8125 lines
239 KiB
C
8125 lines
239 KiB
C
/* AArch64-specific support for NN-bit ELF.
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Copyright (C) 2009-2015 Free Software Foundation, Inc.
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Contributed by ARM Ltd.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING3. If not,
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see <http://www.gnu.org/licenses/>. */
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/* Notes on implementation:
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Thread Local Store (TLS)
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Overview:
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The implementation currently supports both traditional TLS and TLS
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descriptors, but only general dynamic (GD).
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For traditional TLS the assembler will present us with code
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fragments of the form:
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adrp x0, :tlsgd:foo
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R_AARCH64_TLSGD_ADR_PAGE21(foo)
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add x0, :tlsgd_lo12:foo
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R_AARCH64_TLSGD_ADD_LO12_NC(foo)
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bl __tls_get_addr
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nop
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For TLS descriptors the assembler will present us with code
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fragments of the form:
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adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE21(foo)
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ldr x1, [x0, #:tlsdesc_lo12:foo] R_AARCH64_TLSDESC_LD64_LO12(foo)
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add x0, x0, #:tlsdesc_lo12:foo R_AARCH64_TLSDESC_ADD_LO12(foo)
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.tlsdesccall foo
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blr x1 R_AARCH64_TLSDESC_CALL(foo)
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The relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} against foo
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indicate that foo is thread local and should be accessed via the
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traditional TLS mechanims.
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The relocations R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC}
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against foo indicate that 'foo' is thread local and should be accessed
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via a TLS descriptor mechanism.
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The precise instruction sequence is only relevant from the
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perspective of linker relaxation which is currently not implemented.
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The static linker must detect that 'foo' is a TLS object and
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allocate a double GOT entry. The GOT entry must be created for both
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global and local TLS symbols. Note that this is different to none
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TLS local objects which do not need a GOT entry.
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In the traditional TLS mechanism, the double GOT entry is used to
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provide the tls_index structure, containing module and offset
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entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD
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on the module entry. The loader will subsequently fixup this
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relocation with the module identity.
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For global traditional TLS symbols the static linker places an
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R_AARCH64_TLS_DTPREL relocation on the offset entry. The loader
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will subsequently fixup the offset. For local TLS symbols the static
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linker fixes up offset.
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In the TLS descriptor mechanism the double GOT entry is used to
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provide the descriptor. The static linker places the relocation
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R_AARCH64_TLSDESC on the first GOT slot. The loader will
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subsequently fix this up.
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Implementation:
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The handling of TLS symbols is implemented across a number of
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different backend functions. The following is a top level view of
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what processing is performed where.
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The TLS implementation maintains state information for each TLS
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symbol. The state information for local and global symbols is kept
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in different places. Global symbols use generic BFD structures while
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local symbols use backend specific structures that are allocated and
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maintained entirely by the backend.
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The flow:
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elfNN_aarch64_check_relocs()
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This function is invoked for each relocation.
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The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and
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R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} are
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spotted. One time creation of local symbol data structures are
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created when the first local symbol is seen.
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The reference count for a symbol is incremented. The GOT type for
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each symbol is marked as general dynamic.
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elfNN_aarch64_allocate_dynrelocs ()
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For each global with positive reference count we allocate a double
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GOT slot. For a traditional TLS symbol we allocate space for two
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relocation entries on the GOT, for a TLS descriptor symbol we
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allocate space for one relocation on the slot. Record the GOT offset
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for this symbol.
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elfNN_aarch64_size_dynamic_sections ()
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Iterate all input BFDS, look for in the local symbol data structure
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constructed earlier for local TLS symbols and allocate them double
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GOT slots along with space for a single GOT relocation. Update the
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local symbol structure to record the GOT offset allocated.
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elfNN_aarch64_relocate_section ()
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Calls elfNN_aarch64_final_link_relocate ()
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Emit the relevant TLS relocations against the GOT for each TLS
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symbol. For local TLS symbols emit the GOT offset directly. The GOT
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relocations are emitted once the first time a TLS symbol is
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encountered. The implementation uses the LSB of the GOT offset to
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flag that the relevant GOT relocations for a symbol have been
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emitted. All of the TLS code that uses the GOT offset needs to take
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care to mask out this flag bit before using the offset.
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elfNN_aarch64_final_link_relocate ()
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Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libiberty.h"
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#include "libbfd.h"
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#include "bfd_stdint.h"
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#include "elf-bfd.h"
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#include "bfdlink.h"
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#include "objalloc.h"
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#include "elf/aarch64.h"
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#include "elfxx-aarch64.h"
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#define ARCH_SIZE NN
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#if ARCH_SIZE == 64
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#define AARCH64_R(NAME) R_AARCH64_ ## NAME
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#define AARCH64_R_STR(NAME) "R_AARCH64_" #NAME
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#define HOWTO64(...) HOWTO (__VA_ARGS__)
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#define HOWTO32(...) EMPTY_HOWTO (0)
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#define LOG_FILE_ALIGN 3
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#endif
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#if ARCH_SIZE == 32
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#define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
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#define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME
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#define HOWTO64(...) EMPTY_HOWTO (0)
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#define HOWTO32(...) HOWTO (__VA_ARGS__)
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#define LOG_FILE_ALIGN 2
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#endif
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#define IS_AARCH64_TLS_RELOC(R_TYPE) \
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((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
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|| IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
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#define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
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((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
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|| (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC)
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#define ELIMINATE_COPY_RELOCS 0
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/* Return size of a relocation entry. HTAB is the bfd's
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elf_aarch64_link_hash_entry. */
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#define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
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/* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
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#define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
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#define PLT_ENTRY_SIZE (32)
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#define PLT_SMALL_ENTRY_SIZE (16)
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#define PLT_TLSDESC_ENTRY_SIZE (32)
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/* Encoding of the nop instruction */
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#define INSN_NOP 0xd503201f
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#define aarch64_compute_jump_table_size(htab) \
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(((htab)->root.srelplt == NULL) ? 0 \
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: (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
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/* The first entry in a procedure linkage table looks like this
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if the distance between the PLTGOT and the PLT is < 4GB use
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these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
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in x16 and needs to work out PLTGOT[1] by using an address of
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[x16,#-GOT_ENTRY_SIZE]. */
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static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] =
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{
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0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
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0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
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#if ARCH_SIZE == 64
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0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
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0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
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#else
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0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
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0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
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#endif
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0x20, 0x02, 0x1f, 0xd6, /* br x17 */
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0x1f, 0x20, 0x03, 0xd5, /* nop */
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0x1f, 0x20, 0x03, 0xd5, /* nop */
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0x1f, 0x20, 0x03, 0xd5, /* nop */
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};
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/* Per function entry in a procedure linkage table looks like this
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if the distance between the PLTGOT and the PLT is < 4GB use
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these PLT entries. */
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static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] =
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{
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0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
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#if ARCH_SIZE == 64
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0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
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0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
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#else
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0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
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0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
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#endif
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0x20, 0x02, 0x1f, 0xd6, /* br x17. */
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};
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static const bfd_byte
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elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
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{
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0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
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0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
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0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
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#if ARCH_SIZE == 64
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0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
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0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
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#else
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0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
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0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
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#endif
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0x40, 0x00, 0x1f, 0xd6, /* br x2 */
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0x1f, 0x20, 0x03, 0xd5, /* nop */
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0x1f, 0x20, 0x03, 0xd5, /* nop */
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};
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#define elf_info_to_howto elfNN_aarch64_info_to_howto
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#define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
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#define AARCH64_ELF_ABI_VERSION 0
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/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
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#define ALL_ONES (~ (bfd_vma) 0)
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/* Indexed by the bfd interal reloc enumerators.
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Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
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in reloc.c. */
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static reloc_howto_type elfNN_aarch64_howto_table[] =
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{
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EMPTY_HOWTO (0),
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/* Basic data relocations. */
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#if ARCH_SIZE == 64
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HOWTO (R_AARCH64_NULL, /* type */
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0, /* rightshift */
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3, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_AARCH64_NULL", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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#else
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HOWTO (R_AARCH64_NONE, /* type */
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0, /* rightshift */
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3, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_AARCH64_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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#endif
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/* .xword: (S+A) */
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HOWTO64 (AARCH64_R (ABS64), /* type */
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0, /* rightshift */
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4, /* size (4 = long long) */
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64, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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AARCH64_R_STR (ABS64), /* name */
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FALSE, /* partial_inplace */
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ALL_ONES, /* src_mask */
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ALL_ONES, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* .word: (S+A) */
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HOWTO (AARCH64_R (ABS32), /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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AARCH64_R_STR (ABS32), /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* .half: (S+A) */
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HOWTO (AARCH64_R (ABS16), /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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AARCH64_R_STR (ABS16), /* name */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* .xword: (S+A-P) */
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HOWTO64 (AARCH64_R (PREL64), /* type */
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0, /* rightshift */
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4, /* size (4 = long long) */
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64, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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AARCH64_R_STR (PREL64), /* name */
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FALSE, /* partial_inplace */
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ALL_ONES, /* src_mask */
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ALL_ONES, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* .word: (S+A-P) */
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HOWTO (AARCH64_R (PREL32), /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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AARCH64_R_STR (PREL32), /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* .half: (S+A-P) */
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HOWTO (AARCH64_R (PREL16), /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (PREL16), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* Group relocations to create a 16, 32, 48 or 64 bit
|
|
unsigned data or abs address inline. */
|
|
|
|
/* MOVZ: ((S+A) >> 0) & 0xffff */
|
|
HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_UABS_G0), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
|
|
HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* MOVZ: ((S+A) >> 16) & 0xffff */
|
|
HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
|
|
16, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_UABS_G1), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
|
|
HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
|
|
16, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* MOVZ: ((S+A) >> 32) & 0xffff */
|
|
HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
|
|
32, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_UABS_G2), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
|
|
HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
|
|
32, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* MOVZ: ((S+A) >> 48) & 0xffff */
|
|
HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
|
|
48, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_UABS_G3), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Group relocations to create high part of a 16, 32, 48 or 64 bit
|
|
signed data or abs address inline. Will change instruction
|
|
to MOVN or MOVZ depending on sign of calculated value. */
|
|
|
|
/* MOV[ZN]: ((S+A) >> 0) & 0xffff */
|
|
HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_SABS_G0), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* MOV[ZN]: ((S+A) >> 16) & 0xffff */
|
|
HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
|
|
16, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_SABS_G1), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* MOV[ZN]: ((S+A) >> 32) & 0xffff */
|
|
HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
|
|
32, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (MOVW_SABS_G2), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Relocations to generate 19, 21 and 33 bit PC-relative load/store
|
|
addresses: PG(x) is (x & ~0xfff). */
|
|
|
|
/* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
|
|
HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
19, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (LD_PREL_LO19), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x7ffff, /* src_mask */
|
|
0x7ffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* ADR: (S+A-P) & 0x1fffff */
|
|
HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
21, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (ADR_PREL_LO21), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1fffff, /* src_mask */
|
|
0x1fffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
|
|
HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
|
|
12, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
21, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1fffff, /* src_mask */
|
|
0x1fffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
|
|
HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
|
|
12, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
21, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1fffff, /* src_mask */
|
|
0x1fffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* ADD: (S+A) & 0xfff [no overflow check] */
|
|
HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
10, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x3ffc00, /* src_mask */
|
|
0x3ffc00, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* LD/ST8: (S+A) & 0xfff */
|
|
HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xfff, /* src_mask */
|
|
0xfff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Relocations for control-flow instructions. */
|
|
|
|
/* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
|
|
HOWTO (AARCH64_R (TSTBR14), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
14, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TSTBR14), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x3fff, /* src_mask */
|
|
0x3fff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* B.cond: ((S+A-P) >> 2) & 0x7ffff */
|
|
HOWTO (AARCH64_R (CONDBR19), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
19, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (CONDBR19), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x7ffff, /* src_mask */
|
|
0x7ffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* B: ((S+A-P) >> 2) & 0x3ffffff */
|
|
HOWTO (AARCH64_R (JUMP26), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
26, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (JUMP26), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x3ffffff, /* src_mask */
|
|
0x3ffffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* BL: ((S+A-P) >> 2) & 0x3ffffff */
|
|
HOWTO (AARCH64_R (CALL26), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
26, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (CALL26), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x3ffffff, /* src_mask */
|
|
0x3ffffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* LD/ST16: (S+A) & 0xffe */
|
|
HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
|
|
1, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffe, /* src_mask */
|
|
0xffe, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* LD/ST32: (S+A) & 0xffc */
|
|
HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffc, /* src_mask */
|
|
0xffc, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* LD/ST64: (S+A) & 0xff8 */
|
|
HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
|
|
3, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xff8, /* src_mask */
|
|
0xff8, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* LD/ST128: (S+A) & 0xff0 */
|
|
HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
|
|
4, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xff0, /* src_mask */
|
|
0xff0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Set a load-literal immediate field to bits
|
|
0x1FFFFC of G(S)-P */
|
|
HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte,1 = short,2 = long) */
|
|
19, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (GOT_LD_PREL19), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffe0, /* src_mask */
|
|
0xffffe0, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* Get to the page for the GOT entry for the symbol
|
|
(G(S) - P) using an ADRP instruction. */
|
|
HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */
|
|
12, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
21, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (ADR_GOT_PAGE), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1fffff, /* src_mask */
|
|
0x1fffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* LD64: GOT offset G(S) & 0xff8 */
|
|
HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
|
|
3, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xff8, /* src_mask */
|
|
0xff8, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* LD32: GOT offset G(S) & 0xffc */
|
|
HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffc, /* src_mask */
|
|
0xffc, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* Get to the page for the GOT entry for the symbol
|
|
(G(S) - P) using an ADRP instruction. */
|
|
HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */
|
|
12, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
21, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1fffff, /* src_mask */
|
|
0x1fffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
21, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSGD_ADR_PREL21), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1fffff, /* src_mask */
|
|
0x1fffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
|
|
HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xfff, /* src_mask */
|
|
0xfff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
|
|
16, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
|
|
12, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
21, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1fffff, /* src_mask */
|
|
0x1fffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
|
|
3, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xff8, /* src_mask */
|
|
0xff8, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffc, /* src_mask */
|
|
0xffc, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
19, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1ffffc, /* src_mask */
|
|
0x1ffffc, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
|
|
32, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
|
|
16, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
|
|
16, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
|
|
12, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_unsigned, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xfff, /* src_mask */
|
|
0xfff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xfff, /* src_mask */
|
|
0xfff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xfff, /* src_mask */
|
|
0xfff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
19, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0ffffe0, /* src_mask */
|
|
0x0ffffe0, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
21, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1fffff, /* src_mask */
|
|
0x1fffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* Get to the page for the GOT entry for the symbol
|
|
(G(S) - P) using an ADRP instruction. */
|
|
HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */
|
|
12, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
21, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x1fffff, /* src_mask */
|
|
0x1fffff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* LD64: GOT offset G(S) & 0xff8. */
|
|
HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */
|
|
3, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xff8, /* src_mask */
|
|
0xff8, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* LD32: GOT offset G(S) & 0xffc. */
|
|
HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
|
|
2, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffc, /* src_mask */
|
|
0xffc, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
/* ADD: GOT offset G(S) & 0xfff. */
|
|
HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xfff, /* src_mask */
|
|
0xfff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
|
|
16, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_OFF_G1), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_LDR), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0, /* src_mask */
|
|
0x0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
12, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_ADD), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0, /* src_mask */
|
|
0x0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC_CALL), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x0, /* src_mask */
|
|
0x0, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (COPY), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (COPY), /* name */
|
|
TRUE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (GLOB_DAT), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (GLOB_DAT), /* name */
|
|
TRUE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (JUMP_SLOT), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (JUMP_SLOT), /* name */
|
|
TRUE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (RELATIVE), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (RELATIVE), /* name */
|
|
TRUE, /* partial_inplace */
|
|
ALL_ONES, /* src_mask */
|
|
ALL_ONES, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
#if ARCH_SIZE == 64
|
|
AARCH64_R_STR (TLS_DTPMOD64), /* name */
|
|
#else
|
|
AARCH64_R_STR (TLS_DTPMOD), /* name */
|
|
#endif
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ALL_ONES, /* dst_mask */
|
|
FALSE), /* pc_reloffset */
|
|
|
|
HOWTO (AARCH64_R (TLS_DTPREL), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
#if ARCH_SIZE == 64
|
|
AARCH64_R_STR (TLS_DTPREL64), /* name */
|
|
#else
|
|
AARCH64_R_STR (TLS_DTPREL), /* name */
|
|
#endif
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ALL_ONES, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLS_TPREL), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
#if ARCH_SIZE == 64
|
|
AARCH64_R_STR (TLS_TPREL64), /* name */
|
|
#else
|
|
AARCH64_R_STR (TLS_TPREL), /* name */
|
|
#endif
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ALL_ONES, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (TLSDESC), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (TLSDESC), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ALL_ONES, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (AARCH64_R (IRELATIVE), /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
64, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
AARCH64_R_STR (IRELATIVE), /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
ALL_ONES, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
EMPTY_HOWTO (0),
|
|
};
|
|
|
|
static reloc_howto_type elfNN_aarch64_howto_none =
|
|
HOWTO (R_AARCH64_NONE, /* type */
|
|
0, /* rightshift */
|
|
3, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_AARCH64_NONE", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
FALSE); /* pcrel_offset */
|
|
|
|
/* Given HOWTO, return the bfd internal relocation enumerator. */
|
|
|
|
static bfd_reloc_code_real_type
|
|
elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
|
|
{
|
|
const int size
|
|
= (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
|
|
const ptrdiff_t offset
|
|
= howto - elfNN_aarch64_howto_table;
|
|
|
|
if (offset > 0 && offset < size - 1)
|
|
return BFD_RELOC_AARCH64_RELOC_START + offset;
|
|
|
|
if (howto == &elfNN_aarch64_howto_none)
|
|
return BFD_RELOC_AARCH64_NONE;
|
|
|
|
return BFD_RELOC_AARCH64_RELOC_START;
|
|
}
|
|
|
|
/* Given R_TYPE, return the bfd internal relocation enumerator. */
|
|
|
|
static bfd_reloc_code_real_type
|
|
elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type)
|
|
{
|
|
static bfd_boolean initialized_p = FALSE;
|
|
/* Indexed by R_TYPE, values are offsets in the howto_table. */
|
|
static unsigned int offsets[R_AARCH64_end];
|
|
|
|
if (initialized_p == FALSE)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
|
|
if (elfNN_aarch64_howto_table[i].type != 0)
|
|
offsets[elfNN_aarch64_howto_table[i].type] = i;
|
|
|
|
initialized_p = TRUE;
|
|
}
|
|
|
|
if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
|
|
return BFD_RELOC_AARCH64_NONE;
|
|
|
|
/* PR 17512: file: b371e70a. */
|
|
if (r_type >= R_AARCH64_end)
|
|
{
|
|
_bfd_error_handler (_("Invalid AArch64 reloc number: %d"), r_type);
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return BFD_RELOC_AARCH64_NONE;
|
|
}
|
|
|
|
return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
|
|
}
|
|
|
|
struct elf_aarch64_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type from;
|
|
bfd_reloc_code_real_type to;
|
|
};
|
|
|
|
/* Map bfd generic reloc to AArch64-specific reloc. */
|
|
static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
|
|
{
|
|
{BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
|
|
|
|
/* Basic data relocations. */
|
|
{BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN},
|
|
{BFD_RELOC_64, BFD_RELOC_AARCH64_64},
|
|
{BFD_RELOC_32, BFD_RELOC_AARCH64_32},
|
|
{BFD_RELOC_16, BFD_RELOC_AARCH64_16},
|
|
{BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL},
|
|
{BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL},
|
|
{BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL},
|
|
};
|
|
|
|
/* Given the bfd internal relocation enumerator in CODE, return the
|
|
corresponding howto entry. */
|
|
|
|
static reloc_howto_type *
|
|
elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
|
|
{
|
|
unsigned int i;
|
|
|
|
/* Convert bfd generic reloc to AArch64-specific reloc. */
|
|
if (code < BFD_RELOC_AARCH64_RELOC_START
|
|
|| code > BFD_RELOC_AARCH64_RELOC_END)
|
|
for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++)
|
|
if (elf_aarch64_reloc_map[i].from == code)
|
|
{
|
|
code = elf_aarch64_reloc_map[i].to;
|
|
break;
|
|
}
|
|
|
|
if (code > BFD_RELOC_AARCH64_RELOC_START
|
|
&& code < BFD_RELOC_AARCH64_RELOC_END)
|
|
if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type)
|
|
return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START];
|
|
|
|
if (code == BFD_RELOC_AARCH64_NONE)
|
|
return &elfNN_aarch64_howto_none;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
elfNN_aarch64_howto_from_type (unsigned int r_type)
|
|
{
|
|
bfd_reloc_code_real_type val;
|
|
reloc_howto_type *howto;
|
|
|
|
#if ARCH_SIZE == 32
|
|
if (r_type > 256)
|
|
{
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
if (r_type == R_AARCH64_NONE)
|
|
return &elfNN_aarch64_howto_none;
|
|
|
|
val = elfNN_aarch64_bfd_reloc_from_type (r_type);
|
|
howto = elfNN_aarch64_howto_from_bfd_reloc (val);
|
|
|
|
if (howto != NULL)
|
|
return howto;
|
|
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
|
|
Elf_Internal_Rela *elf_reloc)
|
|
{
|
|
unsigned int r_type;
|
|
|
|
r_type = ELFNN_R_TYPE (elf_reloc->r_info);
|
|
bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type);
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
bfd_reloc_code_real_type code)
|
|
{
|
|
reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
|
|
|
|
if (howto != NULL)
|
|
return howto;
|
|
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return NULL;
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
const char *r_name)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
|
|
if (elfNN_aarch64_howto_table[i].name != NULL
|
|
&& strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0)
|
|
return &elfNN_aarch64_howto_table[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
|
|
#define TARGET_LITTLE_NAME "elfNN-littleaarch64"
|
|
#define TARGET_BIG_SYM aarch64_elfNN_be_vec
|
|
#define TARGET_BIG_NAME "elfNN-bigaarch64"
|
|
|
|
/* The linker script knows the section names for placement.
|
|
The entry_names are used to do simple name mangling on the stubs.
|
|
Given a function name, and its type, the stub can be found. The
|
|
name can be changed. The only requirement is the %s be present. */
|
|
#define STUB_ENTRY_NAME "__%s_veneer"
|
|
|
|
/* The name of the dynamic interpreter. This is put in the .interp
|
|
section. */
|
|
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
|
|
|
|
#define AARCH64_MAX_FWD_BRANCH_OFFSET \
|
|
(((1 << 25) - 1) << 2)
|
|
#define AARCH64_MAX_BWD_BRANCH_OFFSET \
|
|
(-((1 << 25) << 2))
|
|
|
|
#define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
|
|
#define AARCH64_MIN_ADRP_IMM (-(1 << 20))
|
|
|
|
static int
|
|
aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
|
|
{
|
|
bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12;
|
|
return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM;
|
|
}
|
|
|
|
static int
|
|
aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
|
|
{
|
|
bfd_signed_vma offset = (bfd_signed_vma) (value - place);
|
|
return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET
|
|
&& offset >= AARCH64_MAX_BWD_BRANCH_OFFSET);
|
|
}
|
|
|
|
static const uint32_t aarch64_adrp_branch_stub [] =
|
|
{
|
|
0x90000010, /* adrp ip0, X */
|
|
/* R_AARCH64_ADR_HI21_PCREL(X) */
|
|
0x91000210, /* add ip0, ip0, :lo12:X */
|
|
/* R_AARCH64_ADD_ABS_LO12_NC(X) */
|
|
0xd61f0200, /* br ip0 */
|
|
};
|
|
|
|
static const uint32_t aarch64_long_branch_stub[] =
|
|
{
|
|
#if ARCH_SIZE == 64
|
|
0x58000090, /* ldr ip0, 1f */
|
|
#else
|
|
0x18000090, /* ldr wip0, 1f */
|
|
#endif
|
|
0x10000011, /* adr ip1, #0 */
|
|
0x8b110210, /* add ip0, ip0, ip1 */
|
|
0xd61f0200, /* br ip0 */
|
|
0x00000000, /* 1: .xword or .word
|
|
R_AARCH64_PRELNN(X) + 12
|
|
*/
|
|
0x00000000,
|
|
};
|
|
|
|
static const uint32_t aarch64_erratum_835769_stub[] =
|
|
{
|
|
0x00000000, /* Placeholder for multiply accumulate. */
|
|
0x14000000, /* b <label> */
|
|
};
|
|
|
|
/* Section name for stubs is the associated section name plus this
|
|
string. */
|
|
#define STUB_SUFFIX ".stub"
|
|
|
|
enum elf_aarch64_stub_type
|
|
{
|
|
aarch64_stub_none,
|
|
aarch64_stub_adrp_branch,
|
|
aarch64_stub_long_branch,
|
|
aarch64_stub_erratum_835769_veneer,
|
|
};
|
|
|
|
struct elf_aarch64_stub_hash_entry
|
|
{
|
|
/* Base hash table entry structure. */
|
|
struct bfd_hash_entry root;
|
|
|
|
/* The stub section. */
|
|
asection *stub_sec;
|
|
|
|
/* Offset within stub_sec of the beginning of this stub. */
|
|
bfd_vma stub_offset;
|
|
|
|
/* Given the symbol's value and its section we can determine its final
|
|
value when building the stubs (so the stub knows where to jump). */
|
|
bfd_vma target_value;
|
|
asection *target_section;
|
|
|
|
enum elf_aarch64_stub_type stub_type;
|
|
|
|
/* The symbol table entry, if any, that this was derived from. */
|
|
struct elf_aarch64_link_hash_entry *h;
|
|
|
|
/* Destination symbol type */
|
|
unsigned char st_type;
|
|
|
|
/* Where this stub is being called from, or, in the case of combined
|
|
stub sections, the first input section in the group. */
|
|
asection *id_sec;
|
|
|
|
/* The name for the local symbol at the start of this stub. The
|
|
stub name in the hash table has to be unique; this does not, so
|
|
it can be friendlier. */
|
|
char *output_name;
|
|
|
|
/* The instruction which caused this stub to be generated (only valid for
|
|
erratum 835769 workaround stubs at present). */
|
|
uint32_t veneered_insn;
|
|
};
|
|
|
|
/* Used to build a map of a section. This is required for mixed-endian
|
|
code/data. */
|
|
|
|
typedef struct elf_elf_section_map
|
|
{
|
|
bfd_vma vma;
|
|
char type;
|
|
}
|
|
elf_aarch64_section_map;
|
|
|
|
|
|
typedef struct _aarch64_elf_section_data
|
|
{
|
|
struct bfd_elf_section_data elf;
|
|
unsigned int mapcount;
|
|
unsigned int mapsize;
|
|
elf_aarch64_section_map *map;
|
|
}
|
|
_aarch64_elf_section_data;
|
|
|
|
#define elf_aarch64_section_data(sec) \
|
|
((_aarch64_elf_section_data *) elf_section_data (sec))
|
|
|
|
/* A fix-descriptor for erratum 835769. */
|
|
struct aarch64_erratum_835769_fix
|
|
{
|
|
bfd *input_bfd;
|
|
asection *section;
|
|
bfd_vma offset;
|
|
uint32_t veneered_insn;
|
|
char *stub_name;
|
|
enum elf_aarch64_stub_type stub_type;
|
|
};
|
|
|
|
/* The size of the thread control block which is defined to be two pointers. */
|
|
#define TCB_SIZE (ARCH_SIZE/8)*2
|
|
|
|
struct elf_aarch64_local_symbol
|
|
{
|
|
unsigned int got_type;
|
|
bfd_signed_vma got_refcount;
|
|
bfd_vma got_offset;
|
|
|
|
/* Offset of the GOTPLT entry reserved for the TLS descriptor. The
|
|
offset is from the end of the jump table and reserved entries
|
|
within the PLTGOT.
|
|
|
|
The magic value (bfd_vma) -1 indicates that an offset has not be
|
|
allocated. */
|
|
bfd_vma tlsdesc_got_jump_table_offset;
|
|
};
|
|
|
|
struct elf_aarch64_obj_tdata
|
|
{
|
|
struct elf_obj_tdata root;
|
|
|
|
/* local symbol descriptors */
|
|
struct elf_aarch64_local_symbol *locals;
|
|
|
|
/* Zero to warn when linking objects with incompatible enum sizes. */
|
|
int no_enum_size_warning;
|
|
|
|
/* Zero to warn when linking objects with incompatible wchar_t sizes. */
|
|
int no_wchar_size_warning;
|
|
};
|
|
|
|
#define elf_aarch64_tdata(bfd) \
|
|
((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
|
|
|
|
#define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
|
|
|
|
#define is_aarch64_elf(bfd) \
|
|
(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
|
|
&& elf_tdata (bfd) != NULL \
|
|
&& elf_object_id (bfd) == AARCH64_ELF_DATA)
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_mkobject (bfd *abfd)
|
|
{
|
|
return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
|
|
AARCH64_ELF_DATA);
|
|
}
|
|
|
|
#define elf_aarch64_hash_entry(ent) \
|
|
((struct elf_aarch64_link_hash_entry *)(ent))
|
|
|
|
#define GOT_UNKNOWN 0
|
|
#define GOT_NORMAL 1
|
|
#define GOT_TLS_GD 2
|
|
#define GOT_TLS_IE 4
|
|
#define GOT_TLSDESC_GD 8
|
|
|
|
#define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
|
|
|
|
/* AArch64 ELF linker hash entry. */
|
|
struct elf_aarch64_link_hash_entry
|
|
{
|
|
struct elf_link_hash_entry root;
|
|
|
|
/* Track dynamic relocs copied for this symbol. */
|
|
struct elf_dyn_relocs *dyn_relocs;
|
|
|
|
/* Since PLT entries have variable size, we need to record the
|
|
index into .got.plt instead of recomputing it from the PLT
|
|
offset. */
|
|
bfd_signed_vma plt_got_offset;
|
|
|
|
/* Bit mask representing the type of GOT entry(s) if any required by
|
|
this symbol. */
|
|
unsigned int got_type;
|
|
|
|
/* A pointer to the most recently used stub hash entry against this
|
|
symbol. */
|
|
struct elf_aarch64_stub_hash_entry *stub_cache;
|
|
|
|
/* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
|
|
is from the end of the jump table and reserved entries within the PLTGOT.
|
|
|
|
The magic value (bfd_vma) -1 indicates that an offset has not
|
|
be allocated. */
|
|
bfd_vma tlsdesc_got_jump_table_offset;
|
|
};
|
|
|
|
static unsigned int
|
|
elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
|
|
bfd *abfd,
|
|
unsigned long r_symndx)
|
|
{
|
|
if (h)
|
|
return elf_aarch64_hash_entry (h)->got_type;
|
|
|
|
if (! elf_aarch64_locals (abfd))
|
|
return GOT_UNKNOWN;
|
|
|
|
return elf_aarch64_locals (abfd)[r_symndx].got_type;
|
|
}
|
|
|
|
/* Get the AArch64 elf linker hash table from a link_info structure. */
|
|
#define elf_aarch64_hash_table(info) \
|
|
((struct elf_aarch64_link_hash_table *) ((info)->hash))
|
|
|
|
#define aarch64_stub_hash_lookup(table, string, create, copy) \
|
|
((struct elf_aarch64_stub_hash_entry *) \
|
|
bfd_hash_lookup ((table), (string), (create), (copy)))
|
|
|
|
/* AArch64 ELF linker hash table. */
|
|
struct elf_aarch64_link_hash_table
|
|
{
|
|
/* The main hash table. */
|
|
struct elf_link_hash_table root;
|
|
|
|
/* Nonzero to force PIC branch veneers. */
|
|
int pic_veneer;
|
|
|
|
/* Fix erratum 835769. */
|
|
int fix_erratum_835769;
|
|
|
|
/* A table of fix locations for erratum 835769. This holds erratum
|
|
fix locations between elfNN_aarch64_size_stubs() and
|
|
elfNN_aarch64_write_section(). */
|
|
struct aarch64_erratum_835769_fix *aarch64_erratum_835769_fixes;
|
|
unsigned int num_aarch64_erratum_835769_fixes;
|
|
|
|
/* The number of bytes in the initial entry in the PLT. */
|
|
bfd_size_type plt_header_size;
|
|
|
|
/* The number of bytes in the subsequent PLT etries. */
|
|
bfd_size_type plt_entry_size;
|
|
|
|
/* Short-cuts to get to dynamic linker sections. */
|
|
asection *sdynbss;
|
|
asection *srelbss;
|
|
|
|
/* Small local sym cache. */
|
|
struct sym_cache sym_cache;
|
|
|
|
/* For convenience in allocate_dynrelocs. */
|
|
bfd *obfd;
|
|
|
|
/* The amount of space used by the reserved portion of the sgotplt
|
|
section, plus whatever space is used by the jump slots. */
|
|
bfd_vma sgotplt_jump_table_size;
|
|
|
|
/* The stub hash table. */
|
|
struct bfd_hash_table stub_hash_table;
|
|
|
|
/* Linker stub bfd. */
|
|
bfd *stub_bfd;
|
|
|
|
/* Linker call-backs. */
|
|
asection *(*add_stub_section) (const char *, asection *);
|
|
void (*layout_sections_again) (void);
|
|
|
|
/* Array to keep track of which stub sections have been created, and
|
|
information on stub grouping. */
|
|
struct map_stub
|
|
{
|
|
/* This is the section to which stubs in the group will be
|
|
attached. */
|
|
asection *link_sec;
|
|
/* The stub section. */
|
|
asection *stub_sec;
|
|
} *stub_group;
|
|
|
|
/* Assorted information used by elfNN_aarch64_size_stubs. */
|
|
unsigned int bfd_count;
|
|
int top_index;
|
|
asection **input_list;
|
|
|
|
/* The offset into splt of the PLT entry for the TLS descriptor
|
|
resolver. Special values are 0, if not necessary (or not found
|
|
to be necessary yet), and -1 if needed but not determined
|
|
yet. */
|
|
bfd_vma tlsdesc_plt;
|
|
|
|
/* The GOT offset for the lazy trampoline. Communicated to the
|
|
loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
|
|
indicates an offset is not allocated. */
|
|
bfd_vma dt_tlsdesc_got;
|
|
|
|
/* Used by local STT_GNU_IFUNC symbols. */
|
|
htab_t loc_hash_table;
|
|
void * loc_hash_memory;
|
|
};
|
|
|
|
/* Create an entry in an AArch64 ELF linker hash table. */
|
|
|
|
static struct bfd_hash_entry *
|
|
elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
|
|
struct bfd_hash_table *table,
|
|
const char *string)
|
|
{
|
|
struct elf_aarch64_link_hash_entry *ret =
|
|
(struct elf_aarch64_link_hash_entry *) entry;
|
|
|
|
/* Allocate the structure if it has not already been allocated by a
|
|
subclass. */
|
|
if (ret == NULL)
|
|
ret = bfd_hash_allocate (table,
|
|
sizeof (struct elf_aarch64_link_hash_entry));
|
|
if (ret == NULL)
|
|
return (struct bfd_hash_entry *) ret;
|
|
|
|
/* Call the allocation method of the superclass. */
|
|
ret = ((struct elf_aarch64_link_hash_entry *)
|
|
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
|
table, string));
|
|
if (ret != NULL)
|
|
{
|
|
ret->dyn_relocs = NULL;
|
|
ret->got_type = GOT_UNKNOWN;
|
|
ret->plt_got_offset = (bfd_vma) - 1;
|
|
ret->stub_cache = NULL;
|
|
ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
|
|
}
|
|
|
|
return (struct bfd_hash_entry *) ret;
|
|
}
|
|
|
|
/* Initialize an entry in the stub hash table. */
|
|
|
|
static struct bfd_hash_entry *
|
|
stub_hash_newfunc (struct bfd_hash_entry *entry,
|
|
struct bfd_hash_table *table, const char *string)
|
|
{
|
|
/* Allocate the structure if it has not already been allocated by a
|
|
subclass. */
|
|
if (entry == NULL)
|
|
{
|
|
entry = bfd_hash_allocate (table,
|
|
sizeof (struct
|
|
elf_aarch64_stub_hash_entry));
|
|
if (entry == NULL)
|
|
return entry;
|
|
}
|
|
|
|
/* Call the allocation method of the superclass. */
|
|
entry = bfd_hash_newfunc (entry, table, string);
|
|
if (entry != NULL)
|
|
{
|
|
struct elf_aarch64_stub_hash_entry *eh;
|
|
|
|
/* Initialize the local fields. */
|
|
eh = (struct elf_aarch64_stub_hash_entry *) entry;
|
|
eh->stub_sec = NULL;
|
|
eh->stub_offset = 0;
|
|
eh->target_value = 0;
|
|
eh->target_section = NULL;
|
|
eh->stub_type = aarch64_stub_none;
|
|
eh->h = NULL;
|
|
eh->id_sec = NULL;
|
|
}
|
|
|
|
return entry;
|
|
}
|
|
|
|
/* Compute a hash of a local hash entry. We use elf_link_hash_entry
|
|
for local symbol so that we can handle local STT_GNU_IFUNC symbols
|
|
as global symbol. We reuse indx and dynstr_index for local symbol
|
|
hash since they aren't used by global symbols in this backend. */
|
|
|
|
static hashval_t
|
|
elfNN_aarch64_local_htab_hash (const void *ptr)
|
|
{
|
|
struct elf_link_hash_entry *h
|
|
= (struct elf_link_hash_entry *) ptr;
|
|
return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
|
|
}
|
|
|
|
/* Compare local hash entries. */
|
|
|
|
static int
|
|
elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
|
|
{
|
|
struct elf_link_hash_entry *h1
|
|
= (struct elf_link_hash_entry *) ptr1;
|
|
struct elf_link_hash_entry *h2
|
|
= (struct elf_link_hash_entry *) ptr2;
|
|
|
|
return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
|
|
}
|
|
|
|
/* Find and/or create a hash entry for local symbol. */
|
|
|
|
static struct elf_link_hash_entry *
|
|
elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab,
|
|
bfd *abfd, const Elf_Internal_Rela *rel,
|
|
bfd_boolean create)
|
|
{
|
|
struct elf_aarch64_link_hash_entry e, *ret;
|
|
asection *sec = abfd->sections;
|
|
hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
|
|
ELFNN_R_SYM (rel->r_info));
|
|
void **slot;
|
|
|
|
e.root.indx = sec->id;
|
|
e.root.dynstr_index = ELFNN_R_SYM (rel->r_info);
|
|
slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
|
|
create ? INSERT : NO_INSERT);
|
|
|
|
if (!slot)
|
|
return NULL;
|
|
|
|
if (*slot)
|
|
{
|
|
ret = (struct elf_aarch64_link_hash_entry *) *slot;
|
|
return &ret->root;
|
|
}
|
|
|
|
ret = (struct elf_aarch64_link_hash_entry *)
|
|
objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
|
|
sizeof (struct elf_aarch64_link_hash_entry));
|
|
if (ret)
|
|
{
|
|
memset (ret, 0, sizeof (*ret));
|
|
ret->root.indx = sec->id;
|
|
ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info);
|
|
ret->root.dynindx = -1;
|
|
*slot = ret;
|
|
}
|
|
return &ret->root;
|
|
}
|
|
|
|
/* Copy the extra info we tack onto an elf_link_hash_entry. */
|
|
|
|
static void
|
|
elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *dir,
|
|
struct elf_link_hash_entry *ind)
|
|
{
|
|
struct elf_aarch64_link_hash_entry *edir, *eind;
|
|
|
|
edir = (struct elf_aarch64_link_hash_entry *) dir;
|
|
eind = (struct elf_aarch64_link_hash_entry *) ind;
|
|
|
|
if (eind->dyn_relocs != NULL)
|
|
{
|
|
if (edir->dyn_relocs != NULL)
|
|
{
|
|
struct elf_dyn_relocs **pp;
|
|
struct elf_dyn_relocs *p;
|
|
|
|
/* Add reloc counts against the indirect sym to the direct sym
|
|
list. Merge any entries against the same section. */
|
|
for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
|
|
{
|
|
struct elf_dyn_relocs *q;
|
|
|
|
for (q = edir->dyn_relocs; q != NULL; q = q->next)
|
|
if (q->sec == p->sec)
|
|
{
|
|
q->pc_count += p->pc_count;
|
|
q->count += p->count;
|
|
*pp = p->next;
|
|
break;
|
|
}
|
|
if (q == NULL)
|
|
pp = &p->next;
|
|
}
|
|
*pp = edir->dyn_relocs;
|
|
}
|
|
|
|
edir->dyn_relocs = eind->dyn_relocs;
|
|
eind->dyn_relocs = NULL;
|
|
}
|
|
|
|
if (ind->root.type == bfd_link_hash_indirect)
|
|
{
|
|
/* Copy over PLT info. */
|
|
if (dir->got.refcount <= 0)
|
|
{
|
|
edir->got_type = eind->got_type;
|
|
eind->got_type = GOT_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
|
}
|
|
|
|
/* Destroy an AArch64 elf linker hash table. */
|
|
|
|
static void
|
|
elfNN_aarch64_link_hash_table_free (bfd *obfd)
|
|
{
|
|
struct elf_aarch64_link_hash_table *ret
|
|
= (struct elf_aarch64_link_hash_table *) obfd->link.hash;
|
|
|
|
if (ret->loc_hash_table)
|
|
htab_delete (ret->loc_hash_table);
|
|
if (ret->loc_hash_memory)
|
|
objalloc_free ((struct objalloc *) ret->loc_hash_memory);
|
|
|
|
bfd_hash_table_free (&ret->stub_hash_table);
|
|
_bfd_elf_link_hash_table_free (obfd);
|
|
}
|
|
|
|
/* Create an AArch64 elf linker hash table. */
|
|
|
|
static struct bfd_link_hash_table *
|
|
elfNN_aarch64_link_hash_table_create (bfd *abfd)
|
|
{
|
|
struct elf_aarch64_link_hash_table *ret;
|
|
bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
|
|
|
|
ret = bfd_zmalloc (amt);
|
|
if (ret == NULL)
|
|
return NULL;
|
|
|
|
if (!_bfd_elf_link_hash_table_init
|
|
(&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
|
|
sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
|
|
{
|
|
free (ret);
|
|
return NULL;
|
|
}
|
|
|
|
ret->plt_header_size = PLT_ENTRY_SIZE;
|
|
ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
|
|
ret->obfd = abfd;
|
|
ret->dt_tlsdesc_got = (bfd_vma) - 1;
|
|
|
|
if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
|
|
sizeof (struct elf_aarch64_stub_hash_entry)))
|
|
{
|
|
_bfd_elf_link_hash_table_free (abfd);
|
|
return NULL;
|
|
}
|
|
|
|
ret->loc_hash_table = htab_try_create (1024,
|
|
elfNN_aarch64_local_htab_hash,
|
|
elfNN_aarch64_local_htab_eq,
|
|
NULL);
|
|
ret->loc_hash_memory = objalloc_create ();
|
|
if (!ret->loc_hash_table || !ret->loc_hash_memory)
|
|
{
|
|
elfNN_aarch64_link_hash_table_free (abfd);
|
|
return NULL;
|
|
}
|
|
ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free;
|
|
|
|
return &ret->root.root;
|
|
}
|
|
|
|
static bfd_boolean
|
|
aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
|
|
bfd_vma offset, bfd_vma value)
|
|
{
|
|
reloc_howto_type *howto;
|
|
bfd_vma place;
|
|
|
|
howto = elfNN_aarch64_howto_from_type (r_type);
|
|
place = (input_section->output_section->vma + input_section->output_offset
|
|
+ offset);
|
|
|
|
r_type = elfNN_aarch64_bfd_reloc_from_type (r_type);
|
|
value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE);
|
|
return _bfd_aarch64_elf_put_addend (input_bfd,
|
|
input_section->contents + offset, r_type,
|
|
howto, value);
|
|
}
|
|
|
|
static enum elf_aarch64_stub_type
|
|
aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
|
|
{
|
|
if (aarch64_valid_for_adrp_p (value, place))
|
|
return aarch64_stub_adrp_branch;
|
|
return aarch64_stub_long_branch;
|
|
}
|
|
|
|
/* Determine the type of stub needed, if any, for a call. */
|
|
|
|
static enum elf_aarch64_stub_type
|
|
aarch64_type_of_stub (struct bfd_link_info *info,
|
|
asection *input_sec,
|
|
const Elf_Internal_Rela *rel,
|
|
unsigned char st_type,
|
|
struct elf_aarch64_link_hash_entry *hash,
|
|
bfd_vma destination)
|
|
{
|
|
bfd_vma location;
|
|
bfd_signed_vma branch_offset;
|
|
unsigned int r_type;
|
|
struct elf_aarch64_link_hash_table *globals;
|
|
enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
|
|
bfd_boolean via_plt_p;
|
|
|
|
if (st_type != STT_FUNC)
|
|
return stub_type;
|
|
|
|
globals = elf_aarch64_hash_table (info);
|
|
via_plt_p = (globals->root.splt != NULL && hash != NULL
|
|
&& hash->root.plt.offset != (bfd_vma) - 1);
|
|
|
|
if (via_plt_p)
|
|
return stub_type;
|
|
|
|
/* Determine where the call point is. */
|
|
location = (input_sec->output_offset
|
|
+ input_sec->output_section->vma + rel->r_offset);
|
|
|
|
branch_offset = (bfd_signed_vma) (destination - location);
|
|
|
|
r_type = ELFNN_R_TYPE (rel->r_info);
|
|
|
|
/* We don't want to redirect any old unconditional jump in this way,
|
|
only one which is being used for a sibcall, where it is
|
|
acceptable for the IP0 and IP1 registers to be clobbered. */
|
|
if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
|
|
&& (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
|
|
|| branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
|
|
{
|
|
stub_type = aarch64_stub_long_branch;
|
|
}
|
|
|
|
return stub_type;
|
|
}
|
|
|
|
/* Build a name for an entry in the stub hash table. */
|
|
|
|
static char *
|
|
elfNN_aarch64_stub_name (const asection *input_section,
|
|
const asection *sym_sec,
|
|
const struct elf_aarch64_link_hash_entry *hash,
|
|
const Elf_Internal_Rela *rel)
|
|
{
|
|
char *stub_name;
|
|
bfd_size_type len;
|
|
|
|
if (hash)
|
|
{
|
|
len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
|
|
stub_name = bfd_malloc (len);
|
|
if (stub_name != NULL)
|
|
snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
|
|
(unsigned int) input_section->id,
|
|
hash->root.root.root.string,
|
|
rel->r_addend);
|
|
}
|
|
else
|
|
{
|
|
len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
|
|
stub_name = bfd_malloc (len);
|
|
if (stub_name != NULL)
|
|
snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
|
|
(unsigned int) input_section->id,
|
|
(unsigned int) sym_sec->id,
|
|
(unsigned int) ELFNN_R_SYM (rel->r_info),
|
|
rel->r_addend);
|
|
}
|
|
|
|
return stub_name;
|
|
}
|
|
|
|
/* Look up an entry in the stub hash. Stub entries are cached because
|
|
creating the stub name takes a bit of time. */
|
|
|
|
static struct elf_aarch64_stub_hash_entry *
|
|
elfNN_aarch64_get_stub_entry (const asection *input_section,
|
|
const asection *sym_sec,
|
|
struct elf_link_hash_entry *hash,
|
|
const Elf_Internal_Rela *rel,
|
|
struct elf_aarch64_link_hash_table *htab)
|
|
{
|
|
struct elf_aarch64_stub_hash_entry *stub_entry;
|
|
struct elf_aarch64_link_hash_entry *h =
|
|
(struct elf_aarch64_link_hash_entry *) hash;
|
|
const asection *id_sec;
|
|
|
|
if ((input_section->flags & SEC_CODE) == 0)
|
|
return NULL;
|
|
|
|
/* If this input section is part of a group of sections sharing one
|
|
stub section, then use the id of the first section in the group.
|
|
Stub names need to include a section id, as there may well be
|
|
more than one stub used to reach say, printf, and we need to
|
|
distinguish between them. */
|
|
id_sec = htab->stub_group[input_section->id].link_sec;
|
|
|
|
if (h != NULL && h->stub_cache != NULL
|
|
&& h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
|
|
{
|
|
stub_entry = h->stub_cache;
|
|
}
|
|
else
|
|
{
|
|
char *stub_name;
|
|
|
|
stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
|
|
if (stub_name == NULL)
|
|
return NULL;
|
|
|
|
stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
|
|
stub_name, FALSE, FALSE);
|
|
if (h != NULL)
|
|
h->stub_cache = stub_entry;
|
|
|
|
free (stub_name);
|
|
}
|
|
|
|
return stub_entry;
|
|
}
|
|
|
|
/* Add a new stub entry to the stub hash. Not all fields of the new
|
|
stub entry are initialised. */
|
|
|
|
static struct elf_aarch64_stub_hash_entry *
|
|
elfNN_aarch64_add_stub (const char *stub_name,
|
|
asection *section,
|
|
struct elf_aarch64_link_hash_table *htab)
|
|
{
|
|
asection *link_sec;
|
|
asection *stub_sec;
|
|
struct elf_aarch64_stub_hash_entry *stub_entry;
|
|
|
|
link_sec = htab->stub_group[section->id].link_sec;
|
|
stub_sec = htab->stub_group[section->id].stub_sec;
|
|
if (stub_sec == NULL)
|
|
{
|
|
stub_sec = htab->stub_group[link_sec->id].stub_sec;
|
|
if (stub_sec == NULL)
|
|
{
|
|
size_t namelen;
|
|
bfd_size_type len;
|
|
char *s_name;
|
|
|
|
namelen = strlen (link_sec->name);
|
|
len = namelen + sizeof (STUB_SUFFIX);
|
|
s_name = bfd_alloc (htab->stub_bfd, len);
|
|
if (s_name == NULL)
|
|
return NULL;
|
|
|
|
memcpy (s_name, link_sec->name, namelen);
|
|
memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
|
|
stub_sec = (*htab->add_stub_section) (s_name, link_sec);
|
|
if (stub_sec == NULL)
|
|
return NULL;
|
|
htab->stub_group[link_sec->id].stub_sec = stub_sec;
|
|
}
|
|
htab->stub_group[section->id].stub_sec = stub_sec;
|
|
}
|
|
|
|
/* Enter this entry into the linker stub hash table. */
|
|
stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
|
|
TRUE, FALSE);
|
|
if (stub_entry == NULL)
|
|
{
|
|
(*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
|
|
section->owner, stub_name);
|
|
return NULL;
|
|
}
|
|
|
|
stub_entry->stub_sec = stub_sec;
|
|
stub_entry->stub_offset = 0;
|
|
stub_entry->id_sec = link_sec;
|
|
|
|
return stub_entry;
|
|
}
|
|
|
|
static bfd_boolean
|
|
aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
|
|
void *in_arg ATTRIBUTE_UNUSED)
|
|
{
|
|
struct elf_aarch64_stub_hash_entry *stub_entry;
|
|
asection *stub_sec;
|
|
bfd *stub_bfd;
|
|
bfd_byte *loc;
|
|
bfd_vma sym_value;
|
|
bfd_vma veneered_insn_loc;
|
|
bfd_vma veneer_entry_loc;
|
|
bfd_signed_vma branch_offset = 0;
|
|
unsigned int template_size;
|
|
const uint32_t *template;
|
|
unsigned int i;
|
|
|
|
/* Massage our args to the form they really have. */
|
|
stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
|
|
|
|
stub_sec = stub_entry->stub_sec;
|
|
|
|
/* Make a note of the offset within the stubs for this entry. */
|
|
stub_entry->stub_offset = stub_sec->size;
|
|
loc = stub_sec->contents + stub_entry->stub_offset;
|
|
|
|
stub_bfd = stub_sec->owner;
|
|
|
|
/* This is the address of the stub destination. */
|
|
sym_value = (stub_entry->target_value
|
|
+ stub_entry->target_section->output_offset
|
|
+ stub_entry->target_section->output_section->vma);
|
|
|
|
if (stub_entry->stub_type == aarch64_stub_long_branch)
|
|
{
|
|
bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
|
|
+ stub_sec->output_offset);
|
|
|
|
/* See if we can relax the stub. */
|
|
if (aarch64_valid_for_adrp_p (sym_value, place))
|
|
stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
|
|
}
|
|
|
|
switch (stub_entry->stub_type)
|
|
{
|
|
case aarch64_stub_adrp_branch:
|
|
template = aarch64_adrp_branch_stub;
|
|
template_size = sizeof (aarch64_adrp_branch_stub);
|
|
break;
|
|
case aarch64_stub_long_branch:
|
|
template = aarch64_long_branch_stub;
|
|
template_size = sizeof (aarch64_long_branch_stub);
|
|
break;
|
|
case aarch64_stub_erratum_835769_veneer:
|
|
template = aarch64_erratum_835769_stub;
|
|
template_size = sizeof (aarch64_erratum_835769_stub);
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
|
|
for (i = 0; i < (template_size / sizeof template[0]); i++)
|
|
{
|
|
bfd_putl32 (template[i], loc);
|
|
loc += 4;
|
|
}
|
|
|
|
template_size = (template_size + 7) & ~7;
|
|
stub_sec->size += template_size;
|
|
|
|
switch (stub_entry->stub_type)
|
|
{
|
|
case aarch64_stub_adrp_branch:
|
|
if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
|
|
stub_entry->stub_offset, sym_value))
|
|
/* The stub would not have been relaxed if the offset was out
|
|
of range. */
|
|
BFD_FAIL ();
|
|
|
|
_bfd_final_link_relocate
|
|
(elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC)),
|
|
stub_bfd,
|
|
stub_sec,
|
|
stub_sec->contents,
|
|
stub_entry->stub_offset + 4,
|
|
sym_value,
|
|
0);
|
|
break;
|
|
|
|
case aarch64_stub_long_branch:
|
|
/* We want the value relative to the address 12 bytes back from the
|
|
value itself. */
|
|
_bfd_final_link_relocate (elfNN_aarch64_howto_from_type
|
|
(AARCH64_R (PRELNN)), stub_bfd, stub_sec,
|
|
stub_sec->contents,
|
|
stub_entry->stub_offset + 16,
|
|
sym_value + 12, 0);
|
|
break;
|
|
|
|
case aarch64_stub_erratum_835769_veneer:
|
|
veneered_insn_loc = stub_entry->target_section->output_section->vma
|
|
+ stub_entry->target_section->output_offset
|
|
+ stub_entry->target_value;
|
|
veneer_entry_loc = stub_entry->stub_sec->output_section->vma
|
|
+ stub_entry->stub_sec->output_offset
|
|
+ stub_entry->stub_offset;
|
|
branch_offset = veneered_insn_loc - veneer_entry_loc;
|
|
branch_offset >>= 2;
|
|
branch_offset &= 0x3ffffff;
|
|
bfd_putl32 (stub_entry->veneered_insn,
|
|
stub_sec->contents + stub_entry->stub_offset);
|
|
bfd_putl32 (template[1] | branch_offset,
|
|
stub_sec->contents + stub_entry->stub_offset + 4);
|
|
break;
|
|
|
|
default:
|
|
abort ();
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* As above, but don't actually build the stub. Just bump offset so
|
|
we know stub section sizes. */
|
|
|
|
static bfd_boolean
|
|
aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
|
|
void *in_arg ATTRIBUTE_UNUSED)
|
|
{
|
|
struct elf_aarch64_stub_hash_entry *stub_entry;
|
|
int size;
|
|
|
|
/* Massage our args to the form they really have. */
|
|
stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
|
|
|
|
switch (stub_entry->stub_type)
|
|
{
|
|
case aarch64_stub_adrp_branch:
|
|
size = sizeof (aarch64_adrp_branch_stub);
|
|
break;
|
|
case aarch64_stub_long_branch:
|
|
size = sizeof (aarch64_long_branch_stub);
|
|
break;
|
|
case aarch64_stub_erratum_835769_veneer:
|
|
size = sizeof (aarch64_erratum_835769_stub);
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
|
|
size = (size + 7) & ~7;
|
|
stub_entry->stub_sec->size += size;
|
|
return TRUE;
|
|
}
|
|
|
|
/* External entry points for sizing and building linker stubs. */
|
|
|
|
/* Set up various things so that we can make a list of input sections
|
|
for each output section included in the link. Returns -1 on error,
|
|
0 when no stubs will be needed, and 1 on success. */
|
|
|
|
int
|
|
elfNN_aarch64_setup_section_lists (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
bfd *input_bfd;
|
|
unsigned int bfd_count;
|
|
int top_id, top_index;
|
|
asection *section;
|
|
asection **input_list, **list;
|
|
bfd_size_type amt;
|
|
struct elf_aarch64_link_hash_table *htab =
|
|
elf_aarch64_hash_table (info);
|
|
|
|
if (!is_elf_hash_table (htab))
|
|
return 0;
|
|
|
|
/* Count the number of input BFDs and find the top input section id. */
|
|
for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
|
|
input_bfd != NULL; input_bfd = input_bfd->link.next)
|
|
{
|
|
bfd_count += 1;
|
|
for (section = input_bfd->sections;
|
|
section != NULL; section = section->next)
|
|
{
|
|
if (top_id < section->id)
|
|
top_id = section->id;
|
|
}
|
|
}
|
|
htab->bfd_count = bfd_count;
|
|
|
|
amt = sizeof (struct map_stub) * (top_id + 1);
|
|
htab->stub_group = bfd_zmalloc (amt);
|
|
if (htab->stub_group == NULL)
|
|
return -1;
|
|
|
|
/* We can't use output_bfd->section_count here to find the top output
|
|
section index as some sections may have been removed, and
|
|
_bfd_strip_section_from_output doesn't renumber the indices. */
|
|
for (section = output_bfd->sections, top_index = 0;
|
|
section != NULL; section = section->next)
|
|
{
|
|
if (top_index < section->index)
|
|
top_index = section->index;
|
|
}
|
|
|
|
htab->top_index = top_index;
|
|
amt = sizeof (asection *) * (top_index + 1);
|
|
input_list = bfd_malloc (amt);
|
|
htab->input_list = input_list;
|
|
if (input_list == NULL)
|
|
return -1;
|
|
|
|
/* For sections we aren't interested in, mark their entries with a
|
|
value we can check later. */
|
|
list = input_list + top_index;
|
|
do
|
|
*list = bfd_abs_section_ptr;
|
|
while (list-- != input_list);
|
|
|
|
for (section = output_bfd->sections;
|
|
section != NULL; section = section->next)
|
|
{
|
|
if ((section->flags & SEC_CODE) != 0)
|
|
input_list[section->index] = NULL;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Used by elfNN_aarch64_next_input_section and group_sections. */
|
|
#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
|
|
|
|
/* The linker repeatedly calls this function for each input section,
|
|
in the order that input sections are linked into output sections.
|
|
Build lists of input sections to determine groupings between which
|
|
we may insert linker stubs. */
|
|
|
|
void
|
|
elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
|
|
{
|
|
struct elf_aarch64_link_hash_table *htab =
|
|
elf_aarch64_hash_table (info);
|
|
|
|
if (isec->output_section->index <= htab->top_index)
|
|
{
|
|
asection **list = htab->input_list + isec->output_section->index;
|
|
|
|
if (*list != bfd_abs_section_ptr)
|
|
{
|
|
/* Steal the link_sec pointer for our list. */
|
|
/* This happens to make the list in reverse order,
|
|
which is what we want. */
|
|
PREV_SEC (isec) = *list;
|
|
*list = isec;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* See whether we can group stub sections together. Grouping stub
|
|
sections may result in fewer stubs. More importantly, we need to
|
|
put all .init* and .fini* stubs at the beginning of the .init or
|
|
.fini output sections respectively, because glibc splits the
|
|
_init and _fini functions into multiple parts. Putting a stub in
|
|
the middle of a function is not a good idea. */
|
|
|
|
static void
|
|
group_sections (struct elf_aarch64_link_hash_table *htab,
|
|
bfd_size_type stub_group_size,
|
|
bfd_boolean stubs_always_before_branch)
|
|
{
|
|
asection **list = htab->input_list + htab->top_index;
|
|
|
|
do
|
|
{
|
|
asection *tail = *list;
|
|
|
|
if (tail == bfd_abs_section_ptr)
|
|
continue;
|
|
|
|
while (tail != NULL)
|
|
{
|
|
asection *curr;
|
|
asection *prev;
|
|
bfd_size_type total;
|
|
|
|
curr = tail;
|
|
total = tail->size;
|
|
while ((prev = PREV_SEC (curr)) != NULL
|
|
&& ((total += curr->output_offset - prev->output_offset)
|
|
< stub_group_size))
|
|
curr = prev;
|
|
|
|
/* OK, the size from the start of CURR to the end is less
|
|
than stub_group_size and thus can be handled by one stub
|
|
section. (Or the tail section is itself larger than
|
|
stub_group_size, in which case we may be toast.)
|
|
We should really be keeping track of the total size of
|
|
stubs added here, as stubs contribute to the final output
|
|
section size. */
|
|
do
|
|
{
|
|
prev = PREV_SEC (tail);
|
|
/* Set up this stub group. */
|
|
htab->stub_group[tail->id].link_sec = curr;
|
|
}
|
|
while (tail != curr && (tail = prev) != NULL);
|
|
|
|
/* But wait, there's more! Input sections up to stub_group_size
|
|
bytes before the stub section can be handled by it too. */
|
|
if (!stubs_always_before_branch)
|
|
{
|
|
total = 0;
|
|
while (prev != NULL
|
|
&& ((total += tail->output_offset - prev->output_offset)
|
|
< stub_group_size))
|
|
{
|
|
tail = prev;
|
|
prev = PREV_SEC (tail);
|
|
htab->stub_group[tail->id].link_sec = curr;
|
|
}
|
|
}
|
|
tail = prev;
|
|
}
|
|
}
|
|
while (list-- != htab->input_list);
|
|
|
|
free (htab->input_list);
|
|
}
|
|
|
|
#undef PREV_SEC
|
|
|
|
#define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
|
|
|
|
#define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
|
|
#define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
|
|
#define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
|
|
#define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
|
|
#define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
|
|
#define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
|
|
|
|
#define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
|
|
#define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
|
|
#define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
|
|
#define AARCH64_ZR 0x1f
|
|
|
|
/* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
|
|
LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
|
|
|
|
#define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
|
|
#define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
|
|
#define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
|
|
#define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
|
|
#define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
|
|
#define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
|
|
#define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
|
|
#define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
|
|
#define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
|
|
#define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
|
|
#define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
|
|
#define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
|
|
#define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
|
|
#define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
|
|
#define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
|
|
#define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
|
|
#define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
|
|
#define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
|
|
|
|
/* Classify an INSN if it is indeed a load/store. Return TRUE if INSN
|
|
is a load/store along with the Rt and Rtn. Return FALSE if not a
|
|
load/store. */
|
|
|
|
static bfd_boolean
|
|
aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rtn,
|
|
bfd_boolean *pair, bfd_boolean *load)
|
|
{
|
|
uint32_t opcode;
|
|
unsigned int r;
|
|
uint32_t opc = 0;
|
|
uint32_t v = 0;
|
|
uint32_t opc_v = 0;
|
|
|
|
/* Bail out quickly if INSN doesn't fall into the the load-store
|
|
encoding space. */
|
|
if (!AARCH64_LDST (insn))
|
|
return FALSE;
|
|
|
|
*pair = FALSE;
|
|
*load = FALSE;
|
|
if (AARCH64_LDST_EX (insn))
|
|
{
|
|
*rt = AARCH64_RT (insn);
|
|
*rtn = *rt;
|
|
if (AARCH64_BIT (insn, 21) == 1)
|
|
{
|
|
*pair = TRUE;
|
|
*rtn = AARCH64_RT2 (insn);
|
|
}
|
|
*load = AARCH64_LD (insn);
|
|
return TRUE;
|
|
}
|
|
else if (AARCH64_LDST_NAP (insn)
|
|
|| AARCH64_LDSTP_PI (insn)
|
|
|| AARCH64_LDSTP_O (insn)
|
|
|| AARCH64_LDSTP_PRE (insn))
|
|
{
|
|
*pair = TRUE;
|
|
*rt = AARCH64_RT (insn);
|
|
*rtn = AARCH64_RT2 (insn);
|
|
*load = AARCH64_LD (insn);
|
|
return TRUE;
|
|
}
|
|
else if (AARCH64_LDST_PCREL (insn)
|
|
|| AARCH64_LDST_UI (insn)
|
|
|| AARCH64_LDST_PIIMM (insn)
|
|
|| AARCH64_LDST_U (insn)
|
|
|| AARCH64_LDST_PREIMM (insn)
|
|
|| AARCH64_LDST_RO (insn)
|
|
|| AARCH64_LDST_UIMM (insn))
|
|
{
|
|
*rt = AARCH64_RT (insn);
|
|
*rtn = *rt;
|
|
if (AARCH64_LDST_PCREL (insn))
|
|
*load = TRUE;
|
|
opc = AARCH64_BITS (insn, 22, 2);
|
|
v = AARCH64_BIT (insn, 26);
|
|
opc_v = opc | (v << 2);
|
|
*load = (opc_v == 1 || opc_v == 2 || opc_v == 3
|
|
|| opc_v == 5 || opc_v == 7);
|
|
return TRUE;
|
|
}
|
|
else if (AARCH64_LDST_SIMD_M (insn)
|
|
|| AARCH64_LDST_SIMD_M_PI (insn))
|
|
{
|
|
*rt = AARCH64_RT (insn);
|
|
*load = AARCH64_BIT (insn, 22);
|
|
opcode = (insn >> 12) & 0xf;
|
|
switch (opcode)
|
|
{
|
|
case 0:
|
|
case 2:
|
|
*rtn = *rt + 3;
|
|
break;
|
|
|
|
case 4:
|
|
case 6:
|
|
*rtn = *rt + 2;
|
|
break;
|
|
|
|
case 7:
|
|
*rtn = *rt;
|
|
break;
|
|
|
|
case 8:
|
|
case 10:
|
|
*rtn = *rt + 1;
|
|
break;
|
|
|
|
default:
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
else if (AARCH64_LDST_SIMD_S (insn)
|
|
|| AARCH64_LDST_SIMD_S_PI (insn))
|
|
{
|
|
*rt = AARCH64_RT (insn);
|
|
r = (insn >> 21) & 1;
|
|
*load = AARCH64_BIT (insn, 22);
|
|
opcode = (insn >> 13) & 0x7;
|
|
switch (opcode)
|
|
{
|
|
case 0:
|
|
case 2:
|
|
case 4:
|
|
*rtn = *rt + r;
|
|
break;
|
|
|
|
case 1:
|
|
case 3:
|
|
case 5:
|
|
*rtn = *rt + (r == 0 ? 2 : 3);
|
|
break;
|
|
|
|
case 6:
|
|
*rtn = *rt + r;
|
|
break;
|
|
|
|
case 7:
|
|
*rtn = *rt + (r == 0 ? 2 : 3);
|
|
break;
|
|
|
|
default:
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Return TRUE if INSN is multiply-accumulate. */
|
|
|
|
static bfd_boolean
|
|
aarch64_mlxl_p (uint32_t insn)
|
|
{
|
|
uint32_t op31 = AARCH64_OP31 (insn);
|
|
|
|
if (AARCH64_MAC (insn)
|
|
&& (op31 == 0 || op31 == 1 || op31 == 5)
|
|
/* Exclude MUL instructions which are encoded as a multiple accumulate
|
|
with RA = XZR. */
|
|
&& AARCH64_RA (insn) != AARCH64_ZR)
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
|
|
it is possible for a 64-bit multiply-accumulate instruction to generate an
|
|
incorrect result. The details are quite complex and hard to
|
|
determine statically, since branches in the code may exist in some
|
|
circumstances, but all cases end with a memory (load, store, or
|
|
prefetch) instruction followed immediately by the multiply-accumulate
|
|
operation. We employ a linker patching technique, by moving the potentially
|
|
affected multiply-accumulate instruction into a patch region and replacing
|
|
the original instruction with a branch to the patch. This function checks
|
|
if INSN_1 is the memory operation followed by a multiply-accumulate
|
|
operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
|
|
if INSN_1 and INSN_2 are safe. */
|
|
|
|
static bfd_boolean
|
|
aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2)
|
|
{
|
|
uint32_t rt;
|
|
uint32_t rtn;
|
|
uint32_t rn;
|
|
uint32_t rm;
|
|
uint32_t ra;
|
|
bfd_boolean pair;
|
|
bfd_boolean load;
|
|
|
|
if (aarch64_mlxl_p (insn_2)
|
|
&& aarch64_mem_op_p (insn_1, &rt, &rtn, &pair, &load))
|
|
{
|
|
/* Any SIMD memory op is independent of the subsequent MLA
|
|
by definition of the erratum. */
|
|
if (AARCH64_BIT (insn_1, 26))
|
|
return TRUE;
|
|
|
|
/* If not SIMD, check for integer memory ops and MLA relationship. */
|
|
rn = AARCH64_RN (insn_2);
|
|
ra = AARCH64_RA (insn_2);
|
|
rm = AARCH64_RM (insn_2);
|
|
|
|
/* If this is a load and there's a true(RAW) dependency, we are safe
|
|
and this is not an erratum sequence. */
|
|
if (load &&
|
|
(rt == rn || rt == rm || rt == ra
|
|
|| (pair && (rtn == rn || rtn == rm || rtn == ra))))
|
|
return FALSE;
|
|
|
|
/* We conservatively put out stubs for all other cases (including
|
|
writebacks). */
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Used to order a list of mapping symbols by address. */
|
|
|
|
static int
|
|
elf_aarch64_compare_mapping (const void *a, const void *b)
|
|
{
|
|
const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a;
|
|
const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b;
|
|
|
|
if (amap->vma > bmap->vma)
|
|
return 1;
|
|
else if (amap->vma < bmap->vma)
|
|
return -1;
|
|
else if (amap->type > bmap->type)
|
|
/* Ensure results do not depend on the host qsort for objects with
|
|
multiple mapping symbols at the same address by sorting on type
|
|
after vma. */
|
|
return 1;
|
|
else if (amap->type < bmap->type)
|
|
return -1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static bfd_boolean
|
|
erratum_835769_scan (bfd *input_bfd,
|
|
struct bfd_link_info *info,
|
|
struct aarch64_erratum_835769_fix **fixes_p,
|
|
unsigned int *num_fixes_p,
|
|
unsigned int *fix_table_size_p)
|
|
{
|
|
asection *section;
|
|
struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
|
|
struct aarch64_erratum_835769_fix *fixes = *fixes_p;
|
|
unsigned int num_fixes = *num_fixes_p;
|
|
unsigned int fix_table_size = *fix_table_size_p;
|
|
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
for (section = input_bfd->sections;
|
|
section != NULL;
|
|
section = section->next)
|
|
{
|
|
bfd_byte *contents = NULL;
|
|
struct _aarch64_elf_section_data *sec_data;
|
|
unsigned int span;
|
|
|
|
if (elf_section_type (section) != SHT_PROGBITS
|
|
|| (elf_section_flags (section) & SHF_EXECINSTR) == 0
|
|
|| (section->flags & SEC_EXCLUDE) != 0
|
|
|| (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
|
|
|| (section->output_section == bfd_abs_section_ptr))
|
|
continue;
|
|
|
|
if (elf_section_data (section)->this_hdr.contents != NULL)
|
|
contents = elf_section_data (section)->this_hdr.contents;
|
|
else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
|
|
return TRUE;
|
|
|
|
sec_data = elf_aarch64_section_data (section);
|
|
|
|
qsort (sec_data->map, sec_data->mapcount,
|
|
sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
|
|
|
|
for (span = 0; span < sec_data->mapcount; span++)
|
|
{
|
|
unsigned int span_start = sec_data->map[span].vma;
|
|
unsigned int span_end = ((span == sec_data->mapcount - 1)
|
|
? sec_data->map[0].vma + section->size
|
|
: sec_data->map[span + 1].vma);
|
|
unsigned int i;
|
|
char span_type = sec_data->map[span].type;
|
|
|
|
if (span_type == 'd')
|
|
continue;
|
|
|
|
for (i = span_start; i + 4 < span_end; i += 4)
|
|
{
|
|
uint32_t insn_1 = bfd_getl32 (contents + i);
|
|
uint32_t insn_2 = bfd_getl32 (contents + i + 4);
|
|
|
|
if (aarch64_erratum_sequence (insn_1, insn_2))
|
|
{
|
|
char *stub_name = NULL;
|
|
stub_name = (char *) bfd_malloc
|
|
(strlen ("__erratum_835769_veneer_") + 16);
|
|
if (stub_name != NULL)
|
|
sprintf
|
|
(stub_name,"__erratum_835769_veneer_%d", num_fixes);
|
|
else
|
|
return TRUE;
|
|
|
|
if (num_fixes == fix_table_size)
|
|
{
|
|
fix_table_size *= 2;
|
|
fixes =
|
|
(struct aarch64_erratum_835769_fix *)
|
|
bfd_realloc (fixes,
|
|
sizeof (struct aarch64_erratum_835769_fix)
|
|
* fix_table_size);
|
|
if (fixes == NULL)
|
|
return TRUE;
|
|
}
|
|
|
|
fixes[num_fixes].input_bfd = input_bfd;
|
|
fixes[num_fixes].section = section;
|
|
fixes[num_fixes].offset = i + 4;
|
|
fixes[num_fixes].veneered_insn = insn_2;
|
|
fixes[num_fixes].stub_name = stub_name;
|
|
fixes[num_fixes].stub_type = aarch64_stub_erratum_835769_veneer;
|
|
num_fixes++;
|
|
}
|
|
}
|
|
}
|
|
if (elf_section_data (section)->this_hdr.contents == NULL)
|
|
free (contents);
|
|
}
|
|
|
|
*fixes_p = fixes;
|
|
*num_fixes_p = num_fixes;
|
|
*fix_table_size_p = fix_table_size;
|
|
return FALSE;
|
|
}
|
|
|
|
/* Find or create a stub section. Returns a pointer to the stub section, and
|
|
the section to which the stub section will be attached (in *LINK_SEC_P).
|
|
LINK_SEC_P may be NULL. */
|
|
|
|
static asection *
|
|
elf_aarch64_create_or_find_stub_sec (asection **link_sec_p, asection *section,
|
|
struct elf_aarch64_link_hash_table *htab)
|
|
{
|
|
asection *link_sec;
|
|
asection *stub_sec;
|
|
|
|
link_sec = htab->stub_group[section->id].link_sec;
|
|
BFD_ASSERT (link_sec != NULL);
|
|
stub_sec = htab->stub_group[section->id].stub_sec;
|
|
|
|
if (stub_sec == NULL)
|
|
{
|
|
stub_sec = htab->stub_group[link_sec->id].stub_sec;
|
|
if (stub_sec == NULL)
|
|
{
|
|
size_t namelen;
|
|
bfd_size_type len;
|
|
char *s_name;
|
|
|
|
namelen = strlen (link_sec->name);
|
|
len = namelen + sizeof (STUB_SUFFIX);
|
|
s_name = (char *) bfd_alloc (htab->stub_bfd, len);
|
|
if (s_name == NULL)
|
|
return NULL;
|
|
|
|
memcpy (s_name, link_sec->name, namelen);
|
|
memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
|
|
stub_sec = (*htab->add_stub_section) (s_name, link_sec);
|
|
|
|
if (stub_sec == NULL)
|
|
return NULL;
|
|
htab->stub_group[link_sec->id].stub_sec = stub_sec;
|
|
}
|
|
htab->stub_group[section->id].stub_sec = stub_sec;
|
|
}
|
|
|
|
if (link_sec_p)
|
|
*link_sec_p = link_sec;
|
|
|
|
return stub_sec;
|
|
}
|
|
|
|
/* Determine and set the size of the stub section for a final link.
|
|
|
|
The basic idea here is to examine all the relocations looking for
|
|
PC-relative calls to a target that is unreachable with a "bl"
|
|
instruction. */
|
|
|
|
bfd_boolean
|
|
elfNN_aarch64_size_stubs (bfd *output_bfd,
|
|
bfd *stub_bfd,
|
|
struct bfd_link_info *info,
|
|
bfd_signed_vma group_size,
|
|
asection * (*add_stub_section) (const char *,
|
|
asection *),
|
|
void (*layout_sections_again) (void))
|
|
{
|
|
bfd_size_type stub_group_size;
|
|
bfd_boolean stubs_always_before_branch;
|
|
bfd_boolean stub_changed = 0;
|
|
struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
|
|
struct aarch64_erratum_835769_fix *erratum_835769_fixes = NULL;
|
|
unsigned int num_erratum_835769_fixes = 0;
|
|
unsigned int erratum_835769_fix_table_size = 10;
|
|
unsigned int i;
|
|
|
|
if (htab->fix_erratum_835769)
|
|
{
|
|
erratum_835769_fixes
|
|
= (struct aarch64_erratum_835769_fix *)
|
|
bfd_zmalloc
|
|
(sizeof (struct aarch64_erratum_835769_fix) *
|
|
erratum_835769_fix_table_size);
|
|
if (erratum_835769_fixes == NULL)
|
|
goto error_ret_free_local;
|
|
}
|
|
|
|
/* Propagate mach to stub bfd, because it may not have been
|
|
finalized when we created stub_bfd. */
|
|
bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
|
|
bfd_get_mach (output_bfd));
|
|
|
|
/* Stash our params away. */
|
|
htab->stub_bfd = stub_bfd;
|
|
htab->add_stub_section = add_stub_section;
|
|
htab->layout_sections_again = layout_sections_again;
|
|
stubs_always_before_branch = group_size < 0;
|
|
if (group_size < 0)
|
|
stub_group_size = -group_size;
|
|
else
|
|
stub_group_size = group_size;
|
|
|
|
if (stub_group_size == 1)
|
|
{
|
|
/* Default values. */
|
|
/* AArch64 branch range is +-128MB. The value used is 1MB less. */
|
|
stub_group_size = 127 * 1024 * 1024;
|
|
}
|
|
|
|
group_sections (htab, stub_group_size, stubs_always_before_branch);
|
|
|
|
while (1)
|
|
{
|
|
bfd *input_bfd;
|
|
unsigned int bfd_indx;
|
|
asection *stub_sec;
|
|
unsigned prev_num_erratum_835769_fixes = num_erratum_835769_fixes;
|
|
|
|
num_erratum_835769_fixes = 0;
|
|
for (input_bfd = info->input_bfds, bfd_indx = 0;
|
|
input_bfd != NULL; input_bfd = input_bfd->link.next, bfd_indx++)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
asection *section;
|
|
Elf_Internal_Sym *local_syms = NULL;
|
|
|
|
/* We'll need the symbol table in a second. */
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
|
if (symtab_hdr->sh_info == 0)
|
|
continue;
|
|
|
|
/* Walk over each section attached to the input bfd. */
|
|
for (section = input_bfd->sections;
|
|
section != NULL; section = section->next)
|
|
{
|
|
Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
|
|
|
|
/* If there aren't any relocs, then there's nothing more
|
|
to do. */
|
|
if ((section->flags & SEC_RELOC) == 0
|
|
|| section->reloc_count == 0
|
|
|| (section->flags & SEC_CODE) == 0)
|
|
continue;
|
|
|
|
/* If this section is a link-once section that will be
|
|
discarded, then don't create any stubs. */
|
|
if (section->output_section == NULL
|
|
|| section->output_section->owner != output_bfd)
|
|
continue;
|
|
|
|
/* Get the relocs. */
|
|
internal_relocs
|
|
= _bfd_elf_link_read_relocs (input_bfd, section, NULL,
|
|
NULL, info->keep_memory);
|
|
if (internal_relocs == NULL)
|
|
goto error_ret_free_local;
|
|
|
|
/* Now examine each relocation. */
|
|
irela = internal_relocs;
|
|
irelaend = irela + section->reloc_count;
|
|
for (; irela < irelaend; irela++)
|
|
{
|
|
unsigned int r_type, r_indx;
|
|
enum elf_aarch64_stub_type stub_type;
|
|
struct elf_aarch64_stub_hash_entry *stub_entry;
|
|
asection *sym_sec;
|
|
bfd_vma sym_value;
|
|
bfd_vma destination;
|
|
struct elf_aarch64_link_hash_entry *hash;
|
|
const char *sym_name;
|
|
char *stub_name;
|
|
const asection *id_sec;
|
|
unsigned char st_type;
|
|
bfd_size_type len;
|
|
|
|
r_type = ELFNN_R_TYPE (irela->r_info);
|
|
r_indx = ELFNN_R_SYM (irela->r_info);
|
|
|
|
if (r_type >= (unsigned int) R_AARCH64_end)
|
|
{
|
|
bfd_set_error (bfd_error_bad_value);
|
|
error_ret_free_internal:
|
|
if (elf_section_data (section)->relocs == NULL)
|
|
free (internal_relocs);
|
|
goto error_ret_free_local;
|
|
}
|
|
|
|
/* Only look for stubs on unconditional branch and
|
|
branch and link instructions. */
|
|
if (r_type != (unsigned int) AARCH64_R (CALL26)
|
|
&& r_type != (unsigned int) AARCH64_R (JUMP26))
|
|
continue;
|
|
|
|
/* Now determine the call target, its name, value,
|
|
section. */
|
|
sym_sec = NULL;
|
|
sym_value = 0;
|
|
destination = 0;
|
|
hash = NULL;
|
|
sym_name = NULL;
|
|
if (r_indx < symtab_hdr->sh_info)
|
|
{
|
|
/* It's a local symbol. */
|
|
Elf_Internal_Sym *sym;
|
|
Elf_Internal_Shdr *hdr;
|
|
|
|
if (local_syms == NULL)
|
|
{
|
|
local_syms
|
|
= (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
if (local_syms == NULL)
|
|
local_syms
|
|
= bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
|
|
symtab_hdr->sh_info, 0,
|
|
NULL, NULL, NULL);
|
|
if (local_syms == NULL)
|
|
goto error_ret_free_internal;
|
|
}
|
|
|
|
sym = local_syms + r_indx;
|
|
hdr = elf_elfsections (input_bfd)[sym->st_shndx];
|
|
sym_sec = hdr->bfd_section;
|
|
if (!sym_sec)
|
|
/* This is an undefined symbol. It can never
|
|
be resolved. */
|
|
continue;
|
|
|
|
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
|
sym_value = sym->st_value;
|
|
destination = (sym_value + irela->r_addend
|
|
+ sym_sec->output_offset
|
|
+ sym_sec->output_section->vma);
|
|
st_type = ELF_ST_TYPE (sym->st_info);
|
|
sym_name
|
|
= bfd_elf_string_from_elf_section (input_bfd,
|
|
symtab_hdr->sh_link,
|
|
sym->st_name);
|
|
}
|
|
else
|
|
{
|
|
int e_indx;
|
|
|
|
e_indx = r_indx - symtab_hdr->sh_info;
|
|
hash = ((struct elf_aarch64_link_hash_entry *)
|
|
elf_sym_hashes (input_bfd)[e_indx]);
|
|
|
|
while (hash->root.root.type == bfd_link_hash_indirect
|
|
|| hash->root.root.type == bfd_link_hash_warning)
|
|
hash = ((struct elf_aarch64_link_hash_entry *)
|
|
hash->root.root.u.i.link);
|
|
|
|
if (hash->root.root.type == bfd_link_hash_defined
|
|
|| hash->root.root.type == bfd_link_hash_defweak)
|
|
{
|
|
struct elf_aarch64_link_hash_table *globals =
|
|
elf_aarch64_hash_table (info);
|
|
sym_sec = hash->root.root.u.def.section;
|
|
sym_value = hash->root.root.u.def.value;
|
|
/* For a destination in a shared library,
|
|
use the PLT stub as target address to
|
|
decide whether a branch stub is
|
|
needed. */
|
|
if (globals->root.splt != NULL && hash != NULL
|
|
&& hash->root.plt.offset != (bfd_vma) - 1)
|
|
{
|
|
sym_sec = globals->root.splt;
|
|
sym_value = hash->root.plt.offset;
|
|
if (sym_sec->output_section != NULL)
|
|
destination = (sym_value
|
|
+ sym_sec->output_offset
|
|
+
|
|
sym_sec->output_section->vma);
|
|
}
|
|
else if (sym_sec->output_section != NULL)
|
|
destination = (sym_value + irela->r_addend
|
|
+ sym_sec->output_offset
|
|
+ sym_sec->output_section->vma);
|
|
}
|
|
else if (hash->root.root.type == bfd_link_hash_undefined
|
|
|| (hash->root.root.type
|
|
== bfd_link_hash_undefweak))
|
|
{
|
|
/* For a shared library, use the PLT stub as
|
|
target address to decide whether a long
|
|
branch stub is needed.
|
|
For absolute code, they cannot be handled. */
|
|
struct elf_aarch64_link_hash_table *globals =
|
|
elf_aarch64_hash_table (info);
|
|
|
|
if (globals->root.splt != NULL && hash != NULL
|
|
&& hash->root.plt.offset != (bfd_vma) - 1)
|
|
{
|
|
sym_sec = globals->root.splt;
|
|
sym_value = hash->root.plt.offset;
|
|
if (sym_sec->output_section != NULL)
|
|
destination = (sym_value
|
|
+ sym_sec->output_offset
|
|
+
|
|
sym_sec->output_section->vma);
|
|
}
|
|
else
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
bfd_set_error (bfd_error_bad_value);
|
|
goto error_ret_free_internal;
|
|
}
|
|
st_type = ELF_ST_TYPE (hash->root.type);
|
|
sym_name = hash->root.root.root.string;
|
|
}
|
|
|
|
/* Determine what (if any) linker stub is needed. */
|
|
stub_type = aarch64_type_of_stub
|
|
(info, section, irela, st_type, hash, destination);
|
|
if (stub_type == aarch64_stub_none)
|
|
continue;
|
|
|
|
/* Support for grouping stub sections. */
|
|
id_sec = htab->stub_group[section->id].link_sec;
|
|
|
|
/* Get the name of this stub. */
|
|
stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
|
|
irela);
|
|
if (!stub_name)
|
|
goto error_ret_free_internal;
|
|
|
|
stub_entry =
|
|
aarch64_stub_hash_lookup (&htab->stub_hash_table,
|
|
stub_name, FALSE, FALSE);
|
|
if (stub_entry != NULL)
|
|
{
|
|
/* The proper stub has already been created. */
|
|
free (stub_name);
|
|
continue;
|
|
}
|
|
|
|
stub_entry = elfNN_aarch64_add_stub (stub_name, section,
|
|
htab);
|
|
if (stub_entry == NULL)
|
|
{
|
|
free (stub_name);
|
|
goto error_ret_free_internal;
|
|
}
|
|
|
|
stub_entry->target_value = sym_value;
|
|
stub_entry->target_section = sym_sec;
|
|
stub_entry->stub_type = stub_type;
|
|
stub_entry->h = hash;
|
|
stub_entry->st_type = st_type;
|
|
|
|
if (sym_name == NULL)
|
|
sym_name = "unnamed";
|
|
len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
|
|
stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
|
|
if (stub_entry->output_name == NULL)
|
|
{
|
|
free (stub_name);
|
|
goto error_ret_free_internal;
|
|
}
|
|
|
|
snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
|
|
sym_name);
|
|
|
|
stub_changed = TRUE;
|
|
}
|
|
|
|
/* We're done with the internal relocs, free them. */
|
|
if (elf_section_data (section)->relocs == NULL)
|
|
free (internal_relocs);
|
|
}
|
|
|
|
if (htab->fix_erratum_835769)
|
|
{
|
|
/* Scan for sequences which might trigger erratum 835769. */
|
|
if (erratum_835769_scan (input_bfd, info, &erratum_835769_fixes,
|
|
&num_erratum_835769_fixes,
|
|
&erratum_835769_fix_table_size) != 0)
|
|
goto error_ret_free_local;
|
|
}
|
|
}
|
|
|
|
if (prev_num_erratum_835769_fixes != num_erratum_835769_fixes)
|
|
stub_changed = TRUE;
|
|
|
|
if (!stub_changed)
|
|
break;
|
|
|
|
/* OK, we've added some stubs. Find out the new size of the
|
|
stub sections. */
|
|
for (stub_sec = htab->stub_bfd->sections;
|
|
stub_sec != NULL; stub_sec = stub_sec->next)
|
|
{
|
|
/* Ignore non-stub sections. */
|
|
if (!strstr (stub_sec->name, STUB_SUFFIX))
|
|
continue;
|
|
stub_sec->size = 0;
|
|
}
|
|
|
|
bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
|
|
|
|
/* Add erratum 835769 veneers to stub section sizes too. */
|
|
if (htab->fix_erratum_835769)
|
|
for (i = 0; i < num_erratum_835769_fixes; i++)
|
|
{
|
|
stub_sec = elf_aarch64_create_or_find_stub_sec (NULL,
|
|
erratum_835769_fixes[i].section, htab);
|
|
|
|
if (stub_sec == NULL)
|
|
goto error_ret_free_local;
|
|
|
|
stub_sec->size += 8;
|
|
}
|
|
|
|
/* Ask the linker to do its stuff. */
|
|
(*htab->layout_sections_again) ();
|
|
stub_changed = FALSE;
|
|
}
|
|
|
|
/* Add stubs for erratum 835769 fixes now. */
|
|
if (htab->fix_erratum_835769)
|
|
{
|
|
for (i = 0; i < num_erratum_835769_fixes; i++)
|
|
{
|
|
struct elf_aarch64_stub_hash_entry *stub_entry;
|
|
char *stub_name = erratum_835769_fixes[i].stub_name;
|
|
asection *section = erratum_835769_fixes[i].section;
|
|
unsigned int section_id = erratum_835769_fixes[i].section->id;
|
|
asection *link_sec = htab->stub_group[section_id].link_sec;
|
|
asection *stub_sec = htab->stub_group[section_id].stub_sec;
|
|
|
|
stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
|
|
stub_name, TRUE, FALSE);
|
|
if (stub_entry == NULL)
|
|
{
|
|
(*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
|
|
section->owner,
|
|
stub_name);
|
|
return FALSE;
|
|
}
|
|
|
|
stub_entry->stub_sec = stub_sec;
|
|
stub_entry->stub_offset = 0;
|
|
stub_entry->id_sec = link_sec;
|
|
stub_entry->stub_type = erratum_835769_fixes[i].stub_type;
|
|
stub_entry->target_section = section;
|
|
stub_entry->target_value = erratum_835769_fixes[i].offset;
|
|
stub_entry->veneered_insn = erratum_835769_fixes[i].veneered_insn;
|
|
stub_entry->output_name = erratum_835769_fixes[i].stub_name;
|
|
}
|
|
|
|
/* Stash the erratum 835769 fix array for use later in
|
|
elfNN_aarch64_write_section(). */
|
|
htab->aarch64_erratum_835769_fixes = erratum_835769_fixes;
|
|
htab->num_aarch64_erratum_835769_fixes = num_erratum_835769_fixes;
|
|
}
|
|
else
|
|
{
|
|
htab->aarch64_erratum_835769_fixes = NULL;
|
|
htab->num_aarch64_erratum_835769_fixes = 0;
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
error_ret_free_local:
|
|
return FALSE;
|
|
}
|
|
|
|
/* Build all the stubs associated with the current output file. The
|
|
stubs are kept in a hash table attached to the main linker hash
|
|
table. We also set up the .plt entries for statically linked PIC
|
|
functions here. This function is called via aarch64_elf_finish in the
|
|
linker. */
|
|
|
|
bfd_boolean
|
|
elfNN_aarch64_build_stubs (struct bfd_link_info *info)
|
|
{
|
|
asection *stub_sec;
|
|
struct bfd_hash_table *table;
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
|
|
htab = elf_aarch64_hash_table (info);
|
|
|
|
for (stub_sec = htab->stub_bfd->sections;
|
|
stub_sec != NULL; stub_sec = stub_sec->next)
|
|
{
|
|
bfd_size_type size;
|
|
|
|
/* Ignore non-stub sections. */
|
|
if (!strstr (stub_sec->name, STUB_SUFFIX))
|
|
continue;
|
|
|
|
/* Allocate memory to hold the linker stubs. */
|
|
size = stub_sec->size;
|
|
stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
|
|
if (stub_sec->contents == NULL && size != 0)
|
|
return FALSE;
|
|
stub_sec->size = 0;
|
|
}
|
|
|
|
/* Build the stubs as directed by the stub hash table. */
|
|
table = &htab->stub_hash_table;
|
|
bfd_hash_traverse (table, aarch64_build_one_stub, info);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Add an entry to the code/data map for section SEC. */
|
|
|
|
static void
|
|
elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
|
|
{
|
|
struct _aarch64_elf_section_data *sec_data =
|
|
elf_aarch64_section_data (sec);
|
|
unsigned int newidx;
|
|
|
|
if (sec_data->map == NULL)
|
|
{
|
|
sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
|
|
sec_data->mapcount = 0;
|
|
sec_data->mapsize = 1;
|
|
}
|
|
|
|
newidx = sec_data->mapcount++;
|
|
|
|
if (sec_data->mapcount > sec_data->mapsize)
|
|
{
|
|
sec_data->mapsize *= 2;
|
|
sec_data->map = bfd_realloc_or_free
|
|
(sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
|
|
}
|
|
|
|
if (sec_data->map)
|
|
{
|
|
sec_data->map[newidx].vma = vma;
|
|
sec_data->map[newidx].type = type;
|
|
}
|
|
}
|
|
|
|
|
|
/* Initialise maps of insn/data for input BFDs. */
|
|
void
|
|
bfd_elfNN_aarch64_init_maps (bfd *abfd)
|
|
{
|
|
Elf_Internal_Sym *isymbuf;
|
|
Elf_Internal_Shdr *hdr;
|
|
unsigned int i, localsyms;
|
|
|
|
/* Make sure that we are dealing with an AArch64 elf binary. */
|
|
if (!is_aarch64_elf (abfd))
|
|
return;
|
|
|
|
if ((abfd->flags & DYNAMIC) != 0)
|
|
return;
|
|
|
|
hdr = &elf_symtab_hdr (abfd);
|
|
localsyms = hdr->sh_info;
|
|
|
|
/* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
|
|
should contain the number of local symbols, which should come before any
|
|
global symbols. Mapping symbols are always local. */
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
|
|
|
|
/* No internal symbols read? Skip this BFD. */
|
|
if (isymbuf == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < localsyms; i++)
|
|
{
|
|
Elf_Internal_Sym *isym = &isymbuf[i];
|
|
asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
|
const char *name;
|
|
|
|
if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
|
|
{
|
|
name = bfd_elf_string_from_elf_section (abfd,
|
|
hdr->sh_link,
|
|
isym->st_name);
|
|
|
|
if (bfd_is_aarch64_special_symbol_name
|
|
(name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
|
|
elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set option values needed during linking. */
|
|
void
|
|
bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
|
|
struct bfd_link_info *link_info,
|
|
int no_enum_warn,
|
|
int no_wchar_warn, int pic_veneer,
|
|
int fix_erratum_835769)
|
|
{
|
|
struct elf_aarch64_link_hash_table *globals;
|
|
|
|
globals = elf_aarch64_hash_table (link_info);
|
|
globals->pic_veneer = pic_veneer;
|
|
globals->fix_erratum_835769 = fix_erratum_835769;
|
|
|
|
BFD_ASSERT (is_aarch64_elf (output_bfd));
|
|
elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
|
|
elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
|
|
}
|
|
|
|
static bfd_vma
|
|
aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
|
|
struct elf_aarch64_link_hash_table
|
|
*globals, struct bfd_link_info *info,
|
|
bfd_vma value, bfd *output_bfd,
|
|
bfd_boolean *unresolved_reloc_p)
|
|
{
|
|
bfd_vma off = (bfd_vma) - 1;
|
|
asection *basegot = globals->root.sgot;
|
|
bfd_boolean dyn = globals->root.dynamic_sections_created;
|
|
|
|
if (h != NULL)
|
|
{
|
|
BFD_ASSERT (basegot != NULL);
|
|
off = h->got.offset;
|
|
BFD_ASSERT (off != (bfd_vma) - 1);
|
|
if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
|
|
|| (info->shared
|
|
&& SYMBOL_REFERENCES_LOCAL (info, h))
|
|
|| (ELF_ST_VISIBILITY (h->other)
|
|
&& h->root.type == bfd_link_hash_undefweak))
|
|
{
|
|
/* This is actually a static link, or it is a -Bsymbolic link
|
|
and the symbol is defined locally. We must initialize this
|
|
entry in the global offset table. Since the offset must
|
|
always be a multiple of 8 (4 in the case of ILP32), we use
|
|
the least significant bit to record whether we have
|
|
initialized it already.
|
|
When doing a dynamic link, we create a .rel(a).got relocation
|
|
entry to initialize the value. This is done in the
|
|
finish_dynamic_symbol routine. */
|
|
if ((off & 1) != 0)
|
|
off &= ~1;
|
|
else
|
|
{
|
|
bfd_put_NN (output_bfd, value, basegot->contents + off);
|
|
h->got.offset |= 1;
|
|
}
|
|
}
|
|
else
|
|
*unresolved_reloc_p = FALSE;
|
|
|
|
off = off + basegot->output_section->vma + basegot->output_offset;
|
|
}
|
|
|
|
return off;
|
|
}
|
|
|
|
/* Change R_TYPE to a more efficient access model where possible,
|
|
return the new reloc type. */
|
|
|
|
static bfd_reloc_code_real_type
|
|
aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
|
|
struct elf_link_hash_entry *h)
|
|
{
|
|
bfd_boolean is_local = h == NULL;
|
|
|
|
switch (r_type)
|
|
{
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
|
|
return (is_local
|
|
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
|
|
: BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
|
|
return (is_local
|
|
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
|
|
: r_type);
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
|
|
return (is_local
|
|
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
|
|
: BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
|
|
|
|
case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
|
|
return (is_local
|
|
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
|
|
: BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
|
|
|
|
case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
|
|
return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
|
|
|
|
case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
|
|
return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
|
|
|
|
case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
|
|
return r_type;
|
|
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
|
|
return (is_local
|
|
? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
|
|
: BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_CALL:
|
|
/* Instructions with these relocations will become NOPs. */
|
|
return BFD_RELOC_AARCH64_NONE;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return r_type;
|
|
}
|
|
|
|
static unsigned int
|
|
aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
|
|
case BFD_RELOC_AARCH64_GOT_LD_PREL19:
|
|
return GOT_NORMAL;
|
|
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
|
|
return GOT_TLS_GD;
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_CALL:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
|
|
return GOT_TLSDESC_GD;
|
|
|
|
case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
|
|
return GOT_TLS_IE;
|
|
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
|
|
return GOT_UNKNOWN;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return GOT_UNKNOWN;
|
|
}
|
|
|
|
static bfd_boolean
|
|
aarch64_can_relax_tls (bfd *input_bfd,
|
|
struct bfd_link_info *info,
|
|
bfd_reloc_code_real_type r_type,
|
|
struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
unsigned int symbol_got_type;
|
|
unsigned int reloc_got_type;
|
|
|
|
if (! IS_AARCH64_TLS_RELOC (r_type))
|
|
return FALSE;
|
|
|
|
symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
|
|
reloc_got_type = aarch64_reloc_got_type (r_type);
|
|
|
|
if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
|
|
return TRUE;
|
|
|
|
if (info->shared)
|
|
return FALSE;
|
|
|
|
if (h && h->root.type == bfd_link_hash_undefweak)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Given the relocation code R_TYPE, return the relaxed bfd reloc
|
|
enumerator. */
|
|
|
|
static bfd_reloc_code_real_type
|
|
aarch64_tls_transition (bfd *input_bfd,
|
|
struct bfd_link_info *info,
|
|
unsigned int r_type,
|
|
struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
bfd_reloc_code_real_type bfd_r_type
|
|
= elfNN_aarch64_bfd_reloc_from_type (r_type);
|
|
|
|
if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
|
|
return bfd_r_type;
|
|
|
|
return aarch64_tls_transition_without_check (bfd_r_type, h);
|
|
}
|
|
|
|
/* Return the base VMA address which should be subtracted from real addresses
|
|
when resolving R_AARCH64_TLS_DTPREL relocation. */
|
|
|
|
static bfd_vma
|
|
dtpoff_base (struct bfd_link_info *info)
|
|
{
|
|
/* If tls_sec is NULL, we should have signalled an error already. */
|
|
BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
|
|
return elf_hash_table (info)->tls_sec->vma;
|
|
}
|
|
|
|
/* Return the base VMA address which should be subtracted from real addresses
|
|
when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
|
|
|
|
static bfd_vma
|
|
tpoff_base (struct bfd_link_info *info)
|
|
{
|
|
struct elf_link_hash_table *htab = elf_hash_table (info);
|
|
|
|
/* If tls_sec is NULL, we should have signalled an error already. */
|
|
BFD_ASSERT (htab->tls_sec != NULL);
|
|
|
|
bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
|
|
htab->tls_sec->alignment_power);
|
|
return htab->tls_sec->vma - base;
|
|
}
|
|
|
|
static bfd_vma *
|
|
symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
/* Calculate the address of the GOT entry for symbol
|
|
referred to in h. */
|
|
if (h != NULL)
|
|
return &h->got.offset;
|
|
else
|
|
{
|
|
/* local symbol */
|
|
struct elf_aarch64_local_symbol *l;
|
|
|
|
l = elf_aarch64_locals (input_bfd);
|
|
return &l[r_symndx].got_offset;
|
|
}
|
|
}
|
|
|
|
static void
|
|
symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
bfd_vma *p;
|
|
p = symbol_got_offset_ref (input_bfd, h, r_symndx);
|
|
*p |= 1;
|
|
}
|
|
|
|
static int
|
|
symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
bfd_vma value;
|
|
value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
|
|
return value & 1;
|
|
}
|
|
|
|
static bfd_vma
|
|
symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
bfd_vma value;
|
|
value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
|
|
value &= ~1;
|
|
return value;
|
|
}
|
|
|
|
static bfd_vma *
|
|
symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
/* Calculate the address of the GOT entry for symbol
|
|
referred to in h. */
|
|
if (h != NULL)
|
|
{
|
|
struct elf_aarch64_link_hash_entry *eh;
|
|
eh = (struct elf_aarch64_link_hash_entry *) h;
|
|
return &eh->tlsdesc_got_jump_table_offset;
|
|
}
|
|
else
|
|
{
|
|
/* local symbol */
|
|
struct elf_aarch64_local_symbol *l;
|
|
|
|
l = elf_aarch64_locals (input_bfd);
|
|
return &l[r_symndx].tlsdesc_got_jump_table_offset;
|
|
}
|
|
}
|
|
|
|
static void
|
|
symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
bfd_vma *p;
|
|
p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
|
|
*p |= 1;
|
|
}
|
|
|
|
static int
|
|
symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
|
|
struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
bfd_vma value;
|
|
value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
|
|
return value & 1;
|
|
}
|
|
|
|
static bfd_vma
|
|
symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
|
|
unsigned long r_symndx)
|
|
{
|
|
bfd_vma value;
|
|
value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
|
|
value &= ~1;
|
|
return value;
|
|
}
|
|
|
|
/* Data for make_branch_to_erratum_835769_stub(). */
|
|
|
|
struct erratum_835769_branch_to_stub_data
|
|
{
|
|
asection *output_section;
|
|
bfd_byte *contents;
|
|
};
|
|
|
|
/* Helper to insert branches to erratum 835769 stubs in the right
|
|
places for a particular section. */
|
|
|
|
static bfd_boolean
|
|
make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry,
|
|
void *in_arg)
|
|
{
|
|
struct elf_aarch64_stub_hash_entry *stub_entry;
|
|
struct erratum_835769_branch_to_stub_data *data;
|
|
bfd_byte *contents;
|
|
unsigned long branch_insn = 0;
|
|
bfd_vma veneered_insn_loc, veneer_entry_loc;
|
|
bfd_signed_vma branch_offset;
|
|
unsigned int target;
|
|
bfd *abfd;
|
|
|
|
stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
|
|
data = (struct erratum_835769_branch_to_stub_data *) in_arg;
|
|
|
|
if (stub_entry->target_section != data->output_section
|
|
|| stub_entry->stub_type != aarch64_stub_erratum_835769_veneer)
|
|
return TRUE;
|
|
|
|
contents = data->contents;
|
|
veneered_insn_loc = stub_entry->target_section->output_section->vma
|
|
+ stub_entry->target_section->output_offset
|
|
+ stub_entry->target_value;
|
|
veneer_entry_loc = stub_entry->stub_sec->output_section->vma
|
|
+ stub_entry->stub_sec->output_offset
|
|
+ stub_entry->stub_offset;
|
|
branch_offset = veneer_entry_loc - veneered_insn_loc;
|
|
|
|
abfd = stub_entry->target_section->owner;
|
|
if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
|
|
(*_bfd_error_handler)
|
|
(_("%B: error: Erratum 835769 stub out "
|
|
"of range (input file too large)"), abfd);
|
|
|
|
target = stub_entry->target_value;
|
|
branch_insn = 0x14000000;
|
|
branch_offset >>= 2;
|
|
branch_offset &= 0x3ffffff;
|
|
branch_insn |= branch_offset;
|
|
bfd_putl32 (branch_insn, &contents[target]);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED,
|
|
struct bfd_link_info *link_info,
|
|
asection *sec,
|
|
bfd_byte *contents)
|
|
|
|
{
|
|
struct elf_aarch64_link_hash_table *globals =
|
|
elf_aarch64_hash_table (link_info);
|
|
|
|
if (globals == NULL)
|
|
return FALSE;
|
|
|
|
/* Fix code to point to erratum 835769 stubs. */
|
|
if (globals->fix_erratum_835769)
|
|
{
|
|
struct erratum_835769_branch_to_stub_data data;
|
|
|
|
data.output_section = sec;
|
|
data.contents = contents;
|
|
bfd_hash_traverse (&globals->stub_hash_table,
|
|
make_branch_to_erratum_835769_stub, &data);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Perform a relocation as part of a final link. */
|
|
static bfd_reloc_status_type
|
|
elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
|
|
bfd *input_bfd,
|
|
bfd *output_bfd,
|
|
asection *input_section,
|
|
bfd_byte *contents,
|
|
Elf_Internal_Rela *rel,
|
|
bfd_vma value,
|
|
struct bfd_link_info *info,
|
|
asection *sym_sec,
|
|
struct elf_link_hash_entry *h,
|
|
bfd_boolean *unresolved_reloc_p,
|
|
bfd_boolean save_addend,
|
|
bfd_vma *saved_addend,
|
|
Elf_Internal_Sym *sym)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
unsigned int r_type = howto->type;
|
|
bfd_reloc_code_real_type bfd_r_type
|
|
= elfNN_aarch64_bfd_reloc_from_howto (howto);
|
|
bfd_reloc_code_real_type new_bfd_r_type;
|
|
unsigned long r_symndx;
|
|
bfd_byte *hit_data = contents + rel->r_offset;
|
|
bfd_vma place;
|
|
bfd_signed_vma signed_addend;
|
|
struct elf_aarch64_link_hash_table *globals;
|
|
bfd_boolean weak_undef_p;
|
|
|
|
globals = elf_aarch64_hash_table (info);
|
|
|
|
symtab_hdr = &elf_symtab_hdr (input_bfd);
|
|
|
|
BFD_ASSERT (is_aarch64_elf (input_bfd));
|
|
|
|
r_symndx = ELFNN_R_SYM (rel->r_info);
|
|
|
|
/* It is possible to have linker relaxations on some TLS access
|
|
models. Update our information here. */
|
|
new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx);
|
|
if (new_bfd_r_type != bfd_r_type)
|
|
{
|
|
bfd_r_type = new_bfd_r_type;
|
|
howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
|
|
BFD_ASSERT (howto != NULL);
|
|
r_type = howto->type;
|
|
}
|
|
|
|
place = input_section->output_section->vma
|
|
+ input_section->output_offset + rel->r_offset;
|
|
|
|
/* Get addend, accumulating the addend for consecutive relocs
|
|
which refer to the same offset. */
|
|
signed_addend = saved_addend ? *saved_addend : 0;
|
|
signed_addend += rel->r_addend;
|
|
|
|
weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
|
|
: bfd_is_und_section (sym_sec));
|
|
|
|
/* Since STT_GNU_IFUNC symbol must go through PLT, we handle
|
|
it here if it is defined in a non-shared object. */
|
|
if (h != NULL
|
|
&& h->type == STT_GNU_IFUNC
|
|
&& h->def_regular)
|
|
{
|
|
asection *plt;
|
|
const char *name;
|
|
asection *base_got;
|
|
bfd_vma off;
|
|
|
|
if ((input_section->flags & SEC_ALLOC) == 0
|
|
|| h->plt.offset == (bfd_vma) -1)
|
|
abort ();
|
|
|
|
/* STT_GNU_IFUNC symbol must go through PLT. */
|
|
plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
|
|
value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
|
|
|
|
switch (bfd_r_type)
|
|
{
|
|
default:
|
|
if (h->root.root.string)
|
|
name = h->root.root.string;
|
|
else
|
|
name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
|
|
NULL);
|
|
(*_bfd_error_handler)
|
|
(_("%B: relocation %s against STT_GNU_IFUNC "
|
|
"symbol `%s' isn't handled by %s"), input_bfd,
|
|
howto->name, name, __FUNCTION__);
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return FALSE;
|
|
|
|
case BFD_RELOC_AARCH64_NN:
|
|
if (rel->r_addend != 0)
|
|
{
|
|
if (h->root.root.string)
|
|
name = h->root.root.string;
|
|
else
|
|
name = bfd_elf_sym_name (input_bfd, symtab_hdr,
|
|
sym, NULL);
|
|
(*_bfd_error_handler)
|
|
(_("%B: relocation %s against STT_GNU_IFUNC "
|
|
"symbol `%s' has non-zero addend: %d"),
|
|
input_bfd, howto->name, name, rel->r_addend);
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Generate dynamic relocation only when there is a
|
|
non-GOT reference in a shared object. */
|
|
if (info->shared && h->non_got_ref)
|
|
{
|
|
Elf_Internal_Rela outrel;
|
|
asection *sreloc;
|
|
|
|
/* Need a dynamic relocation to get the real function
|
|
address. */
|
|
outrel.r_offset = _bfd_elf_section_offset (output_bfd,
|
|
info,
|
|
input_section,
|
|
rel->r_offset);
|
|
if (outrel.r_offset == (bfd_vma) -1
|
|
|| outrel.r_offset == (bfd_vma) -2)
|
|
abort ();
|
|
|
|
outrel.r_offset += (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
|
|
if (h->dynindx == -1
|
|
|| h->forced_local
|
|
|| info->executable)
|
|
{
|
|
/* This symbol is resolved locally. */
|
|
outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
|
|
outrel.r_addend = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
}
|
|
else
|
|
{
|
|
outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
|
|
outrel.r_addend = 0;
|
|
}
|
|
|
|
sreloc = globals->root.irelifunc;
|
|
elf_append_rela (output_bfd, sreloc, &outrel);
|
|
|
|
/* If this reloc is against an external symbol, we
|
|
do not want to fiddle with the addend. Otherwise,
|
|
we need to include the symbol value so that it
|
|
becomes an addend for the dynamic reloc. For an
|
|
internal symbol, we have updated addend. */
|
|
return bfd_reloc_ok;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case BFD_RELOC_AARCH64_JUMP26:
|
|
case BFD_RELOC_AARCH64_CALL26:
|
|
value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
|
|
signed_addend,
|
|
weak_undef_p);
|
|
return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
|
|
howto, value);
|
|
case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
|
|
case BFD_RELOC_AARCH64_GOT_LD_PREL19:
|
|
base_got = globals->root.sgot;
|
|
off = h->got.offset;
|
|
|
|
if (base_got == NULL)
|
|
abort ();
|
|
|
|
if (off == (bfd_vma) -1)
|
|
{
|
|
bfd_vma plt_index;
|
|
|
|
/* We can't use h->got.offset here to save state, or
|
|
even just remember the offset, as finish_dynamic_symbol
|
|
would use that as offset into .got. */
|
|
|
|
if (globals->root.splt != NULL)
|
|
{
|
|
plt_index = ((h->plt.offset - globals->plt_header_size) /
|
|
globals->plt_entry_size);
|
|
off = (plt_index + 3) * GOT_ENTRY_SIZE;
|
|
base_got = globals->root.sgotplt;
|
|
}
|
|
else
|
|
{
|
|
plt_index = h->plt.offset / globals->plt_entry_size;
|
|
off = plt_index * GOT_ENTRY_SIZE;
|
|
base_got = globals->root.igotplt;
|
|
}
|
|
|
|
if (h->dynindx == -1
|
|
|| h->forced_local
|
|
|| info->symbolic)
|
|
{
|
|
/* This references the local definition. We must
|
|
initialize this entry in the global offset table.
|
|
Since the offset must always be a multiple of 8,
|
|
we use the least significant bit to record
|
|
whether we have initialized it already.
|
|
|
|
When doing a dynamic link, we create a .rela.got
|
|
relocation entry to initialize the value. This
|
|
is done in the finish_dynamic_symbol routine. */
|
|
if ((off & 1) != 0)
|
|
off &= ~1;
|
|
else
|
|
{
|
|
bfd_put_NN (output_bfd, value,
|
|
base_got->contents + off);
|
|
/* Note that this is harmless as -1 | 1 still is -1. */
|
|
h->got.offset |= 1;
|
|
}
|
|
}
|
|
value = (base_got->output_section->vma
|
|
+ base_got->output_offset + off);
|
|
}
|
|
else
|
|
value = aarch64_calculate_got_entry_vma (h, globals, info,
|
|
value, output_bfd,
|
|
unresolved_reloc_p);
|
|
value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
|
|
0, weak_undef_p);
|
|
return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
|
|
case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
|
|
case BFD_RELOC_AARCH64_ADD_LO12:
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (bfd_r_type)
|
|
{
|
|
case BFD_RELOC_AARCH64_NONE:
|
|
case BFD_RELOC_AARCH64_TLSDESC_CALL:
|
|
*unresolved_reloc_p = FALSE;
|
|
return bfd_reloc_ok;
|
|
|
|
case BFD_RELOC_AARCH64_NN:
|
|
|
|
/* When generating a shared object or relocatable executable, these
|
|
relocations are copied into the output file to be resolved at
|
|
run time. */
|
|
if (((info->shared == TRUE) || globals->root.is_relocatable_executable)
|
|
&& (input_section->flags & SEC_ALLOC)
|
|
&& (h == NULL
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak))
|
|
{
|
|
Elf_Internal_Rela outrel;
|
|
bfd_byte *loc;
|
|
bfd_boolean skip, relocate;
|
|
asection *sreloc;
|
|
|
|
*unresolved_reloc_p = FALSE;
|
|
|
|
skip = FALSE;
|
|
relocate = FALSE;
|
|
|
|
outrel.r_addend = signed_addend;
|
|
outrel.r_offset =
|
|
_bfd_elf_section_offset (output_bfd, info, input_section,
|
|
rel->r_offset);
|
|
if (outrel.r_offset == (bfd_vma) - 1)
|
|
skip = TRUE;
|
|
else if (outrel.r_offset == (bfd_vma) - 2)
|
|
{
|
|
skip = TRUE;
|
|
relocate = TRUE;
|
|
}
|
|
|
|
outrel.r_offset += (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
|
|
if (skip)
|
|
memset (&outrel, 0, sizeof outrel);
|
|
else if (h != NULL
|
|
&& h->dynindx != -1
|
|
&& (!info->shared || !SYMBOLIC_BIND (info, h) || !h->def_regular))
|
|
outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
|
|
else
|
|
{
|
|
int symbol;
|
|
|
|
/* On SVR4-ish systems, the dynamic loader cannot
|
|
relocate the text and data segments independently,
|
|
so the symbol does not matter. */
|
|
symbol = 0;
|
|
outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
|
|
outrel.r_addend += value;
|
|
}
|
|
|
|
sreloc = elf_section_data (input_section)->sreloc;
|
|
if (sreloc == NULL || sreloc->contents == NULL)
|
|
return bfd_reloc_notsupported;
|
|
|
|
loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
|
|
bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
|
|
|
|
if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
|
|
{
|
|
/* Sanity to check that we have previously allocated
|
|
sufficient space in the relocation section for the
|
|
number of relocations we actually want to emit. */
|
|
abort ();
|
|
}
|
|
|
|
/* If this reloc is against an external symbol, we do not want to
|
|
fiddle with the addend. Otherwise, we need to include the symbol
|
|
value so that it becomes an addend for the dynamic reloc. */
|
|
if (!relocate)
|
|
return bfd_reloc_ok;
|
|
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset, value,
|
|
signed_addend);
|
|
}
|
|
else
|
|
value += signed_addend;
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_JUMP26:
|
|
case BFD_RELOC_AARCH64_CALL26:
|
|
{
|
|
asection *splt = globals->root.splt;
|
|
bfd_boolean via_plt_p =
|
|
splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
|
|
|
|
/* A call to an undefined weak symbol is converted to a jump to
|
|
the next instruction unless a PLT entry will be created.
|
|
The jump to the next instruction is optimized as a NOP.
|
|
Do the same for local undefined symbols. */
|
|
if (weak_undef_p && ! via_plt_p)
|
|
{
|
|
bfd_putl32 (INSN_NOP, hit_data);
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
/* If the call goes through a PLT entry, make sure to
|
|
check distance to the right destination address. */
|
|
if (via_plt_p)
|
|
{
|
|
value = (splt->output_section->vma
|
|
+ splt->output_offset + h->plt.offset);
|
|
*unresolved_reloc_p = FALSE;
|
|
}
|
|
|
|
/* If the target symbol is global and marked as a function the
|
|
relocation applies a function call or a tail call. In this
|
|
situation we can veneer out of range branches. The veneers
|
|
use IP0 and IP1 hence cannot be used arbitrary out of range
|
|
branches that occur within the body of a function. */
|
|
if (h && h->type == STT_FUNC)
|
|
{
|
|
/* Check if a stub has to be inserted because the destination
|
|
is too far away. */
|
|
if (! aarch64_valid_branch_p (value, place))
|
|
{
|
|
/* The target is out of reach, so redirect the branch to
|
|
the local stub for this function. */
|
|
struct elf_aarch64_stub_hash_entry *stub_entry;
|
|
stub_entry = elfNN_aarch64_get_stub_entry (input_section,
|
|
sym_sec, h,
|
|
rel, globals);
|
|
if (stub_entry != NULL)
|
|
value = (stub_entry->stub_offset
|
|
+ stub_entry->stub_sec->output_offset
|
|
+ stub_entry->stub_sec->output_section->vma);
|
|
}
|
|
}
|
|
}
|
|
value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
|
|
signed_addend, weak_undef_p);
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_16:
|
|
#if ARCH_SIZE == 64
|
|
case BFD_RELOC_AARCH64_32:
|
|
#endif
|
|
case BFD_RELOC_AARCH64_ADD_LO12:
|
|
case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
|
|
case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
|
|
case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
|
|
case BFD_RELOC_AARCH64_BRANCH19:
|
|
case BFD_RELOC_AARCH64_LD_LO19_PCREL:
|
|
case BFD_RELOC_AARCH64_LDST8_LO12:
|
|
case BFD_RELOC_AARCH64_LDST16_LO12:
|
|
case BFD_RELOC_AARCH64_LDST32_LO12:
|
|
case BFD_RELOC_AARCH64_LDST64_LO12:
|
|
case BFD_RELOC_AARCH64_LDST128_LO12:
|
|
case BFD_RELOC_AARCH64_MOVW_G0_S:
|
|
case BFD_RELOC_AARCH64_MOVW_G1_S:
|
|
case BFD_RELOC_AARCH64_MOVW_G2_S:
|
|
case BFD_RELOC_AARCH64_MOVW_G0:
|
|
case BFD_RELOC_AARCH64_MOVW_G0_NC:
|
|
case BFD_RELOC_AARCH64_MOVW_G1:
|
|
case BFD_RELOC_AARCH64_MOVW_G1_NC:
|
|
case BFD_RELOC_AARCH64_MOVW_G2:
|
|
case BFD_RELOC_AARCH64_MOVW_G2_NC:
|
|
case BFD_RELOC_AARCH64_MOVW_G3:
|
|
case BFD_RELOC_AARCH64_16_PCREL:
|
|
case BFD_RELOC_AARCH64_32_PCREL:
|
|
case BFD_RELOC_AARCH64_64_PCREL:
|
|
case BFD_RELOC_AARCH64_TSTBR14:
|
|
value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
|
|
signed_addend, weak_undef_p);
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
|
|
case BFD_RELOC_AARCH64_GOT_LD_PREL19:
|
|
if (globals->root.sgot == NULL)
|
|
BFD_ASSERT (h != NULL);
|
|
|
|
if (h != NULL)
|
|
{
|
|
value = aarch64_calculate_got_entry_vma (h, globals, info, value,
|
|
output_bfd,
|
|
unresolved_reloc_p);
|
|
value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
|
|
0, weak_undef_p);
|
|
}
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
|
|
if (globals->root.sgot == NULL)
|
|
return bfd_reloc_notsupported;
|
|
|
|
value = (symbol_got_offset (input_bfd, h, r_symndx)
|
|
+ globals->root.sgot->output_section->vma
|
|
+ globals->root.sgot->output_offset);
|
|
|
|
value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
|
|
0, weak_undef_p);
|
|
*unresolved_reloc_p = FALSE;
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
|
|
value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
|
|
signed_addend - tpoff_base (info),
|
|
weak_undef_p);
|
|
*unresolved_reloc_p = FALSE;
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADD:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LDR:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
|
|
if (globals->root.sgot == NULL)
|
|
return bfd_reloc_notsupported;
|
|
value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
|
|
+ globals->root.sgotplt->output_section->vma
|
|
+ globals->root.sgotplt->output_offset
|
|
+ globals->sgotplt_jump_table_size);
|
|
|
|
value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
|
|
0, weak_undef_p);
|
|
*unresolved_reloc_p = FALSE;
|
|
break;
|
|
|
|
default:
|
|
return bfd_reloc_notsupported;
|
|
}
|
|
|
|
if (saved_addend)
|
|
*saved_addend = value;
|
|
|
|
/* Only apply the final relocation in a sequence. */
|
|
if (save_addend)
|
|
return bfd_reloc_continue;
|
|
|
|
return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
|
|
howto, value);
|
|
}
|
|
|
|
/* Handle TLS relaxations. Relaxing is possible for symbols that use
|
|
R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
|
|
link.
|
|
|
|
Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
|
|
is to then call final_link_relocate. Return other values in the
|
|
case of error. */
|
|
|
|
static bfd_reloc_status_type
|
|
elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
|
|
bfd *input_bfd, bfd_byte *contents,
|
|
Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
|
|
{
|
|
bfd_boolean is_local = h == NULL;
|
|
unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
|
|
unsigned long insn;
|
|
|
|
BFD_ASSERT (globals && input_bfd && contents && rel);
|
|
|
|
switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
|
|
{
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
|
|
if (is_local)
|
|
{
|
|
/* GD->LE relaxation:
|
|
adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
|
|
or
|
|
adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
|
|
*/
|
|
bfd_putl32 (0xd2a00000, contents + rel->r_offset);
|
|
return bfd_reloc_continue;
|
|
}
|
|
else
|
|
{
|
|
/* GD->IE relaxation:
|
|
adrp x0, :tlsgd:var => adrp x0, :gottprel:var
|
|
or
|
|
adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
|
|
*/
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
|
|
BFD_ASSERT (0);
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
|
|
if (is_local)
|
|
{
|
|
/* Tiny TLSDESC->LE relaxation:
|
|
ldr x1, :tlsdesc:var => movz x0, #:tprel_g1:var
|
|
adr x0, :tlsdesc:var => movk x0, #:tprel_g0_nc:var
|
|
.tlsdesccall var
|
|
blr x1 => nop
|
|
*/
|
|
BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
|
|
BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
|
|
|
|
rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
|
|
AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
|
|
rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
|
|
|
|
bfd_putl32 (0xd2a00000, contents + rel->r_offset);
|
|
bfd_putl32 (0xf2800000, contents + rel->r_offset + 4);
|
|
bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
|
|
return bfd_reloc_continue;
|
|
}
|
|
else
|
|
{
|
|
/* Tiny TLSDESC->IE relaxation:
|
|
ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
|
|
adr x0, :tlsdesc:var => nop
|
|
.tlsdesccall var
|
|
blr x1 => nop
|
|
*/
|
|
BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
|
|
BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
|
|
|
|
rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
|
|
rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
|
|
|
|
bfd_putl32 (0x58000000, contents + rel->r_offset);
|
|
bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
|
|
bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
|
|
if (is_local)
|
|
{
|
|
/* Tiny GD->LE relaxation:
|
|
adr x0, :tlsgd:var => mrs x1, tpidr_el0
|
|
bl __tls_get_addr => add x0, x1, #:tprel_hi12:x, lsl #12
|
|
nop => add x0, x0, #:tprel_lo12_nc:x
|
|
*/
|
|
|
|
/* First kill the tls_get_addr reloc on the bl instruction. */
|
|
BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
|
|
|
|
bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0);
|
|
bfd_putl32 (0x91400020, contents + rel->r_offset + 4);
|
|
bfd_putl32 (0x91000000, contents + rel->r_offset + 8);
|
|
|
|
rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
|
|
AARCH64_R (TLSLE_ADD_TPREL_LO12_NC));
|
|
rel[1].r_offset = rel->r_offset + 8;
|
|
|
|
/* Move the current relocation to the second instruction in
|
|
the sequence. */
|
|
rel->r_offset += 4;
|
|
rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
|
|
AARCH64_R (TLSLE_ADD_TPREL_HI12));
|
|
return bfd_reloc_continue;
|
|
}
|
|
else
|
|
{
|
|
/* Tiny GD->IE relaxation:
|
|
adr x0, :tlsgd:var => ldr x0, :gottprel:var
|
|
bl __tls_get_addr => mrs x1, tpidr_el0
|
|
nop => add x0, x0, x1
|
|
*/
|
|
|
|
/* First kill the tls_get_addr reloc on the bl instruction. */
|
|
BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
|
|
rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
|
|
|
|
bfd_putl32 (0x58000000, contents + rel->r_offset);
|
|
bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
|
|
bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
|
|
return bfd_reloc_continue;
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
|
|
if (is_local)
|
|
{
|
|
/* GD->LE relaxation:
|
|
ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
|
|
*/
|
|
bfd_putl32 (0xf2800000, contents + rel->r_offset);
|
|
return bfd_reloc_continue;
|
|
}
|
|
else
|
|
{
|
|
/* GD->IE relaxation:
|
|
ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
|
|
*/
|
|
insn = bfd_getl32 (contents + rel->r_offset);
|
|
insn &= 0xffffffe0;
|
|
bfd_putl32 (insn, contents + rel->r_offset);
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
|
|
if (is_local)
|
|
{
|
|
/* GD->LE relaxation
|
|
add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
|
|
bl __tls_get_addr => mrs x1, tpidr_el0
|
|
nop => add x0, x1, x0
|
|
*/
|
|
|
|
/* First kill the tls_get_addr reloc on the bl instruction. */
|
|
BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
|
|
rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
|
|
|
|
bfd_putl32 (0xf2800000, contents + rel->r_offset);
|
|
bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
|
|
bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
|
|
return bfd_reloc_continue;
|
|
}
|
|
else
|
|
{
|
|
/* GD->IE relaxation
|
|
ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
|
|
BL __tls_get_addr => mrs x1, tpidr_el0
|
|
R_AARCH64_CALL26
|
|
NOP => add x0, x1, x0
|
|
*/
|
|
|
|
BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
|
|
|
|
/* Remove the relocation on the BL instruction. */
|
|
rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
|
|
|
|
bfd_putl32 (0xf9400000, contents + rel->r_offset);
|
|
|
|
/* We choose to fixup the BL and NOP instructions using the
|
|
offset from the second relocation to allow flexibility in
|
|
scheduling instructions between the ADD and BL. */
|
|
bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
|
|
bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4);
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_CALL:
|
|
/* GD->IE/LE relaxation:
|
|
add x0, x0, #:tlsdesc_lo12:var => nop
|
|
blr xd => nop
|
|
*/
|
|
bfd_putl32 (INSN_NOP, contents + rel->r_offset);
|
|
return bfd_reloc_ok;
|
|
|
|
case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
|
|
/* IE->LE relaxation:
|
|
adrp xd, :gottprel:var => movz xd, :tprel_g1:var
|
|
*/
|
|
if (is_local)
|
|
{
|
|
insn = bfd_getl32 (contents + rel->r_offset);
|
|
bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset);
|
|
}
|
|
return bfd_reloc_continue;
|
|
|
|
case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
|
|
/* IE->LE relaxation:
|
|
ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
|
|
*/
|
|
if (is_local)
|
|
{
|
|
insn = bfd_getl32 (contents + rel->r_offset);
|
|
bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset);
|
|
}
|
|
return bfd_reloc_continue;
|
|
|
|
default:
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
/* Relocate an AArch64 ELF section. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_relocate_section (bfd *output_bfd,
|
|
struct bfd_link_info *info,
|
|
bfd *input_bfd,
|
|
asection *input_section,
|
|
bfd_byte *contents,
|
|
Elf_Internal_Rela *relocs,
|
|
Elf_Internal_Sym *local_syms,
|
|
asection **local_sections)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
Elf_Internal_Rela *rel;
|
|
Elf_Internal_Rela *relend;
|
|
const char *name;
|
|
struct elf_aarch64_link_hash_table *globals;
|
|
bfd_boolean save_addend = FALSE;
|
|
bfd_vma addend = 0;
|
|
|
|
globals = elf_aarch64_hash_table (info);
|
|
|
|
symtab_hdr = &elf_symtab_hdr (input_bfd);
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
|
|
|
rel = relocs;
|
|
relend = relocs + input_section->reloc_count;
|
|
for (; rel < relend; rel++)
|
|
{
|
|
unsigned int r_type;
|
|
bfd_reloc_code_real_type bfd_r_type;
|
|
bfd_reloc_code_real_type relaxed_bfd_r_type;
|
|
reloc_howto_type *howto;
|
|
unsigned long r_symndx;
|
|
Elf_Internal_Sym *sym;
|
|
asection *sec;
|
|
struct elf_link_hash_entry *h;
|
|
bfd_vma relocation;
|
|
bfd_reloc_status_type r;
|
|
arelent bfd_reloc;
|
|
char sym_type;
|
|
bfd_boolean unresolved_reloc = FALSE;
|
|
char *error_message = NULL;
|
|
|
|
r_symndx = ELFNN_R_SYM (rel->r_info);
|
|
r_type = ELFNN_R_TYPE (rel->r_info);
|
|
|
|
bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type);
|
|
howto = bfd_reloc.howto;
|
|
|
|
if (howto == NULL)
|
|
{
|
|
(*_bfd_error_handler)
|
|
(_("%B: unrecognized relocation (0x%x) in section `%A'"),
|
|
input_bfd, input_section, r_type);
|
|
return FALSE;
|
|
}
|
|
bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
|
|
|
|
h = NULL;
|
|
sym = NULL;
|
|
sec = NULL;
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
sym_type = ELFNN_ST_TYPE (sym->st_info);
|
|
sec = local_sections[r_symndx];
|
|
|
|
/* An object file might have a reference to a local
|
|
undefined symbol. This is a daft object file, but we
|
|
should at least do something about it. */
|
|
if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
|
|
&& bfd_is_und_section (sec)
|
|
&& ELF_ST_BIND (sym->st_info) != STB_WEAK)
|
|
{
|
|
if (!info->callbacks->undefined_symbol
|
|
(info, bfd_elf_string_from_elf_section
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name),
|
|
input_bfd, input_section, rel->r_offset, TRUE))
|
|
return FALSE;
|
|
}
|
|
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
|
|
|
/* Relocate against local STT_GNU_IFUNC symbol. */
|
|
if (!info->relocatable
|
|
&& ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
|
|
{
|
|
h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
|
|
rel, FALSE);
|
|
if (h == NULL)
|
|
abort ();
|
|
|
|
/* Set STT_GNU_IFUNC symbol value. */
|
|
h->root.u.def.value = sym->st_value;
|
|
h->root.u.def.section = sec;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
bfd_boolean warned, ignored;
|
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
|
r_symndx, symtab_hdr, sym_hashes,
|
|
h, sec, relocation,
|
|
unresolved_reloc, warned, ignored);
|
|
|
|
sym_type = h->type;
|
|
}
|
|
|
|
if (sec != NULL && discarded_section (sec))
|
|
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
|
rel, 1, relend, howto, 0, contents);
|
|
|
|
if (info->relocatable)
|
|
continue;
|
|
|
|
if (h != NULL)
|
|
name = h->root.root.string;
|
|
else
|
|
{
|
|
name = (bfd_elf_string_from_elf_section
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
|
if (name == NULL || *name == '\0')
|
|
name = bfd_section_name (input_bfd, sec);
|
|
}
|
|
|
|
if (r_symndx != 0
|
|
&& r_type != R_AARCH64_NONE
|
|
&& r_type != R_AARCH64_NULL
|
|
&& (h == NULL
|
|
|| h->root.type == bfd_link_hash_defined
|
|
|| h->root.type == bfd_link_hash_defweak)
|
|
&& IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
|
|
{
|
|
(*_bfd_error_handler)
|
|
((sym_type == STT_TLS
|
|
? _("%B(%A+0x%lx): %s used with TLS symbol %s")
|
|
: _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
|
|
input_bfd,
|
|
input_section, (long) rel->r_offset, howto->name, name);
|
|
}
|
|
|
|
/* We relax only if we can see that there can be a valid transition
|
|
from a reloc type to another.
|
|
We call elfNN_aarch64_final_link_relocate unless we're completely
|
|
done, i.e., the relaxation produced the final output we want. */
|
|
|
|
relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
|
|
h, r_symndx);
|
|
if (relaxed_bfd_r_type != bfd_r_type)
|
|
{
|
|
bfd_r_type = relaxed_bfd_r_type;
|
|
howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
|
|
BFD_ASSERT (howto != NULL);
|
|
r_type = howto->type;
|
|
r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
|
|
unresolved_reloc = 0;
|
|
}
|
|
else
|
|
r = bfd_reloc_continue;
|
|
|
|
/* There may be multiple consecutive relocations for the
|
|
same offset. In that case we are supposed to treat the
|
|
output of each relocation as the addend for the next. */
|
|
if (rel + 1 < relend
|
|
&& rel->r_offset == rel[1].r_offset
|
|
&& ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
|
|
&& ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
|
|
save_addend = TRUE;
|
|
else
|
|
save_addend = FALSE;
|
|
|
|
if (r == bfd_reloc_continue)
|
|
r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
|
|
input_section, contents, rel,
|
|
relocation, info, sec,
|
|
h, &unresolved_reloc,
|
|
save_addend, &addend, sym);
|
|
|
|
switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
|
|
{
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
|
|
if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
|
|
{
|
|
bfd_boolean need_relocs = FALSE;
|
|
bfd_byte *loc;
|
|
int indx;
|
|
bfd_vma off;
|
|
|
|
off = symbol_got_offset (input_bfd, h, r_symndx);
|
|
indx = h && h->dynindx != -1 ? h->dynindx : 0;
|
|
|
|
need_relocs =
|
|
(info->shared || indx != 0) &&
|
|
(h == NULL
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak);
|
|
|
|
BFD_ASSERT (globals->root.srelgot != NULL);
|
|
|
|
if (need_relocs)
|
|
{
|
|
Elf_Internal_Rela rela;
|
|
rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
|
|
rela.r_addend = 0;
|
|
rela.r_offset = globals->root.sgot->output_section->vma +
|
|
globals->root.sgot->output_offset + off;
|
|
|
|
|
|
loc = globals->root.srelgot->contents;
|
|
loc += globals->root.srelgot->reloc_count++
|
|
* RELOC_SIZE (htab);
|
|
bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
|
|
|
|
if (indx == 0)
|
|
{
|
|
bfd_put_NN (output_bfd,
|
|
relocation - dtpoff_base (info),
|
|
globals->root.sgot->contents + off
|
|
+ GOT_ENTRY_SIZE);
|
|
}
|
|
else
|
|
{
|
|
/* This TLS symbol is global. We emit a
|
|
relocation to fixup the tls offset at load
|
|
time. */
|
|
rela.r_info =
|
|
ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
|
|
rela.r_addend = 0;
|
|
rela.r_offset =
|
|
(globals->root.sgot->output_section->vma
|
|
+ globals->root.sgot->output_offset + off
|
|
+ GOT_ENTRY_SIZE);
|
|
|
|
loc = globals->root.srelgot->contents;
|
|
loc += globals->root.srelgot->reloc_count++
|
|
* RELOC_SIZE (globals);
|
|
bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
|
|
bfd_put_NN (output_bfd, (bfd_vma) 0,
|
|
globals->root.sgot->contents + off
|
|
+ GOT_ENTRY_SIZE);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
bfd_put_NN (output_bfd, (bfd_vma) 1,
|
|
globals->root.sgot->contents + off);
|
|
bfd_put_NN (output_bfd,
|
|
relocation - dtpoff_base (info),
|
|
globals->root.sgot->contents + off
|
|
+ GOT_ENTRY_SIZE);
|
|
}
|
|
|
|
symbol_got_offset_mark (input_bfd, h, r_symndx);
|
|
}
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
|
|
if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
|
|
{
|
|
bfd_boolean need_relocs = FALSE;
|
|
bfd_byte *loc;
|
|
int indx;
|
|
bfd_vma off;
|
|
|
|
off = symbol_got_offset (input_bfd, h, r_symndx);
|
|
|
|
indx = h && h->dynindx != -1 ? h->dynindx : 0;
|
|
|
|
need_relocs =
|
|
(info->shared || indx != 0) &&
|
|
(h == NULL
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak);
|
|
|
|
BFD_ASSERT (globals->root.srelgot != NULL);
|
|
|
|
if (need_relocs)
|
|
{
|
|
Elf_Internal_Rela rela;
|
|
|
|
if (indx == 0)
|
|
rela.r_addend = relocation - dtpoff_base (info);
|
|
else
|
|
rela.r_addend = 0;
|
|
|
|
rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
|
|
rela.r_offset = globals->root.sgot->output_section->vma +
|
|
globals->root.sgot->output_offset + off;
|
|
|
|
loc = globals->root.srelgot->contents;
|
|
loc += globals->root.srelgot->reloc_count++
|
|
* RELOC_SIZE (htab);
|
|
|
|
bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
|
|
|
|
bfd_put_NN (output_bfd, rela.r_addend,
|
|
globals->root.sgot->contents + off);
|
|
}
|
|
else
|
|
bfd_put_NN (output_bfd, relocation - tpoff_base (info),
|
|
globals->root.sgot->contents + off);
|
|
|
|
symbol_got_offset_mark (input_bfd, h, r_symndx);
|
|
}
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
|
|
if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
|
|
{
|
|
bfd_boolean need_relocs = FALSE;
|
|
int indx = h && h->dynindx != -1 ? h->dynindx : 0;
|
|
bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
|
|
|
|
need_relocs = (h == NULL
|
|
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak);
|
|
|
|
BFD_ASSERT (globals->root.srelgot != NULL);
|
|
BFD_ASSERT (globals->root.sgot != NULL);
|
|
|
|
if (need_relocs)
|
|
{
|
|
bfd_byte *loc;
|
|
Elf_Internal_Rela rela;
|
|
rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
|
|
|
|
rela.r_addend = 0;
|
|
rela.r_offset = (globals->root.sgotplt->output_section->vma
|
|
+ globals->root.sgotplt->output_offset
|
|
+ off + globals->sgotplt_jump_table_size);
|
|
|
|
if (indx == 0)
|
|
rela.r_addend = relocation - dtpoff_base (info);
|
|
|
|
/* Allocate the next available slot in the PLT reloc
|
|
section to hold our R_AARCH64_TLSDESC, the next
|
|
available slot is determined from reloc_count,
|
|
which we step. But note, reloc_count was
|
|
artifically moved down while allocating slots for
|
|
real PLT relocs such that all of the PLT relocs
|
|
will fit above the initial reloc_count and the
|
|
extra stuff will fit below. */
|
|
loc = globals->root.srelplt->contents;
|
|
loc += globals->root.srelplt->reloc_count++
|
|
* RELOC_SIZE (globals);
|
|
|
|
bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
|
|
|
|
bfd_put_NN (output_bfd, (bfd_vma) 0,
|
|
globals->root.sgotplt->contents + off +
|
|
globals->sgotplt_jump_table_size);
|
|
bfd_put_NN (output_bfd, (bfd_vma) 0,
|
|
globals->root.sgotplt->contents + off +
|
|
globals->sgotplt_jump_table_size +
|
|
GOT_ENTRY_SIZE);
|
|
}
|
|
|
|
symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!save_addend)
|
|
addend = 0;
|
|
|
|
|
|
/* Dynamic relocs are not propagated for SEC_DEBUGGING sections
|
|
because such sections are not SEC_ALLOC and thus ld.so will
|
|
not process them. */
|
|
if (unresolved_reloc
|
|
&& !((input_section->flags & SEC_DEBUGGING) != 0
|
|
&& h->def_dynamic)
|
|
&& _bfd_elf_section_offset (output_bfd, info, input_section,
|
|
+rel->r_offset) != (bfd_vma) - 1)
|
|
{
|
|
(*_bfd_error_handler)
|
|
(_
|
|
("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
|
|
input_bfd, input_section, (long) rel->r_offset, howto->name,
|
|
h->root.root.string);
|
|
return FALSE;
|
|
}
|
|
|
|
if (r != bfd_reloc_ok && r != bfd_reloc_continue)
|
|
{
|
|
switch (r)
|
|
{
|
|
case bfd_reloc_overflow:
|
|
/* If the overflowing reloc was to an undefined symbol,
|
|
we have already printed one error message and there
|
|
is no point complaining again. */
|
|
if ((!h ||
|
|
h->root.type != bfd_link_hash_undefined)
|
|
&& (!((*info->callbacks->reloc_overflow)
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
|
(bfd_vma) 0, input_bfd, input_section,
|
|
rel->r_offset))))
|
|
return FALSE;
|
|
break;
|
|
|
|
case bfd_reloc_undefined:
|
|
if (!((*info->callbacks->undefined_symbol)
|
|
(info, name, input_bfd, input_section,
|
|
rel->r_offset, TRUE)))
|
|
return FALSE;
|
|
break;
|
|
|
|
case bfd_reloc_outofrange:
|
|
error_message = _("out of range");
|
|
goto common_error;
|
|
|
|
case bfd_reloc_notsupported:
|
|
error_message = _("unsupported relocation");
|
|
goto common_error;
|
|
|
|
case bfd_reloc_dangerous:
|
|
/* error_message should already be set. */
|
|
goto common_error;
|
|
|
|
default:
|
|
error_message = _("unknown error");
|
|
/* Fall through. */
|
|
|
|
common_error:
|
|
BFD_ASSERT (error_message != NULL);
|
|
if (!((*info->callbacks->reloc_dangerous)
|
|
(info, error_message, input_bfd, input_section,
|
|
rel->r_offset)))
|
|
return FALSE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Set the right machine number. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_object_p (bfd *abfd)
|
|
{
|
|
#if ARCH_SIZE == 32
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
|
|
#else
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
|
|
#endif
|
|
return TRUE;
|
|
}
|
|
|
|
/* Function to keep AArch64 specific flags in the ELF header. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
|
|
{
|
|
if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
|
|
{
|
|
}
|
|
else
|
|
{
|
|
elf_elfheader (abfd)->e_flags = flags;
|
|
elf_flags_init (abfd) = TRUE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Merge backend specific data from an object file to the output
|
|
object file when linking. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
|
|
{
|
|
flagword out_flags;
|
|
flagword in_flags;
|
|
bfd_boolean flags_compatible = TRUE;
|
|
asection *sec;
|
|
|
|
/* Check if we have the same endianess. */
|
|
if (!_bfd_generic_verify_endian_match (ibfd, obfd))
|
|
return FALSE;
|
|
|
|
if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
|
|
return TRUE;
|
|
|
|
/* The input BFD must have had its flags initialised. */
|
|
/* The following seems bogus to me -- The flags are initialized in
|
|
the assembler but I don't think an elf_flags_init field is
|
|
written into the object. */
|
|
/* BFD_ASSERT (elf_flags_init (ibfd)); */
|
|
|
|
in_flags = elf_elfheader (ibfd)->e_flags;
|
|
out_flags = elf_elfheader (obfd)->e_flags;
|
|
|
|
if (!elf_flags_init (obfd))
|
|
{
|
|
/* If the input is the default architecture and had the default
|
|
flags then do not bother setting the flags for the output
|
|
architecture, instead allow future merges to do this. If no
|
|
future merges ever set these flags then they will retain their
|
|
uninitialised values, which surprise surprise, correspond
|
|
to the default values. */
|
|
if (bfd_get_arch_info (ibfd)->the_default
|
|
&& elf_elfheader (ibfd)->e_flags == 0)
|
|
return TRUE;
|
|
|
|
elf_flags_init (obfd) = TRUE;
|
|
elf_elfheader (obfd)->e_flags = in_flags;
|
|
|
|
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
|
|
&& bfd_get_arch_info (obfd)->the_default)
|
|
return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
|
|
bfd_get_mach (ibfd));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Identical flags must be compatible. */
|
|
if (in_flags == out_flags)
|
|
return TRUE;
|
|
|
|
/* Check to see if the input BFD actually contains any sections. If
|
|
not, its flags may not have been initialised either, but it
|
|
cannot actually cause any incompatiblity. Do not short-circuit
|
|
dynamic objects; their section list may be emptied by
|
|
elf_link_add_object_symbols.
|
|
|
|
Also check to see if there are no code sections in the input.
|
|
In this case there is no need to check for code specific flags.
|
|
XXX - do we need to worry about floating-point format compatability
|
|
in data sections ? */
|
|
if (!(ibfd->flags & DYNAMIC))
|
|
{
|
|
bfd_boolean null_input_bfd = TRUE;
|
|
bfd_boolean only_data_sections = TRUE;
|
|
|
|
for (sec = ibfd->sections; sec != NULL; sec = sec->next)
|
|
{
|
|
if ((bfd_get_section_flags (ibfd, sec)
|
|
& (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
|
|
== (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
|
|
only_data_sections = FALSE;
|
|
|
|
null_input_bfd = FALSE;
|
|
break;
|
|
}
|
|
|
|
if (null_input_bfd || only_data_sections)
|
|
return TRUE;
|
|
}
|
|
|
|
return flags_compatible;
|
|
}
|
|
|
|
/* Display the flags field. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
|
|
{
|
|
FILE *file = (FILE *) ptr;
|
|
unsigned long flags;
|
|
|
|
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
|
|
|
/* Print normal ELF private data. */
|
|
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
|
|
|
flags = elf_elfheader (abfd)->e_flags;
|
|
/* Ignore init flag - it may not be set, despite the flags field
|
|
containing valid data. */
|
|
|
|
/* xgettext:c-format */
|
|
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
|
|
|
if (flags)
|
|
fprintf (file, _("<Unrecognised flag bits set>"));
|
|
|
|
fputc ('\n', file);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Update the got entry reference counts for the section being removed. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_gc_sweep_hook (bfd *abfd,
|
|
struct bfd_link_info *info,
|
|
asection *sec,
|
|
const Elf_Internal_Rela * relocs)
|
|
{
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
struct elf_aarch64_local_symbol *locals;
|
|
const Elf_Internal_Rela *rel, *relend;
|
|
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
htab = elf_aarch64_hash_table (info);
|
|
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
elf_section_data (sec)->local_dynrel = NULL;
|
|
|
|
symtab_hdr = &elf_symtab_hdr (abfd);
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
|
|
locals = elf_aarch64_locals (abfd);
|
|
|
|
relend = relocs + sec->reloc_count;
|
|
for (rel = relocs; rel < relend; rel++)
|
|
{
|
|
unsigned long r_symndx;
|
|
unsigned int r_type;
|
|
struct elf_link_hash_entry *h = NULL;
|
|
|
|
r_symndx = ELFNN_R_SYM (rel->r_info);
|
|
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
|
{
|
|
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
}
|
|
else
|
|
{
|
|
Elf_Internal_Sym *isym;
|
|
|
|
/* A local symbol. */
|
|
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
|
|
abfd, r_symndx);
|
|
|
|
/* Check relocation against local STT_GNU_IFUNC symbol. */
|
|
if (isym != NULL
|
|
&& ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
|
|
{
|
|
h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE);
|
|
if (h == NULL)
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
if (h)
|
|
{
|
|
struct elf_aarch64_link_hash_entry *eh;
|
|
struct elf_dyn_relocs **pp;
|
|
struct elf_dyn_relocs *p;
|
|
|
|
eh = (struct elf_aarch64_link_hash_entry *) h;
|
|
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
|
|
if (p->sec == sec)
|
|
{
|
|
/* Everything must go for SEC. */
|
|
*pp = p->next;
|
|
break;
|
|
}
|
|
}
|
|
|
|
r_type = ELFNN_R_TYPE (rel->r_info);
|
|
switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx))
|
|
{
|
|
case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
|
|
case BFD_RELOC_AARCH64_GOT_LD_PREL19:
|
|
case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
|
|
if (h != NULL)
|
|
{
|
|
if (h->got.refcount > 0)
|
|
h->got.refcount -= 1;
|
|
|
|
if (h->type == STT_GNU_IFUNC)
|
|
{
|
|
if (h->plt.refcount > 0)
|
|
h->plt.refcount -= 1;
|
|
}
|
|
}
|
|
else if (locals != NULL)
|
|
{
|
|
if (locals[r_symndx].got_refcount > 0)
|
|
locals[r_symndx].got_refcount -= 1;
|
|
}
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_CALL26:
|
|
case BFD_RELOC_AARCH64_JUMP26:
|
|
/* If this is a local symbol then we resolve it
|
|
directly without creating a PLT entry. */
|
|
if (h == NULL)
|
|
continue;
|
|
|
|
if (h->plt.refcount > 0)
|
|
h->plt.refcount -= 1;
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_MOVW_G0_NC:
|
|
case BFD_RELOC_AARCH64_MOVW_G1_NC:
|
|
case BFD_RELOC_AARCH64_MOVW_G2_NC:
|
|
case BFD_RELOC_AARCH64_MOVW_G3:
|
|
case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
|
|
case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
|
|
case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
|
|
case BFD_RELOC_AARCH64_NN:
|
|
if (h != NULL && info->executable)
|
|
{
|
|
if (h->plt.refcount > 0)
|
|
h->plt.refcount -= 1;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Adjust a symbol defined by a dynamic object and referenced by a
|
|
regular object. The current definition is in some section of the
|
|
dynamic object, but we're not including those sections. We have to
|
|
change the definition to something the rest of the link can
|
|
understand. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *h)
|
|
{
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
asection *s;
|
|
|
|
/* If this is a function, put it in the procedure linkage table. We
|
|
will fill in the contents of the procedure linkage table later,
|
|
when we know the address of the .got section. */
|
|
if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
|
|
{
|
|
if (h->plt.refcount <= 0
|
|
|| (h->type != STT_GNU_IFUNC
|
|
&& (SYMBOL_CALLS_LOCAL (info, h)
|
|
|| (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
|
|
&& h->root.type == bfd_link_hash_undefweak))))
|
|
{
|
|
/* This case can occur if we saw a CALL26 reloc in
|
|
an input file, but the symbol wasn't referred to
|
|
by a dynamic object or all references were
|
|
garbage collected. In which case we can end up
|
|
resolving. */
|
|
h->plt.offset = (bfd_vma) - 1;
|
|
h->needs_plt = 0;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
else
|
|
/* It's possible that we incorrectly decided a .plt reloc was
|
|
needed for an R_X86_64_PC32 reloc to a non-function sym in
|
|
check_relocs. We can't decide accurately between function and
|
|
non-function syms in check-relocs; Objects loaded later in
|
|
the link may change h->type. So fix it now. */
|
|
h->plt.offset = (bfd_vma) - 1;
|
|
|
|
|
|
/* If this is a weak symbol, and there is a real definition, the
|
|
processor independent code will have arranged for us to see the
|
|
real definition first, and we can just use the same value. */
|
|
if (h->u.weakdef != NULL)
|
|
{
|
|
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
|
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
|
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
|
h->root.u.def.value = h->u.weakdef->root.u.def.value;
|
|
if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
|
|
h->non_got_ref = h->u.weakdef->non_got_ref;
|
|
return TRUE;
|
|
}
|
|
|
|
/* If we are creating a shared library, we must presume that the
|
|
only references to the symbol are via the global offset table.
|
|
For such cases we need not do anything here; the relocations will
|
|
be handled correctly by relocate_section. */
|
|
if (info->shared)
|
|
return TRUE;
|
|
|
|
/* If there are no references to this symbol that do not use the
|
|
GOT, we don't need to generate a copy reloc. */
|
|
if (!h->non_got_ref)
|
|
return TRUE;
|
|
|
|
/* If -z nocopyreloc was given, we won't generate them either. */
|
|
if (info->nocopyreloc)
|
|
{
|
|
h->non_got_ref = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
/* We must allocate the symbol in our .dynbss section, which will
|
|
become part of the .bss section of the executable. There will be
|
|
an entry for this symbol in the .dynsym section. The dynamic
|
|
object will contain position independent code, so all references
|
|
from the dynamic object to this symbol will go through the global
|
|
offset table. The dynamic linker will use the .dynsym entry to
|
|
determine the address it must put in the global offset table, so
|
|
both the dynamic object and the regular object will refer to the
|
|
same memory location for the variable. */
|
|
|
|
htab = elf_aarch64_hash_table (info);
|
|
|
|
/* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
|
|
to copy the initial value out of the dynamic object and into the
|
|
runtime process image. */
|
|
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
|
|
{
|
|
htab->srelbss->size += RELOC_SIZE (htab);
|
|
h->needs_copy = 1;
|
|
}
|
|
|
|
s = htab->sdynbss;
|
|
|
|
return _bfd_elf_adjust_dynamic_copy (info, h, s);
|
|
|
|
}
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
|
|
{
|
|
struct elf_aarch64_local_symbol *locals;
|
|
locals = elf_aarch64_locals (abfd);
|
|
if (locals == NULL)
|
|
{
|
|
locals = (struct elf_aarch64_local_symbol *)
|
|
bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
|
|
if (locals == NULL)
|
|
return FALSE;
|
|
elf_aarch64_locals (abfd) = locals;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Create the .got section to hold the global offset table. */
|
|
|
|
static bfd_boolean
|
|
aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
|
|
{
|
|
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
|
flagword flags;
|
|
asection *s;
|
|
struct elf_link_hash_entry *h;
|
|
struct elf_link_hash_table *htab = elf_hash_table (info);
|
|
|
|
/* This function may be called more than once. */
|
|
s = bfd_get_linker_section (abfd, ".got");
|
|
if (s != NULL)
|
|
return TRUE;
|
|
|
|
flags = bed->dynamic_sec_flags;
|
|
|
|
s = bfd_make_section_anyway_with_flags (abfd,
|
|
(bed->rela_plts_and_copies_p
|
|
? ".rela.got" : ".rel.got"),
|
|
(bed->dynamic_sec_flags
|
|
| SEC_READONLY));
|
|
if (s == NULL
|
|
|| ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
|
|
return FALSE;
|
|
htab->srelgot = s;
|
|
|
|
s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
|
|
if (s == NULL
|
|
|| !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
|
|
return FALSE;
|
|
htab->sgot = s;
|
|
htab->sgot->size += GOT_ENTRY_SIZE;
|
|
|
|
if (bed->want_got_sym)
|
|
{
|
|
/* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
|
|
(or .got.plt) section. We don't do this in the linker script
|
|
because we don't want to define the symbol if we are not creating
|
|
a global offset table. */
|
|
h = _bfd_elf_define_linkage_sym (abfd, info, s,
|
|
"_GLOBAL_OFFSET_TABLE_");
|
|
elf_hash_table (info)->hgot = h;
|
|
if (h == NULL)
|
|
return FALSE;
|
|
}
|
|
|
|
if (bed->want_got_plt)
|
|
{
|
|
s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
|
|
if (s == NULL
|
|
|| !bfd_set_section_alignment (abfd, s,
|
|
bed->s->log_file_align))
|
|
return FALSE;
|
|
htab->sgotplt = s;
|
|
}
|
|
|
|
/* The first bit of the global offset table is the header. */
|
|
s->size += bed->got_header_size;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Look through the relocs for a section during the first phase. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
|
|
asection *sec, const Elf_Internal_Rela *relocs)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
const Elf_Internal_Rela *rel;
|
|
const Elf_Internal_Rela *rel_end;
|
|
asection *sreloc;
|
|
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
BFD_ASSERT (is_aarch64_elf (abfd));
|
|
|
|
htab = elf_aarch64_hash_table (info);
|
|
sreloc = NULL;
|
|
|
|
symtab_hdr = &elf_symtab_hdr (abfd);
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
|
|
rel_end = relocs + sec->reloc_count;
|
|
for (rel = relocs; rel < rel_end; rel++)
|
|
{
|
|
struct elf_link_hash_entry *h;
|
|
unsigned long r_symndx;
|
|
unsigned int r_type;
|
|
bfd_reloc_code_real_type bfd_r_type;
|
|
Elf_Internal_Sym *isym;
|
|
|
|
r_symndx = ELFNN_R_SYM (rel->r_info);
|
|
r_type = ELFNN_R_TYPE (rel->r_info);
|
|
|
|
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
|
|
{
|
|
(*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
|
|
r_symndx);
|
|
return FALSE;
|
|
}
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
/* A local symbol. */
|
|
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
|
|
abfd, r_symndx);
|
|
if (isym == NULL)
|
|
return FALSE;
|
|
|
|
/* Check relocation against local STT_GNU_IFUNC symbol. */
|
|
if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
|
|
{
|
|
h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
|
|
TRUE);
|
|
if (h == NULL)
|
|
return FALSE;
|
|
|
|
/* Fake a STT_GNU_IFUNC symbol. */
|
|
h->type = STT_GNU_IFUNC;
|
|
h->def_regular = 1;
|
|
h->ref_regular = 1;
|
|
h->forced_local = 1;
|
|
h->root.type = bfd_link_hash_defined;
|
|
}
|
|
else
|
|
h = NULL;
|
|
}
|
|
else
|
|
{
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
|
|
/* PR15323, ref flags aren't set for references in the same
|
|
object. */
|
|
h->root.non_ir_ref = 1;
|
|
}
|
|
|
|
/* Could be done earlier, if h were already available. */
|
|
bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
|
|
|
|
if (h != NULL)
|
|
{
|
|
/* Create the ifunc sections for static executables. If we
|
|
never see an indirect function symbol nor we are building
|
|
a static executable, those sections will be empty and
|
|
won't appear in output. */
|
|
switch (bfd_r_type)
|
|
{
|
|
default:
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_NN:
|
|
case BFD_RELOC_AARCH64_CALL26:
|
|
case BFD_RELOC_AARCH64_JUMP26:
|
|
case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
|
|
case BFD_RELOC_AARCH64_GOT_LD_PREL19:
|
|
case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
|
|
case BFD_RELOC_AARCH64_ADD_LO12:
|
|
if (htab->root.dynobj == NULL)
|
|
htab->root.dynobj = abfd;
|
|
if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
|
|
return FALSE;
|
|
break;
|
|
}
|
|
|
|
/* It is referenced by a non-shared object. */
|
|
h->ref_regular = 1;
|
|
h->root.non_ir_ref = 1;
|
|
}
|
|
|
|
switch (bfd_r_type)
|
|
{
|
|
case BFD_RELOC_AARCH64_NN:
|
|
|
|
/* We don't need to handle relocs into sections not going into
|
|
the "real" output. */
|
|
if ((sec->flags & SEC_ALLOC) == 0)
|
|
break;
|
|
|
|
if (h != NULL)
|
|
{
|
|
if (!info->shared)
|
|
h->non_got_ref = 1;
|
|
|
|
h->plt.refcount += 1;
|
|
h->pointer_equality_needed = 1;
|
|
}
|
|
|
|
/* No need to do anything if we're not creating a shared
|
|
object. */
|
|
if (! info->shared)
|
|
break;
|
|
|
|
{
|
|
struct elf_dyn_relocs *p;
|
|
struct elf_dyn_relocs **head;
|
|
|
|
/* We must copy these reloc types into the output file.
|
|
Create a reloc section in dynobj and make room for
|
|
this reloc. */
|
|
if (sreloc == NULL)
|
|
{
|
|
if (htab->root.dynobj == NULL)
|
|
htab->root.dynobj = abfd;
|
|
|
|
sreloc = _bfd_elf_make_dynamic_reloc_section
|
|
(sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
|
|
|
|
if (sreloc == NULL)
|
|
return FALSE;
|
|
}
|
|
|
|
/* If this is a global symbol, we count the number of
|
|
relocations we need for this symbol. */
|
|
if (h != NULL)
|
|
{
|
|
struct elf_aarch64_link_hash_entry *eh;
|
|
eh = (struct elf_aarch64_link_hash_entry *) h;
|
|
head = &eh->dyn_relocs;
|
|
}
|
|
else
|
|
{
|
|
/* Track dynamic relocs needed for local syms too.
|
|
We really need local syms available to do this
|
|
easily. Oh well. */
|
|
|
|
asection *s;
|
|
void **vpp;
|
|
|
|
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
|
|
abfd, r_symndx);
|
|
if (isym == NULL)
|
|
return FALSE;
|
|
|
|
s = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
|
if (s == NULL)
|
|
s = sec;
|
|
|
|
/* Beware of type punned pointers vs strict aliasing
|
|
rules. */
|
|
vpp = &(elf_section_data (s)->local_dynrel);
|
|
head = (struct elf_dyn_relocs **) vpp;
|
|
}
|
|
|
|
p = *head;
|
|
if (p == NULL || p->sec != sec)
|
|
{
|
|
bfd_size_type amt = sizeof *p;
|
|
p = ((struct elf_dyn_relocs *)
|
|
bfd_zalloc (htab->root.dynobj, amt));
|
|
if (p == NULL)
|
|
return FALSE;
|
|
p->next = *head;
|
|
*head = p;
|
|
p->sec = sec;
|
|
}
|
|
|
|
p->count += 1;
|
|
|
|
}
|
|
break;
|
|
|
|
/* RR: We probably want to keep a consistency check that
|
|
there are no dangling GOT_PAGE relocs. */
|
|
case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
|
|
case BFD_RELOC_AARCH64_GOT_LD_PREL19:
|
|
case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
|
|
case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
|
|
case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
|
|
case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
|
|
{
|
|
unsigned got_type;
|
|
unsigned old_got_type;
|
|
|
|
got_type = aarch64_reloc_got_type (bfd_r_type);
|
|
|
|
if (h)
|
|
{
|
|
h->got.refcount += 1;
|
|
old_got_type = elf_aarch64_hash_entry (h)->got_type;
|
|
}
|
|
else
|
|
{
|
|
struct elf_aarch64_local_symbol *locals;
|
|
|
|
if (!elfNN_aarch64_allocate_local_symbols
|
|
(abfd, symtab_hdr->sh_info))
|
|
return FALSE;
|
|
|
|
locals = elf_aarch64_locals (abfd);
|
|
BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
|
|
locals[r_symndx].got_refcount += 1;
|
|
old_got_type = locals[r_symndx].got_type;
|
|
}
|
|
|
|
/* If a variable is accessed with both general dynamic TLS
|
|
methods, two slots may be created. */
|
|
if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
|
|
got_type |= old_got_type;
|
|
|
|
/* We will already have issued an error message if there
|
|
is a TLS/non-TLS mismatch, based on the symbol type.
|
|
So just combine any TLS types needed. */
|
|
if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
|
|
&& got_type != GOT_NORMAL)
|
|
got_type |= old_got_type;
|
|
|
|
/* If the symbol is accessed by both IE and GD methods, we
|
|
are able to relax. Turn off the GD flag, without
|
|
messing up with any other kind of TLS types that may be
|
|
involved. */
|
|
if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
|
|
got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
|
|
|
|
if (old_got_type != got_type)
|
|
{
|
|
if (h != NULL)
|
|
elf_aarch64_hash_entry (h)->got_type = got_type;
|
|
else
|
|
{
|
|
struct elf_aarch64_local_symbol *locals;
|
|
locals = elf_aarch64_locals (abfd);
|
|
BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
|
|
locals[r_symndx].got_type = got_type;
|
|
}
|
|
}
|
|
|
|
if (htab->root.dynobj == NULL)
|
|
htab->root.dynobj = abfd;
|
|
if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
|
|
return FALSE;
|
|
break;
|
|
}
|
|
|
|
case BFD_RELOC_AARCH64_MOVW_G0_NC:
|
|
case BFD_RELOC_AARCH64_MOVW_G1_NC:
|
|
case BFD_RELOC_AARCH64_MOVW_G2_NC:
|
|
case BFD_RELOC_AARCH64_MOVW_G3:
|
|
if (info->shared)
|
|
{
|
|
int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
|
|
(*_bfd_error_handler)
|
|
(_("%B: relocation %s against `%s' can not be used when making "
|
|
"a shared object; recompile with -fPIC"),
|
|
abfd, elfNN_aarch64_howto_table[howto_index].name,
|
|
(h) ? h->root.root.string : "a local symbol");
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return FALSE;
|
|
}
|
|
|
|
case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
|
|
case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
|
|
case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
|
|
if (h != NULL && info->executable)
|
|
{
|
|
/* If this reloc is in a read-only section, we might
|
|
need a copy reloc. We can't check reliably at this
|
|
stage whether the section is read-only, as input
|
|
sections have not yet been mapped to output sections.
|
|
Tentatively set the flag for now, and correct in
|
|
adjust_dynamic_symbol. */
|
|
h->non_got_ref = 1;
|
|
h->plt.refcount += 1;
|
|
h->pointer_equality_needed = 1;
|
|
}
|
|
/* FIXME:: RR need to handle these in shared libraries
|
|
and essentially bomb out as these being non-PIC
|
|
relocations in shared libraries. */
|
|
break;
|
|
|
|
case BFD_RELOC_AARCH64_CALL26:
|
|
case BFD_RELOC_AARCH64_JUMP26:
|
|
/* If this is a local symbol then we resolve it
|
|
directly without creating a PLT entry. */
|
|
if (h == NULL)
|
|
continue;
|
|
|
|
h->needs_plt = 1;
|
|
if (h->plt.refcount <= 0)
|
|
h->plt.refcount = 1;
|
|
else
|
|
h->plt.refcount += 1;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Treat mapping symbols as special target symbols. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
|
|
asymbol *sym)
|
|
{
|
|
return bfd_is_aarch64_special_symbol_name (sym->name,
|
|
BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
|
|
}
|
|
|
|
/* This is a copy of elf_find_function () from elf.c except that
|
|
AArch64 mapping symbols are ignored when looking for function names. */
|
|
|
|
static bfd_boolean
|
|
aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
|
|
asymbol **symbols,
|
|
asection *section,
|
|
bfd_vma offset,
|
|
const char **filename_ptr,
|
|
const char **functionname_ptr)
|
|
{
|
|
const char *filename = NULL;
|
|
asymbol *func = NULL;
|
|
bfd_vma low_func = 0;
|
|
asymbol **p;
|
|
|
|
for (p = symbols; *p != NULL; p++)
|
|
{
|
|
elf_symbol_type *q;
|
|
|
|
q = (elf_symbol_type *) * p;
|
|
|
|
switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
|
|
{
|
|
default:
|
|
break;
|
|
case STT_FILE:
|
|
filename = bfd_asymbol_name (&q->symbol);
|
|
break;
|
|
case STT_FUNC:
|
|
case STT_NOTYPE:
|
|
/* Skip mapping symbols. */
|
|
if ((q->symbol.flags & BSF_LOCAL)
|
|
&& (bfd_is_aarch64_special_symbol_name
|
|
(q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
|
|
continue;
|
|
/* Fall through. */
|
|
if (bfd_get_section (&q->symbol) == section
|
|
&& q->symbol.value >= low_func && q->symbol.value <= offset)
|
|
{
|
|
func = (asymbol *) q;
|
|
low_func = q->symbol.value;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (func == NULL)
|
|
return FALSE;
|
|
|
|
if (filename_ptr)
|
|
*filename_ptr = filename;
|
|
if (functionname_ptr)
|
|
*functionname_ptr = bfd_asymbol_name (func);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Find the nearest line to a particular section and offset, for error
|
|
reporting. This code is a duplicate of the code in elf.c, except
|
|
that it uses aarch64_elf_find_function. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_find_nearest_line (bfd *abfd,
|
|
asymbol **symbols,
|
|
asection *section,
|
|
bfd_vma offset,
|
|
const char **filename_ptr,
|
|
const char **functionname_ptr,
|
|
unsigned int *line_ptr,
|
|
unsigned int *discriminator_ptr)
|
|
{
|
|
bfd_boolean found = FALSE;
|
|
|
|
if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
|
|
filename_ptr, functionname_ptr,
|
|
line_ptr, discriminator_ptr,
|
|
dwarf_debug_sections, 0,
|
|
&elf_tdata (abfd)->dwarf2_find_line_info))
|
|
{
|
|
if (!*functionname_ptr)
|
|
aarch64_elf_find_function (abfd, symbols, section, offset,
|
|
*filename_ptr ? NULL : filename_ptr,
|
|
functionname_ptr);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
|
|
toolchain uses DWARF1. */
|
|
|
|
if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
|
|
&found, filename_ptr,
|
|
functionname_ptr, line_ptr,
|
|
&elf_tdata (abfd)->line_info))
|
|
return FALSE;
|
|
|
|
if (found && (*functionname_ptr || *line_ptr))
|
|
return TRUE;
|
|
|
|
if (symbols == NULL)
|
|
return FALSE;
|
|
|
|
if (!aarch64_elf_find_function (abfd, symbols, section, offset,
|
|
filename_ptr, functionname_ptr))
|
|
return FALSE;
|
|
|
|
*line_ptr = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_find_inliner_info (bfd *abfd,
|
|
const char **filename_ptr,
|
|
const char **functionname_ptr,
|
|
unsigned int *line_ptr)
|
|
{
|
|
bfd_boolean found;
|
|
found = _bfd_dwarf2_find_inliner_info
|
|
(abfd, filename_ptr,
|
|
functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
|
|
return found;
|
|
}
|
|
|
|
|
|
static void
|
|
elfNN_aarch64_post_process_headers (bfd *abfd,
|
|
struct bfd_link_info *link_info)
|
|
{
|
|
Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
|
|
|
|
i_ehdrp = elf_elfheader (abfd);
|
|
i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
|
|
|
|
_bfd_elf_post_process_headers (abfd, link_info);
|
|
}
|
|
|
|
static enum elf_reloc_type_class
|
|
elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
|
const asection *rel_sec ATTRIBUTE_UNUSED,
|
|
const Elf_Internal_Rela *rela)
|
|
{
|
|
switch ((int) ELFNN_R_TYPE (rela->r_info))
|
|
{
|
|
case AARCH64_R (RELATIVE):
|
|
return reloc_class_relative;
|
|
case AARCH64_R (JUMP_SLOT):
|
|
return reloc_class_plt;
|
|
case AARCH64_R (COPY):
|
|
return reloc_class_copy;
|
|
default:
|
|
return reloc_class_normal;
|
|
}
|
|
}
|
|
|
|
/* Handle an AArch64 specific section when reading an object file. This is
|
|
called when bfd_section_from_shdr finds a section with an unknown
|
|
type. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_section_from_shdr (bfd *abfd,
|
|
Elf_Internal_Shdr *hdr,
|
|
const char *name, int shindex)
|
|
{
|
|
/* There ought to be a place to keep ELF backend specific flags, but
|
|
at the moment there isn't one. We just keep track of the
|
|
sections by their name, instead. Fortunately, the ABI gives
|
|
names for all the AArch64 specific sections, so we will probably get
|
|
away with this. */
|
|
switch (hdr->sh_type)
|
|
{
|
|
case SHT_AARCH64_ATTRIBUTES:
|
|
break;
|
|
|
|
default:
|
|
return FALSE;
|
|
}
|
|
|
|
if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* A structure used to record a list of sections, independently
|
|
of the next and prev fields in the asection structure. */
|
|
typedef struct section_list
|
|
{
|
|
asection *sec;
|
|
struct section_list *next;
|
|
struct section_list *prev;
|
|
}
|
|
section_list;
|
|
|
|
/* Unfortunately we need to keep a list of sections for which
|
|
an _aarch64_elf_section_data structure has been allocated. This
|
|
is because it is possible for functions like elfNN_aarch64_write_section
|
|
to be called on a section which has had an elf_data_structure
|
|
allocated for it (and so the used_by_bfd field is valid) but
|
|
for which the AArch64 extended version of this structure - the
|
|
_aarch64_elf_section_data structure - has not been allocated. */
|
|
static section_list *sections_with_aarch64_elf_section_data = NULL;
|
|
|
|
static void
|
|
record_section_with_aarch64_elf_section_data (asection *sec)
|
|
{
|
|
struct section_list *entry;
|
|
|
|
entry = bfd_malloc (sizeof (*entry));
|
|
if (entry == NULL)
|
|
return;
|
|
entry->sec = sec;
|
|
entry->next = sections_with_aarch64_elf_section_data;
|
|
entry->prev = NULL;
|
|
if (entry->next != NULL)
|
|
entry->next->prev = entry;
|
|
sections_with_aarch64_elf_section_data = entry;
|
|
}
|
|
|
|
static struct section_list *
|
|
find_aarch64_elf_section_entry (asection *sec)
|
|
{
|
|
struct section_list *entry;
|
|
static struct section_list *last_entry = NULL;
|
|
|
|
/* This is a short cut for the typical case where the sections are added
|
|
to the sections_with_aarch64_elf_section_data list in forward order and
|
|
then looked up here in backwards order. This makes a real difference
|
|
to the ld-srec/sec64k.exp linker test. */
|
|
entry = sections_with_aarch64_elf_section_data;
|
|
if (last_entry != NULL)
|
|
{
|
|
if (last_entry->sec == sec)
|
|
entry = last_entry;
|
|
else if (last_entry->next != NULL && last_entry->next->sec == sec)
|
|
entry = last_entry->next;
|
|
}
|
|
|
|
for (; entry; entry = entry->next)
|
|
if (entry->sec == sec)
|
|
break;
|
|
|
|
if (entry)
|
|
/* Record the entry prior to this one - it is the entry we are
|
|
most likely to want to locate next time. Also this way if we
|
|
have been called from
|
|
unrecord_section_with_aarch64_elf_section_data () we will not
|
|
be caching a pointer that is about to be freed. */
|
|
last_entry = entry->prev;
|
|
|
|
return entry;
|
|
}
|
|
|
|
static void
|
|
unrecord_section_with_aarch64_elf_section_data (asection *sec)
|
|
{
|
|
struct section_list *entry;
|
|
|
|
entry = find_aarch64_elf_section_entry (sec);
|
|
|
|
if (entry)
|
|
{
|
|
if (entry->prev != NULL)
|
|
entry->prev->next = entry->next;
|
|
if (entry->next != NULL)
|
|
entry->next->prev = entry->prev;
|
|
if (entry == sections_with_aarch64_elf_section_data)
|
|
sections_with_aarch64_elf_section_data = entry->next;
|
|
free (entry);
|
|
}
|
|
}
|
|
|
|
|
|
typedef struct
|
|
{
|
|
void *finfo;
|
|
struct bfd_link_info *info;
|
|
asection *sec;
|
|
int sec_shndx;
|
|
int (*func) (void *, const char *, Elf_Internal_Sym *,
|
|
asection *, struct elf_link_hash_entry *);
|
|
} output_arch_syminfo;
|
|
|
|
enum map_symbol_type
|
|
{
|
|
AARCH64_MAP_INSN,
|
|
AARCH64_MAP_DATA
|
|
};
|
|
|
|
|
|
/* Output a single mapping symbol. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
|
|
enum map_symbol_type type, bfd_vma offset)
|
|
{
|
|
static const char *names[2] = { "$x", "$d" };
|
|
Elf_Internal_Sym sym;
|
|
|
|
sym.st_value = (osi->sec->output_section->vma
|
|
+ osi->sec->output_offset + offset);
|
|
sym.st_size = 0;
|
|
sym.st_other = 0;
|
|
sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
|
|
sym.st_shndx = osi->sec_shndx;
|
|
return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
|
|
}
|
|
|
|
|
|
|
|
/* Output mapping symbols for PLT entries associated with H. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf)
|
|
{
|
|
output_arch_syminfo *osi = (output_arch_syminfo *) inf;
|
|
bfd_vma addr;
|
|
|
|
if (h->root.type == bfd_link_hash_indirect)
|
|
return TRUE;
|
|
|
|
if (h->root.type == bfd_link_hash_warning)
|
|
/* When warning symbols are created, they **replace** the "real"
|
|
entry in the hash table, thus we never get to see the real
|
|
symbol in a hash traversal. So look at it now. */
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
|
|
if (h->plt.offset == (bfd_vma) - 1)
|
|
return TRUE;
|
|
|
|
addr = h->plt.offset;
|
|
if (addr == 32)
|
|
{
|
|
if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Output a single local symbol for a generated stub. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
|
|
bfd_vma offset, bfd_vma size)
|
|
{
|
|
Elf_Internal_Sym sym;
|
|
|
|
sym.st_value = (osi->sec->output_section->vma
|
|
+ osi->sec->output_offset + offset);
|
|
sym.st_size = size;
|
|
sym.st_other = 0;
|
|
sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
|
|
sym.st_shndx = osi->sec_shndx;
|
|
return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
|
|
}
|
|
|
|
static bfd_boolean
|
|
aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
|
|
{
|
|
struct elf_aarch64_stub_hash_entry *stub_entry;
|
|
asection *stub_sec;
|
|
bfd_vma addr;
|
|
char *stub_name;
|
|
output_arch_syminfo *osi;
|
|
|
|
/* Massage our args to the form they really have. */
|
|
stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
|
|
osi = (output_arch_syminfo *) in_arg;
|
|
|
|
stub_sec = stub_entry->stub_sec;
|
|
|
|
/* Ensure this stub is attached to the current section being
|
|
processed. */
|
|
if (stub_sec != osi->sec)
|
|
return TRUE;
|
|
|
|
addr = (bfd_vma) stub_entry->stub_offset;
|
|
|
|
stub_name = stub_entry->output_name;
|
|
|
|
switch (stub_entry->stub_type)
|
|
{
|
|
case aarch64_stub_adrp_branch:
|
|
if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
|
|
sizeof (aarch64_adrp_branch_stub)))
|
|
return FALSE;
|
|
if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
|
|
return FALSE;
|
|
break;
|
|
case aarch64_stub_long_branch:
|
|
if (!elfNN_aarch64_output_stub_sym
|
|
(osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
|
|
return FALSE;
|
|
if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
|
|
return FALSE;
|
|
if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
|
|
return FALSE;
|
|
break;
|
|
case aarch64_stub_erratum_835769_veneer:
|
|
if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
|
|
sizeof (aarch64_erratum_835769_stub)))
|
|
return FALSE;
|
|
if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
|
|
return FALSE;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Output mapping symbols for linker generated sections. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
|
|
struct bfd_link_info *info,
|
|
void *finfo,
|
|
int (*func) (void *, const char *,
|
|
Elf_Internal_Sym *,
|
|
asection *,
|
|
struct elf_link_hash_entry
|
|
*))
|
|
{
|
|
output_arch_syminfo osi;
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
|
|
htab = elf_aarch64_hash_table (info);
|
|
|
|
osi.finfo = finfo;
|
|
osi.info = info;
|
|
osi.func = func;
|
|
|
|
/* Long calls stubs. */
|
|
if (htab->stub_bfd && htab->stub_bfd->sections)
|
|
{
|
|
asection *stub_sec;
|
|
|
|
for (stub_sec = htab->stub_bfd->sections;
|
|
stub_sec != NULL; stub_sec = stub_sec->next)
|
|
{
|
|
/* Ignore non-stub sections. */
|
|
if (!strstr (stub_sec->name, STUB_SUFFIX))
|
|
continue;
|
|
|
|
osi.sec = stub_sec;
|
|
|
|
osi.sec_shndx = _bfd_elf_section_from_bfd_section
|
|
(output_bfd, osi.sec->output_section);
|
|
|
|
bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
|
|
&osi);
|
|
}
|
|
}
|
|
|
|
/* Finally, output mapping symbols for the PLT. */
|
|
if (!htab->root.splt || htab->root.splt->size == 0)
|
|
return TRUE;
|
|
|
|
/* For now live without mapping symbols for the plt. */
|
|
osi.sec_shndx = _bfd_elf_section_from_bfd_section
|
|
(output_bfd, htab->root.splt->output_section);
|
|
osi.sec = htab->root.splt;
|
|
|
|
elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map,
|
|
(void *) &osi);
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
/* Allocate target specific section data. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
|
|
{
|
|
if (!sec->used_by_bfd)
|
|
{
|
|
_aarch64_elf_section_data *sdata;
|
|
bfd_size_type amt = sizeof (*sdata);
|
|
|
|
sdata = bfd_zalloc (abfd, amt);
|
|
if (sdata == NULL)
|
|
return FALSE;
|
|
sec->used_by_bfd = sdata;
|
|
}
|
|
|
|
record_section_with_aarch64_elf_section_data (sec);
|
|
|
|
return _bfd_elf_new_section_hook (abfd, sec);
|
|
}
|
|
|
|
|
|
static void
|
|
unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
|
|
asection *sec,
|
|
void *ignore ATTRIBUTE_UNUSED)
|
|
{
|
|
unrecord_section_with_aarch64_elf_section_data (sec);
|
|
}
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_close_and_cleanup (bfd *abfd)
|
|
{
|
|
if (abfd->sections)
|
|
bfd_map_over_sections (abfd,
|
|
unrecord_section_via_map_over_sections, NULL);
|
|
|
|
return _bfd_elf_close_and_cleanup (abfd);
|
|
}
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
|
|
{
|
|
if (abfd->sections)
|
|
bfd_map_over_sections (abfd,
|
|
unrecord_section_via_map_over_sections, NULL);
|
|
|
|
return _bfd_free_cached_info (abfd);
|
|
}
|
|
|
|
/* Create dynamic sections. This is different from the ARM backend in that
|
|
the got, plt, gotplt and their relocation sections are all created in the
|
|
standard part of the bfd elf backend. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
|
|
struct bfd_link_info *info)
|
|
{
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
|
|
/* We need to create .got section. */
|
|
if (!aarch64_elf_create_got_section (dynobj, info))
|
|
return FALSE;
|
|
|
|
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
|
|
return FALSE;
|
|
|
|
htab = elf_aarch64_hash_table (info);
|
|
htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
|
|
if (!info->shared)
|
|
htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
|
|
|
|
if (!htab->sdynbss || (!info->shared && !htab->srelbss))
|
|
abort ();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Allocate space in .plt, .got and associated reloc sections for
|
|
dynamic relocs. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
|
|
{
|
|
struct bfd_link_info *info;
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
struct elf_aarch64_link_hash_entry *eh;
|
|
struct elf_dyn_relocs *p;
|
|
|
|
/* An example of a bfd_link_hash_indirect symbol is versioned
|
|
symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
|
|
-> __gxx_personality_v0(bfd_link_hash_defined)
|
|
|
|
There is no need to process bfd_link_hash_indirect symbols here
|
|
because we will also be presented with the concrete instance of
|
|
the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
|
|
called to copy all relevant data from the generic to the concrete
|
|
symbol instance.
|
|
*/
|
|
if (h->root.type == bfd_link_hash_indirect)
|
|
return TRUE;
|
|
|
|
if (h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
|
|
info = (struct bfd_link_info *) inf;
|
|
htab = elf_aarch64_hash_table (info);
|
|
|
|
/* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
|
|
here if it is defined and referenced in a non-shared object. */
|
|
if (h->type == STT_GNU_IFUNC
|
|
&& h->def_regular)
|
|
return TRUE;
|
|
else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
|
|
{
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1 && !h->forced_local)
|
|
{
|
|
if (!bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
|
|
{
|
|
asection *s = htab->root.splt;
|
|
|
|
/* If this is the first .plt entry, make room for the special
|
|
first entry. */
|
|
if (s->size == 0)
|
|
s->size += htab->plt_header_size;
|
|
|
|
h->plt.offset = s->size;
|
|
|
|
/* If this symbol is not defined in a regular file, and we are
|
|
not generating a shared library, then set the symbol to this
|
|
location in the .plt. This is required to make function
|
|
pointers compare as equal between the normal executable and
|
|
the shared library. */
|
|
if (!info->shared && !h->def_regular)
|
|
{
|
|
h->root.u.def.section = s;
|
|
h->root.u.def.value = h->plt.offset;
|
|
}
|
|
|
|
/* Make room for this entry. For now we only create the
|
|
small model PLT entries. We later need to find a way
|
|
of relaxing into these from the large model PLT entries. */
|
|
s->size += PLT_SMALL_ENTRY_SIZE;
|
|
|
|
/* We also need to make an entry in the .got.plt section, which
|
|
will be placed in the .got section by the linker script. */
|
|
htab->root.sgotplt->size += GOT_ENTRY_SIZE;
|
|
|
|
/* We also need to make an entry in the .rela.plt section. */
|
|
htab->root.srelplt->size += RELOC_SIZE (htab);
|
|
|
|
/* We need to ensure that all GOT entries that serve the PLT
|
|
are consecutive with the special GOT slots [0] [1] and
|
|
[2]. Any addtional relocations, such as
|
|
R_AARCH64_TLSDESC, must be placed after the PLT related
|
|
entries. We abuse the reloc_count such that during
|
|
sizing we adjust reloc_count to indicate the number of
|
|
PLT related reserved entries. In subsequent phases when
|
|
filling in the contents of the reloc entries, PLT related
|
|
entries are placed by computing their PLT index (0
|
|
.. reloc_count). While other none PLT relocs are placed
|
|
at the slot indicated by reloc_count and reloc_count is
|
|
updated. */
|
|
|
|
htab->root.srelplt->reloc_count++;
|
|
}
|
|
else
|
|
{
|
|
h->plt.offset = (bfd_vma) - 1;
|
|
h->needs_plt = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
h->plt.offset = (bfd_vma) - 1;
|
|
h->needs_plt = 0;
|
|
}
|
|
|
|
eh = (struct elf_aarch64_link_hash_entry *) h;
|
|
eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
|
|
|
|
if (h->got.refcount > 0)
|
|
{
|
|
bfd_boolean dyn;
|
|
unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
|
|
|
|
h->got.offset = (bfd_vma) - 1;
|
|
|
|
dyn = htab->root.dynamic_sections_created;
|
|
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (dyn && h->dynindx == -1 && !h->forced_local)
|
|
{
|
|
if (!bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
if (got_type == GOT_UNKNOWN)
|
|
{
|
|
}
|
|
else if (got_type == GOT_NORMAL)
|
|
{
|
|
h->got.offset = htab->root.sgot->size;
|
|
htab->root.sgot->size += GOT_ENTRY_SIZE;
|
|
if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
|
&& (info->shared
|
|
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
|
|
{
|
|
htab->root.srelgot->size += RELOC_SIZE (htab);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
int indx;
|
|
if (got_type & GOT_TLSDESC_GD)
|
|
{
|
|
eh->tlsdesc_got_jump_table_offset =
|
|
(htab->root.sgotplt->size
|
|
- aarch64_compute_jump_table_size (htab));
|
|
htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
|
|
h->got.offset = (bfd_vma) - 2;
|
|
}
|
|
|
|
if (got_type & GOT_TLS_GD)
|
|
{
|
|
h->got.offset = htab->root.sgot->size;
|
|
htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
|
|
}
|
|
|
|
if (got_type & GOT_TLS_IE)
|
|
{
|
|
h->got.offset = htab->root.sgot->size;
|
|
htab->root.sgot->size += GOT_ENTRY_SIZE;
|
|
}
|
|
|
|
indx = h && h->dynindx != -1 ? h->dynindx : 0;
|
|
if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
|
|| h->root.type != bfd_link_hash_undefweak)
|
|
&& (info->shared
|
|
|| indx != 0
|
|
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
|
|
{
|
|
if (got_type & GOT_TLSDESC_GD)
|
|
{
|
|
htab->root.srelplt->size += RELOC_SIZE (htab);
|
|
/* Note reloc_count not incremented here! We have
|
|
already adjusted reloc_count for this relocation
|
|
type. */
|
|
|
|
/* TLSDESC PLT is now needed, but not yet determined. */
|
|
htab->tlsdesc_plt = (bfd_vma) - 1;
|
|
}
|
|
|
|
if (got_type & GOT_TLS_GD)
|
|
htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
|
|
|
|
if (got_type & GOT_TLS_IE)
|
|
htab->root.srelgot->size += RELOC_SIZE (htab);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
h->got.offset = (bfd_vma) - 1;
|
|
}
|
|
|
|
if (eh->dyn_relocs == NULL)
|
|
return TRUE;
|
|
|
|
/* In the shared -Bsymbolic case, discard space allocated for
|
|
dynamic pc-relative relocs against symbols which turn out to be
|
|
defined in regular objects. For the normal shared case, discard
|
|
space for pc-relative relocs that have become local due to symbol
|
|
visibility changes. */
|
|
|
|
if (info->shared)
|
|
{
|
|
/* Relocs that use pc_count are those that appear on a call
|
|
insn, or certain REL relocs that can generated via assembly.
|
|
We want calls to protected symbols to resolve directly to the
|
|
function rather than going via the plt. If people want
|
|
function pointer comparisons to work as expected then they
|
|
should avoid writing weird assembly. */
|
|
if (SYMBOL_CALLS_LOCAL (info, h))
|
|
{
|
|
struct elf_dyn_relocs **pp;
|
|
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
|
|
{
|
|
p->count -= p->pc_count;
|
|
p->pc_count = 0;
|
|
if (p->count == 0)
|
|
*pp = p->next;
|
|
else
|
|
pp = &p->next;
|
|
}
|
|
}
|
|
|
|
/* Also discard relocs on undefined weak syms with non-default
|
|
visibility. */
|
|
if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
|
|
{
|
|
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
|
|
eh->dyn_relocs = NULL;
|
|
|
|
/* Make sure undefined weak symbols are output as a dynamic
|
|
symbol in PIEs. */
|
|
else if (h->dynindx == -1
|
|
&& !h->forced_local
|
|
&& !bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
}
|
|
else if (ELIMINATE_COPY_RELOCS)
|
|
{
|
|
/* For the non-shared case, discard space for relocs against
|
|
symbols which turn out to need copy relocs or are not
|
|
dynamic. */
|
|
|
|
if (!h->non_got_ref
|
|
&& ((h->def_dynamic
|
|
&& !h->def_regular)
|
|
|| (htab->root.dynamic_sections_created
|
|
&& (h->root.type == bfd_link_hash_undefweak
|
|
|| h->root.type == bfd_link_hash_undefined))))
|
|
{
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1
|
|
&& !h->forced_local
|
|
&& !bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
|
|
/* If that succeeded, we know we'll be keeping all the
|
|
relocs. */
|
|
if (h->dynindx != -1)
|
|
goto keep;
|
|
}
|
|
|
|
eh->dyn_relocs = NULL;
|
|
|
|
keep:;
|
|
}
|
|
|
|
/* Finally, allocate space. */
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
|
{
|
|
asection *sreloc;
|
|
|
|
sreloc = elf_section_data (p->sec)->sreloc;
|
|
|
|
BFD_ASSERT (sreloc != NULL);
|
|
|
|
sreloc->size += p->count * RELOC_SIZE (htab);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Allocate space in .plt, .got and associated reloc sections for
|
|
ifunc dynamic relocs. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
|
|
void *inf)
|
|
{
|
|
struct bfd_link_info *info;
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
struct elf_aarch64_link_hash_entry *eh;
|
|
|
|
/* An example of a bfd_link_hash_indirect symbol is versioned
|
|
symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
|
|
-> __gxx_personality_v0(bfd_link_hash_defined)
|
|
|
|
There is no need to process bfd_link_hash_indirect symbols here
|
|
because we will also be presented with the concrete instance of
|
|
the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
|
|
called to copy all relevant data from the generic to the concrete
|
|
symbol instance.
|
|
*/
|
|
if (h->root.type == bfd_link_hash_indirect)
|
|
return TRUE;
|
|
|
|
if (h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
|
|
info = (struct bfd_link_info *) inf;
|
|
htab = elf_aarch64_hash_table (info);
|
|
|
|
eh = (struct elf_aarch64_link_hash_entry *) h;
|
|
|
|
/* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
|
|
here if it is defined and referenced in a non-shared object. */
|
|
if (h->type == STT_GNU_IFUNC
|
|
&& h->def_regular)
|
|
return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
|
|
&eh->dyn_relocs,
|
|
htab->plt_entry_size,
|
|
htab->plt_header_size,
|
|
GOT_ENTRY_SIZE);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Allocate space in .plt, .got and associated reloc sections for
|
|
local dynamic relocs. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
|
|
{
|
|
struct elf_link_hash_entry *h
|
|
= (struct elf_link_hash_entry *) *slot;
|
|
|
|
if (h->type != STT_GNU_IFUNC
|
|
|| !h->def_regular
|
|
|| !h->ref_regular
|
|
|| !h->forced_local
|
|
|| h->root.type != bfd_link_hash_defined)
|
|
abort ();
|
|
|
|
return elfNN_aarch64_allocate_dynrelocs (h, inf);
|
|
}
|
|
|
|
/* Allocate space in .plt, .got and associated reloc sections for
|
|
local ifunc dynamic relocs. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
|
|
{
|
|
struct elf_link_hash_entry *h
|
|
= (struct elf_link_hash_entry *) *slot;
|
|
|
|
if (h->type != STT_GNU_IFUNC
|
|
|| !h->def_regular
|
|
|| !h->ref_regular
|
|
|| !h->forced_local
|
|
|| h->root.type != bfd_link_hash_defined)
|
|
abort ();
|
|
|
|
return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
|
|
}
|
|
|
|
/* This is the most important function of all . Innocuosly named
|
|
though ! */
|
|
static bfd_boolean
|
|
elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
|
|
struct bfd_link_info *info)
|
|
{
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
bfd *dynobj;
|
|
asection *s;
|
|
bfd_boolean relocs;
|
|
bfd *ibfd;
|
|
|
|
htab = elf_aarch64_hash_table ((info));
|
|
dynobj = htab->root.dynobj;
|
|
|
|
BFD_ASSERT (dynobj != NULL);
|
|
|
|
if (htab->root.dynamic_sections_created)
|
|
{
|
|
if (info->executable)
|
|
{
|
|
s = bfd_get_linker_section (dynobj, ".interp");
|
|
if (s == NULL)
|
|
abort ();
|
|
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
|
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
|
}
|
|
}
|
|
|
|
/* Set up .got offsets for local syms, and space for local dynamic
|
|
relocs. */
|
|
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
|
|
{
|
|
struct elf_aarch64_local_symbol *locals = NULL;
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
asection *srel;
|
|
unsigned int i;
|
|
|
|
if (!is_aarch64_elf (ibfd))
|
|
continue;
|
|
|
|
for (s = ibfd->sections; s != NULL; s = s->next)
|
|
{
|
|
struct elf_dyn_relocs *p;
|
|
|
|
for (p = (struct elf_dyn_relocs *)
|
|
(elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
|
|
{
|
|
if (!bfd_is_abs_section (p->sec)
|
|
&& bfd_is_abs_section (p->sec->output_section))
|
|
{
|
|
/* Input section has been discarded, either because
|
|
it is a copy of a linkonce section or due to
|
|
linker script /DISCARD/, so we'll be discarding
|
|
the relocs too. */
|
|
}
|
|
else if (p->count != 0)
|
|
{
|
|
srel = elf_section_data (p->sec)->sreloc;
|
|
srel->size += p->count * RELOC_SIZE (htab);
|
|
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
|
|
info->flags |= DF_TEXTREL;
|
|
}
|
|
}
|
|
}
|
|
|
|
locals = elf_aarch64_locals (ibfd);
|
|
if (!locals)
|
|
continue;
|
|
|
|
symtab_hdr = &elf_symtab_hdr (ibfd);
|
|
srel = htab->root.srelgot;
|
|
for (i = 0; i < symtab_hdr->sh_info; i++)
|
|
{
|
|
locals[i].got_offset = (bfd_vma) - 1;
|
|
locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
|
|
if (locals[i].got_refcount > 0)
|
|
{
|
|
unsigned got_type = locals[i].got_type;
|
|
if (got_type & GOT_TLSDESC_GD)
|
|
{
|
|
locals[i].tlsdesc_got_jump_table_offset =
|
|
(htab->root.sgotplt->size
|
|
- aarch64_compute_jump_table_size (htab));
|
|
htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
|
|
locals[i].got_offset = (bfd_vma) - 2;
|
|
}
|
|
|
|
if (got_type & GOT_TLS_GD)
|
|
{
|
|
locals[i].got_offset = htab->root.sgot->size;
|
|
htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
|
|
}
|
|
|
|
if (got_type & GOT_TLS_IE)
|
|
{
|
|
locals[i].got_offset = htab->root.sgot->size;
|
|
htab->root.sgot->size += GOT_ENTRY_SIZE;
|
|
}
|
|
|
|
if (got_type == GOT_UNKNOWN)
|
|
{
|
|
}
|
|
|
|
if (got_type == GOT_NORMAL)
|
|
{
|
|
}
|
|
|
|
if (info->shared)
|
|
{
|
|
if (got_type & GOT_TLSDESC_GD)
|
|
{
|
|
htab->root.srelplt->size += RELOC_SIZE (htab);
|
|
/* Note RELOC_COUNT not incremented here! */
|
|
htab->tlsdesc_plt = (bfd_vma) - 1;
|
|
}
|
|
|
|
if (got_type & GOT_TLS_GD)
|
|
htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
|
|
|
|
if (got_type & GOT_TLS_IE)
|
|
htab->root.srelgot->size += RELOC_SIZE (htab);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
locals[i].got_refcount = (bfd_vma) - 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Allocate global sym .plt and .got entries, and space for global
|
|
sym dynamic relocs. */
|
|
elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
|
|
info);
|
|
|
|
/* Allocate global ifunc sym .plt and .got entries, and space for global
|
|
ifunc sym dynamic relocs. */
|
|
elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
|
|
info);
|
|
|
|
/* Allocate .plt and .got entries, and space for local symbols. */
|
|
htab_traverse (htab->loc_hash_table,
|
|
elfNN_aarch64_allocate_local_dynrelocs,
|
|
info);
|
|
|
|
/* Allocate .plt and .got entries, and space for local ifunc symbols. */
|
|
htab_traverse (htab->loc_hash_table,
|
|
elfNN_aarch64_allocate_local_ifunc_dynrelocs,
|
|
info);
|
|
|
|
/* For every jump slot reserved in the sgotplt, reloc_count is
|
|
incremented. However, when we reserve space for TLS descriptors,
|
|
it's not incremented, so in order to compute the space reserved
|
|
for them, it suffices to multiply the reloc count by the jump
|
|
slot size. */
|
|
|
|
if (htab->root.srelplt)
|
|
htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
|
|
|
|
if (htab->tlsdesc_plt)
|
|
{
|
|
if (htab->root.splt->size == 0)
|
|
htab->root.splt->size += PLT_ENTRY_SIZE;
|
|
|
|
htab->tlsdesc_plt = htab->root.splt->size;
|
|
htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
|
|
|
|
/* If we're not using lazy TLS relocations, don't generate the
|
|
GOT entry required. */
|
|
if (!(info->flags & DF_BIND_NOW))
|
|
{
|
|
htab->dt_tlsdesc_got = htab->root.sgot->size;
|
|
htab->root.sgot->size += GOT_ENTRY_SIZE;
|
|
}
|
|
}
|
|
|
|
/* Init mapping symbols information to use later to distingush between
|
|
code and data while scanning for erratam 835769. */
|
|
if (htab->fix_erratum_835769)
|
|
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
|
|
{
|
|
if (!is_aarch64_elf (ibfd))
|
|
continue;
|
|
bfd_elfNN_aarch64_init_maps (ibfd);
|
|
}
|
|
|
|
/* We now have determined the sizes of the various dynamic sections.
|
|
Allocate memory for them. */
|
|
relocs = FALSE;
|
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
|
{
|
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
|
continue;
|
|
|
|
if (s == htab->root.splt
|
|
|| s == htab->root.sgot
|
|
|| s == htab->root.sgotplt
|
|
|| s == htab->root.iplt
|
|
|| s == htab->root.igotplt || s == htab->sdynbss)
|
|
{
|
|
/* Strip this section if we don't need it; see the
|
|
comment below. */
|
|
}
|
|
else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
|
|
{
|
|
if (s->size != 0 && s != htab->root.srelplt)
|
|
relocs = TRUE;
|
|
|
|
/* We use the reloc_count field as a counter if we need
|
|
to copy relocs into the output file. */
|
|
if (s != htab->root.srelplt)
|
|
s->reloc_count = 0;
|
|
}
|
|
else
|
|
{
|
|
/* It's not one of our sections, so don't allocate space. */
|
|
continue;
|
|
}
|
|
|
|
if (s->size == 0)
|
|
{
|
|
/* If we don't need this section, strip it from the
|
|
output file. This is mostly to handle .rela.bss and
|
|
.rela.plt. We must create both sections in
|
|
create_dynamic_sections, because they must be created
|
|
before the linker maps input sections to output
|
|
sections. The linker does that before
|
|
adjust_dynamic_symbol is called, and it is that
|
|
function which decides whether anything needs to go
|
|
into these sections. */
|
|
|
|
s->flags |= SEC_EXCLUDE;
|
|
continue;
|
|
}
|
|
|
|
if ((s->flags & SEC_HAS_CONTENTS) == 0)
|
|
continue;
|
|
|
|
/* Allocate memory for the section contents. We use bfd_zalloc
|
|
here in case unused entries are not reclaimed before the
|
|
section's contents are written out. This should not happen,
|
|
but this way if it does, we get a R_AARCH64_NONE reloc instead
|
|
of garbage. */
|
|
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
|
|
if (s->contents == NULL)
|
|
return FALSE;
|
|
}
|
|
|
|
if (htab->root.dynamic_sections_created)
|
|
{
|
|
/* Add some entries to the .dynamic section. We fill in the
|
|
values later, in elfNN_aarch64_finish_dynamic_sections, but we
|
|
must add the entries now so that we get the correct size for
|
|
the .dynamic section. The DT_DEBUG entry is filled in by the
|
|
dynamic linker and used by the debugger. */
|
|
#define add_dynamic_entry(TAG, VAL) \
|
|
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
|
|
|
|
if (info->executable)
|
|
{
|
|
if (!add_dynamic_entry (DT_DEBUG, 0))
|
|
return FALSE;
|
|
}
|
|
|
|
if (htab->root.splt->size != 0)
|
|
{
|
|
if (!add_dynamic_entry (DT_PLTGOT, 0)
|
|
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|
|
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|
|
|| !add_dynamic_entry (DT_JMPREL, 0))
|
|
return FALSE;
|
|
|
|
if (htab->tlsdesc_plt
|
|
&& (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
|
|
|| !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
|
|
return FALSE;
|
|
}
|
|
|
|
if (relocs)
|
|
{
|
|
if (!add_dynamic_entry (DT_RELA, 0)
|
|
|| !add_dynamic_entry (DT_RELASZ, 0)
|
|
|| !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
|
|
return FALSE;
|
|
|
|
/* If any dynamic relocs apply to a read-only section,
|
|
then we need a DT_TEXTREL entry. */
|
|
if ((info->flags & DF_TEXTREL) != 0)
|
|
{
|
|
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
#undef add_dynamic_entry
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static inline void
|
|
elf_aarch64_update_plt_entry (bfd *output_bfd,
|
|
bfd_reloc_code_real_type r_type,
|
|
bfd_byte *plt_entry, bfd_vma value)
|
|
{
|
|
reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
|
|
|
|
_bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
|
|
}
|
|
|
|
static void
|
|
elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
|
|
struct elf_aarch64_link_hash_table
|
|
*htab, bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
bfd_byte *plt_entry;
|
|
bfd_vma plt_index;
|
|
bfd_vma got_offset;
|
|
bfd_vma gotplt_entry_address;
|
|
bfd_vma plt_entry_address;
|
|
Elf_Internal_Rela rela;
|
|
bfd_byte *loc;
|
|
asection *plt, *gotplt, *relplt;
|
|
|
|
/* When building a static executable, use .iplt, .igot.plt and
|
|
.rela.iplt sections for STT_GNU_IFUNC symbols. */
|
|
if (htab->root.splt != NULL)
|
|
{
|
|
plt = htab->root.splt;
|
|
gotplt = htab->root.sgotplt;
|
|
relplt = htab->root.srelplt;
|
|
}
|
|
else
|
|
{
|
|
plt = htab->root.iplt;
|
|
gotplt = htab->root.igotplt;
|
|
relplt = htab->root.irelplt;
|
|
}
|
|
|
|
/* Get the index in the procedure linkage table which
|
|
corresponds to this symbol. This is the index of this symbol
|
|
in all the symbols for which we are making plt entries. The
|
|
first entry in the procedure linkage table is reserved.
|
|
|
|
Get the offset into the .got table of the entry that
|
|
corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
|
|
bytes. The first three are reserved for the dynamic linker.
|
|
|
|
For static executables, we don't reserve anything. */
|
|
|
|
if (plt == htab->root.splt)
|
|
{
|
|
plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
|
|
got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
|
|
}
|
|
else
|
|
{
|
|
plt_index = h->plt.offset / htab->plt_entry_size;
|
|
got_offset = plt_index * GOT_ENTRY_SIZE;
|
|
}
|
|
|
|
plt_entry = plt->contents + h->plt.offset;
|
|
plt_entry_address = plt->output_section->vma
|
|
+ plt->output_offset + h->plt.offset;
|
|
gotplt_entry_address = gotplt->output_section->vma +
|
|
gotplt->output_offset + got_offset;
|
|
|
|
/* Copy in the boiler-plate for the PLTn entry. */
|
|
memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
|
|
|
|
/* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
|
|
ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
|
|
elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
|
|
plt_entry,
|
|
PG (gotplt_entry_address) -
|
|
PG (plt_entry_address));
|
|
|
|
/* Fill in the lo12 bits for the load from the pltgot. */
|
|
elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
|
|
plt_entry + 4,
|
|
PG_OFFSET (gotplt_entry_address));
|
|
|
|
/* Fill in the lo12 bits for the add from the pltgot entry. */
|
|
elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
|
|
plt_entry + 8,
|
|
PG_OFFSET (gotplt_entry_address));
|
|
|
|
/* All the GOTPLT Entries are essentially initialized to PLT0. */
|
|
bfd_put_NN (output_bfd,
|
|
plt->output_section->vma + plt->output_offset,
|
|
gotplt->contents + got_offset);
|
|
|
|
rela.r_offset = gotplt_entry_address;
|
|
|
|
if (h->dynindx == -1
|
|
|| ((info->executable
|
|
|| ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
|
|
&& h->def_regular
|
|
&& h->type == STT_GNU_IFUNC))
|
|
{
|
|
/* If an STT_GNU_IFUNC symbol is locally defined, generate
|
|
R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
|
|
rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
|
|
rela.r_addend = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
}
|
|
else
|
|
{
|
|
/* Fill in the entry in the .rela.plt section. */
|
|
rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
|
|
rela.r_addend = 0;
|
|
}
|
|
|
|
/* Compute the relocation entry to used based on PLT index and do
|
|
not adjust reloc_count. The reloc_count has already been adjusted
|
|
to account for this entry. */
|
|
loc = relplt->contents + plt_index * RELOC_SIZE (htab);
|
|
bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
|
|
}
|
|
|
|
/* Size sections even though they're not dynamic. We use it to setup
|
|
_TLS_MODULE_BASE_, if needed. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_always_size_sections (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
asection *tls_sec;
|
|
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
tls_sec = elf_hash_table (info)->tls_sec;
|
|
|
|
if (tls_sec)
|
|
{
|
|
struct elf_link_hash_entry *tlsbase;
|
|
|
|
tlsbase = elf_link_hash_lookup (elf_hash_table (info),
|
|
"_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
|
|
|
|
if (tlsbase)
|
|
{
|
|
struct bfd_link_hash_entry *h = NULL;
|
|
const struct elf_backend_data *bed =
|
|
get_elf_backend_data (output_bfd);
|
|
|
|
if (!(_bfd_generic_link_add_one_symbol
|
|
(info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
|
|
tls_sec, 0, NULL, FALSE, bed->collect, &h)))
|
|
return FALSE;
|
|
|
|
tlsbase->type = STT_TLS;
|
|
tlsbase = (struct elf_link_hash_entry *) h;
|
|
tlsbase->def_regular = 1;
|
|
tlsbase->other = STV_HIDDEN;
|
|
(*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Finish up dynamic symbol handling. We set the contents of various
|
|
dynamic sections here. */
|
|
static bfd_boolean
|
|
elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
|
|
struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *h,
|
|
Elf_Internal_Sym *sym)
|
|
{
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
htab = elf_aarch64_hash_table (info);
|
|
|
|
if (h->plt.offset != (bfd_vma) - 1)
|
|
{
|
|
asection *plt, *gotplt, *relplt;
|
|
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
|
it up. */
|
|
|
|
/* When building a static executable, use .iplt, .igot.plt and
|
|
.rela.iplt sections for STT_GNU_IFUNC symbols. */
|
|
if (htab->root.splt != NULL)
|
|
{
|
|
plt = htab->root.splt;
|
|
gotplt = htab->root.sgotplt;
|
|
relplt = htab->root.srelplt;
|
|
}
|
|
else
|
|
{
|
|
plt = htab->root.iplt;
|
|
gotplt = htab->root.igotplt;
|
|
relplt = htab->root.irelplt;
|
|
}
|
|
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
|
it up. */
|
|
if ((h->dynindx == -1
|
|
&& !((h->forced_local || info->executable)
|
|
&& h->def_regular
|
|
&& h->type == STT_GNU_IFUNC))
|
|
|| plt == NULL
|
|
|| gotplt == NULL
|
|
|| relplt == NULL)
|
|
abort ();
|
|
|
|
elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
|
|
if (!h->def_regular)
|
|
{
|
|
/* Mark the symbol as undefined, rather than as defined in
|
|
the .plt section. */
|
|
sym->st_shndx = SHN_UNDEF;
|
|
/* If the symbol is weak we need to clear the value.
|
|
Otherwise, the PLT entry would provide a definition for
|
|
the symbol even if the symbol wasn't defined anywhere,
|
|
and so the symbol would never be NULL. Leave the value if
|
|
there were any relocations where pointer equality matters
|
|
(this is a clue for the dynamic linker, to make function
|
|
pointer comparisons work between an application and shared
|
|
library). */
|
|
if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
|
|
sym->st_value = 0;
|
|
}
|
|
}
|
|
|
|
if (h->got.offset != (bfd_vma) - 1
|
|
&& elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL)
|
|
{
|
|
Elf_Internal_Rela rela;
|
|
bfd_byte *loc;
|
|
|
|
/* This symbol has an entry in the global offset table. Set it
|
|
up. */
|
|
if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
|
|
abort ();
|
|
|
|
rela.r_offset = (htab->root.sgot->output_section->vma
|
|
+ htab->root.sgot->output_offset
|
|
+ (h->got.offset & ~(bfd_vma) 1));
|
|
|
|
if (h->def_regular
|
|
&& h->type == STT_GNU_IFUNC)
|
|
{
|
|
if (info->shared)
|
|
{
|
|
/* Generate R_AARCH64_GLOB_DAT. */
|
|
goto do_glob_dat;
|
|
}
|
|
else
|
|
{
|
|
asection *plt;
|
|
|
|
if (!h->pointer_equality_needed)
|
|
abort ();
|
|
|
|
/* For non-shared object, we can't use .got.plt, which
|
|
contains the real function address if we need pointer
|
|
equality. We load the GOT entry with the PLT entry. */
|
|
plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
|
|
bfd_put_NN (output_bfd, (plt->output_section->vma
|
|
+ plt->output_offset
|
|
+ h->plt.offset),
|
|
htab->root.sgot->contents
|
|
+ (h->got.offset & ~(bfd_vma) 1));
|
|
return TRUE;
|
|
}
|
|
}
|
|
else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
|
|
{
|
|
if (!h->def_regular)
|
|
return FALSE;
|
|
|
|
BFD_ASSERT ((h->got.offset & 1) != 0);
|
|
rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
|
|
rela.r_addend = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
}
|
|
else
|
|
{
|
|
do_glob_dat:
|
|
BFD_ASSERT ((h->got.offset & 1) == 0);
|
|
bfd_put_NN (output_bfd, (bfd_vma) 0,
|
|
htab->root.sgot->contents + h->got.offset);
|
|
rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
|
|
rela.r_addend = 0;
|
|
}
|
|
|
|
loc = htab->root.srelgot->contents;
|
|
loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
|
|
bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
|
|
}
|
|
|
|
if (h->needs_copy)
|
|
{
|
|
Elf_Internal_Rela rela;
|
|
bfd_byte *loc;
|
|
|
|
/* This symbol needs a copy reloc. Set it up. */
|
|
|
|
if (h->dynindx == -1
|
|
|| (h->root.type != bfd_link_hash_defined
|
|
&& h->root.type != bfd_link_hash_defweak)
|
|
|| htab->srelbss == NULL)
|
|
abort ();
|
|
|
|
rela.r_offset = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
|
|
rela.r_addend = 0;
|
|
loc = htab->srelbss->contents;
|
|
loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab);
|
|
bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
|
|
}
|
|
|
|
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
|
|
be NULL for local symbols. */
|
|
if (sym != NULL
|
|
&& (h == elf_hash_table (info)->hdynamic
|
|
|| h == elf_hash_table (info)->hgot))
|
|
sym->st_shndx = SHN_ABS;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Finish up local dynamic symbol handling. We set the contents of
|
|
various dynamic sections here. */
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
|
|
{
|
|
struct elf_link_hash_entry *h
|
|
= (struct elf_link_hash_entry *) *slot;
|
|
struct bfd_link_info *info
|
|
= (struct bfd_link_info *) inf;
|
|
|
|
return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
|
|
info, h, NULL);
|
|
}
|
|
|
|
static void
|
|
elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
|
|
struct elf_aarch64_link_hash_table
|
|
*htab)
|
|
{
|
|
/* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
|
|
small and large plts and at the minute just generates
|
|
the small PLT. */
|
|
|
|
/* PLT0 of the small PLT looks like this in ELF64 -
|
|
stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
|
|
adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
|
|
ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
|
|
// symbol resolver
|
|
add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
|
|
// GOTPLT entry for this.
|
|
br x17
|
|
PLT0 will be slightly different in ELF32 due to different got entry
|
|
size.
|
|
*/
|
|
bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
|
|
bfd_vma plt_base;
|
|
|
|
|
|
memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
|
|
PLT_ENTRY_SIZE);
|
|
elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
|
|
PLT_ENTRY_SIZE;
|
|
|
|
plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
|
|
+ htab->root.sgotplt->output_offset
|
|
+ GOT_ENTRY_SIZE * 2);
|
|
|
|
plt_base = htab->root.splt->output_section->vma +
|
|
htab->root.splt->output_offset;
|
|
|
|
/* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
|
|
ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
|
|
elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
|
|
htab->root.splt->contents + 4,
|
|
PG (plt_got_2nd_ent) - PG (plt_base + 4));
|
|
|
|
elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
|
|
htab->root.splt->contents + 8,
|
|
PG_OFFSET (plt_got_2nd_ent));
|
|
|
|
elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
|
|
htab->root.splt->contents + 12,
|
|
PG_OFFSET (plt_got_2nd_ent));
|
|
}
|
|
|
|
static bfd_boolean
|
|
elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
struct elf_aarch64_link_hash_table *htab;
|
|
bfd *dynobj;
|
|
asection *sdyn;
|
|
|
|
htab = elf_aarch64_hash_table (info);
|
|
dynobj = htab->root.dynobj;
|
|
sdyn = bfd_get_linker_section (dynobj, ".dynamic");
|
|
|
|
if (htab->root.dynamic_sections_created)
|
|
{
|
|
ElfNN_External_Dyn *dyncon, *dynconend;
|
|
|
|
if (sdyn == NULL || htab->root.sgot == NULL)
|
|
abort ();
|
|
|
|
dyncon = (ElfNN_External_Dyn *) sdyn->contents;
|
|
dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
|
|
for (; dyncon < dynconend; dyncon++)
|
|
{
|
|
Elf_Internal_Dyn dyn;
|
|
asection *s;
|
|
|
|
bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
|
|
|
|
switch (dyn.d_tag)
|
|
{
|
|
default:
|
|
continue;
|
|
|
|
case DT_PLTGOT:
|
|
s = htab->root.sgotplt;
|
|
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
|
|
break;
|
|
|
|
case DT_JMPREL:
|
|
dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma;
|
|
break;
|
|
|
|
case DT_PLTRELSZ:
|
|
s = htab->root.srelplt;
|
|
dyn.d_un.d_val = s->size;
|
|
break;
|
|
|
|
case DT_RELASZ:
|
|
/* The procedure linkage table relocs (DT_JMPREL) should
|
|
not be included in the overall relocs (DT_RELA).
|
|
Therefore, we override the DT_RELASZ entry here to
|
|
make it not include the JMPREL relocs. Since the
|
|
linker script arranges for .rela.plt to follow all
|
|
other relocation sections, we don't have to worry
|
|
about changing the DT_RELA entry. */
|
|
if (htab->root.srelplt != NULL)
|
|
{
|
|
s = htab->root.srelplt;
|
|
dyn.d_un.d_val -= s->size;
|
|
}
|
|
break;
|
|
|
|
case DT_TLSDESC_PLT:
|
|
s = htab->root.splt;
|
|
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
|
|
+ htab->tlsdesc_plt;
|
|
break;
|
|
|
|
case DT_TLSDESC_GOT:
|
|
s = htab->root.sgot;
|
|
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
|
|
+ htab->dt_tlsdesc_got;
|
|
break;
|
|
}
|
|
|
|
bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
}
|
|
|
|
}
|
|
|
|
/* Fill in the special first entry in the procedure linkage table. */
|
|
if (htab->root.splt && htab->root.splt->size > 0)
|
|
{
|
|
elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
|
|
|
|
elf_section_data (htab->root.splt->output_section)->
|
|
this_hdr.sh_entsize = htab->plt_entry_size;
|
|
|
|
|
|
if (htab->tlsdesc_plt)
|
|
{
|
|
bfd_put_NN (output_bfd, (bfd_vma) 0,
|
|
htab->root.sgot->contents + htab->dt_tlsdesc_got);
|
|
|
|
memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
|
|
elfNN_aarch64_tlsdesc_small_plt_entry,
|
|
sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
|
|
|
|
{
|
|
bfd_vma adrp1_addr =
|
|
htab->root.splt->output_section->vma
|
|
+ htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
|
|
|
|
bfd_vma adrp2_addr = adrp1_addr + 4;
|
|
|
|
bfd_vma got_addr =
|
|
htab->root.sgot->output_section->vma
|
|
+ htab->root.sgot->output_offset;
|
|
|
|
bfd_vma pltgot_addr =
|
|
htab->root.sgotplt->output_section->vma
|
|
+ htab->root.sgotplt->output_offset;
|
|
|
|
bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
|
|
|
|
bfd_byte *plt_entry =
|
|
htab->root.splt->contents + htab->tlsdesc_plt;
|
|
|
|
/* adrp x2, DT_TLSDESC_GOT */
|
|
elf_aarch64_update_plt_entry (output_bfd,
|
|
BFD_RELOC_AARCH64_ADR_HI21_PCREL,
|
|
plt_entry + 4,
|
|
(PG (dt_tlsdesc_got)
|
|
- PG (adrp1_addr)));
|
|
|
|
/* adrp x3, 0 */
|
|
elf_aarch64_update_plt_entry (output_bfd,
|
|
BFD_RELOC_AARCH64_ADR_HI21_PCREL,
|
|
plt_entry + 8,
|
|
(PG (pltgot_addr)
|
|
- PG (adrp2_addr)));
|
|
|
|
/* ldr x2, [x2, #0] */
|
|
elf_aarch64_update_plt_entry (output_bfd,
|
|
BFD_RELOC_AARCH64_LDSTNN_LO12,
|
|
plt_entry + 12,
|
|
PG_OFFSET (dt_tlsdesc_got));
|
|
|
|
/* add x3, x3, 0 */
|
|
elf_aarch64_update_plt_entry (output_bfd,
|
|
BFD_RELOC_AARCH64_ADD_LO12,
|
|
plt_entry + 16,
|
|
PG_OFFSET (pltgot_addr));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (htab->root.sgotplt)
|
|
{
|
|
if (bfd_is_abs_section (htab->root.sgotplt->output_section))
|
|
{
|
|
(*_bfd_error_handler)
|
|
(_("discarded output section: `%A'"), htab->root.sgotplt);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Fill in the first three entries in the global offset table. */
|
|
if (htab->root.sgotplt->size > 0)
|
|
{
|
|
bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
|
|
|
|
/* Write GOT[1] and GOT[2], needed for the dynamic linker. */
|
|
bfd_put_NN (output_bfd,
|
|
(bfd_vma) 0,
|
|
htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
|
|
bfd_put_NN (output_bfd,
|
|
(bfd_vma) 0,
|
|
htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
|
|
}
|
|
|
|
if (htab->root.sgot)
|
|
{
|
|
if (htab->root.sgot->size > 0)
|
|
{
|
|
bfd_vma addr =
|
|
sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
|
|
bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
|
|
}
|
|
}
|
|
|
|
elf_section_data (htab->root.sgotplt->output_section)->
|
|
this_hdr.sh_entsize = GOT_ENTRY_SIZE;
|
|
}
|
|
|
|
if (htab->root.sgot && htab->root.sgot->size > 0)
|
|
elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
|
|
= GOT_ENTRY_SIZE;
|
|
|
|
/* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
|
|
htab_traverse (htab->loc_hash_table,
|
|
elfNN_aarch64_finish_local_dynamic_symbol,
|
|
info);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Return address for Ith PLT stub in section PLT, for relocation REL
|
|
or (bfd_vma) -1 if it should not be included. */
|
|
|
|
static bfd_vma
|
|
elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
|
|
const arelent *rel ATTRIBUTE_UNUSED)
|
|
{
|
|
return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
|
|
}
|
|
|
|
|
|
/* We use this so we can override certain functions
|
|
(though currently we don't). */
|
|
|
|
const struct elf_size_info elfNN_aarch64_size_info =
|
|
{
|
|
sizeof (ElfNN_External_Ehdr),
|
|
sizeof (ElfNN_External_Phdr),
|
|
sizeof (ElfNN_External_Shdr),
|
|
sizeof (ElfNN_External_Rel),
|
|
sizeof (ElfNN_External_Rela),
|
|
sizeof (ElfNN_External_Sym),
|
|
sizeof (ElfNN_External_Dyn),
|
|
sizeof (Elf_External_Note),
|
|
4, /* Hash table entry size. */
|
|
1, /* Internal relocs per external relocs. */
|
|
ARCH_SIZE, /* Arch size. */
|
|
LOG_FILE_ALIGN, /* Log_file_align. */
|
|
ELFCLASSNN, EV_CURRENT,
|
|
bfd_elfNN_write_out_phdrs,
|
|
bfd_elfNN_write_shdrs_and_ehdr,
|
|
bfd_elfNN_checksum_contents,
|
|
bfd_elfNN_write_relocs,
|
|
bfd_elfNN_swap_symbol_in,
|
|
bfd_elfNN_swap_symbol_out,
|
|
bfd_elfNN_slurp_reloc_table,
|
|
bfd_elfNN_slurp_symbol_table,
|
|
bfd_elfNN_swap_dyn_in,
|
|
bfd_elfNN_swap_dyn_out,
|
|
bfd_elfNN_swap_reloc_in,
|
|
bfd_elfNN_swap_reloc_out,
|
|
bfd_elfNN_swap_reloca_in,
|
|
bfd_elfNN_swap_reloca_out
|
|
};
|
|
|
|
#define ELF_ARCH bfd_arch_aarch64
|
|
#define ELF_MACHINE_CODE EM_AARCH64
|
|
#define ELF_MAXPAGESIZE 0x10000
|
|
#define ELF_MINPAGESIZE 0x1000
|
|
#define ELF_COMMONPAGESIZE 0x1000
|
|
|
|
#define bfd_elfNN_close_and_cleanup \
|
|
elfNN_aarch64_close_and_cleanup
|
|
|
|
#define bfd_elfNN_bfd_free_cached_info \
|
|
elfNN_aarch64_bfd_free_cached_info
|
|
|
|
#define bfd_elfNN_bfd_is_target_special_symbol \
|
|
elfNN_aarch64_is_target_special_symbol
|
|
|
|
#define bfd_elfNN_bfd_link_hash_table_create \
|
|
elfNN_aarch64_link_hash_table_create
|
|
|
|
#define bfd_elfNN_bfd_merge_private_bfd_data \
|
|
elfNN_aarch64_merge_private_bfd_data
|
|
|
|
#define bfd_elfNN_bfd_print_private_bfd_data \
|
|
elfNN_aarch64_print_private_bfd_data
|
|
|
|
#define bfd_elfNN_bfd_reloc_type_lookup \
|
|
elfNN_aarch64_reloc_type_lookup
|
|
|
|
#define bfd_elfNN_bfd_reloc_name_lookup \
|
|
elfNN_aarch64_reloc_name_lookup
|
|
|
|
#define bfd_elfNN_bfd_set_private_flags \
|
|
elfNN_aarch64_set_private_flags
|
|
|
|
#define bfd_elfNN_find_inliner_info \
|
|
elfNN_aarch64_find_inliner_info
|
|
|
|
#define bfd_elfNN_find_nearest_line \
|
|
elfNN_aarch64_find_nearest_line
|
|
|
|
#define bfd_elfNN_mkobject \
|
|
elfNN_aarch64_mkobject
|
|
|
|
#define bfd_elfNN_new_section_hook \
|
|
elfNN_aarch64_new_section_hook
|
|
|
|
#define elf_backend_adjust_dynamic_symbol \
|
|
elfNN_aarch64_adjust_dynamic_symbol
|
|
|
|
#define elf_backend_always_size_sections \
|
|
elfNN_aarch64_always_size_sections
|
|
|
|
#define elf_backend_check_relocs \
|
|
elfNN_aarch64_check_relocs
|
|
|
|
#define elf_backend_copy_indirect_symbol \
|
|
elfNN_aarch64_copy_indirect_symbol
|
|
|
|
/* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
|
|
to them in our hash. */
|
|
#define elf_backend_create_dynamic_sections \
|
|
elfNN_aarch64_create_dynamic_sections
|
|
|
|
#define elf_backend_init_index_section \
|
|
_bfd_elf_init_2_index_sections
|
|
|
|
#define elf_backend_finish_dynamic_sections \
|
|
elfNN_aarch64_finish_dynamic_sections
|
|
|
|
#define elf_backend_finish_dynamic_symbol \
|
|
elfNN_aarch64_finish_dynamic_symbol
|
|
|
|
#define elf_backend_gc_sweep_hook \
|
|
elfNN_aarch64_gc_sweep_hook
|
|
|
|
#define elf_backend_object_p \
|
|
elfNN_aarch64_object_p
|
|
|
|
#define elf_backend_output_arch_local_syms \
|
|
elfNN_aarch64_output_arch_local_syms
|
|
|
|
#define elf_backend_plt_sym_val \
|
|
elfNN_aarch64_plt_sym_val
|
|
|
|
#define elf_backend_post_process_headers \
|
|
elfNN_aarch64_post_process_headers
|
|
|
|
#define elf_backend_relocate_section \
|
|
elfNN_aarch64_relocate_section
|
|
|
|
#define elf_backend_reloc_type_class \
|
|
elfNN_aarch64_reloc_type_class
|
|
|
|
#define elf_backend_section_from_shdr \
|
|
elfNN_aarch64_section_from_shdr
|
|
|
|
#define elf_backend_size_dynamic_sections \
|
|
elfNN_aarch64_size_dynamic_sections
|
|
|
|
#define elf_backend_size_info \
|
|
elfNN_aarch64_size_info
|
|
|
|
#define elf_backend_write_section \
|
|
elfNN_aarch64_write_section
|
|
|
|
#define elf_backend_can_refcount 1
|
|
#define elf_backend_can_gc_sections 1
|
|
#define elf_backend_plt_readonly 1
|
|
#define elf_backend_want_got_plt 1
|
|
#define elf_backend_want_plt_sym 0
|
|
#define elf_backend_may_use_rel_p 0
|
|
#define elf_backend_may_use_rela_p 1
|
|
#define elf_backend_default_use_rela_p 1
|
|
#define elf_backend_rela_normal 1
|
|
#define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
|
|
#define elf_backend_default_execstack 0
|
|
|
|
#undef elf_backend_obj_attrs_section
|
|
#define elf_backend_obj_attrs_section ".ARM.attributes"
|
|
|
|
#include "elfNN-target.h"
|