| blob | 6ce1b9f1143df64dade724d57d892d7846d80791 |
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 {
1404 else
1406 }
1407 }
1409 /* Generate relocation for GOT entry pointing to the symbol. */
1411 {
1415 /* If the symbol is dynamic but binds locally, use
1416 section+offset. */
1419 {
1422 else
1427 else
1429 }
1431 /* If we're linking an executable at a fixed address, we can
1432 omit the dynamic relocation as long as the symbol is local to
1433 this module. */
1437 {
1445 ->vma
1449 }
1450 else
1452 _bfd_elf_section_offset
1466 }
1468 /* Generate relocation for GOT entry pointing to a canonical
1469 function descriptor. */
1471 {
1478 {
1479 /* If the symbol is dynamic and there may be dynamic symbol
1480 resolution because we are, or are linked with, a shared
1481 library, emit a FUNCDESC relocation such that the dynamic
1482 linker will allocate the function descriptor. If the
1483 symbol needs a non-local function descriptor but binds
1484 locally (e.g., its visibility is protected, emit a
1485 dynamic relocation decayed to section+offset. */
1490 {
1496 }
1499 {
1504 {
1511 }
1512 }
1513 else
1514 {
1515 /* Otherwise, we know we have a private function descriptor,
1516 so reference it directly. */
1524 }
1526 /* If there is room for dynamic symbol resolution, emit the
1527 dynamic relocation. However, if we're linking an
1528 executable at a fixed location, we won't have emitted a
1529 dynamic symbol entry for the got section, so idx will be
1530 zero, which means we can and should compute the address
1531 of the private descriptor ourselves. */
1535 {
1542 ->output_offset
1545 }
1546 else
1549 _bfd_elf_section_offset
1559 }
1565 }
1567 /* Generate relocation to fill in a private function descriptor in
1568 the GOT. */
1570 {
1573 bfd_vma ofst;
1576 /* If the symbol is dynamic but binds locally, use
1577 section+offset. */
1580 {
1583 else
1588 else
1590 }
1592 /* If we're linking an executable at a fixed address, we can
1593 omit the dynamic relocation as long as the symbol is local to
1594 this module. */
1597 {
1603 {
1609 ->output_offset
1617 ->output_offset
1620 }
1621 }
1622 else
1623 {
1624 ofst =
1626 entry->lazyplt
1629 _bfd_elf_section_offset
1639 }
1641 /* If we've omitted the dynamic relocation, just emit the fixed
1642 addresses of the symbol and of the local GOT base offset. */
1644 {
1649 }
1651 {
1653 {
1660 }
1664 /* A function descriptor used for lazy or local resolving is
1665 initialized such that its high word contains the output
1666 section index in which the PLT entries are located, and
1667 the low word contains the address of the lazy PLT entry
1668 entry point, that must be within the memory region
1669 assigned to that section. */
1673 highword = _frvfdpic_osec_to_segment
1675 }
1676 else
1677 {
1678 /* A function descriptor for a local function gets the index
1679 of the section. For a non-local function, it's
1680 disregarded. */
1685 else
1686 highword = _frvfdpic_osec_to_segment
1688 }
1698 }
1700 /* Generate code for the PLT entry. */
1702 {
1708 /* Figure out what kind of PLT entry we need, depending on the
1709 location of the function descriptor within the GOT. */
1712 {
1713 /* lddi @(gr15, fd_entry), gr14 */
1716 plt_code);
1718 }
1719 else
1720 {
1723 {
1724 /* setlos lo(fd_entry), gr14 */
1726 0x9cfc0000
1728 plt_code);
1730 }
1731 else
1732 {
1733 /* sethi.p hi(fd_entry), gr14
1734 setlo lo(fd_entry), gr14 */
1736 0x1cf80000
1739 plt_code);
1742 0x9cf40000
1744 plt_code);
1746 }
1747 /* ldd @(gr14,gr15),gr14 */
1750 }
1751 /* jmpl @(gr14,gr0) */
1753 }
1755 /* Generate code for the lazy PLT entry. */
1757 {
1760 bfd_vma resolverStub_addr;
1771 {
1772 /* This is a lazy PLT entry that includes a resolver call. */
1773 /* ldd @(gr15,gr0), gr4
1774 jmpl @(gr4,gr0) */
1777 }
1778 else
1779 {
1780 /* bra resolverStub */
1782 0xc01a0000
1785 lzplt_code);
1786 }
1787 }
1789 /* Generate relocation for GOT entry holding the TLS offset. */
1791 {
1797 {
1798 /* If the symbol is dynamic but binds locally, use
1799 section+offset. */
1801 {
1804 else
1810 else
1812 }
1813 }
1815 /* *ABS*+addend is special for TLS relocations, use only the
1816 addend. */
1821 ;
1822 /* If we're linking an executable, we can entirely omit the
1823 dynamic relocation if the symbol is local to this module. */
1827 {
1830 }
1831 else
1832 {
1836 {
1838 {
1843 }
1846 }
1848 _bfd_elf_section_offset
1858 }
1864 }
1867 {
1871 /* If the symbol is dynamic but binds locally, use
1872 section+offset. */
1875 {
1878 else
1883 else
1885 }
1887 /* If we didn't set up a TLS offset entry, but we're linking an
1888 executable and the symbol binds locally, we can use the
1889 module offset in the TLS descriptor in relaxations. */
1899 {
1900 /* *ABS*+addend is special for TLS relocations, use only the
1901 addend for the TLS offset, and take the module id as
1902 0. */
1906 ;
1907 /* For other TLS symbols that bind locally, add the section
1908 TLS offset to the addend. */
1925 ->output_offset
1931 /* We've used one of the reserved fixups, so discount it so
1932 that we can check at the end that we've used them
1933 all. */
1936 /* While at that, make sure the ret instruction makes to the
1937 right location in the PLT. We could do it only when we
1938 got to 0, but since the check at the end will only print
1939 a warning, make sure we have the ret in place in case the
1940 warning is missed. */
1944 }
1945 else
1946 {
1950 {
1952 {
1957 }
1960 }
1963 _bfd_elf_section_offset
1978 }
1984 }
1986 /* Generate code for the get-TLS-offset PLT entry. */
1988 {
1995 {
1999 /* sec may be NULL when referencing an undefweak symbol
2000 while linking a static executable. */
2002 {
2005 }
2006 else
2007 {
2010 else
2016 else
2018 }
2020 /* *ABS*+addend is special for TLS relocations, use only the
2021 addend for the TLS offset, and take the module id as
2022 0. */
2026 ;
2027 /* For other TLS symbols that bind locally, add the section
2028 TLS offset to the addend. */
2034 {
2035 /* setlos lo(ad), gr9 */
2037 0x92fc0000
2038 | (ad
2040 plt_code);
2042 }
2043 else
2044 {
2045 /* sethi.p hi(ad), gr9
2046 setlo lo(ad), gr9 */
2048 0x12f80000
2051 plt_code);
2054 0x92f40000
2055 | (ad
2057 plt_code);
2059 }
2060 /* ret */
2062 }
2064 {
2065 /* Figure out what kind of PLT entry we need, depending on the
2066 location of the TLS descriptor within the GOT. */
2069 {
2070 /* ldi @(gr15, tlsoff_entry), gr9 */
2074 plt_code);
2076 }
2077 else
2078 {
2081 {
2082 /* setlos lo(tlsoff_entry), gr8 */
2084 0x90fc0000
2087 plt_code);
2089 }
2090 else
2091 {
2092 /* sethi.p hi(tlsoff_entry), gr8
2093 setlo lo(tlsoff_entry), gr8 */
2095 0x10f80000
2098 plt_code);
2101 0x90f40000
2104 plt_code);
2106 }
2107 /* ld @(gr15,gr8),gr9 */
2110 }
2111 /* ret */
2113 }
2114 else
2115 {
2118 /* Figure out what kind of PLT entry we need, depending on the
2119 location of the TLS descriptor within the GOT. */
2122 {
2123 /* lddi @(gr15, tlsdesc_entry), gr8 */
2127 plt_code);
2129 }
2130 else
2131 {
2134 {
2135 /* setlos lo(tlsdesc_entry), gr8 */
2137 0x90fc0000
2140 plt_code);
2142 }
2143 else
2144 {
2145 /* sethi.p hi(tlsdesc_entry), gr8
2146 setlo lo(tlsdesc_entry), gr8 */
2148 0x10f80000
2151 plt_code);
2154 0x90f40000
2157 plt_code);
2159 }
2160 /* ldd @(gr15,gr8),gr8 */
2163 }
2164 /* jmpl @(gr8,gr0) */
2166 }
2167 }
2170 }
2172 /* Handle an FRV small data reloc. */
2174 static bfd_reloc_status_type
2182 bfd_vma value;
2183 {
2184 bfd_vma insn;
2185 bfd_vma gp;
2209 }
2211 /* Handle an FRV small data reloc. for the u12 field. */
2213 static bfd_reloc_status_type
2221 bfd_vma value;
2222 {
2223 bfd_vma insn;
2224 bfd_vma gp;
2226 bfd_vma mask;
2244 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2251 }
2253 /* Handle an FRV ELF HI16 reloc. */
2255 static bfd_reloc_status_type
2260 bfd_vma value;
2261 {
2262 bfd_vma insn;
2277 }
2278 static bfd_reloc_status_type
2283 bfd_vma value;
2284 {
2285 bfd_vma insn;
2299 }
2301 /* Perform the relocation for the CALL label24 instruction. */
2303 static bfd_reloc_status_type
2309 bfd_vma value;
2310 {
2311 bfd_vma insn;
2312 bfd_vma label6;
2313 bfd_vma label18;
2315 /* The format for the call instruction is:
2317 0 000000 0001111 000000000000000000
2318 label6 opcode label18
2320 The branch calculation is: pc + (4*label24)
2321 where label24 is the concatenation of label6 and label18. */
2323 /* Grab the instruction. */
2344 }
2346 static bfd_reloc_status_type
2354 bfd_vma value;
2355 {
2356 bfd_vma insn;
2357 bfd_vma gp;
2379 }
2381 static bfd_reloc_status_type
2389 bfd_vma value;
2390 {
2391 bfd_vma insn;
2392 bfd_vma gp;
2415 }
2420 bfd_reloc_code_real_type code;
2421 {
2423 {
2434 /* Fall through. */
2572 }
2575 }
2579 {
2584 i++)
2595 }
2597 /* Set the howto pointer for an FRV ELF reloc. */
2599 static void
2604 {
2609 {
2621 }
2622 }
2624 /* Set the howto pointer for an FRV ELF REL reloc. */
2625 static void
2628 {
2633 {
2657 }
2658 }
2659 \f
2660 /* Perform a single relocation. By default we use the standard BFD
2661 routines, but a few relocs, we have to do them ourselves. */
2663 static bfd_reloc_status_type
2665 relocation)
2671 bfd_vma relocation;
2672 {
2676 }
2678 \f
2679 /* Relocate an FRV ELF section.
2681 The RELOCATE_SECTION function is called by the new ELF backend linker
2682 to handle the relocations for a section.
2684 The relocs are always passed as Rela structures; if the section
2685 actually uses Rel structures, the r_addend field will always be
2686 zero.
2688 This function is responsible for adjusting the section contents as
2689 necessary, and (if using Rela relocs and generating a relocatable
2690 output file) adjusting the reloc addend as necessary.
2692 This function does not have to worry about setting the reloc
2693 address or the reloc symbol index.
2695 LOCAL_SYMS is a pointer to the swapped in local symbols.
2697 LOCAL_SECTIONS is an array giving the section in the input file
2698 corresponding to the st_shndx field of each local symbol.
2700 The global hash table entry for the global symbols can be found
2701 via elf_sym_hashes (input_bfd).
2703 When generating relocatable output, this function must handle
2704 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2705 going to be the section symbol corresponding to the output
2706 section, which means that the addend must be adjusted
2707 accordingly. */
2709 static bfd_boolean
2720 {
2740 else
2746 else
2752 else
2757 else
2761 {
2767 bfd_vma relocation;
2768 bfd_reloc_status_type r;
2788 {
2793 name = bfd_elf_string_from_elf_section
2796 }
2797 else
2798 {
2799 bfd_boolean warned;
2800 bfd_boolean unresolved_reloc;
2807 }
2810 {
2811 /* For relocs against symbols from removed linkonce sections,
2812 or sections discarded by a linker script, we just want the
2813 section contents zeroed. Avoid any special processing. */
2818 }
2828 {
2831 }
2834 {
2874 else
2875 /* In order to find the entry we created before, we must
2876 use the original addend, not the one that may have been
2877 modified by _bfd_elf_rela_local_sym(). */
2887 {
2892 }
2897 non_fdpic:
2900 {
2905 }
2907 }
2910 {
2933 }
2935 /* Try to apply TLS relaxations. */
2938 {
2940 #define LOCAL_EXEC_P(info, picrel) \
2941 ((info)->executable \
2942 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2943 #define INITIAL_EXEC_P(info, picrel) \
2944 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2945 && (picrel)->tlsoff_entry)
2947 #define IN_RANGE_FOR_OFST12_P(value) \
2948 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2949 #define IN_RANGE_FOR_SETLOS_P(value) \
2950 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2951 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2952 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2954 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2955 (LOCAL_EXEC_P ((info), (picrel)) \
2956 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2957 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2958 (INITIAL_EXEC_P ((info), (picrel)) \
2959 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2961 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2962 (LOCAL_EXEC_P ((info), (picrel)))
2963 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2964 (INITIAL_EXEC_P ((info), (picrel)))
2966 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2967 (LOCAL_EXEC_P ((info), (picrel)) \
2968 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2973 /* Is this a call instruction? */
2975 {
2981 }
2985 {
2986 /* Replace the call instruction (except the packing bit)
2987 with setlos #tlsmofflo(symbol+offset), gr9. */
2995 }
2998 {
2999 /* Replace the call instruction (except the packing bit)
3000 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
3008 }
3015 /* Is this an lddi instruction? */
3017 {
3023 }
3028 info))
3029 {
3030 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3031 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3032 Preserve the packing bit. */
3042 }
3046 {
3047 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3048 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3049 Preserve the packing bit. */
3059 }
3062 {
3063 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3064 with ldi @(grB, #gottlsoff12(symbol+offset),
3065 gr<C+1>. Preserve the packing bit. If gottlsoff12
3066 overflows, we'll error out, but that's sort-of ok,
3067 since we'd started with gottlsdesc12, that's actually
3068 more demanding. Compiling with -fPIE instead of
3069 -fpie would fix it; linking with --relax should fix
3070 it as well. */
3079 }
3086 /* Is this a sethi instruction? */
3088 {
3094 }
3100 {
3101 /* Replace sethi with a nop. Preserve the packing bit. */
3106 /* Nothing to relocate. */
3108 }
3111 {
3112 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3116 }
3123 /* Is this a setlo or setlos instruction? */
3125 {
3132 }
3138 {
3139 /* Replace setlo/setlos with a nop. Preserve the
3140 packing bit. */
3145 /* Nothing to relocate. */
3147 }
3150 {
3151 /* If the corresponding sethi (if it exists) decayed
3152 to a nop, make sure this becomes (or already is) a
3153 setlos, not setlo. */
3155 {
3158 }
3160 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3164 }
3171 /* Is this an ldd instruction? */
3173 {
3179 }
3184 info))
3185 {
3186 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3187 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3188 Preserve the packing bit. */
3198 }
3202 {
3203 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3204 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3205 Preserve the packing bit. */
3215 }
3219 {
3220 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3221 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3222 Preserve the packing bit. */
3232 }
3235 {
3236 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3237 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3238 Preserve the packing bit. */
3244 /* #tlsoff(symbol+offset) is just a relaxation
3245 annotation, so there's nothing left to
3246 relocate. */
3248 }
3255 /* Is this a calll or callil instruction? */
3257 {
3264 }
3269 info))
3270 {
3271 /* Replace calll with a nop. Preserve the packing bit. */
3276 /* Nothing to relocate. */
3278 }
3282 {
3283 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3284 Preserve the packing bit. */
3292 }
3295 {
3296 /* Replace calll with a nop. Preserve the packing bit. */
3301 /* Nothing to relocate. */
3303 }
3310 /* Is this an ldi instruction? */
3312 {
3318 }
3322 {
3323 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3324 with setlos #tlsmofflo(symbol+offset), grC.
3325 Preserve the packing bit. */
3333 }
3340 /* Is this a sethi instruction? */
3342 {
3348 }
3354 {
3355 /* Replace sethi with a nop. Preserve the packing bit. */
3360 /* Nothing to relocate. */
3362 }
3369 /* Is this a setlo or setlos instruction? */
3371 {
3378 }
3384 {
3385 /* Replace setlo/setlos with a nop. Preserve the
3386 packing bit. */
3391 /* Nothing to relocate. */
3393 }
3400 /* Is this an ld instruction? */
3402 {
3408 }
3412 {
3413 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3414 with setlos #tlsmofflo(symbol+offset), grC.
3415 Preserve the packing bit. */
3423 }
3427 {
3428 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3429 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3430 Preserve the packing bit. */
3438 }
3445 /* Is this a sethi instruction? */
3447 {
3453 }
3456 info))
3457 {
3458 /* Replace sethi with a nop. Preserve the packing bit. */
3463 /* Nothing to relocate. */
3465 }
3472 /* Is this a setlo or setlos instruction? */
3474 {
3481 }
3484 info))
3485 /* If the corresponding sethi (if it exists) decayed
3486 to a nop, make sure this becomes (or already is) a
3487 setlos, not setlo. */
3488 {
3491 }
3495 /*
3496 There's nothing to relax in these:
3497 R_FRV_TLSDESC_VALUE
3498 R_FRV_TLSOFF
3499 R_FRV_TLSMOFF12
3500 R_FRV_TLSMOFFHI
3501 R_FRV_TLSMOFFLO
3502 R_FRV_TLSMOFF
3503 */
3507 }
3510 {
3516 {
3521 }
3522 /* We don't want to warn on calls to undefined weak symbols,
3523 as calls to them must be protected by non-NULL tests
3524 anyway, and unprotected calls would invoke undefined
3525 behavior. */
3529 else
3569 {
3575 {
3576 /* If the symbol is dynamic and there may be dynamic
3577 symbol resolution because we are or are linked with a
3578 shared library, emit a FUNCDESC relocation such that
3579 the dynamic linker will allocate the function
3580 descriptor. If the symbol needs a non-local function
3581 descriptor but binds locally (e.g., its visibility is
3582 protected, emit a dynamic relocation decayed to
3583 section+offset. */
3587 {
3592 }
3594 {
3596 {
3601 }
3603 }
3604 else
3605 {
3606 /* Otherwise, we know we have a private function
3607 descriptor, so reference it directly. */
3615 }
3617 /* If there is room for dynamic symbol resolution, emit
3618 the dynamic relocation. However, if we're linking an
3619 executable at a fixed location, we won't have emitted a
3620 dynamic symbol entry for the got section, so idx will
3621 be zero, which means we can and should compute the
3622 address of the private descriptor ourselves. */
3625 {
3630 {
3631 bfd_vma offset;
3634 input_section
3636 {
3642 }
3644 offset = _bfd_elf_section_offset
3650 frvfdpic_gotfixup_section
3652 offset + input_section
3655 picrel);
3656 }
3657 }
3661 {
3662 bfd_vma offset;
3665 input_section
3667 {
3673 }
3675 offset = _bfd_elf_section_offset
3682 offset + input_section
3686 }
3687 else
3689 }
3691 /* We want the addend in-place because dynamic
3692 relocations are REL. Setting relocation to it should
3693 arrange for it to be installed. */
3695 }
3701 {
3704 }
3705 /* Fall through. */
3707 {
3711 /* If the symbol is dynamic but binds locally, use
3712 section+offset. */
3714 {
3716 {
3721 }
3723 }
3724 else
3725 {
3728 else
3736 else
3738 }
3740 /* If we're linking an executable at a fixed address, we
3741 can omit the dynamic relocation as long as the symbol
3742 is defined in the current link unit (which is implied
3743 by its output section not being NULL). */
3746 {
3753 {
3755 input_section
3757 {
3763 }
3765 {
3766 bfd_vma offset = _bfd_elf_section_offset
3771 {
3773 frvfdpic_gotfixup_section
3775 offset + input_section
3778 picrel);
3780 _frvfdpic_add_rofixup
3783 offset
3786 }
3787 }
3788 }
3789 }
3790 else
3791 {
3795 {
3796 bfd_vma offset;
3799 input_section
3801 {
3807 }
3809 offset = _bfd_elf_section_offset
3816 offset + 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. */
4153 {
4156 {
4160 }
4163 }
4164 \f
4165 /* Hook called by the linker routine which adds symbols from an object
4166 file. We use it to put .comm items in .scomm, and not .comm. */
4168 static bfd_boolean
4177 {
4181 {
4182 /* Common symbols less than or equal to -G nn bytes are
4183 automatically put into .sbss. */
4188 {
4190 (SEC_ALLOC
4191 | SEC_IS_COMMON
4195 }
4199 }
4202 }
4204 /* We need dynamic symbols for every section, since segments can
4205 relocate independently. */
4206 static bfd_boolean
4209 ATTRIBUTE_UNUSED,
4211 {
4213 {
4216 /* If sh_type is yet undecided, assume it could be
4217 SHT_PROGBITS/SHT_NOBITS. */
4221 /* There shouldn't be section relative relocations
4222 against any other section. */
4225 }
4226 }
4228 /* Create a .got section, as well as its additional info field. This
4229 is almost entirely copied from
4230 elflink.c:_bfd_elf_create_got_section(). */
4232 static bfd_boolean
4234 {
4243 /* This function may be called more than once. */
4248 /* Machine specific: although pointers are 32-bits wide, we want the
4249 GOT to be aligned to a 64-bit boundary, such that function
4250 descriptors in it can be accessed with 64-bit loads and
4251 stores. */
4264 {
4269 }
4272 {
4273 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4274 (or .got.plt) section. We don't do this in the linker script
4275 because we don't want to define the symbol if we are not creating
4276 a global offset table. */
4282 /* Machine-specific: we want the symbol for executables as
4283 well. */
4286 }
4288 /* The first bit of the global offset table is the header. */
4291 /* This is the machine-specific part. Create and initialize section
4292 data for the got. */
4294 {
4297 frvfdpic_relocs_info_hash,
4298 frvfdpic_relocs_info_eq,
4311 /* Machine-specific. */
4321 }
4322 else
4323 {
4326 }
4328 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4329 turns out that we're linking with a different linker script, the
4330 linker script will override it. */
4341 /* Machine-specific: we want the symbol for executables as well. */
4348 /* FDPIC supports Thread Local Storage, and this may require a
4349 procedure linkage table for TLS PLT entries. */
4351 /* This is mostly copied from
4352 elflink.c:_bfd_elf_create_dynamic_sections(). */
4365 /* FRV-specific: remember it. */
4368 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4369 .plt section. */
4371 {
4377 }
4379 /* FRV-specific: we want rel relocations for the plt. */
4385 /* FRV-specific: remember it. */
4389 }
4391 /* Make sure the got and plt sections exist, and that our pointers in
4392 the link hash table point to them. */
4394 static bfd_boolean
4396 {
4397 /* This is mostly copied from
4398 elflink.c:_bfd_elf_create_dynamic_sections(). */
4399 flagword flags;
4406 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4407 .rel[a].bss sections. */
4409 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4410 way. */
4414 /* FRV-specific: make sure we created everything we wanted. */
4421 {
4422 /* The .dynbss section is a place to put symbols which are defined
4423 by dynamic objects, are referenced by regular objects, and are
4424 not functions. We must allocate space for them in the process
4425 image and use a R_*_COPY reloc to tell the dynamic linker to
4426 initialize them at run time. The linker script puts the .dynbss
4427 section into the .bss section of the final image. */
4433 /* The .rel[a].bss section holds copy relocs. This section is not
4434 normally needed. We need to create it here, though, so that the
4435 linker will map it to an output section. We can't just create it
4436 only if we need it, because we will not know whether we need it
4437 until we have seen all the input files, and the first time the
4438 main linker code calls BFD after examining all the input files
4439 (size_dynamic_sections) the input sections have already been
4440 mapped to the output sections. If the section turns out not to
4441 be needed, we can discard it later. We will never need this
4442 section when generating a shared object, since they do not use
4443 copy relocs. */
4445 {
4453 }
4454 }
4457 }
4459 /* Compute the total GOT and PLT size required by each symbol in each
4460 range. Symbols may require up to 4 words in the GOT: an entry
4461 pointing to the symbol, an entry pointing to its function
4462 descriptor, and a private function descriptors taking two
4463 words. */
4465 static void
4468 {
4469 /* Allocate space for a GOT entry pointing to the symbol. */
4476 else
4480 /* Allocate space for a GOT entry pointing to the function
4481 descriptor. */
4488 else
4492 /* Decide whether we need a PLT entry, a function descriptor in the
4493 GOT, and a lazy PLT entry for this symbol. */
4507 /* Allocate space for a function descriptor. */
4516 else
4522 }
4524 /* Compute the total GOT size required by each TLS symbol in each
4525 range. Symbols may require up to 5 words in the GOT: an entry
4526 holding the TLS offset for the symbol, and an entry with a full TLS
4527 descriptor taking 4 words. */
4529 static void
4532 bfd_boolean subtract)
4533 {
4536 /* Allocate space for a GOT entry with the TLS offset of the
4537 symbol. */
4544 else
4548 /* If there's any TLSOFF relocation, mark the output file as not
4549 suitable for dlopening. This mark will remain even if we relax
4550 all such relocations, but this is not a problem, since we'll only
4551 do so for executables, and we definitely don't want anyone
4552 dlopening executables. */
4556 /* Allocate space for a TLS descriptor. */
4565 else
4568 }
4570 /* Compute the number of dynamic relocations and fixups that a symbol
4571 requires, and add (or subtract) from the grand and per-symbol
4572 totals. */
4574 static void
4577 bfd_boolean subtract)
4578 {
4582 {
4586 /* In the executable, TLS relocations to symbols that bind
4587 locally (including those that resolve to global TLS offsets)
4588 are resolved immediately, without any need for fixups or
4589 dynamic relocations. In shared libraries, however, we must
4590 emit dynamic relocations even for local symbols, because we
4591 don't know the module id the library is going to get at
4592 run-time, nor its TLS base offset. */
4597 }
4598 else
4599 {
4601 {
4607 }
4608 else
4609 {
4612 }
4616 {
4620 }
4621 else
4623 }
4626 {
4630 }
4637 }
4639 /* Look for opportunities to relax TLS relocations. We can assume
4640 we're linking the main executable or a static-tls library, since
4641 otherwise we wouldn't have got here. When relaxing, we have to
4642 first undo any previous accounting of TLS uses of fixups, dynamic
4643 relocations, GOT and PLT entries. */
4645 static void
4648 bfd_boolean relaxing)
4649 {
4656 {
4658 {
4662 }
4664 /* When linking an executable, we can always decay GOTTLSDESC to
4665 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4666 When linking a static-tls shared library, using TLSMOFF is
4667 not an option, but we can still use GOTTLSOFF. When decaying
4668 to GOTTLSOFF, we must keep the GOT entry in range. We know
4669 it has to fit because we'll be trading the 4 words of hte TLS
4670 descriptor for a single word in the same range. */
4674 {
4678 }
4681 }
4683 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4684 main executable. We have to check whether the symbol's TLSOFF is
4685 in range for a setlos. For symbols with a hash entry, we can
4686 determine exactly what to do; for others locals, we don't have
4687 addresses handy, so we use the size of the TLS section as an
4688 approximation. If we get it wrong, we'll retain a GOT entry
4689 holding the TLS offset (without dynamic relocations or fixups),
4690 but we'll still optimize away the loads from it. Since TLS sizes
4691 are generally very small, it's probably not worth attempting to
4692 do better than this. */
4698 /* The above may hold for an undefweak TLS symbol, so make
4699 sure we don't have this case before accessing def.value
4700 and def.section. */
4712 {
4714 {
4718 }
4722 }
4724 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4725 have a #gottlsoff12 relocation for this entry, or if we can fit
4726 one more in the 12-bit (and 16-bit) ranges. */
4729 || (relaxing
4734 {
4736 {
4740 }
4744 }
4747 {
4750 }
4753 }
4755 /* Compute the total GOT and PLT size required by each symbol in each range. *
4756 Symbols may require up to 4 words in the GOT: an entry pointing to
4757 the symbol, an entry pointing to its function descriptor, and a
4758 private function descriptors taking two words. */
4760 static int
4762 {
4770 else
4771 {
4774 }
4777 }
4779 /* Determine the positive and negative ranges to be used by each
4780 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4781 double-word boundary, are the minimum (negative) and maximum
4782 (positive) GOT offsets already used by previous ranges, except for
4783 an ODD entry that may have been left behind. GOT and FD indicate
4784 the size of GOT entries and function descriptors that must be
4785 placed within the range from -WRAP to WRAP. If there's room left,
4786 up to FDPLT bytes should be reserved for additional function
4787 descriptors. */
4791 bfd_signed_vma fdcur,
4792 bfd_signed_vma odd,
4793 bfd_signed_vma cur,
4794 bfd_vma got,
4795 bfd_vma fd,
4796 bfd_vma fdplt,
4797 bfd_vma tlsd,
4798 bfd_vma tlsdplt,
4799 bfd_vma wrap)
4800 {
4804 /* Start at the given initial points. */
4808 /* If we had an incoming odd word and we have any got entries that
4809 are going to use it, consume it, otherwise leave gad->odd at
4810 zero. We might force gad->odd to zero and return the incoming
4811 odd such that it is used by the next range, but then GOT entries
4812 might appear to be out of order and we wouldn't be able to
4813 shorten the GOT by one word if it turns out to end with an
4814 unpaired GOT entry. */
4816 {
4820 }
4821 else
4824 /* If we're left with an unpaired GOT entry, compute its location
4825 such that we can return it. Otherwise, if got doesn't require an
4826 odd number of words here, either odd was already zero in the
4827 block above, or it was set to zero because got was non-zero, or
4828 got was already zero. In the latter case, we want the value of
4829 odd to carry over to the return statement, so we don't want to
4830 reset odd unless the condition below is true. */
4832 {
4835 }
4837 /* Compute the tentative boundaries of this range. */
4842 /* If function descriptors took too much space, wrap some of them
4843 around. */
4845 {
4848 }
4850 /* If GOT entries took too much space, wrap some of them around.
4851 This may well cause gad->min to become lower than wrapmin. This
4852 will cause a relocation overflow later on, so we don't have to
4853 report it here . */
4855 {
4858 }
4860 /* Add TLS descriptors. */
4865 /* If TLS descriptors took too much space, wrap an integral number
4866 of them around. */
4868 {
4876 }
4878 /* If there is space left and we have function descriptors
4879 referenced in PLT entries that could take advantage of shorter
4880 offsets, place them now. */
4882 {
4883 bfd_vma fds;
4887 else
4894 }
4896 /* If there is more space left, try to place some more function
4897 descriptors for PLT entries. */
4899 {
4900 bfd_vma fds;
4904 else
4911 }
4913 /* If there is space left and we have TLS descriptors referenced in
4914 PLT entries that could take advantage of shorter offsets, place
4915 them now. */
4917 {
4918 bfd_vma tlsds;
4922 else
4928 }
4930 /* If there is more space left, try to place some more TLS
4931 descriptors for PLT entries. Although we could try to fit an
4932 additional TLS descriptor with half of it just before before the
4933 wrap point and another right past the wrap point, this might
4934 cause us to run out of space for the next region, so don't do
4935 it. */
4937 {
4938 bfd_vma tlsds;
4942 else
4948 }
4950 /* If odd was initially computed as an offset past the wrap point,
4951 wrap it around. */
4955 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4956 before returning, so do it here too. This guarantees that,
4957 should cur and fdcur meet at the wrap point, they'll both be
4958 equal to min. */
4962 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4968 }
4970 /* Compute the location of the next GOT entry, given the allocation
4971 data for a range. */
4975 {
4976 bfd_signed_vma ret;
4979 {
4980 /* If there was an odd word left behind, use it. */
4983 }
4984 else
4985 {
4986 /* Otherwise, use the word pointed to by cur, reserve the next
4987 as an odd word, and skip to the next pair of words, possibly
4988 wrapping around. */
4994 }
4997 }
4999 /* Compute the location of the next function descriptor entry in the
5000 GOT, given the allocation data for a range. */
5004 {
5005 /* If we're at the bottom, wrap around, and only then allocate the
5006 next pair of words. */
5010 }
5012 /* Compute the location of the next TLS descriptor entry in the GOT,
5013 given the allocation data for a range. */
5016 {
5017 bfd_signed_vma ret;
5023 /* If we're at the top of the region, wrap around to the bottom. */
5028 }
5030 /* Assign GOT offsets for every GOT entry and function descriptor.
5031 Doing everything in a single pass is tricky. */
5033 static int
5035 {
5056 {
5059 }
5063 {
5066 }
5068 {
5071 }
5085 {
5088 }
5092 {
5095 }
5097 {
5100 }
5105 }
5107 /* Assign GOT offsets to private function descriptors used by PLT
5108 entries (or referenced by 32-bit offsets), as well as PLT entries
5109 and lazy PLT entries. */
5111 static int
5113 {
5121 {
5124 /* We use the section's raw size to mark the location of the
5125 next PLT entry. */
5128 /* Figure out the length of this PLT entry based on the
5129 addressing mode we need to reach the function descriptor. */
5137 else
5141 }
5144 {
5147 /* If this entry is the one that gets the resolver stub, account
5148 for the additional instruction. */
5152 }
5155 {
5158 entry->tlsplt_entry
5164 {
5166 /* FIXME: here we use the size of the TLS section
5167 as an upper bound for the value of the TLS
5168 symbol, because we may not know the exact value
5169 yet. If we get it wrong, we'll just waste a
5170 word in the PLT, and we should never get even
5171 close to 32 KiB of TLS anyway. */
5176 else
5178 }
5180 {
5187 else
5189 }
5190 else
5191 {
5200 else
5202 }
5205 }
5208 }
5210 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5211 _frvfdpic_assign_plt_entries. */
5213 static int
5215 {
5228 }
5230 /* Follow indirect and warning hash entries so that each got entry
5231 points to the final symbol definition. P must point to a pointer
5232 to the hash table we're traversing. Since this traversal may
5233 modify the hash table, we set this pointer to NULL to indicate
5234 we've made a potentially-destructive change to the hash table, so
5235 the traversal must be restarted. */
5236 static int
5238 {
5243 {
5255 NO_INSERT);
5258 {
5259 /* Merge the two entries. */
5263 }
5267 /* If we can't find this entry with the new bfd hash, re-insert
5268 it, and get the traversal restarted. */
5270 {
5275 /* Abort the traversal, since the whole table may have
5276 moved, and leave it up to the parent to restart the
5277 process. */
5280 }
5281 }
5284 }
5286 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5287 section and the rofixup section. Assign locations for GOT and PLT
5288 entries. */
5290 static bfd_boolean
5293 {
5294 bfd_signed_vma odd;
5303 /* Compute the total size taken by entries in the 12-bit and 16-bit
5304 ranges, to tell how many PLT function descriptors we can bring
5305 into the 12-bit range without causing the 16-bit range to
5306 overflow. */
5312 else
5315 {
5318 }
5319 else
5324 /* Determine the ranges of GOT offsets that we can use for each
5325 range of addressing modes. */
5328 odd,
5332 limit,
5334 tlslimit,
5338 odd,
5350 odd,
5363 /* Now assign (most) GOT offsets. */
5365 gpinfop);
5369 /* If an odd word is the last word of the GOT, we don't need this
5370 word to be part of the GOT. */
5376 {
5379 }
5380 /* This will be non-NULL during relaxation. The assumption is that
5381 the size of one of these sections will never grow, only shrink,
5382 so we can use the larger buffer we allocated before. */
5384 {
5390 }
5393 /* Subtract the number of lzplt entries, since those will generate
5394 relocations in the pltrel section. */
5398 else
5403 {
5409 }
5415 {
5421 }
5424 {
5431 {
5437 }
5438 }
5440 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5441 such that there's room for the additional instruction needed to
5442 call the resolver. Since _frvfdpic_assign_got_entries didn't
5443 account for them, our block size is 4 bytes smaller than the real
5444 block size. */
5446 {
5450 }
5452 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5453 actually assign lazy PLT entries addresses. */
5456 /* Save information that we're going to need to generate GOT and PLT
5457 entries. */
5468 /* Allocate a ret statement at plt_initial_offset, to be used by
5469 locally-resolved TLS descriptors. */
5474 gpinfop);
5476 /* Allocate the PLT section contents only after
5477 _frvfdpic_assign_plt_entries has a chance to add the size of the
5478 non-lazy PLT entries. */
5480 {
5484 {
5490 }
5491 }
5494 }
5496 /* Set the sizes of the dynamic sections. */
5498 static bfd_boolean
5501 {
5510 {
5511 /* Set the contents of the .interp section to the interpreter. */
5513 {
5518 }
5519 }
5525 {
5532 }
5537 /* Allocate space to save the summary information, we're going to
5538 use it if we're doing relaxations. */
5545 {
5562 }
5565 }
5567 static bfd_boolean
5570 {
5572 {
5575 /* Force a PT_GNU_STACK segment to be created. */
5579 /* Define __stacksize if it's not defined yet. */
5585 {
5598 /* This one must NOT be hidden. */
5599 }
5600 }
5603 }
5605 /* Check whether any of the relocations was optimized away, and
5606 subtract it from the relocation or fixup count. */
5607 static bfd_boolean
5612 {
5626 /* Now examine each relocation. */
5628 {
5646 else
5647 {
5652 }
5658 else
5675 }
5678 }
5680 static bfd_boolean
5684 {
5689 /* Account for relaxation of .eh_frame section. */
5692 {
5696 }
5699 {
5706 /* Clear GOT and PLT assignments. */
5708 _frvfdpic_reset_got_plt_entries,
5709 NULL);
5713 }
5716 }
5718 /* Look for opportunities to relax TLS relocations. We can assume
5719 we're linking the main executable or a static-tls library, since
5720 otherwise we wouldn't have got here. */
5722 static int
5724 {
5731 }
5733 static bfd_boolean
5736 {
5739 /* If we return early, we didn't change anything. */
5742 /* We'll do our thing when requested to relax the GOT section. */
5746 /* We can only relax when linking the main executable or a library
5747 that can't be dlopened. */
5751 /* If there isn't a TLS section for this binary, we can't do
5752 anything about its TLS relocations (it probably doesn't have
5753 any. */
5760 /* Now look for opportunities to relax, adjusting the GOT usage
5761 as needed. */
5763 _frvfdpic_relax_got_plt_entries,
5766 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5769 {
5770 /* Clear GOT and PLT assignments. */
5772 _frvfdpic_reset_got_plt_entries,
5773 NULL);
5775 /* The owner of the TLS section is the output bfd. There should
5776 be a better way to get to it. */
5781 /* Repeat until we don't make any further changes. We could fail to
5782 introduce changes in a round if, for example, the 12-bit range is
5783 full, but we later release some space by getting rid of TLS
5784 descriptors in it. We have to repeat the whole process because
5785 we might have changed the size of a section processed before this
5786 one. */
5788 }
5791 }
5793 static bfd_boolean
5796 {
5801 /* objcopy and strip preserve what's already there using
5802 elf32_frvfdpic_copy_private_bfd_data (). */
5811 {
5814 /* Obtain the pointer to the __stacksize symbol. */
5818 {
5823 }
5825 /* Set the header p_memsz from the symbol value. We
5826 intentionally ignore the symbol section. */
5829 else
5833 }
5836 }
5838 /* Fill in code and data in dynamic sections. */
5840 static bfd_boolean
5843 {
5844 /* Nothing to be done for non-FDPIC. */
5846 }
5848 static bfd_boolean
5851 {
5858 {
5860 }
5862 {
5868 {
5880 {
5881 error:
5885 }
5892 {
5893 bfd_vma value =
5902 }
5903 }
5904 }
5906 {
5910 }
5914 {
5926 {
5927 Elf_Internal_Dyn dyn;
5932 {
5954 }
5955 }
5956 }
5959 }
5961 /* Adjust a symbol defined by a dynamic object and referenced by a
5962 regular object. */
5964 static bfd_boolean
5965 elf32_frvfdpic_adjust_dynamic_symbol
5968 {
5973 /* Make sure we know what is going on here. */
5980 /* If this is a weak symbol, and there is a real definition, the
5981 processor independent code will have arranged for us to see the
5982 real definition first, and we can just use the same value. */
5984 {
5989 }
5992 }
5994 /* Perform any actions needed for dynamic symbols. */
5996 static bfd_boolean
5997 elf32_frvfdpic_finish_dynamic_symbol
6002 {
6004 }
6006 /* Decide whether to attempt to turn absptr or lsda encodings in
6007 shared libraries into pcrel within the given input section. */
6009 static bfd_boolean
6010 frvfdpic_elf_use_relative_eh_frame
6014 {
6015 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
6017 }
6019 /* Adjust the contents of an eh_frame_hdr section before they're output. */
6021 static bfd_byte
6027 {
6039 == (_frvfdpic_osec_to_segment
6048 }
6050 /* Look through the relocs for a section during the first phase.
6052 Besides handling virtual table relocs for gc, we have to deal with
6053 all sorts of PIC-related relocations. We describe below the
6054 general plan on how to handle such relocations, even though we only
6055 collect information at this point, storing them in hash tables for
6056 perusal of later passes.
6058 32 relocations are propagated to the linker output when creating
6059 position-independent output. LO16 and HI16 relocations are not
6060 supposed to be encountered in this case.
6062 LABEL16 should always be resolvable by the linker, since it's only
6063 used by branches.
6065 LABEL24, on the other hand, is used by calls. If it turns out that
6066 the target of a call is a dynamic symbol, a PLT entry must be
6067 created for it, which triggers the creation of a private function
6068 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
6070 GPREL relocations require the referenced symbol to be in the same
6071 segment as _gp, but this can only be checked later.
6073 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
6074 exist. LABEL24 might as well, since it may require a PLT entry,
6075 that will require a got.
6077 Non-FUNCDESC GOT relocations require a GOT entry to be created
6078 regardless of whether the symbol is dynamic. However, since a
6079 global symbol that turns out to not be exported may have the same
6080 address of a non-dynamic symbol, we don't assign GOT entries at
6081 this point, such that we can share them in this case. A relocation
6082 for the GOT entry always has to be created, be it to offset a
6083 private symbol by the section load address, be it to get the symbol
6084 resolved dynamically.
6086 FUNCDESC GOT relocations require a GOT entry to be created, and
6087 handled as if a FUNCDESC relocation was applied to the GOT entry in
6088 an object file.
6090 FUNCDESC relocations referencing a symbol that turns out to NOT be
6091 dynamic cause a private function descriptor to be created. The
6092 FUNCDESC relocation then decays to a 32 relocation that points at
6093 the private descriptor. If the symbol is dynamic, the FUNCDESC
6094 relocation is propagated to the linker output, such that the
6095 dynamic linker creates the canonical descriptor, pointing to the
6096 dynamically-resolved definition of the function.
6098 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
6099 symbols that are assigned to the same segment as the GOT, but we
6100 can only check this later, after we know the complete set of
6101 symbols defined and/or exported.
6103 FUNCDESC GOTOFF relocations require a function descriptor to be
6104 created and, unless lazy binding is disabled or the symbol is not
6105 dynamic, a lazy PLT entry. Since we can't tell at this point
6106 whether a symbol is going to be dynamic, we have to decide later
6107 whether to create a lazy PLT entry or bind the descriptor directly
6108 to the private function.
6110 FUNCDESC_VALUE relocations are not supposed to be present in object
6111 files, but they may very well be simply propagated to the linker
6112 output, since they have no side effect.
6115 A function descriptor always requires a FUNCDESC_VALUE relocation.
6116 Whether it's in .plt.rel or not depends on whether lazy binding is
6117 enabled and on whether the referenced symbol is dynamic.
6119 The existence of a lazy PLT requires the resolverStub lazy PLT
6120 entry to be present.
6123 As for assignment of GOT, PLT and lazy PLT entries, and private
6124 descriptors, we might do them all sequentially, but we can do
6125 better than that. For example, we can place GOT entries and
6126 private function descriptors referenced using 12-bit operands
6127 closer to the PIC register value, such that these relocations don't
6128 overflow. Those that are only referenced with LO16 relocations
6129 could come next, but we may as well place PLT-required function
6130 descriptors in the 12-bit range to make them shorter. Symbols
6131 referenced with LO16/HI16 may come next, but we may place
6132 additional function descriptors in the 16-bit range if we can
6133 reliably tell that we've already placed entries that are ever
6134 referenced with only LO16. PLT entries are therefore generated as
6135 small as possible, while not introducing relocation overflows in
6136 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6137 generated before or after PLT entries, but not intermingled with
6138 them, such that we can have more lazy PLT entries in range for a
6139 branch to the resolverStub. The resolverStub should be emitted at
6140 the most distant location from the first lazy PLT entry such that
6141 it's still in range for a branch, or closer, if there isn't a need
6142 for so many lazy PLT entries. Additional lazy PLT entries may be
6143 emitted after the resolverStub, as long as branches are still in
6144 range. If the branch goes out of range, longer lazy PLT entries
6145 are emitted.
6147 We could further optimize PLT and lazy PLT entries by giving them
6148 priority in assignment to closer-to-gr17 locations depending on the
6149 number of occurrences of references to them (assuming a function
6150 that's called more often is more important for performance, so its
6151 PLT entry should be faster), or taking hints from the compiler.
6152 Given infinite time and money... :-) */
6154 static bfd_boolean
6160 {
6177 {
6184 else
6185 {
6190 }
6193 {
6223 /* Fall through. */
6231 {
6235 }
6237 {
6240 }
6242 {
6245 {
6252 }
6253 picrel
6257 }
6258 else
6269 }
6272 {
6282 /* Fall through. */
6370 /* This relocation describes the C++ object vtable hierarchy.
6371 Reconstruct it for later use during GC. */
6377 /* This relocation describes which C++ vtable entries are actually
6378 used. Record for later use during GC. */
6400 bad_reloc:
6405 }
6406 }
6409 }
6411 \f
6412 /* Return the machine subcode from the ELF e_flags header. */
6414 static int
6417 {
6419 {
6429 }
6432 }
6434 /* Set the right machine number for a FRV ELF file. */
6436 static bfd_boolean
6439 {
6443 }
6444 \f
6445 /* Function to set the ELF flag bits. */
6447 static bfd_boolean
6450 flagword flags;
6451 {
6455 }
6457 /* Copy backend specific data from one object module to another. */
6459 static bfd_boolean
6463 {
6474 /* Copy object attributes. */
6478 }
6480 /* Return true if the architecture described by elf header flag
6481 EXTENSION is an extension of the architecture described by BASE. */
6483 static bfd_boolean
6485 {
6489 /* CPU_GENERIC code can be merged with code for a specific
6490 architecture, in which case the result is marked as being
6491 for the specific architecture. Everything is therefore
6492 an extension of CPU_GENERIC. */
6505 }
6507 static bfd_boolean
6509 {
6523 /* Copy the stack size. */
6526 {
6531 {
6534 /* Rewrite the phdrs, since we're only called after they
6535 were first written. */
6543 }
6546 }
6549 }
6551 /* Merge backend specific data from an object file to the output
6552 object file when linking. */
6554 static bfd_boolean
6558 {
6572 #ifdef DEBUG
6576 #endif
6579 {
6582 }
6585 ;
6588 {
6589 /* Warn if different # of gprs are used. Note, 0 means nothing is
6590 said about the size of gprs. */
6594 ;
6597 ;
6602 else
6603 {
6605 {
6609 }
6612 {
6616 }
6617 }
6619 /* Warn if different # of fprs are used. Note, 0 means nothing is
6620 said about the size of fprs. */
6624 ;
6627 ;
6632 else
6633 {
6635 {
6640 }
6643 {
6648 }
6649 }
6651 /* Warn if different dword support was used. Note, 0 means nothing is
6652 said about the dword support. */
6656 ;
6659 ;
6664 else
6665 {
6667 {
6671 }
6674 {
6678 }
6679 }
6681 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6682 feature is used. */
6684 | EF_FRV_MEDIA
6685 | EF_FRV_MULADD
6688 /* If any module was compiled without -G0, clear the G0 bit. */
6692 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6696 /* We don't have to do anything if the pic flags are the same, or the new
6697 module(s) were compiled with -mlibrary-pic. */
6701 ;
6703 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6704 flags if any from the new module. */
6708 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6712 /* One module was compiled for pic and the other was not, see if we have
6713 had any relocations that are not pic-safe. */
6714 else
6715 {
6718 else
6719 {
6721 #ifndef FRV_NO_PIC_ERROR
6727 #endif
6728 }
6729 }
6731 /* Warn if different cpu is used (allow a specific cpu to override
6732 the generic cpu). */
6736 ;
6741 else
6742 {
6744 {
6755 }
6758 {
6769 }
6770 }
6772 /* Print out any mismatches from above. */
6774 {
6779 }
6781 /* Warn about any other mismatches */
6785 {
6791 }
6792 }
6794 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6798 /* Update the old flags now with changes made above. */
6806 {
6812 else
6816 }
6822 }
6824 \f
6825 bfd_boolean
6828 PTR ptr;
6829 {
6831 flagword flags;
6835 /* Print normal ELF private data. */
6842 {
6852 }
6855 {
6859 }
6862 {
6867 }
6870 {
6874 }
6905 }
6907 \f
6908 /* Support for core dump NOTE sections. */
6910 static bfd_boolean
6912 {
6917 {
6921 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6922 hardcoded offsets and sizes listed below (and contained within
6923 this lexical block) refer to fields in the target's elf_prstatus
6924 struct. */
6926 /* `pr_cursig' is at offset 12. */
6929 /* `pr_pid' is at offset 24. */
6932 /* `pr_reg' is at offset 72. */
6935 /* Most grok_prstatus implementations set `raw_size' to the size
6936 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6937 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6938 and `pr_interp_fdpic_loadmap', both of which (by design)
6939 immediately follow `pr_reg'. This will allow these fields to
6940 be viewed by GDB as registers.
6942 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6943 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6947 }
6949 /* Make a ".reg/999" section. */
6952 }
6954 static bfd_boolean
6956 {
6958 {
6962 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6965 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6969 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6972 }
6974 /* Note that for some reason, a spurious space is tacked
6975 onto the end of the args in some (at least one anyway)
6976 implementations, so strip it off if it exists. */
6978 {
6984 }
6987 }
6988 #define ELF_ARCH bfd_arch_frv
6989 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6990 #define ELF_MAXPAGESIZE 0x1000
6992 #define TARGET_BIG_SYM bfd_elf32_frv_vec
6995 #define elf_info_to_howto frv_info_to_howto_rela
6996 #define elf_backend_relocate_section elf32_frv_relocate_section
6997 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6998 #define elf_backend_check_relocs elf32_frv_check_relocs
6999 #define elf_backend_object_p elf32_frv_object_p
7000 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
7002 #define elf_backend_can_gc_sections 1
7003 #define elf_backend_rela_normal 1
7005 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
7006 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
7007 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
7008 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
7009 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
7010 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
7012 #define elf_backend_want_got_sym 1
7013 #define elf_backend_got_header_size 0
7014 #define elf_backend_want_got_plt 0
7015 #define elf_backend_plt_readonly 1
7016 #define elf_backend_want_plt_sym 0
7017 #define elf_backend_plt_header_size 0
7019 #define elf_backend_finish_dynamic_sections \
7020 elf32_frv_finish_dynamic_sections
7022 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
7023 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
7027 #undef ELF_MAXPAGESIZE
7028 #define ELF_MAXPAGESIZE 0x4000
7030 #undef TARGET_BIG_SYM
7031 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
7032 #undef TARGET_BIG_NAME
7034 #undef elf32_bed
7035 #define elf32_bed elf32_frvfdpic_bed
7037 #undef elf_info_to_howto_rel
7038 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
7040 #undef bfd_elf32_bfd_link_hash_table_create
7041 #define bfd_elf32_bfd_link_hash_table_create \
7042 frvfdpic_elf_link_hash_table_create
7043 #undef elf_backend_always_size_sections
7044 #define elf_backend_always_size_sections \
7045 elf32_frvfdpic_always_size_sections
7046 #undef elf_backend_modify_program_headers
7047 #define elf_backend_modify_program_headers \
7048 elf32_frvfdpic_modify_program_headers
7049 #undef bfd_elf32_bfd_copy_private_bfd_data
7050 #define bfd_elf32_bfd_copy_private_bfd_data \
7051 elf32_frvfdpic_copy_private_bfd_data
7053 #undef elf_backend_create_dynamic_sections
7054 #define elf_backend_create_dynamic_sections \
7055 elf32_frvfdpic_create_dynamic_sections
7056 #undef elf_backend_adjust_dynamic_symbol
7057 #define elf_backend_adjust_dynamic_symbol \
7058 elf32_frvfdpic_adjust_dynamic_symbol
7059 #undef elf_backend_size_dynamic_sections
7060 #define elf_backend_size_dynamic_sections \
7061 elf32_frvfdpic_size_dynamic_sections
7062 #undef bfd_elf32_bfd_relax_section
7063 #define bfd_elf32_bfd_relax_section \
7064 elf32_frvfdpic_relax_section
7065 #undef elf_backend_finish_dynamic_symbol
7066 #define elf_backend_finish_dynamic_symbol \
7067 elf32_frvfdpic_finish_dynamic_symbol
7068 #undef elf_backend_finish_dynamic_sections
7069 #define elf_backend_finish_dynamic_sections \
7070 elf32_frvfdpic_finish_dynamic_sections
7072 #undef elf_backend_discard_info
7073 #define elf_backend_discard_info \
7074 frvfdpic_elf_discard_info
7075 #undef elf_backend_can_make_relative_eh_frame
7076 #define elf_backend_can_make_relative_eh_frame \
7077 frvfdpic_elf_use_relative_eh_frame
7078 #undef elf_backend_can_make_lsda_relative_eh_frame
7079 #define elf_backend_can_make_lsda_relative_eh_frame \
7080 frvfdpic_elf_use_relative_eh_frame
7081 #undef elf_backend_encode_eh_address
7082 #define elf_backend_encode_eh_address \
7083 frvfdpic_elf_encode_eh_address
7085 #undef elf_backend_may_use_rel_p
7086 #define elf_backend_may_use_rel_p 1
7087 #undef elf_backend_may_use_rela_p
7088 #define elf_backend_may_use_rela_p 1
7089 /* We use REL for dynamic relocations only. */
7090 #undef elf_backend_default_use_rela_p
7091 #define elf_backend_default_use_rela_p 1
7093 #undef elf_backend_omit_section_dynsym
7094 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym