| blob | 3561d8be2de811ec093de015d887ee58b6fbd7d7 |
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
37 /* RELA relocations are used here. */
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
69 {
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
81 {
90 };
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
96 {
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
108 {
117 };
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158 \f
162 /* This reloc does nothing. */
177 /* A standard 32 bit relocation. */
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
208 /* A standard 16 bit relocation. */
223 /* A 16 bit relocation without overflow. */
238 /* The high order 16 bits of an address. */
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
319 /* A relative 26 bit branch; the lower two bits must be zero. */
334 /* A relative 16 bit branch; the lower two bits must be zero. */
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
498 /* Marks a procedure linkage table entry for a symbol. */
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
547 /* Like R_PPC_ADDR32, but may be unaligned. */
562 /* Like R_PPC_ADDR16, but may be unaligned. */
577 /* 32-bit PC relative */
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
688 /* 16-bit section relative relocation. */
703 /* 16-bit lower half section relative relocation. */
718 /* 16-bit upper half section relative relocation. */
733 /* 16-bit upper half adjusted section relative relocation. */
748 /* Marker reloc for TLS. */
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
796 /* A 16 bit dtprel reloc. */
811 /* Like DTPREL16, but no overflow. */
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
872 /* A 16 bit tprel reloc. */
887 /* Like TPREL16, but no overflow. */
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
949 /* Like GOT_TLSGD16, but no overflow. */
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
1011 /* Like GOT_TLSLD16, but no overflow. */
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1072 /* Like GOT_DTPREL16, but no overflow. */
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1133 /* Like GOT_TPREL16, but no overflow. */
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1181 /* 32 bit value resulting from the addend minus the symbol. */
1196 /* 16 bit value resulting from the addend minus the symbol. */
1211 /* 16 bit value resulting from the addend minus the symbol. */
1226 /* The high order 16 bits of the addend minus the symbol. */
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1349 /* A 16 bit relative relocation. */
1364 /* A 16 bit relative relocation without overflow. */
1379 /* The high order 16 bits of a relative address. */
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1410 /* GNU extension to record C++ vtable hierarchy. */
1425 /* GNU extension to record C++ vtable member usage. */
1440 /* Phony reloc to handle AIX style TOC entries. */
1454 };
1455 \f
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1458 static void
1460 {
1465 i++)
1466 {
1472 }
1473 }
1477 bfd_reloc_code_real_type code)
1478 {
1481 /* Initialize howto table if not already done. */
1486 {
1575 }
1578 };
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1582 static void
1586 {
1587 /* Initialize howto table if not already done. */
1593 }
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1597 static bfd_reloc_status_type
1605 {
1606 bfd_vma relocation;
1609 {
1612 }
1619 else
1631 }
1633 static bfd_reloc_status_type
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1650 {
1655 }
1657 }
1658 \f
1659 /* Sections created by the linker. */
1662 {
1663 /* Pointer to the bfd section. */
1665 /* Section name. */
1667 /* Associated bss section name. */
1669 /* Associated symbol name. */
1671 /* Associated symbol. */
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1680 {
1681 /* next allocated pointer for this symbol */
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1691 struct ppc_elf_obj_tdata
1692 {
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1698 };
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1706 /* Override the generic function because we store some extras. */
1708 static bfd_boolean
1710 {
1712 {
1717 }
1719 }
1721 /* Fix bad default arch selected for a 32 bit input bfd when the
1722 default is 64 bit. */
1724 static bfd_boolean
1726 {
1728 {
1732 {
1733 /* Relies on arch after 64 bit default being 32 bit default. */
1736 }
1737 }
1739 }
1741 /* Function to set whether a module needs the -mrelocatable bit set. */
1743 static bfd_boolean
1745 {
1752 }
1754 /* Support for core dump NOTE sections. */
1756 static bfd_boolean
1758 {
1763 {
1768 /* pr_cursig */
1771 /* pr_pid */
1774 /* pr_reg */
1779 }
1781 /* Make a ".reg/999" section. */
1784 }
1786 static bfd_boolean
1788 {
1790 {
1799 }
1801 /* Note that for some reason, a spurious space is tacked
1802 onto the end of the args in some (at least one anyway)
1803 implementations, so strip it off if it exists. */
1805 {
1811 }
1814 }
1816 /* Return address for Ith PLT stub in section PLT, for relocation REL
1817 or (bfd_vma) -1 if it should not be included. */
1819 static bfd_vma
1823 {
1825 }
1827 /* Handle a PowerPC specific section when reading an object file. This
1828 is called when bfd_section_from_shdr finds a section with an unknown
1829 type. */
1831 static bfd_boolean
1836 {
1838 flagword flags;
1853 }
1855 /* Set up any other section flags and such that may be necessary. */
1857 static bfd_boolean
1861 {
1869 }
1871 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1872 need to bump up the number of section headers. */
1874 static int
1877 {
1890 }
1892 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1893 .PPC.EMB.sbss0 a normal section, and not a bss section so
1894 that the linker doesn't crater when trying to make more than
1895 2 sections. */
1898 {
1909 };
1911 /* This is what we want for new plt/got. */
1917 {
1920 /* See if this is one of the special sections. */
1927 {
1931 }
1934 }
1935 \f
1936 /* Very simple linked list structure for recording apuinfo values. */
1938 {
1941 }
1942 apuinfo_list;
1947 static void
1949 {
1951 }
1953 static void
1955 {
1959 {
1963 }
1972 }
1974 static unsigned
1976 {
1981 entry;
1986 }
1990 {
1996 ;
1999 }
2001 static void
2003 {
2007 {
2011 }
2014 }
2019 /* Scan the input BFDs and create a linked list of
2020 the APUinfo values that will need to be emitted. */
2022 static void
2024 {
2029 bfd_size_type output_section_size;
2039 /* Scan the input bfds, looking for apuinfo sections. */
2044 {
2047 {
2050 }
2051 }
2053 /* We need at least one input sections
2054 in order to make merging worthwhile. */
2058 /* Just make sure that the output section exists as well. */
2063 /* Allocate a buffer for the contents of the input sections. */
2071 /* Read in the input sections contents. */
2073 {
2083 {
2086 }
2090 {
2093 }
2095 /* Process the contents of the section. */
2099 /* Verify the contents of the header. Note - we have to
2100 extract the values this way in order to allow for a
2101 host whose endian-ness is different from the target. */
2113 /* Get the number of bytes used for apuinfo entries. */
2118 /* Make sure that we do not run off the end of the section. */
2122 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2126 /* Update the offset. */
2128 }
2132 /* Compute the size of the output section. */
2142 fail:
2147 }
2149 /* Prevent the output section from accumulating the input sections'
2150 contents. We have already stored this in our linked list structure. */
2152 static bfd_boolean
2156 {
2159 }
2161 /* Finally we can generate the output section. */
2163 static void
2165 {
2170 bfd_size_type length;
2185 {
2189 }
2191 /* Create the apuinfo header. */
2200 {
2203 }
2214 }
2215 \f
2216 /* The following functions are specific to the ELF linker, while
2217 functions above are used generally. They appear in this file more
2218 or less in the order in which they are called. eg.
2219 ppc_elf_check_relocs is called early in the link process,
2220 ppc_elf_finish_dynamic_sections is one of the last functions
2221 called. */
2223 /* The PPC linker needs to keep track of the number of relocs that it
2224 decides to copy as dynamic relocs in check_relocs for each symbol.
2225 This is so that it can later discard them if they are found to be
2226 unnecessary. We store the information in a field extending the
2227 regular ELF linker hash table. */
2229 struct ppc_elf_dyn_relocs
2230 {
2233 /* The input section of the reloc. */
2236 /* Total number of relocs copied for the input section. */
2237 bfd_size_type count;
2239 /* Number of pc-relative relocs copied for the input section. */
2240 bfd_size_type pc_count;
2241 };
2243 /* Track PLT entries needed for a given symbol. We might need more
2244 than one glink entry per symbol. */
2245 struct plt_entry
2246 {
2249 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2250 This field stores the offset into .got2 used to initialise the
2251 GOT pointer reg. It will always be at least 32768 (and for
2252 current gcc this is the only offset used). */
2253 bfd_vma addend;
2255 /* The .got2 section. */
2258 /* PLT refcount or offset. */
2259 union
2260 {
2261 bfd_signed_vma refcount;
2262 bfd_vma offset;
2265 /* .glink stub offset. */
2266 bfd_vma glink_offset;
2267 };
2269 /* Of those relocs that might be copied as dynamic relocs, this macro
2270 selects those that must be copied when linking a shared library,
2271 even when the symbol is local. */
2273 #define MUST_BE_DYN_RELOC(RTYPE) \
2274 ((RTYPE) != R_PPC_REL24 \
2275 && (RTYPE) != R_PPC_REL14 \
2276 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2277 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2278 && (RTYPE) != R_PPC_REL32)
2280 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2281 copying dynamic variables from a shared lib into an app's dynbss
2282 section, and instead use a dynamic relocation to point into the
2283 shared lib. */
2284 #define ELIMINATE_COPY_RELOCS 1
2286 /* PPC ELF linker hash entry. */
2288 struct ppc_elf_link_hash_entry
2289 {
2292 /* If this symbol is used in the linker created sections, the processor
2293 specific backend uses this field to map the field into the offset
2294 from the beginning of the section. */
2297 /* Track dynamic relocs copied for this symbol. */
2300 /* Contexts in which symbol is used in the GOT (or TOC).
2301 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2302 corresponding relocs are encountered during check_relocs.
2303 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2304 indicate the corresponding GOT entry type is not needed. */
2313 /* Nonzero if we have seen a small data relocation referring to this
2314 symbol. */
2316 };
2318 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2321 PLT_UNSET,
2322 PLT_OLD,
2323 PLT_NEW,
2324 PLT_VXWORKS
2325 };
2327 /* PPC ELF linker hash table. */
2329 struct ppc_elf_link_hash_table
2330 {
2333 /* Short-cuts to get to dynamic linker sections. */
2346 /* Shortcut to .__tls_get_addr. */
2349 /* TLS local dynamic got entry handling. */
2351 bfd_signed_vma refcount;
2352 bfd_vma offset;
2355 /* Offset of PltResolve function in glink. */
2356 bfd_vma glink_pltresolve;
2358 /* Size of reserved GOT entries. */
2360 /* Non-zero if allocating the header left a gap. */
2363 /* The type of PLT we have chosen to use. */
2366 /* Whether we can use the new PLT layout. */
2369 /* Set if we should emit symbols for stubs. */
2372 /* Small local sym to section mapping cache. */
2375 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2378 /* The .got.plt section (VxWorks only)*/
2381 /* True if the target system is VxWorks. */
2384 /* The size of PLT entries. */
2386 /* The distance between adjacent PLT slots. */
2388 /* The size of the first PLT entry. */
2390 };
2392 /* Get the PPC ELF linker hash table from a link_info structure. */
2394 #define ppc_elf_hash_table(p) \
2395 ((struct ppc_elf_link_hash_table *) (p)->hash)
2397 /* Create an entry in a PPC ELF linker hash table. */
2403 {
2404 /* Allocate the structure if it has not already been allocated by a
2405 subclass. */
2407 {
2412 }
2414 /* Call the allocation method of the superclass. */
2417 {
2421 }
2424 }
2426 /* Create a PPC ELF linker hash table. */
2430 {
2438 ppc_elf_link_hash_newfunc,
2440 {
2443 }
2465 }
2467 /* Create .got and the related sections. */
2469 static bfd_boolean
2471 {
2474 flagword flags;
2485 {
2489 }
2490 else
2491 {
2492 /* The powerpc .got has a blrl instruction in it. Mark it
2493 executable. */
2498 }
2508 }
2510 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2511 to output sections (just like _bfd_elf_create_dynamic_sections has
2512 to create .dynbss and .rela.bss). */
2514 static bfd_boolean
2516 {
2519 flagword flags;
2547 {
2554 }
2567 /* The VxWorks PLT is a loaded section with contents. */
2570 }
2572 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2574 static void
2578 {
2585 {
2587 {
2591 /* Add reloc counts against the indirect sym to the direct sym
2592 list. Merge any entries against the same section. */
2594 {
2599 {
2604 }
2607 }
2609 }
2613 }
2618 /* If called to transfer flags for a weakdef during processing
2619 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2620 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2631 /* If we were called to copy over info for a weak sym, that's all. */
2635 /* Copy over the GOT refcount entries that we may have already seen to
2636 the symbol which just became indirect. */
2640 /* And plt entries. */
2642 {
2644 {
2649 {
2654 {
2658 }
2661 }
2663 }
2667 }
2670 {
2678 }
2679 }
2681 /* Return 1 if target is one of ours. */
2683 static bfd_boolean
2685 {
2693 }
2695 /* Hook called by the linker routine which adds symbols from an object
2696 file. We use it to put .comm items in .sbss, and not .bss. */
2698 static bfd_boolean
2706 {
2711 {
2712 /* Common symbols less than or equal to -G nn bytes are automatically
2713 put into .sbss. */
2718 {
2726 flags);
2729 }
2733 }
2736 }
2737 \f
2738 static bfd_boolean
2741 {
2750 }
2752 /* Create a special linker section. */
2754 static bfd_boolean
2757 flagword flags,
2759 {
2766 /* Record the first bfd that needs the special sections. */
2772 flags);
2779 }
2781 /* Find a linker generated pointer with a given addend and type. */
2784 elf_find_pointer_linker_section
2786 bfd_vma addend,
2788 {
2794 }
2796 /* Allocate a pointer to live in a linker created section. */
2798 static bfd_boolean
2803 {
2807 bfd_size_type amt;
2811 /* Is this a global symbol? */
2813 {
2816 /* Has this symbol already been allocated? If so, our work is done. */
2820 lsect))
2824 }
2825 else
2826 {
2827 /* Allocation of a pointer to a local symbol. */
2830 /* Allocate a table to hold the local symbols if first time. */
2832 {
2843 }
2845 /* Has this symbol already been allocated? If so, our work is done. */
2848 lsect))
2852 }
2854 /* Allocate space for a pointer in the linker section, and allocate
2855 a new pointer record from internal memory. */
2871 #ifdef DEBUG
2876 #endif
2879 }
2881 static bfd_boolean
2886 {
2891 {
2899 }
2905 }
2907 static bfd_boolean
2910 {
2919 {
2929 }
2932 }
2936 {
2945 }
2947 static void
2949 {
2952 abfd,
2955 }
2957 /* Look through the relocs for a section during the first phase, and
2958 allocate space in the global offset table or procedure linkage
2959 table. */
2961 static bfd_boolean
2966 {
2977 /* Don't do anything special with non-loaded, non-alloced sections.
2978 In particular, any relocs in such sections should not affect GOT
2979 and PLT reference counting (ie. we don't allow them to create GOT
2980 or PLT entries), there's no possibility or desire to optimize TLS
2981 relocs, and there's not much point in propagating relocs to shared
2982 libs that the dynamic linker won't relocate. */
2986 #ifdef DEBUG
2989 #endif
2991 /* Initialize howto table if not already done. */
3003 {
3012 else
3013 {
3018 }
3020 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3021 This shows up in particular in an R_PPC_ADDR32 in the eabi
3022 startup code. */
3026 {
3032 }
3036 {
3066 dogottls:
3068 /* Fall thru */
3070 /* GOT16 relocations */
3075 /* This symbol requires a global offset table entry. */
3077 {
3082 }
3084 {
3087 }
3088 else
3089 /* This is a global offset table entry for a local symbol. */
3094 /* Indirect .sdata relocation. */
3097 {
3100 }
3109 {
3112 }
3115 /* Indirect .sdata2 relocation. */
3118 {
3121 }
3130 {
3133 }
3138 {
3141 }
3146 {
3149 }
3154 {
3157 }
3162 {
3165 }
3171 {
3174 }
3182 {
3185 }
3194 {
3197 }
3208 #ifdef DEBUG
3210 #endif
3211 /* This symbol requires a procedure linkage table entry. We
3212 actually build the entry in finish_dynamic_symbol,
3213 because this might be a case of linking PIC code without
3214 linking in any dynamic objects, in which case we don't
3215 need to generate a procedure linkage table after all. */
3218 {
3219 /* It does not make sense to have a procedure linkage
3220 table entry for a local symbol. */
3223 abfd,
3224 sec,
3229 }
3230 else
3231 {
3237 }
3240 /* The following relocations don't need to propagate the
3241 relocation if linking a shared object since they are
3242 section relative. */
3261 /* These are just markers. */
3268 /* These should only appear in dynamic objects. */
3275 /* These aren't handled yet. We'll report an error later. */
3284 /* This refers only to functions defined in the shared library. */
3290 /* This relocation describes the C++ object vtable hierarchy.
3291 Reconstruct it for later use during GC. */
3297 /* This relocation describes which C++ vtable entries are actually
3298 used. Record for later use during GC. */
3304 /* We shouldn't really be seeing these. */
3310 /* Nor these. */
3329 {
3330 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3331 the start of a function, which assembles to a REL32
3332 reference to .got2. If we detect one of these, then
3333 force the old PLT layout because the linker cannot
3334 reliably deduce the GOT pointer value needed for
3335 PLT call stubs. */
3339 r_symndx);
3342 }
3354 {
3358 }
3359 /* fall through */
3372 dodyn1:
3374 {
3375 /* We may need a plt entry if the symbol turns out to be
3376 a function defined in a dynamic object. */
3380 /* We may need a copy reloc too. */
3382 }
3384 dodyn:
3385 /* If we are creating a shared library, and this is a reloc
3386 against a global symbol, or a non PC relative reloc
3387 against a local symbol, then we need to copy the reloc
3388 into the shared library. However, if we are linking with
3389 -Bsymbolic, we do not need to copy a reloc against a
3390 global symbol which is defined in an object we are
3391 including in the link (i.e., DEF_REGULAR is set). At
3392 this point we have not seen all the input files, so it is
3393 possible that DEF_REGULAR is not set now but will be set
3394 later (it is never cleared). In case of a weak definition,
3395 DEF_REGULAR may be cleared later by a strong definition in
3396 a shared library. We account for that possibility below by
3397 storing information in the dyn_relocs field of the hash
3398 table entry. A similar situation occurs when creating
3399 shared libraries and symbol visibility changes render the
3400 symbol local.
3402 If on the other hand, we are creating an executable, we
3403 may need to keep relocations for symbols satisfied by a
3404 dynamic library if we manage to avoid copy relocs for the
3405 symbol. */
3412 || (ELIMINATE_COPY_RELOCS
3417 {
3421 #ifdef DEBUG
3423 "ppc_elf_check_relocs needs to "
3427 #endif
3429 {
3432 name = (bfd_elf_string_from_elf_section
3447 {
3448 flagword flags;
3454 name,
3455 flags);
3460 }
3462 }
3464 /* If this is a global symbol, we count the number of
3465 relocations we need for this symbol. */
3467 {
3469 }
3470 else
3471 {
3472 /* Track dynamic relocs needed for local syms too.
3473 We really need local syms available to do this
3474 easily. Oh well. */
3486 }
3490 {
3499 }
3504 }
3507 }
3508 }
3511 }
3512 \f
3513 /* Merge backend specific data from an object file to the output
3514 object file when linking. */
3516 static bfd_boolean
3518 {
3519 flagword old_flags;
3520 flagword new_flags;
3521 bfd_boolean error;
3527 /* Check if we have the same endianess. */
3534 {
3535 /* First call, no flags set. */
3538 }
3540 /* Compatible flags are ok. */
3542 ;
3544 /* Incompatible flags. */
3545 else
3546 {
3547 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3548 to be linked with either. */
3552 {
3557 }
3560 {
3565 }
3567 /* The output is -mrelocatable-lib iff both the input files are. */
3571 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3572 but each input file is either -mrelocatable or -mrelocatable-lib. */
3578 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3579 any module uses it. */
3585 /* Warn about any other mismatches. */
3587 {
3593 }
3596 {
3599 }
3600 }
3603 }
3604 \f
3605 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3606 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3607 int
3612 {
3614 flagword flags;
3627 {
3631 /* The new PLT is a loaded section. */
3636 /* The new GOT is not executable. */
3640 }
3641 else
3642 {
3643 /* Stop an unused .glink section from affecting .text alignment. */
3647 }
3649 }
3650 \f
3651 /* Return the section that should be marked against GC for a given
3652 relocation. */
3660 {
3663 {
3667 }
3670 }
3672 /* Update the got, plt and dynamic reloc reference counts for the
3673 section being removed. */
3675 static bfd_boolean
3680 {
3701 {
3708 {
3720 {
3721 /* Everything must go for SEC. */
3724 }
3725 }
3729 {
3735 /* Fall thru */
3754 {
3757 }
3759 {
3762 }
3772 /* Fall thru */
3795 {
3800 }
3805 }
3806 }
3808 }
3809 \f
3810 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3812 asection *
3814 {
3821 {
3824 }
3829 }
3831 /* Run through all the TLS relocs looking for optimization
3832 opportunities. */
3834 bfd_boolean
3837 {
3847 {
3853 {
3857 /* Read the relocations. */
3866 {
3872 bfd_boolean is_local;
3876 {
3884 }
3893 {
3898 /* These relocs should never be against a symbol
3899 defined in a shared lib. Leave them alone if
3900 that turns out to be the case. */
3906 /* LD -> LE */
3917 /* GD -> LE */
3919 else
3920 /* GD -> IE */
3932 {
3933 /* IE -> LE */
3937 }
3938 else
3948 {
3952 }
3959 }
3962 {
3964 {
3965 /* We managed to get rid of a got entry. */
3968 }
3970 }
3971 else
3972 {
3978 {
3985 {
3989 }
3990 }
3996 {
3997 /* We managed to get rid of a got entry. */
4000 }
4003 }
4007 }
4011 }
4015 {
4018 else
4020 }
4021 }
4023 }
4024 \f
4025 /* Adjust a symbol defined by a dynamic object and referenced by a
4026 regular object. The current definition is in some section of the
4027 dynamic object, but we're not including those sections. We have to
4028 change the definition to something the rest of the link can
4029 understand. */
4031 static bfd_boolean
4034 {
4039 #ifdef DEBUG
4042 #endif
4044 /* Make sure we know what is going on here. */
4053 /* Deal with function syms. */
4056 {
4057 /* Clear procedure linkage table information for any symbol that
4058 won't need a .plt entry. */
4067 {
4068 /* A PLT entry is not required/allowed when:
4070 1. We are not using ld.so; because then the PLT entry
4071 can't be set up, so we can't use one. In this case,
4072 ppc_elf_adjust_dynamic_symbol won't even be called.
4074 2. GC has rendered the entry unused.
4076 3. We know for certain that a call to this symbol
4077 will go to this object, or will remain undefined. */
4080 }
4082 }
4083 else
4086 /* If this is a weak symbol, and there is a real definition, the
4087 processor independent code will have arranged for us to see the
4088 real definition first, and we can just use the same value. */
4090 {
4098 }
4100 /* This is a reference to a symbol defined by a dynamic object which
4101 is not a function. */
4103 /* If we are creating a shared library, we must presume that the
4104 only references to the symbol are via the global offset table.
4105 For such cases we need not do anything here; the relocations will
4106 be handled correctly by relocate_section. */
4110 /* If there are no references to this symbol that do not use the
4111 GOT, we don't need to generate a copy reloc. */
4115 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4116 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4117 do this if there are any small data relocations. */
4120 {
4123 {
4127 }
4130 {
4133 }
4134 }
4137 {
4141 }
4143 /* We must allocate the symbol in our .dynbss section, which will
4144 become part of the .bss section of the executable. There will be
4145 an entry for this symbol in the .dynsym section. The dynamic
4146 object will contain position independent code, so all references
4147 from the dynamic object to this symbol will go through the global
4148 offset table. The dynamic linker will use the .dynsym entry to
4149 determine the address it must put in the global offset table, so
4150 both the dynamic object and the regular object will refer to the
4151 same memory location for the variable.
4153 Of course, if the symbol is referenced using SDAREL relocs, we
4154 must instead allocate it in .sbss. */
4158 else
4162 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4163 copy the initial value out of the dynamic object and into the
4164 runtime process image. We need to remember the offset into the
4165 .rela.bss section we are going to use. */
4167 {
4172 else
4177 }
4179 /* We need to figure out the alignment required for this symbol. I
4180 have no idea how ELF linkers handle this. */
4185 /* Apply the required alignment. */
4188 {
4191 }
4193 /* Define the symbol as being at this point in the section. */
4197 /* Increment the section size to make room for the symbol. */
4201 }
4202 \f
4203 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4204 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4205 specifying the addend on the plt relocation. For -fpic code, the sym
4206 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4207 xxxxxxxx.got2.plt_pic32.<callee>. */
4209 static bfd_boolean
4213 {
4222 else
4242 {
4251 }
4253 }
4255 /* Allocate NEED contiguous space in .got, and return the offset.
4256 Handles allocation of the got header when crossing 32k. */
4258 static bfd_vma
4260 {
4261 bfd_vma where;
4265 {
4268 }
4269 else
4270 {
4273 {
4276 }
4277 else
4278 {
4281 {
4284 }
4287 }
4288 }
4290 }
4292 /* Allocate space in associated reloc sections for dynamic relocs. */
4294 static bfd_boolean
4296 {
4306 /* When warning symbols are created, they **replace** the "real"
4307 entry in the hash table, thus we never get to see the real
4308 symbol in a hash traversal. So look at it now. */
4313 {
4320 {
4321 /* Make sure this symbol is output as a dynamic symbol. */
4324 {
4327 }
4331 {
4335 {
4337 {
4340 }
4345 {
4348 }
4352 {
4355 }
4361 }
4362 else
4363 {
4365 {
4366 /* If this is the first .plt entry, make room
4367 for the special first entry. */
4371 /* The PowerPC PLT is actually composed of two
4372 parts, the first part is 2 words (for a load
4373 and a jump), and then there is a remaining
4374 word available at the end. */
4381 /* If this symbol is not defined in a regular
4382 file, and we are not generating a shared
4383 library, then set the symbol to this location
4384 in the .plt. This is required to make
4385 function pointers compare as equal between
4386 the normal executable and the shared library. */
4389 {
4392 }
4394 /* Make room for this entry. */
4396 /* After the 8192nd entry, room for two entries
4397 is allocated. */
4403 }
4405 }
4407 /* We also need to make an entry in the .rela.plt section. */
4409 {
4413 {
4414 /* Allocate space for the unloaded relocations. */
4416 {
4419 {
4423 }
4428 }
4430 /* Every PLT entry has an associated GOT entry in
4431 .got.plt. */
4433 }
4435 }
4436 }
4437 else
4441 {
4444 }
4445 }
4446 }
4447 else
4448 {
4451 }
4455 {
4456 /* Make sure this symbol is output as a dynamic symbol. */
4459 {
4462 }
4466 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4468 else
4469 {
4470 bfd_boolean dyn;
4473 {
4482 }
4483 else
4491 {
4492 /* All the entries we allocated need relocs.
4493 Except LD only needs one. */
4497 }
4498 }
4499 }
4500 else
4506 /* In the shared -Bsymbolic case, discard space allocated for
4507 dynamic pc-relative relocs against symbols which turn out to be
4508 defined in regular objects. For the normal shared case, discard
4509 space for relocs that have become local due to symbol visibility
4510 changes. */
4513 {
4514 /* Relocs that use pc_count are those that appear on a call insn,
4515 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4516 generated via assembly. We want calls to protected symbols to
4517 resolve directly to the function rather than going via the plt.
4518 If people want function pointer comparisons to work as expected
4519 then they should avoid writing weird assembly. */
4521 {
4525 {
4530 else
4532 }
4533 }
4535 /* Also discard relocs on undefined weak syms with non-default
4536 visibility. */
4539 {
4543 /* Make sure undefined weak symbols are output as a dynamic
4544 symbol in PIEs. */
4547 {
4550 }
4551 }
4552 }
4554 {
4555 /* For the non-shared case, discard space for relocs against
4556 symbols which turn out to need copy relocs or are not
4557 dynamic. */
4562 {
4563 /* Make sure this symbol is output as a dynamic symbol.
4564 Undefined weak syms won't yet be marked as dynamic. */
4567 {
4570 }
4572 /* If that succeeded, we know we'll be keeping all the
4573 relocs. */
4576 }
4580 keep: ;
4581 }
4583 /* Finally, allocate space. */
4585 {
4588 }
4591 }
4593 /* Find any dynamic relocs that apply to read-only sections. */
4595 static bfd_boolean
4597 {
4607 {
4613 {
4616 /* Not an error, just cut short the traversal. */
4618 }
4619 }
4621 }
4623 /* Set the sizes of the dynamic sections. */
4625 static bfd_boolean
4628 {
4631 bfd_boolean relocs;
4634 #ifdef DEBUG
4636 #endif
4642 {
4643 /* Set the contents of the .interp section to the interpreter. */
4645 {
4650 }
4651 }
4658 /* Set up .got offsets for local syms, and space for local dynamic
4659 relocs. */
4661 {
4665 bfd_size_type locsymcount;
4672 {
4679 {
4682 {
4683 /* Input section has been discarded, either because
4684 it is a copy of a linkonce section or due to
4685 linker script /DISCARD/, so we'll be discarding
4686 the relocs too. */
4687 }
4689 {
4696 }
4697 }
4698 }
4710 {
4712 {
4713 /* If just an LD reloc, we'll just use
4714 htab->tlsld_got.offset. */
4717 }
4718 else
4719 {
4722 {
4729 }
4730 else
4736 }
4737 }
4738 else
4740 }
4743 {
4747 }
4748 else
4751 /* Allocate space for global sym dynamic relocs. */
4755 {
4758 /* If we haven't allocated the header, do so now. When we get here,
4759 for old plt/got the got size will be 0 to 32764 (not allocated),
4760 or 32780 to 65536 (header allocated). For new plt/got, the
4761 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4763 {
4768 }
4771 }
4774 {
4776 /* Space for the branch table. */
4778 /* Pad out to align the start of PLTresolve. */
4783 {
4790 {
4799 }
4805 {
4814 }
4815 }
4816 }
4818 /* We've now determined the sizes of the various dynamic sections.
4819 Allocate memory for them. */
4822 {
4835 {
4836 /* We'd like to strip these sections if they aren't needed, but if
4837 we've exported dynamic symbols from them we must leave them.
4838 It's too late to tell BFD to get rid of the symbols. */
4841 /* Strip this section if we don't need it; see the
4842 comment below. */
4843 }
4846 {
4847 /* Strip these too. */
4848 }
4850 {
4852 {
4853 /* Remember whether there are any relocation sections. */
4856 /* We use the reloc_count field as a counter if we need
4857 to copy relocs into the output file. */
4859 }
4860 }
4861 else
4862 {
4863 /* It's not one of our sections, so don't allocate space. */
4865 }
4868 {
4869 /* If we don't need this section, strip it from the
4870 output file. This is mostly to handle .rela.bss and
4871 .rela.plt. We must create both sections in
4872 create_dynamic_sections, because they must be created
4873 before the linker maps input sections to output
4874 sections. The linker does that before
4875 adjust_dynamic_symbol is called, and it is that
4876 function which decides whether anything needs to go
4877 into these sections. */
4880 }
4885 /* Allocate memory for the section contents. */
4889 }
4892 {
4893 /* Add some entries to the .dynamic section. We fill in the
4894 values later, in ppc_elf_finish_dynamic_sections, but we
4895 must add the entries now so that we get the correct size for
4896 the .dynamic section. The DT_DEBUG entry is filled in by the
4897 dynamic linker and used by the debugger. */
4898 #define add_dynamic_entry(TAG, VAL) \
4899 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4902 {
4905 }
4908 {
4914 }
4917 {
4920 }
4923 {
4928 }
4930 /* If any dynamic relocs apply to a read-only section, then we
4931 need a DT_TEXTREL entry. */
4934 info);
4937 {
4940 }
4941 }
4942 #undef add_dynamic_entry
4945 }
4946 \f
4947 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4950 {
4959 };
4962 {
4967 };
4969 static bfd_boolean
4974 {
4975 struct one_fixup
4976 {
4979 bfd_vma toff;
4980 bfd_vma trampoff;
4981 };
4989 bfd_boolean changed;
4991 bfd_size_type trampoff;
4996 /* Nothing to do if there are no relocations, and no need to do
4997 anything with non-alloc sections. */
5004 /* Space for a branch around any trampolines. */
5009 /* Get a copy of the native relocations. */
5020 {
5032 {
5047 }
5049 /* Get the value of the symbol referred to by the reloc. */
5051 {
5052 /* A local symbol. */
5055 /* Read this BFD's local symbols. */
5057 {
5065 }
5073 else
5078 }
5079 else
5080 {
5081 /* Global symbol handling. */
5096 {
5100 {
5102 {
5105 }
5106 else
5107 {
5110 }
5111 }
5112 }
5114 ;
5117 {
5120 }
5121 else
5125 }
5127 /* If the branch and target are in the same section, you have
5128 no hope of adding stubs. We'll error out later should the
5129 branch overflow. */
5133 /* There probably isn't any reason to handle symbols in
5134 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5135 attribute for a code section, and we are only looking at
5136 branches. However, implement it correctly here as a
5137 reference for other target relax_section functions. */
5139 {
5140 /* At this stage in linking, no SEC_MERGE symbol has been
5141 adjusted, so all references to such symbols need to be
5142 passed through _bfd_merged_section_offset. (Later, in
5143 relocate_section, all SEC_MERGE symbols *except* for
5144 section symbols have been adjusted.)
5146 gas may reduce relocations against symbols in SEC_MERGE
5147 sections to a relocation against the section symbol when
5148 the original addend was zero. When the reloc is against
5149 a section symbol we should include the addend in the
5150 offset passed to _bfd_merged_section_offset, since the
5151 location of interest is the original symbol. On the
5152 other hand, an access to "sym+addend" where "sym" is not
5153 a section symbol should not include the addend; Such an
5154 access is presumed to be an offset from "sym"; The
5155 location of interest is just "sym". */
5161 toff);
5165 }
5166 /* PLTREL24 addends are special. */
5170 /* Attempted -shared link of non-pic code loses. */
5179 /* If the branch is in range, no need to do anything. */
5183 /* Look for an existing fixup to this address. */
5189 {
5195 /* Oh dear, we can't reach a trampoline. Don't try to add
5196 one. We'll report an error later. */
5200 {
5204 }
5205 else
5206 {
5210 }
5219 /* Hijack the old relocation. Since we need two
5220 relocations for this use a "composite" reloc. */
5222 stub_rtype);
5225 /* Record the fixup so we don't do it again this section. */
5234 }
5235 else
5236 {
5241 /* Nop out the reloc, since we're finalizing things here. */
5243 }
5245 /* Get the section contents. */
5247 {
5248 /* Get cached copy if it exists. */
5251 else
5252 {
5253 /* Go get them off disk. */
5256 }
5257 }
5259 /* Fix up the existing branch to hit the trampoline. */
5262 {
5280 }
5281 }
5283 /* Write out the trampolines. */
5286 {
5289 bfd_vma val;
5292 do
5293 {
5297 }
5305 /* Branch around the trampolines. */
5313 {
5316 }
5317 else
5318 {
5321 }
5325 {
5327 i++;
5331 }
5333 }
5337 {
5340 else
5341 {
5342 /* Cache the symbols for elf_link_input_bfd. */
5344 }
5345 }
5349 {
5352 else
5353 {
5354 /* Cache the section contents for elf_link_input_bfd. */
5356 }
5357 }
5360 {
5363 else
5365 }
5370 error_return:
5380 }
5381 \f
5382 /* What to do when ld finds relocations against symbols defined in
5383 discarded sections. */
5385 static unsigned int
5387 {
5395 }
5396 \f
5397 /* Fill in the address for a pointer generated in a linker section. */
5399 static bfd_vma
5403 bfd_vma relocation,
5405 {
5411 {
5412 /* Handle global symbol. */
5418 }
5419 else
5420 {
5421 /* Handle local symbol. */
5426 }
5430 lsect);
5433 /* Offset will always be a multiple of four, so use the bottom bit
5434 as a "written" flag. */
5436 {
5441 }
5447 #ifdef DEBUG
5451 #endif
5453 /* Subtract out the addend, because it will get added back in by the normal
5454 processing. */
5456 }
5458 /* The RELOCATE_SECTION function is called by the ELF backend linker
5459 to handle the relocations for a section.
5461 The relocs are always passed as Rela structures; if the section
5462 actually uses Rel structures, the r_addend field will always be
5463 zero.
5465 This function is responsible for adjust the section contents as
5466 necessary, and (if using Rela relocs and generating a
5467 relocatable output file) adjusting the reloc addend as
5468 necessary.
5470 This function does not have to worry about setting the reloc
5471 address or the reloc symbol index.
5473 LOCAL_SYMS is a pointer to the swapped in local symbols.
5475 LOCAL_SECTIONS is an array giving the section in the input file
5476 corresponding to the st_shndx field of each local symbol.
5478 The global hash table entry for the global symbols can be found
5479 via elf_sym_hashes (input_bfd).
5481 When generating relocatable output, this function must handle
5482 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5483 going to be the section symbol corresponding to the output
5484 section, which means that the addend must be adjusted
5485 accordingly. */
5487 static bfd_boolean
5496 {
5502 Elf_Internal_Rela outrel;
5509 #ifdef DEBUG
5515 #endif
5520 {
5527 {
5533 {
5534 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5535 addend specifies the GOT pointer offset within .got2. */
5537 }
5538 }
5540 }
5542 /* Initialize howto table if not already done. */
5553 {
5555 bfd_vma addend;
5556 bfd_reloc_status_type r;
5563 bfd_vma relocation;
5565 bfd_boolean unresolved_reloc;
5566 bfd_boolean warned;
5578 {
5584 }
5585 else
5586 {
5593 }
5595 /* TLS optimizations. Replace instruction sequences and relocs
5596 based on information we collected in tls_optimize. We edit
5597 RELOCS so that --emit-relocs will output something sensible
5598 for the final instruction stream. */
5602 {
5606 {
5610 }
5611 }
5613 /* Ensure reloc mapping code below stays sane. */
5624 {
5632 {
5633 bfd_vma insn;
5640 }
5646 {
5655 else
5658 /* add -> addi. */
5664 /* load and store indexed -> dform. */
5668 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5673 /* lwax -> lwa. */
5675 else
5682 /* Was PPC_TLS which sits on insn boundary, now
5683 PPC_TPREL16_LO which is at low-order half-word. */
5685 }
5698 {
5699 tls_gdld_hi:
5703 else
5704 {
5708 }
5710 }
5723 {
5724 tls_get_addr_check:
5726 {
5731 bfd_vma offset;
5733 /* The next instruction should be a call to
5734 __tls_get_addr. Peek at the reloc to be sure. */
5752 /* OK, it checks out. Replace the call. */
5757 {
5758 /* IE */
5767 }
5768 else
5769 {
5770 /* LE */
5774 {
5775 /* Was an LD reloc. */
5778 }
5782 R_PPC_TPREL16_LO);
5785 }
5789 {
5790 /* We changed the symbol on an LD reloc. Start over
5791 in order to get h, sym, sec etc. right. */
5792 rel--;
5794 }
5795 }
5796 }
5798 }
5800 /* Handle other relocations that tweak non-addend part of insn. */
5803 {
5807 /* Branch taken prediction relocations. */
5811 /* Fall thru */
5813 /* Branch not taken prediction relocations. */
5824 /* Invert 'y' bit if not the default. */
5830 }
5838 {
5855 /* GOT16 relocations. Like an ADDR16 using the symbol's
5856 address in the GOT as relocation value instead of the
5857 symbol's value itself. Also, create a GOT entry for the
5858 symbol and put the symbol value there. */
5891 dogot:
5892 {
5893 /* Relocation is to the entry for this symbol in the global
5894 offset table. */
5895 bfd_vma off;
5908 {
5909 bfd_boolean dyn;
5914 /* This is actually a static link, or it is a
5915 -Bsymbolic link and the symbol is defined
5916 locally, or the symbol was forced to be local
5917 because of a version file. */
5918 ;
5919 else
5920 {
5923 }
5925 }
5926 else
5927 {
5931 }
5933 /* The offset must always be a multiple of 4. We use the
5934 least significant bit to record whether we have already
5935 processed this entry. */
5939 else
5940 {
5951 /* We might have multiple got entries for this sym.
5952 Initialize them all. */
5953 do
5954 {
5958 {
5961 }
5963 {
5966 }
5968 {
5971 }
5973 {
5976 }
5978 /* Generate relocs for the dynamic linker. */
5983 {
5989 {
5992 {
5999 outrel.r_info
6001 }
6002 }
6009 else
6012 {
6016 }
6021 }
6023 /* Init the .got section contents if we're not
6024 emitting a reloc. */
6025 else
6026 {
6032 {
6038 {
6042 }
6043 }
6046 }
6051 }
6056 }
6062 {
6064 {
6070 {
6074 {
6077 }
6078 }
6079 }
6080 }
6085 /* Addends on got relocations don't make much sense.
6086 x+off@got is actually x@got+off, and since the got is
6087 generated by a hash table traversal, the value in the
6088 got at entry m+n bears little relation to the entry m. */
6092 input_bfd,
6093 input_section,
6096 sym_name);
6097 }
6100 /* Relocations that need no special processing. */
6102 /* It makes no sense to point a local relocation
6103 at a symbol not in this object. */
6105 {
6108 input_bfd,
6109 input_section,
6111 TRUE))
6114 }
6124 /* Relocations that may need to be propagated if this is a shared
6125 object. */
6131 /* The TPREL16 relocs shouldn't really be used in shared
6132 libs as they will result in DT_TEXTREL being set, but
6133 support them anyway. */
6160 /* If these relocations are not to a named symbol, they can be
6161 handled right here, no need to bother the dynamic linker. */
6165 /* fall through */
6167 /* Relocations that always need to be propagated if this is a shared
6168 object. */
6180 /* r_symndx will be zero only for relocs against symbols
6181 from removed linkonce sections, or sections discarded by
6182 a linker script. */
6183 dodyn:
6185 {
6188 }
6189 /* Fall thru. */
6193 /* Fall thru. */
6201 || (ELIMINATE_COPY_RELOCS
6208 {
6211 #ifdef DEBUG
6216 #endif
6218 /* When generating a shared object, these relocations
6219 are copied into the output file to be resolved at run
6220 time. */
6222 {
6225 name = (bfd_elf_string_from_elf_section
6234 input_section),
6239 }
6255 {
6259 }
6260 else
6261 {
6266 else
6267 {
6273 {
6276 }
6277 else
6278 {
6281 /* We are turning this relocation into one
6282 against a section symbol. It would be
6283 proper to subtract the symbol's value,
6284 osec->vma, from the emitted reloc addend,
6285 but ld.so expects buggy relocs. */
6289 {
6292 }
6294 #ifdef DEBUG
6299 #endif
6300 }
6303 }
6304 }
6313 /* This reloc will be computed at runtime. We clear the memory
6314 so that it contains predictable value. */
6318 {
6322 }
6323 }
6328 {
6335 else
6340 }
6343 /* Fall thru */
6349 /* Fall thru */
6352 relax32:
6353 {
6360 /* We're clearing the bits for R_PPC_ADDR16_HA
6361 and R_PPC_ADDR16_LO here. */
6365 /* t0 is HA, t1 is LO */
6372 }
6375 /* Indirect .sdata relocation. */
6378 relocation
6383 /* Indirect .sdata2 relocation. */
6386 relocation
6391 /* Handle the TOC16 reloc. We want to use the offset within the .got
6392 section, not the actual VMA. This is appropriate when generating
6393 an embedded ELF object, for which the .got section acts like the
6394 AIX .toc section. */
6405 /* Relocation is to the entry for this symbol in the
6406 procedure linkage table. */
6407 {
6413 {
6414 /* We didn't make a PLT entry for this symbol. This
6415 happens when statically linking PIC code, or when
6416 using -Bsymbolic. */
6418 }
6425 else
6429 }
6432 /* Relocate against _SDA_BASE_. */
6434 {
6444 {
6448 input_bfd,
6449 sym_name,
6451 name);
6452 }
6457 }
6460 /* Relocate against _SDA2_BASE_. */
6462 {
6470 {
6474 input_bfd,
6475 sym_name,
6477 name);
6482 }
6487 }
6490 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6493 {
6504 {
6510 }
6514 {
6520 }
6524 {
6526 }
6528 else
6529 {
6533 input_bfd,
6534 sym_name,
6536 name);
6541 }
6548 }
6549 }
6552 /* Relocate against the beginning of the section. */
6561 /* Negative relocations. */
6587 input_bfd,
6589 sym_name);
6594 }
6596 /* Do any further special processing. */
6598 {
6609 /* It's just possible that this symbol is a weak symbol
6610 that's not actually defined anywhere. In that case,
6611 'sec' would be NULL, and we should leave the symbol
6612 alone (it will be set to zero elsewhere in the link). */
6615 /* Fall thru */
6623 /* Add 0x10000 if sign bit in 0:15 is set.
6624 Bits 0:15 are not used. */
6627 }
6629 #ifdef DEBUG
6634 sym_name,
6635 r_symndx,
6638 #endif
6643 {
6646 input_bfd,
6647 input_section,
6650 sym_name);
6652 }
6655 input_bfd,
6656 input_section,
6657 contents,
6659 relocation,
6660 addend);
6663 {
6665 {
6671 {
6672 /* Assume this is a call protected by other code that
6673 detect the symbol is undefined. If this is the case,
6674 we can safely ignore the overflow. If not, the
6675 program is hosed anyway, and a little warning isn't
6676 going to help. */
6679 }
6683 sym_name,
6686 input_bfd,
6687 input_section,
6690 }
6691 else
6692 {
6698 }
6699 }
6700 }
6702 #ifdef DEBUG
6704 #endif
6707 }
6708 \f
6709 #define PPC_LO(v) ((v) & 0xffff)
6710 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6711 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6713 /* Finish up dynamic symbol handling. We set the contents of various
6714 dynamic sections here. */
6716 static bfd_boolean
6721 {
6724 bfd_boolean doneone;
6726 #ifdef DEBUG
6729 #endif
6737 {
6739 {
6740 Elf_Internal_Rela rela;
6742 bfd_vma reloc_index;
6746 else
6747 {
6753 }
6755 /* This symbol has an entry in the procedure linkage table.
6756 Set it up. */
6758 {
6759 bfd_vma got_offset;
6762 /* The first three entries in .got.plt are reserved. */
6765 /* Use the right PLT. */
6769 /* Fill in the .plt on VxWorks. */
6771 {
6781 }
6782 else
6783 {
6784 bfd_vma got_loc
6785 = (got_offset
6798 }
6805 /* This instruction is an immediate load. The value loaded is
6806 the byte offset of the R_PPC_JMP_SLOT relocation from the
6807 start of the .rela.plt section. The value is stored in the
6808 low-order 16 bits of the load instruction. */
6809 /* NOTE: It appears that this is now an index rather than a
6810 prescaled offset. */
6814 /* This instruction is a PC-relative branch whose target is
6815 the start of the PLT section. The address of this branch
6816 instruction is 20 bytes beyond the start of this PLT entry.
6817 The address is encoded in bits 6-29, inclusive. The value
6818 stored is right-shifted by two bits, permitting a 26-bit
6819 offset. */
6829 /* Fill in the GOT entry corresponding to this PLT slot with
6830 the address immediately after the the "bctr" instruction
6831 in this PLT entry. */
6838 {
6839 /* Fill in a couple of entries in .rela.plt.unloaded. */
6845 /* Provide the @ha relocation for the first instruction. */
6850 R_PPC_ADDR16_HA);
6855 /* Provide the @l relocation for the second instruction. */
6860 R_PPC_ADDR16_LO);
6865 /* Provide a relocation for the GOT entry corresponding to this
6866 PLT slot. Point it at the middle of the .plt entry. */
6871 R_PPC_ADDR32);
6874 }
6876 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6877 In particular, the offset for the relocation is not the
6878 address of the PLT entry for this function, as specified
6879 by the ABI. Instead, the offset is set to the address of
6880 the GOT slot for this function. See EABI 4.4.4.1. */
6885 }
6886 else
6887 {
6892 {
6893 /* We don't need to fill in the .plt. The ppc dynamic
6894 linker will fill it in. */
6895 }
6896 else
6897 {
6903 }
6904 }
6906 /* Fill in the entry in the .rela.plt section. */
6915 {
6916 /* Mark the symbol as undefined, rather than as defined in
6917 the .plt section. Leave the value alone. */
6919 /* If the symbol is weak, we do need to clear the value.
6920 Otherwise, the PLT entry would provide a definition for
6921 the symbol even if the symbol wasn't defined anywhere,
6922 and so the symbol would never be NULL. */
6925 }
6927 }
6930 {
6931 bfd_vma plt;
6940 {
6955 {
6964 }
6965 else
6966 {
6975 }
6976 }
6977 else
6978 {
6988 /* We only need one non-PIC glink stub. */
6990 }
6991 }
6992 else
6994 }
6997 {
6999 Elf_Internal_Rela rela;
7002 /* This symbols needs a copy reloc. Set it up. */
7004 #ifdef DEBUG
7006 #endif
7012 else
7023 }
7025 #ifdef DEBUG
7027 #endif
7029 /* Mark some specially defined symbols as absolute. */
7038 }
7039 \f
7040 static enum elf_reloc_type_class
7042 {
7044 {
7055 }
7056 }
7057 \f
7058 /* Finish up the dynamic sections. */
7060 static bfd_boolean
7063 {
7067 bfd_vma got;
7070 #ifdef DEBUG
7072 #endif
7079 else
7089 {
7097 {
7098 Elf_Internal_Dyn dyn;
7104 {
7108 else
7128 {
7132 }
7137 }
7140 }
7141 }
7143 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7144 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7146 {
7148 bfd_vma val;
7160 }
7162 /* Fill in the first entry in the VxWorks procedure linkage table. */
7164 {
7165 /* Use the right PLT. */
7171 {
7172 bfd_vma got_value =
7182 }
7183 else
7184 {
7187 }
7196 {
7197 Elf_Internal_Rela rela;
7202 /* Output the @ha relocation for the first instruction. */
7211 /* Output the @l relocation for the second instruction. */
7220 /* Fix up the remaining relocations. They may have the wrong
7221 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7222 in which symbols were output. */
7224 {
7225 Elf_Internal_Rela rel;
7241 }
7242 }
7243 }
7246 {
7249 bfd_vma res0;
7252 /*
7253 * PIC glink code is the following:
7254 *
7255 * # ith PLT code stub.
7256 * addis 11,30,(plt+(i-1)*4-got)@ha
7257 * lwz 11,(plt+(i-1)*4-got)@l(11)
7258 * mtctr 11
7259 * bctr
7260 *
7261 * # A table of branches, one for each plt entry.
7262 * # The idea is that the plt call stub loads ctr (and r11) with these
7263 * # addresses, so (r11 - res_0) gives the plt index * 4.
7264 * res_0: b PLTresolve
7265 * res_1: b PLTresolve
7266 * .
7267 * # Some number of entries towards the end can be nops
7268 * res_n_m3: nop
7269 * res_n_m2: nop
7270 * res_n_m1:
7271 *
7272 * PLTresolve:
7273 * addis 11,11,(1f-res_0)@ha
7274 * mflr 0
7275 * bcl 20,31,1f
7276 * 1: addi 11,11,(1b-res_0)@l
7277 * mflr 12
7278 * mtlr 0
7279 * sub 11,11,12 # r11 = index * 4
7280 * addis 12,12,(got+4-1b)@ha
7281 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7282 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7283 * mtctr 0
7284 * add 0,11,11
7285 * add 11,0,11 # r11 = index * 12 = reloc offset.
7286 * bctr
7287 */
7289 {
7290 ADDIS_11_11,
7291 MFLR_0,
7292 BCL_20_31,
7293 ADDI_11_11,
7294 MFLR_12,
7295 MTLR_0,
7296 SUB_11_11_12,
7297 ADDIS_12_12,
7298 LWZ_0_12,
7299 LWZ_12_12,
7300 MTCTR_0,
7301 ADD_0_11_11,
7302 ADD_11_0_11,
7303 BCTR,
7304 NOP,
7305 NOP
7306 };
7309 {
7310 LIS_12,
7311 ADDIS_11_11,
7312 LWZ_0_12,
7313 ADDI_11_11,
7314 MTCTR_0,
7315 ADD_0_11_11,
7316 LWZ_12_12,
7317 ADD_11_0_11,
7318 BCTR,
7319 NOP,
7320 NOP,
7321 NOP,
7322 NOP,
7323 NOP,
7324 NOP,
7325 NOP
7326 };
7333 /* Build the branch table, one for each plt entry (less one),
7334 and perhaps some padding. */
7340 {
7343 }
7345 {
7348 }
7354 /* Last comes the PLTresolve stub. */
7356 {
7357 bfd_vma bcl;
7360 {
7363 }
7377 {
7382 }
7383 else
7384 {
7389 }
7390 }
7391 else
7392 {
7394 {
7397 }
7407 {
7412 }
7413 else
7414 {
7419 }
7420 }
7421 }
7424 }
7425 \f
7426 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7428 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7430 #define ELF_ARCH bfd_arch_powerpc
7431 #define ELF_MACHINE_CODE EM_PPC
7432 #ifdef __QNXTARGET__
7433 #define ELF_MAXPAGESIZE 0x1000
7434 #else
7435 #define ELF_MAXPAGESIZE 0x10000
7436 #endif
7437 #define ELF_MINPAGESIZE 0x1000
7438 #define ELF_COMMONPAGESIZE 0x1000
7439 #define elf_info_to_howto ppc_elf_info_to_howto
7441 #ifdef EM_CYGNUS_POWERPC
7442 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7443 #endif
7445 #ifdef EM_PPC_OLD
7446 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7447 #endif
7449 #define elf_backend_plt_not_loaded 1
7450 #define elf_backend_can_gc_sections 1
7451 #define elf_backend_can_refcount 1
7452 #define elf_backend_rela_normal 1
7454 #define bfd_elf32_mkobject ppc_elf_mkobject
7455 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7456 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7457 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7458 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7459 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7461 #define elf_backend_object_p ppc_elf_object_p
7462 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7463 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7464 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7465 #define elf_backend_relocate_section ppc_elf_relocate_section
7466 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7467 #define elf_backend_check_relocs ppc_elf_check_relocs
7468 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7469 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7470 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7471 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7472 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7473 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7474 #define elf_backend_fake_sections ppc_elf_fake_sections
7475 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7476 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7477 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7478 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7479 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7480 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7481 #define elf_backend_write_section ppc_elf_write_section
7482 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7483 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7484 #define elf_backend_action_discarded ppc_elf_action_discarded
7485 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7489 /* VxWorks Target */
7491 #undef TARGET_LITTLE_SYM
7492 #undef TARGET_LITTLE_NAME
7494 #undef TARGET_BIG_SYM
7495 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7496 #undef TARGET_BIG_NAME
7499 /* VxWorks uses the elf default section flags for .plt. */
7502 {
7510 }
7512 /* Like ppc_elf_link_hash_table_create, but overrides
7513 appropriately for VxWorks. */
7516 {
7521 {
7529 }
7531 }
7533 /* Tweak magic VxWorks symbols as they are loaded. */
7534 static bfd_boolean
7542 {
7544 valp))
7548 }
7550 static void
7552 {
7555 }
7557 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7558 define it. */
7559 #undef elf_backend_want_plt_sym
7560 #define elf_backend_want_plt_sym 1
7561 #undef elf_backend_want_got_plt
7562 #define elf_backend_want_got_plt 1
7563 #undef elf_backend_got_symbol_offset
7564 #define elf_backend_got_symbol_offset 0
7565 #undef elf_backend_plt_not_loaded
7566 #define elf_backend_plt_not_loaded 0
7567 #undef elf_backend_plt_readonly
7568 #define elf_backend_plt_readonly 1
7569 #undef elf_backend_got_header_size
7570 #define elf_backend_got_header_size 12
7572 #undef bfd_elf32_bfd_link_hash_table_create
7573 #define bfd_elf32_bfd_link_hash_table_create \
7574 ppc_elf_vxworks_link_hash_table_create
7575 #undef elf_backend_add_symbol_hook
7576 #define elf_backend_add_symbol_hook \
7577 ppc_elf_vxworks_add_symbol_hook
7578 #undef elf_backend_link_output_symbol_hook
7579 #define elf_backend_link_output_symbol_hook \
7580 elf_vxworks_link_output_symbol_hook
7581 #undef elf_backend_final_write_processing
7582 #define elf_backend_final_write_processing \
7583 ppc_elf_vxworks_final_write_processing
7584 #undef elf_backend_get_sec_type_attr
7585 #define elf_backend_get_sec_type_attr \
7586 ppc_elf_vxworks_get_sec_type_attr
7587 #undef elf_backend_emit_relocs
7588 #define elf_backend_emit_relocs \
7589 elf_vxworks_emit_relocs
7591 #undef elf32_bed
7592 #define elf32_bed ppc_elf_vxworks_bed