 /* Abort the traversal, since the whole table may have
5287 moved, and leave it up to the parent to restart the
5288 process. */
5291 }
5292 }
5295 }
5297 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5298 section and the rofixup section. Assign locations for GOT and PLT
5299 entries. */
5301 static bfd_boolean
5304 {
5305 bfd_signed_vma odd;
5314 /* Compute the total size taken by entries in the 12-bit and 16-bit
5315 ranges, to tell how many PLT function descriptors we can bring
5316 into the 12-bit range without causing the 16-bit range to
5317 overflow. */
5323 else
5326 {
5329 }
5330 else
5335 /* Determine the ranges of GOT offsets that we can use for each
5336 range of addressing modes. */
5339 odd,
5343 limit,
5345 tlslimit,
5349 odd,
5361 odd,
5374 /* Now assign (most) GOT offsets. */
5376 gpinfop);
5380 /* If an odd word is the last word of the GOT, we don't need this
5381 word to be part of the GOT. */
5387 {
5390 }
5391 /* This will be non-NULL during relaxation. The assumption is that
5392 the size of one of these sections will never grow, only shrink,
5393 so we can use the larger buffer we allocated before. */
5395 {
5401 }
5404 /* Subtract the number of lzplt entries, since those will generate
5405 relocations in the pltrel section. */
5409 else
5414 {
5420 }
5426 {
5432 }
5435 {
5442 {
5448 }
5449 }
5451 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5452 such that there's room for the additional instruction needed to
5453 call the resolver. Since _frvfdpic_assign_got_entries didn't
5454 account for them, our block size is 4 bytes smaller than the real
5455 block size. */
5457 {
5461 }
5463 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5464 actually assign lazy PLT entries addresses. */
5467 /* Save information that we're going to need to generate GOT and PLT
5468 entries. */
5479 /* Allocate a ret statement at plt_initial_offset, to be used by
5480 locally-resolved TLS descriptors. */
5485 gpinfop);
5487 /* Allocate the PLT section contents only after
5488 _frvfdpic_assign_plt_entries has a chance to add the size of the
5489 non-lazy PLT entries. */
5491 {
5495 {
5501 }
5502 }
5505 }
5507 /* Set the sizes of the dynamic sections. */
5509 static bfd_boolean
5512 {
5521 {
5522 /* Set the contents of the .interp section to the interpreter. */
5524 {
5529 }
5530 }
5536 {
5543 }
5548 /* Allocate space to save the summary information, we're going to
5549 use it if we're doing relaxations. */
5556 {
5573 }
5576 }
5578 static bfd_boolean
5581 {
5583 {
5586 /* Force a PT_GNU_STACK segment to be created. */
5590 /* Define __stacksize if it's not defined yet. */
5596 {
5609 /* This one must NOT be hidden. */
5610 }
5611 }
5614 }
5616 /* Check whether any of the relocations was optimized away, and
5617 subtract it from the relocation or fixup count. */
5618 static bfd_boolean
5623 {
5637 /* Now examine each relocation. */
5639 {
5657 else
5658 {
5663 }
5669 else
5686 }
5689 }
5691 static bfd_boolean
5695 {
5700 /* Account for relaxation of .eh_frame section. */
5703 {
5707 }
5710 {
5717 /* Clear GOT and PLT assignments. */
5719 _frvfdpic_reset_got_plt_entries,
5720 NULL);
5724 }
5727 }
5729 /* Look for opportunities to relax TLS relocations. We can assume
5730 we're linking the main executable or a static-tls library, since
5731 otherwise we wouldn't have got here. */
5733 static int
5735 {
5742 }
5744 static bfd_boolean
5747 {
5750 /* If we return early, we didn't change anything. */
5753 /* We'll do our thing when requested to relax the GOT section. */
5757 /* We can only relax when linking the main executable or a library
5758 that can't be dlopened. */
5762 /* If there isn't a TLS section for this binary, we can't do
5763 anything about its TLS relocations (it probably doesn't have
5764 any. */
5771 /* Now look for opportunities to relax, adjusting the GOT usage
5772 as needed. */
5774 _frvfdpic_relax_got_plt_entries,
5777 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5780 {
5781 /* Clear GOT and PLT assignments. */
5783 _frvfdpic_reset_got_plt_entries,
5784 NULL);
5786 /* The owner of the TLS section is the output bfd. There should
5787 be a better way to get to it. */
5792 /* Repeat until we don't make any further changes. We could fail to
5793 introduce changes in a round if, for example, the 12-bit range is
5794 full, but we later release some space by getting rid of TLS
5795 descriptors in it. We have to repeat the whole process because
5796 we might have changed the size of a section processed before this
5797 one. */
5799 }
5802 }
5804 static bfd_boolean
5807 {
5812 /* objcopy and strip preserve what's already there using
5813 elf32_frvfdpic_copy_private_bfd_data (). */
5822 {
5825 /* Obtain the pointer to the __stacksize symbol. */
5829 {
5834 }
5836 /* Set the header p_memsz from the symbol value. We
5837 intentionally ignore the symbol section. */
5840 else
5844 }
5847 }
5849 /* Fill in code and data in dynamic sections. */
5851 static bfd_boolean
5854 {
5855 /* Nothing to be done for non-FDPIC. */
5857 }
5859 static bfd_boolean
5862 {
5869 {
5871 }
5873 {
5879 {
5891 {
5892 error:
5896 }
5903 {
5904 bfd_vma value =
5913 }
5914 }
5915 }
5917 {
5921 }
5925 {
5937 {
5938 Elf_Internal_Dyn dyn;
5943 {
5965 }
5966 }
5967 }
5970 }
5972 /* Adjust a symbol defined by a dynamic object and referenced by a
5973 regular object. */
5975 static bfd_boolean
5976 elf32_frvfdpic_adjust_dynamic_symbol
5979 {
5984 /* Make sure we know what is going on here. */
5991 /* If this is a weak symbol, and there is a real definition, the
5992 processor independent code will have arranged for us to see the
5993 real definition first, and we can just use the same value. */
5995 {
6000 }
6003 }
6005 /* Perform any actions needed for dynamic symbols. */
6007 static bfd_boolean
6008 elf32_frvfdpic_finish_dynamic_symbol
6013 {
6015 }
6017 /* Decide whether to attempt to turn absptr or lsda encodings in
6018 shared libraries into pcrel within the given input section. */
6020 static bfd_boolean
6021 frvfdpic_elf_use_relative_eh_frame
6025 {
6026 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
6028 }
6030 /* Adjust the contents of an eh_frame_hdr section before they're output. */
6032 static bfd_byte
6038 {
6050 == (_frvfdpic_osec_to_segment
6059 }
6061 /* Look through the relocs for a section during the first phase.
6063 Besides handling virtual table relocs for gc, we have to deal with
6064 all sorts of PIC-related relocations. We describe below the
6065 general plan on how to handle such relocations, even though we only
6066 collect information at this point, storing them in hash tables for
6067 perusal of later passes.
6069 32 relocations are propagated to the linker output when creating
6070 position-independent output. LO16 and HI16 relocations are not
6071 supposed to be encountered in this case.
6073 LABEL16 should always be resolvable by the linker, since it's only
6074 used by branches.
6076 LABEL24, on the other hand, is used by calls. If it turns out that
6077 the target of a call is a dynamic symbol, a PLT entry must be
6078 created for it, which triggers the creation of a private function
6079 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
6081 GPREL relocations require the referenced symbol to be in the same
6082 segment as _gp, but this can only be checked later.
6084 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
6085 exist. LABEL24 might as well, since it may require a PLT entry,
6086 that will require a got.
6088 Non-FUNCDESC GOT relocations require a GOT entry to be created
6089 regardless of whether the symbol is dynamic. However, since a
6090 global symbol that turns out to not be exported may have the same
6091 address of a non-dynamic symbol, we don't assign GOT entries at
6092 this point, such that we can share them in this case. A relocation
6093 for the GOT entry always has to be created, be it to offset a
6094 private symbol by the section load address, be it to get the symbol
6095 resolved dynamically.
6097 FUNCDESC GOT relocations require a GOT entry to be created, and
6098 handled as if a FUNCDESC relocation was applied to the GOT entry in
6099 an object file.
6101 FUNCDESC relocations referencing a symbol that turns out to NOT be
6102 dynamic cause a private function descriptor to be created. The
6103 FUNCDESC relocation then decays to a 32 relocation that points at
6104 the private descriptor. If the symbol is dynamic, the FUNCDESC
6105 relocation is propagated to the linker output, such that the
6106 dynamic linker creates the canonical descriptor, pointing to the
6107 dynamically-resolved definition of the function.
6109 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
6110 symbols that are assigned to the same segment as the GOT, but we
6111 can only check this later, after we know the complete set of
6112 symbols defined and/or exported.
6114 FUNCDESC GOTOFF relocations require a function descriptor to be
6115 created and, unless lazy binding is disabled or the symbol is not
6116 dynamic, a lazy PLT entry. Since we can't tell at this point
6117 whether a symbol is going to be dynamic, we have to decide later
6118 whether to create a lazy PLT entry or bind the descriptor directly
6119 to the private function.
6121 FUNCDESC_VALUE relocations are not supposed to be present in object
6122 files, but they may very well be simply propagated to the linker
6123 output, since they have no side effect.
6126 A function descriptor always requires a FUNCDESC_VALUE relocation.
6127 Whether it's in .plt.rel or not depends on whether lazy binding is
6128 enabled and on whether the referenced symbol is dynamic.
6130 The existence of a lazy PLT requires the resolverStub lazy PLT
6131 entry to be present.
6134 As for assignment of GOT, PLT and lazy PLT entries, and private
6135 descriptors, we might do them all sequentially, but we can do
6136 better than that. For example, we can place GOT entries and
6137 private function descriptors referenced using 12-bit operands
6138 closer to the PIC register value, such that these relocations don't
6139 overflow. Those that are only referenced with LO16 relocations
6140 could come next, but we may as well place PLT-required function
6141 descriptors in the 12-bit range to make them shorter. Symbols
6142 referenced with LO16/HI16 may come next, but we may place
6143 additional function descriptors in the 16-bit range if we can
6144 reliably tell that we've already placed entries that are ever
6145 referenced with only LO16. PLT entries are therefore generated as
6146 small as possible, while not introducing relocation overflows in
6147 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6148 generated before or after PLT entries, but not intermingled with
6149 them, such that we can have more lazy PLT entries in range for a
6150 branch to the resolverStub. The resolverStub should be emitted at
6151 the most distant location from the first lazy PLT entry such that
6152 it's still in range for a branch, or closer, if there isn't a need
6153 for so many lazy PLT entries. Additional lazy PLT entries may be
6154 emitted after the resolverStub, as long as branches are still in
6155 range. If the branch goes out of range, longer lazy PLT entries
6156 are emitted.
6158 We could further optimize PLT and lazy PLT entries by giving them
6159 priority in assignment to closer-to-gr17 locations depending on the
6160 number of occurrences of references to them (assuming a function
6161 that's called more often is more important for performance, so its
6162 PLT entry should be faster), or taking hints from the compiler.
6163 Given infinite time and money... :-) */
6165 static bfd_boolean
6171 {
6188 {
6195 else
6196 {
6201 }
6204 {
6234 /* Fall through. */
6242 {
6246 }
6248 {
6251 }
6253 {
6256 {
6263 }
6264 picrel
6268 }
6269 else
6280 }
6283 {
6293 /* Fall through. */
6381 /* This relocation describes the C++ object vtable hierarchy.
6382 Reconstruct it for later use during GC. */
6388 /* This relocation describes which C++ vtable entries are actually
6389 used. Record for later use during GC. */
6411 bad_reloc:
6416 }
6417 }
6420 }
6422 \f
6423 /* Return the machine subcode from the ELF e_flags header. */
6425 static int
6428 {
6430 {
6440 }
6443 }
6445 /* Set the right machine number for a FRV ELF file. */
6447 static bfd_boolean
6450 {
6454 }
6455 \f
6456 /* Function to set the ELF flag bits. */
6458 static bfd_boolean
6461 flagword flags;
6462 {
6466 }
6468 /* Copy backend specific data from one object module to another. */
6470 static bfd_boolean
6474 {
6485 /* Copy object attributes. */
6489 }
6491 /* Return true if the architecture described by elf header flag
6492 EXTENSION is an extension of the architecture described by BASE. */
6494 static bfd_boolean
6496 {
6500 /* CPU_GENERIC code can be merged with code for a specific
6501 architecture, in which case the result is marked as being
6502 for the specific architecture. Everything is therefore
6503 an extension of CPU_GENERIC. */
6516 }
6518 static bfd_boolean
6520 {
6534 /* Copy the stack size. */
6537 {
6542 {
6545 /* Rewrite the phdrs, since we're only called after they
6546 were first written. */
6554 }
6557 }
6560 }
6562 /* Merge backend specific data from an object file to the output
6563 object file when linking. */
6565 static bfd_boolean
6569 {
6583 #ifdef DEBUG
6587 #endif
6590 {
6593 }
6596 ;
6599 {
6600 /* Warn if different # of gprs are used. Note, 0 means nothing is
6601 said about the size of gprs. */
6605 ;
6608 ;
6613 else
6614 {
6616 {
6620 }
6623 {
6627 }
6628 }
6630 /* Warn if different # of fprs are used. Note, 0 means nothing is
6631 said about the size of fprs. */
6635 ;
6638 ;
6643 else
6644 {
6646 {
6651 }
6654 {
6659 }
6660 }
6662 /* Warn if different dword support was used. Note, 0 means nothing is
6663 said about the dword support. */
6667 ;
6670 ;
6675 else
6676 {
6678 {
6682 }
6685 {
6689 }
6690 }
6692 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6693 feature is used. */
6695 | EF_FRV_MEDIA
6696 | EF_FRV_MULADD
6699 /* If any module was compiled without -G0, clear the G0 bit. */
6703 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6707 /* We don't have to do anything if the pic flags are the same, or the new
6708 module(s) were compiled with -mlibrary-pic. */
6712 ;
6714 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6715 flags if any from the new module. */
6719 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6723 /* One module was compiled for pic and the other was not, see if we have
6724 had any relocations that are not pic-safe. */
6725 else
6726 {
6729 else
6730 {
6732 #ifndef FRV_NO_PIC_ERROR
6738 #endif
6739 }
6740 }
6742 /* Warn if different cpu is used (allow a specific cpu to override
6743 the generic cpu). */
6747 ;
6752 else
6753 {
6755 {
6766 }
6769 {
6780 }
6781 }
6783 /* Print out any mismatches from above. */
6785 {
6790 }
6792 /* Warn about any other mismatches */
6796 {
6802 }
6803 }
6805 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6809 /* Update the old flags now with changes made above. */
6817 {
6823 else
6827 }
6833 }
6835 \f
6836 bfd_boolean
6839 PTR ptr;
6840 {
6842 flagword flags;
6846 /* Print normal ELF private data. */
6853 {
6863 }
6866 {
6870 }
6873 {
6878 }
6881 {
6885 }
6916 }
6918 \f
6919 /* Support for core dump NOTE sections. */
6921 static bfd_boolean
6923 {
6928 {
6932 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6933 hardcoded offsets and sizes listed below (and contained within
6934 this lexical block) refer to fields in the target's elf_prstatus
6935 struct. */
6937 /* `pr_cursig' is at offset 12. */
6940 /* `pr_pid' is at offset 24. */
6943 /* `pr_reg' is at offset 72. */
6946 /* Most grok_prstatus implementations set `raw_size' to the size
6947 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6948 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6949 and `pr_interp_fdpic_loadmap', both of which (by design)
6950 immediately follow `pr_reg'. This will allow these fields to
6951 be viewed by GDB as registers.
6953 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6954 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6958 }
6960 /* Make a ".reg/999" section. */
6963 }
6965 static bfd_boolean
6967 {
6969 {
6973 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6976 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6980 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6983 }
6985 /* Note that for some reason, a spurious space is tacked
6986 onto the end of the args in some (at least one anyway)
6987 implementations, so strip it off if it exists. */
6989 {
6995 }
6998 }
6999 #define ELF_ARCH bfd_arch_frv
7000 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
7001 #define ELF_MAXPAGESIZE 0x1000
7003 #define TARGET_BIG_SYM bfd_elf32_frv_vec
7006 #define elf_info_to_howto frv_info_to_howto_rela
7007 #define elf_backend_relocate_section elf32_frv_relocate_section
7008 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
7009 #define elf_backend_check_relocs elf32_frv_check_relocs
7010 #define elf_backend_object_p elf32_frv_object_p
7011 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
7013 #define elf_backend_can_gc_sections 1
7014 #define elf_backend_rela_normal 1
7016 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
7017 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
7018 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
7019 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
7020 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
7021 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
7023 #define elf_backend_want_got_sym 1
7024 #define elf_backend_got_header_size 0
7025 #define elf_backend_want_got_plt 0
7026 #define elf_backend_plt_readonly 1
7027 #define elf_backend_want_plt_sym 0
7028 #define elf_backend_plt_header_size 0
7030 #define elf_backend_finish_dynamic_sections \
7031 elf32_frv_finish_dynamic_sections
7033 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
7034 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
7038 #undef ELF_MAXPAGESIZE
7039 #define ELF_MAXPAGESIZE 0x4000
7041 #undef TARGET_BIG_SYM
7042 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
7043 #undef TARGET_BIG_NAME
7045 #undef elf32_bed
7046 #define elf32_bed elf32_frvfdpic_bed
7048 #undef elf_info_to_howto_rel
7049 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
7051 #undef bfd_elf32_bfd_link_hash_table_create
7052 #define bfd_elf32_bfd_link_hash_table_create \
7053 frvfdpic_elf_link_hash_table_create
7054 #undef elf_backend_always_size_sections
7055 #define elf_backend_always_size_sections \
7056 elf32_frvfdpic_always_size_sections
7057 #undef elf_backend_modify_program_headers
7058 #define elf_backend_modify_program_headers \
7059 elf32_frvfdpic_modify_program_headers
7060 #undef bfd_elf32_bfd_copy_private_bfd_data
7061 #define bfd_elf32_bfd_copy_private_bfd_data \
7062 elf32_frvfdpic_copy_private_bfd_data
7064 #undef elf_backend_create_dynamic_sections
7065 #define elf_backend_create_dynamic_sections \
7066 elf32_frvfdpic_create_dynamic_sections
7067 #undef elf_backend_adjust_dynamic_symbol
7068 #define elf_backend_adjust_dynamic_symbol \
7069 elf32_frvfdpic_adjust_dynamic_symbol
7070 #undef elf_backend_size_dynamic_sections
7071 #define elf_backend_size_dynamic_sections \
7072 elf32_frvfdpic_size_dynamic_sections
7073 #undef bfd_elf32_bfd_relax_section
7074 #define bfd_elf32_bfd_relax_section \
7075 elf32_frvfdpic_relax_section
7076 #undef elf_backend_finish_dynamic_symbol
7077 #define elf_backend_finish_dynamic_symbol \
7078 elf32_frvfdpic_finish_dynamic_symbol
7079 #undef elf_backend_finish_dynamic_sections
7080 #define elf_backend_finish_dynamic_sections \
7081 elf32_frvfdpic_finish_dynamic_sections
7083 #undef elf_backend_discard_info
7084 #define elf_backend_discard_info \
7085 frvfdpic_elf_discard_info
7086 #undef elf_backend_can_make_relative_eh_frame
7087 #define elf_backend_can_make_relative_eh_frame \
7088 frvfdpic_elf_use_relative_eh_frame
7089 #undef elf_backend_can_make_lsda_relative_eh_frame
7090 #define elf_backend_can_make_lsda_relative_eh_frame \
7091 frvfdpic_elf_use_relative_eh_frame
7092 #undef elf_backend_encode_eh_address
7093 #define elf_backend_encode_eh_address \
7094 frvfdpic_elf_encode_eh_address
7096 #undef elf_backend_may_use_rel_p
7097 #define elf_backend_may_use_rel_p 1
7098 #undef elf_backend_may_use_rela_p
7099 #define elf_backend_may_use_rela_p 1
7100 /* We use REL for dynamic relocations only. */
7101 #undef elf_backend_default_use_rela_p
7102 #define elf_backend_default_use_rela_p 1
7104 #undef elf_backend_omit_section_dynsym
7105 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym