| blob | 7f3c4dd23ebcca41d3aa4c83d1e09c722734b5fa |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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(p) \
886 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
887 == FRV_ELF_DATA ? ((struct frvfdpic_elf_link_hash_table *) ((p)->hash)) : NULL)
889 #define frvfdpic_got_section(info) \
890 (frvfdpic_hash_table (info)->sgot)
891 #define frvfdpic_gotrel_section(info) \
892 (frvfdpic_hash_table (info)->sgotrel)
893 #define frvfdpic_gotfixup_section(info) \
894 (frvfdpic_hash_table (info)->sgotfixup)
895 #define frvfdpic_plt_section(info) \
896 (frvfdpic_hash_table (info)->splt)
897 #define frvfdpic_pltrel_section(info) \
898 (frvfdpic_hash_table (info)->spltrel)
899 #define frvfdpic_relocs_info(info) \
900 (frvfdpic_hash_table (info)->relocs_info)
901 #define frvfdpic_got_initial_offset(info) \
902 (frvfdpic_hash_table (info)->got0)
903 #define frvfdpic_plt_initial_offset(info) \
904 (frvfdpic_hash_table (info)->plt0)
905 #define frvfdpic_dynamic_got_plt_info(info) \
906 (frvfdpic_hash_table (info)->g)
908 /* Currently it's the same, but if some day we have a reason to change
909 it, we'd better be using a different macro.
911 FIXME: if there's any TLS PLT entry that uses local-exec or
912 initial-exec models, we could use the ret at the end of any of them
913 instead of adding one more. */
914 #define frvfdpic_plt_tls_ret_offset(info) \
915 (frvfdpic_plt_initial_offset (info))
917 /* The name of the dynamic interpreter. This is put in the .interp
918 section. */
922 #define DEFAULT_STACK_SIZE 0x20000
924 /* This structure is used to collect the number of entries present in
925 each addressable range of the got. */
926 struct _frvfdpic_dynamic_got_info
927 {
928 /* Several bits of information about the current link. */
930 /* Total GOT size needed for GOT entries within the 12-, 16- or 32-bit
931 ranges. */
933 /* Total GOT size needed for function descriptor entries within the 12-,
934 16- or 32-bit ranges. */
936 /* Total GOT size needed by function descriptor entries referenced
937 in PLT entries, that would be profitable to place in offsets
938 close to the PIC register. */
939 bfd_vma fdplt;
940 /* Total PLT size needed by lazy PLT entries. */
941 bfd_vma lzplt;
942 /* Total GOT size needed for TLS descriptor entries within the 12-,
943 16- or 32-bit ranges. */
945 /* Total GOT size needed by TLS descriptors referenced in PLT
946 entries, that would be profitable to place in offers close to the
947 PIC register. */
948 bfd_vma tlsdplt;
949 /* Total PLT size needed by TLS lazy PLT entries. */
950 bfd_vma tlslzplt;
951 /* Number of relocations carried over from input object files. */
953 /* Number of fixups introduced by relocations in input object files. */
955 /* The number of fixups that reference the ret instruction added to
956 the PLT for locally-resolved TLS descriptors. */
958 };
960 /* This structure is used to assign offsets to got entries, function
961 descriptors, plt entries and lazy plt entries. */
963 struct _frvfdpic_dynamic_got_plt_info
964 {
965 /* Summary information collected with _frvfdpic_count_got_plt_entries. */
968 /* For each addressable range, we record a MAX (positive) and MIN
969 (negative) value. CUR is used to assign got entries, and it's
970 incremented from an initial positive value to MAX, then from MIN
971 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
972 assign function descriptors, and it's decreased from an initial
973 non-positive value to MIN, then from MAX down to CUR (unless CUR
974 wraps around first). All of MIN, MAX, CUR and FDCUR always point
975 to even words. ODD, if non-zero, indicates an odd word to be
976 used for the next got entry, otherwise CUR is used and
977 incremented by a pair of words, wrapping around when it reaches
978 MAX. FDCUR is decremented (and wrapped) before the next function
979 descriptor is chosen. FDPLT indicates the number of remaining
980 slots that can be used for function descriptors used only by PLT
981 entries.
983 TMAX, TMIN and TCUR are used to assign TLS descriptors. TCUR
984 starts as MAX, and grows up to TMAX, then wraps around to TMIN
985 and grows up to MIN. TLSDPLT indicates the number of remaining
986 slots that can be used for TLS descriptors used only by TLS PLT
987 entries. */
988 struct _frvfdpic_dynamic_got_alloc_data
989 {
994 };
996 /* Create an FRV ELF linker hash table. */
1000 {
1009 _bfd_elf_link_hash_newfunc,
1011 FRV_ELF_DATA))
1012 {
1015 }
1018 }
1020 /* Decide whether a reference to a symbol can be resolved locally or
1021 not. If the symbol is protected, we want the local address, but
1022 its function descriptor must be assigned by the dynamic linker. */
1023 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
1024 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1025 || ! elf_hash_table (INFO)->dynamic_sections_created)
1026 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
1027 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1029 /* This structure collects information on what kind of GOT, PLT or
1030 function descriptors are required by relocations that reference a
1031 certain symbol. */
1032 struct frvfdpic_relocs_info
1033 {
1034 /* The index of the symbol, as stored in the relocation r_info, if
1035 we have a local symbol; -1 otherwise. */
1037 union
1038 {
1039 /* The input bfd in which the symbol is defined, if it's a local
1040 symbol. */
1042 /* If symndx == -1, the hash table entry corresponding to a global
1043 symbol (even if it turns out to bind locally, in which case it
1044 should ideally be replaced with section's symndx + addend). */
1047 /* The addend of the relocation that references the symbol. */
1048 bfd_vma addend;
1050 /* The fields above are used to identify an entry. The fields below
1051 contain information on how an entry is used and, later on, which
1052 locations it was assigned. */
1053 /* The following 3 fields record whether the symbol+addend above was
1054 ever referenced with a GOT relocation. The 12 suffix indicates a
1055 GOT12 relocation; los is used for GOTLO relocations that are not
1056 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1057 pairs. */
1061 /* Whether a FUNCDESC relocation references symbol+addend. */
1063 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1067 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1071 /* Whether a GETTLSOFF relocation references symbol+addend. */
1073 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1074 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1075 We might instead just pre-compute flags telling whether the
1076 object is suitable for local exec, initial exec or general
1077 dynamic addressing, and use that all over the place. We could
1078 also try to do a better job of merging TLSOFF and TLSDESC entries
1079 in main executables, but perhaps we can get rid of TLSDESC
1080 entirely in them instead. */
1081 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1085 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1089 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1090 GOTOFFHI relocations. The addend doesn't really matter, since we
1091 envision that this will only be used to check whether the symbol
1092 is mapped to the same segment as the got. */
1094 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1096 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1097 relocation. */
1099 /* Whether we need a PLT entry for a symbol. Should be implied by
1100 something like:
1101 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1103 /* Whether a function descriptor should be created in this link unit
1104 for symbol+addend. Should be implied by something like:
1105 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1106 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1107 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1109 /* Whether a lazy PLT entry is needed for this symbol+addend.
1110 Should be implied by something like:
1111 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1112 && ! (info->flags & DF_BIND_NOW)) */
1114 /* Whether we've already emitted GOT relocations and PLT entries as
1115 needed for this symbol. */
1118 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1119 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1120 symbol+addend. */
1123 /* The number of .rofixups entries and dynamic relocations allocated
1124 for this symbol, minus any that might have already been used. */
1127 /* The offsets of the GOT entries assigned to symbol+addend, to the
1128 function descriptor's address, and to a function descriptor,
1129 respectively. Should be zero if unassigned. The offsets are
1130 counted from the value that will be assigned to the PIC register,
1131 not from the beginning of the .got section. */
1133 /* The offsets of the PLT entries assigned to symbol+addend,
1134 non-lazy and lazy, respectively. If unassigned, should be
1135 (bfd_vma)-1. */
1137 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1139 /* The offset of the TLS offset PLT entry. */
1140 bfd_vma tlsplt_entry;
1141 };
1143 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1144 static hashval_t
1146 {
1152 }
1154 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1155 identical. */
1156 static int
1158 {
1164 }
1166 /* Find or create an entry in a hash table HT that matches the key
1167 fields of the given ENTRY. If it's not found, memory for a new
1168 entry is allocated in ABFD's obstack. */
1174 {
1197 }
1199 /* Obtain the address of the entry in HT associated with H's symbol +
1200 addend, creating a new entry if none existed. ABFD is only used
1201 for memory allocation purposes. */
1206 bfd_vma addend,
1208 {
1216 }
1218 /* Obtain the address of the entry in HT associated with the SYMNDXth
1219 local symbol of the input bfd ABFD, plus the addend, creating a new
1220 entry if none existed. */
1225 bfd_vma addend,
1227 {
1235 }
1237 /* Merge fields set by check_relocs() of two entries that end up being
1238 mapped to the same (presumably global) symbol. */
1243 {
1264 }
1266 /* Every block of 65535 lazy PLT entries shares a single call to the
1267 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1268 32767, counting from 0). All other lazy PLT entries branch to it
1269 in a single instruction. */
1271 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1272 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1274 /* Add a dynamic relocation to the SRELOC section. */
1280 {
1281 Elf_Internal_Rela outrel;
1282 bfd_vma reloc_offset;
1294 /* If the entry's index is zero, this relocation was probably to a
1295 linkonce section that got discarded. We reserved a dynamic
1296 relocation, but it was for another entry than the one we got at
1297 the time of emitting the relocation. Unfortunately there's no
1298 simple way for us to catch this situation, since the relocation
1299 is cleared right before calling relocate_section, at which point
1300 we no longer know what the relocation used to point to. */
1302 {
1305 }
1308 }
1310 /* Add a fixup to the ROFIXUP section. */
1312 static bfd_vma
1315 {
1316 bfd_vma fixup_offset;
1323 {
1326 }
1330 {
1331 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1332 above. */
1335 }
1338 }
1340 /* Find the segment number in which OSEC, and output section, is
1341 located. */
1343 static unsigned
1345 {
1349 }
1353 {
1357 }
1359 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1361 /* Return the base VMA address which should be subtracted from real addresses
1362 when resolving TLSMOFF relocation.
1363 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1365 static bfd_vma
1367 {
1368 /* If tls_sec is NULL, we should have signalled an error already. */
1372 }
1374 /* Generate relocations for GOT entries, function descriptors, and
1375 code for PLT and lazy PLT entries. */
1383 bfd_vma addend)
1385 {
1395 {
1396 /* If the symbol is dynamic, consider it for dynamic
1397 relocations, otherwise decay to section + offset. */
1400 else
1401 {
1407 else
1409 }
1410 }
1412 /* Generate relocation for GOT entry pointing to the symbol. */
1414 {
1418 /* If the symbol is dynamic but binds locally, use
1419 section+offset. */
1422 {
1425 else
1430 else
1432 }
1434 /* If we're linking an executable at a fixed address, we can
1435 omit the dynamic relocation as long as the symbol is local to
1436 this module. */
1440 {
1448 ->vma
1452 }
1453 else
1455 _bfd_elf_section_offset
1469 }
1471 /* Generate relocation for GOT entry pointing to a canonical
1472 function descriptor. */
1474 {
1481 {
1482 /* If the symbol is dynamic and there may be dynamic symbol
1483 resolution because we are, or are linked with, a shared
1484 library, emit a FUNCDESC relocation such that the dynamic
1485 linker will allocate the function descriptor. If the
1486 symbol needs a non-local function descriptor but binds
1487 locally (e.g., its visibility is protected, emit a
1488 dynamic relocation decayed to section+offset. */
1493 {
1499 }
1502 {
1507 {
1514 }
1515 }
1516 else
1517 {
1518 /* Otherwise, we know we have a private function descriptor,
1519 so reference it directly. */
1527 }
1529 /* If there is room for dynamic symbol resolution, emit the
1530 dynamic relocation. However, if we're linking an
1531 executable at a fixed location, we won't have emitted a
1532 dynamic symbol entry for the got section, so idx will be
1533 zero, which means we can and should compute the address
1534 of the private descriptor ourselves. */
1538 {
1545 ->output_offset
1548 }
1549 else
1552 _bfd_elf_section_offset
1562 }
1568 }
1570 /* Generate relocation to fill in a private function descriptor in
1571 the GOT. */
1573 {
1576 bfd_vma ofst;
1579 /* If the symbol is dynamic but binds locally, use
1580 section+offset. */
1583 {
1586 else
1591 else
1593 }
1595 /* If we're linking an executable at a fixed address, we can
1596 omit the dynamic relocation as long as the symbol is local to
1597 this module. */
1600 {
1606 {
1612 ->output_offset
1620 ->output_offset
1623 }
1624 }
1625 else
1626 {
1627 ofst =
1629 entry->lazyplt
1632 _bfd_elf_section_offset
1642 }
1644 /* If we've omitted the dynamic relocation, just emit the fixed
1645 addresses of the symbol and of the local GOT base offset. */
1647 {
1652 }
1654 {
1656 {
1663 }
1667 /* A function descriptor used for lazy or local resolving is
1668 initialized such that its high word contains the output
1669 section index in which the PLT entries are located, and
1670 the low word contains the address of the lazy PLT entry
1671 entry point, that must be within the memory region
1672 assigned to that section. */
1676 highword = _frvfdpic_osec_to_segment
1678 }
1679 else
1680 {
1681 /* A function descriptor for a local function gets the index
1682 of the section. For a non-local function, it's
1683 disregarded. */
1689 else
1690 highword = _frvfdpic_osec_to_segment
1692 }
1702 }
1704 /* Generate code for the PLT entry. */
1706 {
1712 /* Figure out what kind of PLT entry we need, depending on the
1713 location of the function descriptor within the GOT. */
1716 {
1717 /* lddi @(gr15, fd_entry), gr14 */
1720 plt_code);
1722 }
1723 else
1724 {
1727 {
1728 /* setlos lo(fd_entry), gr14 */
1730 0x9cfc0000
1732 plt_code);
1734 }
1735 else
1736 {
1737 /* sethi.p hi(fd_entry), gr14
1738 setlo lo(fd_entry), gr14 */
1740 0x1cf80000
1743 plt_code);
1746 0x9cf40000
1748 plt_code);
1750 }
1751 /* ldd @(gr14,gr15),gr14 */
1754 }
1755 /* jmpl @(gr14,gr0) */
1757 }
1759 /* Generate code for the lazy PLT entry. */
1761 {
1764 bfd_vma resolverStub_addr;
1775 {
1776 /* This is a lazy PLT entry that includes a resolver call. */
1777 /* ldd @(gr15,gr0), gr4
1778 jmpl @(gr4,gr0) */
1781 }
1782 else
1783 {
1784 /* bra resolverStub */
1786 0xc01a0000
1789 lzplt_code);
1790 }
1791 }
1793 /* Generate relocation for GOT entry holding the TLS offset. */
1795 {
1801 {
1802 /* If the symbol is dynamic but binds locally, use
1803 section+offset. */
1805 {
1808 else
1814 else
1816 }
1817 }
1819 /* *ABS*+addend is special for TLS relocations, use only the
1820 addend. */
1825 ;
1826 /* If we're linking an executable, we can entirely omit the
1827 dynamic relocation if the symbol is local to this module. */
1831 {
1834 }
1835 else
1836 {
1840 {
1842 {
1847 }
1850 }
1852 _bfd_elf_section_offset
1862 }
1868 }
1871 {
1875 /* If the symbol is dynamic but binds locally, use
1876 section+offset. */
1879 {
1882 else
1887 else
1889 }
1891 /* If we didn't set up a TLS offset entry, but we're linking an
1892 executable and the symbol binds locally, we can use the
1893 module offset in the TLS descriptor in relaxations. */
1903 {
1904 /* *ABS*+addend is special for TLS relocations, use only the
1905 addend for the TLS offset, and take the module id as
1906 0. */
1910 ;
1911 /* For other TLS symbols that bind locally, add the section
1912 TLS offset to the addend. */
1929 ->output_offset
1935 /* We've used one of the reserved fixups, so discount it so
1936 that we can check at the end that we've used them
1937 all. */
1940 /* While at that, make sure the ret instruction makes to the
1941 right location in the PLT. We could do it only when we
1942 got to 0, but since the check at the end will only print
1943 a warning, make sure we have the ret in place in case the
1944 warning is missed. */
1948 }
1949 else
1950 {
1954 {
1956 {
1961 }
1964 }
1967 _bfd_elf_section_offset
1982 }
1988 }
1990 /* Generate code for the get-TLS-offset PLT entry. */
1992 {
1999 {
2003 /* sec may be NULL when referencing an undefweak symbol
2004 while linking a static executable. */
2006 {
2009 }
2010 else
2011 {
2014 else
2020 else
2022 }
2024 /* *ABS*+addend is special for TLS relocations, use only the
2025 addend for the TLS offset, and take the module id as
2026 0. */
2030 ;
2031 /* For other TLS symbols that bind locally, add the section
2032 TLS offset to the addend. */
2038 {
2039 /* setlos lo(ad), gr9 */
2041 0x92fc0000
2042 | (ad
2044 plt_code);
2046 }
2047 else
2048 {
2049 /* sethi.p hi(ad), gr9
2050 setlo lo(ad), gr9 */
2052 0x12f80000
2055 plt_code);
2058 0x92f40000
2059 | (ad
2061 plt_code);
2063 }
2064 /* ret */
2066 }
2068 {
2069 /* Figure out what kind of PLT entry we need, depending on the
2070 location of the TLS descriptor within the GOT. */
2073 {
2074 /* ldi @(gr15, tlsoff_entry), gr9 */
2078 plt_code);
2080 }
2081 else
2082 {
2085 {
2086 /* setlos lo(tlsoff_entry), gr8 */
2088 0x90fc0000
2091 plt_code);
2093 }
2094 else
2095 {
2096 /* sethi.p hi(tlsoff_entry), gr8
2097 setlo lo(tlsoff_entry), gr8 */
2099 0x10f80000
2102 plt_code);
2105 0x90f40000
2108 plt_code);
2110 }
2111 /* ld @(gr15,gr8),gr9 */
2114 }
2115 /* ret */
2117 }
2118 else
2119 {
2122 /* Figure out what kind of PLT entry we need, depending on the
2123 location of the TLS descriptor within the GOT. */
2126 {
2127 /* lddi @(gr15, tlsdesc_entry), gr8 */
2131 plt_code);
2133 }
2134 else
2135 {
2138 {
2139 /* setlos lo(tlsdesc_entry), gr8 */
2141 0x90fc0000
2144 plt_code);
2146 }
2147 else
2148 {
2149 /* sethi.p hi(tlsdesc_entry), gr8
2150 setlo lo(tlsdesc_entry), gr8 */
2152 0x10f80000
2155 plt_code);
2158 0x90f40000
2161 plt_code);
2163 }
2164 /* ldd @(gr15,gr8),gr8 */
2167 }
2168 /* jmpl @(gr8,gr0) */
2170 }
2171 }
2174 }
2176 /* Handle an FRV small data reloc. */
2178 static bfd_reloc_status_type
2186 bfd_vma value;
2187 {
2188 bfd_vma insn;
2189 bfd_vma gp;
2213 }
2215 /* Handle an FRV small data reloc. for the u12 field. */
2217 static bfd_reloc_status_type
2225 bfd_vma value;
2226 {
2227 bfd_vma insn;
2228 bfd_vma gp;
2230 bfd_vma mask;
2248 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2255 }
2257 /* Handle an FRV ELF HI16 reloc. */
2259 static bfd_reloc_status_type
2264 bfd_vma value;
2265 {
2266 bfd_vma insn;
2281 }
2282 static bfd_reloc_status_type
2287 bfd_vma value;
2288 {
2289 bfd_vma insn;
2303 }
2305 /* Perform the relocation for the CALL label24 instruction. */
2307 static bfd_reloc_status_type
2313 bfd_vma value;
2314 {
2315 bfd_vma insn;
2316 bfd_vma label6;
2317 bfd_vma label18;
2319 /* The format for the call instruction is:
2321 0 000000 0001111 000000000000000000
2322 label6 opcode label18
2324 The branch calculation is: pc + (4*label24)
2325 where label24 is the concatenation of label6 and label18. */
2327 /* Grab the instruction. */
2348 }
2350 static bfd_reloc_status_type
2358 bfd_vma value;
2359 {
2360 bfd_vma insn;
2361 bfd_vma gp;
2383 }
2385 static bfd_reloc_status_type
2393 bfd_vma value;
2394 {
2395 bfd_vma insn;
2396 bfd_vma gp;
2419 }
2424 bfd_reloc_code_real_type code;
2425 {
2427 {
2438 /* Fall through. */
2576 }
2579 }
2583 {
2588 i++)
2599 }
2601 /* Set the howto pointer for an FRV ELF reloc. */
2603 static void
2608 {
2613 {
2625 }
2626 }
2628 /* Set the howto pointer for an FRV ELF REL reloc. */
2629 static void
2632 {
2637 {
2661 }
2662 }
2663 \f
2664 /* Perform a single relocation. By default we use the standard BFD
2665 routines, but a few relocs, we have to do them ourselves. */
2667 static bfd_reloc_status_type
2669 relocation)
2675 bfd_vma relocation;
2676 {
2680 }
2682 \f
2683 /* Relocate an FRV ELF section.
2685 The RELOCATE_SECTION function is called by the new ELF backend linker
2686 to handle the relocations for a section.
2688 The relocs are always passed as Rela structures; if the section
2689 actually uses Rel structures, the r_addend field will always be
2690 zero.
2692 This function is responsible for adjusting the section contents as
2693 necessary, and (if using Rela relocs and generating a relocatable
2694 output file) adjusting the reloc addend as necessary.
2696 This function does not have to worry about setting the reloc
2697 address or the reloc symbol index.
2699 LOCAL_SYMS is a pointer to the swapped in local symbols.
2701 LOCAL_SECTIONS is an array giving the section in the input file
2702 corresponding to the st_shndx field of each local symbol.
2704 The global hash table entry for the global symbols can be found
2705 via elf_sym_hashes (input_bfd).
2707 When generating relocatable output, this function must handle
2708 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2709 going to be the section symbol corresponding to the output
2710 section, which means that the addend must be adjusted
2711 accordingly. */
2713 static bfd_boolean
2724 {
2744 else
2750 else
2756 else
2761 else
2765 {
2771 bfd_vma relocation;
2772 bfd_reloc_status_type r;
2792 {
2797 name = bfd_elf_string_from_elf_section
2801 }
2802 else
2803 {
2804 bfd_boolean warned;
2805 bfd_boolean unresolved_reloc;
2813 }
2827 {
2830 }
2833 {
2873 else
2874 /* In order to find the entry we created before, we must
2875 use the original addend, not the one that may have been
2876 modified by _bfd_elf_rela_local_sym(). */
2886 {
2892 }
2897 non_fdpic:
2900 {
2906 }
2908 }
2911 {
2934 }
2936 /* Try to apply TLS relaxations. */
2939 {
2941 #define LOCAL_EXEC_P(info, picrel) \
2942 ((info)->executable \
2943 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2944 #define INITIAL_EXEC_P(info, picrel) \
2945 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2946 && (picrel)->tlsoff_entry)
2948 #define IN_RANGE_FOR_OFST12_P(value) \
2949 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2950 #define IN_RANGE_FOR_SETLOS_P(value) \
2951 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2952 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2953 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2955 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2956 (LOCAL_EXEC_P ((info), (picrel)) \
2957 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2958 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2959 (INITIAL_EXEC_P ((info), (picrel)) \
2960 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2962 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2963 (LOCAL_EXEC_P ((info), (picrel)))
2964 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2965 (INITIAL_EXEC_P ((info), (picrel)))
2967 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2968 (LOCAL_EXEC_P ((info), (picrel)) \
2969 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2974 /* Is this a call instruction? */
2976 {
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 {
3131 }
3137 {
3138 /* Replace setlo/setlos with a nop. Preserve the
3139 packing bit. */
3144 /* Nothing to relocate. */
3146 }
3149 {
3150 /* If the corresponding sethi (if it exists) decayed
3151 to a nop, make sure this becomes (or already is) a
3152 setlos, not setlo. */
3154 {
3157 }
3159 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3163 }
3170 /* Is this an ldd instruction? */
3172 {
3178 }
3183 info))
3184 {
3185 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3186 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3187 Preserve the packing bit. */
3197 }
3201 {
3202 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3203 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3204 Preserve the packing bit. */
3214 }
3218 {
3219 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3220 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3221 Preserve the packing bit. */
3231 }
3234 {
3235 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3236 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3237 Preserve the packing bit. */
3243 /* #tlsoff(symbol+offset) is just a relaxation
3244 annotation, so there's nothing left to
3245 relocate. */
3247 }
3254 /* Is this a calll or callil instruction? */
3256 {
3262 }
3267 info))
3268 {
3269 /* Replace calll with a nop. Preserve the packing bit. */
3274 /* Nothing to relocate. */
3276 }
3280 {
3281 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3282 Preserve the packing bit. */
3290 }
3293 {
3294 /* Replace calll with a nop. Preserve the packing bit. */
3299 /* Nothing to relocate. */
3301 }
3308 /* Is this an ldi instruction? */
3310 {
3316 }
3320 {
3321 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3322 with setlos #tlsmofflo(symbol+offset), grC.
3323 Preserve the packing bit. */
3331 }
3338 /* Is this a sethi instruction? */
3340 {
3346 }
3352 {
3353 /* Replace sethi with a nop. Preserve the packing bit. */
3358 /* Nothing to relocate. */
3360 }
3367 /* Is this a setlo or setlos instruction? */
3369 {
3375 }
3381 {
3382 /* Replace setlo/setlos with a nop. Preserve the
3383 packing bit. */
3388 /* Nothing to relocate. */
3390 }
3397 /* Is this an ld instruction? */
3399 {
3405 }
3409 {
3410 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3411 with setlos #tlsmofflo(symbol+offset), grC.
3412 Preserve the packing bit. */
3420 }
3424 {
3425 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3426 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3427 Preserve the packing bit. */
3435 }
3442 /* Is this a sethi instruction? */
3444 {
3450 }
3453 info))
3454 {
3455 /* Replace sethi with a nop. Preserve the packing bit. */
3460 /* Nothing to relocate. */
3462 }
3469 /* Is this a setlo or setlos instruction? */
3471 {
3477 }
3480 info))
3481 /* If the corresponding sethi (if it exists) decayed
3482 to a nop, make sure this becomes (or already is) a
3483 setlos, not setlo. */
3484 {
3487 }
3491 /*
3492 There's nothing to relax in these:
3493 R_FRV_TLSDESC_VALUE
3494 R_FRV_TLSOFF
3495 R_FRV_TLSMOFF12
3496 R_FRV_TLSMOFFHI
3497 R_FRV_TLSMOFFLO
3498 R_FRV_TLSMOFF
3499 */
3503 }
3506 {
3512 {
3517 }
3518 /* We don't want to warn on calls to undefined weak symbols,
3519 as calls to them must be protected by non-NULL tests
3520 anyway, and unprotected calls would invoke undefined
3521 behavior. */
3525 else
3565 {
3571 {
3572 /* If the symbol is dynamic and there may be dynamic
3573 symbol resolution because we are or are linked with a
3574 shared library, emit a FUNCDESC relocation such that
3575 the dynamic linker will allocate the function
3576 descriptor. If the symbol needs a non-local function
3577 descriptor but binds locally (e.g., its visibility is
3578 protected, emit a dynamic relocation decayed to
3579 section+offset. */
3583 {
3588 }
3590 {
3592 {
3598 }
3600 }
3601 else
3602 {
3603 /* Otherwise, we know we have a private function
3604 descriptor, so reference it directly. */
3612 }
3614 /* If there is room for dynamic symbol resolution, emit
3615 the dynamic relocation. However, if we're linking an
3616 executable at a fixed location, we won't have emitted a
3617 dynamic symbol entry for the got section, so idx will
3618 be zero, which means we can and should compute the
3619 address of the private descriptor ourselves. */
3622 {
3627 {
3628 bfd_vma offset;
3631 input_section
3633 {
3639 }
3641 offset = _bfd_elf_section_offset
3647 frvfdpic_gotfixup_section
3649 offset + input_section
3652 picrel);
3653 }
3654 }
3658 {
3659 bfd_vma offset;
3662 input_section
3664 {
3670 }
3672 offset = _bfd_elf_section_offset
3679 offset + input_section
3683 }
3684 else
3686 }
3688 /* We want the addend in-place because dynamic
3689 relocations are REL. Setting relocation to it should
3690 arrange for it to be installed. */
3692 }
3698 {
3701 }
3702 /* Fall through. */
3704 {
3708 /* If the symbol is dynamic but binds locally, use
3709 section+offset. */
3711 {
3713 {
3719 }
3721 }
3722 else
3723 {
3726 else
3734 else
3736 }
3738 /* If we're linking an executable at a fixed address, we
3739 can omit the dynamic relocation as long as the symbol
3740 is defined in the current link unit (which is implied
3741 by its output section not being NULL). */
3744 {
3751 {
3753 input_section
3755 {
3760 }
3762 {
3763 bfd_vma offset = _bfd_elf_section_offset
3768 {
3770 frvfdpic_gotfixup_section
3772 offset + input_section
3775 picrel);
3777 _frvfdpic_add_rofixup
3780 offset
3783 }
3784 }
3785 }
3786 }
3787 else
3788 {
3792 {
3793 bfd_vma offset;
3796 input_section
3798 {
3804 }
3806 offset = _bfd_elf_section_offset
3813 offset + input_section
3817 }
3820 /* We want the addend in-place because dynamic
3821 relocations are REL. Setting relocation to it
3822 should arrange for it to be installed. */
3824 }
3827 {
3828 /* If we've omitted the dynamic relocation, just emit
3829 the fixed addresses of the symbol and of the local
3830 GOT base offset. */
3838 else
3839 /* A function descriptor used for lazy or local
3840 resolving is initialized such that its high word
3841 contains the output section index in which the
3842 PLT entries are located, and the low word
3843 contains the offset of the lazy PLT entry entry
3844 point into that section. */
3849 sec
3852 }
3853 }
3900 {
3903 }
3905 {
3909 }
3910 else
3929 /* These shouldn't be present in input object files. */
3936 /* These are just annotations for relaxation, nothing to do
3937 here. */
3946 }
3949 {
3950 /* If you take this out, remove the #error from fdpic-static-6.d
3951 in the ld testsuite. */
3952 /* This helps catch problems in GCC while we can't do more
3953 than static linking. The idea is to test whether the
3954 input file basename is crt0.o only once. */
3956 silence_segment_error =
3965 /* We don't want duplicate errors for undefined
3966 symbols. */
3969 {
3973 }
3977 }
3980 {
3983 /* We need the addend to be applied before we shift the
3984 value right. */
3986 /* Fall through. */
3993 /* Fall through. */
4007 }
4010 {
4014 /* Fall through. */
4016 /* When referencing a GOT entry, a function descriptor or a
4017 PLT, we don't want the addend to apply to the reference,
4018 but rather to the referenced symbol. The actual entry
4019 will have already been created taking the addend into
4020 account, so cancel it out here. */
4037 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
4038 here, since we do want to apply the addend to the others.
4039 Note that we've applied the addend to GOTOFFHI before we
4040 shifted it right. */
4048 }
4080 else
4085 {
4089 {
4116 }
4119 {
4124 }
4128 }
4129 }
4132 }
4133 \f
4134 /* Return the section that should be marked against GC for a given
4135 relocation. */
4143 {
4146 {
4150 }
4153 }
4154 \f
4155 /* Hook called by the linker routine which adds symbols from an object
4156 file. We use it to put .comm items in .scomm, and not .comm. */
4158 static bfd_boolean
4167 {
4171 {
4172 /* Common symbols less than or equal to -G nn bytes are
4173 automatically put into .sbss. */
4178 {
4180 (SEC_ALLOC
4181 | SEC_IS_COMMON
4185 }
4189 }
4192 }
4194 /* We need dynamic symbols for every section, since segments can
4195 relocate independently. */
4196 static bfd_boolean
4199 ATTRIBUTE_UNUSED,
4201 {
4203 {
4206 /* If sh_type is yet undecided, assume it could be
4207 SHT_PROGBITS/SHT_NOBITS. */
4211 /* There shouldn't be section relative relocations
4212 against any other section. */
4215 }
4216 }
4218 /* Create a .got section, as well as its additional info field. This
4219 is almost entirely copied from
4220 elflink.c:_bfd_elf_create_got_section(). */
4222 static bfd_boolean
4224 {
4233 /* This function may be called more than once. */
4238 /* Machine specific: although pointers are 32-bits wide, we want the
4239 GOT to be aligned to a 64-bit boundary, such that function
4240 descriptors in it can be accessed with 64-bit loads and
4241 stores. */
4254 {
4259 }
4262 {
4263 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4264 (or .got.plt) section. We don't do this in the linker script
4265 because we don't want to define the symbol if we are not creating
4266 a global offset table. */
4272 /* Machine-specific: we want the symbol for executables as
4273 well. */
4276 }
4278 /* The first bit of the global offset table is the header. */
4281 /* This is the machine-specific part. Create and initialize section
4282 data for the got. */
4284 {
4287 frvfdpic_relocs_info_hash,
4288 frvfdpic_relocs_info_eq,
4301 /* Machine-specific. */
4311 }
4312 else
4313 {
4316 }
4318 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4319 turns out that we're linking with a different linker script, the
4320 linker script will override it. */
4331 /* Machine-specific: we want the symbol for executables as well. */
4338 /* FDPIC supports Thread Local Storage, and this may require a
4339 procedure linkage table for TLS PLT entries. */
4341 /* This is mostly copied from
4342 elflink.c:_bfd_elf_create_dynamic_sections(). */
4355 /* FRV-specific: remember it. */
4358 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4359 .plt section. */
4361 {
4367 }
4369 /* FRV-specific: we want rel relocations for the plt. */
4375 /* FRV-specific: remember it. */
4379 }
4381 /* Make sure the got and plt sections exist, and that our pointers in
4382 the link hash table point to them. */
4384 static bfd_boolean
4386 {
4387 /* This is mostly copied from
4388 elflink.c:_bfd_elf_create_dynamic_sections(). */
4389 flagword flags;
4396 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4397 .rel[a].bss sections. */
4399 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4400 way. */
4404 /* FRV-specific: make sure we created everything we wanted. */
4411 {
4412 /* The .dynbss section is a place to put symbols which are defined
4413 by dynamic objects, are referenced by regular objects, and are
4414 not functions. We must allocate space for them in the process
4415 image and use a R_*_COPY reloc to tell the dynamic linker to
4416 initialize them at run time. The linker script puts the .dynbss
4417 section into the .bss section of the final image. */
4423 /* The .rel[a].bss section holds copy relocs. This section is not
4424 normally needed. We need to create it here, though, so that the
4425 linker will map it to an output section. We can't just create it
4426 only if we need it, because we will not know whether we need it
4427 until we have seen all the input files, and the first time the
4428 main linker code calls BFD after examining all the input files
4429 (size_dynamic_sections) the input sections have already been
4430 mapped to the output sections. If the section turns out not to
4431 be needed, we can discard it later. We will never need this
4432 section when generating a shared object, since they do not use
4433 copy relocs. */
4435 {
4443 }
4444 }
4447 }
4449 /* Compute the total GOT and PLT size required by each symbol in each
4450 range. Symbols may require up to 4 words in the GOT: an entry
4451 pointing to the symbol, an entry pointing to its function
4452 descriptor, and a private function descriptors taking two
4453 words. */
4455 static void
4458 {
4459 /* Allocate space for a GOT entry pointing to the symbol. */
4466 else
4470 /* Allocate space for a GOT entry pointing to the function
4471 descriptor. */
4478 else
4482 /* Decide whether we need a PLT entry, a function descriptor in the
4483 GOT, and a lazy PLT entry for this symbol. */
4497 /* Allocate space for a function descriptor. */
4506 else
4512 }
4514 /* Compute the total GOT size required by each TLS symbol in each
4515 range. Symbols may require up to 5 words in the GOT: an entry
4516 holding the TLS offset for the symbol, and an entry with a full TLS
4517 descriptor taking 4 words. */
4519 static void
4522 bfd_boolean subtract)
4523 {
4526 /* Allocate space for a GOT entry with the TLS offset of the
4527 symbol. */
4534 else
4538 /* If there's any TLSOFF relocation, mark the output file as not
4539 suitable for dlopening. This mark will remain even if we relax
4540 all such relocations, but this is not a problem, since we'll only
4541 do so for executables, and we definitely don't want anyone
4542 dlopening executables. */
4546 /* Allocate space for a TLS descriptor. */
4555 else
4558 }
4560 /* Compute the number of dynamic relocations and fixups that a symbol
4561 requires, and add (or subtract) from the grand and per-symbol
4562 totals. */
4564 static void
4567 bfd_boolean subtract)
4568 {
4572 {
4576 /* In the executable, TLS relocations to symbols that bind
4577 locally (including those that resolve to global TLS offsets)
4578 are resolved immediately, without any need for fixups or
4579 dynamic relocations. In shared libraries, however, we must
4580 emit dynamic relocations even for local symbols, because we
4581 don't know the module id the library is going to get at
4582 run-time, nor its TLS base offset. */
4587 }
4588 else
4589 {
4591 {
4597 }
4598 else
4599 {
4602 }
4606 {
4610 }
4611 else
4613 }
4616 {
4620 }
4627 }
4629 /* Look for opportunities to relax TLS relocations. We can assume
4630 we're linking the main executable or a static-tls library, since
4631 otherwise we wouldn't have got here. When relaxing, we have to
4632 first undo any previous accounting of TLS uses of fixups, dynamic
4633 relocations, GOT and PLT entries. */
4635 static void
4638 bfd_boolean relaxing)
4639 {
4646 {
4648 {
4652 }
4654 /* When linking an executable, we can always decay GOTTLSDESC to
4655 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4656 When linking a static-tls shared library, using TLSMOFF is
4657 not an option, but we can still use GOTTLSOFF. When decaying
4658 to GOTTLSOFF, we must keep the GOT entry in range. We know
4659 it has to fit because we'll be trading the 4 words of hte TLS
4660 descriptor for a single word in the same range. */
4664 {
4668 }
4671 }
4673 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4674 main executable. We have to check whether the symbol's TLSOFF is
4675 in range for a setlos. For symbols with a hash entry, we can
4676 determine exactly what to do; for others locals, we don't have
4677 addresses handy, so we use the size of the TLS section as an
4678 approximation. If we get it wrong, we'll retain a GOT entry
4679 holding the TLS offset (without dynamic relocations or fixups),
4680 but we'll still optimize away the loads from it. Since TLS sizes
4681 are generally very small, it's probably not worth attempting to
4682 do better than this. */
4688 /* The above may hold for an undefweak TLS symbol, so make
4689 sure we don't have this case before accessing def.value
4690 and def.section. */
4702 {
4704 {
4708 }
4712 }
4714 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4715 have a #gottlsoff12 relocation for this entry, or if we can fit
4716 one more in the 12-bit (and 16-bit) ranges. */
4719 || (relaxing
4724 {
4726 {
4730 }
4734 }
4737 {
4740 }
4743 }
4745 /* Compute the total GOT and PLT size required by each symbol in each range. *
4746 Symbols may require up to 4 words in the GOT: an entry pointing to
4747 the symbol, an entry pointing to its function descriptor, and a
4748 private function descriptors taking two words. */
4750 static int
4752 {
4760 else
4761 {
4764 }
4767 }
4769 /* Determine the positive and negative ranges to be used by each
4770 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4771 double-word boundary, are the minimum (negative) and maximum
4772 (positive) GOT offsets already used by previous ranges, except for
4773 an ODD entry that may have been left behind. GOT and FD indicate
4774 the size of GOT entries and function descriptors that must be
4775 placed within the range from -WRAP to WRAP. If there's room left,
4776 up to FDPLT bytes should be reserved for additional function
4777 descriptors. */
4781 bfd_signed_vma fdcur,
4782 bfd_signed_vma odd,
4783 bfd_signed_vma cur,
4784 bfd_vma got,
4785 bfd_vma fd,
4786 bfd_vma fdplt,
4787 bfd_vma tlsd,
4788 bfd_vma tlsdplt,
4789 bfd_vma wrap)
4790 {
4794 /* Start at the given initial points. */
4798 /* If we had an incoming odd word and we have any got entries that
4799 are going to use it, consume it, otherwise leave gad->odd at
4800 zero. We might force gad->odd to zero and return the incoming
4801 odd such that it is used by the next range, but then GOT entries
4802 might appear to be out of order and we wouldn't be able to
4803 shorten the GOT by one word if it turns out to end with an
4804 unpaired GOT entry. */
4806 {
4810 }
4811 else
4814 /* If we're left with an unpaired GOT entry, compute its location
4815 such that we can return it. Otherwise, if got doesn't require an
4816 odd number of words here, either odd was already zero in the
4817 block above, or it was set to zero because got was non-zero, or
4818 got was already zero. In the latter case, we want the value of
4819 odd to carry over to the return statement, so we don't want to
4820 reset odd unless the condition below is true. */
4822 {
4825 }
4827 /* Compute the tentative boundaries of this range. */
4832 /* If function descriptors took too much space, wrap some of them
4833 around. */
4835 {
4838 }
4840 /* If GOT entries took too much space, wrap some of them around.
4841 This may well cause gad->min to become lower than wrapmin. This
4842 will cause a relocation overflow later on, so we don't have to
4843 report it here . */
4845 {
4848 }
4850 /* Add TLS descriptors. */
4855 /* If TLS descriptors took too much space, wrap an integral number
4856 of them around. */
4858 {
4866 }
4868 /* If there is space left and we have function descriptors
4869 referenced in PLT entries that could take advantage of shorter
4870 offsets, place them now. */
4872 {
4873 bfd_vma fds;
4877 else
4884 }
4886 /* If there is more space left, try to place some more function
4887 descriptors for PLT entries. */
4889 {
4890 bfd_vma fds;
4894 else
4901 }
4903 /* If there is space left and we have TLS descriptors referenced in
4904 PLT entries that could take advantage of shorter offsets, place
4905 them now. */
4907 {
4908 bfd_vma tlsds;
4912 else
4918 }
4920 /* If there is more space left, try to place some more TLS
4921 descriptors for PLT entries. Although we could try to fit an
4922 additional TLS descriptor with half of it just before before the
4923 wrap point and another right past the wrap point, this might
4924 cause us to run out of space for the next region, so don't do
4925 it. */
4927 {
4928 bfd_vma tlsds;
4932 else
4938 }
4940 /* If odd was initially computed as an offset past the wrap point,
4941 wrap it around. */
4945 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4946 before returning, so do it here too. This guarantees that,
4947 should cur and fdcur meet at the wrap point, they'll both be
4948 equal to min. */
4952 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4958 }
4960 /* Compute the location of the next GOT entry, given the allocation
4961 data for a range. */
4965 {
4966 bfd_signed_vma ret;
4969 {
4970 /* If there was an odd word left behind, use it. */
4973 }
4974 else
4975 {
4976 /* Otherwise, use the word pointed to by cur, reserve the next
4977 as an odd word, and skip to the next pair of words, possibly
4978 wrapping around. */
4984 }
4987 }
4989 /* Compute the location of the next function descriptor entry in the
4990 GOT, given the allocation data for a range. */
4994 {
4995 /* If we're at the bottom, wrap around, and only then allocate the
4996 next pair of words. */
5000 }
5002 /* Compute the location of the next TLS descriptor entry in the GOT,
5003 given the allocation data for a range. */
5006 {
5007 bfd_signed_vma ret;
5013 /* If we're at the top of the region, wrap around to the bottom. */
5018 }
5020 /* Assign GOT offsets for every GOT entry and function descriptor.
5021 Doing everything in a single pass is tricky. */
5023 static int
5025 {
5046 {
5049 }
5053 {
5056 }
5058 {
5061 }
5075 {
5078 }
5082 {
5085 }
5087 {
5090 }
5095 }
5097 /* Assign GOT offsets to private function descriptors used by PLT
5098 entries (or referenced by 32-bit offsets), as well as PLT entries
5099 and lazy PLT entries. */
5101 static int
5103 {
5111 {
5114 /* We use the section's raw size to mark the location of the
5115 next PLT entry. */
5118 /* Figure out the length of this PLT entry based on the
5119 addressing mode we need to reach the function descriptor. */
5127 else
5131 }
5134 {
5137 /* If this entry is the one that gets the resolver stub, account
5138 for the additional instruction. */
5142 }
5145 {
5148 entry->tlsplt_entry
5154 {
5156 /* FIXME: here we use the size of the TLS section
5157 as an upper bound for the value of the TLS
5158 symbol, because we may not know the exact value
5159 yet. If we get it wrong, we'll just waste a
5160 word in the PLT, and we should never get even
5161 close to 32 KiB of TLS anyway. */
5166 else
5168 }
5170 {
5177 else
5179 }
5180 else
5181 {
5190 else
5192 }
5195 }
5198 }
5200 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5201 _frvfdpic_assign_plt_entries. */
5203 static int
5205 {
5218 }
5220 /* Follow indirect and warning hash entries so that each got entry
5221 points to the final symbol definition. P must point to a pointer
5222 to the hash table we're traversing. Since this traversal may
5223 modify the hash table, we set this pointer to NULL to indicate
5224 we've made a potentially-destructive change to the hash table, so
5225 the traversal must be restarted. */
5226 static int
5228 {
5233 {
5245 NO_INSERT);
5248 {
5249 /* Merge the two entries. */
5253 }
5257 /* If we can't find this entry with the new bfd hash, re-insert
5258 it, and get the traversal restarted. */
5260 {
5265 /* Abort the traversal, since the whole table may have
5266 moved, and leave it up to the parent to restart the
5267 process. */
5270 }
5271 }
5274 }
5276 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5277 section and the rofixup section. Assign locations for GOT and PLT
5278 entries. */
5280 static bfd_boolean
5283 {
5284 bfd_signed_vma odd;
5293 /* Compute the total size taken by entries in the 12-bit and 16-bit
5294 ranges, to tell how many PLT function descriptors we can bring
5295 into the 12-bit range without causing the 16-bit range to
5296 overflow. */
5302 else
5305 {
5308 }
5309 else
5314 /* Determine the ranges of GOT offsets that we can use for each
5315 range of addressing modes. */
5318 odd,
5322 limit,
5324 tlslimit,
5328 odd,
5340 odd,
5353 /* Now assign (most) GOT offsets. */
5355 gpinfop);
5359 /* If an odd word is the last word of the GOT, we don't need this
5360 word to be part of the GOT. */
5366 {
5369 }
5370 /* This will be non-NULL during relaxation. The assumption is that
5371 the size of one of these sections will never grow, only shrink,
5372 so we can use the larger buffer we allocated before. */
5374 {
5380 }
5383 /* Subtract the number of lzplt entries, since those will generate
5384 relocations in the pltrel section. */
5388 else
5393 {
5399 }
5405 {
5411 }
5414 {
5421 {
5427 }
5428 }
5430 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5431 such that there's room for the additional instruction needed to
5432 call the resolver. Since _frvfdpic_assign_got_entries didn't
5433 account for them, our block size is 4 bytes smaller than the real
5434 block size. */
5436 {
5440 }
5442 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5443 actually assign lazy PLT entries addresses. */
5446 /* Save information that we're going to need to generate GOT and PLT
5447 entries. */
5458 /* Allocate a ret statement at plt_initial_offset, to be used by
5459 locally-resolved TLS descriptors. */
5464 gpinfop);
5466 /* Allocate the PLT section contents only after
5467 _frvfdpic_assign_plt_entries has a chance to add the size of the
5468 non-lazy PLT entries. */
5470 {
5474 {
5480 }
5481 }
5484 }
5486 /* Set the sizes of the dynamic sections. */
5488 static bfd_boolean
5491 {
5500 {
5501 /* Set the contents of the .interp section to the interpreter. */
5503 {
5508 }
5509 }
5515 {
5522 }
5527 /* Allocate space to save the summary information, we're going to
5528 use it if we're doing relaxations. */
5535 {
5552 }
5555 }
5557 static bfd_boolean
5560 {
5562 {
5565 /* Force a PT_GNU_STACK segment to be created. */
5569 /* Define __stacksize if it's not defined yet. */
5575 {
5588 /* This one must NOT be hidden. */
5589 }
5590 }
5593 }
5595 /* Check whether any of the relocations was optimized away, and
5596 subtract it from the relocation or fixup count. */
5597 static bfd_boolean
5602 {
5616 /* Now examine each relocation. */
5618 {
5636 else
5637 {
5642 }
5648 else
5665 }
5668 }
5670 static bfd_boolean
5674 {
5679 /* Account for relaxation of .eh_frame section. */
5682 {
5686 }
5689 {
5696 /* Clear GOT and PLT assignments. */
5698 _frvfdpic_reset_got_plt_entries,
5699 NULL);
5703 }
5706 }
5708 /* Look for opportunities to relax TLS relocations. We can assume
5709 we're linking the main executable or a static-tls library, since
5710 otherwise we wouldn't have got here. */
5712 static int
5714 {
5721 }
5723 static bfd_boolean
5726 {
5733 /* If we return early, we didn't change anything. */
5736 /* We'll do our thing when requested to relax the GOT section. */
5740 /* We can only relax when linking the main executable or a library
5741 that can't be dlopened. */
5745 /* If there isn't a TLS section for this binary, we can't do
5746 anything about its TLS relocations (it probably doesn't have
5747 any. */
5754 /* Now look for opportunities to relax, adjusting the GOT usage
5755 as needed. */
5757 _frvfdpic_relax_got_plt_entries,
5760 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5763 {
5764 /* Clear GOT and PLT assignments. */
5766 _frvfdpic_reset_got_plt_entries,
5767 NULL);
5769 /* The owner of the TLS section is the output bfd. There should
5770 be a better way to get to it. */
5775 /* Repeat until we don't make any further changes. We could fail to
5776 introduce changes in a round if, for example, the 12-bit range is
5777 full, but we later release some space by getting rid of TLS
5778 descriptors in it. We have to repeat the whole process because
5779 we might have changed the size of a section processed before this
5780 one. */
5782 }
5785 }
5787 static bfd_boolean
5790 {
5795 /* objcopy and strip preserve what's already there using
5796 elf32_frvfdpic_copy_private_bfd_data (). */
5805 {
5808 /* Obtain the pointer to the __stacksize symbol. */
5812 {
5817 }
5819 /* Set the header p_memsz from the symbol value. We
5820 intentionally ignore the symbol section. */
5823 else
5827 }
5830 }
5832 /* Fill in code and data in dynamic sections. */
5834 static bfd_boolean
5837 {
5838 /* Nothing to be done for non-FDPIC. */
5840 }
5842 static bfd_boolean
5845 {
5852 {
5854 }
5856 {
5862 {
5874 {
5875 error:
5879 }
5887 {
5888 bfd_vma value =
5897 }
5898 }
5899 }
5901 {
5905 }
5909 {
5921 {
5922 Elf_Internal_Dyn dyn;
5927 {
5949 }
5950 }
5951 }
5954 }
5956 /* Adjust a symbol defined by a dynamic object and referenced by a
5957 regular object. */
5959 static bfd_boolean
5960 elf32_frvfdpic_adjust_dynamic_symbol
5963 {
5968 /* Make sure we know what is going on here. */
5975 /* If this is a weak symbol, and there is a real definition, the
5976 processor independent code will have arranged for us to see the
5977 real definition first, and we can just use the same value. */
5979 {
5984 }
5987 }
5989 /* Perform any actions needed for dynamic symbols. */
5991 static bfd_boolean
5992 elf32_frvfdpic_finish_dynamic_symbol
5997 {
5999 }
6001 /* Decide whether to attempt to turn absptr or lsda encodings in
6002 shared libraries into pcrel within the given input section. */
6004 static bfd_boolean
6005 frvfdpic_elf_use_relative_eh_frame
6009 {
6010 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
6012 }
6014 /* Adjust the contents of an eh_frame_hdr section before they're output. */
6016 static bfd_byte
6022 {
6034 == (_frvfdpic_osec_to_segment
6043 }
6045 /* Look through the relocs for a section during the first phase.
6047 Besides handling virtual table relocs for gc, we have to deal with
6048 all sorts of PIC-related relocations. We describe below the
6049 general plan on how to handle such relocations, even though we only
6050 collect information at this point, storing them in hash tables for
6051 perusal of later passes.
6053 32 relocations are propagated to the linker output when creating
6054 position-independent output. LO16 and HI16 relocations are not
6055 supposed to be encountered in this case.
6057 LABEL16 should always be resolvable by the linker, since it's only
6058 used by branches.
6060 LABEL24, on the other hand, is used by calls. If it turns out that
6061 the target of a call is a dynamic symbol, a PLT entry must be
6062 created for it, which triggers the creation of a private function
6063 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
6065 GPREL relocations require the referenced symbol to be in the same
6066 segment as _gp, but this can only be checked later.
6068 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
6069 exist. LABEL24 might as well, since it may require a PLT entry,
6070 that will require a got.
6072 Non-FUNCDESC GOT relocations require a GOT entry to be created
6073 regardless of whether the symbol is dynamic. However, since a
6074 global symbol that turns out to not be exported may have the same
6075 address of a non-dynamic symbol, we don't assign GOT entries at
6076 this point, such that we can share them in this case. A relocation
6077 for the GOT entry always has to be created, be it to offset a
6078 private symbol by the section load address, be it to get the symbol
6079 resolved dynamically.
6081 FUNCDESC GOT relocations require a GOT entry to be created, and
6082 handled as if a FUNCDESC relocation was applied to the GOT entry in
6083 an object file.
6085 FUNCDESC relocations referencing a symbol that turns out to NOT be
6086 dynamic cause a private function descriptor to be created. The
6087 FUNCDESC relocation then decays to a 32 relocation that points at
6088 the private descriptor. If the symbol is dynamic, the FUNCDESC
6089 relocation is propagated to the linker output, such that the
6090 dynamic linker creates the canonical descriptor, pointing to the
6091 dynamically-resolved definition of the function.
6093 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
6094 symbols that are assigned to the same segment as the GOT, but we
6095 can only check this later, after we know the complete set of
6096 symbols defined and/or exported.
6098 FUNCDESC GOTOFF relocations require a function descriptor to be
6099 created and, unless lazy binding is disabled or the symbol is not
6100 dynamic, a lazy PLT entry. Since we can't tell at this point
6101 whether a symbol is going to be dynamic, we have to decide later
6102 whether to create a lazy PLT entry or bind the descriptor directly
6103 to the private function.
6105 FUNCDESC_VALUE relocations are not supposed to be present in object
6106 files, but they may very well be simply propagated to the linker
6107 output, since they have no side effect.
6110 A function descriptor always requires a FUNCDESC_VALUE relocation.
6111 Whether it's in .plt.rel or not depends on whether lazy binding is
6112 enabled and on whether the referenced symbol is dynamic.
6114 The existence of a lazy PLT requires the resolverStub lazy PLT
6115 entry to be present.
6118 As for assignment of GOT, PLT and lazy PLT entries, and private
6119 descriptors, we might do them all sequentially, but we can do
6120 better than that. For example, we can place GOT entries and
6121 private function descriptors referenced using 12-bit operands
6122 closer to the PIC register value, such that these relocations don't
6123 overflow. Those that are only referenced with LO16 relocations
6124 could come next, but we may as well place PLT-required function
6125 descriptors in the 12-bit range to make them shorter. Symbols
6126 referenced with LO16/HI16 may come next, but we may place
6127 additional function descriptors in the 16-bit range if we can
6128 reliably tell that we've already placed entries that are ever
6129 referenced with only LO16. PLT entries are therefore generated as
6130 small as possible, while not introducing relocation overflows in
6131 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6132 generated before or after PLT entries, but not intermingled with
6133 them, such that we can have more lazy PLT entries in range for a
6134 branch to the resolverStub. The resolverStub should be emitted at
6135 the most distant location from the first lazy PLT entry such that
6136 it's still in range for a branch, or closer, if there isn't a need
6137 for so many lazy PLT entries. Additional lazy PLT entries may be
6138 emitted after the resolverStub, as long as branches are still in
6139 range. If the branch goes out of range, longer lazy PLT entries
6140 are emitted.
6142 We could further optimize PLT and lazy PLT entries by giving them
6143 priority in assignment to closer-to-gr17 locations depending on the
6144 number of occurrences of references to them (assuming a function
6145 that's called more often is more important for performance, so its
6146 PLT entry should be faster), or taking hints from the compiler.
6147 Given infinite time and money... :-) */
6149 static bfd_boolean
6155 {
6172 {
6179 else
6180 {
6185 }
6188 {
6218 /* Fall through. */
6226 {
6230 }
6232 {
6235 }
6237 {
6240 {
6247 }
6248 picrel
6252 }
6253 else
6264 }
6267 {
6277 /* Fall through. */
6365 /* This relocation describes the C++ object vtable hierarchy.
6366 Reconstruct it for later use during GC. */
6372 /* This relocation describes which C++ vtable entries are actually
6373 used. Record for later use during GC. */
6395 bad_reloc:
6400 }
6401 }
6404 }
6406 \f
6407 /* Return the machine subcode from the ELF e_flags header. */
6409 static int
6412 {
6414 {
6424 }
6427 }
6429 /* Set the right machine number for a FRV ELF file. */
6431 static bfd_boolean
6434 {
6438 }
6439 \f
6440 /* Function to set the ELF flag bits. */
6442 static bfd_boolean
6445 flagword flags;
6446 {
6450 }
6452 /* Copy backend specific data from one object module to another. */
6454 static bfd_boolean
6458 {
6469 /* Copy object attributes. */
6473 }
6475 /* Return true if the architecture described by elf header flag
6476 EXTENSION is an extension of the architecture described by BASE. */
6478 static bfd_boolean
6480 {
6484 /* CPU_GENERIC code can be merged with code for a specific
6485 architecture, in which case the result is marked as being
6486 for the specific architecture. Everything is therefore
6487 an extension of CPU_GENERIC. */
6500 }
6502 static bfd_boolean
6504 {
6518 /* Copy the stack size. */
6521 {
6526 {
6529 /* Rewrite the phdrs, since we're only called after they
6530 were first written. */
6538 }
6541 }
6544 }
6546 /* Merge backend specific data from an object file to the output
6547 object file when linking. */
6549 static bfd_boolean
6553 {
6567 #ifdef DEBUG
6571 #endif
6574 {
6577 }
6580 ;
6583 {
6584 /* Warn if different # of gprs are used. Note, 0 means nothing is
6585 said about the size of gprs. */
6589 ;
6592 ;
6597 else
6598 {
6600 {
6604 }
6607 {
6611 }
6612 }
6614 /* Warn if different # of fprs are used. Note, 0 means nothing is
6615 said about the size of fprs. */
6619 ;
6622 ;
6627 else
6628 {
6630 {
6635 }
6638 {
6643 }
6644 }
6646 /* Warn if different dword support was used. Note, 0 means nothing is
6647 said about the dword support. */
6651 ;
6654 ;
6659 else
6660 {
6662 {
6666 }
6669 {
6673 }
6674 }
6676 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6677 feature is used. */
6679 | EF_FRV_MEDIA
6680 | EF_FRV_MULADD
6683 /* If any module was compiled without -G0, clear the G0 bit. */
6687 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6691 /* We don't have to do anything if the pic flags are the same, or the new
6692 module(s) were compiled with -mlibrary-pic. */
6696 ;
6698 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6699 flags if any from the new module. */
6703 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6707 /* One module was compiled for pic and the other was not, see if we have
6708 had any relocations that are not pic-safe. */
6709 else
6710 {
6713 else
6714 {
6716 #ifndef FRV_NO_PIC_ERROR
6722 #endif
6723 }
6724 }
6726 /* Warn if different cpu is used (allow a specific cpu to override
6727 the generic cpu). */
6731 ;
6736 else
6737 {
6739 {
6750 }
6753 {
6764 }
6765 }
6767 /* Print out any mismatches from above. */
6769 {
6774 }
6776 /* Warn about any other mismatches */
6780 {
6786 }
6787 }
6789 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6793 /* Update the old flags now with changes made above. */
6801 {
6807 else
6811 }
6817 }
6819 \f
6820 bfd_boolean
6823 PTR ptr;
6824 {
6826 flagword flags;
6830 /* Print normal ELF private data. */
6837 {
6847 }
6850 {
6854 }
6857 {
6862 }
6865 {
6869 }
6900 }
6902 \f
6903 /* Support for core dump NOTE sections. */
6905 static bfd_boolean
6907 {
6912 {
6916 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6917 hardcoded offsets and sizes listed below (and contained within
6918 this lexical block) refer to fields in the target's elf_prstatus
6919 struct. */
6921 /* `pr_cursig' is at offset 12. */
6924 /* `pr_pid' is at offset 24. */
6927 /* `pr_reg' is at offset 72. */
6930 /* Most grok_prstatus implementations set `raw_size' to the size
6931 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6932 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6933 and `pr_interp_fdpic_loadmap', both of which (by design)
6934 immediately follow `pr_reg'. This will allow these fields to
6935 be viewed by GDB as registers.
6937 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6938 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6942 }
6944 /* Make a ".reg/999" section. */
6947 }
6949 static bfd_boolean
6951 {
6953 {
6957 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6960 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6964 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6967 }
6969 /* Note that for some reason, a spurious space is tacked
6970 onto the end of the args in some (at least one anyway)
6971 implementations, so strip it off if it exists. */
6973 {
6979 }
6982 }
6983 #define ELF_ARCH bfd_arch_frv
6984 #define ELF_TARGET_ID FRV_ELF_DATA
6985 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6986 #define ELF_MAXPAGESIZE 0x1000
6988 #define TARGET_BIG_SYM bfd_elf32_frv_vec
6991 #define elf_info_to_howto frv_info_to_howto_rela
6992 #define elf_backend_relocate_section elf32_frv_relocate_section
6993 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6994 #define elf_backend_check_relocs elf32_frv_check_relocs
6995 #define elf_backend_object_p elf32_frv_object_p
6996 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
6998 #define elf_backend_can_gc_sections 1
6999 #define elf_backend_rela_normal 1
7001 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
7002 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
7003 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
7004 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
7005 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
7006 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
7008 #define elf_backend_want_got_sym 1
7009 #define elf_backend_got_header_size 0
7010 #define elf_backend_want_got_plt 0
7011 #define elf_backend_plt_readonly 1
7012 #define elf_backend_want_plt_sym 0
7013 #define elf_backend_plt_header_size 0
7015 #define elf_backend_finish_dynamic_sections \
7016 elf32_frv_finish_dynamic_sections
7018 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
7019 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
7023 #undef ELF_MAXPAGESIZE
7024 #define ELF_MAXPAGESIZE 0x4000
7026 #undef TARGET_BIG_SYM
7027 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
7028 #undef TARGET_BIG_NAME
7030 #undef elf32_bed
7031 #define elf32_bed elf32_frvfdpic_bed
7033 #undef elf_info_to_howto_rel
7034 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
7036 #undef bfd_elf32_bfd_link_hash_table_create
7037 #define bfd_elf32_bfd_link_hash_table_create \
7038 frvfdpic_elf_link_hash_table_create
7039 #undef elf_backend_always_size_sections
7040 #define elf_backend_always_size_sections \
7041 elf32_frvfdpic_always_size_sections
7042 #undef elf_backend_modify_program_headers
7043 #define elf_backend_modify_program_headers \
7044 elf32_frvfdpic_modify_program_headers
7045 #undef bfd_elf32_bfd_copy_private_bfd_data
7046 #define bfd_elf32_bfd_copy_private_bfd_data \
7047 elf32_frvfdpic_copy_private_bfd_data
7049 #undef elf_backend_create_dynamic_sections
7050 #define elf_backend_create_dynamic_sections \
7051 elf32_frvfdpic_create_dynamic_sections
7052 #undef elf_backend_adjust_dynamic_symbol
7053 #define elf_backend_adjust_dynamic_symbol \
7054 elf32_frvfdpic_adjust_dynamic_symbol
7055 #undef elf_backend_size_dynamic_sections
7056 #define elf_backend_size_dynamic_sections \
7057 elf32_frvfdpic_size_dynamic_sections
7058 #undef bfd_elf32_bfd_relax_section
7059 #define bfd_elf32_bfd_relax_section \
7060 elf32_frvfdpic_relax_section
7061 #undef elf_backend_finish_dynamic_symbol
7062 #define elf_backend_finish_dynamic_symbol \
7063 elf32_frvfdpic_finish_dynamic_symbol
7064 #undef elf_backend_finish_dynamic_sections
7065 #define elf_backend_finish_dynamic_sections \
7066 elf32_frvfdpic_finish_dynamic_sections
7068 #undef elf_backend_discard_info
7069 #define elf_backend_discard_info \
7070 frvfdpic_elf_discard_info
7071 #undef elf_backend_can_make_relative_eh_frame
7072 #define elf_backend_can_make_relative_eh_frame \
7073 frvfdpic_elf_use_relative_eh_frame
7074 #undef elf_backend_can_make_lsda_relative_eh_frame
7075 #define elf_backend_can_make_lsda_relative_eh_frame \
7076 frvfdpic_elf_use_relative_eh_frame
7077 #undef elf_backend_encode_eh_address
7078 #define elf_backend_encode_eh_address \
7079 frvfdpic_elf_encode_eh_address
7081 #undef elf_backend_may_use_rel_p
7082 #define elf_backend_may_use_rel_p 1
7083 #undef elf_backend_may_use_rela_p
7084 #define elf_backend_may_use_rela_p 1
7085 /* We use REL for dynamic relocations only. */
7086 #undef elf_backend_default_use_rela_p
7087 #define elf_backend_default_use_rela_p 1
7089 #undef elf_backend_omit_section_dynsym
7090 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym