| blob | 8d940c089086556200870b275de6337059101f5f |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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
2800 }
2801 else
2802 {
2803 bfd_boolean warned;
2804 bfd_boolean unresolved_reloc;
2811 }
2814 {
2815 /* For relocs against symbols from removed linkonce sections,
2816 or sections discarded by a linker script, we just want the
2817 section contents zeroed. Avoid any special processing. */
2822 }
2832 {
2835 }
2838 {
2878 else
2879 /* In order to find the entry we created before, we must
2880 use the original addend, not the one that may have been
2881 modified by _bfd_elf_rela_local_sym(). */
2891 {
2896 }
2901 non_fdpic:
2904 {
2909 }
2911 }
2914 {
2937 }
2939 /* Try to apply TLS relaxations. */
2942 {
2944 #define LOCAL_EXEC_P(info, picrel) \
2945 ((info)->executable \
2946 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2947 #define INITIAL_EXEC_P(info, picrel) \
2948 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2949 && (picrel)->tlsoff_entry)
2951 #define IN_RANGE_FOR_OFST12_P(value) \
2952 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2953 #define IN_RANGE_FOR_SETLOS_P(value) \
2954 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2955 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2956 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2958 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2959 (LOCAL_EXEC_P ((info), (picrel)) \
2960 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2961 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2962 (INITIAL_EXEC_P ((info), (picrel)) \
2963 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2965 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2966 (LOCAL_EXEC_P ((info), (picrel)))
2967 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2968 (INITIAL_EXEC_P ((info), (picrel)))
2970 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2971 (LOCAL_EXEC_P ((info), (picrel)) \
2972 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2977 /* Is this a call instruction? */
2979 {
2985 }
2989 {
2990 /* Replace the call instruction (except the packing bit)
2991 with setlos #tlsmofflo(symbol+offset), gr9. */
2999 }
3002 {
3003 /* Replace the call instruction (except the packing bit)
3004 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
3012 }
3019 /* Is this an lddi instruction? */
3021 {
3027 }
3032 info))
3033 {
3034 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3035 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3036 Preserve the packing bit. */
3046 }
3050 {
3051 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3052 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3053 Preserve the packing bit. */
3063 }
3066 {
3067 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3068 with ldi @(grB, #gottlsoff12(symbol+offset),
3069 gr<C+1>. Preserve the packing bit. If gottlsoff12
3070 overflows, we'll error out, but that's sort-of ok,
3071 since we'd started with gottlsdesc12, that's actually
3072 more demanding. Compiling with -fPIE instead of
3073 -fpie would fix it; linking with --relax should fix
3074 it as well. */
3083 }
3090 /* Is this a sethi instruction? */
3092 {
3098 }
3104 {
3105 /* Replace sethi with a nop. Preserve the packing bit. */
3110 /* Nothing to relocate. */
3112 }
3115 {
3116 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3120 }
3127 /* Is this a setlo or setlos instruction? */
3129 {
3136 }
3142 {
3143 /* Replace setlo/setlos with a nop. Preserve the
3144 packing bit. */
3149 /* Nothing to relocate. */
3151 }
3154 {
3155 /* If the corresponding sethi (if it exists) decayed
3156 to a nop, make sure this becomes (or already is) a
3157 setlos, not setlo. */
3159 {
3162 }
3164 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3168 }
3175 /* Is this an ldd instruction? */
3177 {
3183 }
3188 info))
3189 {
3190 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3191 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3192 Preserve the packing bit. */
3202 }
3206 {
3207 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3208 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3209 Preserve the packing bit. */
3219 }
3223 {
3224 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3225 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3226 Preserve the packing bit. */
3236 }
3239 {
3240 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3241 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3242 Preserve the packing bit. */
3248 /* #tlsoff(symbol+offset) is just a relaxation
3249 annotation, so there's nothing left to
3250 relocate. */
3252 }
3259 /* Is this a calll or callil instruction? */
3261 {
3268 }
3273 info))
3274 {
3275 /* Replace calll with a nop. Preserve the packing bit. */
3280 /* Nothing to relocate. */
3282 }
3286 {
3287 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3288 Preserve the packing bit. */
3296 }
3299 {
3300 /* Replace calll with a nop. Preserve the packing bit. */
3305 /* Nothing to relocate. */
3307 }
3314 /* Is this an ldi instruction? */
3316 {
3322 }
3326 {
3327 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3328 with setlos #tlsmofflo(symbol+offset), grC.
3329 Preserve the packing bit. */
3337 }
3344 /* Is this a sethi instruction? */
3346 {
3352 }
3358 {
3359 /* Replace sethi with a nop. Preserve the packing bit. */
3364 /* Nothing to relocate. */
3366 }
3373 /* Is this a setlo or setlos instruction? */
3375 {
3382 }
3388 {
3389 /* Replace setlo/setlos with a nop. Preserve the
3390 packing bit. */
3395 /* Nothing to relocate. */
3397 }
3404 /* Is this an ld instruction? */
3406 {
3412 }
3416 {
3417 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3418 with setlos #tlsmofflo(symbol+offset), grC.
3419 Preserve the packing bit. */
3427 }
3431 {
3432 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3433 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3434 Preserve the packing bit. */
3442 }
3449 /* Is this a sethi instruction? */
3451 {
3457 }
3460 info))
3461 {
3462 /* Replace sethi with a nop. Preserve the packing bit. */
3467 /* Nothing to relocate. */
3469 }
3476 /* Is this a setlo or setlos instruction? */
3478 {
3485 }
3488 info))
3489 /* If the corresponding sethi (if it exists) decayed
3490 to a nop, make sure this becomes (or already is) a
3491 setlos, not setlo. */
3492 {
3495 }
3499 /*
3500 There's nothing to relax in these:
3501 R_FRV_TLSDESC_VALUE
3502 R_FRV_TLSOFF
3503 R_FRV_TLSMOFF12
3504 R_FRV_TLSMOFFHI
3505 R_FRV_TLSMOFFLO
3506 R_FRV_TLSMOFF
3507 */
3511 }
3514 {
3520 {
3525 }
3526 /* We don't want to warn on calls to undefined weak symbols,
3527 as calls to them must be protected by non-NULL tests
3528 anyway, and unprotected calls would invoke undefined
3529 behavior. */
3533 else
3573 {
3579 {
3580 /* If the symbol is dynamic and there may be dynamic
3581 symbol resolution because we are or are linked with a
3582 shared library, emit a FUNCDESC relocation such that
3583 the dynamic linker will allocate the function
3584 descriptor. If the symbol needs a non-local function
3585 descriptor but binds locally (e.g., its visibility is
3586 protected, emit a dynamic relocation decayed to
3587 section+offset. */
3591 {
3596 }
3598 {
3600 {
3605 }
3607 }
3608 else
3609 {
3610 /* Otherwise, we know we have a private function
3611 descriptor, so reference it directly. */
3619 }
3621 /* If there is room for dynamic symbol resolution, emit
3622 the dynamic relocation. However, if we're linking an
3623 executable at a fixed location, we won't have emitted a
3624 dynamic symbol entry for the got section, so idx will
3625 be zero, which means we can and should compute the
3626 address of the private descriptor ourselves. */
3629 {
3634 {
3635 bfd_vma offset;
3638 input_section
3640 {
3646 }
3648 offset = _bfd_elf_section_offset
3654 frvfdpic_gotfixup_section
3656 offset + input_section
3659 picrel);
3660 }
3661 }
3665 {
3666 bfd_vma offset;
3669 input_section
3671 {
3677 }
3679 offset = _bfd_elf_section_offset
3686 offset + input_section
3690 }
3691 else
3693 }
3695 /* We want the addend in-place because dynamic
3696 relocations are REL. Setting relocation to it should
3697 arrange for it to be installed. */
3699 }
3705 {
3708 }
3709 /* Fall through. */
3711 {
3715 /* If the symbol is dynamic but binds locally, use
3716 section+offset. */
3718 {
3720 {
3725 }
3727 }
3728 else
3729 {
3732 else
3740 else
3742 }
3744 /* If we're linking an executable at a fixed address, we
3745 can omit the dynamic relocation as long as the symbol
3746 is defined in the current link unit (which is implied
3747 by its output section not being NULL). */
3750 {
3757 {
3759 input_section
3761 {
3767 }
3769 {
3770 bfd_vma offset = _bfd_elf_section_offset
3775 {
3777 frvfdpic_gotfixup_section
3779 offset + input_section
3782 picrel);
3784 _frvfdpic_add_rofixup
3787 offset
3790 }
3791 }
3792 }
3793 }
3794 else
3795 {
3799 {
3800 bfd_vma offset;
3803 input_section
3805 {
3811 }
3813 offset = _bfd_elf_section_offset
3820 offset + input_section
3824 }
3827 /* We want the addend in-place because dynamic
3828 relocations are REL. Setting relocation to it
3829 should arrange for it to be installed. */
3831 }
3834 {
3835 /* If we've omitted the dynamic relocation, just emit
3836 the fixed addresses of the symbol and of the local
3837 GOT base offset. */
3845 else
3846 /* A function descriptor used for lazy or local
3847 resolving is initialized such that its high word
3848 contains the output section index in which the
3849 PLT entries are located, and the low word
3850 contains the offset of the lazy PLT entry entry
3851 point into that section. */
3856 sec
3859 }
3860 }
3907 {
3910 }
3912 {
3916 }
3917 else
3936 /* These shouldn't be present in input object files. */
3943 /* These are just annotations for relaxation, nothing to do
3944 here. */
3953 }
3956 {
3957 /* If you take this out, remove the #error from fdpic-static-6.d
3958 in the ld testsuite. */
3959 /* This helps catch problems in GCC while we can't do more
3960 than static linking. The idea is to test whether the
3961 input file basename is crt0.o only once. */
3963 silence_segment_error =
3972 /* We don't want duplicate errors for undefined
3973 symbols. */
3976 {
3982 else
3987 }
3991 }
3994 {
3997 /* We need the addend to be applied before we shift the
3998 value right. */
4000 /* Fall through. */
4007 /* Fall through. */
4021 }
4024 {
4028 /* Fall through. */
4030 /* When referencing a GOT entry, a function descriptor or a
4031 PLT, we don't want the addend to apply to the reference,
4032 but rather to the referenced symbol. The actual entry
4033 will have already been created taking the addend into
4034 account, so cancel it out here. */
4051 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
4052 here, since we do want to apply the addend to the others.
4053 Note that we've applied the addend to GOTOFFHI before we
4054 shifted it right. */
4062 }
4094 else
4099 {
4103 {
4130 }
4133 {
4138 }
4142 }
4143 }
4146 }
4147 \f
4148 /* Return the section that should be marked against GC for a given
4149 relocation. */
4157 {
4160 {
4164 }
4167 }
4168 \f
4169 /* Hook called by the linker routine which adds symbols from an object
4170 file. We use it to put .comm items in .scomm, and not .comm. */
4172 static bfd_boolean
4181 {
4185 {
4186 /* Common symbols less than or equal to -G nn bytes are
4187 automatically put into .sbss. */
4192 {
4194 (SEC_ALLOC
4195 | SEC_IS_COMMON
4199 }
4203 }
4206 }
4208 /* We need dynamic symbols for every section, since segments can
4209 relocate independently. */
4210 static bfd_boolean
4213 ATTRIBUTE_UNUSED,
4215 {
4217 {
4220 /* If sh_type is yet undecided, assume it could be
4221 SHT_PROGBITS/SHT_NOBITS. */
4225 /* There shouldn't be section relative relocations
4226 against any other section. */
4229 }
4230 }
4232 /* Create a .got section, as well as its additional info field. This
4233 is almost entirely copied from
4234 elflink.c:_bfd_elf_create_got_section(). */
4236 static bfd_boolean
4238 {
4247 /* This function may be called more than once. */
4252 /* Machine specific: although pointers are 32-bits wide, we want the
4253 GOT to be aligned to a 64-bit boundary, such that function
4254 descriptors in it can be accessed with 64-bit loads and
4255 stores. */
4268 {
4273 }
4276 {
4277 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4278 (or .got.plt) section. We don't do this in the linker script
4279 because we don't want to define the symbol if we are not creating
4280 a global offset table. */
4286 /* Machine-specific: we want the symbol for executables as
4287 well. */
4290 }
4292 /* The first bit of the global offset table is the header. */
4295 /* This is the machine-specific part. Create and initialize section
4296 data for the got. */
4298 {
4301 frvfdpic_relocs_info_hash,
4302 frvfdpic_relocs_info_eq,
4315 /* Machine-specific. */
4325 }
4326 else
4327 {
4330 }
4332 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4333 turns out that we're linking with a different linker script, the
4334 linker script will override it. */
4345 /* Machine-specific: we want the symbol for executables as well. */
4352 /* FDPIC supports Thread Local Storage, and this may require a
4353 procedure linkage table for TLS PLT entries. */
4355 /* This is mostly copied from
4356 elflink.c:_bfd_elf_create_dynamic_sections(). */
4369 /* FRV-specific: remember it. */
4372 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4373 .plt section. */
4375 {
4381 }
4383 /* FRV-specific: we want rel relocations for the plt. */
4389 /* FRV-specific: remember it. */
4393 }
4395 /* Make sure the got and plt sections exist, and that our pointers in
4396 the link hash table point to them. */
4398 static bfd_boolean
4400 {
4401 /* This is mostly copied from
4402 elflink.c:_bfd_elf_create_dynamic_sections(). */
4403 flagword flags;
4410 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4411 .rel[a].bss sections. */
4413 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4414 way. */
4418 /* FRV-specific: make sure we created everything we wanted. */
4425 {
4426 /* The .dynbss section is a place to put symbols which are defined
4427 by dynamic objects, are referenced by regular objects, and are
4428 not functions. We must allocate space for them in the process
4429 image and use a R_*_COPY reloc to tell the dynamic linker to
4430 initialize them at run time. The linker script puts the .dynbss
4431 section into the .bss section of the final image. */
4437 /* The .rel[a].bss section holds copy relocs. This section is not
4438 normally needed. We need to create it here, though, so that the
4439 linker will map it to an output section. We can't just create it
4440 only if we need it, because we will not know whether we need it
4441 until we have seen all the input files, and the first time the
4442 main linker code calls BFD after examining all the input files
4443 (size_dynamic_sections) the input sections have already been
4444 mapped to the output sections. If the section turns out not to
4445 be needed, we can discard it later. We will never need this
4446 section when generating a shared object, since they do not use
4447 copy relocs. */
4449 {
4457 }
4458 }
4461 }
4463 /* Compute the total GOT and PLT size required by each symbol in each
4464 range. Symbols may require up to 4 words in the GOT: an entry
4465 pointing to the symbol, an entry pointing to its function
4466 descriptor, and a private function descriptors taking two
4467 words. */
4469 static void
4472 {
4473 /* Allocate space for a GOT entry pointing to the symbol. */
4480 else
4484 /* Allocate space for a GOT entry pointing to the function
4485 descriptor. */
4492 else
4496 /* Decide whether we need a PLT entry, a function descriptor in the
4497 GOT, and a lazy PLT entry for this symbol. */
4511 /* Allocate space for a function descriptor. */
4520 else
4526 }
4528 /* Compute the total GOT size required by each TLS symbol in each
4529 range. Symbols may require up to 5 words in the GOT: an entry
4530 holding the TLS offset for the symbol, and an entry with a full TLS
4531 descriptor taking 4 words. */
4533 static void
4536 bfd_boolean subtract)
4537 {
4540 /* Allocate space for a GOT entry with the TLS offset of the
4541 symbol. */
4548 else
4552 /* If there's any TLSOFF relocation, mark the output file as not
4553 suitable for dlopening. This mark will remain even if we relax
4554 all such relocations, but this is not a problem, since we'll only
4555 do so for executables, and we definitely don't want anyone
4556 dlopening executables. */
4560 /* Allocate space for a TLS descriptor. */
4569 else
4572 }
4574 /* Compute the number of dynamic relocations and fixups that a symbol
4575 requires, and add (or subtract) from the grand and per-symbol
4576 totals. */
4578 static void
4581 bfd_boolean subtract)
4582 {
4586 {
4590 /* In the executable, TLS relocations to symbols that bind
4591 locally (including those that resolve to global TLS offsets)
4592 are resolved immediately, without any need for fixups or
4593 dynamic relocations. In shared libraries, however, we must
4594 emit dynamic relocations even for local symbols, because we
4595 don't know the module id the library is going to get at
4596 run-time, nor its TLS base offset. */
4601 }
4602 else
4603 {
4605 {
4611 }
4612 else
4613 {
4616 }
4620 {
4624 }
4625 else
4627 }
4630 {
4634 }
4641 }
4643 /* Look for opportunities to relax TLS relocations. We can assume
4644 we're linking the main executable or a static-tls library, since
4645 otherwise we wouldn't have got here. When relaxing, we have to
4646 first undo any previous accounting of TLS uses of fixups, dynamic
4647 relocations, GOT and PLT entries. */
4649 static void
4652 bfd_boolean relaxing)
4653 {
4660 {
4662 {
4666 }
4668 /* When linking an executable, we can always decay GOTTLSDESC to
4669 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4670 When linking a static-tls shared library, using TLSMOFF is
4671 not an option, but we can still use GOTTLSOFF. When decaying
4672 to GOTTLSOFF, we must keep the GOT entry in range. We know
4673 it has to fit because we'll be trading the 4 words of hte TLS
4674 descriptor for a single word in the same range. */
4678 {
4682 }
4685 }
4687 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4688 main executable. We have to check whether the symbol's TLSOFF is
4689 in range for a setlos. For symbols with a hash entry, we can
4690 determine exactly what to do; for others locals, we don't have
4691 addresses handy, so we use the size of the TLS section as an
4692 approximation. If we get it wrong, we'll retain a GOT entry
4693 holding the TLS offset (without dynamic relocations or fixups),
4694 but we'll still optimize away the loads from it. Since TLS sizes
4695 are generally very small, it's probably not worth attempting to
4696 do better than this. */
4702 /* The above may hold for an undefweak TLS symbol, so make
4703 sure we don't have this case before accessing def.value
4704 and def.section. */
4716 {
4718 {
4722 }
4726 }
4728 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4729 have a #gottlsoff12 relocation for this entry, or if we can fit
4730 one more in the 12-bit (and 16-bit) ranges. */
4733 || (relaxing
4738 {
4740 {
4744 }
4748 }
4751 {
4754 }
4757 }
4759 /* Compute the total GOT and PLT size required by each symbol in each range. *
4760 Symbols may require up to 4 words in the GOT: an entry pointing to
4761 the symbol, an entry pointing to its function descriptor, and a
4762 private function descriptors taking two words. */
4764 static int
4766 {
4774 else
4775 {
4778 }
4781 }
4783 /* Determine the positive and negative ranges to be used by each
4784 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4785 double-word boundary, are the minimum (negative) and maximum
4786 (positive) GOT offsets already used by previous ranges, except for
4787 an ODD entry that may have been left behind. GOT and FD indicate
4788 the size of GOT entries and function descriptors that must be
4789 placed within the range from -WRAP to WRAP. If there's room left,
4790 up to FDPLT bytes should be reserved for additional function
4791 descriptors. */
4795 bfd_signed_vma fdcur,
4796 bfd_signed_vma odd,
4797 bfd_signed_vma cur,
4798 bfd_vma got,
4799 bfd_vma fd,
4800 bfd_vma fdplt,
4801 bfd_vma tlsd,
4802 bfd_vma tlsdplt,
4803 bfd_vma wrap)
4804 {
4808 /* Start at the given initial points. */
4812 /* If we had an incoming odd word and we have any got entries that
4813 are going to use it, consume it, otherwise leave gad->odd at
4814 zero. We might force gad->odd to zero and return the incoming
4815 odd such that it is used by the next range, but then GOT entries
4816 might appear to be out of order and we wouldn't be able to
4817 shorten the GOT by one word if it turns out to end with an
4818 unpaired GOT entry. */
4820 {
4824 }
4825 else
4828 /* If we're left with an unpaired GOT entry, compute its location
4829 such that we can return it. Otherwise, if got doesn't require an
4830 odd number of words here, either odd was already zero in the
4831 block above, or it was set to zero because got was non-zero, or
4832 got was already zero. In the latter case, we want the value of
4833 odd to carry over to the return statement, so we don't want to
4834 reset odd unless the condition below is true. */
4836 {
4839 }
4841 /* Compute the tentative boundaries of this range. */
4846 /* If function descriptors took too much space, wrap some of them
4847 around. */
4849 {
4852 }
4854 /* If GOT entries took too much space, wrap some of them around.
4855 This may well cause gad->min to become lower than wrapmin. This
4856 will cause a relocation overflow later on, so we don't have to
4857 report it here . */
4859 {
4862 }
4864 /* Add TLS descriptors. */
4869 /* If TLS descriptors took too much space, wrap an integral number
4870 of them around. */
4872 {
4880 }
4882 /* If there is space left and we have function descriptors
4883 referenced in PLT entries that could take advantage of shorter
4884 offsets, place them now. */
4886 {
4887 bfd_vma fds;
4891 else
4898 }
4900 /* If there is more space left, try to place some more function
4901 descriptors for PLT entries. */
4903 {
4904 bfd_vma fds;
4908 else
4915 }
4917 /* If there is space left and we have TLS descriptors referenced in
4918 PLT entries that could take advantage of shorter offsets, place
4919 them now. */
4921 {
4922 bfd_vma tlsds;
4926 else
4932 }
4934 /* If there is more space left, try to place some more TLS
4935 descriptors for PLT entries. Although we could try to fit an
4936 additional TLS descriptor with half of it just before before the
4937 wrap point and another right past the wrap point, this might
4938 cause us to run out of space for the next region, so don't do
4939 it. */
4941 {
4942 bfd_vma tlsds;
4946 else
4952 }
4954 /* If odd was initially computed as an offset past the wrap point,
4955 wrap it around. */
4959 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4960 before returning, so do it here too. This guarantees that,
4961 should cur and fdcur meet at the wrap point, they'll both be
4962 equal to min. */
4966 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4972 }
4974 /* Compute the location of the next GOT entry, given the allocation
4975 data for a range. */
4979 {
4980 bfd_signed_vma ret;
4983 {
4984 /* If there was an odd word left behind, use it. */
4987 }
4988 else
4989 {
4990 /* Otherwise, use the word pointed to by cur, reserve the next
4991 as an odd word, and skip to the next pair of words, possibly
4992 wrapping around. */
4998 }
5001 }
5003 /* Compute the location of the next function descriptor entry in the
5004 GOT, given the allocation data for a range. */
5008 {
5009 /* If we're at the bottom, wrap around, and only then allocate the
5010 next pair of words. */
5014 }
5016 /* Compute the location of the next TLS descriptor entry in the GOT,
5017 given the allocation data for a range. */
5020 {
5021 bfd_signed_vma ret;
5027 /* If we're at the top of the region, wrap around to the bottom. */
5032 }
5034 /* Assign GOT offsets for every GOT entry and function descriptor.
5035 Doing everything in a single pass is tricky. */
5037 static int
5039 {
5060 {
5063 }
5067 {
5070 }
5072 {
5075 }
5089 {
5092 }
5096 {
5099 }
5101 {
5104 }
5109 }
5111 /* Assign GOT offsets to private function descriptors used by PLT
5112 entries (or referenced by 32-bit offsets), as well as PLT entries
5113 and lazy PLT entries. */
5115 static int
5117 {
5125 {
5128 /* We use the section's raw size to mark the location of the
5129 next PLT entry. */
5132 /* Figure out the length of this PLT entry based on the
5133 addressing mode we need to reach the function descriptor. */
5141 else
5145 }
5148 {
5151 /* If this entry is the one that gets the resolver stub, account
5152 for the additional instruction. */
5156 }
5159 {
5162 entry->tlsplt_entry
5168 {
5170 /* FIXME: here we use the size of the TLS section
5171 as an upper bound for the value of the TLS
5172 symbol, because we may not know the exact value
5173 yet. If we get it wrong, we'll just waste a
5174 word in the PLT, and we should never get even
5175 close to 32 KiB of TLS anyway. */
5180 else
5182 }
5184 {
5191 else
5193 }
5194 else
5195 {
5204 else
5206 }
5209 }
5212 }
5214 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5215 _frvfdpic_assign_plt_entries. */
5217 static int
5219 {
5232 }
5234 /* Follow indirect and warning hash entries so that each got entry
5235 points to the final symbol definition. P must point to a pointer
5236 to the hash table we're traversing. Since this traversal may
5237 modify the hash table, we set this pointer to NULL to indicate
5238 we've made a potentially-destructive change to the hash table, so
5239 the traversal must be restarted. */
5240 static int
5242 {
5247 {
5259 NO_INSERT);
5262 {
5263 /* Merge the two entries. */
5267 }
5271 /* If we can't find this entry with the new bfd hash, re-insert
5272 it, and get the traversal restarted. */
5274 {
5279 /* Abort the traversal, since the whole table may have
5280 moved, and leave it up to the parent to restart the
5281 process. */
5284 }
5285 }
5288 }
5290 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5291 section and the rofixup section. Assign locations for GOT and PLT
5292 entries. */
5294 static bfd_boolean
5297 {
5298 bfd_signed_vma odd;
5307 /* Compute the total size taken by entries in the 12-bit and 16-bit
5308 ranges, to tell how many PLT function descriptors we can bring
5309 into the 12-bit range without causing the 16-bit range to
5310 overflow. */
5316 else
5319 {
5322 }
5323 else
5328 /* Determine the ranges of GOT offsets that we can use for each
5329 range of addressing modes. */
5332 odd,
5336 limit,
5338 tlslimit,
5342 odd,
5354 odd,
5367 /* Now assign (most) GOT offsets. */
5369 gpinfop);
5373 /* If an odd word is the last word of the GOT, we don't need this
5374 word to be part of the GOT. */
5380 {
5383 }
5384 /* This will be non-NULL during relaxation. The assumption is that
5385 the size of one of these sections will never grow, only shrink,
5386 so we can use the larger buffer we allocated before. */
5388 {
5394 }
5397 /* Subtract the number of lzplt entries, since those will generate
5398 relocations in the pltrel section. */
5402 else
5407 {
5413 }
5419 {
5425 }
5428 {
5435 {
5441 }
5442 }
5444 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5445 such that there's room for the additional instruction needed to
5446 call the resolver. Since _frvfdpic_assign_got_entries didn't
5447 account for them, our block size is 4 bytes smaller than the real
5448 block size. */
5450 {
5454 }
5456 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5457 actually assign lazy PLT entries addresses. */
5460 /* Save information that we're going to need to generate GOT and PLT
5461 entries. */
5472 /* Allocate a ret statement at plt_initial_offset, to be used by
5473 locally-resolved TLS descriptors. */
5478 gpinfop);
5480 /* Allocate the PLT section contents only after
5481 _frvfdpic_assign_plt_entries has a chance to add the size of the
5482 non-lazy PLT entries. */
5484 {
5488 {
5494 }
5495 }
5498 }
5500 /* Set the sizes of the dynamic sections. */
5502 static bfd_boolean
5505 {
5514 {
5515 /* Set the contents of the .interp section to the interpreter. */
5517 {
5522 }
5523 }
5529 {
5536 }
5541 /* Allocate space to save the summary information, we're going to
5542 use it if we're doing relaxations. */
5549 {
5566 }
5569 }
5571 static bfd_boolean
5574 {
5576 {
5579 /* Force a PT_GNU_STACK segment to be created. */
5583 /* Define __stacksize if it's not defined yet. */
5589 {
5602 /* This one must NOT be hidden. */
5603 }
5604 }
5607 }
5609 /* Check whether any of the relocations was optimized away, and
5610 subtract it from the relocation or fixup count. */
5611 static bfd_boolean
5616 {
5630 /* Now examine each relocation. */
5632 {
5650 else
5651 {
5656 }
5662 else
5679 }
5682 }
5684 static bfd_boolean
5688 {
5693 /* Account for relaxation of .eh_frame section. */
5696 {
5700 }
5703 {
5710 /* Clear GOT and PLT assignments. */
5712 _frvfdpic_reset_got_plt_entries,
5713 NULL);
5717 }
5720 }
5722 /* Look for opportunities to relax TLS relocations. We can assume
5723 we're linking the main executable or a static-tls library, since
5724 otherwise we wouldn't have got here. */
5726 static int
5728 {
5735 }
5737 static bfd_boolean
5740 {
5747 /* If we return early, we didn't change anything. */
5750 /* We'll do our thing when requested to relax the GOT section. */
5754 /* We can only relax when linking the main executable or a library
5755 that can't be dlopened. */
5759 /* If there isn't a TLS section for this binary, we can't do
5760 anything about its TLS relocations (it probably doesn't have
5761 any. */
5768 /* Now look for opportunities to relax, adjusting the GOT usage
5769 as needed. */
5771 _frvfdpic_relax_got_plt_entries,
5774 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5777 {
5778 /* Clear GOT and PLT assignments. */
5780 _frvfdpic_reset_got_plt_entries,
5781 NULL);
5783 /* The owner of the TLS section is the output bfd. There should
5784 be a better way to get to it. */
5789 /* Repeat until we don't make any further changes. We could fail to
5790 introduce changes in a round if, for example, the 12-bit range is
5791 full, but we later release some space by getting rid of TLS
5792 descriptors in it. We have to repeat the whole process because
5793 we might have changed the size of a section processed before this
5794 one. */
5796 }
5799 }
5801 static bfd_boolean
5804 {
5809 /* objcopy and strip preserve what's already there using
5810 elf32_frvfdpic_copy_private_bfd_data (). */
5819 {
5822 /* Obtain the pointer to the __stacksize symbol. */
5826 {
5831 }
5833 /* Set the header p_memsz from the symbol value. We
5834 intentionally ignore the symbol section. */
5837 else
5841 }
5844 }
5846 /* Fill in code and data in dynamic sections. */
5848 static bfd_boolean
5851 {
5852 /* Nothing to be done for non-FDPIC. */
5854 }
5856 static bfd_boolean
5859 {
5866 {
5868 }
5870 {
5876 {
5888 {
5889 error:
5893 }
5900 {
5901 bfd_vma value =
5910 }
5911 }
5912 }
5914 {
5918 }
5922 {
5934 {
5935 Elf_Internal_Dyn dyn;
5940 {
5962 }
5963 }
5964 }
5967 }
5969 /* Adjust a symbol defined by a dynamic object and referenced by a
5970 regular object. */
5972 static bfd_boolean
5973 elf32_frvfdpic_adjust_dynamic_symbol
5976 {
5981 /* Make sure we know what is going on here. */
5988 /* If this is a weak symbol, and there is a real definition, the
5989 processor independent code will have arranged for us to see the
5990 real definition first, and we can just use the same value. */
5992 {
5997 }
6000 }
6002 /* Perform any actions needed for dynamic symbols. */
6004 static bfd_boolean
6005 elf32_frvfdpic_finish_dynamic_symbol
6010 {
6012 }
6014 /* Decide whether to attempt to turn absptr or lsda encodings in
6015 shared libraries into pcrel within the given input section. */
6017 static bfd_boolean
6018 frvfdpic_elf_use_relative_eh_frame
6022 {
6023 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
6025 }
6027 /* Adjust the contents of an eh_frame_hdr section before they're output. */
6029 static bfd_byte
6035 {
6047 == (_frvfdpic_osec_to_segment
6056 }
6058 /* Look through the relocs for a section during the first phase.
6060 Besides handling virtual table relocs for gc, we have to deal with
6061 all sorts of PIC-related relocations. We describe below the
6062 general plan on how to handle such relocations, even though we only
6063 collect information at this point, storing them in hash tables for
6064 perusal of later passes.
6066 32 relocations are propagated to the linker output when creating
6067 position-independent output. LO16 and HI16 relocations are not
6068 supposed to be encountered in this case.
6070 LABEL16 should always be resolvable by the linker, since it's only
6071 used by branches.
6073 LABEL24, on the other hand, is used by calls. If it turns out that
6074 the target of a call is a dynamic symbol, a PLT entry must be
6075 created for it, which triggers the creation of a private function
6076 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
6078 GPREL relocations require the referenced symbol to be in the same
6079 segment as _gp, but this can only be checked later.
6081 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
6082 exist. LABEL24 might as well, since it may require a PLT entry,
6083 that will require a got.
6085 Non-FUNCDESC GOT relocations require a GOT entry to be created
6086 regardless of whether the symbol is dynamic. However, since a
6087 global symbol that turns out to not be exported may have the same
6088 address of a non-dynamic symbol, we don't assign GOT entries at
6089 this point, such that we can share them in this case. A relocation
6090 for the GOT entry always has to be created, be it to offset a
6091 private symbol by the section load address, be it to get the symbol
6092 resolved dynamically.
6094 FUNCDESC GOT relocations require a GOT entry to be created, and
6095 handled as if a FUNCDESC relocation was applied to the GOT entry in
6096 an object file.
6098 FUNCDESC relocations referencing a symbol that turns out to NOT be
6099 dynamic cause a private function descriptor to be created. The
6100 FUNCDESC relocation then decays to a 32 relocation that points at
6101 the private descriptor. If the symbol is dynamic, the FUNCDESC
6102 relocation is propagated to the linker output, such that the
6103 dynamic linker creates the canonical descriptor, pointing to the
6104 dynamically-resolved definition of the function.
6106 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
6107 symbols that are assigned to the same segment as the GOT, but we
6108 can only check this later, after we know the complete set of
6109 symbols defined and/or exported.
6111 FUNCDESC GOTOFF relocations require a function descriptor to be
6112 created and, unless lazy binding is disabled or the symbol is not
6113 dynamic, a lazy PLT entry. Since we can't tell at this point
6114 whether a symbol is going to be dynamic, we have to decide later
6115 whether to create a lazy PLT entry or bind the descriptor directly
6116 to the private function.
6118 FUNCDESC_VALUE relocations are not supposed to be present in object
6119 files, but they may very well be simply propagated to the linker
6120 output, since they have no side effect.
6123 A function descriptor always requires a FUNCDESC_VALUE relocation.
6124 Whether it's in .plt.rel or not depends on whether lazy binding is
6125 enabled and on whether the referenced symbol is dynamic.
6127 The existence of a lazy PLT requires the resolverStub lazy PLT
6128 entry to be present.
6131 As for assignment of GOT, PLT and lazy PLT entries, and private
6132 descriptors, we might do them all sequentially, but we can do
6133 better than that. For example, we can place GOT entries and
6134 private function descriptors referenced using 12-bit operands
6135 closer to the PIC register value, such that these relocations don't
6136 overflow. Those that are only referenced with LO16 relocations
6137 could come next, but we may as well place PLT-required function
6138 descriptors in the 12-bit range to make them shorter. Symbols
6139 referenced with LO16/HI16 may come next, but we may place
6140 additional function descriptors in the 16-bit range if we can
6141 reliably tell that we've already placed entries that are ever
6142 referenced with only LO16. PLT entries are therefore generated as
6143 small as possible, while not introducing relocation overflows in
6144 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6145 generated before or after PLT entries, but not intermingled with
6146 them, such that we can have more lazy PLT entries in range for a
6147 branch to the resolverStub. The resolverStub should be emitted at
6148 the most distant location from the first lazy PLT entry such that
6149 it's still in range for a branch, or closer, if there isn't a need
6150 for so many lazy PLT entries. Additional lazy PLT entries may be
6151 emitted after the resolverStub, as long as branches are still in
6152 range. If the branch goes out of range, longer lazy PLT entries
6153 are emitted.
6155 We could further optimize PLT and lazy PLT entries by giving them
6156 priority in assignment to closer-to-gr17 locations depending on the
6157 number of occurrences of references to them (assuming a function
6158 that's called more often is more important for performance, so its
6159 PLT entry should be faster), or taking hints from the compiler.
6160 Given infinite time and money... :-) */
6162 static bfd_boolean
6168 {
6185 {
6192 else
6193 {
6198 }
6201 {
6231 /* Fall through. */
6239 {
6243 }
6245 {
6248 }
6250 {
6253 {
6260 }
6261 picrel
6265 }
6266 else
6277 }
6280 {
6290 /* Fall through. */
6378 /* This relocation describes the C++ object vtable hierarchy.
6379 Reconstruct it for later use during GC. */
6385 /* This relocation describes which C++ vtable entries are actually
6386 used. Record for later use during GC. */
6408 bad_reloc:
6413 }
6414 }
6417 }
6419 \f
6420 /* Return the machine subcode from the ELF e_flags header. */
6422 static int
6425 {
6427 {
6437 }
6440 }
6442 /* Set the right machine number for a FRV ELF file. */
6444 static bfd_boolean
6447 {
6451 }
6452 \f
6453 /* Function to set the ELF flag bits. */
6455 static bfd_boolean
6458 flagword flags;
6459 {
6463 }
6465 /* Copy backend specific data from one object module to another. */
6467 static bfd_boolean
6471 {
6482 /* Copy object attributes. */
6486 }
6488 /* Return true if the architecture described by elf header flag
6489 EXTENSION is an extension of the architecture described by BASE. */
6491 static bfd_boolean
6493 {
6497 /* CPU_GENERIC code can be merged with code for a specific
6498 architecture, in which case the result is marked as being
6499 for the specific architecture. Everything is therefore
6500 an extension of CPU_GENERIC. */
6513 }
6515 static bfd_boolean
6517 {
6531 /* Copy the stack size. */
6534 {
6539 {
6542 /* Rewrite the phdrs, since we're only called after they
6543 were first written. */
6551 }
6554 }
6557 }
6559 /* Merge backend specific data from an object file to the output
6560 object file when linking. */
6562 static bfd_boolean
6566 {
6580 #ifdef DEBUG
6584 #endif
6587 {
6590 }
6593 ;
6596 {
6597 /* Warn if different # of gprs are used. Note, 0 means nothing is
6598 said about the size of gprs. */
6602 ;
6605 ;
6610 else
6611 {
6613 {
6617 }
6620 {
6624 }
6625 }
6627 /* Warn if different # of fprs are used. Note, 0 means nothing is
6628 said about the size of fprs. */
6632 ;
6635 ;
6640 else
6641 {
6643 {
6648 }
6651 {
6656 }
6657 }
6659 /* Warn if different dword support was used. Note, 0 means nothing is
6660 said about the dword support. */
6664 ;
6667 ;
6672 else
6673 {
6675 {
6679 }
6682 {
6686 }
6687 }
6689 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6690 feature is used. */
6692 | EF_FRV_MEDIA
6693 | EF_FRV_MULADD
6696 /* If any module was compiled without -G0, clear the G0 bit. */
6700 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6704 /* We don't have to do anything if the pic flags are the same, or the new
6705 module(s) were compiled with -mlibrary-pic. */
6709 ;
6711 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6712 flags if any from the new module. */
6716 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6720 /* One module was compiled for pic and the other was not, see if we have
6721 had any relocations that are not pic-safe. */
6722 else
6723 {
6726 else
6727 {
6729 #ifndef FRV_NO_PIC_ERROR
6735 #endif
6736 }
6737 }
6739 /* Warn if different cpu is used (allow a specific cpu to override
6740 the generic cpu). */
6744 ;
6749 else
6750 {
6752 {
6763 }
6766 {
6777 }
6778 }
6780 /* Print out any mismatches from above. */
6782 {
6787 }
6789 /* Warn about any other mismatches */
6793 {
6799 }
6800 }
6802 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6806 /* Update the old flags now with changes made above. */
6814 {
6820 else
6824 }
6830 }
6832 \f
6833 bfd_boolean
6836 PTR ptr;
6837 {
6839 flagword flags;
6843 /* Print normal ELF private data. */
6850 {
6860 }
6863 {
6867 }
6870 {
6875 }
6878 {
6882 }
6913 }
6915 \f
6916 /* Support for core dump NOTE sections. */
6918 static bfd_boolean
6920 {
6925 {
6929 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6930 hardcoded offsets and sizes listed below (and contained within
6931 this lexical block) refer to fields in the target's elf_prstatus
6932 struct. */
6934 /* `pr_cursig' is at offset 12. */
6937 /* `pr_pid' is at offset 24. */
6940 /* `pr_reg' is at offset 72. */
6943 /* Most grok_prstatus implementations set `raw_size' to the size
6944 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6945 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6946 and `pr_interp_fdpic_loadmap', both of which (by design)
6947 immediately follow `pr_reg'. This will allow these fields to
6948 be viewed by GDB as registers.
6950 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6951 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6955 }
6957 /* Make a ".reg/999" section. */
6960 }
6962 static bfd_boolean
6964 {
6966 {
6970 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6973 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6977 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6980 }
6982 /* Note that for some reason, a spurious space is tacked
6983 onto the end of the args in some (at least one anyway)
6984 implementations, so strip it off if it exists. */
6986 {
6992 }
6995 }
6996 #define ELF_ARCH bfd_arch_frv
6997 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6998 #define ELF_MAXPAGESIZE 0x1000
7000 #define TARGET_BIG_SYM bfd_elf32_frv_vec
7003 #define elf_info_to_howto frv_info_to_howto_rela
7004 #define elf_backend_relocate_section elf32_frv_relocate_section
7005 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
7006 #define elf_backend_check_relocs elf32_frv_check_relocs
7007 #define elf_backend_object_p elf32_frv_object_p
7008 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
7010 #define elf_backend_can_gc_sections 1
7011 #define elf_backend_rela_normal 1
7013 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
7014 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
7015 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
7016 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
7017 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
7018 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
7020 #define elf_backend_want_got_sym 1
7021 #define elf_backend_got_header_size 0
7022 #define elf_backend_want_got_plt 0
7023 #define elf_backend_plt_readonly 1
7024 #define elf_backend_want_plt_sym 0
7025 #define elf_backend_plt_header_size 0
7027 #define elf_backend_finish_dynamic_sections \
7028 elf32_frv_finish_dynamic_sections
7030 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
7031 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
7035 #undef ELF_MAXPAGESIZE
7036 #define ELF_MAXPAGESIZE 0x4000
7038 #undef TARGET_BIG_SYM
7039 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
7040 #undef TARGET_BIG_NAME
7042 #undef elf32_bed
7043 #define elf32_bed elf32_frvfdpic_bed
7045 #undef elf_info_to_howto_rel
7046 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
7048 #undef bfd_elf32_bfd_link_hash_table_create
7049 #define bfd_elf32_bfd_link_hash_table_create \
7050 frvfdpic_elf_link_hash_table_create
7051 #undef elf_backend_always_size_sections
7052 #define elf_backend_always_size_sections \
7053 elf32_frvfdpic_always_size_sections
7054 #undef elf_backend_modify_program_headers
7055 #define elf_backend_modify_program_headers \
7056 elf32_frvfdpic_modify_program_headers
7057 #undef bfd_elf32_bfd_copy_private_bfd_data
7058 #define bfd_elf32_bfd_copy_private_bfd_data \
7059 elf32_frvfdpic_copy_private_bfd_data
7061 #undef elf_backend_create_dynamic_sections
7062 #define elf_backend_create_dynamic_sections \
7063 elf32_frvfdpic_create_dynamic_sections
7064 #undef elf_backend_adjust_dynamic_symbol
7065 #define elf_backend_adjust_dynamic_symbol \
7066 elf32_frvfdpic_adjust_dynamic_symbol
7067 #undef elf_backend_size_dynamic_sections
7068 #define elf_backend_size_dynamic_sections \
7069 elf32_frvfdpic_size_dynamic_sections
7070 #undef bfd_elf32_bfd_relax_section
7071 #define bfd_elf32_bfd_relax_section \
7072 elf32_frvfdpic_relax_section
7073 #undef elf_backend_finish_dynamic_symbol
7074 #define elf_backend_finish_dynamic_symbol \
7075 elf32_frvfdpic_finish_dynamic_symbol
7076 #undef elf_backend_finish_dynamic_sections
7077 #define elf_backend_finish_dynamic_sections \
7078 elf32_frvfdpic_finish_dynamic_sections
7080 #undef elf_backend_discard_info
7081 #define elf_backend_discard_info \
7082 frvfdpic_elf_discard_info
7083 #undef elf_backend_can_make_relative_eh_frame
7084 #define elf_backend_can_make_relative_eh_frame \
7085 frvfdpic_elf_use_relative_eh_frame
7086 #undef elf_backend_can_make_lsda_relative_eh_frame
7087 #define elf_backend_can_make_lsda_relative_eh_frame \
7088 frvfdpic_elf_use_relative_eh_frame
7089 #undef elf_backend_encode_eh_address
7090 #define elf_backend_encode_eh_address \
7091 frvfdpic_elf_encode_eh_address
7093 #undef elf_backend_may_use_rel_p
7094 #define elf_backend_may_use_rel_p 1
7095 #undef elf_backend_may_use_rela_p
7096 #define elf_backend_may_use_rela_p 1
7097 /* We use REL for dynamic relocations only. */
7098 #undef elf_backend_default_use_rela_p
7099 #define elf_backend_default_use_rela_p 1
7101 #undef elf_backend_omit_section_dynsym
7102 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym