| blob | f0a780a7aa14cfe8c642a85193362c284a6c5074 |
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. */
28 #include <stdarg.h>
38 /* RELA relocations are used here. */
40 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 static bfd_reloc_status_type ppc_elf_unhandled_reloc
45 /* Branch prediction bit for branch taken relocs. */
46 #define BRANCH_PREDICT_BIT 0x200000
47 /* Mask to set RA in memory instructions. */
48 #define RA_REGISTER_MASK 0x001f0000
49 /* Value to shift register by to insert RA. */
50 #define RA_REGISTER_SHIFT 16
52 /* The name of the dynamic interpreter. This is put in the .interp
53 section. */
56 /* For old-style PLT. */
57 /* The number of single-slot PLT entries (the rest use two slots). */
58 #define PLT_NUM_SINGLE_ENTRIES 8192
60 /* For new-style .glink and .plt. */
61 #define GLINK_PLTRESOLVE 16*4
62 #define GLINK_ENTRY_SIZE 4*4
64 /* VxWorks uses its own plt layout, filled in by the static linker. */
66 /* The standard VxWorks PLT entry. */
67 #define VXWORKS_PLT_ENTRY_SIZE 32
68 static const bfd_vma ppc_elf_vxworks_plt_entry
70 {
79 };
80 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
82 {
91 };
93 /* The initial VxWorks PLT entry. */
94 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
95 static const bfd_vma ppc_elf_vxworks_plt0_entry
97 {
106 };
107 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
109 {
118 };
120 /* For executables, we have some additional relocations in
121 .rela.plt.unloaded, for the kernel loader. */
123 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
124 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
125 /* The number of relocations in the PLTResolve slot. */
126 #define VXWORKS_PLTRESOLVE_RELOCS 2
127 /* The number of relocations in the PLTResolve slot when when creating
128 a shared library. */
129 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
131 /* Some instructions. */
132 #define ADDIS_11_11 0x3d6b0000
133 #define ADDIS_11_30 0x3d7e0000
134 #define ADDIS_12_12 0x3d8c0000
135 #define ADDI_11_11 0x396b0000
136 #define ADD_0_11_11 0x7c0b5a14
137 #define ADD_11_0_11 0x7d605a14
138 #define B 0x48000000
139 #define BCL_20_31 0x429f0005
140 #define BCTR 0x4e800420
141 #define LIS_11 0x3d600000
142 #define LIS_12 0x3d800000
143 #define LWZU_0_12 0x840c0000
144 #define LWZ_0_12 0x800c0000
145 #define LWZ_11_11 0x816b0000
146 #define LWZ_11_30 0x817e0000
147 #define LWZ_12_12 0x818c0000
148 #define MFLR_0 0x7c0802a6
149 #define MFLR_12 0x7d8802a6
150 #define MTCTR_0 0x7c0903a6
151 #define MTCTR_11 0x7d6903a6
152 #define MTLR_0 0x7c0803a6
153 #define NOP 0x60000000
154 #define SUB_11_11_12 0x7d6c5850
156 /* Offset of tp and dtp pointers from start of TLS block. */
157 #define TP_OFFSET 0x7000
158 #define DTP_OFFSET 0x8000
159 \f
163 /* This reloc does nothing. */
178 /* A standard 32 bit relocation. */
193 /* An absolute 26 bit branch; the lower two bits must be zero.
194 FIXME: we don't check that, we just clear them. */
209 /* A standard 16 bit relocation. */
224 /* A 16 bit relocation without overflow. */
239 /* The high order 16 bits of an address. */
254 /* The high order 16 bits of an address, plus 1 if the contents of
255 the low 16 bits, treated as a signed number, is negative. */
270 /* An absolute 16 bit branch; the lower two bits must be zero.
271 FIXME: we don't check that, we just clear them. */
286 /* An absolute 16 bit branch, for which bit 10 should be set to
287 indicate that the branch is expected to be taken. The lower two
288 bits must be zero. */
303 /* An absolute 16 bit branch, for which bit 10 should be set to
304 indicate that the branch is not expected to be taken. The lower
305 two bits must be zero. */
320 /* A relative 26 bit branch; the lower two bits must be zero. */
335 /* A relative 16 bit branch; the lower two bits must be zero. */
350 /* A relative 16 bit branch. Bit 10 should be set to indicate that
351 the branch is expected to be taken. The lower two bits must be
352 zero. */
367 /* A relative 16 bit branch. Bit 10 should be set to indicate that
368 the branch is not expected to be taken. The lower two bits must
369 be zero. */
384 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
385 symbol. */
400 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
401 the symbol. */
416 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
417 the symbol. */
432 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
433 the symbol. */
448 /* Like R_PPC_REL24, but referring to the procedure linkage table
449 entry for the symbol. */
464 /* This is used only by the dynamic linker. The symbol should exist
465 both in the object being run and in some shared library. The
466 dynamic linker copies the data addressed by the symbol from the
467 shared library into the object, because the object being
468 run has to have the data at some particular address. */
483 /* Like R_PPC_ADDR32, but used when setting global offset table
484 entries. */
499 /* Marks a procedure linkage table entry for a symbol. */
514 /* Used only by the dynamic linker. When the object is run, this
515 longword is set to the load address of the object, plus the
516 addend. */
531 /* Like R_PPC_REL24, but uses the value of the symbol within the
532 object rather than the final value. Normally used for
533 _GLOBAL_OFFSET_TABLE_. */
548 /* Like R_PPC_ADDR32, but may be unaligned. */
563 /* Like R_PPC_ADDR16, but may be unaligned. */
578 /* 32-bit PC relative */
593 /* 32-bit relocation to the symbol's procedure linkage table.
594 FIXME: not supported. */
609 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
610 FIXME: not supported. */
625 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
626 the symbol. */
641 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
642 the symbol. */
657 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
658 the symbol. */
673 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
674 small data items. */
689 /* 16-bit section relative relocation. */
704 /* 16-bit lower half section relative relocation. */
719 /* 16-bit upper half section relative relocation. */
734 /* 16-bit upper half adjusted section relative relocation. */
749 /* Marker reloc for TLS. */
764 /* Computes the load module index of the load module that contains the
765 definition of its TLS sym. */
780 /* Computes a dtv-relative displacement, the difference between the value
781 of sym+add and the base address of the thread-local storage block that
782 contains the definition of sym, minus 0x8000. */
797 /* A 16 bit dtprel reloc. */
812 /* Like DTPREL16, but no overflow. */
827 /* Like DTPREL16_LO, but next higher group of 16 bits. */
842 /* Like DTPREL16_HI, but adjust for low 16 bits. */
857 /* Computes a tp-relative displacement, the difference between the value of
858 sym+add and the value of the thread pointer (r13). */
873 /* A 16 bit tprel reloc. */
888 /* Like TPREL16, but no overflow. */
903 /* Like TPREL16_LO, but next higher group of 16 bits. */
918 /* Like TPREL16_HI, but adjust for low 16 bits. */
933 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
934 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
935 to the first entry. */
950 /* Like GOT_TLSGD16, but no overflow. */
965 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
980 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
995 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
996 with values (sym+add)@dtpmod and zero, and computes the offset to the
997 first entry. */
1012 /* Like GOT_TLSLD16, but no overflow. */
1027 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1042 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1057 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1058 the offset to the entry. */
1073 /* Like GOT_DTPREL16, but no overflow. */
1088 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1103 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1118 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1119 offset to the entry. */
1134 /* Like GOT_TPREL16, but no overflow. */
1149 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1164 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1179 /* The remaining relocs are from the Embedded ELF ABI, and are not
1180 in the SVR4 ELF ABI. */
1182 /* 32 bit value resulting from the addend minus the symbol. */
1197 /* 16 bit value resulting from the addend minus the symbol. */
1212 /* 16 bit value resulting from the addend minus the symbol. */
1227 /* The high order 16 bits of the addend minus the symbol. */
1242 /* The high order 16 bits of the result of the addend minus the address,
1243 plus 1 if the contents of the low 16 bits, treated as a signed number,
1244 is negative. */
1259 /* 16 bit value resulting from allocating a 4 byte word to hold an
1260 address in the .sdata section, and returning the offset from
1261 _SDA_BASE_ for that relocation. */
1276 /* 16 bit value resulting from allocating a 4 byte word to hold an
1277 address in the .sdata2 section, and returning the offset from
1278 _SDA2_BASE_ for that relocation. */
1293 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1294 small data items. */
1309 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1310 signed offset from the appropriate base, and filling in the register
1311 field with the appropriate register (0, 2, or 13). */
1326 /* Relocation not handled: R_PPC_EMB_MRKREF */
1327 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1328 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1330 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1331 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1333 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1334 in the 16 bit signed offset from the appropriate base, and filling in the
1335 register field with the appropriate register (0, 2, or 13). */
1350 /* A 16 bit relative relocation. */
1365 /* A 16 bit relative relocation without overflow. */
1380 /* The high order 16 bits of a relative address. */
1395 /* The high order 16 bits of a relative address, plus 1 if the contents of
1396 the low 16 bits, treated as a signed number, is negative. */
1411 /* GNU extension to record C++ vtable hierarchy. */
1426 /* GNU extension to record C++ vtable member usage. */
1441 /* Phony reloc to handle AIX style TOC entries. */
1455 };
1456 \f
1457 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1459 static void
1461 {
1466 i++)
1467 {
1473 }
1474 }
1478 bfd_reloc_code_real_type code)
1479 {
1482 /* Initialize howto table if not already done. */
1487 {
1576 }
1579 };
1581 /* Set the howto pointer for a PowerPC ELF reloc. */
1583 static void
1587 {
1588 /* Initialize howto table if not already done. */
1594 }
1596 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1598 static bfd_reloc_status_type
1606 {
1607 bfd_vma relocation;
1610 {
1613 }
1620 else
1632 }
1634 static bfd_reloc_status_type
1642 {
1643 /* If this is a relocatable link (output_bfd test tells us), just
1644 call the generic function. Any adjustment will be done at final
1645 link time. */
1651 {
1656 }
1658 }
1659 \f
1660 /* Sections created by the linker. */
1663 {
1664 /* Pointer to the bfd section. */
1666 /* Section name. */
1668 /* Associated bss section name. */
1670 /* Associated symbol name. */
1672 /* Associated symbol. */
1676 /* Linked list of allocated pointer entries. This hangs off of the
1677 symbol lists, and provides allows us to return different pointers,
1678 based on different addend's. */
1681 {
1682 /* next allocated pointer for this symbol */
1684 /* offset of pointer from beginning of section */
1685 bfd_vma offset;
1686 /* addend used */
1687 bfd_vma addend;
1688 /* which linker section this is */
1692 struct ppc_elf_obj_tdata
1693 {
1696 /* A mapping from local symbols to offsets into the various linker
1697 sections added. This is index by the symbol index. */
1699 };
1701 #define ppc_elf_tdata(bfd) \
1702 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1704 #define elf_local_ptr_offsets(bfd) \
1705 (ppc_elf_tdata (bfd)->linker_section_pointers)
1707 /* Override the generic function because we store some extras. */
1709 static bfd_boolean
1711 {
1713 {
1718 }
1720 }
1722 /* Fix bad default arch selected for a 32 bit input bfd when the
1723 default is 64 bit. */
1725 static bfd_boolean
1727 {
1729 {
1733 {
1734 /* Relies on arch after 64 bit default being 32 bit default. */
1737 }
1738 }
1740 }
1742 /* Function to set whether a module needs the -mrelocatable bit set. */
1744 static bfd_boolean
1746 {
1753 }
1755 /* Support for core dump NOTE sections. */
1757 static bfd_boolean
1759 {
1764 {
1769 /* pr_cursig */
1772 /* pr_pid */
1775 /* pr_reg */
1780 }
1782 /* Make a ".reg/999" section. */
1785 }
1787 static bfd_boolean
1789 {
1791 {
1800 }
1802 /* Note that for some reason, a spurious space is tacked
1803 onto the end of the args in some (at least one anyway)
1804 implementations, so strip it off if it exists. */
1806 {
1812 }
1815 }
1819 {
1821 {
1826 {
1837 }
1840 {
1859 }
1860 }
1861 }
1863 /* Return address for Ith PLT stub in section PLT, for relocation REL
1864 or (bfd_vma) -1 if it should not be included. */
1866 static bfd_vma
1870 {
1872 }
1874 /* Handle a PowerPC specific section when reading an object file. This
1875 is called when bfd_section_from_shdr finds a section with an unknown
1876 type. */
1878 static bfd_boolean
1883 {
1885 flagword flags;
1900 }
1902 /* Set up any other section flags and such that may be necessary. */
1904 static bfd_boolean
1908 {
1916 }
1918 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1919 need to bump up the number of section headers. */
1921 static int
1924 {
1937 }
1939 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1940 .PPC.EMB.sbss0 a normal section, and not a bss section so
1941 that the linker doesn't crater when trying to make more than
1942 2 sections. */
1945 {
1956 };
1958 /* This is what we want for new plt/got. */
1964 {
1967 /* See if this is one of the special sections. */
1974 {
1978 }
1981 }
1982 \f
1983 /* Very simple linked list structure for recording apuinfo values. */
1985 {
1988 }
1989 apuinfo_list;
1994 static void
1996 {
1998 }
2000 static void
2002 {
2006 {
2010 }
2019 }
2021 static unsigned
2023 {
2028 entry;
2033 }
2037 {
2043 ;
2046 }
2048 static void
2050 {
2054 {
2058 }
2061 }
2066 /* Scan the input BFDs and create a linked list of
2067 the APUinfo values that will need to be emitted. */
2069 static void
2071 {
2076 bfd_size_type output_section_size;
2086 /* Scan the input bfds, looking for apuinfo sections. */
2091 {
2094 {
2097 }
2098 }
2100 /* We need at least one input sections
2101 in order to make merging worthwhile. */
2105 /* Just make sure that the output section exists as well. */
2110 /* Allocate a buffer for the contents of the input sections. */
2118 /* Read in the input sections contents. */
2120 {
2130 {
2133 }
2137 {
2140 }
2142 /* Process the contents of the section. */
2146 /* Verify the contents of the header. Note - we have to
2147 extract the values this way in order to allow for a
2148 host whose endian-ness is different from the target. */
2160 /* Get the number of bytes used for apuinfo entries. */
2165 /* Make sure that we do not run off the end of the section. */
2169 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2173 /* Update the offset. */
2175 }
2179 /* Compute the size of the output section. */
2189 fail:
2194 }
2196 /* Prevent the output section from accumulating the input sections'
2197 contents. We have already stored this in our linked list structure. */
2199 static bfd_boolean
2204 {
2207 }
2209 /* Finally we can generate the output section. */
2211 static void
2213 {
2218 bfd_size_type length;
2233 {
2237 }
2239 /* Create the apuinfo header. */
2248 {
2251 }
2262 }
2263 \f
2264 /* The following functions are specific to the ELF linker, while
2265 functions above are used generally. They appear in this file more
2266 or less in the order in which they are called. eg.
2267 ppc_elf_check_relocs is called early in the link process,
2268 ppc_elf_finish_dynamic_sections is one of the last functions
2269 called. */
2271 /* The PPC linker needs to keep track of the number of relocs that it
2272 decides to copy as dynamic relocs in check_relocs for each symbol.
2273 This is so that it can later discard them if they are found to be
2274 unnecessary. We store the information in a field extending the
2275 regular ELF linker hash table. */
2277 struct ppc_elf_dyn_relocs
2278 {
2281 /* The input section of the reloc. */
2284 /* Total number of relocs copied for the input section. */
2285 bfd_size_type count;
2287 /* Number of pc-relative relocs copied for the input section. */
2288 bfd_size_type pc_count;
2289 };
2291 /* Track PLT entries needed for a given symbol. We might need more
2292 than one glink entry per symbol. */
2293 struct plt_entry
2294 {
2297 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2298 This field stores the offset into .got2 used to initialise the
2299 GOT pointer reg. It will always be at least 32768 (and for
2300 current gcc this is the only offset used). */
2301 bfd_vma addend;
2303 /* The .got2 section. */
2306 /* PLT refcount or offset. */
2307 union
2308 {
2309 bfd_signed_vma refcount;
2310 bfd_vma offset;
2313 /* .glink stub offset. */
2314 bfd_vma glink_offset;
2315 };
2317 /* Of those relocs that might be copied as dynamic relocs, this macro
2318 selects those that must be copied when linking a shared library,
2319 even when the symbol is local. */
2321 #define MUST_BE_DYN_RELOC(RTYPE) \
2322 ((RTYPE) != R_PPC_REL24 \
2323 && (RTYPE) != R_PPC_REL14 \
2324 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2325 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2326 && (RTYPE) != R_PPC_REL32)
2328 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2329 copying dynamic variables from a shared lib into an app's dynbss
2330 section, and instead use a dynamic relocation to point into the
2331 shared lib. */
2332 #define ELIMINATE_COPY_RELOCS 1
2334 /* PPC ELF linker hash entry. */
2336 struct ppc_elf_link_hash_entry
2337 {
2340 /* If this symbol is used in the linker created sections, the processor
2341 specific backend uses this field to map the field into the offset
2342 from the beginning of the section. */
2345 /* Track dynamic relocs copied for this symbol. */
2348 /* Contexts in which symbol is used in the GOT (or TOC).
2349 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2350 corresponding relocs are encountered during check_relocs.
2351 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2352 indicate the corresponding GOT entry type is not needed. */
2361 /* Nonzero if we have seen a small data relocation referring to this
2362 symbol. */
2364 };
2366 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2369 PLT_UNSET,
2370 PLT_OLD,
2371 PLT_NEW,
2372 PLT_VXWORKS
2373 };
2375 /* PPC ELF linker hash table. */
2377 struct ppc_elf_link_hash_table
2378 {
2381 /* Short-cuts to get to dynamic linker sections. */
2394 /* Shortcut to .__tls_get_addr. */
2397 /* TLS local dynamic got entry handling. */
2399 bfd_signed_vma refcount;
2400 bfd_vma offset;
2403 /* Offset of PltResolve function in glink. */
2404 bfd_vma glink_pltresolve;
2406 /* Size of reserved GOT entries. */
2408 /* Non-zero if allocating the header left a gap. */
2411 /* The type of PLT we have chosen to use. */
2414 /* Whether we can use the new PLT layout. */
2417 /* Set if we should emit symbols for stubs. */
2420 /* Small local sym to section mapping cache. */
2423 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2426 /* The .got.plt section (VxWorks only)*/
2429 /* True if the target system is VxWorks. */
2432 /* The size of PLT entries. */
2434 /* The distance between adjacent PLT slots. */
2436 /* The size of the first PLT entry. */
2438 };
2440 /* Get the PPC ELF linker hash table from a link_info structure. */
2442 #define ppc_elf_hash_table(p) \
2443 ((struct ppc_elf_link_hash_table *) (p)->hash)
2445 /* Create an entry in a PPC ELF linker hash table. */
2451 {
2452 /* Allocate the structure if it has not already been allocated by a
2453 subclass. */
2455 {
2460 }
2462 /* Call the allocation method of the superclass. */
2465 {
2469 }
2472 }
2474 /* Create a PPC ELF linker hash table. */
2478 {
2486 ppc_elf_link_hash_newfunc,
2488 {
2491 }
2513 }
2515 /* Create .got and the related sections. */
2517 static bfd_boolean
2519 {
2522 flagword flags;
2533 {
2537 }
2538 else
2539 {
2540 /* The powerpc .got has a blrl instruction in it. Mark it
2541 executable. */
2546 }
2556 }
2558 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2559 to output sections (just like _bfd_elf_create_dynamic_sections has
2560 to create .dynbss and .rela.bss). */
2562 static bfd_boolean
2564 {
2567 flagword flags;
2595 {
2602 }
2615 /* The VxWorks PLT is a loaded section with contents. */
2618 }
2620 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2622 static void
2626 {
2633 {
2635 {
2639 /* Add reloc counts against the indirect sym to the direct sym
2640 list. Merge any entries against the same section. */
2642 {
2647 {
2652 }
2655 }
2657 }
2661 }
2666 /* If called to transfer flags for a weakdef during processing
2667 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2668 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2679 /* If we were called to copy over info for a weak sym, that's all. */
2683 /* Copy over the GOT refcount entries that we may have already seen to
2684 the symbol which just became indirect. */
2688 /* And plt entries. */
2690 {
2692 {
2697 {
2702 {
2706 }
2709 }
2711 }
2715 }
2718 {
2726 }
2727 }
2729 /* Return 1 if target is one of ours. */
2731 static bfd_boolean
2733 {
2741 }
2743 /* Hook called by the linker routine which adds symbols from an object
2744 file. We use it to put .comm items in .sbss, and not .bss. */
2746 static bfd_boolean
2754 {
2759 {
2760 /* Common symbols less than or equal to -G nn bytes are automatically
2761 put into .sbss. */
2766 {
2774 flags);
2777 }
2781 }
2784 }
2785 \f
2786 static bfd_boolean
2789 {
2798 }
2800 /* Create a special linker section. */
2802 static bfd_boolean
2805 flagword flags,
2807 {
2814 /* Record the first bfd that needs the special sections. */
2820 flags);
2827 }
2829 /* Find a linker generated pointer with a given addend and type. */
2832 elf_find_pointer_linker_section
2834 bfd_vma addend,
2836 {
2842 }
2844 /* Allocate a pointer to live in a linker created section. */
2846 static bfd_boolean
2851 {
2855 bfd_size_type amt;
2859 /* Is this a global symbol? */
2861 {
2864 /* Has this symbol already been allocated? If so, our work is done. */
2868 lsect))
2872 }
2873 else
2874 {
2875 /* Allocation of a pointer to a local symbol. */
2878 /* Allocate a table to hold the local symbols if first time. */
2880 {
2891 }
2893 /* Has this symbol already been allocated? If so, our work is done. */
2896 lsect))
2900 }
2902 /* Allocate space for a pointer in the linker section, and allocate
2903 a new pointer record from internal memory. */
2919 #ifdef DEBUG
2924 #endif
2927 }
2929 static bfd_boolean
2934 {
2939 {
2947 }
2953 }
2955 static bfd_boolean
2958 {
2967 {
2977 }
2980 }
2984 {
2993 }
2995 static void
2997 {
3000 abfd,
3003 }
3005 /* Look through the relocs for a section during the first phase, and
3006 allocate space in the global offset table or procedure linkage
3007 table. */
3009 static bfd_boolean
3014 {
3025 /* Don't do anything special with non-loaded, non-alloced sections.
3026 In particular, any relocs in such sections should not affect GOT
3027 and PLT reference counting (ie. we don't allow them to create GOT
3028 or PLT entries), there's no possibility or desire to optimize TLS
3029 relocs, and there's not much point in propagating relocs to shared
3030 libs that the dynamic linker won't relocate. */
3034 #ifdef DEBUG
3037 #endif
3039 /* Initialize howto table if not already done. */
3051 {
3060 else
3061 {
3066 }
3068 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3069 This shows up in particular in an R_PPC_ADDR32 in the eabi
3070 startup code. */
3074 {
3080 }
3084 {
3114 dogottls:
3116 /* Fall thru */
3118 /* GOT16 relocations */
3123 /* This symbol requires a global offset table entry. */
3125 {
3130 }
3132 {
3135 }
3136 else
3137 /* This is a global offset table entry for a local symbol. */
3142 /* Indirect .sdata relocation. */
3145 {
3148 }
3157 {
3160 }
3163 /* Indirect .sdata2 relocation. */
3166 {
3169 }
3178 {
3181 }
3186 {
3189 }
3194 {
3197 }
3202 {
3205 }
3210 {
3213 }
3219 {
3222 }
3230 {
3233 }
3242 {
3245 }
3256 #ifdef DEBUG
3258 #endif
3259 /* This symbol requires a procedure linkage table entry. We
3260 actually build the entry in finish_dynamic_symbol,
3261 because this might be a case of linking PIC code without
3262 linking in any dynamic objects, in which case we don't
3263 need to generate a procedure linkage table after all. */
3266 {
3267 /* It does not make sense to have a procedure linkage
3268 table entry for a local symbol. */
3271 abfd,
3272 sec,
3277 }
3278 else
3279 {
3285 }
3288 /* The following relocations don't need to propagate the
3289 relocation if linking a shared object since they are
3290 section relative. */
3309 /* These are just markers. */
3316 /* These should only appear in dynamic objects. */
3323 /* These aren't handled yet. We'll report an error later. */
3332 /* This refers only to functions defined in the shared library. */
3338 /* This relocation describes the C++ object vtable hierarchy.
3339 Reconstruct it for later use during GC. */
3345 /* This relocation describes which C++ vtable entries are actually
3346 used. Record for later use during GC. */
3352 /* We shouldn't really be seeing these. */
3358 /* Nor these. */
3377 {
3378 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3379 the start of a function, which assembles to a REL32
3380 reference to .got2. If we detect one of these, then
3381 force the old PLT layout because the linker cannot
3382 reliably deduce the GOT pointer value needed for
3383 PLT call stubs. */
3387 r_symndx);
3390 }
3402 {
3406 }
3407 /* fall through */
3420 dodyn1:
3422 {
3423 /* We may need a plt entry if the symbol turns out to be
3424 a function defined in a dynamic object. */
3428 /* We may need a copy reloc too. */
3430 }
3432 dodyn:
3433 /* If we are creating a shared library, and this is a reloc
3434 against a global symbol, or a non PC relative reloc
3435 against a local symbol, then we need to copy the reloc
3436 into the shared library. However, if we are linking with
3437 -Bsymbolic, we do not need to copy a reloc against a
3438 global symbol which is defined in an object we are
3439 including in the link (i.e., DEF_REGULAR is set). At
3440 this point we have not seen all the input files, so it is
3441 possible that DEF_REGULAR is not set now but will be set
3442 later (it is never cleared). In case of a weak definition,
3443 DEF_REGULAR may be cleared later by a strong definition in
3444 a shared library. We account for that possibility below by
3445 storing information in the dyn_relocs field of the hash
3446 table entry. A similar situation occurs when creating
3447 shared libraries and symbol visibility changes render the
3448 symbol local.
3450 If on the other hand, we are creating an executable, we
3451 may need to keep relocations for symbols satisfied by a
3452 dynamic library if we manage to avoid copy relocs for the
3453 symbol. */
3460 || (ELIMINATE_COPY_RELOCS
3465 {
3469 #ifdef DEBUG
3471 "ppc_elf_check_relocs needs to "
3475 #endif
3477 {
3480 name = (bfd_elf_string_from_elf_section
3495 {
3496 flagword flags;
3502 name,
3503 flags);
3508 }
3510 }
3512 /* If this is a global symbol, we count the number of
3513 relocations we need for this symbol. */
3515 {
3517 }
3518 else
3519 {
3520 /* Track dynamic relocs needed for local syms too.
3521 We really need local syms available to do this
3522 easily. Oh well. */
3534 }
3538 {
3547 }
3552 }
3555 }
3556 }
3559 }
3560 \f
3561 /* Merge backend specific data from an object file to the output
3562 object file when linking. */
3564 static bfd_boolean
3566 {
3567 flagword old_flags;
3568 flagword new_flags;
3569 bfd_boolean error;
3575 /* Check if we have the same endianess. */
3582 {
3583 /* First call, no flags set. */
3586 }
3588 /* Compatible flags are ok. */
3590 ;
3592 /* Incompatible flags. */
3593 else
3594 {
3595 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3596 to be linked with either. */
3600 {
3605 }
3608 {
3613 }
3615 /* The output is -mrelocatable-lib iff both the input files are. */
3619 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3620 but each input file is either -mrelocatable or -mrelocatable-lib. */
3626 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3627 any module uses it. */
3633 /* Warn about any other mismatches. */
3635 {
3641 }
3644 {
3647 }
3648 }
3651 }
3652 \f
3653 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3654 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3655 int
3660 {
3662 flagword flags;
3675 {
3679 /* The new PLT is a loaded section. */
3684 /* The new GOT is not executable. */
3688 }
3689 else
3690 {
3691 /* Stop an unused .glink section from affecting .text alignment. */
3695 }
3697 }
3698 \f
3699 /* Return the section that should be marked against GC for a given
3700 relocation. */
3708 {
3711 {
3715 }
3718 }
3720 /* Update the got, plt and dynamic reloc reference counts for the
3721 section being removed. */
3723 static bfd_boolean
3728 {
3749 {
3756 {
3768 {
3769 /* Everything must go for SEC. */
3772 }
3773 }
3777 {
3783 /* Fall thru */
3802 {
3805 }
3807 {
3810 }
3820 /* Fall thru */
3843 {
3848 }
3853 }
3854 }
3856 }
3857 \f
3858 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3860 asection *
3862 {
3869 {
3872 }
3877 }
3879 /* Run through all the TLS relocs looking for optimization
3880 opportunities. */
3882 bfd_boolean
3885 {
3895 {
3901 {
3905 /* Read the relocations. */
3914 {
3920 bfd_boolean is_local;
3924 {
3932 }
3941 {
3946 /* These relocs should never be against a symbol
3947 defined in a shared lib. Leave them alone if
3948 that turns out to be the case. */
3954 /* LD -> LE */
3965 /* GD -> LE */
3967 else
3968 /* GD -> IE */
3980 {
3981 /* IE -> LE */
3985 }
3986 else
3996 {
4000 }
4007 }
4010 {
4012 {
4013 /* We managed to get rid of a got entry. */
4016 }
4018 }
4019 else
4020 {
4026 {
4033 {
4037 }
4038 }
4044 {
4045 /* We managed to get rid of a got entry. */
4048 }
4051 }
4055 }
4059 }
4063 {
4066 else
4068 }
4069 }
4071 }
4072 \f
4073 /* Adjust a symbol defined by a dynamic object and referenced by a
4074 regular object. The current definition is in some section of the
4075 dynamic object, but we're not including those sections. We have to
4076 change the definition to something the rest of the link can
4077 understand. */
4079 static bfd_boolean
4082 {
4087 #ifdef DEBUG
4090 #endif
4092 /* Make sure we know what is going on here. */
4101 /* Deal with function syms. */
4104 {
4105 /* Clear procedure linkage table information for any symbol that
4106 won't need a .plt entry. */
4115 {
4116 /* A PLT entry is not required/allowed when:
4118 1. We are not using ld.so; because then the PLT entry
4119 can't be set up, so we can't use one. In this case,
4120 ppc_elf_adjust_dynamic_symbol won't even be called.
4122 2. GC has rendered the entry unused.
4124 3. We know for certain that a call to this symbol
4125 will go to this object, or will remain undefined. */
4128 }
4130 }
4131 else
4134 /* If this is a weak symbol, and there is a real definition, the
4135 processor independent code will have arranged for us to see the
4136 real definition first, and we can just use the same value. */
4138 {
4146 }
4148 /* This is a reference to a symbol defined by a dynamic object which
4149 is not a function. */
4151 /* If we are creating a shared library, we must presume that the
4152 only references to the symbol are via the global offset table.
4153 For such cases we need not do anything here; the relocations will
4154 be handled correctly by relocate_section. */
4158 /* If there are no references to this symbol that do not use the
4159 GOT, we don't need to generate a copy reloc. */
4163 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4164 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4165 do this if there are any small data relocations. */
4168 {
4171 {
4175 }
4178 {
4181 }
4182 }
4185 {
4189 }
4191 /* We must allocate the symbol in our .dynbss section, which will
4192 become part of the .bss section of the executable. There will be
4193 an entry for this symbol in the .dynsym section. The dynamic
4194 object will contain position independent code, so all references
4195 from the dynamic object to this symbol will go through the global
4196 offset table. The dynamic linker will use the .dynsym entry to
4197 determine the address it must put in the global offset table, so
4198 both the dynamic object and the regular object will refer to the
4199 same memory location for the variable.
4201 Of course, if the symbol is referenced using SDAREL relocs, we
4202 must instead allocate it in .sbss. */
4206 else
4210 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4211 copy the initial value out of the dynamic object and into the
4212 runtime process image. We need to remember the offset into the
4213 .rela.bss section we are going to use. */
4215 {
4220 else
4225 }
4227 /* We need to figure out the alignment required for this symbol. I
4228 have no idea how ELF linkers handle this. */
4233 /* Apply the required alignment. */
4236 {
4239 }
4241 /* Define the symbol as being at this point in the section. */
4245 /* Increment the section size to make room for the symbol. */
4249 }
4250 \f
4251 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4252 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4253 specifying the addend on the plt relocation. For -fpic code, the sym
4254 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4255 xxxxxxxx.got2.plt_pic32.<callee>. */
4257 static bfd_boolean
4261 {
4270 else
4290 {
4299 }
4301 }
4303 /* Allocate NEED contiguous space in .got, and return the offset.
4304 Handles allocation of the got header when crossing 32k. */
4306 static bfd_vma
4308 {
4309 bfd_vma where;
4313 {
4316 }
4317 else
4318 {
4321 {
4324 }
4325 else
4326 {
4329 {
4332 }
4335 }
4336 }
4338 }
4340 /* Allocate space in associated reloc sections for dynamic relocs. */
4342 static bfd_boolean
4344 {
4354 /* When warning symbols are created, they **replace** the "real"
4355 entry in the hash table, thus we never get to see the real
4356 symbol in a hash traversal. So look at it now. */
4361 {
4368 {
4369 /* Make sure this symbol is output as a dynamic symbol. */
4372 {
4375 }
4379 {
4383 {
4385 {
4388 }
4393 {
4396 }
4400 {
4403 }
4409 }
4410 else
4411 {
4413 {
4414 /* If this is the first .plt entry, make room
4415 for the special first entry. */
4419 /* The PowerPC PLT is actually composed of two
4420 parts, the first part is 2 words (for a load
4421 and a jump), and then there is a remaining
4422 word available at the end. */
4429 /* If this symbol is not defined in a regular
4430 file, and we are not generating a shared
4431 library, then set the symbol to this location
4432 in the .plt. This is required to make
4433 function pointers compare as equal between
4434 the normal executable and the shared library. */
4437 {
4440 }
4442 /* Make room for this entry. */
4444 /* After the 8192nd entry, room for two entries
4445 is allocated. */
4451 }
4453 }
4455 /* We also need to make an entry in the .rela.plt section. */
4457 {
4461 {
4462 /* Allocate space for the unloaded relocations. */
4464 {
4467 {
4471 }
4476 }
4478 /* Every PLT entry has an associated GOT entry in
4479 .got.plt. */
4481 }
4483 }
4484 }
4485 else
4489 {
4492 }
4493 }
4494 }
4495 else
4496 {
4499 }
4503 {
4504 /* Make sure this symbol is output as a dynamic symbol. */
4507 {
4510 }
4514 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4516 else
4517 {
4518 bfd_boolean dyn;
4521 {
4530 }
4531 else
4539 {
4540 /* All the entries we allocated need relocs.
4541 Except LD only needs one. */
4545 }
4546 }
4547 }
4548 else
4554 /* In the shared -Bsymbolic case, discard space allocated for
4555 dynamic pc-relative relocs against symbols which turn out to be
4556 defined in regular objects. For the normal shared case, discard
4557 space for relocs that have become local due to symbol visibility
4558 changes. */
4561 {
4562 /* Relocs that use pc_count are those that appear on a call insn,
4563 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4564 generated via assembly. We want calls to protected symbols to
4565 resolve directly to the function rather than going via the plt.
4566 If people want function pointer comparisons to work as expected
4567 then they should avoid writing weird assembly. */
4569 {
4573 {
4578 else
4580 }
4581 }
4583 /* Also discard relocs on undefined weak syms with non-default
4584 visibility. */
4587 {
4591 /* Make sure undefined weak symbols are output as a dynamic
4592 symbol in PIEs. */
4595 {
4598 }
4599 }
4600 }
4602 {
4603 /* For the non-shared case, discard space for relocs against
4604 symbols which turn out to need copy relocs or are not
4605 dynamic. */
4610 {
4611 /* Make sure this symbol is output as a dynamic symbol.
4612 Undefined weak syms won't yet be marked as dynamic. */
4615 {
4618 }
4620 /* If that succeeded, we know we'll be keeping all the
4621 relocs. */
4624 }
4628 keep: ;
4629 }
4631 /* Finally, allocate space. */
4633 {
4636 }
4639 }
4641 /* Find any dynamic relocs that apply to read-only sections. */
4643 static bfd_boolean
4645 {
4655 {
4661 {
4664 /* Not an error, just cut short the traversal. */
4666 }
4667 }
4669 }
4671 /* Set the sizes of the dynamic sections. */
4673 static bfd_boolean
4676 {
4679 bfd_boolean relocs;
4682 #ifdef DEBUG
4684 #endif
4690 {
4691 /* Set the contents of the .interp section to the interpreter. */
4693 {
4698 }
4699 }
4706 /* Set up .got offsets for local syms, and space for local dynamic
4707 relocs. */
4709 {
4713 bfd_size_type locsymcount;
4720 {
4727 {
4730 {
4731 /* Input section has been discarded, either because
4732 it is a copy of a linkonce section or due to
4733 linker script /DISCARD/, so we'll be discarding
4734 the relocs too. */
4735 }
4737 {
4744 }
4745 }
4746 }
4758 {
4760 {
4761 /* If just an LD reloc, we'll just use
4762 htab->tlsld_got.offset. */
4765 }
4766 else
4767 {
4770 {
4777 }
4778 else
4784 }
4785 }
4786 else
4788 }
4791 {
4795 }
4796 else
4799 /* Allocate space for global sym dynamic relocs. */
4803 {
4806 /* If we haven't allocated the header, do so now. When we get here,
4807 for old plt/got the got size will be 0 to 32764 (not allocated),
4808 or 32780 to 65536 (header allocated). For new plt/got, the
4809 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4811 {
4816 }
4819 }
4822 {
4824 /* Space for the branch table. */
4826 /* Pad out to align the start of PLTresolve. */
4831 {
4838 {
4847 }
4853 {
4862 }
4863 }
4864 }
4866 /* We've now determined the sizes of the various dynamic sections.
4867 Allocate memory for them. */
4870 {
4883 {
4884 /* We'd like to strip these sections if they aren't needed, but if
4885 we've exported dynamic symbols from them we must leave them.
4886 It's too late to tell BFD to get rid of the symbols. */
4889 /* Strip this section if we don't need it; see the
4890 comment below. */
4891 }
4894 {
4895 /* Strip these too. */
4896 }
4898 {
4900 {
4901 /* Remember whether there are any relocation sections. */
4904 /* We use the reloc_count field as a counter if we need
4905 to copy relocs into the output file. */
4907 }
4908 }
4909 else
4910 {
4911 /* It's not one of our sections, so don't allocate space. */
4913 }
4916 {
4917 /* If we don't need this section, strip it from the
4918 output file. This is mostly to handle .rela.bss and
4919 .rela.plt. We must create both sections in
4920 create_dynamic_sections, because they must be created
4921 before the linker maps input sections to output
4922 sections. The linker does that before
4923 adjust_dynamic_symbol is called, and it is that
4924 function which decides whether anything needs to go
4925 into these sections. */
4928 }
4933 /* Allocate memory for the section contents. */
4937 }
4940 {
4941 /* Add some entries to the .dynamic section. We fill in the
4942 values later, in ppc_elf_finish_dynamic_sections, but we
4943 must add the entries now so that we get the correct size for
4944 the .dynamic section. The DT_DEBUG entry is filled in by the
4945 dynamic linker and used by the debugger. */
4946 #define add_dynamic_entry(TAG, VAL) \
4947 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4950 {
4953 }
4956 {
4962 }
4965 {
4968 }
4971 {
4976 }
4978 /* If any dynamic relocs apply to a read-only section, then we
4979 need a DT_TEXTREL entry. */
4982 info);
4985 {
4988 }
4989 }
4990 #undef add_dynamic_entry
4993 }
4994 \f
4995 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4998 {
5007 };
5010 {
5015 };
5017 static bfd_boolean
5022 {
5023 struct one_fixup
5024 {
5027 bfd_vma toff;
5028 bfd_vma trampoff;
5029 };
5037 bfd_boolean changed;
5039 bfd_size_type trampoff;
5044 /* Nothing to do if there are no relocations, and no need to do
5045 anything with non-alloc sections. */
5052 /* Space for a branch around any trampolines. */
5057 /* Get a copy of the native relocations. */
5068 {
5080 {
5095 }
5097 /* Get the value of the symbol referred to by the reloc. */
5099 {
5100 /* A local symbol. */
5103 /* Read this BFD's local symbols. */
5105 {
5113 }
5121 else
5126 }
5127 else
5128 {
5129 /* Global symbol handling. */
5144 {
5148 {
5150 {
5153 }
5154 else
5155 {
5158 }
5159 }
5160 }
5162 ;
5165 {
5168 }
5169 else
5173 }
5175 /* If the branch and target are in the same section, you have
5176 no hope of adding stubs. We'll error out later should the
5177 branch overflow. */
5181 /* There probably isn't any reason to handle symbols in
5182 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5183 attribute for a code section, and we are only looking at
5184 branches. However, implement it correctly here as a
5185 reference for other target relax_section functions. */
5187 {
5188 /* At this stage in linking, no SEC_MERGE symbol has been
5189 adjusted, so all references to such symbols need to be
5190 passed through _bfd_merged_section_offset. (Later, in
5191 relocate_section, all SEC_MERGE symbols *except* for
5192 section symbols have been adjusted.)
5194 gas may reduce relocations against symbols in SEC_MERGE
5195 sections to a relocation against the section symbol when
5196 the original addend was zero. When the reloc is against
5197 a section symbol we should include the addend in the
5198 offset passed to _bfd_merged_section_offset, since the
5199 location of interest is the original symbol. On the
5200 other hand, an access to "sym+addend" where "sym" is not
5201 a section symbol should not include the addend; Such an
5202 access is presumed to be an offset from "sym"; The
5203 location of interest is just "sym". */
5209 toff);
5213 }
5214 /* PLTREL24 addends are special. */
5218 /* Attempted -shared link of non-pic code loses. */
5227 /* If the branch is in range, no need to do anything. */
5231 /* Look for an existing fixup to this address. */
5237 {
5243 /* Oh dear, we can't reach a trampoline. Don't try to add
5244 one. We'll report an error later. */
5248 {
5252 }
5253 else
5254 {
5258 }
5267 /* Hijack the old relocation. Since we need two
5268 relocations for this use a "composite" reloc. */
5270 stub_rtype);
5273 /* Record the fixup so we don't do it again this section. */
5282 }
5283 else
5284 {
5289 /* Nop out the reloc, since we're finalizing things here. */
5291 }
5293 /* Get the section contents. */
5295 {
5296 /* Get cached copy if it exists. */
5299 else
5300 {
5301 /* Go get them off disk. */
5304 }
5305 }
5307 /* Fix up the existing branch to hit the trampoline. */
5310 {
5328 }
5329 }
5331 /* Write out the trampolines. */
5334 {
5337 bfd_vma val;
5340 do
5341 {
5345 }
5353 /* Branch around the trampolines. */
5361 {
5364 }
5365 else
5366 {
5369 }
5373 {
5375 i++;
5379 }
5381 }
5385 {
5388 else
5389 {
5390 /* Cache the symbols for elf_link_input_bfd. */
5392 }
5393 }
5397 {
5400 else
5401 {
5402 /* Cache the section contents for elf_link_input_bfd. */
5404 }
5405 }
5408 {
5411 else
5413 }
5418 error_return:
5428 }
5429 \f
5430 /* What to do when ld finds relocations against symbols defined in
5431 discarded sections. */
5433 static unsigned int
5435 {
5443 }
5444 \f
5445 /* Fill in the address for a pointer generated in a linker section. */
5447 static bfd_vma
5451 bfd_vma relocation,
5453 {
5459 {
5460 /* Handle global symbol. */
5466 }
5467 else
5468 {
5469 /* Handle local symbol. */
5474 }
5478 lsect);
5481 /* Offset will always be a multiple of four, so use the bottom bit
5482 as a "written" flag. */
5484 {
5489 }
5495 #ifdef DEBUG
5499 #endif
5501 /* Subtract out the addend, because it will get added back in by the normal
5502 processing. */
5504 }
5506 /* The RELOCATE_SECTION function is called by the ELF backend linker
5507 to handle the relocations for a section.
5509 The relocs are always passed as Rela structures; if the section
5510 actually uses Rel structures, the r_addend field will always be
5511 zero.
5513 This function is responsible for adjust the section contents as
5514 necessary, and (if using Rela relocs and generating a
5515 relocatable output file) adjusting the reloc addend as
5516 necessary.
5518 This function does not have to worry about setting the reloc
5519 address or the reloc symbol index.
5521 LOCAL_SYMS is a pointer to the swapped in local symbols.
5523 LOCAL_SECTIONS is an array giving the section in the input file
5524 corresponding to the st_shndx field of each local symbol.
5526 The global hash table entry for the global symbols can be found
5527 via elf_sym_hashes (input_bfd).
5529 When generating relocatable output, this function must handle
5530 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5531 going to be the section symbol corresponding to the output
5532 section, which means that the addend must be adjusted
5533 accordingly. */
5535 static bfd_boolean
5544 {
5550 Elf_Internal_Rela outrel;
5557 #ifdef DEBUG
5563 #endif
5568 {
5575 {
5581 {
5582 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5583 addend specifies the GOT pointer offset within .got2. */
5585 }
5586 }
5588 }
5590 /* Initialize howto table if not already done. */
5601 {
5603 bfd_vma addend;
5604 bfd_reloc_status_type r;
5611 bfd_vma relocation;
5613 bfd_boolean unresolved_reloc;
5614 bfd_boolean warned;
5626 {
5632 }
5633 else
5634 {
5641 }
5643 /* TLS optimizations. Replace instruction sequences and relocs
5644 based on information we collected in tls_optimize. We edit
5645 RELOCS so that --emit-relocs will output something sensible
5646 for the final instruction stream. */
5650 {
5654 {
5658 }
5659 }
5661 /* Ensure reloc mapping code below stays sane. */
5672 {
5680 {
5681 bfd_vma insn;
5688 }
5694 {
5703 else
5706 /* add -> addi. */
5712 /* load and store indexed -> dform. */
5716 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5721 /* lwax -> lwa. */
5723 else
5730 /* Was PPC_TLS which sits on insn boundary, now
5731 PPC_TPREL16_LO which is at low-order half-word. */
5733 }
5746 {
5747 tls_gdld_hi:
5751 else
5752 {
5756 }
5758 }
5771 {
5772 tls_get_addr_check:
5774 {
5779 bfd_vma offset;
5781 /* The next instruction should be a call to
5782 __tls_get_addr. Peek at the reloc to be sure. */
5800 /* OK, it checks out. Replace the call. */
5805 {
5806 /* IE */
5815 }
5816 else
5817 {
5818 /* LE */
5822 {
5823 /* Was an LD reloc. */
5826 }
5830 R_PPC_TPREL16_LO);
5833 }
5837 {
5838 /* We changed the symbol on an LD reloc. Start over
5839 in order to get h, sym, sec etc. right. */
5840 rel--;
5842 }
5843 }
5844 }
5846 }
5848 /* Handle other relocations that tweak non-addend part of insn. */
5851 {
5855 /* Branch taken prediction relocations. */
5859 /* Fall thru */
5861 /* Branch not taken prediction relocations. */
5872 /* Invert 'y' bit if not the default. */
5878 }
5886 {
5903 /* GOT16 relocations. Like an ADDR16 using the symbol's
5904 address in the GOT as relocation value instead of the
5905 symbol's value itself. Also, create a GOT entry for the
5906 symbol and put the symbol value there. */
5939 dogot:
5940 {
5941 /* Relocation is to the entry for this symbol in the global
5942 offset table. */
5943 bfd_vma off;
5956 {
5957 bfd_boolean dyn;
5962 /* This is actually a static link, or it is a
5963 -Bsymbolic link and the symbol is defined
5964 locally, or the symbol was forced to be local
5965 because of a version file. */
5966 ;
5967 else
5968 {
5971 }
5973 }
5974 else
5975 {
5979 }
5981 /* The offset must always be a multiple of 4. We use the
5982 least significant bit to record whether we have already
5983 processed this entry. */
5987 else
5988 {
5999 /* We might have multiple got entries for this sym.
6000 Initialize them all. */
6001 do
6002 {
6006 {
6009 }
6011 {
6014 }
6016 {
6019 }
6021 {
6024 }
6026 /* Generate relocs for the dynamic linker. */
6031 {
6037 {
6040 {
6047 outrel.r_info
6049 }
6050 }
6057 else
6060 {
6064 }
6069 }
6071 /* Init the .got section contents if we're not
6072 emitting a reloc. */
6073 else
6074 {
6080 {
6086 {
6090 }
6091 }
6094 }
6099 }
6104 }
6110 {
6112 {
6118 {
6122 {
6125 }
6126 }
6127 }
6128 }
6133 /* Addends on got relocations don't make much sense.
6134 x+off@got is actually x@got+off, and since the got is
6135 generated by a hash table traversal, the value in the
6136 got at entry m+n bears little relation to the entry m. */
6140 input_bfd,
6141 input_section,
6144 sym_name);
6145 }
6148 /* Relocations that need no special processing. */
6150 /* It makes no sense to point a local relocation
6151 at a symbol not in this object. */
6153 {
6156 input_bfd,
6157 input_section,
6159 TRUE))
6162 }
6172 /* Relocations that may need to be propagated if this is a shared
6173 object. */
6179 /* The TPREL16 relocs shouldn't really be used in shared
6180 libs as they will result in DT_TEXTREL being set, but
6181 support them anyway. */
6208 /* If these relocations are not to a named symbol, they can be
6209 handled right here, no need to bother the dynamic linker. */
6213 /* fall through */
6215 /* Relocations that always need to be propagated if this is a shared
6216 object. */
6228 /* r_symndx will be zero only for relocs against symbols
6229 from removed linkonce sections, or sections discarded by
6230 a linker script. */
6231 dodyn:
6233 {
6236 }
6237 /* Fall thru. */
6241 /* Fall thru. */
6249 || (ELIMINATE_COPY_RELOCS
6256 {
6259 #ifdef DEBUG
6264 #endif
6266 /* When generating a shared object, these relocations
6267 are copied into the output file to be resolved at run
6268 time. */
6270 {
6273 name = (bfd_elf_string_from_elf_section
6282 input_section),
6287 }
6303 {
6307 }
6308 else
6309 {
6314 else
6315 {
6321 {
6324 }
6325 else
6326 {
6329 /* We are turning this relocation into one
6330 against a section symbol. It would be
6331 proper to subtract the symbol's value,
6332 osec->vma, from the emitted reloc addend,
6333 but ld.so expects buggy relocs. */
6337 {
6340 }
6342 #ifdef DEBUG
6347 #endif
6348 }
6351 }
6352 }
6361 /* This reloc will be computed at runtime. We clear the memory
6362 so that it contains predictable value. */
6366 {
6370 }
6371 }
6376 {
6383 else
6388 }
6391 /* Fall thru */
6397 /* Fall thru */
6400 relax32:
6401 {
6408 /* We're clearing the bits for R_PPC_ADDR16_HA
6409 and R_PPC_ADDR16_LO here. */
6413 /* t0 is HA, t1 is LO */
6420 }
6423 /* Indirect .sdata relocation. */
6426 relocation
6431 /* Indirect .sdata2 relocation. */
6434 relocation
6439 /* Handle the TOC16 reloc. We want to use the offset within the .got
6440 section, not the actual VMA. This is appropriate when generating
6441 an embedded ELF object, for which the .got section acts like the
6442 AIX .toc section. */
6453 /* Relocation is to the entry for this symbol in the
6454 procedure linkage table. */
6455 {
6461 {
6462 /* We didn't make a PLT entry for this symbol. This
6463 happens when statically linking PIC code, or when
6464 using -Bsymbolic. */
6466 }
6473 else
6477 }
6480 /* Relocate against _SDA_BASE_. */
6482 {
6492 {
6496 input_bfd,
6497 sym_name,
6499 name);
6500 }
6505 }
6508 /* Relocate against _SDA2_BASE_. */
6510 {
6518 {
6522 input_bfd,
6523 sym_name,
6525 name);
6530 }
6535 }
6538 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6541 {
6552 {
6558 }
6562 {
6568 }
6572 {
6574 }
6576 else
6577 {
6581 input_bfd,
6582 sym_name,
6584 name);
6589 }
6596 }
6597 }
6600 /* Relocate against the beginning of the section. */
6609 /* Negative relocations. */
6635 input_bfd,
6637 sym_name);
6642 }
6644 /* Do any further special processing. */
6646 {
6657 /* It's just possible that this symbol is a weak symbol
6658 that's not actually defined anywhere. In that case,
6659 'sec' would be NULL, and we should leave the symbol
6660 alone (it will be set to zero elsewhere in the link). */
6663 /* Fall thru */
6671 /* Add 0x10000 if sign bit in 0:15 is set.
6672 Bits 0:15 are not used. */
6675 }
6677 #ifdef DEBUG
6682 sym_name,
6683 r_symndx,
6686 #endif
6691 {
6694 input_bfd,
6695 input_section,
6698 sym_name);
6700 }
6703 input_bfd,
6704 input_section,
6705 contents,
6707 relocation,
6708 addend);
6711 {
6713 {
6719 {
6720 /* Assume this is a call protected by other code that
6721 detect the symbol is undefined. If this is the case,
6722 we can safely ignore the overflow. If not, the
6723 program is hosed anyway, and a little warning isn't
6724 going to help. */
6727 }
6731 sym_name,
6734 input_bfd,
6735 input_section,
6738 }
6739 else
6740 {
6746 }
6747 }
6748 }
6750 #ifdef DEBUG
6752 #endif
6755 }
6756 \f
6757 #define PPC_LO(v) ((v) & 0xffff)
6758 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6759 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6761 /* Finish up dynamic symbol handling. We set the contents of various
6762 dynamic sections here. */
6764 static bfd_boolean
6769 {
6772 bfd_boolean doneone;
6774 #ifdef DEBUG
6777 #endif
6785 {
6787 {
6788 Elf_Internal_Rela rela;
6790 bfd_vma reloc_index;
6794 else
6795 {
6801 }
6803 /* This symbol has an entry in the procedure linkage table.
6804 Set it up. */
6806 {
6807 bfd_vma got_offset;
6810 /* The first three entries in .got.plt are reserved. */
6813 /* Use the right PLT. */
6817 /* Fill in the .plt on VxWorks. */
6819 {
6829 }
6830 else
6831 {
6832 bfd_vma got_loc
6833 = (got_offset
6846 }
6853 /* This instruction is an immediate load. The value loaded is
6854 the byte offset of the R_PPC_JMP_SLOT relocation from the
6855 start of the .rela.plt section. The value is stored in the
6856 low-order 16 bits of the load instruction. */
6857 /* NOTE: It appears that this is now an index rather than a
6858 prescaled offset. */
6862 /* This instruction is a PC-relative branch whose target is
6863 the start of the PLT section. The address of this branch
6864 instruction is 20 bytes beyond the start of this PLT entry.
6865 The address is encoded in bits 6-29, inclusive. The value
6866 stored is right-shifted by two bits, permitting a 26-bit
6867 offset. */
6877 /* Fill in the GOT entry corresponding to this PLT slot with
6878 the address immediately after the the "bctr" instruction
6879 in this PLT entry. */
6886 {
6887 /* Fill in a couple of entries in .rela.plt.unloaded. */
6893 /* Provide the @ha relocation for the first instruction. */
6898 R_PPC_ADDR16_HA);
6903 /* Provide the @l relocation for the second instruction. */
6908 R_PPC_ADDR16_LO);
6913 /* Provide a relocation for the GOT entry corresponding to this
6914 PLT slot. Point it at the middle of the .plt entry. */
6919 R_PPC_ADDR32);
6922 }
6924 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6925 In particular, the offset for the relocation is not the
6926 address of the PLT entry for this function, as specified
6927 by the ABI. Instead, the offset is set to the address of
6928 the GOT slot for this function. See EABI 4.4.4.1. */
6933 }
6934 else
6935 {
6940 {
6941 /* We don't need to fill in the .plt. The ppc dynamic
6942 linker will fill it in. */
6943 }
6944 else
6945 {
6951 }
6952 }
6954 /* Fill in the entry in the .rela.plt section. */
6963 {
6964 /* Mark the symbol as undefined, rather than as defined in
6965 the .plt section. Leave the value alone. */
6967 /* If the symbol is weak, we do need to clear the value.
6968 Otherwise, the PLT entry would provide a definition for
6969 the symbol even if the symbol wasn't defined anywhere,
6970 and so the symbol would never be NULL. */
6973 }
6975 }
6978 {
6979 bfd_vma plt;
6988 {
7003 {
7012 }
7013 else
7014 {
7023 }
7024 }
7025 else
7026 {
7036 /* We only need one non-PIC glink stub. */
7038 }
7039 }
7040 else
7042 }
7045 {
7047 Elf_Internal_Rela rela;
7050 /* This symbols needs a copy reloc. Set it up. */
7052 #ifdef DEBUG
7054 #endif
7060 else
7071 }
7073 #ifdef DEBUG
7075 #endif
7077 /* Mark some specially defined symbols as absolute. */
7086 }
7087 \f
7088 static enum elf_reloc_type_class
7090 {
7092 {
7103 }
7104 }
7105 \f
7106 /* Finish up the dynamic sections. */
7108 static bfd_boolean
7111 {
7115 bfd_vma got;
7118 #ifdef DEBUG
7120 #endif
7127 else
7137 {
7145 {
7146 Elf_Internal_Dyn dyn;
7152 {
7156 else
7176 {
7180 }
7185 }
7188 }
7189 }
7191 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7192 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7194 {
7196 bfd_vma val;
7208 }
7210 /* Fill in the first entry in the VxWorks procedure linkage table. */
7212 {
7213 /* Use the right PLT. */
7219 {
7220 bfd_vma got_value =
7230 }
7231 else
7232 {
7235 }
7244 {
7245 Elf_Internal_Rela rela;
7250 /* Output the @ha relocation for the first instruction. */
7259 /* Output the @l relocation for the second instruction. */
7268 /* Fix up the remaining relocations. They may have the wrong
7269 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7270 in which symbols were output. */
7272 {
7273 Elf_Internal_Rela rel;
7289 }
7290 }
7291 }
7294 {
7297 bfd_vma res0;
7300 /*
7301 * PIC glink code is the following:
7302 *
7303 * # ith PLT code stub.
7304 * addis 11,30,(plt+(i-1)*4-got)@ha
7305 * lwz 11,(plt+(i-1)*4-got)@l(11)
7306 * mtctr 11
7307 * bctr
7308 *
7309 * # A table of branches, one for each plt entry.
7310 * # The idea is that the plt call stub loads ctr (and r11) with these
7311 * # addresses, so (r11 - res_0) gives the plt index * 4.
7312 * res_0: b PLTresolve
7313 * res_1: b PLTresolve
7314 * .
7315 * # Some number of entries towards the end can be nops
7316 * res_n_m3: nop
7317 * res_n_m2: nop
7318 * res_n_m1:
7319 *
7320 * PLTresolve:
7321 * addis 11,11,(1f-res_0)@ha
7322 * mflr 0
7323 * bcl 20,31,1f
7324 * 1: addi 11,11,(1b-res_0)@l
7325 * mflr 12
7326 * mtlr 0
7327 * sub 11,11,12 # r11 = index * 4
7328 * addis 12,12,(got+4-1b)@ha
7329 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7330 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7331 * mtctr 0
7332 * add 0,11,11
7333 * add 11,0,11 # r11 = index * 12 = reloc offset.
7334 * bctr
7335 */
7337 {
7338 ADDIS_11_11,
7339 MFLR_0,
7340 BCL_20_31,
7341 ADDI_11_11,
7342 MFLR_12,
7343 MTLR_0,
7344 SUB_11_11_12,
7345 ADDIS_12_12,
7346 LWZ_0_12,
7347 LWZ_12_12,
7348 MTCTR_0,
7349 ADD_0_11_11,
7350 ADD_11_0_11,
7351 BCTR,
7352 NOP,
7353 NOP
7354 };
7357 {
7358 LIS_12,
7359 ADDIS_11_11,
7360 LWZ_0_12,
7361 ADDI_11_11,
7362 MTCTR_0,
7363 ADD_0_11_11,
7364 LWZ_12_12,
7365 ADD_11_0_11,
7366 BCTR,
7367 NOP,
7368 NOP,
7369 NOP,
7370 NOP,
7371 NOP,
7372 NOP,
7373 NOP
7374 };
7381 /* Build the branch table, one for each plt entry (less one),
7382 and perhaps some padding. */
7388 {
7391 }
7393 {
7396 }
7402 /* Last comes the PLTresolve stub. */
7404 {
7405 bfd_vma bcl;
7408 {
7411 }
7425 {
7430 }
7431 else
7432 {
7437 }
7438 }
7439 else
7440 {
7442 {
7445 }
7455 {
7460 }
7461 else
7462 {
7467 }
7468 }
7469 }
7472 }
7473 \f
7474 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7476 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7478 #define ELF_ARCH bfd_arch_powerpc
7479 #define ELF_MACHINE_CODE EM_PPC
7480 #ifdef __QNXTARGET__
7481 #define ELF_MAXPAGESIZE 0x1000
7482 #else
7483 #define ELF_MAXPAGESIZE 0x10000
7484 #endif
7485 #define ELF_MINPAGESIZE 0x1000
7486 #define ELF_COMMONPAGESIZE 0x1000
7487 #define elf_info_to_howto ppc_elf_info_to_howto
7489 #ifdef EM_CYGNUS_POWERPC
7490 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7491 #endif
7493 #ifdef EM_PPC_OLD
7494 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7495 #endif
7497 #define elf_backend_plt_not_loaded 1
7498 #define elf_backend_can_gc_sections 1
7499 #define elf_backend_can_refcount 1
7500 #define elf_backend_rela_normal 1
7502 #define bfd_elf32_mkobject ppc_elf_mkobject
7503 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7504 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7505 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7506 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7507 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7509 #define elf_backend_object_p ppc_elf_object_p
7510 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7511 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7512 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7513 #define elf_backend_relocate_section ppc_elf_relocate_section
7514 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7515 #define elf_backend_check_relocs ppc_elf_check_relocs
7516 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7517 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7518 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7519 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7520 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7521 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7522 #define elf_backend_fake_sections ppc_elf_fake_sections
7523 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7524 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7525 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7526 #define elf_backend_write_core_note ppc_elf_write_core_note
7527 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7528 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7529 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7530 #define elf_backend_write_section ppc_elf_write_section
7531 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7532 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7533 #define elf_backend_action_discarded ppc_elf_action_discarded
7534 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7538 /* VxWorks Target */
7540 #undef TARGET_LITTLE_SYM
7541 #undef TARGET_LITTLE_NAME
7543 #undef TARGET_BIG_SYM
7544 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7545 #undef TARGET_BIG_NAME
7548 /* VxWorks uses the elf default section flags for .plt. */
7551 {
7559 }
7561 /* Like ppc_elf_link_hash_table_create, but overrides
7562 appropriately for VxWorks. */
7565 {
7570 {
7578 }
7580 }
7582 /* Tweak magic VxWorks symbols as they are loaded. */
7583 static bfd_boolean
7591 {
7593 valp))
7597 }
7599 static void
7601 {
7604 }
7606 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7607 define it. */
7608 #undef elf_backend_want_plt_sym
7609 #define elf_backend_want_plt_sym 1
7610 #undef elf_backend_want_got_plt
7611 #define elf_backend_want_got_plt 1
7612 #undef elf_backend_got_symbol_offset
7613 #define elf_backend_got_symbol_offset 0
7614 #undef elf_backend_plt_not_loaded
7615 #define elf_backend_plt_not_loaded 0
7616 #undef elf_backend_plt_readonly
7617 #define elf_backend_plt_readonly 1
7618 #undef elf_backend_got_header_size
7619 #define elf_backend_got_header_size 12
7621 #undef bfd_elf32_bfd_link_hash_table_create
7622 #define bfd_elf32_bfd_link_hash_table_create \
7623 ppc_elf_vxworks_link_hash_table_create
7624 #undef elf_backend_add_symbol_hook
7625 #define elf_backend_add_symbol_hook \
7626 ppc_elf_vxworks_add_symbol_hook
7627 #undef elf_backend_link_output_symbol_hook
7628 #define elf_backend_link_output_symbol_hook \
7629 elf_vxworks_link_output_symbol_hook
7630 #undef elf_backend_final_write_processing
7631 #define elf_backend_final_write_processing \
7632 ppc_elf_vxworks_final_write_processing
7633 #undef elf_backend_get_sec_type_attr
7634 #define elf_backend_get_sec_type_attr \
7635 ppc_elf_vxworks_get_sec_type_attr
7636 #undef elf_backend_emit_relocs
7637 #define elf_backend_emit_relocs \
7638 elf_vxworks_emit_relocs
7640 #undef elf32_bed
7641 #define elf32_bed ppc_elf_vxworks_bed