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- /* AArch64-specific backend routines.
- Copyright (C) 2009-2022 Free Software Foundation, Inc.
- Contributed by ARM Ltd.
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING3. If not,
- see <http://www.gnu.org/licenses/>. */
- extern void bfd_elf64_aarch64_init_maps
- (bfd *);
- extern void bfd_elf32_aarch64_init_maps
- (bfd *);
- /* Types of PLTs based on the level of security. This would be a
- bit-mask to denote which of the combinations of security features
- are enabled:
- - No security feature PLTs
- - PLTs with BTI instruction
- - PLTs with PAC instruction
- */
- typedef enum
- {
- PLT_NORMAL = 0x0, /* Normal plts. */
- PLT_BTI = 0x1, /* plts with bti. */
- PLT_PAC = 0x2, /* plts with pointer authentication. */
- PLT_BTI_PAC = PLT_BTI | PLT_PAC
- } aarch64_plt_type;
- /* To indicate if BTI is enabled with/without warning. */
- typedef enum
- {
- BTI_NONE = 0, /* BTI is not enabled. */
- BTI_WARN = 1, /* BTI is enabled with -z force-bti. */
- } aarch64_enable_bti_type;
- /* A structure to encompass all information coming from BTI or PAC
- related command line options. This involves the "PLT_TYPE" to determine
- which version of PLTs to pick and "BTI_TYPE" to determine if
- BTI should be turned on with any warnings. */
- typedef struct
- {
- aarch64_plt_type plt_type;
- aarch64_enable_bti_type bti_type;
- } aarch64_bti_pac_info;
- /* An enum to define what kind of erratum fixes we should apply. This gives the
- user a bit more control over the sequences we generate. */
- typedef enum
- {
- ERRAT_NONE = (1 << 0), /* No erratum workarounds allowed. */
- ERRAT_ADR = (1 << 1), /* Erratum workarounds using ADR allowed. */
- ERRAT_ADRP = (1 << 2), /* Erratum workarounds using ADRP are allowed. */
- } erratum_84319_opts;
- extern void bfd_elf64_aarch64_set_options
- (bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int,
- aarch64_bti_pac_info);
- extern void bfd_elf32_aarch64_set_options
- (bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int,
- aarch64_bti_pac_info);
- /* AArch64 stub generation support for ELF64. Called from the linker. */
- extern int elf64_aarch64_setup_section_lists
- (bfd *, struct bfd_link_info *);
- extern void elf64_aarch64_next_input_section
- (struct bfd_link_info *, struct bfd_section *);
- extern bool elf64_aarch64_size_stubs
- (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma,
- struct bfd_section * (*) (const char *, struct bfd_section *),
- void (*) (void));
- extern bool elf64_aarch64_build_stubs
- (struct bfd_link_info *);
- /* AArch64 stub generation support for ELF32. Called from the linker. */
- extern int elf32_aarch64_setup_section_lists
- (bfd *, struct bfd_link_info *);
- extern void elf32_aarch64_next_input_section
- (struct bfd_link_info *, struct bfd_section *);
- extern bool elf32_aarch64_size_stubs
- (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma,
- struct bfd_section * (*) (const char *, struct bfd_section *),
- void (*) (void));
- extern bool elf32_aarch64_build_stubs
- (struct bfd_link_info *);
- /* Take the PAGE component of an address or offset. */
- #define PG(x) ((x) & ~ (bfd_vma) 0xfff)
- #define PG_OFFSET(x) ((x) & (bfd_vma) 0xfff)
- #define AARCH64_ADR_OP 0x10000000
- #define AARCH64_ADRP_OP 0x90000000
- #define AARCH64_ADRP_OP_MASK 0x9F000000
- extern bfd_signed_vma
- _bfd_aarch64_sign_extend (bfd_vma, int);
- extern uint32_t
- _bfd_aarch64_decode_adrp_imm (uint32_t);
- extern uint32_t
- _bfd_aarch64_reencode_adr_imm (uint32_t, uint32_t);
- extern bfd_reloc_status_type
- _bfd_aarch64_elf_put_addend (bfd *, bfd_byte *, bfd_reloc_code_real_type,
- reloc_howto_type *, bfd_signed_vma);
- extern bfd_vma
- _bfd_aarch64_elf_resolve_relocation (bfd *, bfd_reloc_code_real_type, bfd_vma,
- bfd_vma, bfd_vma, bool);
- extern bool
- _bfd_aarch64_elf_grok_prstatus (bfd *, Elf_Internal_Note *);
- extern bool
- _bfd_aarch64_elf_grok_psinfo (bfd *, Elf_Internal_Note *);
- extern char *
- _bfd_aarch64_elf_write_core_note (bfd *, char *, int *, int, ...);
- #define elf_backend_grok_prstatus _bfd_aarch64_elf_grok_prstatus
- #define elf_backend_grok_psinfo _bfd_aarch64_elf_grok_psinfo
- #define elf_backend_write_core_note _bfd_aarch64_elf_write_core_note
- extern bfd *
- _bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *,
- uint32_t *);
- extern enum elf_property_kind
- _bfd_aarch64_elf_parse_gnu_properties (bfd *, unsigned int,
- bfd_byte *, unsigned int);
- extern bool
- _bfd_aarch64_elf_merge_gnu_properties (struct bfd_link_info *, bfd *,
- elf_property *, elf_property *,
- uint32_t);
- extern void
- _bfd_aarch64_elf_link_fixup_gnu_properties (struct bfd_link_info *,
- elf_property_list **);
- #define elf_backend_parse_gnu_properties \
- _bfd_aarch64_elf_parse_gnu_properties
- #define elf_backend_fixup_gnu_properties \
- _bfd_aarch64_elf_link_fixup_gnu_properties
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