| blob | 6d0d7e483383906e6aeca16e58e3b3da2a5e4c27 |
1 /* FRV-specific support for 32-bit ELF.
2 Copyright 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 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, MA 02110-1301, USA. */
29 /* Forward declarations. */
30 static bfd_reloc_status_type elf32_frv_relocate_lo16
32 static bfd_reloc_status_type elf32_frv_relocate_hi16
34 static bfd_reloc_status_type elf32_frv_relocate_label24
36 static bfd_reloc_status_type elf32_frv_relocate_gprel12
39 static bfd_reloc_status_type elf32_frv_relocate_gprelu12
42 static bfd_reloc_status_type elf32_frv_relocate_gprello
45 static bfd_reloc_status_type elf32_frv_relocate_gprelhi
50 static void frv_info_to_howto_rela
52 static bfd_boolean elf32_frv_relocate_section
55 static bfd_boolean elf32_frv_add_symbol_hook
58 static bfd_reloc_status_type frv_final_link_relocate
61 static bfd_boolean elf32_frv_check_relocs
64 static int elf32_frv_machine
66 static bfd_boolean elf32_frv_object_p
68 static bfd_boolean frv_elf_set_private_flags
70 static bfd_boolean frv_elf_copy_private_bfd_data
72 static bfd_boolean frv_elf_merge_private_bfd_data
74 static bfd_boolean frv_elf_print_private_bfd_data
82 {
83 /* This reloc does nothing. */
98 /* A 32 bit absolute relocation. */
113 /* A 16 bit pc-relative relocation. */
128 /* A 24-bit pc-relative relocation. */
241 /* A 12-bit signed operand with the GOT offset for the address of
242 the symbol. */
257 /* The upper 16 bits of the GOT offset for the address of the
258 symbol. */
273 /* The lower 16 bits of the GOT offset for the address of the
274 symbol. */
289 /* The 32-bit address of the canonical descriptor of a function. */
304 /* A 12-bit signed operand with the GOT offset for the address of
305 canonical descriptor of a function. */
320 /* The upper 16 bits of the GOT offset for the address of the
321 canonical descriptor of a function. */
336 /* The lower 16 bits of the GOT offset for the address of the
337 canonical descriptor of a function. */
352 /* The 64-bit descriptor of a function. */
367 /* A 12-bit signed operand with the GOT offset for the address of
368 canonical descriptor of a function. */
383 /* The upper 16 bits of the GOT offset for the address of the
384 canonical descriptor of a function. */
399 /* The lower 16 bits of the GOT offset for the address of the
400 canonical descriptor of a function. */
415 /* A 12-bit signed operand with the GOT offset for the address of
416 the symbol. */
431 /* The upper 16 bits of the GOT offset for the address of the
432 symbol. */
447 /* The lower 16 bits of the GOT offset for the address of the
448 symbol. */
463 /* A 24-bit pc-relative relocation referencing the TLS PLT entry for
464 a thread-local symbol. If the symbol number is 0, it refers to
465 the module. */
480 /* A 64-bit TLS descriptor for a symbol. This relocation is only
481 valid as a REL, dynamic relocation. */
496 /* A 12-bit signed operand with the GOT offset for the TLS
497 descriptor of the symbol. */
512 /* The upper 16 bits of the GOT offset for the TLS descriptor of the
513 symbol. */
528 /* The lower 16 bits of the GOT offset for the TLS descriptor of the
529 symbol. */
544 /* A 12-bit signed operand with the offset from the module base
545 address to the thread-local symbol address. */
560 /* The upper 16 bits of the offset from the module base address to
561 the thread-local symbol address. */
576 /* The lower 16 bits of the offset from the module base address to
577 the thread-local symbol address. */
592 /* A 12-bit signed operand with the GOT offset for the TLSOFF entry
593 for a symbol. */
608 /* The upper 16 bits of the GOT offset for the TLSOFF entry for a
609 symbol. */
624 /* The lower 16 bits of the GOT offset for the TLSOFF entry for a
625 symbol. */
640 /* The 32-bit offset from the thread pointer (not the module base
641 address) to a thread-local symbol. */
656 /* An annotation for linker relaxation, that denotes the
657 symbol+addend whose TLS descriptor is referenced by the sum of
658 the two input registers of an ldd instruction. */
673 /* An annotation for linker relaxation, that denotes the
674 symbol+addend whose TLS resolver entry point is given by the sum
675 of the two register operands of an calll instruction. */
690 /* An annotation for linker relaxation, that denotes the
691 symbol+addend whose TLS offset GOT entry is given by the sum of
692 the two input registers of an ld instruction. */
707 /* A 32-bit offset from the module base address to
708 the thread-local symbol address. */
722 };
724 /* GNU extension to record C++ vtable hierarchy. */
740 /* GNU extension to record C++ vtable member usage. */
756 /* The following 3 relocations are REL. The only difference to the
757 entries in the table above are that partial_inplace is TRUE. */
804 /* A 64-bit TLS descriptor for a symbol. The first word resolves to
805 an entry point, and the second resolves to a special argument.
806 If the symbol turns out to be in static TLS, the entry point is a
807 return instruction, and the special argument is the TLS offset
808 for the symbol. If it's in dynamic TLS, the entry point is a TLS
809 offset resolver, and the special argument is a pointer to a data
810 structure allocated by the dynamic loader, containing the GOT
811 address for the offset resolver, the module id, the offset within
812 the module, and anything else the TLS offset resolver might need
813 to determine the TLS offset for the symbol in the running
814 thread. */
830 /* The 32-bit offset from the thread pointer (not the module base
831 address) to a thread-local symbol. */
847 \f
849 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_frvfdpic_vec)
851 /* An extension of the elf hash table data structure, containing some
852 additional FRV-specific data. */
853 struct frvfdpic_elf_link_hash_table
854 {
857 /* A pointer to the .got section. */
859 /* A pointer to the .rel.got section. */
861 /* A pointer to the .rofixup section. */
863 /* A pointer to the .plt section. */
865 /* A pointer to the .rel.plt section. */
867 /* GOT base offset. */
868 bfd_vma got0;
869 /* Location of the first non-lazy PLT entry, i.e., the number of
870 bytes taken by lazy PLT entries. If locally-bound TLS
871 descriptors require a ret instruction, it will be placed at this
872 offset. */
873 bfd_vma plt0;
874 /* A hash table holding information about which symbols were
875 referenced with which PIC-related relocations. */
877 /* Summary reloc information collected by
878 _frvfdpic_count_got_plt_entries. */
880 };
882 /* Get the FRV ELF linker hash table from a link_info structure. */
884 #define frvfdpic_hash_table(info) \
885 ((struct frvfdpic_elf_link_hash_table *) ((info)->hash))
887 #define frvfdpic_got_section(info) \
888 (frvfdpic_hash_table (info)->sgot)
889 #define frvfdpic_gotrel_section(info) \
890 (frvfdpic_hash_table (info)->sgotrel)
891 #define frvfdpic_gotfixup_section(info) \
892 (frvfdpic_hash_table (info)->sgotfixup)
893 #define frvfdpic_plt_section(info) \
894 (frvfdpic_hash_table (info)->splt)
895 #define frvfdpic_pltrel_section(info) \
896 (frvfdpic_hash_table (info)->spltrel)
897 #define frvfdpic_relocs_info(info) \
898 (frvfdpic_hash_table (info)->relocs_info)
899 #define frvfdpic_got_initial_offset(info) \
900 (frvfdpic_hash_table (info)->got0)
901 #define frvfdpic_plt_initial_offset(info) \
902 (frvfdpic_hash_table (info)->plt0)
903 #define frvfdpic_dynamic_got_plt_info(info) \
904 (frvfdpic_hash_table (info)->g)
906 /* Currently it's the same, but if some day we have a reason to change
907 it, we'd better be using a different macro.
909 FIXME: if there's any TLS PLT entry that uses local-exec or
910 initial-exec models, we could use the ret at the end of any of them
911 instead of adding one more. */
912 #define frvfdpic_plt_tls_ret_offset(info) \
913 (frvfdpic_plt_initial_offset (info))
915 /* The name of the dynamic interpreter. This is put in the .interp
916 section. */
920 #define DEFAULT_STACK_SIZE 0x20000
922 /* This structure is used to collect the number of entries present in
923 each addressable range of the got. */
924 struct _frvfdpic_dynamic_got_info
925 {
926 /* Several bits of information about the current link. */
928 /* Total GOT size needed for GOT entries within the 12-, 16- or 32-bit
929 ranges. */
931 /* Total GOT size needed for function descriptor entries within the 12-,
932 16- or 32-bit ranges. */
934 /* Total GOT size needed by function descriptor entries referenced
935 in PLT entries, that would be profitable to place in offsets
936 close to the PIC register. */
937 bfd_vma fdplt;
938 /* Total PLT size needed by lazy PLT entries. */
939 bfd_vma lzplt;
940 /* Total GOT size needed for TLS descriptor entries within the 12-,
941 16- or 32-bit ranges. */
943 /* Total GOT size needed by TLS descriptors referenced in PLT
944 entries, that would be profitable to place in offers close to the
945 PIC register. */
946 bfd_vma tlsdplt;
947 /* Total PLT size needed by TLS lazy PLT entries. */
948 bfd_vma tlslzplt;
949 /* Number of relocations carried over from input object files. */
951 /* Number of fixups introduced by relocations in input object files. */
953 /* The number of fixups that reference the ret instruction added to
954 the PLT for locally-resolved TLS descriptors. */
956 };
958 /* This structure is used to assign offsets to got entries, function
959 descriptors, plt entries and lazy plt entries. */
961 struct _frvfdpic_dynamic_got_plt_info
962 {
963 /* Summary information collected with _frvfdpic_count_got_plt_entries. */
966 /* For each addressable range, we record a MAX (positive) and MIN
967 (negative) value. CUR is used to assign got entries, and it's
968 incremented from an initial positive value to MAX, then from MIN
969 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
970 assign function descriptors, and it's decreased from an initial
971 non-positive value to MIN, then from MAX down to CUR (unless CUR
972 wraps around first). All of MIN, MAX, CUR and FDCUR always point
973 to even words. ODD, if non-zero, indicates an odd word to be
974 used for the next got entry, otherwise CUR is used and
975 incremented by a pair of words, wrapping around when it reaches
976 MAX. FDCUR is decremented (and wrapped) before the next function
977 descriptor is chosen. FDPLT indicates the number of remaining
978 slots that can be used for function descriptors used only by PLT
979 entries.
981 TMAX, TMIN and TCUR are used to assign TLS descriptors. TCUR
982 starts as MAX, and grows up to TMAX, then wraps around to TMIN
983 and grows up to MIN. TLSDPLT indicates the number of remaining
984 slots that can be used for TLS descriptors used only by TLS PLT
985 entries. */
986 struct _frvfdpic_dynamic_got_alloc_data
987 {
992 };
994 /* Create an FRV ELF linker hash table. */
998 {
1007 _bfd_elf_link_hash_newfunc,
1009 {
1012 }
1015 }
1017 /* Decide whether a reference to a symbol can be resolved locally or
1018 not. If the symbol is protected, we want the local address, but
1019 its function descriptor must be assigned by the dynamic linker. */
1020 #define FRVFDPIC_SYM_LOCAL(INFO, H) \
1021 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1022 || ! elf_hash_table (INFO)->dynamic_sections_created)
1023 #define FRVFDPIC_FUNCDESC_LOCAL(INFO, H) \
1024 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1026 /* This structure collects information on what kind of GOT, PLT or
1027 function descriptors are required by relocations that reference a
1028 certain symbol. */
1029 struct frvfdpic_relocs_info
1030 {
1031 /* The index of the symbol, as stored in the relocation r_info, if
1032 we have a local symbol; -1 otherwise. */
1034 union
1035 {
1036 /* The input bfd in which the symbol is defined, if it's a local
1037 symbol. */
1039 /* If symndx == -1, the hash table entry corresponding to a global
1040 symbol (even if it turns out to bind locally, in which case it
1041 should ideally be replaced with section's symndx + addend). */
1044 /* The addend of the relocation that references the symbol. */
1045 bfd_vma addend;
1047 /* The fields above are used to identify an entry. The fields below
1048 contain information on how an entry is used and, later on, which
1049 locations it was assigned. */
1050 /* The following 3 fields record whether the symbol+addend above was
1051 ever referenced with a GOT relocation. The 12 suffix indicates a
1052 GOT12 relocation; los is used for GOTLO relocations that are not
1053 matched by a GOTHI relocation; hilo is used for GOTLO/GOTHI
1054 pairs. */
1058 /* Whether a FUNCDESC relocation references symbol+addend. */
1060 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1064 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1068 /* Whether a GETTLSOFF relocation references symbol+addend. */
1070 /* FIXME: we should probably add tlspltdesc, tlspltoff and
1071 tlspltimm, to tell what kind of TLS PLT entry we're generating.
1072 We might instead just pre-compute flags telling whether the
1073 object is suitable for local exec, initial exec or general
1074 dynamic addressing, and use that all over the place. We could
1075 also try to do a better job of merging TLSOFF and TLSDESC entries
1076 in main executables, but perhaps we can get rid of TLSDESC
1077 entirely in them instead. */
1078 /* Whether a GOTTLSDESC relocation references symbol+addend. */
1082 /* Whether a GOTTLSOFF relocation references symbol+addend. */
1086 /* Whether symbol+addend is referenced with GOTOFF12, GOTOFFLO or
1087 GOTOFFHI relocations. The addend doesn't really matter, since we
1088 envision that this will only be used to check whether the symbol
1089 is mapped to the same segment as the got. */
1091 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1093 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1094 relocation. */
1096 /* Whether we need a PLT entry for a symbol. Should be implied by
1097 something like:
1098 (call && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)) */
1100 /* Whether a function descriptor should be created in this link unit
1101 for symbol+addend. Should be implied by something like:
1102 (plt || fdgotoff12 || fdgotofflos || fdgotofflohi
1103 || ((fd || fdgot12 || fdgotlos || fdgothilo)
1104 && (symndx != -1 || FRVFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1106 /* Whether a lazy PLT entry is needed for this symbol+addend.
1107 Should be implied by something like:
1108 (privfd && symndx == -1 && ! FRVFDPIC_SYM_LOCAL (info, d.h)
1109 && ! (info->flags & DF_BIND_NOW)) */
1111 /* Whether we've already emitted GOT relocations and PLT entries as
1112 needed for this symbol. */
1115 /* The number of R_FRV_32, R_FRV_FUNCDESC, R_FRV_FUNCDESC_VALUE and
1116 R_FRV_TLSDESC_VALUE, R_FRV_TLSOFF relocations referencing
1117 symbol+addend. */
1120 /* The number of .rofixups entries and dynamic relocations allocated
1121 for this symbol, minus any that might have already been used. */
1124 /* The offsets of the GOT entries assigned to symbol+addend, to the
1125 function descriptor's address, and to a function descriptor,
1126 respectively. Should be zero if unassigned. The offsets are
1127 counted from the value that will be assigned to the PIC register,
1128 not from the beginning of the .got section. */
1130 /* The offsets of the PLT entries assigned to symbol+addend,
1131 non-lazy and lazy, respectively. If unassigned, should be
1132 (bfd_vma)-1. */
1134 /* The offsets of the GOT entries for TLS offset and TLS descriptor. */
1136 /* The offset of the TLS offset PLT entry. */
1137 bfd_vma tlsplt_entry;
1138 };
1140 /* Compute a hash with the key fields of an frvfdpic_relocs_info entry. */
1141 static hashval_t
1143 {
1149 }
1151 /* Test whether the key fields of two frvfdpic_relocs_info entries are
1152 identical. */
1153 static int
1155 {
1161 }
1163 /* Find or create an entry in a hash table HT that matches the key
1164 fields of the given ENTRY. If it's not found, memory for a new
1165 entry is allocated in ABFD's obstack. */
1171 {
1194 }
1196 /* Obtain the address of the entry in HT associated with H's symbol +
1197 addend, creating a new entry if none existed. ABFD is only used
1198 for memory allocation purposes. */
1203 bfd_vma addend,
1205 {
1213 }
1215 /* Obtain the address of the entry in HT associated with the SYMNDXth
1216 local symbol of the input bfd ABFD, plus the addend, creating a new
1217 entry if none existed. */
1222 bfd_vma addend,
1224 {
1232 }
1234 /* Merge fields set by check_relocs() of two entries that end up being
1235 mapped to the same (presumably global) symbol. */
1240 {
1261 }
1263 /* Every block of 65535 lazy PLT entries shares a single call to the
1264 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1265 32767, counting from 0). All other lazy PLT entries branch to it
1266 in a single instruction. */
1268 #define FRVFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) 8 * 65535 + 4)
1269 #define FRVFDPIC_LZPLT_RESOLV_LOC (8 * 32767)
1271 /* Add a dynamic relocation to the SRELOC section. */
1277 {
1278 Elf_Internal_Rela outrel;
1279 bfd_vma reloc_offset;
1291 /* If the entry's index is zero, this relocation was probably to a
1292 linkonce section that got discarded. We reserved a dynamic
1293 relocation, but it was for another entry than the one we got at
1294 the time of emitting the relocation. Unfortunately there's no
1295 simple way for us to catch this situation, since the relocation
1296 is cleared right before calling relocate_section, at which point
1297 we no longer know what the relocation used to point to. */
1299 {
1302 }
1305 }
1307 /* Add a fixup to the ROFIXUP section. */
1309 static bfd_vma
1312 {
1313 bfd_vma fixup_offset;
1320 {
1323 }
1327 {
1328 /* See discussion about symndx == 0 in _frvfdpic_add_dyn_reloc
1329 above. */
1332 }
1335 }
1337 /* Find the segment number in which OSEC, and output section, is
1338 located. */
1340 static unsigned
1342 {
1346 /* Find the segment that contains the output_section. */
1351 {
1360 }
1363 }
1367 {
1371 }
1373 #define FRVFDPIC_TLS_BIAS (2048 - 16)
1375 /* Return the base VMA address which should be subtracted from real addresses
1376 when resolving TLSMOFF relocation.
1377 This is PT_TLS segment p_vaddr, plus the 2048-16 bias. */
1379 static bfd_vma
1381 {
1382 /* If tls_sec is NULL, we should have signalled an error already. */
1386 }
1388 /* Generate relocations for GOT entries, function descriptors, and
1389 code for PLT and lazy PLT entries. */
1397 bfd_vma addend)
1399 {
1409 {
1410 /* If the symbol is dynamic, consider it for dynamic
1411 relocations, otherwise decay to section + offset. */
1414 else
1415 {
1420 else
1422 }
1423 }
1425 /* Generate relocation for GOT entry pointing to the symbol. */
1427 {
1431 /* If the symbol is dynamic but binds locally, use
1432 section+offset. */
1435 {
1438 else
1443 else
1445 }
1447 /* If we're linking an executable at a fixed address, we can
1448 omit the dynamic relocation as long as the symbol is local to
1449 this module. */
1453 {
1461 ->vma
1465 }
1466 else
1468 _bfd_elf_section_offset
1482 }
1484 /* Generate relocation for GOT entry pointing to a canonical
1485 function descriptor. */
1487 {
1494 {
1495 /* If the symbol is dynamic and there may be dynamic symbol
1496 resolution because we are, or are linked with, a shared
1497 library, emit a FUNCDESC relocation such that the dynamic
1498 linker will allocate the function descriptor. If the
1499 symbol needs a non-local function descriptor but binds
1500 locally (e.g., its visibility is protected, emit a
1501 dynamic relocation decayed to section+offset. */
1506 {
1512 }
1515 {
1520 {
1527 }
1528 }
1529 else
1530 {
1531 /* Otherwise, we know we have a private function descriptor,
1532 so reference it directly. */
1540 }
1542 /* If there is room for dynamic symbol resolution, emit the
1543 dynamic relocation. However, if we're linking an
1544 executable at a fixed location, we won't have emitted a
1545 dynamic symbol entry for the got section, so idx will be
1546 zero, which means we can and should compute the address
1547 of the private descriptor ourselves. */
1551 {
1558 ->output_offset
1561 }
1562 else
1565 _bfd_elf_section_offset
1575 }
1581 }
1583 /* Generate relocation to fill in a private function descriptor in
1584 the GOT. */
1586 {
1589 bfd_vma ofst;
1592 /* If the symbol is dynamic but binds locally, use
1593 section+offset. */
1596 {
1599 else
1604 else
1606 }
1608 /* If we're linking an executable at a fixed address, we can
1609 omit the dynamic relocation as long as the symbol is local to
1610 this module. */
1613 {
1619 {
1625 ->output_offset
1633 ->output_offset
1636 }
1637 }
1638 else
1639 {
1640 ofst =
1642 entry->lazyplt
1645 _bfd_elf_section_offset
1655 }
1657 /* If we've omitted the dynamic relocation, just emit the fixed
1658 addresses of the symbol and of the local GOT base offset. */
1660 {
1665 }
1667 {
1669 {
1676 }
1680 /* A function descriptor used for lazy or local resolving is
1681 initialized such that its high word contains the output
1682 section index in which the PLT entries are located, and
1683 the low word contains the address of the lazy PLT entry
1684 entry point, that must be within the memory region
1685 assigned to that section. */
1689 highword = _frvfdpic_osec_to_segment
1691 }
1692 else
1693 {
1694 /* A function descriptor for a local function gets the index
1695 of the section. For a non-local function, it's
1696 disregarded. */
1701 else
1702 highword = _frvfdpic_osec_to_segment
1704 }
1714 }
1716 /* Generate code for the PLT entry. */
1718 {
1724 /* Figure out what kind of PLT entry we need, depending on the
1725 location of the function descriptor within the GOT. */
1728 {
1729 /* lddi @(gr15, fd_entry), gr14 */
1732 plt_code);
1734 }
1735 else
1736 {
1739 {
1740 /* setlos lo(fd_entry), gr14 */
1742 0x9cfc0000
1744 plt_code);
1746 }
1747 else
1748 {
1749 /* sethi.p hi(fd_entry), gr14
1750 setlo lo(fd_entry), gr14 */
1752 0x1cf80000
1755 plt_code);
1758 0x9cf40000
1760 plt_code);
1762 }
1763 /* ldd @(gr14,gr15),gr14 */
1766 }
1767 /* jmpl @(gr14,gr0) */
1769 }
1771 /* Generate code for the lazy PLT entry. */
1773 {
1776 bfd_vma resolverStub_addr;
1787 {
1788 /* This is a lazy PLT entry that includes a resolver call. */
1789 /* ldd @(gr15,gr0), gr4
1790 jmpl @(gr4,gr0) */
1793 }
1794 else
1795 {
1796 /* bra resolverStub */
1798 0xc01a0000
1801 lzplt_code);
1802 }
1803 }
1805 /* Generate relocation for GOT entry holding the TLS offset. */
1807 {
1813 {
1814 /* If the symbol is dynamic but binds locally, use
1815 section+offset. */
1817 {
1820 else
1826 else
1828 }
1829 }
1831 /* *ABS*+addend is special for TLS relocations, use only the
1832 addend. */
1837 ;
1838 /* If we're linking an executable, we can entirely omit the
1839 dynamic relocation if the symbol is local to this module. */
1843 {
1846 }
1847 else
1848 {
1852 {
1854 {
1859 }
1862 }
1864 _bfd_elf_section_offset
1874 }
1880 }
1883 {
1887 /* If the symbol is dynamic but binds locally, use
1888 section+offset. */
1891 {
1894 else
1899 else
1901 }
1903 /* If we didn't set up a TLS offset entry, but we're linking an
1904 executable and the symbol binds locally, we can use the
1905 module offset in the TLS descriptor in relaxations. */
1915 {
1916 /* *ABS*+addend is special for TLS relocations, use only the
1917 addend for the TLS offset, and take the module id as
1918 0. */
1922 ;
1923 /* For other TLS symbols that bind locally, add the section
1924 TLS offset to the addend. */
1941 ->output_offset
1947 /* We've used one of the reserved fixups, so discount it so
1948 that we can check at the end that we've used them
1949 all. */
1952 /* While at that, make sure the ret instruction makes to the
1953 right location in the PLT. We could do it only when we
1954 got to 0, but since the check at the end will only print
1955 a warning, make sure we have the ret in place in case the
1956 warning is missed. */
1960 }
1961 else
1962 {
1966 {
1968 {
1973 }
1976 }
1979 _bfd_elf_section_offset
1994 }
2000 }
2002 /* Generate code for the get-TLS-offset PLT entry. */
2004 {
2011 {
2015 /* sec may be NULL when referencing an undefweak symbol
2016 while linking a static executable. */
2018 {
2021 }
2022 else
2023 {
2026 else
2032 else
2034 }
2036 /* *ABS*+addend is special for TLS relocations, use only the
2037 addend for the TLS offset, and take the module id as
2038 0. */
2042 ;
2043 /* For other TLS symbols that bind locally, add the section
2044 TLS offset to the addend. */
2050 {
2051 /* setlos lo(ad), gr9 */
2053 0x92fc0000
2054 | (ad
2056 plt_code);
2058 }
2059 else
2060 {
2061 /* sethi.p hi(ad), gr9
2062 setlo lo(ad), gr9 */
2064 0x12f80000
2067 plt_code);
2070 0x92f40000
2071 | (ad
2073 plt_code);
2075 }
2076 /* ret */
2078 }
2080 {
2081 /* Figure out what kind of PLT entry we need, depending on the
2082 location of the TLS descriptor within the GOT. */
2085 {
2086 /* ldi @(gr15, tlsoff_entry), gr9 */
2090 plt_code);
2092 }
2093 else
2094 {
2097 {
2098 /* setlos lo(tlsoff_entry), gr8 */
2100 0x90fc0000
2103 plt_code);
2105 }
2106 else
2107 {
2108 /* sethi.p hi(tlsoff_entry), gr8
2109 setlo lo(tlsoff_entry), gr8 */
2111 0x10f80000
2114 plt_code);
2117 0x90f40000
2120 plt_code);
2122 }
2123 /* ld @(gr15,gr8),gr9 */
2126 }
2127 /* ret */
2129 }
2130 else
2131 {
2134 /* Figure out what kind of PLT entry we need, depending on the
2135 location of the TLS descriptor within the GOT. */
2138 {
2139 /* lddi @(gr15, tlsdesc_entry), gr8 */
2143 plt_code);
2145 }
2146 else
2147 {
2150 {
2151 /* setlos lo(tlsdesc_entry), gr8 */
2153 0x90fc0000
2156 plt_code);
2158 }
2159 else
2160 {
2161 /* sethi.p hi(tlsdesc_entry), gr8
2162 setlo lo(tlsdesc_entry), gr8 */
2164 0x10f80000
2167 plt_code);
2170 0x90f40000
2173 plt_code);
2175 }
2176 /* ldd @(gr15,gr8),gr8 */
2179 }
2180 /* jmpl @(gr8,gr0) */
2182 }
2183 }
2186 }
2188 /* Handle an FRV small data reloc. */
2190 static bfd_reloc_status_type
2198 bfd_vma value;
2199 {
2200 bfd_vma insn;
2201 bfd_vma gp;
2225 }
2227 /* Handle an FRV small data reloc. for the u12 field. */
2229 static bfd_reloc_status_type
2237 bfd_vma value;
2238 {
2239 bfd_vma insn;
2240 bfd_vma gp;
2242 bfd_vma mask;
2260 /* The high 6 bits go into bits 17-12. The low 6 bits go into bits 5-0. */
2267 }
2269 /* Handle an FRV ELF HI16 reloc. */
2271 static bfd_reloc_status_type
2276 bfd_vma value;
2277 {
2278 bfd_vma insn;
2293 }
2294 static bfd_reloc_status_type
2299 bfd_vma value;
2300 {
2301 bfd_vma insn;
2315 }
2317 /* Perform the relocation for the CALL label24 instruction. */
2319 static bfd_reloc_status_type
2325 bfd_vma value;
2326 {
2327 bfd_vma insn;
2328 bfd_vma label6;
2329 bfd_vma label18;
2331 /* The format for the call instruction is:
2333 0 000000 0001111 000000000000000000
2334 label6 opcode label18
2336 The branch calculation is: pc + (4*label24)
2337 where label24 is the concatenation of label6 and label18. */
2339 /* Grab the instruction. */
2360 }
2362 static bfd_reloc_status_type
2370 bfd_vma value;
2371 {
2372 bfd_vma insn;
2373 bfd_vma gp;
2395 }
2397 static bfd_reloc_status_type
2405 bfd_vma value;
2406 {
2407 bfd_vma insn;
2408 bfd_vma gp;
2431 }
2436 bfd_reloc_code_real_type code;
2437 {
2439 {
2450 /* Fall through. */
2588 }
2591 }
2595 {
2600 i++)
2611 }
2613 /* Set the howto pointer for an FRV ELF reloc. */
2615 static void
2620 {
2625 {
2637 }
2638 }
2640 /* Set the howto pointer for an FRV ELF REL reloc. */
2641 static void
2644 {
2649 {
2673 }
2674 }
2675 \f
2676 /* Perform a single relocation. By default we use the standard BFD
2677 routines, but a few relocs, we have to do them ourselves. */
2679 static bfd_reloc_status_type
2681 relocation)
2687 bfd_vma relocation;
2688 {
2692 }
2694 \f
2695 /* Relocate an FRV ELF section.
2697 The RELOCATE_SECTION function is called by the new ELF backend linker
2698 to handle the relocations for a section.
2700 The relocs are always passed as Rela structures; if the section
2701 actually uses Rel structures, the r_addend field will always be
2702 zero.
2704 This function is responsible for adjusting the section contents as
2705 necessary, and (if using Rela relocs and generating a relocatable
2706 output file) adjusting the reloc addend as necessary.
2708 This function does not have to worry about setting the reloc
2709 address or the reloc symbol index.
2711 LOCAL_SYMS is a pointer to the swapped in local symbols.
2713 LOCAL_SECTIONS is an array giving the section in the input file
2714 corresponding to the st_shndx field of each local symbol.
2716 The global hash table entry for the global symbols can be found
2717 via elf_sym_hashes (input_bfd).
2719 When generating relocatable output, this function must handle
2720 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2721 going to be the section symbol corresponding to the output
2722 section, which means that the addend must be adjusted
2723 accordingly. */
2725 static bfd_boolean
2736 {
2756 else
2762 else
2768 else
2773 else
2777 {
2783 bfd_vma relocation;
2784 bfd_reloc_status_type r;
2804 {
2809 name = bfd_elf_string_from_elf_section
2812 }
2813 else
2814 {
2815 bfd_boolean warned;
2816 bfd_boolean unresolved_reloc;
2823 }
2826 {
2827 /* For relocs against symbols from removed linkonce sections,
2828 or sections discarded by a linker script, we just want the
2829 section contents zeroed. Avoid any special processing. */
2834 }
2844 {
2847 }
2850 {
2890 else
2891 /* In order to find the entry we created before, we must
2892 use the original addend, not the one that may have been
2893 modified by _bfd_elf_rela_local_sym(). */
2903 {
2908 }
2913 non_fdpic:
2916 {
2921 }
2923 }
2926 {
2949 }
2951 /* Try to apply TLS relaxations. */
2954 {
2956 #define LOCAL_EXEC_P(info, picrel) \
2957 ((info)->executable \
2958 && (picrel->symndx != -1 || FRVFDPIC_SYM_LOCAL ((info), (picrel)->d.h)))
2959 #define INITIAL_EXEC_P(info, picrel) \
2960 (((info)->executable || (info)->flags & DF_STATIC_TLS) \
2961 && (picrel)->tlsoff_entry)
2963 #define IN_RANGE_FOR_OFST12_P(value) \
2964 ((bfd_vma)((value) + 2048) < (bfd_vma)4096)
2965 #define IN_RANGE_FOR_SETLOS_P(value) \
2966 ((bfd_vma)((value) + 32768) < (bfd_vma)65536)
2967 #define TLSMOFF_IN_RANGE_FOR_SETLOS_P(value, info) \
2968 (IN_RANGE_FOR_SETLOS_P ((value) - tls_biased_base (info)))
2970 #define RELAX_GETTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2971 (LOCAL_EXEC_P ((info), (picrel)) \
2972 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2973 #define RELAX_GETTLSOFF_INITIAL_EXEC_P(info, picrel) \
2974 (INITIAL_EXEC_P ((info), (picrel)) \
2975 && IN_RANGE_FOR_OFST12_P ((picrel)->tlsoff_entry))
2977 #define RELAX_TLSDESC_LOCAL_EXEC_P(info, picrel, value) \
2978 (LOCAL_EXEC_P ((info), (picrel)))
2979 #define RELAX_TLSDESC_INITIAL_EXEC_P(info, picrel) \
2980 (INITIAL_EXEC_P ((info), (picrel)))
2982 #define RELAX_GOTTLSOFF_LOCAL_EXEC_P(info, picrel, value) \
2983 (LOCAL_EXEC_P ((info), (picrel)) \
2984 && TLSMOFF_IN_RANGE_FOR_SETLOS_P((value), (info)))
2989 /* Is this a call instruction? */
2991 {
2997 }
3001 {
3002 /* Replace the call instruction (except the packing bit)
3003 with setlos #tlsmofflo(symbol+offset), gr9. */
3011 }
3014 {
3015 /* Replace the call instruction (except the packing bit)
3016 with ldi @(gr15, #gottlsoff12(symbol+addend)), gr9. */
3024 }
3031 /* Is this an lddi instruction? */
3033 {
3039 }
3044 info))
3045 {
3046 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3047 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3048 Preserve the packing bit. */
3058 }
3062 {
3063 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3064 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3065 Preserve the packing bit. */
3075 }
3078 {
3079 /* Replace lddi @(grB, #gottlsdesc12(symbol+offset), grC
3080 with ldi @(grB, #gottlsoff12(symbol+offset),
3081 gr<C+1>. Preserve the packing bit. If gottlsoff12
3082 overflows, we'll error out, but that's sort-of ok,
3083 since we'd started with gottlsdesc12, that's actually
3084 more demanding. Compiling with -fPIE instead of
3085 -fpie would fix it; linking with --relax should fix
3086 it as well. */
3095 }
3102 /* Is this a sethi instruction? */
3104 {
3110 }
3116 {
3117 /* Replace sethi with a nop. Preserve the packing bit. */
3122 /* Nothing to relocate. */
3124 }
3127 {
3128 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3132 }
3139 /* Is this a setlo or setlos instruction? */
3141 {
3148 }
3154 {
3155 /* Replace setlo/setlos with a nop. Preserve the
3156 packing bit. */
3161 /* Nothing to relocate. */
3163 }
3166 {
3167 /* If the corresponding sethi (if it exists) decayed
3168 to a nop, make sure this becomes (or already is) a
3169 setlos, not setlo. */
3171 {
3174 }
3176 /* Simply decay GOTTLSDESC to GOTTLSOFF. */
3180 }
3187 /* Is this an ldd instruction? */
3189 {
3195 }
3200 info))
3201 {
3202 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3203 with setlos #tlsmofflo(symbol+offset), gr<C+1>.
3204 Preserve the packing bit. */
3214 }
3218 {
3219 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3220 with sethi #tlsmoffhi(symbol+offset), gr<C+1>.
3221 Preserve the packing bit. */
3231 }
3235 {
3236 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3237 with ldi @(grB, #gottlsoff12(symbol+offset), gr<C+1>.
3238 Preserve the packing bit. */
3248 }
3251 {
3252 /* Replace ldd #tlsdesc(symbol+offset)@(grB, grA), grC
3253 with ld #tlsoff(symbol+offset)@(grB, grA), gr<C+1>.
3254 Preserve the packing bit. */
3260 /* #tlsoff(symbol+offset) is just a relaxation
3261 annotation, so there's nothing left to
3262 relocate. */
3264 }
3271 /* Is this a calll or callil instruction? */
3273 {
3280 }
3285 info))
3286 {
3287 /* Replace calll with a nop. Preserve the packing bit. */
3292 /* Nothing to relocate. */
3294 }
3298 {
3299 /* Replace calll with setlo #tlsmofflo(symbol+offset), gr9.
3300 Preserve the packing bit. */
3308 }
3311 {
3312 /* Replace calll with a nop. Preserve the packing bit. */
3317 /* Nothing to relocate. */
3319 }
3326 /* Is this an ldi instruction? */
3328 {
3334 }
3338 {
3339 /* Replace ldi @(grB, #gottlsoff12(symbol+offset), grC
3340 with setlos #tlsmofflo(symbol+offset), grC.
3341 Preserve the packing bit. */
3349 }
3356 /* Is this a sethi instruction? */
3358 {
3364 }
3370 {
3371 /* Replace sethi with a nop. Preserve the packing bit. */
3376 /* Nothing to relocate. */
3378 }
3385 /* Is this a setlo or setlos instruction? */
3387 {
3394 }
3400 {
3401 /* Replace setlo/setlos with a nop. Preserve the
3402 packing bit. */
3407 /* Nothing to relocate. */
3409 }
3416 /* Is this an ld instruction? */
3418 {
3424 }
3428 {
3429 /* Replace ld #gottlsoff(symbol+offset)@(grB, grA), grC
3430 with setlos #tlsmofflo(symbol+offset), grC.
3431 Preserve the packing bit. */
3439 }
3443 {
3444 /* Replace ld #tlsoff(symbol+offset)@(grB, grA), grC
3445 with ldi @(grB, #gottlsoff12(symbol+offset), grC.
3446 Preserve the packing bit. */
3454 }
3461 /* Is this a sethi instruction? */
3463 {
3469 }
3472 info))
3473 {
3474 /* Replace sethi with a nop. Preserve the packing bit. */
3479 /* Nothing to relocate. */
3481 }
3488 /* Is this a setlo or setlos instruction? */
3490 {
3497 }
3500 info))
3501 /* If the corresponding sethi (if it exists) decayed
3502 to a nop, make sure this becomes (or already is) a
3503 setlos, not setlo. */
3504 {
3507 }
3511 /*
3512 There's nothing to relax in these:
3513 R_FRV_TLSDESC_VALUE
3514 R_FRV_TLSOFF
3515 R_FRV_TLSMOFF12
3516 R_FRV_TLSMOFFHI
3517 R_FRV_TLSMOFFLO
3518 R_FRV_TLSMOFF
3519 */
3523 }
3526 {
3532 {
3537 }
3538 /* We don't want to warn on calls to undefined weak symbols,
3539 as calls to them must be protected by non-NULL tests
3540 anyway, and unprotected calls would invoke undefined
3541 behavior. */
3545 else
3585 {
3591 {
3592 /* If the symbol is dynamic and there may be dynamic
3593 symbol resolution because we are or are linked with a
3594 shared library, emit a FUNCDESC relocation such that
3595 the dynamic linker will allocate the function
3596 descriptor. If the symbol needs a non-local function
3597 descriptor but binds locally (e.g., its visibility is
3598 protected, emit a dynamic relocation decayed to
3599 section+offset. */
3603 {
3608 }
3610 {
3612 {
3617 }
3619 }
3620 else
3621 {
3622 /* Otherwise, we know we have a private function
3623 descriptor, so reference it directly. */
3631 }
3633 /* If there is room for dynamic symbol resolution, emit
3634 the dynamic relocation. However, if we're linking an
3635 executable at a fixed location, we won't have emitted a
3636 dynamic symbol entry for the got section, so idx will
3637 be zero, which means we can and should compute the
3638 address of the private descriptor ourselves. */
3641 {
3646 {
3648 input_section
3650 {
3656 }
3658 frvfdpic_gotfixup_section
3660 _bfd_elf_section_offset
3663 + input_section
3666 picrel);
3667 }
3668 }
3672 {
3674 input_section
3676 {
3682 }
3685 _bfd_elf_section_offset
3688 + input_section
3692 }
3693 else
3695 }
3697 /* We want the addend in-place because dynamic
3698 relocations are REL. Setting relocation to it should
3699 arrange for it to be installed. */
3701 }
3707 {
3710 }
3711 /* Fall through. */
3713 {
3717 /* If the symbol is dynamic but binds locally, use
3718 section+offset. */
3720 {
3722 {
3727 }
3729 }
3730 else
3731 {
3734 else
3742 else
3744 }
3746 /* If we're linking an executable at a fixed address, we
3747 can omit the dynamic relocation as long as the symbol
3748 is defined in the current link unit (which is implied
3749 by its output section not being NULL). */
3752 {
3759 {
3761 input_section
3763 {
3769 }
3771 {
3773 frvfdpic_gotfixup_section
3775 _bfd_elf_section_offset
3778 + input_section
3781 picrel);
3783 _frvfdpic_add_rofixup
3786 _bfd_elf_section_offset
3791 }
3792 }
3793 }
3794 else
3795 {
3799 {
3801 input_section
3803 {
3809 }
3812 _bfd_elf_section_offset
3815 + input_section
3819 }
3822 /* We want the addend in-place because dynamic
3823 relocations are REL. Setting relocation to it
3824 should arrange for it to be installed. */
3826 }
3829 {
3830 /* If we've omitted the dynamic relocation, just emit
3831 the fixed addresses of the symbol and of the local
3832 GOT base offset. */
3840 else
3841 /* A function descriptor used for lazy or local
3842 resolving is initialized such that its high word
3843 contains the output section index in which the
3844 PLT entries are located, and the low word
3845 contains the offset of the lazy PLT entry entry
3846 point into that section. */
3851 sec
3854 }
3855 }
3902 {
3905 }
3907 {
3911 }
3912 else
3931 /* These shouldn't be present in input object files. */
3938 /* These are just annotations for relaxation, nothing to do
3939 here. */
3948 }
3951 {
3952 /* If you take this out, remove the #error from fdpic-static-6.d
3953 in the ld testsuite. */
3954 /* This helps catch problems in GCC while we can't do more
3955 than static linking. The idea is to test whether the
3956 input file basename is crt0.o only once. */
3958 silence_segment_error =
3967 /* We don't want duplicate errors for undefined
3968 symbols. */
3971 {
3977 else
3982 }
3986 }
3989 {
3992 /* We need the addend to be applied before we shift the
3993 value right. */
3995 /* Fall through. */
4002 /* Fall through. */
4016 }
4019 {
4023 /* Fall through. */
4025 /* When referencing a GOT entry, a function descriptor or a
4026 PLT, we don't want the addend to apply to the reference,
4027 but rather to the referenced symbol. The actual entry
4028 will have already been created taking the addend into
4029 account, so cancel it out here. */
4046 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF12
4047 here, since we do want to apply the addend to the others.
4048 Note that we've applied the addend to GOTOFFHI before we
4049 shifted it right. */
4057 }
4089 else
4094 {
4098 {
4125 }
4128 {
4133 }
4137 }
4138 }
4141 }
4142 \f
4143 /* Return the section that should be marked against GC for a given
4144 relocation. */
4152 {
4155 {
4159 }
4162 }
4163 \f
4164 /* Hook called by the linker routine which adds symbols from an object
4165 file. We use it to put .comm items in .scomm, and not .comm. */
4167 static bfd_boolean
4176 {
4180 {
4181 /* Common symbols less than or equal to -G nn bytes are
4182 automatically put into .sbss. */
4187 {
4189 (SEC_ALLOC
4190 | SEC_IS_COMMON
4194 }
4198 }
4201 }
4203 /* We need dynamic symbols for every section, since segments can
4204 relocate independently. */
4205 static bfd_boolean
4208 ATTRIBUTE_UNUSED,
4210 {
4212 {
4215 /* If sh_type is yet undecided, assume it could be
4216 SHT_PROGBITS/SHT_NOBITS. */
4220 /* There shouldn't be section relative relocations
4221 against any other section. */
4224 }
4225 }
4227 /* Create a .got section, as well as its additional info field. This
4228 is almost entirely copied from
4229 elflink.c:_bfd_elf_create_got_section(). */
4231 static bfd_boolean
4233 {
4242 /* This function may be called more than once. */
4247 /* Machine specific: although pointers are 32-bits wide, we want the
4248 GOT to be aligned to a 64-bit boundary, such that function
4249 descriptors in it can be accessed with 64-bit loads and
4250 stores. */
4263 {
4268 }
4271 {
4272 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4273 (or .got.plt) section. We don't do this in the linker script
4274 because we don't want to define the symbol if we are not creating
4275 a global offset table. */
4281 /* Machine-specific: we want the symbol for executables as
4282 well. */
4285 }
4287 /* The first bit of the global offset table is the header. */
4290 /* This is the machine-specific part. Create and initialize section
4291 data for the got. */
4293 {
4296 frvfdpic_relocs_info_hash,
4297 frvfdpic_relocs_info_eq,
4310 /* Machine-specific. */
4320 }
4321 else
4322 {
4325 }
4327 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
4328 turns out that we're linking with a different linker script, the
4329 linker script will override it. */
4340 /* Machine-specific: we want the symbol for executables as well. */
4347 /* FDPIC supports Thread Local Storage, and this may require a
4348 procedure linkage table for TLS PLT entries. */
4350 /* This is mostly copied from
4351 elflink.c:_bfd_elf_create_dynamic_sections(). */
4364 /* FRV-specific: remember it. */
4367 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
4368 .plt section. */
4370 {
4376 }
4378 /* FRV-specific: we want rel relocations for the plt. */
4384 /* FRV-specific: remember it. */
4388 }
4390 /* Make sure the got and plt sections exist, and that our pointers in
4391 the link hash table point to them. */
4393 static bfd_boolean
4395 {
4396 /* This is mostly copied from
4397 elflink.c:_bfd_elf_create_dynamic_sections(). */
4398 flagword flags;
4405 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4406 .rel[a].bss sections. */
4408 /* FRV-specific: we want to create the GOT and the PLT in the FRV
4409 way. */
4413 /* FRV-specific: make sure we created everything we wanted. */
4420 {
4421 /* The .dynbss section is a place to put symbols which are defined
4422 by dynamic objects, are referenced by regular objects, and are
4423 not functions. We must allocate space for them in the process
4424 image and use a R_*_COPY reloc to tell the dynamic linker to
4425 initialize them at run time. The linker script puts the .dynbss
4426 section into the .bss section of the final image. */
4432 /* The .rel[a].bss section holds copy relocs. This section is not
4433 normally needed. We need to create it here, though, so that the
4434 linker will map it to an output section. We can't just create it
4435 only if we need it, because we will not know whether we need it
4436 until we have seen all the input files, and the first time the
4437 main linker code calls BFD after examining all the input files
4438 (size_dynamic_sections) the input sections have already been
4439 mapped to the output sections. If the section turns out not to
4440 be needed, we can discard it later. We will never need this
4441 section when generating a shared object, since they do not use
4442 copy relocs. */
4444 {
4452 }
4453 }
4456 }
4458 /* Compute the total GOT and PLT size required by each symbol in each
4459 range. Symbols may require up to 4 words in the GOT: an entry
4460 pointing to the symbol, an entry pointing to its function
4461 descriptor, and a private function descriptors taking two
4462 words. */
4464 static void
4467 {
4468 /* Allocate space for a GOT entry pointing to the symbol. */
4475 else
4479 /* Allocate space for a GOT entry pointing to the function
4480 descriptor. */
4487 else
4491 /* Decide whether we need a PLT entry, a function descriptor in the
4492 GOT, and a lazy PLT entry for this symbol. */
4506 /* Allocate space for a function descriptor. */
4515 else
4521 }
4523 /* Compute the total GOT size required by each TLS symbol in each
4524 range. Symbols may require up to 5 words in the GOT: an entry
4525 holding the TLS offset for the symbol, and an entry with a full TLS
4526 descriptor taking 4 words. */
4528 static void
4531 bfd_boolean subtract)
4532 {
4535 /* Allocate space for a GOT entry with the TLS offset of the
4536 symbol. */
4543 else
4547 /* If there's any TLSOFF relocation, mark the output file as not
4548 suitable for dlopening. This mark will remain even if we relax
4549 all such relocations, but this is not a problem, since we'll only
4550 do so for executables, and we definitely don't want anyone
4551 dlopening executables. */
4555 /* Allocate space for a TLS descriptor. */
4564 else
4567 }
4569 /* Compute the number of dynamic relocations and fixups that a symbol
4570 requires, and add (or subtract) from the grand and per-symbol
4571 totals. */
4573 static void
4576 bfd_boolean subtract)
4577 {
4581 {
4585 /* In the executable, TLS relocations to symbols that bind
4586 locally (including those that resolve to global TLS offsets)
4587 are resolved immediately, without any need for fixups or
4588 dynamic relocations. In shared libraries, however, we must
4589 emit dynamic relocations even for local symbols, because we
4590 don't know the module id the library is going to get at
4591 run-time, nor its TLS base offset. */
4596 }
4597 else
4598 {
4600 {
4606 }
4607 else
4608 {
4611 }
4615 {
4619 }
4620 else
4622 }
4625 {
4629 }
4636 }
4638 /* Look for opportunities to relax TLS relocations. We can assume
4639 we're linking the main executable or a static-tls library, since
4640 otherwise we wouldn't have got here. When relaxing, we have to
4641 first undo any previous accounting of TLS uses of fixups, dynamic
4642 relocations, GOT and PLT entries. */
4644 static void
4647 bfd_boolean relaxing)
4648 {
4655 {
4657 {
4661 }
4663 /* When linking an executable, we can always decay GOTTLSDESC to
4664 TLSMOFF, if the symbol is local, or GOTTLSOFF, otherwise.
4665 When linking a static-tls shared library, using TLSMOFF is
4666 not an option, but we can still use GOTTLSOFF. When decaying
4667 to GOTTLSOFF, we must keep the GOT entry in range. We know
4668 it has to fit because we'll be trading the 4 words of hte TLS
4669 descriptor for a single word in the same range. */
4673 {
4677 }
4680 }
4682 /* We can only decay TLSOFFs or call #gettlsoff to TLSMOFF in the
4683 main executable. We have to check whether the symbol's TLSOFF is
4684 in range for a setlos. For symbols with a hash entry, we can
4685 determine exactly what to do; for others locals, we don't have
4686 addresses handy, so we use the size of the TLS section as an
4687 approximation. If we get it wrong, we'll retain a GOT entry
4688 holding the TLS offset (without dynamic relocations or fixups),
4689 but we'll still optimize away the loads from it. Since TLS sizes
4690 are generally very small, it's probably not worth attempting to
4691 do better than this. */
4697 /* The above may hold for an undefweak TLS symbol, so make
4698 sure we don't have this case before accessing def.value
4699 and def.section. */
4711 {
4713 {
4717 }
4721 }
4723 /* We can decay `call #gettlsoff' to a ldi #tlsoff if we already
4724 have a #gottlsoff12 relocation for this entry, or if we can fit
4725 one more in the 12-bit (and 16-bit) ranges. */
4728 || (relaxing
4733 {
4735 {
4739 }
4743 }
4746 {
4749 }
4752 }
4754 /* Compute the total GOT and PLT size required by each symbol in each range. *
4755 Symbols may require up to 4 words in the GOT: an entry pointing to
4756 the symbol, an entry pointing to its function descriptor, and a
4757 private function descriptors taking two words. */
4759 static int
4761 {
4769 else
4770 {
4773 }
4776 }
4778 /* Determine the positive and negative ranges to be used by each
4779 offset range in the GOT. FDCUR and CUR, that must be aligned to a
4780 double-word boundary, are the minimum (negative) and maximum
4781 (positive) GOT offsets already used by previous ranges, except for
4782 an ODD entry that may have been left behind. GOT and FD indicate
4783 the size of GOT entries and function descriptors that must be
4784 placed within the range from -WRAP to WRAP. If there's room left,
4785 up to FDPLT bytes should be reserved for additional function
4786 descriptors. */
4790 bfd_signed_vma fdcur,
4791 bfd_signed_vma odd,
4792 bfd_signed_vma cur,
4793 bfd_vma got,
4794 bfd_vma fd,
4795 bfd_vma fdplt,
4796 bfd_vma tlsd,
4797 bfd_vma tlsdplt,
4798 bfd_vma wrap)
4799 {
4803 /* Start at the given initial points. */
4807 /* If we had an incoming odd word and we have any got entries that
4808 are going to use it, consume it, otherwise leave gad->odd at
4809 zero. We might force gad->odd to zero and return the incoming
4810 odd such that it is used by the next range, but then GOT entries
4811 might appear to be out of order and we wouldn't be able to
4812 shorten the GOT by one word if it turns out to end with an
4813 unpaired GOT entry. */
4815 {
4819 }
4820 else
4823 /* If we're left with an unpaired GOT entry, compute its location
4824 such that we can return it. Otherwise, if got doesn't require an
4825 odd number of words here, either odd was already zero in the
4826 block above, or it was set to zero because got was non-zero, or
4827 got was already zero. In the latter case, we want the value of
4828 odd to carry over to the return statement, so we don't want to
4829 reset odd unless the condition below is true. */
4831 {
4834 }
4836 /* Compute the tentative boundaries of this range. */
4841 /* If function descriptors took too much space, wrap some of them
4842 around. */
4844 {
4847 }
4849 /* If GOT entries took too much space, wrap some of them around.
4850 This may well cause gad->min to become lower than wrapmin. This
4851 will cause a relocation overflow later on, so we don't have to
4852 report it here . */
4854 {
4857 }
4859 /* Add TLS descriptors. */
4864 /* If TLS descriptors took too much space, wrap an integral number
4865 of them around. */
4867 {
4875 }
4877 /* If there is space left and we have function descriptors
4878 referenced in PLT entries that could take advantage of shorter
4879 offsets, place them now. */
4881 {
4882 bfd_vma fds;
4886 else
4893 }
4895 /* If there is more space left, try to place some more function
4896 descriptors for PLT entries. */
4898 {
4899 bfd_vma fds;
4903 else
4910 }
4912 /* If there is space left and we have TLS descriptors referenced in
4913 PLT entries that could take advantage of shorter offsets, place
4914 them now. */
4916 {
4917 bfd_vma tlsds;
4921 else
4927 }
4929 /* If there is more space left, try to place some more TLS
4930 descriptors for PLT entries. Although we could try to fit an
4931 additional TLS descriptor with half of it just before before the
4932 wrap point and another right past the wrap point, this might
4933 cause us to run out of space for the next region, so don't do
4934 it. */
4936 {
4937 bfd_vma tlsds;
4941 else
4947 }
4949 /* If odd was initially computed as an offset past the wrap point,
4950 wrap it around. */
4954 /* _frvfdpic_get_got_entry() below will always wrap gad->cur if needed
4955 before returning, so do it here too. This guarantees that,
4956 should cur and fdcur meet at the wrap point, they'll both be
4957 equal to min. */
4961 /* Ditto for _frvfdpic_get_tlsdesc_entry(). */
4967 }
4969 /* Compute the location of the next GOT entry, given the allocation
4970 data for a range. */
4974 {
4975 bfd_signed_vma ret;
4978 {
4979 /* If there was an odd word left behind, use it. */
4982 }
4983 else
4984 {
4985 /* Otherwise, use the word pointed to by cur, reserve the next
4986 as an odd word, and skip to the next pair of words, possibly
4987 wrapping around. */
4993 }
4996 }
4998 /* Compute the location of the next function descriptor entry in the
4999 GOT, given the allocation data for a range. */
5003 {
5004 /* If we're at the bottom, wrap around, and only then allocate the
5005 next pair of words. */
5009 }
5011 /* Compute the location of the next TLS descriptor entry in the GOT,
5012 given the allocation data for a range. */
5015 {
5016 bfd_signed_vma ret;
5022 /* If we're at the top of the region, wrap around to the bottom. */
5027 }
5029 /* Assign GOT offsets for every GOT entry and function descriptor.
5030 Doing everything in a single pass is tricky. */
5032 static int
5034 {
5055 {
5058 }
5062 {
5065 }
5067 {
5070 }
5084 {
5087 }
5091 {
5094 }
5096 {
5099 }
5104 }
5106 /* Assign GOT offsets to private function descriptors used by PLT
5107 entries (or referenced by 32-bit offsets), as well as PLT entries
5108 and lazy PLT entries. */
5110 static int
5112 {
5120 {
5123 /* We use the section's raw size to mark the location of the
5124 next PLT entry. */
5127 /* Figure out the length of this PLT entry based on the
5128 addressing mode we need to reach the function descriptor. */
5136 else
5140 }
5143 {
5146 /* If this entry is the one that gets the resolver stub, account
5147 for the additional instruction. */
5151 }
5154 {
5157 entry->tlsplt_entry
5163 {
5165 /* FIXME: here we use the size of the TLS section
5166 as an upper bound for the value of the TLS
5167 symbol, because we may not know the exact value
5168 yet. If we get it wrong, we'll just waste a
5169 word in the PLT, and we should never get even
5170 close to 32 KiB of TLS anyway. */
5175 else
5177 }
5179 {
5186 else
5188 }
5189 else
5190 {
5199 else
5201 }
5204 }
5207 }
5209 /* Cancel out any effects of calling _frvfdpic_assign_got_entries and
5210 _frvfdpic_assign_plt_entries. */
5212 static int
5214 {
5227 }
5229 /* Follow indirect and warning hash entries so that each got entry
5230 points to the final symbol definition. P must point to a pointer
5231 to the hash table we're traversing. Since this traversal may
5232 modify the hash table, we set this pointer to NULL to indicate
5233 we've made a potentially-destructive change to the hash table, so
5234 the traversal must be restarted. */
5235 static int
5237 {
5242 {
5254 NO_INSERT);
5257 {
5258 /* Merge the two entries. */
5262 }
5266 /* If we can't find this entry with the new bfd hash, re-insert
5267 it, and get the traversal restarted. */
5269 {
5274 /* Abort the traversal, since the whole table may have
5275 moved, and leave it up to the parent to restart the
5276 process. */
5279 }
5280 }
5283 }
5285 /* Compute the total size of the GOT, the PLT, the dynamic relocations
5286 section and the rofixup section. Assign locations for GOT and PLT
5287 entries. */
5289 static bfd_boolean
5292 {
5293 bfd_signed_vma odd;
5302 /* Compute the total size taken by entries in the 12-bit and 16-bit
5303 ranges, to tell how many PLT function descriptors we can bring
5304 into the 12-bit range without causing the 16-bit range to
5305 overflow. */
5311 else
5314 {
5317 }
5318 else
5323 /* Determine the ranges of GOT offsets that we can use for each
5324 range of addressing modes. */
5327 odd,
5331 limit,
5333 tlslimit,
5337 odd,
5349 odd,
5362 /* Now assign (most) GOT offsets. */
5364 gpinfop);
5368 /* If an odd word is the last word of the GOT, we don't need this
5369 word to be part of the GOT. */
5375 {
5378 }
5379 /* This will be non-NULL during relaxation. The assumption is that
5380 the size of one of these sections will never grow, only shrink,
5381 so we can use the larger buffer we allocated before. */
5383 {
5389 }
5392 /* Subtract the number of lzplt entries, since those will generate
5393 relocations in the pltrel section. */
5397 else
5402 {
5408 }
5414 {
5420 }
5423 {
5430 {
5436 }
5437 }
5439 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
5440 such that there's room for the additional instruction needed to
5441 call the resolver. Since _frvfdpic_assign_got_entries didn't
5442 account for them, our block size is 4 bytes smaller than the real
5443 block size. */
5445 {
5449 }
5451 /* Reset it, such that _frvfdpic_assign_plt_entries() can use it to
5452 actually assign lazy PLT entries addresses. */
5455 /* Save information that we're going to need to generate GOT and PLT
5456 entries. */
5467 /* Allocate a ret statement at plt_initial_offset, to be used by
5468 locally-resolved TLS descriptors. */
5473 gpinfop);
5475 /* Allocate the PLT section contents only after
5476 _frvfdpic_assign_plt_entries has a chance to add the size of the
5477 non-lazy PLT entries. */
5479 {
5483 {
5489 }
5490 }
5493 }
5495 /* Set the sizes of the dynamic sections. */
5497 static bfd_boolean
5500 {
5509 {
5510 /* Set the contents of the .interp section to the interpreter. */
5512 {
5517 }
5518 }
5524 {
5531 }
5536 /* Allocate space to save the summary information, we're going to
5537 use it if we're doing relaxations. */
5544 {
5561 }
5564 }
5566 static bfd_boolean
5569 {
5571 {
5574 /* Force a PT_GNU_STACK segment to be created. */
5578 /* Define __stacksize if it's not defined yet. */
5584 {
5597 /* This one must NOT be hidden. */
5598 }
5599 }
5602 }
5604 /* Look for opportunities to relax TLS relocations. We can assume
5605 we're linking the main executable or a static-tls library, since
5606 otherwise we wouldn't have got here. */
5608 static int
5610 {
5617 }
5619 static bfd_boolean
5622 {
5625 /* If we return early, we didn't change anything. */
5628 /* We'll do our thing when requested to relax the GOT section. */
5632 /* We can only relax when linking the main executable or a library
5633 that can't be dlopened. */
5637 /* If there isn't a TLS section for this binary, we can't do
5638 anything about its TLS relocations (it probably doesn't have
5639 any. */
5646 /* Now look for opportunities to relax, adjusting the GOT usage
5647 as needed. */
5649 _frvfdpic_relax_got_plt_entries,
5652 /* If we changed anything, reset and re-assign GOT and PLT entries. */
5655 {
5656 /* Clear GOT and PLT assignments. */
5658 _frvfdpic_reset_got_plt_entries,
5659 NULL);
5661 /* The owner of the TLS section is the output bfd. There should
5662 be a better way to get to it. */
5667 /* Repeat until we don't make any further changes. We could fail to
5668 introduce changes in a round if, for example, the 12-bit range is
5669 full, but we later release some space by getting rid of TLS
5670 descriptors in it. We have to repeat the whole process because
5671 we might have changed the size of a section processed before this
5672 one. */
5674 }
5677 }
5679 static bfd_boolean
5682 {
5687 /* objcopy and strip preserve what's already there using
5688 elf32_frvfdpic_copy_private_bfd_data (). */
5697 {
5700 /* Obtain the pointer to the __stacksize symbol. */
5704 {
5709 }
5711 /* Set the header p_memsz from the symbol value. We
5712 intentionally ignore the symbol section. */
5715 else
5719 }
5722 }
5724 /* Fill in code and data in dynamic sections. */
5726 static bfd_boolean
5729 {
5730 /* Nothing to be done for non-FDPIC. */
5732 }
5734 static bfd_boolean
5737 {
5744 {
5746 }
5748 {
5754 {
5766 {
5767 error:
5771 }
5778 {
5779 bfd_vma value =
5788 }
5789 }
5790 }
5792 {
5796 }
5800 {
5812 {
5813 Elf_Internal_Dyn dyn;
5818 {
5840 }
5841 }
5842 }
5845 }
5847 /* Adjust a symbol defined by a dynamic object and referenced by a
5848 regular object. */
5850 static bfd_boolean
5851 elf32_frvfdpic_adjust_dynamic_symbol
5854 {
5859 /* Make sure we know what is going on here. */
5866 /* If this is a weak symbol, and there is a real definition, the
5867 processor independent code will have arranged for us to see the
5868 real definition first, and we can just use the same value. */
5870 {
5875 }
5878 }
5880 /* Perform any actions needed for dynamic symbols. */
5882 static bfd_boolean
5883 elf32_frvfdpic_finish_dynamic_symbol
5888 {
5890 }
5892 /* Decide whether to attempt to turn absptr or lsda encodings in
5893 shared libraries into pcrel within the given input section. */
5895 static bfd_boolean
5896 frvfdpic_elf_use_relative_eh_frame
5900 {
5901 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
5903 }
5905 /* Adjust the contents of an eh_frame_hdr section before they're output. */
5907 static bfd_byte
5913 {
5925 == (_frvfdpic_osec_to_segment
5934 }
5936 /* Look through the relocs for a section during the first phase.
5938 Besides handling virtual table relocs for gc, we have to deal with
5939 all sorts of PIC-related relocations. We describe below the
5940 general plan on how to handle such relocations, even though we only
5941 collect information at this point, storing them in hash tables for
5942 perusal of later passes.
5944 32 relocations are propagated to the linker output when creating
5945 position-independent output. LO16 and HI16 relocations are not
5946 supposed to be encountered in this case.
5948 LABEL16 should always be resolvable by the linker, since it's only
5949 used by branches.
5951 LABEL24, on the other hand, is used by calls. If it turns out that
5952 the target of a call is a dynamic symbol, a PLT entry must be
5953 created for it, which triggers the creation of a private function
5954 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
5956 GPREL relocations require the referenced symbol to be in the same
5957 segment as _gp, but this can only be checked later.
5959 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
5960 exist. LABEL24 might as well, since it may require a PLT entry,
5961 that will require a got.
5963 Non-FUNCDESC GOT relocations require a GOT entry to be created
5964 regardless of whether the symbol is dynamic. However, since a
5965 global symbol that turns out to not be exported may have the same
5966 address of a non-dynamic symbol, we don't assign GOT entries at
5967 this point, such that we can share them in this case. A relocation
5968 for the GOT entry always has to be created, be it to offset a
5969 private symbol by the section load address, be it to get the symbol
5970 resolved dynamically.
5972 FUNCDESC GOT relocations require a GOT entry to be created, and
5973 handled as if a FUNCDESC relocation was applied to the GOT entry in
5974 an object file.
5976 FUNCDESC relocations referencing a symbol that turns out to NOT be
5977 dynamic cause a private function descriptor to be created. The
5978 FUNCDESC relocation then decays to a 32 relocation that points at
5979 the private descriptor. If the symbol is dynamic, the FUNCDESC
5980 relocation is propagated to the linker output, such that the
5981 dynamic linker creates the canonical descriptor, pointing to the
5982 dynamically-resolved definition of the function.
5984 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
5985 symbols that are assigned to the same segment as the GOT, but we
5986 can only check this later, after we know the complete set of
5987 symbols defined and/or exported.
5989 FUNCDESC GOTOFF relocations require a function descriptor to be
5990 created and, unless lazy binding is disabled or the symbol is not
5991 dynamic, a lazy PLT entry. Since we can't tell at this point
5992 whether a symbol is going to be dynamic, we have to decide later
5993 whether to create a lazy PLT entry or bind the descriptor directly
5994 to the private function.
5996 FUNCDESC_VALUE relocations are not supposed to be present in object
5997 files, but they may very well be simply propagated to the linker
5998 output, since they have no side effect.
6001 A function descriptor always requires a FUNCDESC_VALUE relocation.
6002 Whether it's in .plt.rel or not depends on whether lazy binding is
6003 enabled and on whether the referenced symbol is dynamic.
6005 The existence of a lazy PLT requires the resolverStub lazy PLT
6006 entry to be present.
6009 As for assignment of GOT, PLT and lazy PLT entries, and private
6010 descriptors, we might do them all sequentially, but we can do
6011 better than that. For example, we can place GOT entries and
6012 private function descriptors referenced using 12-bit operands
6013 closer to the PIC register value, such that these relocations don't
6014 overflow. Those that are only referenced with LO16 relocations
6015 could come next, but we may as well place PLT-required function
6016 descriptors in the 12-bit range to make them shorter. Symbols
6017 referenced with LO16/HI16 may come next, but we may place
6018 additional function descriptors in the 16-bit range if we can
6019 reliably tell that we've already placed entries that are ever
6020 referenced with only LO16. PLT entries are therefore generated as
6021 small as possible, while not introducing relocation overflows in
6022 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
6023 generated before or after PLT entries, but not intermingled with
6024 them, such that we can have more lazy PLT entries in range for a
6025 branch to the resolverStub. The resolverStub should be emitted at
6026 the most distant location from the first lazy PLT entry such that
6027 it's still in range for a branch, or closer, if there isn't a need
6028 for so many lazy PLT entries. Additional lazy PLT entries may be
6029 emitted after the resolverStub, as long as branches are still in
6030 range. If the branch goes out of range, longer lazy PLT entries
6031 are emitted.
6033 We could further optimize PLT and lazy PLT entries by giving them
6034 priority in assignment to closer-to-gr17 locations depending on the
6035 number of occurrences of references to them (assuming a function
6036 that's called more often is more important for performance, so its
6037 PLT entry should be faster), or taking hints from the compiler.
6038 Given infinite time and money... :-) */
6040 static bfd_boolean
6046 {
6066 {
6073 else
6074 {
6079 }
6082 {
6112 /* Fall through. */
6120 {
6124 }
6126 {
6129 }
6131 {
6134 {
6141 }
6142 picrel
6146 }
6147 else
6158 }
6161 {
6171 /* Fall through. */
6259 /* This relocation describes the C++ object vtable hierarchy.
6260 Reconstruct it for later use during GC. */
6266 /* This relocation describes which C++ vtable entries are actually
6267 used. Record for later use during GC. */
6287 bad_reloc:
6292 }
6293 }
6296 }
6298 \f
6299 /* Return the machine subcode from the ELF e_flags header. */
6301 static int
6304 {
6306 {
6316 }
6319 }
6321 /* Set the right machine number for a FRV ELF file. */
6323 static bfd_boolean
6326 {
6330 }
6331 \f
6332 /* Function to set the ELF flag bits. */
6334 static bfd_boolean
6337 flagword flags;
6338 {
6342 }
6344 /* Copy backend specific data from one object module to another. */
6346 static bfd_boolean
6350 {
6361 }
6363 /* Return true if the architecture described by elf header flag
6364 EXTENSION is an extension of the architecture described by BASE. */
6366 static bfd_boolean
6368 {
6372 /* CPU_GENERIC code can be merged with code for a specific
6373 architecture, in which case the result is marked as being
6374 for the specific architecture. Everything is therefore
6375 an extension of CPU_GENERIC. */
6388 }
6390 static bfd_boolean
6392 {
6406 /* Copy the stack size. */
6409 {
6414 {
6417 /* Rewrite the phdrs, since we're only called after they
6418 were first written. */
6426 }
6429 }
6432 }
6434 /* Merge backend specific data from an object file to the output
6435 object file when linking. */
6437 static bfd_boolean
6441 {
6455 #ifdef DEBUG
6459 #endif
6462 {
6465 }
6468 ;
6471 {
6472 /* Warn if different # of gprs are used. Note, 0 means nothing is
6473 said about the size of gprs. */
6477 ;
6480 ;
6485 else
6486 {
6488 {
6492 }
6495 {
6499 }
6500 }
6502 /* Warn if different # of fprs are used. Note, 0 means nothing is
6503 said about the size of fprs. */
6507 ;
6510 ;
6515 else
6516 {
6518 {
6523 }
6526 {
6531 }
6532 }
6534 /* Warn if different dword support was used. Note, 0 means nothing is
6535 said about the dword support. */
6539 ;
6542 ;
6547 else
6548 {
6550 {
6554 }
6557 {
6561 }
6562 }
6564 /* Or in flags that accumulate (ie, if one module uses it, mark that the
6565 feature is used. */
6567 | EF_FRV_MEDIA
6568 | EF_FRV_MULADD
6571 /* If any module was compiled without -G0, clear the G0 bit. */
6575 /* If any module was compiled without -mnopack, clear the mnopack bit. */
6579 /* We don't have to do anything if the pic flags are the same, or the new
6580 module(s) were compiled with -mlibrary-pic. */
6584 ;
6586 /* If the old module(s) were compiled with -mlibrary-pic, copy in the pic
6587 flags if any from the new module. */
6591 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
6595 /* One module was compiled for pic and the other was not, see if we have
6596 had any relocations that are not pic-safe. */
6597 else
6598 {
6601 else
6602 {
6604 #ifndef FRV_NO_PIC_ERROR
6610 #endif
6611 }
6612 }
6614 /* Warn if different cpu is used (allow a specific cpu to override
6615 the generic cpu). */
6619 ;
6624 else
6625 {
6627 {
6638 }
6641 {
6652 }
6653 }
6655 /* Print out any mismatches from above. */
6657 {
6662 }
6664 /* Warn about any other mismatches */
6668 {
6674 }
6675 }
6677 /* If the cpu is -mcpu=simple, then set the -mnopack bit. */
6681 /* Update the old flags now with changes made above. */
6689 {
6695 else
6699 }
6705 }
6707 \f
6708 bfd_boolean
6711 PTR ptr;
6712 {
6714 flagword flags;
6718 /* Print normal ELF private data. */
6725 {
6735 }
6738 {
6742 }
6745 {
6750 }
6753 {
6757 }
6788 }
6790 \f
6791 /* Support for core dump NOTE sections. */
6793 static bfd_boolean
6795 {
6800 {
6804 /* The Linux/FRV elf_prstatus struct is 268 bytes long. The other
6805 hardcoded offsets and sizes listed below (and contained within
6806 this lexical block) refer to fields in the target's elf_prstatus
6807 struct. */
6809 /* `pr_cursig' is at offset 12. */
6812 /* `pr_pid' is at offset 24. */
6815 /* `pr_reg' is at offset 72. */
6818 /* Most grok_prstatus implementations set `raw_size' to the size
6819 of the pr_reg field. For Linux/FRV, we set `raw_size' to be
6820 the size of `pr_reg' plus the size of `pr_exec_fdpic_loadmap'
6821 and `pr_interp_fdpic_loadmap', both of which (by design)
6822 immediately follow `pr_reg'. This will allow these fields to
6823 be viewed by GDB as registers.
6825 `pr_reg' is 184 bytes long. `pr_exec_fdpic_loadmap' and
6826 `pr_interp_fdpic_loadmap' are 4 bytes each. */
6830 }
6832 /* Make a ".reg/999" section. */
6835 }
6837 static bfd_boolean
6839 {
6841 {
6845 /* The Linux/FRV elf_prpsinfo struct is 124 bytes long. */
6848 /* `pr_fname' is found at offset 28 and is 16 bytes long. */
6852 /* `pr_psargs' is found at offset 44 and is 80 bytes long. */
6855 }
6857 /* Note that for some reason, a spurious space is tacked
6858 onto the end of the args in some (at least one anyway)
6859 implementations, so strip it off if it exists. */
6861 {
6867 }
6870 }
6871 #define ELF_ARCH bfd_arch_frv
6872 #define ELF_MACHINE_CODE EM_CYGNUS_FRV
6873 #define ELF_MAXPAGESIZE 0x1000
6875 #define TARGET_BIG_SYM bfd_elf32_frv_vec
6878 #define elf_info_to_howto frv_info_to_howto_rela
6879 #define elf_backend_relocate_section elf32_frv_relocate_section
6880 #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
6881 #define elf_backend_check_relocs elf32_frv_check_relocs
6882 #define elf_backend_object_p elf32_frv_object_p
6883 #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
6885 #define elf_backend_can_gc_sections 1
6886 #define elf_backend_rela_normal 1
6888 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
6889 #define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
6890 #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
6891 #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
6892 #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
6893 #define bfd_elf32_bfd_print_private_bfd_data frv_elf_print_private_bfd_data
6895 #define elf_backend_want_got_sym 1
6896 #define elf_backend_got_header_size 0
6897 #define elf_backend_want_got_plt 0
6898 #define elf_backend_plt_readonly 1
6899 #define elf_backend_want_plt_sym 0
6900 #define elf_backend_plt_header_size 0
6902 #define elf_backend_finish_dynamic_sections \
6903 elf32_frv_finish_dynamic_sections
6905 #define elf_backend_grok_prstatus elf32_frv_grok_prstatus
6906 #define elf_backend_grok_psinfo elf32_frv_grok_psinfo
6910 #undef ELF_MAXPAGESIZE
6911 #define ELF_MAXPAGESIZE 0x4000
6913 #undef TARGET_BIG_SYM
6914 #define TARGET_BIG_SYM bfd_elf32_frvfdpic_vec
6915 #undef TARGET_BIG_NAME
6917 #undef elf32_bed
6918 #define elf32_bed elf32_frvfdpic_bed
6920 #undef elf_info_to_howto_rel
6921 #define elf_info_to_howto_rel frvfdpic_info_to_howto_rel
6923 #undef bfd_elf32_bfd_link_hash_table_create
6924 #define bfd_elf32_bfd_link_hash_table_create \
6925 frvfdpic_elf_link_hash_table_create
6926 #undef elf_backend_always_size_sections
6927 #define elf_backend_always_size_sections \
6928 elf32_frvfdpic_always_size_sections
6929 #undef elf_backend_modify_program_headers
6930 #define elf_backend_modify_program_headers \
6931 elf32_frvfdpic_modify_program_headers
6932 #undef bfd_elf32_bfd_copy_private_bfd_data
6933 #define bfd_elf32_bfd_copy_private_bfd_data \
6934 elf32_frvfdpic_copy_private_bfd_data
6936 #undef elf_backend_create_dynamic_sections
6937 #define elf_backend_create_dynamic_sections \
6938 elf32_frvfdpic_create_dynamic_sections
6939 #undef elf_backend_adjust_dynamic_symbol
6940 #define elf_backend_adjust_dynamic_symbol \
6941 elf32_frvfdpic_adjust_dynamic_symbol
6942 #undef elf_backend_size_dynamic_sections
6943 #define elf_backend_size_dynamic_sections \
6944 elf32_frvfdpic_size_dynamic_sections
6945 #undef bfd_elf32_bfd_relax_section
6946 #define bfd_elf32_bfd_relax_section \
6947 elf32_frvfdpic_relax_section
6948 #undef elf_backend_finish_dynamic_symbol
6949 #define elf_backend_finish_dynamic_symbol \
6950 elf32_frvfdpic_finish_dynamic_symbol
6951 #undef elf_backend_finish_dynamic_sections
6952 #define elf_backend_finish_dynamic_sections \
6953 elf32_frvfdpic_finish_dynamic_sections
6955 #undef elf_backend_can_make_relative_eh_frame
6956 #define elf_backend_can_make_relative_eh_frame \
6957 frvfdpic_elf_use_relative_eh_frame
6958 #undef elf_backend_can_make_lsda_relative_eh_frame
6959 #define elf_backend_can_make_lsda_relative_eh_frame \
6960 frvfdpic_elf_use_relative_eh_frame
6961 #undef elf_backend_encode_eh_address
6962 #define elf_backend_encode_eh_address \
6963 frvfdpic_elf_encode_eh_address
6965 #undef elf_backend_may_use_rel_p
6966 #define elf_backend_may_use_rel_p 1
6967 #undef elf_backend_may_use_rela_p
6968 #define elf_backend_may_use_rela_p 1
6969 /* We use REL for dynamic relocations only. */
6970 #undef elf_backend_default_use_rela_p
6971 #define elf_backend_default_use_rela_p 1
6973 #undef elf_backend_omit_section_dynsym
6974 #define elf_backend_omit_section_dynsym _frvfdpic_link_omit_section_dynsym